summaryrefslogtreecommitdiffstats
path: root/arch/arc/include
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /arch/arc/include
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arc/include')
-rw-r--r--arch/arc/include/asm/Kbuild6
-rw-r--r--arch/arc/include/asm/arcregs.h359
-rw-r--r--arch/arc/include/asm/asm-offsets.h6
-rw-r--r--arch/arc/include/asm/asserts.h34
-rw-r--r--arch/arc/include/asm/atomic-llsc.h97
-rw-r--r--arch/arc/include/asm/atomic-spinlock.h102
-rw-r--r--arch/arc/include/asm/atomic.h60
-rw-r--r--arch/arc/include/asm/atomic64-arcv2.h250
-rw-r--r--arch/arc/include/asm/barrier.h44
-rw-r--r--arch/arc/include/asm/bitops.h197
-rw-r--r--arch/arc/include/asm/bug.h34
-rw-r--r--arch/arc/include/asm/cache.h128
-rw-r--r--arch/arc/include/asm/cacheflush.h117
-rw-r--r--arch/arc/include/asm/checksum.h98
-rw-r--r--arch/arc/include/asm/cmpxchg.h143
-rw-r--r--arch/arc/include/asm/current.h25
-rw-r--r--arch/arc/include/asm/delay.h69
-rw-r--r--arch/arc/include/asm/disasm.h113
-rw-r--r--arch/arc/include/asm/dma.h11
-rw-r--r--arch/arc/include/asm/dsp-impl.h152
-rw-r--r--arch/arc/include/asm/dsp.h29
-rw-r--r--arch/arc/include/asm/dwarf.h35
-rw-r--r--arch/arc/include/asm/elf.h72
-rw-r--r--arch/arc/include/asm/entry-arcv2.h284
-rw-r--r--arch/arc/include/asm/entry-compact.h304
-rw-r--r--arch/arc/include/asm/entry.h298
-rw-r--r--arch/arc/include/asm/exec.h12
-rw-r--r--arch/arc/include/asm/fb.h20
-rw-r--r--arch/arc/include/asm/fpu.h57
-rw-r--r--arch/arc/include/asm/futex.h169
-rw-r--r--arch/arc/include/asm/highmem.h53
-rw-r--r--arch/arc/include/asm/hugepage.h67
-rw-r--r--arch/arc/include/asm/io.h235
-rw-r--r--arch/arc/include/asm/irq.h29
-rw-r--r--arch/arc/include/asm/irqflags-arcv2.h175
-rw-r--r--arch/arc/include/asm/irqflags-compact.h201
-rw-r--r--arch/arc/include/asm/irqflags.h16
-rw-r--r--arch/arc/include/asm/jump_label.h72
-rw-r--r--arch/arc/include/asm/kdebug.h16
-rw-r--r--arch/arc/include/asm/kgdb.h60
-rw-r--r--arch/arc/include/asm/kprobes.h55
-rw-r--r--arch/arc/include/asm/linkage.h80
-rw-r--r--arch/arc/include/asm/mach_desc.h64
-rw-r--r--arch/arc/include/asm/mmu-arcv2.h103
-rw-r--r--arch/arc/include/asm/mmu.h21
-rw-r--r--arch/arc/include/asm/mmu_context.h174
-rw-r--r--arch/arc/include/asm/module.h21
-rw-r--r--arch/arc/include/asm/page.h139
-rw-r--r--arch/arc/include/asm/pci.h19
-rw-r--r--arch/arc/include/asm/perf_event.h70
-rw-r--r--arch/arc/include/asm/pgalloc.h97
-rw-r--r--arch/arc/include/asm/pgtable-bits-arcv2.h131
-rw-r--r--arch/arc/include/asm/pgtable-levels.h187
-rw-r--r--arch/arc/include/asm/pgtable.h34
-rw-r--r--arch/arc/include/asm/processor.h107
-rw-r--r--arch/arc/include/asm/ptrace.h186
-rw-r--r--arch/arc/include/asm/sections.h13
-rw-r--r--arch/arc/include/asm/serial.h19
-rw-r--r--arch/arc/include/asm/setup.h45
-rw-r--r--arch/arc/include/asm/shmparam.h15
-rw-r--r--arch/arc/include/asm/smp.h128
-rw-r--r--arch/arc/include/asm/spinlock.h382
-rw-r--r--arch/arc/include/asm/spinlock_types.h34
-rw-r--r--arch/arc/include/asm/stacktrace.h34
-rw-r--r--arch/arc/include/asm/string.h34
-rw-r--r--arch/arc/include/asm/switch_to.h27
-rw-r--r--arch/arc/include/asm/syscall.h80
-rw-r--r--arch/arc/include/asm/syscalls.h22
-rw-r--r--arch/arc/include/asm/thread_info.h106
-rw-r--r--arch/arc/include/asm/timex.h15
-rw-r--r--arch/arc/include/asm/tlb.h12
-rw-r--r--arch/arc/include/asm/tlbflush.h42
-rw-r--r--arch/arc/include/asm/uaccess.h643
-rw-r--r--arch/arc/include/asm/unaligned.h27
-rw-r--r--arch/arc/include/asm/unwind.h156
-rw-r--r--arch/arc/include/asm/vermagic.h8
-rw-r--r--arch/arc/include/asm/vmalloc.h4
-rw-r--r--arch/arc/include/uapi/asm/Kbuild2
-rw-r--r--arch/arc/include/uapi/asm/bpf_perf_event.h9
-rw-r--r--arch/arc/include/uapi/asm/byteorder.h19
-rw-r--r--arch/arc/include/uapi/asm/cachectl.h29
-rw-r--r--arch/arc/include/uapi/asm/elf.h35
-rw-r--r--arch/arc/include/uapi/asm/page.h36
-rw-r--r--arch/arc/include/uapi/asm/ptrace.h58
-rw-r--r--arch/arc/include/uapi/asm/setup.h6
-rw-r--r--arch/arc/include/uapi/asm/sigcontext.h24
-rw-r--r--arch/arc/include/uapi/asm/signal.h28
-rw-r--r--arch/arc/include/uapi/asm/swab.h99
-rw-r--r--arch/arc/include/uapi/asm/unistd.h52
89 files changed, 7980 insertions, 0 deletions
diff --git a/arch/arc/include/asm/Kbuild b/arch/arc/include/asm/Kbuild
new file mode 100644
index 000000000..3c1afa524
--- /dev/null
+++ b/arch/arc/include/asm/Kbuild
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0
+generic-y += extable.h
+generic-y += kvm_para.h
+generic-y += mcs_spinlock.h
+generic-y += parport.h
+generic-y += user.h
diff --git a/arch/arc/include/asm/arcregs.h b/arch/arc/include/asm/arcregs.h
new file mode 100644
index 000000000..216202319
--- /dev/null
+++ b/arch/arc/include/asm/arcregs.h
@@ -0,0 +1,359 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef _ASM_ARC_ARCREGS_H
+#define _ASM_ARC_ARCREGS_H
+
+/* Build Configuration Registers */
+#define ARC_REG_AUX_DCCM 0x18 /* DCCM Base Addr ARCv2 */
+#define ARC_REG_ERP_CTRL 0x3F /* ARCv2 Error protection control */
+#define ARC_REG_DCCM_BASE_BUILD 0x61 /* DCCM Base Addr ARCompact */
+#define ARC_REG_CRC_BCR 0x62
+#define ARC_REG_VECBASE_BCR 0x68
+#define ARC_REG_PERIBASE_BCR 0x69
+#define ARC_REG_FP_BCR 0x6B /* ARCompact: Single-Precision FPU */
+#define ARC_REG_DPFP_BCR 0x6C /* ARCompact: Dbl Precision FPU */
+#define ARC_REG_ERP_BUILD 0xc7 /* ARCv2 Error protection Build: ECC/Parity */
+#define ARC_REG_FP_V2_BCR 0xc8 /* ARCv2 FPU */
+#define ARC_REG_SLC_BCR 0xce
+#define ARC_REG_DCCM_BUILD 0x74 /* DCCM size (common) */
+#define ARC_REG_AP_BCR 0x76
+#define ARC_REG_ICCM_BUILD 0x78 /* ICCM size (common) */
+#define ARC_REG_XY_MEM_BCR 0x79
+#define ARC_REG_MAC_BCR 0x7a
+#define ARC_REG_MUL_BCR 0x7b
+#define ARC_REG_SWAP_BCR 0x7c
+#define ARC_REG_NORM_BCR 0x7d
+#define ARC_REG_MIXMAX_BCR 0x7e
+#define ARC_REG_BARREL_BCR 0x7f
+#define ARC_REG_D_UNCACH_BCR 0x6A
+#define ARC_REG_BPU_BCR 0xc0
+#define ARC_REG_ISA_CFG_BCR 0xc1
+#define ARC_REG_LPB_BUILD 0xE9 /* ARCv2 Loop Buffer Build */
+#define ARC_REG_RTT_BCR 0xF2
+#define ARC_REG_IRQ_BCR 0xF3
+#define ARC_REG_MICRO_ARCH_BCR 0xF9 /* ARCv2 Product revision */
+#define ARC_REG_SMART_BCR 0xFF
+#define ARC_REG_CLUSTER_BCR 0xcf
+#define ARC_REG_AUX_ICCM 0x208 /* ICCM Base Addr (ARCv2) */
+#define ARC_REG_LPB_CTRL 0x488 /* ARCv2 Loop Buffer control */
+#define ARC_REG_FPU_CTRL 0x300
+#define ARC_REG_FPU_STATUS 0x301
+
+/* Common for ARCompact and ARCv2 status register */
+#define ARC_REG_STATUS32 0x0A
+
+/* status32 Bits Positions */
+#define STATUS_AE_BIT 5 /* Exception active */
+#define STATUS_DE_BIT 6 /* PC is in delay slot */
+#define STATUS_U_BIT 7 /* User/Kernel mode */
+#define STATUS_Z_BIT 11
+#define STATUS_L_BIT 12 /* Loop inhibit */
+
+/* These masks correspond to the status word(STATUS_32) bits */
+#define STATUS_AE_MASK (1<<STATUS_AE_BIT)
+#define STATUS_DE_MASK (1<<STATUS_DE_BIT)
+#define STATUS_U_MASK (1<<STATUS_U_BIT)
+#define STATUS_Z_MASK (1<<STATUS_Z_BIT)
+#define STATUS_L_MASK (1<<STATUS_L_BIT)
+
+/*
+ * ECR: Exception Cause Reg bits-n-pieces
+ * [23:16] = Exception Vector
+ * [15: 8] = Exception Cause Code
+ * [ 7: 0] = Exception Parameters (for certain types only)
+ */
+#ifdef CONFIG_ISA_ARCOMPACT
+#define ECR_V_MEM_ERR 0x01
+#define ECR_V_INSN_ERR 0x02
+#define ECR_V_MACH_CHK 0x20
+#define ECR_V_ITLB_MISS 0x21
+#define ECR_V_DTLB_MISS 0x22
+#define ECR_V_PROTV 0x23
+#define ECR_V_TRAP 0x25
+#else
+#define ECR_V_MEM_ERR 0x01
+#define ECR_V_INSN_ERR 0x02
+#define ECR_V_MACH_CHK 0x03
+#define ECR_V_ITLB_MISS 0x04
+#define ECR_V_DTLB_MISS 0x05
+#define ECR_V_PROTV 0x06
+#define ECR_V_TRAP 0x09
+#define ECR_V_MISALIGN 0x0d
+#endif
+
+/* DTLB Miss and Protection Violation Cause Codes */
+
+#define ECR_C_PROTV_INST_FETCH 0x00
+#define ECR_C_PROTV_LOAD 0x01
+#define ECR_C_PROTV_STORE 0x02
+#define ECR_C_PROTV_XCHG 0x03
+#define ECR_C_PROTV_MISALIG_DATA 0x04
+
+#define ECR_C_BIT_PROTV_MISALIG_DATA 10
+
+/* Machine Check Cause Code Values */
+#define ECR_C_MCHK_DUP_TLB 0x01
+
+/* DTLB Miss Exception Cause Code Values */
+#define ECR_C_BIT_DTLB_LD_MISS 8
+#define ECR_C_BIT_DTLB_ST_MISS 9
+
+/* Auxiliary registers */
+#define AUX_IDENTITY 4
+#define AUX_EXEC_CTRL 8
+#define AUX_INTR_VEC_BASE 0x25
+#define AUX_VOL 0x5e
+
+/*
+ * Floating Pt Registers
+ * Status regs are read-only (build-time) so need not be saved/restored
+ */
+#define ARC_AUX_FP_STAT 0x300
+#define ARC_AUX_DPFP_1L 0x301
+#define ARC_AUX_DPFP_1H 0x302
+#define ARC_AUX_DPFP_2L 0x303
+#define ARC_AUX_DPFP_2H 0x304
+#define ARC_AUX_DPFP_STAT 0x305
+
+/*
+ * DSP-related registers
+ * Registers names must correspond to dsp_callee_regs structure fields names
+ * for automatic offset calculation in DSP_AUX_SAVE_RESTORE macros.
+ */
+#define ARC_AUX_DSP_BUILD 0x7A
+#define ARC_AUX_ACC0_LO 0x580
+#define ARC_AUX_ACC0_GLO 0x581
+#define ARC_AUX_ACC0_HI 0x582
+#define ARC_AUX_ACC0_GHI 0x583
+#define ARC_AUX_DSP_BFLY0 0x598
+#define ARC_AUX_DSP_CTRL 0x59F
+#define ARC_AUX_DSP_FFT_CTRL 0x59E
+
+#define ARC_AUX_AGU_BUILD 0xCC
+#define ARC_AUX_AGU_AP0 0x5C0
+#define ARC_AUX_AGU_AP1 0x5C1
+#define ARC_AUX_AGU_AP2 0x5C2
+#define ARC_AUX_AGU_AP3 0x5C3
+#define ARC_AUX_AGU_OS0 0x5D0
+#define ARC_AUX_AGU_OS1 0x5D1
+#define ARC_AUX_AGU_MOD0 0x5E0
+#define ARC_AUX_AGU_MOD1 0x5E1
+#define ARC_AUX_AGU_MOD2 0x5E2
+#define ARC_AUX_AGU_MOD3 0x5E3
+
+#ifndef __ASSEMBLY__
+
+#include <soc/arc/aux.h>
+
+/* Helpers */
+#define TO_KB(bytes) ((bytes) >> 10)
+#define TO_MB(bytes) (TO_KB(bytes) >> 10)
+#define PAGES_TO_KB(n_pages) ((n_pages) << (PAGE_SHIFT - 10))
+#define PAGES_TO_MB(n_pages) (PAGES_TO_KB(n_pages) >> 10)
+
+
+/*
+ ***************************************************************
+ * Build Configuration Registers, with encoded hardware config
+ */
+struct bcr_identity {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned int chip_id:16, cpu_id:8, family:8;
+#else
+ unsigned int family:8, cpu_id:8, chip_id:16;
+#endif
+};
+
+struct bcr_isa_arcv2 {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned int div_rem:4, pad2:4, ldd:1, unalign:1, atomic:1, be:1,
+ pad1:12, ver:8;
+#else
+ unsigned int ver:8, pad1:12, be:1, atomic:1, unalign:1,
+ ldd:1, pad2:4, div_rem:4;
+#endif
+};
+
+struct bcr_uarch_build_arcv2 {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned int pad:8, prod:8, maj:8, min:8;
+#else
+ unsigned int min:8, maj:8, prod:8, pad:8;
+#endif
+};
+
+struct bcr_mpy {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned int pad:8, x1616:8, dsp:4, cycles:2, type:2, ver:8;
+#else
+ unsigned int ver:8, type:2, cycles:2, dsp:4, x1616:8, pad:8;
+#endif
+};
+
+struct bcr_iccm_arcompact {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned int base:16, pad:5, sz:3, ver:8;
+#else
+ unsigned int ver:8, sz:3, pad:5, base:16;
+#endif
+};
+
+struct bcr_iccm_arcv2 {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned int pad:8, sz11:4, sz01:4, sz10:4, sz00:4, ver:8;
+#else
+ unsigned int ver:8, sz00:4, sz10:4, sz01:4, sz11:4, pad:8;
+#endif
+};
+
+struct bcr_dccm_arcompact {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned int res:21, sz:3, ver:8;
+#else
+ unsigned int ver:8, sz:3, res:21;
+#endif
+};
+
+struct bcr_dccm_arcv2 {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned int pad2:12, cyc:3, pad1:1, sz1:4, sz0:4, ver:8;
+#else
+ unsigned int ver:8, sz0:4, sz1:4, pad1:1, cyc:3, pad2:12;
+#endif
+};
+
+/* ARCompact: Both SP and DP FPU BCRs have same format */
+struct bcr_fp_arcompact {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned int fast:1, ver:8;
+#else
+ unsigned int ver:8, fast:1;
+#endif
+};
+
+struct bcr_fp_arcv2 {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned int pad2:15, dp:1, pad1:7, sp:1, ver:8;
+#else
+ unsigned int ver:8, sp:1, pad1:7, dp:1, pad2:15;
+#endif
+};
+
+struct bcr_actionpoint {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned int pad:21, min:1, num:2, ver:8;
+#else
+ unsigned int ver:8, num:2, min:1, pad:21;
+#endif
+};
+
+#include <soc/arc/timers.h>
+
+struct bcr_bpu_arcompact {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned int pad2:19, fam:1, pad:2, ent:2, ver:8;
+#else
+ unsigned int ver:8, ent:2, pad:2, fam:1, pad2:19;
+#endif
+};
+
+struct bcr_bpu_arcv2 {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned int pad:6, fbe:2, tqe:2, ts:4, ft:1, rse:2, pte:3, bce:3, ver:8;
+#else
+ unsigned int ver:8, bce:3, pte:3, rse:2, ft:1, ts:4, tqe:2, fbe:2, pad:6;
+#endif
+};
+
+/* Error Protection Build: ECC/Parity */
+struct bcr_erp {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned int pad3:5, mmu:3, pad2:4, ic:3, dc:3, pad1:6, ver:8;
+#else
+ unsigned int ver:8, pad1:6, dc:3, ic:3, pad2:4, mmu:3, pad3:5;
+#endif
+};
+
+/* Error Protection Control */
+struct ctl_erp {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned int pad2:27, mpd:1, pad1:2, dpd:1, dpi:1;
+#else
+ unsigned int dpi:1, dpd:1, pad1:2, mpd:1, pad2:27;
+#endif
+};
+
+struct bcr_lpb {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned int pad:16, entries:8, ver:8;
+#else
+ unsigned int ver:8, entries:8, pad:16;
+#endif
+};
+
+struct bcr_generic {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned int info:24, ver:8;
+#else
+ unsigned int ver:8, info:24;
+#endif
+};
+
+/*
+ *******************************************************************
+ * Generic structures to hold build configuration used at runtime
+ */
+
+struct cpuinfo_arc_mmu {
+ unsigned int ver:4, pg_sz_k:8, s_pg_sz_m:8, pad:10, sasid:1, pae:1;
+ unsigned int sets:12, ways:4, u_dtlb:8, u_itlb:8;
+};
+
+struct cpuinfo_arc_cache {
+ unsigned int sz_k:14, line_len:8, assoc:4, alias:1, vipt:1, pad:4;
+};
+
+struct cpuinfo_arc_bpu {
+ unsigned int ver, full, num_cache, num_pred, ret_stk;
+};
+
+struct cpuinfo_arc_ccm {
+ unsigned int base_addr, sz;
+};
+
+struct cpuinfo_arc {
+ struct cpuinfo_arc_cache icache, dcache, slc;
+ struct cpuinfo_arc_mmu mmu;
+ struct cpuinfo_arc_bpu bpu;
+ struct bcr_identity core;
+ struct bcr_isa_arcv2 isa;
+ const char *release, *name;
+ unsigned int vec_base;
+ struct cpuinfo_arc_ccm iccm, dccm;
+ struct {
+ unsigned int swap:1, norm:1, minmax:1, barrel:1, crc:1, swape:1, pad1:2,
+ fpu_sp:1, fpu_dp:1, dual:1, dual_enb:1, pad2:4,
+ ap_num:4, ap_full:1, smart:1, rtt:1, pad3:1,
+ timer0:1, timer1:1, rtc:1, gfrc:1, pad4:4;
+ } extn;
+ struct bcr_mpy extn_mpy;
+};
+
+extern struct cpuinfo_arc cpuinfo_arc700[];
+
+static inline int is_isa_arcv2(void)
+{
+ return IS_ENABLED(CONFIG_ISA_ARCV2);
+}
+
+static inline int is_isa_arcompact(void)
+{
+ return IS_ENABLED(CONFIG_ISA_ARCOMPACT);
+}
+
+#endif /* __ASEMBLY__ */
+
+#endif /* _ASM_ARC_ARCREGS_H */
diff --git a/arch/arc/include/asm/asm-offsets.h b/arch/arc/include/asm/asm-offsets.h
new file mode 100644
index 000000000..32a1d3d51
--- /dev/null
+++ b/arch/arc/include/asm/asm-offsets.h
@@ -0,0 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#include <generated/asm-offsets.h>
diff --git a/arch/arc/include/asm/asserts.h b/arch/arc/include/asm/asserts.h
new file mode 100644
index 000000000..108f33be6
--- /dev/null
+++ b/arch/arc/include/asm/asserts.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2020 Synopsys, Inc. (www.synopsys.com)
+ *
+ * Author: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
+ */
+#ifndef __ASM_ARC_ASSERTS_H
+#define __ASM_ARC_ASSERTS_H
+
+/* Helpers to sanitize config options. */
+
+void chk_opt_strict(char *opt_name, bool hw_exists, bool opt_ena);
+void chk_opt_weak(char *opt_name, bool hw_exists, bool opt_ena);
+
+/*
+ * Check required config option:
+ * - panic in case of OPT enabled but corresponding HW absent.
+ * - warn in case of OPT disabled but corresponding HW exists.
+*/
+#define CHK_OPT_STRICT(opt_name, hw_exists) \
+({ \
+ chk_opt_strict(#opt_name, hw_exists, IS_ENABLED(opt_name)); \
+})
+
+/*
+ * Check optional config option:
+ * - panic in case of OPT enabled but corresponding HW absent.
+*/
+#define CHK_OPT_WEAK(opt_name, hw_exists) \
+({ \
+ chk_opt_weak(#opt_name, hw_exists, IS_ENABLED(opt_name)); \
+})
+
+#endif /* __ASM_ARC_ASSERTS_H */
diff --git a/arch/arc/include/asm/atomic-llsc.h b/arch/arc/include/asm/atomic-llsc.h
new file mode 100644
index 000000000..5258cb81a
--- /dev/null
+++ b/arch/arc/include/asm/atomic-llsc.h
@@ -0,0 +1,97 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef _ASM_ARC_ATOMIC_LLSC_H
+#define _ASM_ARC_ATOMIC_LLSC_H
+
+#define arch_atomic_set(v, i) WRITE_ONCE(((v)->counter), (i))
+
+#define ATOMIC_OP(op, asm_op) \
+static inline void arch_atomic_##op(int i, atomic_t *v) \
+{ \
+ unsigned int val; \
+ \
+ __asm__ __volatile__( \
+ "1: llock %[val], [%[ctr]] \n" \
+ " " #asm_op " %[val], %[val], %[i] \n" \
+ " scond %[val], [%[ctr]] \n" \
+ " bnz 1b \n" \
+ : [val] "=&r" (val) /* Early clobber to prevent reg reuse */ \
+ : [ctr] "r" (&v->counter), /* Not "m": llock only supports reg direct addr mode */ \
+ [i] "ir" (i) \
+ : "cc", "memory"); \
+} \
+
+#define ATOMIC_OP_RETURN(op, asm_op) \
+static inline int arch_atomic_##op##_return_relaxed(int i, atomic_t *v) \
+{ \
+ unsigned int val; \
+ \
+ __asm__ __volatile__( \
+ "1: llock %[val], [%[ctr]] \n" \
+ " " #asm_op " %[val], %[val], %[i] \n" \
+ " scond %[val], [%[ctr]] \n" \
+ " bnz 1b \n" \
+ : [val] "=&r" (val) \
+ : [ctr] "r" (&v->counter), \
+ [i] "ir" (i) \
+ : "cc", "memory"); \
+ \
+ return val; \
+}
+
+#define arch_atomic_add_return_relaxed arch_atomic_add_return_relaxed
+#define arch_atomic_sub_return_relaxed arch_atomic_sub_return_relaxed
+
+#define ATOMIC_FETCH_OP(op, asm_op) \
+static inline int arch_atomic_fetch_##op##_relaxed(int i, atomic_t *v) \
+{ \
+ unsigned int val, orig; \
+ \
+ __asm__ __volatile__( \
+ "1: llock %[orig], [%[ctr]] \n" \
+ " " #asm_op " %[val], %[orig], %[i] \n" \
+ " scond %[val], [%[ctr]] \n" \
+ " bnz 1b \n" \
+ : [val] "=&r" (val), \
+ [orig] "=&r" (orig) \
+ : [ctr] "r" (&v->counter), \
+ [i] "ir" (i) \
+ : "cc", "memory"); \
+ \
+ return orig; \
+}
+
+#define arch_atomic_fetch_add_relaxed arch_atomic_fetch_add_relaxed
+#define arch_atomic_fetch_sub_relaxed arch_atomic_fetch_sub_relaxed
+
+#define arch_atomic_fetch_and_relaxed arch_atomic_fetch_and_relaxed
+#define arch_atomic_fetch_andnot_relaxed arch_atomic_fetch_andnot_relaxed
+#define arch_atomic_fetch_or_relaxed arch_atomic_fetch_or_relaxed
+#define arch_atomic_fetch_xor_relaxed arch_atomic_fetch_xor_relaxed
+
+#define ATOMIC_OPS(op, asm_op) \
+ ATOMIC_OP(op, asm_op) \
+ ATOMIC_OP_RETURN(op, asm_op) \
+ ATOMIC_FETCH_OP(op, asm_op)
+
+ATOMIC_OPS(add, add)
+ATOMIC_OPS(sub, sub)
+
+#undef ATOMIC_OPS
+#define ATOMIC_OPS(op, asm_op) \
+ ATOMIC_OP(op, asm_op) \
+ ATOMIC_FETCH_OP(op, asm_op)
+
+ATOMIC_OPS(and, and)
+ATOMIC_OPS(andnot, bic)
+ATOMIC_OPS(or, or)
+ATOMIC_OPS(xor, xor)
+
+#define arch_atomic_andnot arch_atomic_andnot
+
+#undef ATOMIC_OPS
+#undef ATOMIC_FETCH_OP
+#undef ATOMIC_OP_RETURN
+#undef ATOMIC_OP
+
+#endif
diff --git a/arch/arc/include/asm/atomic-spinlock.h b/arch/arc/include/asm/atomic-spinlock.h
new file mode 100644
index 000000000..2c830347b
--- /dev/null
+++ b/arch/arc/include/asm/atomic-spinlock.h
@@ -0,0 +1,102 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef _ASM_ARC_ATOMIC_SPLOCK_H
+#define _ASM_ARC_ATOMIC_SPLOCK_H
+
+/*
+ * Non hardware assisted Atomic-R-M-W
+ * Locking would change to irq-disabling only (UP) and spinlocks (SMP)
+ */
+
+static inline void arch_atomic_set(atomic_t *v, int i)
+{
+ /*
+ * Independent of hardware support, all of the atomic_xxx() APIs need
+ * to follow the same locking rules to make sure that a "hardware"
+ * atomic insn (e.g. LD) doesn't clobber an "emulated" atomic insn
+ * sequence
+ *
+ * Thus atomic_set() despite being 1 insn (and seemingly atomic)
+ * requires the locking.
+ */
+ unsigned long flags;
+
+ atomic_ops_lock(flags);
+ WRITE_ONCE(v->counter, i);
+ atomic_ops_unlock(flags);
+}
+
+#define arch_atomic_set_release(v, i) arch_atomic_set((v), (i))
+
+#define ATOMIC_OP(op, c_op, asm_op) \
+static inline void arch_atomic_##op(int i, atomic_t *v) \
+{ \
+ unsigned long flags; \
+ \
+ atomic_ops_lock(flags); \
+ v->counter c_op i; \
+ atomic_ops_unlock(flags); \
+}
+
+#define ATOMIC_OP_RETURN(op, c_op, asm_op) \
+static inline int arch_atomic_##op##_return(int i, atomic_t *v) \
+{ \
+ unsigned long flags; \
+ unsigned int temp; \
+ \
+ /* \
+ * spin lock/unlock provides the needed smp_mb() before/after \
+ */ \
+ atomic_ops_lock(flags); \
+ temp = v->counter; \
+ temp c_op i; \
+ v->counter = temp; \
+ atomic_ops_unlock(flags); \
+ \
+ return temp; \
+}
+
+#define ATOMIC_FETCH_OP(op, c_op, asm_op) \
+static inline int arch_atomic_fetch_##op(int i, atomic_t *v) \
+{ \
+ unsigned long flags; \
+ unsigned int orig; \
+ \
+ /* \
+ * spin lock/unlock provides the needed smp_mb() before/after \
+ */ \
+ atomic_ops_lock(flags); \
+ orig = v->counter; \
+ v->counter c_op i; \
+ atomic_ops_unlock(flags); \
+ \
+ return orig; \
+}
+
+#define ATOMIC_OPS(op, c_op, asm_op) \
+ ATOMIC_OP(op, c_op, asm_op) \
+ ATOMIC_OP_RETURN(op, c_op, asm_op) \
+ ATOMIC_FETCH_OP(op, c_op, asm_op)
+
+ATOMIC_OPS(add, +=, add)
+ATOMIC_OPS(sub, -=, sub)
+
+#undef ATOMIC_OPS
+#define ATOMIC_OPS(op, c_op, asm_op) \
+ ATOMIC_OP(op, c_op, asm_op) \
+ ATOMIC_FETCH_OP(op, c_op, asm_op)
+
+ATOMIC_OPS(and, &=, and)
+ATOMIC_OPS(andnot, &= ~, bic)
+ATOMIC_OPS(or, |=, or)
+ATOMIC_OPS(xor, ^=, xor)
+
+#define arch_atomic_andnot arch_atomic_andnot
+#define arch_atomic_fetch_andnot arch_atomic_fetch_andnot
+
+#undef ATOMIC_OPS
+#undef ATOMIC_FETCH_OP
+#undef ATOMIC_OP_RETURN
+#undef ATOMIC_OP
+
+#endif
diff --git a/arch/arc/include/asm/atomic.h b/arch/arc/include/asm/atomic.h
new file mode 100644
index 000000000..52ee51e1f
--- /dev/null
+++ b/arch/arc/include/asm/atomic.h
@@ -0,0 +1,60 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef _ASM_ARC_ATOMIC_H
+#define _ASM_ARC_ATOMIC_H
+
+#ifndef __ASSEMBLY__
+
+#include <linux/types.h>
+#include <linux/compiler.h>
+#include <asm/cmpxchg.h>
+#include <asm/barrier.h>
+#include <asm/smp.h>
+
+#define arch_atomic_read(v) READ_ONCE((v)->counter)
+
+#ifdef CONFIG_ARC_HAS_LLSC
+#include <asm/atomic-llsc.h>
+#else
+#include <asm/atomic-spinlock.h>
+#endif
+
+#define arch_atomic_cmpxchg(v, o, n) \
+({ \
+ arch_cmpxchg(&((v)->counter), (o), (n)); \
+})
+
+#ifdef arch_cmpxchg_relaxed
+#define arch_atomic_cmpxchg_relaxed(v, o, n) \
+({ \
+ arch_cmpxchg_relaxed(&((v)->counter), (o), (n)); \
+})
+#endif
+
+#define arch_atomic_xchg(v, n) \
+({ \
+ arch_xchg(&((v)->counter), (n)); \
+})
+
+#ifdef arch_xchg_relaxed
+#define arch_atomic_xchg_relaxed(v, n) \
+({ \
+ arch_xchg_relaxed(&((v)->counter), (n)); \
+})
+#endif
+
+/*
+ * 64-bit atomics
+ */
+#ifdef CONFIG_GENERIC_ATOMIC64
+#include <asm-generic/atomic64.h>
+#else
+#include <asm/atomic64-arcv2.h>
+#endif
+
+#endif /* !__ASSEMBLY__ */
+
+#endif
diff --git a/arch/arc/include/asm/atomic64-arcv2.h b/arch/arc/include/asm/atomic64-arcv2.h
new file mode 100644
index 000000000..9089f34ba
--- /dev/null
+++ b/arch/arc/include/asm/atomic64-arcv2.h
@@ -0,0 +1,250 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+/*
+ * ARCv2 supports 64-bit exclusive load (LLOCKD) / store (SCONDD)
+ * - The address HAS to be 64-bit aligned
+ */
+
+#ifndef _ASM_ARC_ATOMIC64_ARCV2_H
+#define _ASM_ARC_ATOMIC64_ARCV2_H
+
+typedef struct {
+ s64 __aligned(8) counter;
+} atomic64_t;
+
+#define ATOMIC64_INIT(a) { (a) }
+
+static inline s64 arch_atomic64_read(const atomic64_t *v)
+{
+ s64 val;
+
+ __asm__ __volatile__(
+ " ldd %0, [%1] \n"
+ : "=r"(val)
+ : "r"(&v->counter));
+
+ return val;
+}
+
+static inline void arch_atomic64_set(atomic64_t *v, s64 a)
+{
+ /*
+ * This could have been a simple assignment in "C" but would need
+ * explicit volatile. Otherwise gcc optimizers could elide the store
+ * which borked atomic64 self-test
+ * In the inline asm version, memory clobber needed for exact same
+ * reason, to tell gcc about the store.
+ *
+ * This however is not needed for sibling atomic64_add() etc since both
+ * load/store are explicitly done in inline asm. As long as API is used
+ * for each access, gcc has no way to optimize away any load/store
+ */
+ __asm__ __volatile__(
+ " std %0, [%1] \n"
+ :
+ : "r"(a), "r"(&v->counter)
+ : "memory");
+}
+
+#define ATOMIC64_OP(op, op1, op2) \
+static inline void arch_atomic64_##op(s64 a, atomic64_t *v) \
+{ \
+ s64 val; \
+ \
+ __asm__ __volatile__( \
+ "1: \n" \
+ " llockd %0, [%1] \n" \
+ " " #op1 " %L0, %L0, %L2 \n" \
+ " " #op2 " %H0, %H0, %H2 \n" \
+ " scondd %0, [%1] \n" \
+ " bnz 1b \n" \
+ : "=&r"(val) \
+ : "r"(&v->counter), "ir"(a) \
+ : "cc", "memory"); \
+} \
+
+#define ATOMIC64_OP_RETURN(op, op1, op2) \
+static inline s64 arch_atomic64_##op##_return_relaxed(s64 a, atomic64_t *v) \
+{ \
+ s64 val; \
+ \
+ __asm__ __volatile__( \
+ "1: \n" \
+ " llockd %0, [%1] \n" \
+ " " #op1 " %L0, %L0, %L2 \n" \
+ " " #op2 " %H0, %H0, %H2 \n" \
+ " scondd %0, [%1] \n" \
+ " bnz 1b \n" \
+ : [val] "=&r"(val) \
+ : "r"(&v->counter), "ir"(a) \
+ : "cc", "memory"); \
+ \
+ return val; \
+}
+
+#define arch_atomic64_add_return_relaxed arch_atomic64_add_return_relaxed
+#define arch_atomic64_sub_return_relaxed arch_atomic64_sub_return_relaxed
+
+#define ATOMIC64_FETCH_OP(op, op1, op2) \
+static inline s64 arch_atomic64_fetch_##op##_relaxed(s64 a, atomic64_t *v) \
+{ \
+ s64 val, orig; \
+ \
+ __asm__ __volatile__( \
+ "1: \n" \
+ " llockd %0, [%2] \n" \
+ " " #op1 " %L1, %L0, %L3 \n" \
+ " " #op2 " %H1, %H0, %H3 \n" \
+ " scondd %1, [%2] \n" \
+ " bnz 1b \n" \
+ : "=&r"(orig), "=&r"(val) \
+ : "r"(&v->counter), "ir"(a) \
+ : "cc", "memory"); \
+ \
+ return orig; \
+}
+
+#define arch_atomic64_fetch_add_relaxed arch_atomic64_fetch_add_relaxed
+#define arch_atomic64_fetch_sub_relaxed arch_atomic64_fetch_sub_relaxed
+
+#define arch_atomic64_fetch_and_relaxed arch_atomic64_fetch_and_relaxed
+#define arch_atomic64_fetch_andnot_relaxed arch_atomic64_fetch_andnot_relaxed
+#define arch_atomic64_fetch_or_relaxed arch_atomic64_fetch_or_relaxed
+#define arch_atomic64_fetch_xor_relaxed arch_atomic64_fetch_xor_relaxed
+
+#define ATOMIC64_OPS(op, op1, op2) \
+ ATOMIC64_OP(op, op1, op2) \
+ ATOMIC64_OP_RETURN(op, op1, op2) \
+ ATOMIC64_FETCH_OP(op, op1, op2)
+
+ATOMIC64_OPS(add, add.f, adc)
+ATOMIC64_OPS(sub, sub.f, sbc)
+
+#undef ATOMIC64_OPS
+#define ATOMIC64_OPS(op, op1, op2) \
+ ATOMIC64_OP(op, op1, op2) \
+ ATOMIC64_FETCH_OP(op, op1, op2)
+
+ATOMIC64_OPS(and, and, and)
+ATOMIC64_OPS(andnot, bic, bic)
+ATOMIC64_OPS(or, or, or)
+ATOMIC64_OPS(xor, xor, xor)
+
+#define arch_atomic64_andnot arch_atomic64_andnot
+
+#undef ATOMIC64_OPS
+#undef ATOMIC64_FETCH_OP
+#undef ATOMIC64_OP_RETURN
+#undef ATOMIC64_OP
+
+static inline s64
+arch_atomic64_cmpxchg(atomic64_t *ptr, s64 expected, s64 new)
+{
+ s64 prev;
+
+ smp_mb();
+
+ __asm__ __volatile__(
+ "1: llockd %0, [%1] \n"
+ " brne %L0, %L2, 2f \n"
+ " brne %H0, %H2, 2f \n"
+ " scondd %3, [%1] \n"
+ " bnz 1b \n"
+ "2: \n"
+ : "=&r"(prev)
+ : "r"(ptr), "ir"(expected), "r"(new)
+ : "cc"); /* memory clobber comes from smp_mb() */
+
+ smp_mb();
+
+ return prev;
+}
+
+static inline s64 arch_atomic64_xchg(atomic64_t *ptr, s64 new)
+{
+ s64 prev;
+
+ smp_mb();
+
+ __asm__ __volatile__(
+ "1: llockd %0, [%1] \n"
+ " scondd %2, [%1] \n"
+ " bnz 1b \n"
+ "2: \n"
+ : "=&r"(prev)
+ : "r"(ptr), "r"(new)
+ : "cc"); /* memory clobber comes from smp_mb() */
+
+ smp_mb();
+
+ return prev;
+}
+
+/**
+ * arch_atomic64_dec_if_positive - decrement by 1 if old value positive
+ * @v: pointer of type atomic64_t
+ *
+ * The function returns the old value of *v minus 1, even if
+ * the atomic variable, v, was not decremented.
+ */
+
+static inline s64 arch_atomic64_dec_if_positive(atomic64_t *v)
+{
+ s64 val;
+
+ smp_mb();
+
+ __asm__ __volatile__(
+ "1: llockd %0, [%1] \n"
+ " sub.f %L0, %L0, 1 # w0 - 1, set C on borrow\n"
+ " sub.c %H0, %H0, 1 # if C set, w1 - 1\n"
+ " brlt %H0, 0, 2f \n"
+ " scondd %0, [%1] \n"
+ " bnz 1b \n"
+ "2: \n"
+ : "=&r"(val)
+ : "r"(&v->counter)
+ : "cc"); /* memory clobber comes from smp_mb() */
+
+ smp_mb();
+
+ return val;
+}
+#define arch_atomic64_dec_if_positive arch_atomic64_dec_if_positive
+
+/**
+ * arch_atomic64_fetch_add_unless - add unless the number is a given value
+ * @v: pointer of type atomic64_t
+ * @a: the amount to add to v...
+ * @u: ...unless v is equal to u.
+ *
+ * Atomically adds @a to @v, if it was not @u.
+ * Returns the old value of @v
+ */
+static inline s64 arch_atomic64_fetch_add_unless(atomic64_t *v, s64 a, s64 u)
+{
+ s64 old, temp;
+
+ smp_mb();
+
+ __asm__ __volatile__(
+ "1: llockd %0, [%2] \n"
+ " brne %L0, %L4, 2f # continue to add since v != u \n"
+ " breq.d %H0, %H4, 3f # return since v == u \n"
+ "2: \n"
+ " add.f %L1, %L0, %L3 \n"
+ " adc %H1, %H0, %H3 \n"
+ " scondd %1, [%2] \n"
+ " bnz 1b \n"
+ "3: \n"
+ : "=&r"(old), "=&r" (temp)
+ : "r"(&v->counter), "r"(a), "r"(u)
+ : "cc"); /* memory clobber comes from smp_mb() */
+
+ smp_mb();
+
+ return old;
+}
+#define arch_atomic64_fetch_add_unless arch_atomic64_fetch_add_unless
+
+#endif
diff --git a/arch/arc/include/asm/barrier.h b/arch/arc/include/asm/barrier.h
new file mode 100644
index 000000000..4637de9e0
--- /dev/null
+++ b/arch/arc/include/asm/barrier.h
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef __ASM_BARRIER_H
+#define __ASM_BARRIER_H
+
+#ifdef CONFIG_ISA_ARCV2
+
+/*
+ * ARCv2 based HS38 cores are in-order issue, but still weakly ordered
+ * due to micro-arch buffering/queuing of load/store, cache hit vs. miss ...
+ *
+ * Explicit barrier provided by DMB instruction
+ * - Operand supports fine grained load/store/load+store semantics
+ * - Ensures that selected memory operation issued before it will complete
+ * before any subsequent memory operation of same type
+ * - DMB guarantees SMP as well as local barrier semantics
+ * (asm-generic/barrier.h ensures sane smp_*mb if not defined here, i.e.
+ * UP: barrier(), SMP: smp_*mb == *mb)
+ * - DSYNC provides DMB+completion_of_cache_bpu_maintenance_ops hence not needed
+ * in the general case. Plus it only provides full barrier.
+ */
+
+#define mb() asm volatile("dmb 3\n" : : : "memory")
+#define rmb() asm volatile("dmb 1\n" : : : "memory")
+#define wmb() asm volatile("dmb 2\n" : : : "memory")
+
+#else
+
+/*
+ * ARCompact based cores (ARC700) only have SYNC instruction which is super
+ * heavy weight as it flushes the pipeline as well.
+ * There are no real SMP implementations of such cores.
+ */
+
+#define mb() asm volatile("sync\n" : : : "memory")
+
+#endif
+
+#include <asm-generic/barrier.h>
+
+#endif
diff --git a/arch/arc/include/asm/bitops.h b/arch/arc/include/asm/bitops.h
new file mode 100644
index 000000000..f5a936496
--- /dev/null
+++ b/arch/arc/include/asm/bitops.h
@@ -0,0 +1,197 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef _ASM_BITOPS_H
+#define _ASM_BITOPS_H
+
+#ifndef _LINUX_BITOPS_H
+#error only <linux/bitops.h> can be included directly
+#endif
+
+#ifndef __ASSEMBLY__
+
+#include <linux/types.h>
+#include <linux/compiler.h>
+
+#ifdef CONFIG_ISA_ARCOMPACT
+
+/*
+ * Count the number of zeros, starting from MSB
+ * Helper for fls( ) friends
+ * This is a pure count, so (1-32) or (0-31) doesn't apply
+ * It could be 0 to 32, based on num of 0's in there
+ * clz(0x8000_0000) = 0, clz(0xFFFF_FFFF)=0, clz(0) = 32, clz(1) = 31
+ */
+static inline __attribute__ ((const)) int clz(unsigned int x)
+{
+ unsigned int res;
+
+ __asm__ __volatile__(
+ " norm.f %0, %1 \n"
+ " mov.n %0, 0 \n"
+ " add.p %0, %0, 1 \n"
+ : "=r"(res)
+ : "r"(x)
+ : "cc");
+
+ return res;
+}
+
+static inline int constant_fls(unsigned int x)
+{
+ int r = 32;
+
+ if (!x)
+ return 0;
+ if (!(x & 0xffff0000u)) {
+ x <<= 16;
+ r -= 16;
+ }
+ if (!(x & 0xff000000u)) {
+ x <<= 8;
+ r -= 8;
+ }
+ if (!(x & 0xf0000000u)) {
+ x <<= 4;
+ r -= 4;
+ }
+ if (!(x & 0xc0000000u)) {
+ x <<= 2;
+ r -= 2;
+ }
+ if (!(x & 0x80000000u))
+ r -= 1;
+ return r;
+}
+
+/*
+ * fls = Find Last Set in word
+ * @result: [1-32]
+ * fls(1) = 1, fls(0x80000000) = 32, fls(0) = 0
+ */
+static inline __attribute__ ((const)) int fls(unsigned int x)
+{
+ if (__builtin_constant_p(x))
+ return constant_fls(x);
+
+ return 32 - clz(x);
+}
+
+/*
+ * __fls: Similar to fls, but zero based (0-31)
+ */
+static inline __attribute__ ((const)) unsigned long __fls(unsigned long x)
+{
+ if (!x)
+ return 0;
+ else
+ return fls(x) - 1;
+}
+
+/*
+ * ffs = Find First Set in word (LSB to MSB)
+ * @result: [1-32], 0 if all 0's
+ */
+#define ffs(x) ({ unsigned long __t = (x); fls(__t & -__t); })
+
+/*
+ * __ffs: Similar to ffs, but zero based (0-31)
+ */
+static inline __attribute__ ((const)) unsigned long __ffs(unsigned long word)
+{
+ if (!word)
+ return word;
+
+ return ffs(word) - 1;
+}
+
+#else /* CONFIG_ISA_ARCV2 */
+
+/*
+ * fls = Find Last Set in word
+ * @result: [1-32]
+ * fls(1) = 1, fls(0x80000000) = 32, fls(0) = 0
+ */
+static inline __attribute__ ((const)) int fls(unsigned int x)
+{
+ int n;
+
+ asm volatile(
+ " fls.f %0, %1 \n" /* 0:31; 0(Z) if src 0 */
+ " add.nz %0, %0, 1 \n" /* 0:31 -> 1:32 */
+ : "=r"(n) /* Early clobber not needed */
+ : "r"(x)
+ : "cc");
+
+ return n;
+}
+
+/*
+ * __fls: Similar to fls, but zero based (0-31). Also 0 if no bit set
+ */
+static inline __attribute__ ((const)) unsigned long __fls(unsigned long x)
+{
+ /* FLS insn has exactly same semantics as the API */
+ return __builtin_arc_fls(x);
+}
+
+/*
+ * ffs = Find First Set in word (LSB to MSB)
+ * @result: [1-32], 0 if all 0's
+ */
+static inline __attribute__ ((const)) int ffs(unsigned int x)
+{
+ int n;
+
+ asm volatile(
+ " ffs.f %0, %1 \n" /* 0:31; 31(Z) if src 0 */
+ " add.nz %0, %0, 1 \n" /* 0:31 -> 1:32 */
+ " mov.z %0, 0 \n" /* 31(Z)-> 0 */
+ : "=r"(n) /* Early clobber not needed */
+ : "r"(x)
+ : "cc");
+
+ return n;
+}
+
+/*
+ * __ffs: Similar to ffs, but zero based (0-31)
+ */
+static inline __attribute__ ((const)) unsigned long __ffs(unsigned long x)
+{
+ unsigned long n;
+
+ asm volatile(
+ " ffs.f %0, %1 \n" /* 0:31; 31(Z) if src 0 */
+ " mov.z %0, 0 \n" /* 31(Z)-> 0 */
+ : "=r"(n)
+ : "r"(x)
+ : "cc");
+
+ return n;
+
+}
+
+#endif /* CONFIG_ISA_ARCOMPACT */
+
+/*
+ * ffz = Find First Zero in word.
+ * @return:[0-31], 32 if all 1's
+ */
+#define ffz(x) __ffs(~(x))
+
+#include <asm-generic/bitops/hweight.h>
+#include <asm-generic/bitops/fls64.h>
+#include <asm-generic/bitops/sched.h>
+#include <asm-generic/bitops/lock.h>
+#include <asm-generic/bitops/atomic.h>
+#include <asm-generic/bitops/non-atomic.h>
+
+#include <asm-generic/bitops/le.h>
+#include <asm-generic/bitops/ext2-atomic-setbit.h>
+
+#endif /* !__ASSEMBLY__ */
+
+#endif
diff --git a/arch/arc/include/asm/bug.h b/arch/arc/include/asm/bug.h
new file mode 100644
index 000000000..4c453ba96
--- /dev/null
+++ b/arch/arc/include/asm/bug.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef _ASM_ARC_BUG_H
+#define _ASM_ARC_BUG_H
+
+#ifndef __ASSEMBLY__
+
+#include <asm/ptrace.h>
+
+struct task_struct;
+
+void show_regs(struct pt_regs *regs);
+void show_stacktrace(struct task_struct *tsk, struct pt_regs *regs,
+ const char *loglvl);
+void show_kernel_fault_diag(const char *str, struct pt_regs *regs,
+ unsigned long address);
+void die(const char *str, struct pt_regs *regs, unsigned long address);
+
+#define BUG() do { \
+ pr_warn("BUG: failure at %s:%d/%s()!\n", __FILE__, __LINE__, __func__); \
+ barrier_before_unreachable(); \
+ __builtin_trap(); \
+} while (0)
+
+#define HAVE_ARCH_BUG
+
+#include <asm-generic/bug.h>
+
+#endif /* !__ASSEMBLY__ */
+
+#endif
diff --git a/arch/arc/include/asm/cache.h b/arch/arc/include/asm/cache.h
new file mode 100644
index 000000000..f0f1fc5d6
--- /dev/null
+++ b/arch/arc/include/asm/cache.h
@@ -0,0 +1,128 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef __ARC_ASM_CACHE_H
+#define __ARC_ASM_CACHE_H
+
+/* In case $$ not config, setup a dummy number for rest of kernel */
+#ifndef CONFIG_ARC_CACHE_LINE_SHIFT
+#define L1_CACHE_SHIFT 6
+#else
+#define L1_CACHE_SHIFT CONFIG_ARC_CACHE_LINE_SHIFT
+#endif
+
+#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT)
+#define CACHE_LINE_MASK (~(L1_CACHE_BYTES - 1))
+
+/*
+ * ARC700 doesn't cache any access in top 1G (0xc000_0000 to 0xFFFF_FFFF)
+ * Ideal for wiring memory mapped peripherals as we don't need to do
+ * explicit uncached accesses (LD.di/ST.di) hence more portable drivers
+ */
+#define ARC_UNCACHED_ADDR_SPACE 0xc0000000
+
+#ifndef __ASSEMBLY__
+
+#include <linux/build_bug.h>
+
+/* Uncached access macros */
+#define arc_read_uncached_32(ptr) \
+({ \
+ unsigned int __ret; \
+ __asm__ __volatile__( \
+ " ld.di %0, [%1] \n" \
+ : "=r"(__ret) \
+ : "r"(ptr)); \
+ __ret; \
+})
+
+#define arc_write_uncached_32(ptr, data)\
+({ \
+ __asm__ __volatile__( \
+ " st.di %0, [%1] \n" \
+ : \
+ : "r"(data), "r"(ptr)); \
+})
+
+/* Largest line length for either L1 or L2 is 128 bytes */
+#define SMP_CACHE_BYTES 128
+#define cache_line_size() SMP_CACHE_BYTES
+#define ARCH_DMA_MINALIGN SMP_CACHE_BYTES
+
+/*
+ * Make sure slab-allocated buffers are 64-bit aligned when atomic64_t uses
+ * ARCv2 64-bit atomics (LLOCKD/SCONDD). This guarantess runtime 64-bit
+ * alignment for any atomic64_t embedded in buffer.
+ * Default ARCH_SLAB_MINALIGN is __alignof__(long long) which has a relaxed
+ * value of 4 (and not 8) in ARC ABI.
+ */
+#if defined(CONFIG_ARC_HAS_LL64) && defined(CONFIG_ARC_HAS_LLSC)
+#define ARCH_SLAB_MINALIGN 8
+#endif
+
+extern int ioc_enable;
+extern unsigned long perip_base, perip_end;
+
+#endif /* !__ASSEMBLY__ */
+
+/* Instruction cache related Auxiliary registers */
+#define ARC_REG_IC_BCR 0x77 /* Build Config reg */
+#define ARC_REG_IC_IVIC 0x10
+#define ARC_REG_IC_CTRL 0x11
+#define ARC_REG_IC_IVIR 0x16
+#define ARC_REG_IC_ENDR 0x17
+#define ARC_REG_IC_IVIL 0x19
+#define ARC_REG_IC_PTAG 0x1E
+#define ARC_REG_IC_PTAG_HI 0x1F
+
+/* Bit val in IC_CTRL */
+#define IC_CTRL_DIS 0x1
+
+/* Data cache related Auxiliary registers */
+#define ARC_REG_DC_BCR 0x72 /* Build Config reg */
+#define ARC_REG_DC_IVDC 0x47
+#define ARC_REG_DC_CTRL 0x48
+#define ARC_REG_DC_IVDL 0x4A
+#define ARC_REG_DC_FLSH 0x4B
+#define ARC_REG_DC_FLDL 0x4C
+#define ARC_REG_DC_STARTR 0x4D
+#define ARC_REG_DC_ENDR 0x4E
+#define ARC_REG_DC_PTAG 0x5C
+#define ARC_REG_DC_PTAG_HI 0x5F
+
+/* Bit val in DC_CTRL */
+#define DC_CTRL_DIS 0x001
+#define DC_CTRL_INV_MODE_FLUSH 0x040
+#define DC_CTRL_FLUSH_STATUS 0x100
+#define DC_CTRL_RGN_OP_INV 0x200
+#define DC_CTRL_RGN_OP_MSK 0x200
+
+/*System-level cache (L2 cache) related Auxiliary registers */
+#define ARC_REG_SLC_CFG 0x901
+#define ARC_REG_SLC_CTRL 0x903
+#define ARC_REG_SLC_FLUSH 0x904
+#define ARC_REG_SLC_INVALIDATE 0x905
+#define ARC_AUX_SLC_IVDL 0x910
+#define ARC_AUX_SLC_FLDL 0x912
+#define ARC_REG_SLC_RGN_START 0x914
+#define ARC_REG_SLC_RGN_START1 0x915
+#define ARC_REG_SLC_RGN_END 0x916
+#define ARC_REG_SLC_RGN_END1 0x917
+
+/* Bit val in SLC_CONTROL */
+#define SLC_CTRL_DIS 0x001
+#define SLC_CTRL_IM 0x040
+#define SLC_CTRL_BUSY 0x100
+#define SLC_CTRL_RGN_OP_INV 0x200
+
+/* IO coherency related Auxiliary registers */
+#define ARC_REG_IO_COH_ENABLE 0x500
+#define ARC_IO_COH_ENABLE_BIT BIT(0)
+#define ARC_REG_IO_COH_PARTIAL 0x501
+#define ARC_IO_COH_PARTIAL_BIT BIT(0)
+#define ARC_REG_IO_COH_AP0_BASE 0x508
+#define ARC_REG_IO_COH_AP0_SIZE 0x509
+
+#endif /* _ASM_CACHE_H */
diff --git a/arch/arc/include/asm/cacheflush.h b/arch/arc/include/asm/cacheflush.h
new file mode 100644
index 000000000..e201b4b16
--- /dev/null
+++ b/arch/arc/include/asm/cacheflush.h
@@ -0,0 +1,117 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * vineetg: May 2011: for Non-aliasing VIPT D-cache following can be NOPs
+ * -flush_cache_dup_mm (fork)
+ * -likewise for flush_cache_mm (exit/execve)
+ * -likewise for flush_cache_{range,page} (munmap, exit, COW-break)
+ *
+ * vineetg: April 2008
+ * -Added a critical CacheLine flush to copy_to_user_page( ) which
+ * was causing gdbserver to not setup breakpoints consistently
+ */
+
+#ifndef _ASM_CACHEFLUSH_H
+#define _ASM_CACHEFLUSH_H
+
+#include <linux/mm.h>
+#include <asm/shmparam.h>
+
+/*
+ * Semantically we need this because icache doesn't snoop dcache/dma.
+ * However ARC Cache flush requires paddr as well as vaddr, latter not available
+ * in the flush_icache_page() API. So we no-op it but do the equivalent work
+ * in update_mmu_cache()
+ */
+#define flush_icache_page(vma, page)
+
+void flush_cache_all(void);
+
+void flush_icache_range(unsigned long kstart, unsigned long kend);
+void __sync_icache_dcache(phys_addr_t paddr, unsigned long vaddr, int len);
+void __inv_icache_page(phys_addr_t paddr, unsigned long vaddr);
+void __flush_dcache_page(phys_addr_t paddr, unsigned long vaddr);
+
+#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
+
+void flush_dcache_page(struct page *page);
+
+void dma_cache_wback_inv(phys_addr_t start, unsigned long sz);
+void dma_cache_inv(phys_addr_t start, unsigned long sz);
+void dma_cache_wback(phys_addr_t start, unsigned long sz);
+
+#define flush_dcache_mmap_lock(mapping) do { } while (0)
+#define flush_dcache_mmap_unlock(mapping) do { } while (0)
+
+/* TBD: optimize this */
+#define flush_cache_vmap(start, end) flush_cache_all()
+#define flush_cache_vunmap(start, end) flush_cache_all()
+
+#define flush_cache_dup_mm(mm) /* called on fork (VIVT only) */
+
+#ifndef CONFIG_ARC_CACHE_VIPT_ALIASING
+
+#define flush_cache_mm(mm) /* called on munmap/exit */
+#define flush_cache_range(mm, u_vstart, u_vend)
+#define flush_cache_page(vma, u_vaddr, pfn) /* PF handling/COW-break */
+
+#else /* VIPT aliasing dcache */
+
+/* To clear out stale userspace mappings */
+void flush_cache_mm(struct mm_struct *mm);
+void flush_cache_range(struct vm_area_struct *vma,
+ unsigned long start,unsigned long end);
+void flush_cache_page(struct vm_area_struct *vma,
+ unsigned long user_addr, unsigned long page);
+
+/*
+ * To make sure that userspace mapping is flushed to memory before
+ * get_user_pages() uses a kernel mapping to access the page
+ */
+#define ARCH_HAS_FLUSH_ANON_PAGE
+void flush_anon_page(struct vm_area_struct *vma,
+ struct page *page, unsigned long u_vaddr);
+
+#endif /* CONFIG_ARC_CACHE_VIPT_ALIASING */
+
+/*
+ * A new pagecache page has PG_arch_1 clear - thus dcache dirty by default
+ * This works around some PIO based drivers which don't call flush_dcache_page
+ * to record that they dirtied the dcache
+ */
+#define PG_dc_clean PG_arch_1
+
+#define CACHE_COLORS_NUM 4
+#define CACHE_COLORS_MSK (CACHE_COLORS_NUM - 1)
+#define CACHE_COLOR(addr) (((unsigned long)(addr) >> (PAGE_SHIFT)) & CACHE_COLORS_MSK)
+
+/*
+ * Simple wrapper over config option
+ * Bootup code ensures that hardware matches kernel configuration
+ */
+static inline int cache_is_vipt_aliasing(void)
+{
+ return IS_ENABLED(CONFIG_ARC_CACHE_VIPT_ALIASING);
+}
+
+/*
+ * checks if two addresses (after page aligning) index into same cache set
+ */
+#define addr_not_cache_congruent(addr1, addr2) \
+({ \
+ cache_is_vipt_aliasing() ? \
+ (CACHE_COLOR(addr1) != CACHE_COLOR(addr2)) : 0; \
+})
+
+#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
+do { \
+ memcpy(dst, src, len); \
+ if (vma->vm_flags & VM_EXEC) \
+ __sync_icache_dcache((unsigned long)(dst), vaddr, len); \
+} while (0)
+
+#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
+ memcpy(dst, src, len); \
+
+#endif
diff --git a/arch/arc/include/asm/checksum.h b/arch/arc/include/asm/checksum.h
new file mode 100644
index 000000000..0b485800a
--- /dev/null
+++ b/arch/arc/include/asm/checksum.h
@@ -0,0 +1,98 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * Joern Rennecke <joern.rennecke@embecosm.com>: Jan 2012
+ * -Insn Scheduling improvements to csum core routines.
+ * = csum_fold( ) largely derived from ARM version.
+ * = ip_fast_cum( ) to have module scheduling
+ * -gcc 4.4.x broke networking. Alias analysis needed to be primed.
+ * worked around by adding memory clobber to ip_fast_csum( )
+ *
+ * vineetg: May 2010
+ * -Rewrote ip_fast_cscum( ) and csum_fold( ) with fast inline asm
+ */
+
+#ifndef _ASM_ARC_CHECKSUM_H
+#define _ASM_ARC_CHECKSUM_H
+
+/*
+ * Fold a partial checksum
+ *
+ * The 2 swords comprising the 32bit sum are added, any carry to 16th bit
+ * added back and final sword result inverted.
+ */
+static inline __sum16 csum_fold(__wsum s)
+{
+ unsigned int r = s << 16 | s >> 16; /* ror */
+ s = ~s;
+ s -= r;
+ return s >> 16;
+}
+
+/*
+ * This is a version of ip_compute_csum() optimized for IP headers,
+ * which always checksum on 4 octet boundaries.
+ */
+static inline __sum16
+ip_fast_csum(const void *iph, unsigned int ihl)
+{
+ const void *ptr = iph;
+ unsigned int tmp, tmp2, sum;
+
+ __asm__(
+ " ld.ab %0, [%3, 4] \n"
+ " ld.ab %2, [%3, 4] \n"
+ " sub %1, %4, 2 \n"
+ " lsr.f lp_count, %1, 1 \n"
+ " bcc 0f \n"
+ " add.f %0, %0, %2 \n"
+ " ld.ab %2, [%3, 4] \n"
+ "0: lp 1f \n"
+ " ld.ab %1, [%3, 4] \n"
+ " adc.f %0, %0, %2 \n"
+ " ld.ab %2, [%3, 4] \n"
+ " adc.f %0, %0, %1 \n"
+ "1: adc.f %0, %0, %2 \n"
+ " add.cs %0,%0,1 \n"
+ : "=&r"(sum), "=r"(tmp), "=&r"(tmp2), "+&r" (ptr)
+ : "r"(ihl)
+ : "cc", "lp_count", "memory");
+
+ return csum_fold(sum);
+}
+
+/*
+ * TCP pseudo Header is 12 bytes:
+ * SA [4], DA [4], zeroes [1], Proto[1], TCP Seg(hdr+data) Len [2]
+ */
+static inline __wsum
+csum_tcpudp_nofold(__be32 saddr, __be32 daddr, __u32 len,
+ __u8 proto, __wsum sum)
+{
+ __asm__ __volatile__(
+ " add.f %0, %0, %1 \n"
+ " adc.f %0, %0, %2 \n"
+ " adc.f %0, %0, %3 \n"
+ " adc.f %0, %0, %4 \n"
+ " adc %0, %0, 0 \n"
+ : "+&r"(sum)
+ : "r"(saddr), "r"(daddr),
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ "r"(len),
+#else
+ "r"(len << 8),
+#endif
+ "r"(htons(proto))
+ : "cc");
+
+ return sum;
+}
+
+#define csum_fold csum_fold
+#define ip_fast_csum ip_fast_csum
+#define csum_tcpudp_nofold csum_tcpudp_nofold
+
+#include <asm-generic/checksum.h>
+
+#endif /* _ASM_ARC_CHECKSUM_H */
diff --git a/arch/arc/include/asm/cmpxchg.h b/arch/arc/include/asm/cmpxchg.h
new file mode 100644
index 000000000..c5b544a5f
--- /dev/null
+++ b/arch/arc/include/asm/cmpxchg.h
@@ -0,0 +1,143 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef __ASM_ARC_CMPXCHG_H
+#define __ASM_ARC_CMPXCHG_H
+
+#include <linux/build_bug.h>
+#include <linux/types.h>
+
+#include <asm/barrier.h>
+#include <asm/smp.h>
+
+#ifdef CONFIG_ARC_HAS_LLSC
+
+/*
+ * if (*ptr == @old)
+ * *ptr = @new
+ */
+#define __cmpxchg(ptr, old, new) \
+({ \
+ __typeof__(*(ptr)) _prev; \
+ \
+ __asm__ __volatile__( \
+ "1: llock %0, [%1] \n" \
+ " brne %0, %2, 2f \n" \
+ " scond %3, [%1] \n" \
+ " bnz 1b \n" \
+ "2: \n" \
+ : "=&r"(_prev) /* Early clobber prevent reg reuse */ \
+ : "r"(ptr), /* Not "m": llock only supports reg */ \
+ "ir"(old), \
+ "r"(new) /* Not "ir": scond can't take LIMM */ \
+ : "cc", \
+ "memory"); /* gcc knows memory is clobbered */ \
+ \
+ _prev; \
+})
+
+#define arch_cmpxchg_relaxed(ptr, old, new) \
+({ \
+ __typeof__(ptr) _p_ = (ptr); \
+ __typeof__(*(ptr)) _o_ = (old); \
+ __typeof__(*(ptr)) _n_ = (new); \
+ __typeof__(*(ptr)) _prev_; \
+ \
+ switch(sizeof((_p_))) { \
+ case 4: \
+ _prev_ = __cmpxchg(_p_, _o_, _n_); \
+ break; \
+ default: \
+ BUILD_BUG(); \
+ } \
+ _prev_; \
+})
+
+#else
+
+#define arch_cmpxchg(ptr, old, new) \
+({ \
+ volatile __typeof__(ptr) _p_ = (ptr); \
+ __typeof__(*(ptr)) _o_ = (old); \
+ __typeof__(*(ptr)) _n_ = (new); \
+ __typeof__(*(ptr)) _prev_; \
+ unsigned long __flags; \
+ \
+ BUILD_BUG_ON(sizeof(_p_) != 4); \
+ \
+ /* \
+ * spin lock/unlock provide the needed smp_mb() before/after \
+ */ \
+ atomic_ops_lock(__flags); \
+ _prev_ = *_p_; \
+ if (_prev_ == _o_) \
+ *_p_ = _n_; \
+ atomic_ops_unlock(__flags); \
+ _prev_; \
+})
+
+#endif
+
+/*
+ * xchg
+ */
+#ifdef CONFIG_ARC_HAS_LLSC
+
+#define __xchg(ptr, val) \
+({ \
+ __asm__ __volatile__( \
+ " ex %0, [%1] \n" /* set new value */ \
+ : "+r"(val) \
+ : "r"(ptr) \
+ : "memory"); \
+ _val_; /* get old value */ \
+})
+
+#define arch_xchg_relaxed(ptr, val) \
+({ \
+ __typeof__(ptr) _p_ = (ptr); \
+ __typeof__(*(ptr)) _val_ = (val); \
+ \
+ switch(sizeof(*(_p_))) { \
+ case 4: \
+ _val_ = __xchg(_p_, _val_); \
+ break; \
+ default: \
+ BUILD_BUG(); \
+ } \
+ _val_; \
+})
+
+#else /* !CONFIG_ARC_HAS_LLSC */
+
+/*
+ * EX instructions is baseline and present in !LLSC too. But in this
+ * regime it still needs use @atomic_ops_lock spinlock to allow interop
+ * with cmpxchg() which uses spinlock in !LLSC
+ * (llist.h use xchg and cmpxchg on sama data)
+ */
+
+#define arch_xchg(ptr, val) \
+({ \
+ __typeof__(ptr) _p_ = (ptr); \
+ __typeof__(*(ptr)) _val_ = (val); \
+ \
+ unsigned long __flags; \
+ \
+ atomic_ops_lock(__flags); \
+ \
+ __asm__ __volatile__( \
+ " ex %0, [%1] \n" \
+ : "+r"(_val_) \
+ : "r"(_p_) \
+ : "memory"); \
+ \
+ atomic_ops_unlock(__flags); \
+ _val_; \
+})
+
+#endif
+
+#endif
diff --git a/arch/arc/include/asm/current.h b/arch/arc/include/asm/current.h
new file mode 100644
index 000000000..9b9bdd3e6
--- /dev/null
+++ b/arch/arc/include/asm/current.h
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * Vineetg: May 16th, 2008
+ * - Current macro is now implemented as "global register" r25
+ */
+
+#ifndef _ASM_ARC_CURRENT_H
+#define _ASM_ARC_CURRENT_H
+
+#ifndef __ASSEMBLY__
+
+#ifdef CONFIG_ARC_CURR_IN_REG
+
+register struct task_struct *curr_arc asm("r25");
+#define current (curr_arc)
+
+#else
+#include <asm-generic/current.h>
+#endif /* ! CONFIG_ARC_CURR_IN_REG */
+
+#endif /* ! __ASSEMBLY__ */
+
+#endif /* _ASM_ARC_CURRENT_H */
diff --git a/arch/arc/include/asm/delay.h b/arch/arc/include/asm/delay.h
new file mode 100644
index 000000000..54db798f0
--- /dev/null
+++ b/arch/arc/include/asm/delay.h
@@ -0,0 +1,69 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * Delay routines using pre computed loops_per_jiffy value.
+ *
+ * vineetg: Feb 2012
+ * -Rewrote in "C" to avoid dealing with availability of H/w MPY
+ * -Also reduced the num of MPY operations from 3 to 2
+ *
+ * Amit Bhor: Codito Technologies 2004
+ */
+
+#ifndef __ASM_ARC_UDELAY_H
+#define __ASM_ARC_UDELAY_H
+
+#include <asm-generic/types.h>
+#include <asm/param.h> /* HZ */
+
+extern unsigned long loops_per_jiffy;
+
+static inline void __delay(unsigned long loops)
+{
+ __asm__ __volatile__(
+ " mov lp_count, %0 \n"
+ " lp 1f \n"
+ " nop \n"
+ "1: \n"
+ :
+ : "r"(loops)
+ : "lp_count");
+}
+
+extern void __bad_udelay(void);
+
+/*
+ * Normal Math for computing loops in "N" usecs
+ * -we have precomputed @loops_per_jiffy
+ * -1 sec has HZ jiffies
+ * loops per "N" usecs = ((loops_per_jiffy * HZ / 1000000) * N)
+ *
+ * Approximate Division by multiplication:
+ * -Mathematically if we multiply and divide a number by same value the
+ * result remains unchanged: In this case, we use 2^32
+ * -> (loops_per_N_usec * 2^32 ) / 2^32
+ * -> (((loops_per_jiffy * HZ / 1000000) * N) * 2^32) / 2^32
+ * -> (loops_per_jiffy * HZ * N * 4295) / 2^32
+ *
+ * -Divide by 2^32 is very simply right shift by 32
+ * -We simply need to ensure that the multiply per above eqn happens in
+ * 64-bit precision (if CPU doesn't support it - gcc can emaulate it)
+ */
+
+static inline void __udelay(unsigned long usecs)
+{
+ unsigned long loops;
+
+ /* (u64) cast ensures 64 bit MPY - real or emulated
+ * HZ * 4295 is pre-evaluated by gcc - hence only 2 mpy ops
+ */
+ loops = ((u64) usecs * 4295 * HZ * loops_per_jiffy) >> 32;
+
+ __delay(loops);
+}
+
+#define udelay(n) (__builtin_constant_p(n) ? ((n) > 20000 ? __bad_udelay() \
+ : __udelay(n)) : __udelay(n))
+
+#endif /* __ASM_ARC_UDELAY_H */
diff --git a/arch/arc/include/asm/disasm.h b/arch/arc/include/asm/disasm.h
new file mode 100644
index 000000000..61fb4d7af
--- /dev/null
+++ b/arch/arc/include/asm/disasm.h
@@ -0,0 +1,113 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * several functions that help interpret ARC instructions
+ * used for unaligned accesses, kprobes and kgdb
+ *
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef __ARC_DISASM_H__
+#define __ARC_DISASM_H__
+
+enum {
+ op_Bcc = 0, op_BLcc = 1, op_LD = 2, op_ST = 3, op_MAJOR_4 = 4,
+ op_MAJOR_5 = 5, op_LD_ADD = 12, op_ADD_SUB_SHIFT = 13,
+ op_ADD_MOV_CMP = 14, op_S = 15, op_LD_S = 16, op_LDB_S = 17,
+ op_LDW_S = 18, op_LDWX_S = 19, op_ST_S = 20, op_STB_S = 21,
+ op_STW_S = 22, op_Su5 = 23, op_SP = 24, op_GP = 25,
+ op_Pcl = 26, op_MOV_S = 27, op_ADD_CMP = 28, op_BR_S = 29,
+ op_B_S = 30, op_BL_S = 31
+};
+
+enum flow {
+ noflow,
+ direct_jump,
+ direct_call,
+ indirect_jump,
+ indirect_call,
+ invalid_instr
+};
+
+#define IS_BIT(word, n) ((word) & (1<<n))
+#define BITS(word, s, e) (((word) >> (s)) & (~((-2) << ((e) - (s)))))
+
+#define MAJOR_OPCODE(word) (BITS((word), 27, 31))
+#define MINOR_OPCODE(word) (BITS((word), 16, 21))
+#define FIELD_A(word) (BITS((word), 0, 5))
+#define FIELD_B(word) ((BITS((word), 12, 14)<<3) | \
+ (BITS((word), 24, 26)))
+#define FIELD_C(word) (BITS((word), 6, 11))
+#define FIELD_u6(word) FIELDC(word)
+#define FIELD_s12(word) sign_extend(((BITS((word), 0, 5) << 6) | \
+ BITS((word), 6, 11)), 12)
+
+/* note that for BL/BRcc these two macro's need another AND statement to mask
+ * out bit 1 (make the result a multiple of 4) */
+#define FIELD_s9(word) sign_extend(((BITS(word, 15, 15) << 8) | \
+ BITS(word, 16, 23)), 9)
+#define FIELD_s21(word) sign_extend(((BITS(word, 6, 15) << 11) | \
+ (BITS(word, 17, 26) << 1)), 12)
+#define FIELD_s25(word) sign_extend(((BITS(word, 0, 3) << 21) | \
+ (BITS(word, 6, 15) << 11) | \
+ (BITS(word, 17, 26) << 1)), 12)
+
+/* note: these operate on 16 bits! */
+#define FIELD_S_A(word) ((BITS((word), 2, 2)<<3) | BITS((word), 0, 2))
+#define FIELD_S_B(word) ((BITS((word), 10, 10)<<3) | \
+ BITS((word), 8, 10))
+#define FIELD_S_C(word) ((BITS((word), 7, 7)<<3) | BITS((word), 5, 7))
+#define FIELD_S_H(word) ((BITS((word), 0, 2)<<3) | BITS((word), 5, 8))
+#define FIELD_S_u5(word) (BITS((word), 0, 4))
+#define FIELD_S_u6(word) (BITS((word), 0, 4) << 1)
+#define FIELD_S_u7(word) (BITS((word), 0, 4) << 2)
+#define FIELD_S_u10(word) (BITS((word), 0, 7) << 2)
+#define FIELD_S_s7(word) sign_extend(BITS((word), 0, 5) << 1, 9)
+#define FIELD_S_s8(word) sign_extend(BITS((word), 0, 7) << 1, 9)
+#define FIELD_S_s9(word) sign_extend(BITS((word), 0, 8), 9)
+#define FIELD_S_s10(word) sign_extend(BITS((word), 0, 8) << 1, 10)
+#define FIELD_S_s11(word) sign_extend(BITS((word), 0, 8) << 2, 11)
+#define FIELD_S_s13(word) sign_extend(BITS((word), 0, 10) << 2, 13)
+
+#define STATUS32_L 0x00000100
+#define REG_LIMM 62
+
+struct disasm_state {
+ /* generic info */
+ unsigned long words[2];
+ int instr_len;
+ int major_opcode;
+ /* info for branch/jump */
+ int is_branch;
+ int target;
+ int delay_slot;
+ enum flow flow;
+ /* info for load/store */
+ int src1, src2, src3, dest, wb_reg;
+ int zz, aa, x, pref, di;
+ int fault, write;
+};
+
+static inline int sign_extend(int value, int bits)
+{
+ if (IS_BIT(value, (bits - 1)))
+ value |= (0xffffffff << bits);
+
+ return value;
+}
+
+static inline int is_short_instr(unsigned long addr)
+{
+ uint16_t word = *((uint16_t *)addr);
+ int opcode = (word >> 11) & 0x1F;
+ return (opcode >= 0x0B);
+}
+
+void disasm_instr(unsigned long addr, struct disasm_state *state,
+ int userspace, struct pt_regs *regs, struct callee_regs *cregs);
+int disasm_next_pc(unsigned long pc, struct pt_regs *regs, struct callee_regs
+ *cregs, unsigned long *fall_thru, unsigned long *target);
+long get_reg(int reg, struct pt_regs *regs, struct callee_regs *cregs);
+void set_reg(int reg, long val, struct pt_regs *regs,
+ struct callee_regs *cregs);
+
+#endif /* __ARC_DISASM_H__ */
diff --git a/arch/arc/include/asm/dma.h b/arch/arc/include/asm/dma.h
new file mode 100644
index 000000000..02431027e
--- /dev/null
+++ b/arch/arc/include/asm/dma.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef ASM_ARC_DMA_H
+#define ASM_ARC_DMA_H
+
+#define MAX_DMA_ADDRESS 0xC0000000
+
+#endif
diff --git a/arch/arc/include/asm/dsp-impl.h b/arch/arc/include/asm/dsp-impl.h
new file mode 100644
index 000000000..cd5636dfe
--- /dev/null
+++ b/arch/arc/include/asm/dsp-impl.h
@@ -0,0 +1,152 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2020 Synopsys, Inc. (www.synopsys.com)
+ *
+ * Author: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
+ */
+#ifndef __ASM_ARC_DSP_IMPL_H
+#define __ASM_ARC_DSP_IMPL_H
+
+#include <asm/dsp.h>
+
+#define DSP_CTRL_DISABLED_ALL 0
+
+#ifdef __ASSEMBLY__
+
+/* clobbers r5 register */
+.macro DSP_EARLY_INIT
+#ifdef CONFIG_ISA_ARCV2
+ lr r5, [ARC_AUX_DSP_BUILD]
+ bmsk r5, r5, 7
+ breq r5, 0, 1f
+ mov r5, DSP_CTRL_DISABLED_ALL
+ sr r5, [ARC_AUX_DSP_CTRL]
+1:
+#endif
+.endm
+
+/* clobbers r10, r11 registers pair */
+.macro DSP_SAVE_REGFILE_IRQ
+#if defined(CONFIG_ARC_DSP_KERNEL)
+ /*
+ * Drop any changes to DSP_CTRL made by userspace so userspace won't be
+ * able to break kernel - reset it to DSP_CTRL_DISABLED_ALL value
+ */
+ mov r10, DSP_CTRL_DISABLED_ALL
+ sr r10, [ARC_AUX_DSP_CTRL]
+
+#elif defined(CONFIG_ARC_DSP_SAVE_RESTORE_REGS)
+ /*
+ * Save DSP_CTRL register and reset it to value suitable for kernel
+ * (DSP_CTRL_DISABLED_ALL)
+ */
+ mov r10, DSP_CTRL_DISABLED_ALL
+ aex r10, [ARC_AUX_DSP_CTRL]
+ st r10, [sp, PT_DSP_CTRL]
+
+#endif
+.endm
+
+/* clobbers r10, r11 registers pair */
+.macro DSP_RESTORE_REGFILE_IRQ
+#if defined(CONFIG_ARC_DSP_SAVE_RESTORE_REGS)
+ ld r10, [sp, PT_DSP_CTRL]
+ sr r10, [ARC_AUX_DSP_CTRL]
+
+#endif
+.endm
+
+#else /* __ASEMBLY__ */
+
+#include <linux/sched.h>
+#include <asm/asserts.h>
+#include <asm/switch_to.h>
+
+#ifdef CONFIG_ARC_DSP_SAVE_RESTORE_REGS
+
+/*
+ * As we save new and restore old AUX register value in the same place we
+ * can optimize a bit and use AEX instruction (swap contents of an auxiliary
+ * register with a core register) instead of LR + SR pair.
+ */
+#define AUX_SAVE_RESTORE(_saveto, _readfrom, _offt, _aux) \
+do { \
+ long unsigned int _scratch; \
+ \
+ __asm__ __volatile__( \
+ "ld %0, [%2, %4] \n" \
+ "aex %0, [%3] \n" \
+ "st %0, [%1, %4] \n" \
+ : \
+ "=&r" (_scratch) /* must be early clobber */ \
+ : \
+ "r" (_saveto), \
+ "r" (_readfrom), \
+ "Ir" (_aux), \
+ "Ir" (_offt) \
+ : \
+ "memory" \
+ ); \
+} while (0)
+
+#define DSP_AUX_SAVE_RESTORE(_saveto, _readfrom, _aux) \
+ AUX_SAVE_RESTORE(_saveto, _readfrom, \
+ offsetof(struct dsp_callee_regs, _aux), \
+ ARC_AUX_##_aux)
+
+static inline void dsp_save_restore(struct task_struct *prev,
+ struct task_struct *next)
+{
+ long unsigned int *saveto = &prev->thread.dsp.ACC0_GLO;
+ long unsigned int *readfrom = &next->thread.dsp.ACC0_GLO;
+
+ DSP_AUX_SAVE_RESTORE(saveto, readfrom, ACC0_GLO);
+ DSP_AUX_SAVE_RESTORE(saveto, readfrom, ACC0_GHI);
+
+ DSP_AUX_SAVE_RESTORE(saveto, readfrom, DSP_BFLY0);
+ DSP_AUX_SAVE_RESTORE(saveto, readfrom, DSP_FFT_CTRL);
+
+#ifdef CONFIG_ARC_DSP_AGU_USERSPACE
+ DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_AP0);
+ DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_AP1);
+ DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_AP2);
+ DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_AP3);
+
+ DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_OS0);
+ DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_OS1);
+
+ DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_MOD0);
+ DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_MOD1);
+ DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_MOD2);
+ DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_MOD3);
+#endif /* CONFIG_ARC_DSP_AGU_USERSPACE */
+}
+
+#else /* !CONFIG_ARC_DSP_SAVE_RESTORE_REGS */
+#define dsp_save_restore(p, n)
+#endif /* CONFIG_ARC_DSP_SAVE_RESTORE_REGS */
+
+static inline bool dsp_exist(void)
+{
+ struct bcr_generic bcr;
+
+ READ_BCR(ARC_AUX_DSP_BUILD, bcr);
+ return !!bcr.ver;
+}
+
+static inline bool agu_exist(void)
+{
+ struct bcr_generic bcr;
+
+ READ_BCR(ARC_AUX_AGU_BUILD, bcr);
+ return !!bcr.ver;
+}
+
+static inline void dsp_config_check(void)
+{
+ CHK_OPT_STRICT(CONFIG_ARC_DSP_HANDLED, dsp_exist());
+ CHK_OPT_WEAK(CONFIG_ARC_DSP_AGU_USERSPACE, agu_exist());
+}
+
+#endif /* __ASEMBLY__ */
+#endif /* __ASM_ARC_DSP_IMPL_H */
diff --git a/arch/arc/include/asm/dsp.h b/arch/arc/include/asm/dsp.h
new file mode 100644
index 000000000..202c78e56
--- /dev/null
+++ b/arch/arc/include/asm/dsp.h
@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2020 Synopsys, Inc. (www.synopsys.com)
+ *
+ * Author: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
+ */
+#ifndef __ASM_ARC_DSP_H
+#define __ASM_ARC_DSP_H
+
+#ifndef __ASSEMBLY__
+
+/*
+ * DSP-related saved registers - need to be saved only when you are
+ * scheduled out.
+ * structure fields name must correspond to aux register defenitions for
+ * automatic offset calculation in DSP_AUX_SAVE_RESTORE macros
+ */
+struct dsp_callee_regs {
+ unsigned long ACC0_GLO, ACC0_GHI, DSP_BFLY0, DSP_FFT_CTRL;
+#ifdef CONFIG_ARC_DSP_AGU_USERSPACE
+ unsigned long AGU_AP0, AGU_AP1, AGU_AP2, AGU_AP3;
+ unsigned long AGU_OS0, AGU_OS1;
+ unsigned long AGU_MOD0, AGU_MOD1, AGU_MOD2, AGU_MOD3;
+#endif
+};
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* __ASM_ARC_DSP_H */
diff --git a/arch/arc/include/asm/dwarf.h b/arch/arc/include/asm/dwarf.h
new file mode 100644
index 000000000..5f4de05bd
--- /dev/null
+++ b/arch/arc/include/asm/dwarf.h
@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2016-17 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef _ASM_ARC_DWARF_H
+#define _ASM_ARC_DWARF_H
+
+#ifdef __ASSEMBLY__
+
+#ifdef ARC_DW2_UNWIND_AS_CFI
+
+#define CFI_STARTPROC .cfi_startproc
+#define CFI_ENDPROC .cfi_endproc
+#define CFI_DEF_CFA .cfi_def_cfa
+#define CFI_REGISTER .cfi_register
+#define CFI_REL_OFFSET .cfi_rel_offset
+#define CFI_UNDEFINED .cfi_undefined
+
+#else
+
+#define CFI_IGNORE #
+
+#define CFI_STARTPROC CFI_IGNORE
+#define CFI_ENDPROC CFI_IGNORE
+#define CFI_DEF_CFA CFI_IGNORE
+#define CFI_REGISTER CFI_IGNORE
+#define CFI_REL_OFFSET CFI_IGNORE
+#define CFI_UNDEFINED CFI_IGNORE
+
+#endif /* !ARC_DW2_UNWIND_AS_CFI */
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* _ASM_ARC_DWARF_H */
diff --git a/arch/arc/include/asm/elf.h b/arch/arc/include/asm/elf.h
new file mode 100644
index 000000000..0284ace0e
--- /dev/null
+++ b/arch/arc/include/asm/elf.h
@@ -0,0 +1,72 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef __ASM_ARC_ELF_H
+#define __ASM_ARC_ELF_H
+
+#include <linux/types.h>
+#include <linux/elf-em.h>
+#include <uapi/asm/elf.h>
+
+#define EM_ARC_INUSE (IS_ENABLED(CONFIG_ISA_ARCOMPACT) ? \
+ EM_ARCOMPACT : EM_ARCV2)
+
+/* ARC Relocations (kernel Modules only) */
+#define R_ARC_32 0x4
+#define R_ARC_32_ME 0x1B
+#define R_ARC_32_PCREL 0x31
+
+/*to set parameters in the core dumps */
+#define ELF_ARCH EM_ARC_INUSE
+#define ELF_CLASS ELFCLASS32
+
+#ifdef CONFIG_CPU_BIG_ENDIAN
+#define ELF_DATA ELFDATA2MSB
+#else
+#define ELF_DATA ELFDATA2LSB
+#endif
+
+/*
+ * To ensure that
+ * -we don't load something for the wrong architecture.
+ * -The userspace is using the correct syscall ABI
+ */
+struct elf32_hdr;
+extern int elf_check_arch(const struct elf32_hdr *);
+#define elf_check_arch elf_check_arch
+
+#define CORE_DUMP_USE_REGSET
+
+#define ELF_EXEC_PAGESIZE PAGE_SIZE
+
+/*
+ * This is the location that an ET_DYN program is loaded if exec'ed. Typical
+ * use of this is to invoke "./ld.so someprog" to test out a new version of
+ * the loader. We need to make sure that it is out of the way of the program
+ * that it will "exec", and that there is sufficient room for the brk.
+ */
+#define ELF_ET_DYN_BASE (2UL * TASK_SIZE / 3)
+
+/*
+ * When the program starts, a1 contains a pointer to a function to be
+ * registered with atexit, as per the SVR4 ABI. A value of 0 means we
+ * have no such handler.
+ */
+#define ELF_PLAT_INIT(_r, load_addr) ((_r)->r0 = 0)
+
+/*
+ * This yields a mask that user programs can use to figure out what
+ * instruction set this cpu supports.
+ */
+#define ELF_HWCAP (0)
+
+/*
+ * This yields a string that ld.so will use to load implementation
+ * specific libraries for optimization. This is more specific in
+ * intent than poking at uname or /proc/cpuinfo.
+ */
+#define ELF_PLATFORM (NULL)
+
+#endif
diff --git a/arch/arc/include/asm/entry-arcv2.h b/arch/arc/include/asm/entry-arcv2.h
new file mode 100644
index 000000000..0ff4c0610
--- /dev/null
+++ b/arch/arc/include/asm/entry-arcv2.h
@@ -0,0 +1,284 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __ASM_ARC_ENTRY_ARCV2_H
+#define __ASM_ARC_ENTRY_ARCV2_H
+
+#include <asm/asm-offsets.h>
+#include <asm/dsp-impl.h>
+#include <asm/irqflags-arcv2.h>
+#include <asm/thread_info.h> /* For THREAD_SIZE */
+
+/*
+ * Interrupt/Exception stack layout (pt_regs) for ARCv2
+ * (End of struct aligned to end of page [unless nested])
+ *
+ * INTERRUPT EXCEPTION
+ *
+ * manual --------------------- manual
+ * | orig_r0 |
+ * | event/ECR |
+ * | bta |
+ * | user_r25 |
+ * | gp |
+ * | fp |
+ * | sp |
+ * | r12 |
+ * | r30 |
+ * | r58 |
+ * | r59 |
+ * hw autosave ---------------------
+ * optional | r0 |
+ * | r1 |
+ * ~ ~
+ * | r9 |
+ * | r10 |
+ * | r11 |
+ * | blink |
+ * | lpe |
+ * | lps |
+ * | lpc |
+ * | ei base |
+ * | ldi base |
+ * | jli base |
+ * ---------------------
+ * hw autosave | pc / eret |
+ * mandatory | stat32 / erstatus |
+ * ---------------------
+ */
+
+/*------------------------------------------------------------------------*/
+.macro INTERRUPT_PROLOGUE
+
+ ; (A) Before jumping to Interrupt Vector, hardware micro-ops did following:
+ ; 1. SP auto-switched to kernel mode stack
+ ; 2. STATUS32.Z flag set if in U mode at time of interrupt (U:1,K:0)
+ ; 3. Auto save: (mandatory) Push PC and STAT32 on stack
+ ; hardware does even if CONFIG_ARC_IRQ_NO_AUTOSAVE
+ ; 4. Auto save: (optional) r0-r11, blink, LPE,LPS,LPC, JLI,LDI,EI
+ ;
+ ; (B) Manually saved some regs: r12,r25,r30, sp,fp,gp, ACCL pair
+
+#ifdef CONFIG_ARC_IRQ_NO_AUTOSAVE
+ ; carve pt_regs on stack (case #3), PC/STAT32 already on stack
+ sub sp, sp, SZ_PT_REGS - 8
+
+ __SAVE_REGFILE_HARD
+#else
+ ; carve pt_regs on stack (case #4), which grew partially already
+ sub sp, sp, PT_r0
+#endif
+
+ __SAVE_REGFILE_SOFT
+.endm
+
+/*------------------------------------------------------------------------*/
+.macro EXCEPTION_PROLOGUE
+
+ ; (A) Before jumping to Exception Vector, hardware micro-ops did following:
+ ; 1. SP auto-switched to kernel mode stack
+ ; 2. STATUS32.Z flag set if in U mode at time of exception (U:1,K:0)
+ ;
+ ; (B) Manually save the complete reg file below
+
+ sub sp, sp, SZ_PT_REGS ; carve pt_regs
+
+ ; _HARD saves r10 clobbered by _SOFT as scratch hence comes first
+
+ __SAVE_REGFILE_HARD
+ __SAVE_REGFILE_SOFT
+
+ st r0, [sp] ; orig_r0
+
+ lr r10, [eret]
+ lr r11, [erstatus]
+ ST2 r10, r11, PT_ret
+
+ lr r10, [ecr]
+ lr r11, [erbta]
+ ST2 r10, r11, PT_event
+
+ ; OUTPUT: r10 has ECR expected by EV_Trap
+.endm
+
+/*------------------------------------------------------------------------
+ * This macro saves the registers manually which would normally be autosaved
+ * by hardware on taken interrupts. It is used by
+ * - exception handlers (which don't have autosave)
+ * - interrupt autosave disabled due to CONFIG_ARC_IRQ_NO_AUTOSAVE
+ */
+.macro __SAVE_REGFILE_HARD
+
+ ST2 r0, r1, PT_r0
+ ST2 r2, r3, PT_r2
+ ST2 r4, r5, PT_r4
+ ST2 r6, r7, PT_r6
+ ST2 r8, r9, PT_r8
+ ST2 r10, r11, PT_r10
+
+ st blink, [sp, PT_blink]
+
+ lr r10, [lp_end]
+ lr r11, [lp_start]
+ ST2 r10, r11, PT_lpe
+
+ st lp_count, [sp, PT_lpc]
+
+ ; skip JLI, LDI, EI for now
+.endm
+
+/*------------------------------------------------------------------------
+ * This macros saves a bunch of other registers which can't be autosaved for
+ * various reasons:
+ * - r12: the last caller saved scratch reg since hardware saves in pairs so r0-r11
+ * - r30: free reg, used by gcc as scratch
+ * - ACCL/ACCH pair when they exist
+ */
+.macro __SAVE_REGFILE_SOFT
+
+ ST2 gp, fp, PT_r26 ; gp (r26), fp (r27)
+
+ st r12, [sp, PT_sp + 4]
+ st r30, [sp, PT_sp + 8]
+
+ ; Saving pt_regs->sp correctly requires some extra work due to the way
+ ; Auto stack switch works
+ ; - U mode: retrieve it from AUX_USER_SP
+ ; - K mode: add the offset from current SP where H/w starts auto push
+ ;
+ ; 1. Utilize the fact that Z bit is set if Intr taken in U mode
+ ; 2. Upon entry SP is always saved (for any inspection, unwinding etc),
+ ; but on return, restored only if U mode
+
+ lr r10, [AUX_USER_SP] ; U mode SP
+
+ ; ISA requires ADD.nz to have same dest and src reg operands
+ mov.nz r10, sp
+ add.nz r10, r10, SZ_PT_REGS ; K mode SP
+
+ st r10, [sp, PT_sp] ; SP (pt_regs->sp)
+
+#ifdef CONFIG_ARC_CURR_IN_REG
+ st r25, [sp, PT_user_r25]
+ GET_CURR_TASK_ON_CPU r25
+#endif
+
+#ifdef CONFIG_ARC_HAS_ACCL_REGS
+ ST2 r58, r59, PT_r58
+#endif
+
+ /* clobbers r10, r11 registers pair */
+ DSP_SAVE_REGFILE_IRQ
+.endm
+
+/*------------------------------------------------------------------------*/
+.macro __RESTORE_REGFILE_SOFT
+
+ LD2 gp, fp, PT_r26 ; gp (r26), fp (r27)
+
+ ld r12, [sp, PT_r12]
+ ld r30, [sp, PT_r30]
+
+ ; Restore SP (into AUX_USER_SP) only if returning to U mode
+ ; - for K mode, it will be implicitly restored as stack is unwound
+ ; - Z flag set on K is inverse of what hardware does on interrupt entry
+ ; but that doesn't really matter
+ bz 1f
+
+ ld r10, [sp, PT_sp] ; SP (pt_regs->sp)
+ sr r10, [AUX_USER_SP]
+1:
+
+#ifdef CONFIG_ARC_CURR_IN_REG
+ ld r25, [sp, PT_user_r25]
+#endif
+
+ /* clobbers r10, r11 registers pair */
+ DSP_RESTORE_REGFILE_IRQ
+
+#ifdef CONFIG_ARC_HAS_ACCL_REGS
+ LD2 r58, r59, PT_r58
+#endif
+.endm
+
+/*------------------------------------------------------------------------*/
+.macro __RESTORE_REGFILE_HARD
+
+ ld blink, [sp, PT_blink]
+
+ LD2 r10, r11, PT_lpe
+ sr r10, [lp_end]
+ sr r11, [lp_start]
+
+ ld r10, [sp, PT_lpc] ; lp_count can't be target of LD
+ mov lp_count, r10
+
+ LD2 r0, r1, PT_r0
+ LD2 r2, r3, PT_r2
+ LD2 r4, r5, PT_r4
+ LD2 r6, r7, PT_r6
+ LD2 r8, r9, PT_r8
+ LD2 r10, r11, PT_r10
+.endm
+
+
+/*------------------------------------------------------------------------*/
+.macro INTERRUPT_EPILOGUE
+
+ ; INPUT: r0 has STAT32 of calling context
+ ; INPUT: Z flag set if returning to K mode
+
+ ; _SOFT clobbers r10 restored by _HARD hence the order
+
+ __RESTORE_REGFILE_SOFT
+
+#ifdef CONFIG_ARC_IRQ_NO_AUTOSAVE
+ __RESTORE_REGFILE_HARD
+
+ ; SP points to PC/STAT32: hw restores them despite NO_AUTOSAVE
+ add sp, sp, SZ_PT_REGS - 8
+#else
+ add sp, sp, PT_r0
+#endif
+
+.endm
+
+/*------------------------------------------------------------------------*/
+.macro EXCEPTION_EPILOGUE
+
+ ; INPUT: r0 has STAT32 of calling context
+
+ btst r0, STATUS_U_BIT ; Z flag set if K, used in restoring SP
+
+ ld r10, [sp, PT_event + 4]
+ sr r10, [erbta]
+
+ LD2 r10, r11, PT_ret
+ sr r10, [eret]
+ sr r11, [erstatus]
+
+ __RESTORE_REGFILE_SOFT
+ __RESTORE_REGFILE_HARD
+
+ add sp, sp, SZ_PT_REGS
+.endm
+
+.macro FAKE_RET_FROM_EXCPN
+ lr r9, [status32]
+ bic r9, r9, STATUS_AE_MASK
+ or r9, r9, STATUS_IE_MASK
+ kflag r9
+.endm
+
+/* Get thread_info of "current" tsk */
+.macro GET_CURR_THR_INFO_FROM_SP reg
+ bmskn \reg, sp, THREAD_SHIFT - 1
+.endm
+
+/* Get CPU-ID of this core */
+.macro GET_CPU_ID reg
+ lr \reg, [identity]
+ xbfu \reg, \reg, 0xE8 /* 00111 01000 */
+ /* M = 8-1 N = 8 */
+.endm
+
+#endif
diff --git a/arch/arc/include/asm/entry-compact.h b/arch/arc/include/asm/entry-compact.h
new file mode 100644
index 000000000..67ff06e15
--- /dev/null
+++ b/arch/arc/include/asm/entry-compact.h
@@ -0,0 +1,304 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * Vineetg: March 2009 (Supporting 2 levels of Interrupts)
+ * Stack switching code can no longer reliably rely on the fact that
+ * if we are NOT in user mode, stack is switched to kernel mode.
+ * e.g. L2 IRQ interrupted a L1 ISR which had not yet completed
+ * it's prologue including stack switching from user mode
+ *
+ * Vineetg: Aug 28th 2008: Bug #94984
+ * -Zero Overhead Loop Context shd be cleared when entering IRQ/EXcp/Trap
+ * Normally CPU does this automatically, however when doing FAKE rtie,
+ * we also need to explicitly do this. The problem in macros
+ * FAKE_RET_FROM_EXCPN and FAKE_RET_FROM_EXCPN_LOCK_IRQ was that this bit
+ * was being "CLEARED" rather then "SET". Actually "SET" clears ZOL context
+ *
+ * Vineetg: May 5th 2008
+ * -Modified CALLEE_REG save/restore macros to handle the fact that
+ * r25 contains the kernel current task ptr
+ * - Defined Stack Switching Macro to be reused in all intr/excp hdlrs
+ * - Shaved off 11 instructions from RESTORE_ALL_INT1 by using the
+ * address Write back load ld.ab instead of separate ld/add instn
+ *
+ * Amit Bhor, Sameer Dhavale: Codito Technologies 2004
+ */
+
+#ifndef __ASM_ARC_ENTRY_COMPACT_H
+#define __ASM_ARC_ENTRY_COMPACT_H
+
+#include <asm/asm-offsets.h>
+#include <asm/irqflags-compact.h>
+#include <asm/thread_info.h> /* For THREAD_SIZE */
+
+/*--------------------------------------------------------------
+ * Switch to Kernel Mode stack if SP points to User Mode stack
+ *
+ * Entry : r9 contains pre-IRQ/exception/trap status32
+ * Exit : SP set to K mode stack
+ * SP at the time of entry (K/U) saved @ pt_regs->sp
+ * Clobbers: r9
+ *-------------------------------------------------------------*/
+
+.macro SWITCH_TO_KERNEL_STK
+
+ /* User Mode when this happened ? Yes: Proceed to switch stack */
+ bbit1 r9, STATUS_U_BIT, 88f
+
+ /* OK we were already in kernel mode when this event happened, thus can
+ * assume SP is kernel mode SP. _NO_ need to do any stack switching
+ */
+
+#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS
+ /* However....
+ * If Level 2 Interrupts enabled, we may end up with a corner case:
+ * 1. User Task executing
+ * 2. L1 IRQ taken, ISR starts (CPU auto-switched to KERNEL mode)
+ * 3. But before it could switch SP from USER to KERNEL stack
+ * a L2 IRQ "Interrupts" L1
+ * Thay way although L2 IRQ happened in Kernel mode, stack is still
+ * not switched.
+ * To handle this, we may need to switch stack even if in kernel mode
+ * provided SP has values in range of USER mode stack ( < 0x7000_0000 )
+ */
+ brlo sp, VMALLOC_START, 88f
+
+ /* TODO: vineetg:
+ * We need to be a bit more cautious here. What if a kernel bug in
+ * L1 ISR, caused SP to go whaco (some small value which looks like
+ * USER stk) and then we take L2 ISR.
+ * Above brlo alone would treat it as a valid L1-L2 scenario
+ * instead of shouting around
+ * The only feasible way is to make sure this L2 happened in
+ * L1 prelogue ONLY i.e. ilink2 is less than a pre-set marker in
+ * L1 ISR before it switches stack
+ */
+
+#endif
+
+ /*------Intr/Ecxp happened in kernel mode, SP already setup ------ */
+ /* save it nevertheless @ pt_regs->sp for uniformity */
+
+ b.d 66f
+ st sp, [sp, PT_sp - SZ_PT_REGS]
+
+88: /*------Intr/Ecxp happened in user mode, "switch" stack ------ */
+
+ GET_CURR_TASK_ON_CPU r9
+
+ /* With current tsk in r9, get it's kernel mode stack base */
+ GET_TSK_STACK_BASE r9, r9
+
+ /* save U mode SP @ pt_regs->sp */
+ st sp, [r9, PT_sp - SZ_PT_REGS]
+
+ /* final SP switch */
+ mov sp, r9
+66:
+.endm
+
+/*------------------------------------------------------------
+ * "FAKE" a rtie to return from CPU Exception context
+ * This is to re-enable Exceptions within exception
+ * Look at EV_ProtV to see how this is actually used
+ *-------------------------------------------------------------*/
+
+.macro FAKE_RET_FROM_EXCPN
+
+ lr r9, [status32]
+ bclr r9, r9, STATUS_AE_BIT
+ or r9, r9, (STATUS_E1_MASK|STATUS_E2_MASK)
+ sr r9, [erstatus]
+ mov r9, 55f
+ sr r9, [eret]
+ rtie
+55:
+.endm
+
+/*--------------------------------------------------------------
+ * For early Exception/ISR Prologue, a core reg is temporarily needed to
+ * code the rest of prolog (stack switching). This is done by stashing
+ * it to memory (non-SMP case) or SCRATCH0 Aux Reg (SMP).
+ *
+ * Before saving the full regfile - this reg is restored back, only
+ * to be saved again on kernel mode stack, as part of pt_regs.
+ *-------------------------------------------------------------*/
+.macro PROLOG_FREEUP_REG reg, mem
+ st \reg, [\mem]
+.endm
+
+.macro PROLOG_RESTORE_REG reg, mem
+ ld \reg, [\mem]
+.endm
+
+/*--------------------------------------------------------------
+ * Exception Entry prologue
+ * -Switches stack to K mode (if not already)
+ * -Saves the register file
+ *
+ * After this it is safe to call the "C" handlers
+ *-------------------------------------------------------------*/
+.macro EXCEPTION_PROLOGUE
+
+ /* Need at least 1 reg to code the early exception prologue */
+ PROLOG_FREEUP_REG r9, @ex_saved_reg1
+
+ /* U/K mode at time of exception (stack not switched if already K) */
+ lr r9, [erstatus]
+
+ /* ARC700 doesn't provide auto-stack switching */
+ SWITCH_TO_KERNEL_STK
+
+#ifdef CONFIG_ARC_CURR_IN_REG
+ /* Treat r25 as scratch reg (save on stack) and load with "current" */
+ PUSH r25
+ GET_CURR_TASK_ON_CPU r25
+#else
+ sub sp, sp, 4
+#endif
+
+ st.a r0, [sp, -8] /* orig_r0 needed for syscall (skip ECR slot) */
+ sub sp, sp, 4 /* skip pt_regs->sp, already saved above */
+
+ /* Restore r9 used to code the early prologue */
+ PROLOG_RESTORE_REG r9, @ex_saved_reg1
+
+ /* now we are ready to save the regfile */
+ SAVE_R0_TO_R12
+ PUSH gp
+ PUSH fp
+ PUSH blink
+ PUSHAX eret
+ PUSHAX erstatus
+ PUSH lp_count
+ PUSHAX lp_end
+ PUSHAX lp_start
+ PUSHAX erbta
+
+ lr r10, [ecr]
+ st r10, [sp, PT_event] /* EV_Trap expects r10 to have ECR */
+.endm
+
+/*--------------------------------------------------------------
+ * Restore all registers used by system call or Exceptions
+ * SP should always be pointing to the next free stack element
+ * when entering this macro.
+ *
+ * NOTE:
+ *
+ * It is recommended that lp_count/ilink1/ilink2 not be used as a dest reg
+ * for memory load operations. If used in that way interrupts are deffered
+ * by hardware and that is not good.
+ *-------------------------------------------------------------*/
+.macro EXCEPTION_EPILOGUE
+
+ POPAX erbta
+ POPAX lp_start
+ POPAX lp_end
+
+ POP r9
+ mov lp_count, r9 ;LD to lp_count is not allowed
+
+ POPAX erstatus
+ POPAX eret
+ POP blink
+ POP fp
+ POP gp
+ RESTORE_R12_TO_R0
+
+#ifdef CONFIG_ARC_CURR_IN_REG
+ ld r25, [sp, 12]
+#endif
+ ld sp, [sp] /* restore original sp */
+ /* orig_r0, ECR, user_r25 skipped automatically */
+.endm
+
+/* Dummy ECR values for Interrupts */
+#define event_IRQ1 0x0031abcd
+#define event_IRQ2 0x0032abcd
+
+.macro INTERRUPT_PROLOGUE LVL
+
+ /* free up r9 as scratchpad */
+ PROLOG_FREEUP_REG r9, @int\LVL\()_saved_reg
+
+ /* Which mode (user/kernel) was the system in when intr occurred */
+ lr r9, [status32_l\LVL\()]
+
+ SWITCH_TO_KERNEL_STK
+
+#ifdef CONFIG_ARC_CURR_IN_REG
+ /* Treat r25 as scratch reg (save on stack) and load with "current" */
+ PUSH r25
+ GET_CURR_TASK_ON_CPU r25
+#else
+ sub sp, sp, 4
+#endif
+
+ PUSH 0x003\LVL\()abcd /* Dummy ECR */
+ sub sp, sp, 8 /* skip orig_r0 (not needed)
+ skip pt_regs->sp, already saved above */
+
+ /* Restore r9 used to code the early prologue */
+ PROLOG_RESTORE_REG r9, @int\LVL\()_saved_reg
+
+ SAVE_R0_TO_R12
+ PUSH gp
+ PUSH fp
+ PUSH blink
+ PUSH ilink\LVL\()
+ PUSHAX status32_l\LVL\()
+ PUSH lp_count
+ PUSHAX lp_end
+ PUSHAX lp_start
+ PUSHAX bta_l\LVL\()
+
+.endm
+
+/*--------------------------------------------------------------
+ * Restore all registers used by interrupt handlers.
+ *
+ * NOTE:
+ *
+ * It is recommended that lp_count/ilink1/ilink2 not be used as a dest reg
+ * for memory load operations. If used in that way interrupts are deffered
+ * by hardware and that is not good.
+ *-------------------------------------------------------------*/
+.macro INTERRUPT_EPILOGUE LVL
+
+ POPAX bta_l\LVL\()
+ POPAX lp_start
+ POPAX lp_end
+
+ POP r9
+ mov lp_count, r9 ;LD to lp_count is not allowed
+
+ POPAX status32_l\LVL\()
+ POP ilink\LVL\()
+ POP blink
+ POP fp
+ POP gp
+ RESTORE_R12_TO_R0
+
+#ifdef CONFIG_ARC_CURR_IN_REG
+ ld r25, [sp, 12]
+#endif
+ ld sp, [sp] /* restore original sp */
+ /* orig_r0, ECR, user_r25 skipped automatically */
+.endm
+
+/* Get thread_info of "current" tsk */
+.macro GET_CURR_THR_INFO_FROM_SP reg
+ bic \reg, sp, (THREAD_SIZE - 1)
+.endm
+
+/* Get CPU-ID of this core */
+.macro GET_CPU_ID reg
+ lr \reg, [identity]
+ lsr \reg, \reg, 8
+ bmsk \reg, \reg, 7
+.endm
+
+#endif /* __ASM_ARC_ENTRY_COMPACT_H */
diff --git a/arch/arc/include/asm/entry.h b/arch/arc/include/asm/entry.h
new file mode 100644
index 000000000..fcdd59d77
--- /dev/null
+++ b/arch/arc/include/asm/entry.h
@@ -0,0 +1,298 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef __ASM_ARC_ENTRY_H
+#define __ASM_ARC_ENTRY_H
+
+#include <asm/unistd.h> /* For NR_syscalls defination */
+#include <asm/arcregs.h>
+#include <asm/ptrace.h>
+#include <asm/processor.h> /* For VMALLOC_START */
+#include <asm/mmu.h>
+
+#ifdef CONFIG_ISA_ARCOMPACT
+#include <asm/entry-compact.h> /* ISA specific bits */
+#else
+#include <asm/entry-arcv2.h>
+#endif
+
+/* Note on the LD/ST addr modes with addr reg wback
+ *
+ * LD.a same as LD.aw
+ *
+ * LD.a reg1, [reg2, x] => Pre Incr
+ * Eff Addr for load = [reg2 + x]
+ *
+ * LD.ab reg1, [reg2, x] => Post Incr
+ * Eff Addr for load = [reg2]
+ */
+
+.macro PUSH reg
+ st.a \reg, [sp, -4]
+.endm
+
+.macro PUSHAX aux
+ lr r9, [\aux]
+ PUSH r9
+.endm
+
+.macro POP reg
+ ld.ab \reg, [sp, 4]
+.endm
+
+.macro POPAX aux
+ POP r9
+ sr r9, [\aux]
+.endm
+
+/*--------------------------------------------------------------
+ * Helpers to save/restore Scratch Regs:
+ * used by Interrupt/Exception Prologue/Epilogue
+ *-------------------------------------------------------------*/
+.macro SAVE_R0_TO_R12
+ PUSH r0
+ PUSH r1
+ PUSH r2
+ PUSH r3
+ PUSH r4
+ PUSH r5
+ PUSH r6
+ PUSH r7
+ PUSH r8
+ PUSH r9
+ PUSH r10
+ PUSH r11
+ PUSH r12
+.endm
+
+.macro RESTORE_R12_TO_R0
+ POP r12
+ POP r11
+ POP r10
+ POP r9
+ POP r8
+ POP r7
+ POP r6
+ POP r5
+ POP r4
+ POP r3
+ POP r2
+ POP r1
+ POP r0
+
+.endm
+
+/*--------------------------------------------------------------
+ * Helpers to save/restore callee-saved regs:
+ * used by several macros below
+ *-------------------------------------------------------------*/
+.macro SAVE_R13_TO_R24
+ PUSH r13
+ PUSH r14
+ PUSH r15
+ PUSH r16
+ PUSH r17
+ PUSH r18
+ PUSH r19
+ PUSH r20
+ PUSH r21
+ PUSH r22
+ PUSH r23
+ PUSH r24
+.endm
+
+.macro RESTORE_R24_TO_R13
+ POP r24
+ POP r23
+ POP r22
+ POP r21
+ POP r20
+ POP r19
+ POP r18
+ POP r17
+ POP r16
+ POP r15
+ POP r14
+ POP r13
+.endm
+
+/*--------------------------------------------------------------
+ * Collect User Mode callee regs as struct callee_regs - needed by
+ * fork/do_signal/unaligned-access-emulation.
+ * (By default only scratch regs are saved on entry to kernel)
+ *
+ * Special handling for r25 if used for caching Task Pointer.
+ * It would have been saved in task->thread.user_r25 already, but to keep
+ * the interface same it is copied into regular r25 placeholder in
+ * struct callee_regs.
+ *-------------------------------------------------------------*/
+.macro SAVE_CALLEE_SAVED_USER
+
+ mov r12, sp ; save SP as ref to pt_regs
+ SAVE_R13_TO_R24
+
+#ifdef CONFIG_ARC_CURR_IN_REG
+ ; Retrieve orig r25 and save it with rest of callee_regs
+ ld r12, [r12, PT_user_r25]
+ PUSH r12
+#else
+ PUSH r25
+#endif
+
+.endm
+
+/*--------------------------------------------------------------
+ * Save kernel Mode callee regs at the time of Contect Switch.
+ *
+ * Special handling for r25 if used for caching Task Pointer.
+ * Kernel simply skips saving it since it will be loaded with
+ * incoming task pointer anyways
+ *-------------------------------------------------------------*/
+.macro SAVE_CALLEE_SAVED_KERNEL
+
+ SAVE_R13_TO_R24
+
+#ifdef CONFIG_ARC_CURR_IN_REG
+ sub sp, sp, 4
+#else
+ PUSH r25
+#endif
+.endm
+
+/*--------------------------------------------------------------
+ * Opposite of SAVE_CALLEE_SAVED_KERNEL
+ *-------------------------------------------------------------*/
+.macro RESTORE_CALLEE_SAVED_KERNEL
+
+#ifdef CONFIG_ARC_CURR_IN_REG
+ add sp, sp, 4 /* skip usual r25 placeholder */
+#else
+ POP r25
+#endif
+ RESTORE_R24_TO_R13
+.endm
+
+/*--------------------------------------------------------------
+ * Opposite of SAVE_CALLEE_SAVED_USER
+ *
+ * ptrace tracer or unaligned-access fixup might have changed a user mode
+ * callee reg which is saved back to usual r25 storage location
+ *-------------------------------------------------------------*/
+.macro RESTORE_CALLEE_SAVED_USER
+
+#ifdef CONFIG_ARC_CURR_IN_REG
+ POP r12
+#else
+ POP r25
+#endif
+ RESTORE_R24_TO_R13
+
+ ; SP is back to start of pt_regs
+#ifdef CONFIG_ARC_CURR_IN_REG
+ st r12, [sp, PT_user_r25]
+#endif
+.endm
+
+/*--------------------------------------------------------------
+ * Super FAST Restore callee saved regs by simply re-adjusting SP
+ *-------------------------------------------------------------*/
+.macro DISCARD_CALLEE_SAVED_USER
+ add sp, sp, SZ_CALLEE_REGS
+.endm
+
+/*-------------------------------------------------------------
+ * given a tsk struct, get to the base of it's kernel mode stack
+ * tsk->thread_info is really a PAGE, whose bottom hoists stack
+ * which grows upwards towards thread_info
+ *------------------------------------------------------------*/
+
+.macro GET_TSK_STACK_BASE tsk, out
+
+ /* Get task->thread_info (this is essentially start of a PAGE) */
+ ld \out, [\tsk, TASK_THREAD_INFO]
+
+ /* Go to end of page where stack begins (grows upwards) */
+ add2 \out, \out, (THREAD_SIZE)/4
+
+.endm
+
+/*
+ * @reg [OUT] thread_info->flags of "current"
+ */
+.macro GET_CURR_THR_INFO_FLAGS reg
+ GET_CURR_THR_INFO_FROM_SP \reg
+ ld \reg, [\reg, THREAD_INFO_FLAGS]
+.endm
+
+#ifdef CONFIG_SMP
+
+/*-------------------------------------------------
+ * Retrieve the current running task on this CPU
+ * 1. Determine curr CPU id.
+ * 2. Use it to index into _current_task[ ]
+ */
+.macro GET_CURR_TASK_ON_CPU reg
+ GET_CPU_ID \reg
+ ld.as \reg, [@_current_task, \reg]
+.endm
+
+/*-------------------------------------------------
+ * Save a new task as the "current" task on this CPU
+ * 1. Determine curr CPU id.
+ * 2. Use it to index into _current_task[ ]
+ *
+ * Coded differently than GET_CURR_TASK_ON_CPU (which uses LD.AS)
+ * because ST r0, [r1, offset] can ONLY have s9 @offset
+ * while LD can take s9 (4 byte insn) or LIMM (8 byte insn)
+ */
+
+.macro SET_CURR_TASK_ON_CPU tsk, tmp
+ GET_CPU_ID \tmp
+ add2 \tmp, @_current_task, \tmp
+ st \tsk, [\tmp]
+#ifdef CONFIG_ARC_CURR_IN_REG
+ mov r25, \tsk
+#endif
+
+.endm
+
+
+#else /* Uniprocessor implementation of macros */
+
+.macro GET_CURR_TASK_ON_CPU reg
+ ld \reg, [@_current_task]
+.endm
+
+.macro SET_CURR_TASK_ON_CPU tsk, tmp
+ st \tsk, [@_current_task]
+#ifdef CONFIG_ARC_CURR_IN_REG
+ mov r25, \tsk
+#endif
+.endm
+
+#endif /* SMP / UNI */
+
+/* ------------------------------------------------------------------
+ * Get the ptr to some field of Current Task at @off in task struct
+ * -Uses r25 for Current task ptr if that is enabled
+ */
+
+#ifdef CONFIG_ARC_CURR_IN_REG
+
+.macro GET_CURR_TASK_FIELD_PTR off, reg
+ add \reg, r25, \off
+.endm
+
+#else
+
+.macro GET_CURR_TASK_FIELD_PTR off, reg
+ GET_CURR_TASK_ON_CPU \reg
+ add \reg, \reg, \off
+.endm
+
+#endif /* CONFIG_ARC_CURR_IN_REG */
+
+#endif /* __ASM_ARC_ENTRY_H */
diff --git a/arch/arc/include/asm/exec.h b/arch/arc/include/asm/exec.h
new file mode 100644
index 000000000..6134175d9
--- /dev/null
+++ b/arch/arc/include/asm/exec.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef __ASM_ARC_EXEC_H
+#define __ASM_ARC_EXEC_H
+
+/* Align to 16b */
+#define arch_align_stack(p) ((unsigned long)(p) & ~0xf)
+
+#endif
diff --git a/arch/arc/include/asm/fb.h b/arch/arc/include/asm/fb.h
new file mode 100644
index 000000000..dc2e303cd
--- /dev/null
+++ b/arch/arc/include/asm/fb.h
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_FB_H_
+#define _ASM_FB_H_
+
+#include <linux/fb.h>
+#include <linux/fs.h>
+#include <asm/page.h>
+
+static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma,
+ unsigned long off)
+{
+ vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+}
+
+static inline int fb_is_primary_device(struct fb_info *info)
+{
+ return 0;
+}
+
+#endif /* _ASM_FB_H_ */
diff --git a/arch/arc/include/asm/fpu.h b/arch/arc/include/asm/fpu.h
new file mode 100644
index 000000000..006bcf88a
--- /dev/null
+++ b/arch/arc/include/asm/fpu.h
@@ -0,0 +1,57 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2020 Synopsys, Inc. (www.synopsys.com)
+ *
+ */
+
+#ifndef _ASM_ARC_FPU_H
+#define _ASM_ARC_FPU_H
+
+#ifdef CONFIG_ARC_FPU_SAVE_RESTORE
+
+#include <asm/ptrace.h>
+
+#ifdef CONFIG_ISA_ARCOMPACT
+
+/* These DPFP regs need to be saved/restored across ctx-sw */
+struct arc_fpu {
+ struct {
+ unsigned int l, h;
+ } aux_dpfp[2];
+};
+
+#define fpu_init_task(regs)
+
+#else
+
+/*
+ * ARCv2 FPU Control aux register
+ * - bits to enable Traps on Exceptions
+ * - Rounding mode
+ *
+ * ARCv2 FPU Status aux register
+ * - FPU exceptions flags (Inv, Div-by-Zero, overflow, underflow, inexact)
+ * - Flag Write Enable to clear flags explicitly (vs. by fpu instructions
+ * only
+ */
+
+struct arc_fpu {
+ unsigned int ctrl, status;
+};
+
+extern void fpu_init_task(struct pt_regs *regs);
+
+#endif /* !CONFIG_ISA_ARCOMPACT */
+
+struct task_struct;
+
+extern void fpu_save_restore(struct task_struct *p, struct task_struct *n);
+
+#else /* !CONFIG_ARC_FPU_SAVE_RESTORE */
+
+#define fpu_save_restore(p, n)
+#define fpu_init_task(regs)
+
+#endif /* CONFIG_ARC_FPU_SAVE_RESTORE */
+
+#endif /* _ASM_ARC_FPU_H */
diff --git a/arch/arc/include/asm/futex.h b/arch/arc/include/asm/futex.h
new file mode 100644
index 000000000..607d1c16d
--- /dev/null
+++ b/arch/arc/include/asm/futex.h
@@ -0,0 +1,169 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * Vineetg: August 2010: From Android kernel work
+ */
+
+#ifndef _ASM_FUTEX_H
+#define _ASM_FUTEX_H
+
+#include <linux/futex.h>
+#include <linux/preempt.h>
+#include <linux/uaccess.h>
+#include <asm/errno.h>
+
+#ifdef CONFIG_ARC_HAS_LLSC
+
+#define __futex_atomic_op(insn, ret, oldval, uaddr, oparg)\
+ \
+ smp_mb(); \
+ __asm__ __volatile__( \
+ "1: llock %1, [%2] \n" \
+ insn "\n" \
+ "2: scond %0, [%2] \n" \
+ " bnz 1b \n" \
+ " mov %0, 0 \n" \
+ "3: \n" \
+ " .section .fixup,\"ax\" \n" \
+ " .align 4 \n" \
+ "4: mov %0, %4 \n" \
+ " j 3b \n" \
+ " .previous \n" \
+ " .section __ex_table,\"a\" \n" \
+ " .align 4 \n" \
+ " .word 1b, 4b \n" \
+ " .word 2b, 4b \n" \
+ " .previous \n" \
+ \
+ : "=&r" (ret), "=&r" (oldval) \
+ : "r" (uaddr), "r" (oparg), "ir" (-EFAULT) \
+ : "cc", "memory"); \
+ smp_mb() \
+
+#else /* !CONFIG_ARC_HAS_LLSC */
+
+#define __futex_atomic_op(insn, ret, oldval, uaddr, oparg)\
+ \
+ smp_mb(); \
+ __asm__ __volatile__( \
+ "1: ld %1, [%2] \n" \
+ insn "\n" \
+ "2: st %0, [%2] \n" \
+ " mov %0, 0 \n" \
+ "3: \n" \
+ " .section .fixup,\"ax\" \n" \
+ " .align 4 \n" \
+ "4: mov %0, %4 \n" \
+ " j 3b \n" \
+ " .previous \n" \
+ " .section __ex_table,\"a\" \n" \
+ " .align 4 \n" \
+ " .word 1b, 4b \n" \
+ " .word 2b, 4b \n" \
+ " .previous \n" \
+ \
+ : "=&r" (ret), "=&r" (oldval) \
+ : "r" (uaddr), "r" (oparg), "ir" (-EFAULT) \
+ : "cc", "memory"); \
+ smp_mb() \
+
+#endif
+
+static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval,
+ u32 __user *uaddr)
+{
+ int oldval = 0, ret;
+
+ if (!access_ok(uaddr, sizeof(u32)))
+ return -EFAULT;
+
+#ifndef CONFIG_ARC_HAS_LLSC
+ preempt_disable(); /* to guarantee atomic r-m-w of futex op */
+#endif
+
+ switch (op) {
+ case FUTEX_OP_SET:
+ __futex_atomic_op("mov %0, %3", ret, oldval, uaddr, oparg);
+ break;
+ case FUTEX_OP_ADD:
+ /* oldval = *uaddr; *uaddr += oparg ; ret = *uaddr */
+ __futex_atomic_op("add %0, %1, %3", ret, oldval, uaddr, oparg);
+ break;
+ case FUTEX_OP_OR:
+ __futex_atomic_op("or %0, %1, %3", ret, oldval, uaddr, oparg);
+ break;
+ case FUTEX_OP_ANDN:
+ __futex_atomic_op("bic %0, %1, %3", ret, oldval, uaddr, oparg);
+ break;
+ case FUTEX_OP_XOR:
+ __futex_atomic_op("xor %0, %1, %3", ret, oldval, uaddr, oparg);
+ break;
+ default:
+ ret = -ENOSYS;
+ }
+
+#ifndef CONFIG_ARC_HAS_LLSC
+ preempt_enable();
+#endif
+
+ if (!ret)
+ *oval = oldval;
+
+ return ret;
+}
+
+/*
+ * cmpxchg of futex (pagefaults disabled by caller)
+ * Return 0 for success, -EFAULT otherwise
+ */
+static inline int
+futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr, u32 expval,
+ u32 newval)
+{
+ int ret = 0;
+ u32 existval;
+
+ if (!access_ok(uaddr, sizeof(u32)))
+ return -EFAULT;
+
+#ifndef CONFIG_ARC_HAS_LLSC
+ preempt_disable(); /* to guarantee atomic r-m-w of futex op */
+#endif
+ smp_mb();
+
+ __asm__ __volatile__(
+#ifdef CONFIG_ARC_HAS_LLSC
+ "1: llock %1, [%4] \n"
+ " brne %1, %2, 3f \n"
+ "2: scond %3, [%4] \n"
+ " bnz 1b \n"
+#else
+ "1: ld %1, [%4] \n"
+ " brne %1, %2, 3f \n"
+ "2: st %3, [%4] \n"
+#endif
+ "3: \n"
+ " .section .fixup,\"ax\" \n"
+ "4: mov %0, %5 \n"
+ " j 3b \n"
+ " .previous \n"
+ " .section __ex_table,\"a\" \n"
+ " .align 4 \n"
+ " .word 1b, 4b \n"
+ " .word 2b, 4b \n"
+ " .previous\n"
+ : "+&r"(ret), "=&r"(existval)
+ : "r"(expval), "r"(newval), "r"(uaddr), "ir"(-EFAULT)
+ : "cc", "memory");
+
+ smp_mb();
+
+#ifndef CONFIG_ARC_HAS_LLSC
+ preempt_enable();
+#endif
+ *uval = existval;
+ return ret;
+}
+
+#endif
diff --git a/arch/arc/include/asm/highmem.h b/arch/arc/include/asm/highmem.h
new file mode 100644
index 000000000..a6b8e2c35
--- /dev/null
+++ b/arch/arc/include/asm/highmem.h
@@ -0,0 +1,53 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2015 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef _ASM_HIGHMEM_H
+#define _ASM_HIGHMEM_H
+
+#ifdef CONFIG_HIGHMEM
+
+#include <uapi/asm/page.h>
+#include <asm/kmap_size.h>
+
+#define FIXMAP_SIZE PGDIR_SIZE
+#define PKMAP_SIZE PGDIR_SIZE
+
+/* start after vmalloc area */
+#define FIXMAP_BASE (PAGE_OFFSET - FIXMAP_SIZE - PKMAP_SIZE)
+
+#define FIX_KMAP_SLOTS (KM_MAX_IDX * NR_CPUS)
+#define FIX_KMAP_BEGIN (0UL)
+#define FIX_KMAP_END ((FIX_KMAP_BEGIN + FIX_KMAP_SLOTS) - 1)
+
+#define FIXADDR_TOP (FIXMAP_BASE + (FIX_KMAP_END << PAGE_SHIFT))
+
+/*
+ * This should be converted to the asm-generic version, but of course this
+ * is needlessly different from all other architectures. Sigh - tglx
+ */
+#define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT))
+#define __virt_to_fix(x) (((FIXADDR_TOP - ((x) & PAGE_MASK))) >> PAGE_SHIFT)
+
+/* start after fixmap area */
+#define PKMAP_BASE (FIXMAP_BASE + FIXMAP_SIZE)
+#define LAST_PKMAP (PKMAP_SIZE >> PAGE_SHIFT)
+#define LAST_PKMAP_MASK (LAST_PKMAP - 1)
+#define PKMAP_ADDR(nr) (PKMAP_BASE + ((nr) << PAGE_SHIFT))
+#define PKMAP_NR(virt) (((virt) - PKMAP_BASE) >> PAGE_SHIFT)
+
+#include <asm/cacheflush.h>
+
+extern void kmap_init(void);
+
+#define arch_kmap_local_post_unmap(vaddr) \
+ local_flush_tlb_kernel_range(vaddr, vaddr + PAGE_SIZE)
+
+static inline void flush_cache_kmaps(void)
+{
+ flush_cache_all();
+}
+#endif
+
+#endif
diff --git a/arch/arc/include/asm/hugepage.h b/arch/arc/include/asm/hugepage.h
new file mode 100644
index 000000000..5001b796f
--- /dev/null
+++ b/arch/arc/include/asm/hugepage.h
@@ -0,0 +1,67 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2013-15 Synopsys, Inc. (www.synopsys.com)
+ */
+
+
+#ifndef _ASM_ARC_HUGEPAGE_H
+#define _ASM_ARC_HUGEPAGE_H
+
+#include <linux/types.h>
+#include <asm-generic/pgtable-nopmd.h>
+
+static inline pte_t pmd_pte(pmd_t pmd)
+{
+ return __pte(pmd_val(pmd));
+}
+
+static inline pmd_t pte_pmd(pte_t pte)
+{
+ return __pmd(pte_val(pte));
+}
+
+#define pmd_wrprotect(pmd) pte_pmd(pte_wrprotect(pmd_pte(pmd)))
+#define pmd_mkwrite(pmd) pte_pmd(pte_mkwrite(pmd_pte(pmd)))
+#define pmd_mkdirty(pmd) pte_pmd(pte_mkdirty(pmd_pte(pmd)))
+#define pmd_mkold(pmd) pte_pmd(pte_mkold(pmd_pte(pmd)))
+#define pmd_mkyoung(pmd) pte_pmd(pte_mkyoung(pmd_pte(pmd)))
+#define pmd_mkhuge(pmd) pte_pmd(pte_mkhuge(pmd_pte(pmd)))
+#define pmd_mkinvalid(pmd) pte_pmd(pte_mknotpresent(pmd_pte(pmd)))
+#define pmd_mkclean(pmd) pte_pmd(pte_mkclean(pmd_pte(pmd)))
+
+#define pmd_write(pmd) pte_write(pmd_pte(pmd))
+#define pmd_young(pmd) pte_young(pmd_pte(pmd))
+#define pmd_dirty(pmd) pte_dirty(pmd_pte(pmd))
+
+#define mk_pmd(page, prot) pte_pmd(mk_pte(page, prot))
+
+#define pmd_trans_huge(pmd) (pmd_val(pmd) & _PAGE_HW_SZ)
+
+#define pfn_pmd(pfn, prot) (__pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot)))
+
+static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
+{
+ /*
+ * open-coded pte_modify() with additional retaining of HW_SZ bit
+ * so that pmd_trans_huge() remains true for this PMD
+ */
+ return __pmd((pmd_val(pmd) & (_PAGE_CHG_MASK | _PAGE_HW_SZ)) | pgprot_val(newprot));
+}
+
+static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
+ pmd_t *pmdp, pmd_t pmd)
+{
+ *pmdp = pmd;
+}
+
+extern void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr,
+ pmd_t *pmd);
+
+#define __HAVE_ARCH_FLUSH_PMD_TLB_RANGE
+extern void flush_pmd_tlb_range(struct vm_area_struct *vma, unsigned long start,
+ unsigned long end);
+
+/* We don't have hardware dirty/accessed bits, generic_pmdp_establish is fine.*/
+#define pmdp_establish generic_pmdp_establish
+
+#endif
diff --git a/arch/arc/include/asm/io.h b/arch/arc/include/asm/io.h
new file mode 100644
index 000000000..80347382a
--- /dev/null
+++ b/arch/arc/include/asm/io.h
@@ -0,0 +1,235 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef _ASM_ARC_IO_H
+#define _ASM_ARC_IO_H
+
+#include <linux/types.h>
+#include <asm/byteorder.h>
+#include <asm/page.h>
+#include <asm/unaligned.h>
+
+#ifdef CONFIG_ISA_ARCV2
+#include <asm/barrier.h>
+#define __iormb() rmb()
+#define __iowmb() wmb()
+#else
+#define __iormb() do { } while (0)
+#define __iowmb() do { } while (0)
+#endif
+
+extern void __iomem *ioremap(phys_addr_t paddr, unsigned long size);
+extern void __iomem *ioremap_prot(phys_addr_t paddr, unsigned long size,
+ unsigned long flags);
+static inline void __iomem *ioport_map(unsigned long port, unsigned int nr)
+{
+ return (void __iomem *)port;
+}
+
+static inline void ioport_unmap(void __iomem *addr)
+{
+}
+
+extern void iounmap(const volatile void __iomem *addr);
+
+/*
+ * io{read,write}{16,32}be() macros
+ */
+#define ioread16be(p) ({ u16 __v = be16_to_cpu((__force __be16)__raw_readw(p)); __iormb(); __v; })
+#define ioread32be(p) ({ u32 __v = be32_to_cpu((__force __be32)__raw_readl(p)); __iormb(); __v; })
+
+#define iowrite16be(v,p) ({ __iowmb(); __raw_writew((__force u16)cpu_to_be16(v), p); })
+#define iowrite32be(v,p) ({ __iowmb(); __raw_writel((__force u32)cpu_to_be32(v), p); })
+
+/* Change struct page to physical address */
+#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
+
+#define __raw_readb __raw_readb
+static inline u8 __raw_readb(const volatile void __iomem *addr)
+{
+ u8 b;
+
+ __asm__ __volatile__(
+ " ldb%U1 %0, %1 \n"
+ : "=r" (b)
+ : "m" (*(volatile u8 __force *)addr)
+ : "memory");
+
+ return b;
+}
+
+#define __raw_readw __raw_readw
+static inline u16 __raw_readw(const volatile void __iomem *addr)
+{
+ u16 s;
+
+ __asm__ __volatile__(
+ " ldw%U1 %0, %1 \n"
+ : "=r" (s)
+ : "m" (*(volatile u16 __force *)addr)
+ : "memory");
+
+ return s;
+}
+
+#define __raw_readl __raw_readl
+static inline u32 __raw_readl(const volatile void __iomem *addr)
+{
+ u32 w;
+
+ __asm__ __volatile__(
+ " ld%U1 %0, %1 \n"
+ : "=r" (w)
+ : "m" (*(volatile u32 __force *)addr)
+ : "memory");
+
+ return w;
+}
+
+/*
+ * {read,write}s{b,w,l}() repeatedly access the same IO address in
+ * native endianness in 8-, 16-, 32-bit chunks {into,from} memory,
+ * @count times
+ */
+#define __raw_readsx(t,f) \
+static inline void __raw_reads##f(const volatile void __iomem *addr, \
+ void *ptr, unsigned int count) \
+{ \
+ bool is_aligned = ((unsigned long)ptr % ((t) / 8)) == 0; \
+ u##t *buf = ptr; \
+ \
+ if (!count) \
+ return; \
+ \
+ /* Some ARC CPU's don't support unaligned accesses */ \
+ if (is_aligned) { \
+ do { \
+ u##t x = __raw_read##f(addr); \
+ *buf++ = x; \
+ } while (--count); \
+ } else { \
+ do { \
+ u##t x = __raw_read##f(addr); \
+ put_unaligned(x, buf++); \
+ } while (--count); \
+ } \
+}
+
+#define __raw_readsb __raw_readsb
+__raw_readsx(8, b)
+#define __raw_readsw __raw_readsw
+__raw_readsx(16, w)
+#define __raw_readsl __raw_readsl
+__raw_readsx(32, l)
+
+#define __raw_writeb __raw_writeb
+static inline void __raw_writeb(u8 b, volatile void __iomem *addr)
+{
+ __asm__ __volatile__(
+ " stb%U1 %0, %1 \n"
+ :
+ : "r" (b), "m" (*(volatile u8 __force *)addr)
+ : "memory");
+}
+
+#define __raw_writew __raw_writew
+static inline void __raw_writew(u16 s, volatile void __iomem *addr)
+{
+ __asm__ __volatile__(
+ " stw%U1 %0, %1 \n"
+ :
+ : "r" (s), "m" (*(volatile u16 __force *)addr)
+ : "memory");
+
+}
+
+#define __raw_writel __raw_writel
+static inline void __raw_writel(u32 w, volatile void __iomem *addr)
+{
+ __asm__ __volatile__(
+ " st%U1 %0, %1 \n"
+ :
+ : "r" (w), "m" (*(volatile u32 __force *)addr)
+ : "memory");
+
+}
+
+#define __raw_writesx(t,f) \
+static inline void __raw_writes##f(volatile void __iomem *addr, \
+ const void *ptr, unsigned int count) \
+{ \
+ bool is_aligned = ((unsigned long)ptr % ((t) / 8)) == 0; \
+ const u##t *buf = ptr; \
+ \
+ if (!count) \
+ return; \
+ \
+ /* Some ARC CPU's don't support unaligned accesses */ \
+ if (is_aligned) { \
+ do { \
+ __raw_write##f(*buf++, addr); \
+ } while (--count); \
+ } else { \
+ do { \
+ __raw_write##f(get_unaligned(buf++), addr); \
+ } while (--count); \
+ } \
+}
+
+#define __raw_writesb __raw_writesb
+__raw_writesx(8, b)
+#define __raw_writesw __raw_writesw
+__raw_writesx(16, w)
+#define __raw_writesl __raw_writesl
+__raw_writesx(32, l)
+
+/*
+ * MMIO can also get buffered/optimized in micro-arch, so barriers needed
+ * Based on ARM model for the typical use case
+ *
+ * <ST [DMA buffer]>
+ * <writel MMIO "go" reg>
+ * or:
+ * <readl MMIO "status" reg>
+ * <LD [DMA buffer]>
+ *
+ * http://lkml.kernel.org/r/20150622133656.GG1583@arm.com
+ */
+#define readb(c) ({ u8 __v = readb_relaxed(c); __iormb(); __v; })
+#define readw(c) ({ u16 __v = readw_relaxed(c); __iormb(); __v; })
+#define readl(c) ({ u32 __v = readl_relaxed(c); __iormb(); __v; })
+#define readsb(p,d,l) ({ __raw_readsb(p,d,l); __iormb(); })
+#define readsw(p,d,l) ({ __raw_readsw(p,d,l); __iormb(); })
+#define readsl(p,d,l) ({ __raw_readsl(p,d,l); __iormb(); })
+
+#define writeb(v,c) ({ __iowmb(); writeb_relaxed(v,c); })
+#define writew(v,c) ({ __iowmb(); writew_relaxed(v,c); })
+#define writel(v,c) ({ __iowmb(); writel_relaxed(v,c); })
+#define writesb(p,d,l) ({ __iowmb(); __raw_writesb(p,d,l); })
+#define writesw(p,d,l) ({ __iowmb(); __raw_writesw(p,d,l); })
+#define writesl(p,d,l) ({ __iowmb(); __raw_writesl(p,d,l); })
+
+/*
+ * Relaxed API for drivers which can handle barrier ordering themselves
+ *
+ * Also these are defined to perform little endian accesses.
+ * To provide the typical device register semantics of fixed endian,
+ * swap the byte order for Big Endian
+ *
+ * http://lkml.kernel.org/r/201603100845.30602.arnd@arndb.de
+ */
+#define readb_relaxed(c) __raw_readb(c)
+#define readw_relaxed(c) ({ u16 __r = le16_to_cpu((__force __le16) \
+ __raw_readw(c)); __r; })
+#define readl_relaxed(c) ({ u32 __r = le32_to_cpu((__force __le32) \
+ __raw_readl(c)); __r; })
+
+#define writeb_relaxed(v,c) __raw_writeb(v,c)
+#define writew_relaxed(v,c) __raw_writew((__force u16) cpu_to_le16(v),c)
+#define writel_relaxed(v,c) __raw_writel((__force u32) cpu_to_le32(v),c)
+
+#include <asm-generic/io.h>
+
+#endif /* _ASM_ARC_IO_H */
diff --git a/arch/arc/include/asm/irq.h b/arch/arc/include/asm/irq.h
new file mode 100644
index 000000000..0309cb405
--- /dev/null
+++ b/arch/arc/include/asm/irq.h
@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef __ASM_ARC_IRQ_H
+#define __ASM_ARC_IRQ_H
+
+/*
+ * ARCv2 can support 240 interrupts in the core interrupts controllers and
+ * 128 interrupts in IDU. Thus 512 virtual IRQs must be enough for most
+ * configurations of boards.
+ * This doesnt affect ARCompact, but we change it to same value
+ */
+#define NR_IRQS 512
+
+/* Platform Independent IRQs */
+#ifdef CONFIG_ISA_ARCV2
+#define IPI_IRQ 19
+#define SOFTIRQ_IRQ 21
+#define FIRST_EXT_IRQ 24
+#endif
+
+#include <linux/interrupt.h>
+#include <asm-generic/irq.h>
+
+extern void arc_init_IRQ(void);
+
+#endif
diff --git a/arch/arc/include/asm/irqflags-arcv2.h b/arch/arc/include/asm/irqflags-arcv2.h
new file mode 100644
index 000000000..fb3c21f1a
--- /dev/null
+++ b/arch/arc/include/asm/irqflags-arcv2.h
@@ -0,0 +1,175 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef __ASM_IRQFLAGS_ARCV2_H
+#define __ASM_IRQFLAGS_ARCV2_H
+
+#include <asm/arcregs.h>
+
+/* status32 Bits */
+#define STATUS_AD_BIT 19 /* Disable Align chk: core supports non-aligned */
+#define STATUS_IE_BIT 31
+
+#define STATUS_AD_MASK (1<<STATUS_AD_BIT)
+#define STATUS_IE_MASK (1<<STATUS_IE_BIT)
+
+/* status32 Bits as encoded/expected by CLRI/SETI */
+#define CLRI_STATUS_IE_BIT 4
+
+#define CLRI_STATUS_E_MASK 0xF
+#define CLRI_STATUS_IE_MASK (1 << CLRI_STATUS_IE_BIT)
+
+#define AUX_USER_SP 0x00D
+#define AUX_IRQ_CTRL 0x00E
+#define AUX_IRQ_ACT 0x043 /* Active Intr across all levels */
+#define AUX_IRQ_LVL_PEND 0x200 /* Pending Intr across all levels */
+#define AUX_IRQ_HINT 0x201 /* For generating Soft Interrupts */
+#define AUX_IRQ_PRIORITY 0x206
+#define ICAUSE 0x40a
+#define AUX_IRQ_SELECT 0x40b
+#define AUX_IRQ_ENABLE 0x40c
+
+/* Was Intr taken in User Mode */
+#define AUX_IRQ_ACT_BIT_U 31
+
+/*
+ * Hardware supports 16 priorities (0 highest, 15 lowest)
+ * Linux by default runs at 1, priority 0 reserved for NMI style interrupts
+ */
+#define ARCV2_IRQ_DEF_PRIO 1
+
+/* seed value for status register */
+#ifdef CONFIG_ARC_USE_UNALIGNED_MEM_ACCESS
+#define __AD_ENB STATUS_AD_MASK
+#else
+#define __AD_ENB 0
+#endif
+
+#define ISA_INIT_STATUS_BITS (STATUS_IE_MASK | __AD_ENB | \
+ (ARCV2_IRQ_DEF_PRIO << 1))
+
+#ifndef __ASSEMBLY__
+
+/*
+ * Save IRQ state and disable IRQs
+ */
+static inline long arch_local_irq_save(void)
+{
+ unsigned long flags;
+
+ __asm__ __volatile__(" clri %0 \n" : "=r" (flags) : : "memory");
+
+ return flags;
+}
+
+/*
+ * restore saved IRQ state
+ */
+static inline void arch_local_irq_restore(unsigned long flags)
+{
+ __asm__ __volatile__(" seti %0 \n" : : "r" (flags) : "memory");
+}
+
+/*
+ * Unconditionally Enable IRQs
+ */
+static inline void arch_local_irq_enable(void)
+{
+ unsigned int irqact = read_aux_reg(AUX_IRQ_ACT);
+
+ if (irqact & 0xffff)
+ write_aux_reg(AUX_IRQ_ACT, irqact & ~0xffff);
+
+ __asm__ __volatile__(" seti \n" : : : "memory");
+}
+
+/*
+ * Unconditionally Disable IRQs
+ */
+static inline void arch_local_irq_disable(void)
+{
+ __asm__ __volatile__(" clri \n" : : : "memory");
+}
+
+/*
+ * save IRQ state
+ */
+static inline long arch_local_save_flags(void)
+{
+ unsigned long temp;
+
+ __asm__ __volatile__(
+ " lr %0, [status32] \n"
+ : "=&r"(temp)
+ :
+ : "memory");
+
+ /* To be compatible with irq_save()/irq_restore()
+ * encode the irq bits as expected by CLRI/SETI
+ * (this was needed to make CONFIG_TRACE_IRQFLAGS work)
+ */
+ temp = (1 << 5) |
+ ((!!(temp & STATUS_IE_MASK)) << CLRI_STATUS_IE_BIT) |
+ ((temp >> 1) & CLRI_STATUS_E_MASK);
+ return temp;
+}
+
+/*
+ * Query IRQ state
+ */
+static inline int arch_irqs_disabled_flags(unsigned long flags)
+{
+ return !(flags & CLRI_STATUS_IE_MASK);
+}
+
+static inline int arch_irqs_disabled(void)
+{
+ return arch_irqs_disabled_flags(arch_local_save_flags());
+}
+
+static inline void arc_softirq_trigger(int irq)
+{
+ write_aux_reg(AUX_IRQ_HINT, irq);
+}
+
+static inline void arc_softirq_clear(int irq)
+{
+ write_aux_reg(AUX_IRQ_HINT, 0);
+}
+
+#else
+
+#ifdef CONFIG_TRACE_IRQFLAGS
+
+.macro TRACE_ASM_IRQ_DISABLE
+ bl trace_hardirqs_off
+.endm
+
+.macro TRACE_ASM_IRQ_ENABLE
+ bl trace_hardirqs_on
+.endm
+
+#else
+
+.macro TRACE_ASM_IRQ_DISABLE
+.endm
+
+.macro TRACE_ASM_IRQ_ENABLE
+.endm
+
+#endif
+.macro IRQ_DISABLE scratch
+ clri
+ TRACE_ASM_IRQ_DISABLE
+.endm
+
+.macro IRQ_ENABLE scratch
+ TRACE_ASM_IRQ_ENABLE
+ seti
+.endm
+
+#endif /* __ASSEMBLY__ */
+
+#endif
diff --git a/arch/arc/include/asm/irqflags-compact.h b/arch/arc/include/asm/irqflags-compact.h
new file mode 100644
index 000000000..0d63e568d
--- /dev/null
+++ b/arch/arc/include/asm/irqflags-compact.h
@@ -0,0 +1,201 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef __ASM_IRQFLAGS_ARCOMPACT_H
+#define __ASM_IRQFLAGS_ARCOMPACT_H
+
+/* vineetg: March 2010 : local_irq_save( ) optimisation
+ * -Remove explicit mov of current status32 into reg, that is not needed
+ * -Use BIC insn instead of INVERTED + AND
+ * -Conditionally disable interrupts (if they are not enabled, don't disable)
+*/
+
+#include <asm/arcregs.h>
+
+/* status32 Reg bits related to Interrupt Handling */
+#define STATUS_E1_BIT 1 /* Int 1 enable */
+#define STATUS_E2_BIT 2 /* Int 2 enable */
+#define STATUS_A1_BIT 3 /* Int 1 active */
+#define STATUS_A2_BIT 4 /* Int 2 active */
+#define STATUS_AE_BIT 5 /* Exception active */
+
+#define STATUS_E1_MASK (1<<STATUS_E1_BIT)
+#define STATUS_E2_MASK (1<<STATUS_E2_BIT)
+#define STATUS_A1_MASK (1<<STATUS_A1_BIT)
+#define STATUS_A2_MASK (1<<STATUS_A2_BIT)
+#define STATUS_AE_MASK (1<<STATUS_AE_BIT)
+#define STATUS_IE_MASK (STATUS_E1_MASK | STATUS_E2_MASK)
+
+/* Other Interrupt Handling related Aux regs */
+#define AUX_IRQ_LEV 0x200 /* IRQ Priority: L1 or L2 */
+#define AUX_IRQ_HINT 0x201 /* For generating Soft Interrupts */
+#define AUX_IRQ_LV12 0x43 /* interrupt level register */
+
+#define AUX_IENABLE 0x40c
+#define AUX_ITRIGGER 0x40d
+#define AUX_IPULSE 0x415
+
+#define ISA_INIT_STATUS_BITS STATUS_IE_MASK
+
+#ifndef __ASSEMBLY__
+
+/******************************************************************
+ * IRQ Control Macros
+ *
+ * All of them have "memory" clobber (compiler barrier) which is needed to
+ * ensure that LD/ST requiring irq safetly (R-M-W when LLSC is not available)
+ * are redone after IRQs are re-enabled (and gcc doesn't reuse stale register)
+ *
+ * Noted at the time of Abilis Timer List corruption
+ *
+ * Orig Bug + Rejected solution:
+ * https://lore.kernel.org/lkml/1364553218-31255-1-git-send-email-vgupta@synopsys.com
+ *
+ * Reasoning:
+ * https://lore.kernel.org/lkml/CA+55aFyFWjpSVQM6M266tKrG_ZXJzZ-nYejpmXYQXbrr42mGPQ@mail.gmail.com
+ *
+ ******************************************************************/
+
+/*
+ * Save IRQ state and disable IRQs
+ */
+static inline long arch_local_irq_save(void)
+{
+ unsigned long temp, flags;
+
+ __asm__ __volatile__(
+ " lr %1, [status32] \n"
+ " bic %0, %1, %2 \n"
+ " and.f 0, %1, %2 \n"
+ " flag.nz %0 \n"
+ : "=r"(temp), "=r"(flags)
+ : "n"((STATUS_E1_MASK | STATUS_E2_MASK))
+ : "memory", "cc");
+
+ return flags;
+}
+
+/*
+ * restore saved IRQ state
+ */
+static inline void arch_local_irq_restore(unsigned long flags)
+{
+
+ __asm__ __volatile__(
+ " flag %0 \n"
+ :
+ : "r"(flags)
+ : "memory");
+}
+
+/*
+ * Unconditionally Enable IRQs
+ */
+#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS
+extern void arch_local_irq_enable(void);
+#else
+static inline void arch_local_irq_enable(void)
+{
+ unsigned long temp;
+
+ __asm__ __volatile__(
+ " lr %0, [status32] \n"
+ " or %0, %0, %1 \n"
+ " flag %0 \n"
+ : "=&r"(temp)
+ : "n"((STATUS_E1_MASK | STATUS_E2_MASK))
+ : "cc", "memory");
+}
+#endif
+
+/*
+ * Unconditionally Disable IRQs
+ */
+static inline void arch_local_irq_disable(void)
+{
+ unsigned long temp;
+
+ __asm__ __volatile__(
+ " lr %0, [status32] \n"
+ " and %0, %0, %1 \n"
+ " flag %0 \n"
+ : "=&r"(temp)
+ : "n"(~(STATUS_E1_MASK | STATUS_E2_MASK))
+ : "memory");
+}
+
+/*
+ * save IRQ state
+ */
+static inline long arch_local_save_flags(void)
+{
+ unsigned long temp;
+
+ __asm__ __volatile__(
+ " lr %0, [status32] \n"
+ : "=&r"(temp)
+ :
+ : "memory");
+
+ return temp;
+}
+
+/*
+ * Query IRQ state
+ */
+static inline int arch_irqs_disabled_flags(unsigned long flags)
+{
+ return !(flags & (STATUS_E1_MASK
+#ifdef CONFIG_ARC_COMPACT_IRQ_LEVELS
+ | STATUS_E2_MASK
+#endif
+ ));
+}
+
+static inline int arch_irqs_disabled(void)
+{
+ return arch_irqs_disabled_flags(arch_local_save_flags());
+}
+
+#else
+
+#ifdef CONFIG_TRACE_IRQFLAGS
+
+.macro TRACE_ASM_IRQ_DISABLE
+ bl trace_hardirqs_off
+.endm
+
+.macro TRACE_ASM_IRQ_ENABLE
+ bl trace_hardirqs_on
+.endm
+
+#else
+
+.macro TRACE_ASM_IRQ_DISABLE
+.endm
+
+.macro TRACE_ASM_IRQ_ENABLE
+.endm
+
+#endif
+
+.macro IRQ_DISABLE scratch
+ lr \scratch, [status32]
+ bic \scratch, \scratch, (STATUS_E1_MASK | STATUS_E2_MASK)
+ flag \scratch
+ TRACE_ASM_IRQ_DISABLE
+.endm
+
+.macro IRQ_ENABLE scratch
+ TRACE_ASM_IRQ_ENABLE
+ lr \scratch, [status32]
+ or \scratch, \scratch, (STATUS_E1_MASK | STATUS_E2_MASK)
+ flag \scratch
+.endm
+
+#endif /* __ASSEMBLY__ */
+
+#endif
diff --git a/arch/arc/include/asm/irqflags.h b/arch/arc/include/asm/irqflags.h
new file mode 100644
index 000000000..edf201a69
--- /dev/null
+++ b/arch/arc/include/asm/irqflags.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef __ASM_ARC_IRQFLAGS_H
+#define __ASM_ARC_IRQFLAGS_H
+
+#ifdef CONFIG_ISA_ARCOMPACT
+#include <asm/irqflags-compact.h>
+#else
+#include <asm/irqflags-arcv2.h>
+#endif
+
+#endif
diff --git a/arch/arc/include/asm/jump_label.h b/arch/arc/include/asm/jump_label.h
new file mode 100644
index 000000000..9d9618079
--- /dev/null
+++ b/arch/arc/include/asm/jump_label.h
@@ -0,0 +1,72 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_ARC_JUMP_LABEL_H
+#define _ASM_ARC_JUMP_LABEL_H
+
+#ifndef __ASSEMBLY__
+
+#include <linux/stringify.h>
+#include <linux/types.h>
+
+#define JUMP_LABEL_NOP_SIZE 4
+
+/*
+ * NOTE about '.balign 4':
+ *
+ * To make atomic update of patched instruction available we need to guarantee
+ * that this instruction doesn't cross L1 cache line boundary.
+ *
+ * As of today we simply align instruction which can be patched by 4 byte using
+ * ".balign 4" directive. In that case patched instruction is aligned with one
+ * 16-bit NOP_S if this is required.
+ * However 'align by 4' directive is much stricter than it actually required.
+ * It's enough that our 32-bit instruction don't cross L1 cache line boundary /
+ * L1 I$ fetch block boundary which can be achieved by using
+ * ".bundle_align_mode" assembler directive. That will save us from adding
+ * useless NOP_S padding in most of the cases.
+ *
+ * TODO: switch to ".bundle_align_mode" directive using whin it will be
+ * supported by ARC toolchain.
+ */
+
+static __always_inline bool arch_static_branch(struct static_key *key,
+ bool branch)
+{
+ asm_volatile_goto(".balign "__stringify(JUMP_LABEL_NOP_SIZE)" \n"
+ "1: \n"
+ "nop \n"
+ ".pushsection __jump_table, \"aw\" \n"
+ ".word 1b, %l[l_yes], %c0 \n"
+ ".popsection \n"
+ : : "i" (&((char *)key)[branch]) : : l_yes);
+
+ return false;
+l_yes:
+ return true;
+}
+
+static __always_inline bool arch_static_branch_jump(struct static_key *key,
+ bool branch)
+{
+ asm_volatile_goto(".balign "__stringify(JUMP_LABEL_NOP_SIZE)" \n"
+ "1: \n"
+ "b %l[l_yes] \n"
+ ".pushsection __jump_table, \"aw\" \n"
+ ".word 1b, %l[l_yes], %c0 \n"
+ ".popsection \n"
+ : : "i" (&((char *)key)[branch]) : : l_yes);
+
+ return false;
+l_yes:
+ return true;
+}
+
+typedef u32 jump_label_t;
+
+struct jump_entry {
+ jump_label_t code;
+ jump_label_t target;
+ jump_label_t key;
+};
+
+#endif /* __ASSEMBLY__ */
+#endif
diff --git a/arch/arc/include/asm/kdebug.h b/arch/arc/include/asm/kdebug.h
new file mode 100644
index 000000000..f92049d1d
--- /dev/null
+++ b/arch/arc/include/asm/kdebug.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef _ASM_ARC_KDEBUG_H
+#define _ASM_ARC_KDEBUG_H
+
+enum die_val {
+ DIE_UNUSED,
+ DIE_TRAP,
+ DIE_IERR,
+ DIE_OOPS
+};
+
+#endif
diff --git a/arch/arc/include/asm/kgdb.h b/arch/arc/include/asm/kgdb.h
new file mode 100644
index 000000000..f9f71b909
--- /dev/null
+++ b/arch/arc/include/asm/kgdb.h
@@ -0,0 +1,60 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * kgdb support for ARC
+ *
+ * Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef __ARC_KGDB_H__
+#define __ARC_KGDB_H__
+
+#ifdef CONFIG_KGDB
+
+#include <asm/ptrace.h>
+
+/* to ensure compatibility with Linux 2.6.35, we don't implement the get/set
+ * register API yet */
+#undef DBG_MAX_REG_NUM
+
+#define GDB_MAX_REGS 87
+
+#define BREAK_INSTR_SIZE 2
+#define CACHE_FLUSH_IS_SAFE 1
+#define NUMREGBYTES (GDB_MAX_REGS * 4)
+#define BUFMAX 2048
+
+static inline void arch_kgdb_breakpoint(void)
+{
+ __asm__ __volatile__ ("trap_s 0x4\n");
+}
+
+extern void kgdb_trap(struct pt_regs *regs);
+
+/* This is the numbering of registers according to the GDB. See GDB's
+ * arc-tdep.h for details.
+ *
+ * Registers are ordered for GDB 7.5. It is incompatible with GDB 6.8. */
+enum arc_linux_regnums {
+ _R0 = 0,
+ _R1, _R2, _R3, _R4, _R5, _R6, _R7, _R8, _R9, _R10, _R11, _R12, _R13,
+ _R14, _R15, _R16, _R17, _R18, _R19, _R20, _R21, _R22, _R23, _R24,
+ _R25, _R26,
+ _FP = 27,
+ __SP = 28,
+ _R30 = 30,
+ _BLINK = 31,
+ _LP_COUNT = 60,
+ _STOP_PC = 64,
+ _RET = 64,
+ _LP_START = 65,
+ _LP_END = 66,
+ _STATUS32 = 67,
+ _ECR = 76,
+ _BTA = 82,
+};
+
+#else
+#define kgdb_trap(regs)
+#endif
+
+#endif /* __ARC_KGDB_H__ */
diff --git a/arch/arc/include/asm/kprobes.h b/arch/arc/include/asm/kprobes.h
new file mode 100644
index 000000000..de1566e32
--- /dev/null
+++ b/arch/arc/include/asm/kprobes.h
@@ -0,0 +1,55 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef _ARC_KPROBES_H
+#define _ARC_KPROBES_H
+
+#include <asm-generic/kprobes.h>
+
+#ifdef CONFIG_KPROBES
+
+typedef u16 kprobe_opcode_t;
+
+#define UNIMP_S_INSTRUCTION 0x79e0
+#define TRAP_S_2_INSTRUCTION 0x785e
+
+#define MAX_INSN_SIZE 8
+#define MAX_STACK_SIZE 64
+
+struct arch_specific_insn {
+ int is_short;
+ kprobe_opcode_t *t1_addr, *t2_addr;
+ kprobe_opcode_t t1_opcode, t2_opcode;
+};
+
+#define flush_insn_slot(p) do { } while (0)
+
+#define kretprobe_blacklist_size 0
+
+struct kprobe;
+
+void arch_remove_kprobe(struct kprobe *p);
+
+int kprobe_exceptions_notify(struct notifier_block *self,
+ unsigned long val, void *data);
+
+struct prev_kprobe {
+ struct kprobe *kp;
+ unsigned long status;
+};
+
+struct kprobe_ctlblk {
+ unsigned int kprobe_status;
+ struct prev_kprobe prev_kprobe;
+};
+
+int kprobe_fault_handler(struct pt_regs *regs, unsigned long cause);
+void __kretprobe_trampoline(void);
+void trap_is_kprobe(unsigned long address, struct pt_regs *regs);
+#else
+#define trap_is_kprobe(address, regs)
+#endif /* CONFIG_KPROBES */
+
+#endif /* _ARC_KPROBES_H */
diff --git a/arch/arc/include/asm/linkage.h b/arch/arc/include/asm/linkage.h
new file mode 100644
index 000000000..8a3fb71e9
--- /dev/null
+++ b/arch/arc/include/asm/linkage.h
@@ -0,0 +1,80 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef __ASM_LINKAGE_H
+#define __ASM_LINKAGE_H
+
+#include <asm/dwarf.h>
+
+#define ASM_NL ` /* use '`' to mark new line in macro */
+#define __ALIGN .align 4
+#define __ALIGN_STR __stringify(__ALIGN)
+
+#ifdef __ASSEMBLY__
+
+.macro ST2 e, o, off
+#ifdef CONFIG_ARC_HAS_LL64
+ std \e, [sp, \off]
+#else
+ st \e, [sp, \off]
+ st \o, [sp, \off+4]
+#endif
+.endm
+
+.macro LD2 e, o, off
+#ifdef CONFIG_ARC_HAS_LL64
+ ldd \e, [sp, \off]
+#else
+ ld \e, [sp, \off]
+ ld \o, [sp, \off+4]
+#endif
+.endm
+
+/* annotation for data we want in DCCM - if enabled in .config */
+.macro ARCFP_DATA nm
+#ifdef CONFIG_ARC_HAS_DCCM
+ .section .data.arcfp
+#else
+ .section .data
+#endif
+ .global \nm
+.endm
+
+/* annotation for data we want in DCCM - if enabled in .config */
+.macro ARCFP_CODE
+#ifdef CONFIG_ARC_HAS_ICCM
+ .section .text.arcfp, "ax",@progbits
+#else
+ .section .text, "ax",@progbits
+#endif
+.endm
+
+#define ENTRY_CFI(name) \
+ .globl name ASM_NL \
+ ALIGN ASM_NL \
+ name: ASM_NL \
+ CFI_STARTPROC ASM_NL
+
+#define END_CFI(name) \
+ CFI_ENDPROC ASM_NL \
+ .size name, .-name
+
+#else /* !__ASSEMBLY__ */
+
+#ifdef CONFIG_ARC_HAS_ICCM
+#define __arcfp_code __section(".text.arcfp")
+#else
+#define __arcfp_code __section(".text")
+#endif
+
+#ifdef CONFIG_ARC_HAS_DCCM
+#define __arcfp_data __section(".data.arcfp")
+#else
+#define __arcfp_data __section(".data")
+#endif
+
+#endif /* __ASSEMBLY__ */
+
+#endif
diff --git a/arch/arc/include/asm/mach_desc.h b/arch/arc/include/asm/mach_desc.h
new file mode 100644
index 000000000..c4e197059
--- /dev/null
+++ b/arch/arc/include/asm/mach_desc.h
@@ -0,0 +1,64 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * based on METAG mach/arch.h (which in turn was based on ARM)
+ */
+
+#ifndef _ASM_ARC_MACH_DESC_H_
+#define _ASM_ARC_MACH_DESC_H_
+
+/**
+ * struct machine_desc - Board specific callbacks, called from ARC common code
+ * Provided by each ARC board using MACHINE_START()/MACHINE_END(), so
+ * a multi-platform kernel builds with array of such descriptors.
+ * We extend the early DT scan to also match the DT's "compatible" string
+ * against the @dt_compat of all such descriptors, and one with highest
+ * "DT score" is selected as global @machine_desc.
+ *
+ * @name: Board/SoC name
+ * @dt_compat: Array of device tree 'compatible' strings
+ * (XXX: although only 1st entry is looked at)
+ * @init_early: Very early callback [called from setup_arch()]
+ * @init_per_cpu: for each CPU as it is coming up (SMP as well as UP)
+ * [(M):init_IRQ(), (o):start_kernel_secondary()]
+ * @init_machine: arch initcall level callback (e.g. populate static
+ * platform devices or parse Devicetree)
+ * @init_late: Late initcall level callback
+ *
+ */
+struct machine_desc {
+ const char *name;
+ const char **dt_compat;
+ void (*init_early)(void);
+ void (*init_per_cpu)(unsigned int);
+ void (*init_machine)(void);
+ void (*init_late)(void);
+
+};
+
+/*
+ * Current machine - only accessible during boot.
+ */
+extern const struct machine_desc *machine_desc;
+
+/*
+ * Machine type table - also only accessible during boot
+ */
+extern const struct machine_desc __arch_info_begin[], __arch_info_end[];
+
+/*
+ * Set of macros to define architecture features.
+ * This is built into a table by the linker.
+ */
+#define MACHINE_START(_type, _name) \
+static const struct machine_desc __mach_desc_##_type \
+__used __section(".arch.info.init") = { \
+ .name = _name,
+
+#define MACHINE_END \
+};
+
+extern const struct machine_desc *setup_machine_fdt(void *dt);
+
+#endif
diff --git a/arch/arc/include/asm/mmu-arcv2.h b/arch/arc/include/asm/mmu-arcv2.h
new file mode 100644
index 000000000..ed9036d4e
--- /dev/null
+++ b/arch/arc/include/asm/mmu-arcv2.h
@@ -0,0 +1,103 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012, 2019-20 Synopsys, Inc. (www.synopsys.com)
+ *
+ * MMUv3 (arc700) / MMUv4 (archs) are software page walked and software managed.
+ * This file contains the TLB access registers and commands
+ */
+
+#ifndef _ASM_ARC_MMU_ARCV2_H
+#define _ASM_ARC_MMU_ARCV2_H
+
+/*
+ * TLB Management regs
+ */
+#define ARC_REG_MMU_BCR 0x06f
+
+#ifdef CONFIG_ARC_MMU_V3
+#define ARC_REG_TLBPD0 0x405
+#define ARC_REG_TLBPD1 0x406
+#define ARC_REG_TLBPD1HI 0 /* Dummy: allows common code */
+#define ARC_REG_TLBINDEX 0x407
+#define ARC_REG_TLBCOMMAND 0x408
+#define ARC_REG_PID 0x409
+#define ARC_REG_SCRATCH_DATA0 0x418
+#else
+#define ARC_REG_TLBPD0 0x460
+#define ARC_REG_TLBPD1 0x461
+#define ARC_REG_TLBPD1HI 0x463
+#define ARC_REG_TLBINDEX 0x464
+#define ARC_REG_TLBCOMMAND 0x465
+#define ARC_REG_PID 0x468
+#define ARC_REG_SCRATCH_DATA0 0x46c
+#endif
+
+/* Bits in MMU PID reg */
+#define __TLB_ENABLE (1 << 31)
+#define __PROG_ENABLE (1 << 30)
+#define MMU_ENABLE (__TLB_ENABLE | __PROG_ENABLE)
+
+/* Bits in TLB Index reg */
+#define TLB_LKUP_ERR 0x80000000
+
+#ifdef CONFIG_ARC_MMU_V3
+#define TLB_DUP_ERR (TLB_LKUP_ERR | 0x00000001)
+#else
+#define TLB_DUP_ERR (TLB_LKUP_ERR | 0x40000000)
+#endif
+
+/*
+ * TLB Commands
+ */
+#define TLBWrite 0x1
+#define TLBRead 0x2
+#define TLBGetIndex 0x3
+#define TLBProbe 0x4
+#define TLBWriteNI 0x5 /* write JTLB without inv uTLBs */
+#define TLBIVUTLB 0x6 /* explicitly inv uTLBs */
+
+#ifdef CONFIG_ARC_MMU_V4
+#define TLBInsertEntry 0x7
+#define TLBDeleteEntry 0x8
+#endif
+
+/* Masks for actual TLB "PD"s */
+#define PTE_BITS_IN_PD0 (_PAGE_GLOBAL | _PAGE_PRESENT | _PAGE_HW_SZ)
+#define PTE_BITS_RWX (_PAGE_EXECUTE | _PAGE_WRITE | _PAGE_READ)
+
+#define PTE_BITS_NON_RWX_IN_PD1 (PAGE_MASK_PHYS | _PAGE_CACHEABLE)
+
+#ifndef __ASSEMBLY__
+
+struct mm_struct;
+extern int pae40_exist_but_not_enab(void);
+
+static inline int is_pae40_enabled(void)
+{
+ return IS_ENABLED(CONFIG_ARC_HAS_PAE40);
+}
+
+static inline void mmu_setup_asid(struct mm_struct *mm, unsigned long asid)
+{
+ write_aux_reg(ARC_REG_PID, asid | MMU_ENABLE);
+}
+
+static inline void mmu_setup_pgd(struct mm_struct *mm, void *pgd)
+{
+ /* PGD cached in MMU reg to avoid 3 mem lookups: task->mm->pgd */
+#ifdef CONFIG_ISA_ARCV2
+ write_aux_reg(ARC_REG_SCRATCH_DATA0, (unsigned int)pgd);
+#endif
+}
+
+#else
+
+.macro ARC_MMU_REENABLE reg
+ lr \reg, [ARC_REG_PID]
+ or \reg, \reg, MMU_ENABLE
+ sr \reg, [ARC_REG_PID]
+.endm
+
+#endif /* !__ASSEMBLY__ */
+
+#endif
diff --git a/arch/arc/include/asm/mmu.h b/arch/arc/include/asm/mmu.h
new file mode 100644
index 000000000..ca427c30f
--- /dev/null
+++ b/arch/arc/include/asm/mmu.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef _ASM_ARC_MMU_H
+#define _ASM_ARC_MMU_H
+
+#ifndef __ASSEMBLY__
+
+#include <linux/threads.h> /* NR_CPUS */
+
+typedef struct {
+ unsigned long asid[NR_CPUS]; /* 8 bit MMU PID + Generation cycle */
+} mm_context_t;
+
+#endif
+
+#include <asm/mmu-arcv2.h>
+
+#endif
diff --git a/arch/arc/include/asm/mmu_context.h b/arch/arc/include/asm/mmu_context.h
new file mode 100644
index 000000000..dda471f5f
--- /dev/null
+++ b/arch/arc/include/asm/mmu_context.h
@@ -0,0 +1,174 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * vineetg: May 2011
+ * -Refactored get_new_mmu_context( ) to only handle live-mm.
+ * retiring-mm handled in other hooks
+ *
+ * Vineetg: March 25th, 2008: Bug #92690
+ * -Major rewrite of Core ASID allocation routine get_new_mmu_context
+ *
+ * Amit Bhor, Sameer Dhavale: Codito Technologies 2004
+ */
+
+#ifndef _ASM_ARC_MMU_CONTEXT_H
+#define _ASM_ARC_MMU_CONTEXT_H
+
+#include <linux/sched/mm.h>
+
+#include <asm/tlb.h>
+#include <asm-generic/mm_hooks.h>
+
+/* ARC ASID Management
+ *
+ * MMU tags TLBs with an 8-bit ASID, avoiding need to flush the TLB on
+ * context-switch.
+ *
+ * ASID is managed per cpu, so task threads across CPUs can have different
+ * ASID. Global ASID management is needed if hardware supports TLB shootdown
+ * and/or shared TLB across cores, which ARC doesn't.
+ *
+ * Each task is assigned unique ASID, with a simple round-robin allocator
+ * tracked in @asid_cpu. When 8-bit value rolls over,a new cycle is started
+ * over from 0, and TLB is flushed
+ *
+ * A new allocation cycle, post rollover, could potentially reassign an ASID
+ * to a different task. Thus the rule is to refresh the ASID in a new cycle.
+ * The 32 bit @asid_cpu (and mm->asid) have 8 bits MMU PID and rest 24 bits
+ * serve as cycle/generation indicator and natural 32 bit unsigned math
+ * automagically increments the generation when lower 8 bits rollover.
+ */
+
+#define MM_CTXT_ASID_MASK 0x000000ff /* MMU PID reg :8 bit PID */
+#define MM_CTXT_CYCLE_MASK (~MM_CTXT_ASID_MASK)
+
+#define MM_CTXT_FIRST_CYCLE (MM_CTXT_ASID_MASK + 1)
+#define MM_CTXT_NO_ASID 0UL
+
+#define asid_mm(mm, cpu) mm->context.asid[cpu]
+#define hw_pid(mm, cpu) (asid_mm(mm, cpu) & MM_CTXT_ASID_MASK)
+
+DECLARE_PER_CPU(unsigned int, asid_cache);
+#define asid_cpu(cpu) per_cpu(asid_cache, cpu)
+
+/*
+ * Get a new ASID if task doesn't have a valid one (unalloc or from prev cycle)
+ * Also set the MMU PID register to existing/updated ASID
+ */
+static inline void get_new_mmu_context(struct mm_struct *mm)
+{
+ const unsigned int cpu = smp_processor_id();
+ unsigned long flags;
+
+ local_irq_save(flags);
+
+ /*
+ * Move to new ASID if it was not from current alloc-cycle/generation.
+ * This is done by ensuring that the generation bits in both mm->ASID
+ * and cpu's ASID counter are exactly same.
+ *
+ * Note: Callers needing new ASID unconditionally, independent of
+ * generation, e.g. local_flush_tlb_mm() for forking parent,
+ * first need to destroy the context, setting it to invalid
+ * value.
+ */
+ if (!((asid_mm(mm, cpu) ^ asid_cpu(cpu)) & MM_CTXT_CYCLE_MASK))
+ goto set_hw;
+
+ /* move to new ASID and handle rollover */
+ if (unlikely(!(++asid_cpu(cpu) & MM_CTXT_ASID_MASK))) {
+
+ local_flush_tlb_all();
+
+ /*
+ * Above check for rollover of 8 bit ASID in 32 bit container.
+ * If the container itself wrapped around, set it to a non zero
+ * "generation" to distinguish from no context
+ */
+ if (!asid_cpu(cpu))
+ asid_cpu(cpu) = MM_CTXT_FIRST_CYCLE;
+ }
+
+ /* Assign new ASID to tsk */
+ asid_mm(mm, cpu) = asid_cpu(cpu);
+
+set_hw:
+ mmu_setup_asid(mm, hw_pid(mm, cpu));
+
+ local_irq_restore(flags);
+}
+
+/*
+ * Initialize the context related info for a new mm_struct
+ * instance.
+ */
+#define init_new_context init_new_context
+static inline int
+init_new_context(struct task_struct *tsk, struct mm_struct *mm)
+{
+ int i;
+
+ for_each_possible_cpu(i)
+ asid_mm(mm, i) = MM_CTXT_NO_ASID;
+
+ return 0;
+}
+
+#define destroy_context destroy_context
+static inline void destroy_context(struct mm_struct *mm)
+{
+ unsigned long flags;
+
+ /* Needed to elide CONFIG_DEBUG_PREEMPT warning */
+ local_irq_save(flags);
+ asid_mm(mm, smp_processor_id()) = MM_CTXT_NO_ASID;
+ local_irq_restore(flags);
+}
+
+/* Prepare the MMU for task: setup PID reg with allocated ASID
+ If task doesn't have an ASID (never alloc or stolen, get a new ASID)
+*/
+static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
+ struct task_struct *tsk)
+{
+ const int cpu = smp_processor_id();
+
+ /*
+ * Note that the mm_cpumask is "aggregating" only, we don't clear it
+ * for the switched-out task, unlike some other arches.
+ * It is used to enlist cpus for sending TLB flush IPIs and not sending
+ * it to CPUs where a task once ran-on, could cause stale TLB entry
+ * re-use, specially for a multi-threaded task.
+ * e.g. T1 runs on C1, migrates to C3. T2 running on C2 munmaps.
+ * For a non-aggregating mm_cpumask, IPI not sent C1, and if T1
+ * were to re-migrate to C1, it could access the unmapped region
+ * via any existing stale TLB entries.
+ */
+ cpumask_set_cpu(cpu, mm_cpumask(next));
+
+ mmu_setup_pgd(next, next->pgd);
+
+ get_new_mmu_context(next);
+}
+
+/*
+ * activate_mm defaults (in asm-generic) to switch_mm and is called at the
+ * time of execve() to get a new ASID Note the subtlety here:
+ * get_new_mmu_context() behaves differently here vs. in switch_mm(). Here
+ * it always returns a new ASID, because mm has an unallocated "initial"
+ * value, while in latter, it moves to a new ASID, only if it was
+ * unallocated
+ */
+
+/* it seemed that deactivate_mm( ) is a reasonable place to do book-keeping
+ * for retiring-mm. However destroy_context( ) still needs to do that because
+ * between mm_release( ) = >deactive_mm( ) and
+ * mmput => .. => __mmdrop( ) => destroy_context( )
+ * there is a good chance that task gets sched-out/in, making it's ASID valid
+ * again (this teased me for a whole day).
+ */
+
+#include <asm-generic/mmu_context.h>
+
+#endif /* __ASM_ARC_MMU_CONTEXT_H */
diff --git a/arch/arc/include/asm/module.h b/arch/arc/include/asm/module.h
new file mode 100644
index 000000000..f534a1fef
--- /dev/null
+++ b/arch/arc/include/asm/module.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * Amit Bhor, Sameer Dhavale: Codito Technologies 2004
+ */
+
+#ifndef _ASM_ARC_MODULE_H
+#define _ASM_ARC_MODULE_H
+
+#include <asm-generic/module.h>
+
+struct mod_arch_specific {
+#ifdef CONFIG_ARC_DW2_UNWIND
+ void *unw_info;
+ int unw_sec_idx;
+#endif
+ const char *secstr;
+};
+
+#endif /* _ASM_ARC_MODULE_H */
diff --git a/arch/arc/include/asm/page.h b/arch/arc/include/asm/page.h
new file mode 100644
index 000000000..9a62e1d87
--- /dev/null
+++ b/arch/arc/include/asm/page.h
@@ -0,0 +1,139 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+#ifndef __ASM_ARC_PAGE_H
+#define __ASM_ARC_PAGE_H
+
+#include <uapi/asm/page.h>
+
+#ifdef CONFIG_ARC_HAS_PAE40
+
+#define MAX_POSSIBLE_PHYSMEM_BITS 40
+#define PAGE_MASK_PHYS (0xff00000000ull | PAGE_MASK)
+
+#else /* CONFIG_ARC_HAS_PAE40 */
+
+#define MAX_POSSIBLE_PHYSMEM_BITS 32
+#define PAGE_MASK_PHYS PAGE_MASK
+
+#endif /* CONFIG_ARC_HAS_PAE40 */
+
+#ifndef __ASSEMBLY__
+
+#define clear_page(paddr) memset((paddr), 0, PAGE_SIZE)
+#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
+#define copy_page(to, from) memcpy((to), (from), PAGE_SIZE)
+
+struct vm_area_struct;
+struct page;
+
+#define __HAVE_ARCH_COPY_USER_HIGHPAGE
+
+void copy_user_highpage(struct page *to, struct page *from,
+ unsigned long u_vaddr, struct vm_area_struct *vma);
+void clear_user_page(void *to, unsigned long u_vaddr, struct page *page);
+
+typedef struct {
+ unsigned long pgd;
+} pgd_t;
+
+#define pgd_val(x) ((x).pgd)
+#define __pgd(x) ((pgd_t) { (x) })
+
+#if CONFIG_PGTABLE_LEVELS > 3
+
+typedef struct {
+ unsigned long pud;
+} pud_t;
+
+#define pud_val(x) ((x).pud)
+#define __pud(x) ((pud_t) { (x) })
+
+#endif
+
+#if CONFIG_PGTABLE_LEVELS > 2
+
+typedef struct {
+ unsigned long pmd;
+} pmd_t;
+
+#define pmd_val(x) ((x).pmd)
+#define __pmd(x) ((pmd_t) { (x) })
+
+#endif
+
+typedef struct {
+#ifdef CONFIG_ARC_HAS_PAE40
+ unsigned long long pte;
+#else
+ unsigned long pte;
+#endif
+} pte_t;
+
+#define pte_val(x) ((x).pte)
+#define __pte(x) ((pte_t) { (x) })
+
+typedef struct {
+ unsigned long pgprot;
+} pgprot_t;
+
+#define pgprot_val(x) ((x).pgprot)
+#define __pgprot(x) ((pgprot_t) { (x) })
+#define pte_pgprot(x) __pgprot(pte_val(x))
+
+typedef struct page *pgtable_t;
+
+/*
+ * Use virt_to_pfn with caution:
+ * If used in pte or paddr related macros, it could cause truncation
+ * in PAE40 builds
+ * As a rule of thumb, only use it in helpers starting with virt_
+ * You have been warned !
+ */
+#define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT)
+
+/*
+ * When HIGHMEM is enabled we have holes in the memory map so we need
+ * pfn_valid() that takes into account the actual extents of the physical
+ * memory
+ */
+#ifdef CONFIG_HIGHMEM
+
+extern unsigned long arch_pfn_offset;
+#define ARCH_PFN_OFFSET arch_pfn_offset
+
+extern int pfn_valid(unsigned long pfn);
+#define pfn_valid pfn_valid
+
+#else /* CONFIG_HIGHMEM */
+
+#define ARCH_PFN_OFFSET virt_to_pfn(CONFIG_LINUX_RAM_BASE)
+#define pfn_valid(pfn) (((pfn) - ARCH_PFN_OFFSET) < max_mapnr)
+
+#endif /* CONFIG_HIGHMEM */
+
+/*
+ * __pa, __va, virt_to_page (ALERT: deprecated, don't use them)
+ *
+ * These macros have historically been misnamed
+ * virt here means link-address/program-address as embedded in object code.
+ * And for ARC, link-addr = physical address
+ */
+#define __pa(vaddr) ((unsigned long)(vaddr))
+#define __va(paddr) ((void *)((unsigned long)(paddr)))
+
+#define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr))
+#define virt_addr_valid(kaddr) pfn_valid(virt_to_pfn(kaddr))
+
+/* Default Permissions for stack/heaps pages (Non Executable) */
+#define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_NON_EXEC
+
+#define WANT_PAGE_VIRTUAL 1
+
+#include <asm-generic/memory_model.h> /* page_to_pfn, pfn_to_page */
+#include <asm-generic/getorder.h>
+
+#endif /* !__ASSEMBLY__ */
+
+#endif
diff --git a/arch/arc/include/asm/pci.h b/arch/arc/include/asm/pci.h
new file mode 100644
index 000000000..a6858e111
--- /dev/null
+++ b/arch/arc/include/asm/pci.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2015-2016 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef _ASM_ARC_PCI_H
+#define _ASM_ARC_PCI_H
+
+#ifdef __KERNEL__
+#include <linux/ioport.h>
+
+#define PCIBIOS_MIN_IO 0x100
+#define PCIBIOS_MIN_MEM 0x100000
+
+#define pcibios_assign_all_busses() 1
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_ARC_PCI_H */
diff --git a/arch/arc/include/asm/perf_event.h b/arch/arc/include/asm/perf_event.h
new file mode 100644
index 000000000..d5719a260
--- /dev/null
+++ b/arch/arc/include/asm/perf_event.h
@@ -0,0 +1,70 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Linux performance counter support for ARC
+ *
+ * Copyright (C) 2014-2015 Synopsys, Inc. (www.synopsys.com)
+ * Copyright (C) 2011-2013 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef __ASM_PERF_EVENT_H
+#define __ASM_PERF_EVENT_H
+
+/* Max number of counters that PCT block may ever have */
+#define ARC_PERF_MAX_COUNTERS 32
+
+#define ARC_REG_CC_BUILD 0xF6
+#define ARC_REG_CC_INDEX 0x240
+#define ARC_REG_CC_NAME0 0x241
+#define ARC_REG_CC_NAME1 0x242
+
+#define ARC_REG_PCT_BUILD 0xF5
+#define ARC_REG_PCT_COUNTL 0x250
+#define ARC_REG_PCT_COUNTH 0x251
+#define ARC_REG_PCT_SNAPL 0x252
+#define ARC_REG_PCT_SNAPH 0x253
+#define ARC_REG_PCT_CONFIG 0x254
+#define ARC_REG_PCT_CONTROL 0x255
+#define ARC_REG_PCT_INDEX 0x256
+#define ARC_REG_PCT_INT_CNTL 0x25C
+#define ARC_REG_PCT_INT_CNTH 0x25D
+#define ARC_REG_PCT_INT_CTRL 0x25E
+#define ARC_REG_PCT_INT_ACT 0x25F
+
+#define ARC_REG_PCT_CONFIG_USER (1 << 18) /* count in user mode */
+#define ARC_REG_PCT_CONFIG_KERN (1 << 19) /* count in kernel mode */
+
+#define ARC_REG_PCT_CONTROL_CC (1 << 16) /* clear counts */
+#define ARC_REG_PCT_CONTROL_SN (1 << 17) /* snapshot */
+
+struct arc_reg_pct_build {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned int m:8, c:8, r:5, i:1, s:2, v:8;
+#else
+ unsigned int v:8, s:2, i:1, r:5, c:8, m:8;
+#endif
+};
+
+struct arc_reg_cc_build {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned int c:16, r:8, v:8;
+#else
+ unsigned int v:8, r:8, c:16;
+#endif
+};
+
+#define PERF_COUNT_ARC_DCLM (PERF_COUNT_HW_MAX + 0)
+#define PERF_COUNT_ARC_DCSM (PERF_COUNT_HW_MAX + 1)
+#define PERF_COUNT_ARC_ICM (PERF_COUNT_HW_MAX + 2)
+#define PERF_COUNT_ARC_BPOK (PERF_COUNT_HW_MAX + 3)
+#define PERF_COUNT_ARC_EDTLB (PERF_COUNT_HW_MAX + 4)
+#define PERF_COUNT_ARC_EITLB (PERF_COUNT_HW_MAX + 5)
+#define PERF_COUNT_ARC_LDC (PERF_COUNT_HW_MAX + 6)
+#define PERF_COUNT_ARC_STC (PERF_COUNT_HW_MAX + 7)
+
+#define PERF_COUNT_ARC_HW_MAX (PERF_COUNT_HW_MAX + 8)
+
+#ifdef CONFIG_PERF_EVENTS
+#define perf_arch_bpf_user_pt_regs(regs) (struct user_regs_struct *)regs
+#endif
+
+#endif /* __ASM_PERF_EVENT_H */
diff --git a/arch/arc/include/asm/pgalloc.h b/arch/arc/include/asm/pgalloc.h
new file mode 100644
index 000000000..096b8ef58
--- /dev/null
+++ b/arch/arc/include/asm/pgalloc.h
@@ -0,0 +1,97 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * vineetg: June 2011
+ * -"/proc/meminfo | grep PageTables" kept on increasing
+ * Recently added pgtable dtor was not getting called.
+ *
+ * vineetg: May 2011
+ * -Variable pg-sz means that Page Tables could be variable sized themselves
+ * So calculate it based on addr traversal split [pgd-bits:pte-bits:xxx]
+ * -Page Table size capped to max 1 to save memory - hence verified.
+ * -Since these deal with constants, gcc compile-time optimizes them.
+ *
+ * vineetg: Nov 2010
+ * -Added pgtable ctor/dtor used for pgtable mem accounting
+ *
+ * vineetg: April 2010
+ * -Switched pgtable_t from being struct page * to unsigned long
+ * =Needed so that Page Table allocator (pte_alloc_one) is not forced to
+ * deal with struct page. That way in future we can make it allocate
+ * multiple PG Tbls in one Page Frame
+ * =sweet side effect is avoiding calls to ugly page_address( ) from the
+ * pg-tlb allocator sub-sys (pte_alloc_one, ptr_free, pmd_populate)
+ *
+ * Amit Bhor, Sameer Dhavale: Codito Technologies 2004
+ */
+
+#ifndef _ASM_ARC_PGALLOC_H
+#define _ASM_ARC_PGALLOC_H
+
+#include <linux/mm.h>
+#include <linux/log2.h>
+#include <asm-generic/pgalloc.h>
+
+static inline void
+pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
+{
+ /*
+ * The cast to long below is OK in 32-bit PAE40 regime with long long pte
+ * Despite "wider" pte, the pte table needs to be in non-PAE low memory
+ * as all higher levels can only hold long pointers.
+ *
+ * The cast itself is needed given simplistic definition of set_pmd()
+ */
+ set_pmd(pmd, __pmd((unsigned long)pte));
+}
+
+static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t pte_page)
+{
+ set_pmd(pmd, __pmd((unsigned long)page_address(pte_page)));
+}
+
+static inline pgd_t *pgd_alloc(struct mm_struct *mm)
+{
+ pgd_t *ret = (pgd_t *) __get_free_page(GFP_KERNEL);
+
+ if (ret) {
+ int num, num2;
+ num = USER_PTRS_PER_PGD + USER_KERNEL_GUTTER / PGDIR_SIZE;
+ memzero(ret, num * sizeof(pgd_t));
+
+ num2 = VMALLOC_SIZE / PGDIR_SIZE;
+ memcpy(ret + num, swapper_pg_dir + num, num2 * sizeof(pgd_t));
+
+ memzero(ret + num + num2,
+ (PTRS_PER_PGD - num - num2) * sizeof(pgd_t));
+
+ }
+ return ret;
+}
+
+#if CONFIG_PGTABLE_LEVELS > 3
+
+static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4dp, pud_t *pudp)
+{
+ set_p4d(p4dp, __p4d((unsigned long)pudp));
+}
+
+#define __pud_free_tlb(tlb, pmd, addr) pud_free((tlb)->mm, pmd)
+
+#endif
+
+#if CONFIG_PGTABLE_LEVELS > 2
+
+static inline void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmdp)
+{
+ set_pud(pudp, __pud((unsigned long)pmdp));
+}
+
+#define __pmd_free_tlb(tlb, pmd, addr) pmd_free((tlb)->mm, pmd)
+
+#endif
+
+#define __pte_free_tlb(tlb, pte, addr) pte_free((tlb)->mm, pte)
+
+#endif /* _ASM_ARC_PGALLOC_H */
diff --git a/arch/arc/include/asm/pgtable-bits-arcv2.h b/arch/arc/include/asm/pgtable-bits-arcv2.h
new file mode 100644
index 000000000..b23be5574
--- /dev/null
+++ b/arch/arc/include/asm/pgtable-bits-arcv2.h
@@ -0,0 +1,131 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+/*
+ * page table flags for software walked/managed MMUv3 (ARC700) and MMUv4 (HS)
+ * There correspond to the corresponding bits in the TLB
+ */
+
+#ifndef _ASM_ARC_PGTABLE_BITS_ARCV2_H
+#define _ASM_ARC_PGTABLE_BITS_ARCV2_H
+
+#ifdef CONFIG_ARC_CACHE_PAGES
+#define _PAGE_CACHEABLE (1 << 0) /* Cached (H) */
+#else
+#define _PAGE_CACHEABLE 0
+#endif
+
+#define _PAGE_EXECUTE (1 << 1) /* User Execute (H) */
+#define _PAGE_WRITE (1 << 2) /* User Write (H) */
+#define _PAGE_READ (1 << 3) /* User Read (H) */
+#define _PAGE_ACCESSED (1 << 4) /* Accessed (s) */
+#define _PAGE_DIRTY (1 << 5) /* Modified (s) */
+#define _PAGE_SPECIAL (1 << 6)
+#define _PAGE_GLOBAL (1 << 8) /* ASID agnostic (H) */
+#define _PAGE_PRESENT (1 << 9) /* PTE/TLB Valid (H) */
+
+#ifdef CONFIG_ARC_MMU_V4
+#define _PAGE_HW_SZ (1 << 10) /* Normal/super (H) */
+#else
+#define _PAGE_HW_SZ 0
+#endif
+
+/* Defaults for every user page */
+#define ___DEF (_PAGE_PRESENT | _PAGE_CACHEABLE)
+
+/* Set of bits not changed in pte_modify */
+#define _PAGE_CHG_MASK (PAGE_MASK_PHYS | _PAGE_ACCESSED | _PAGE_DIRTY | \
+ _PAGE_SPECIAL)
+
+/* More Abbrevaited helpers */
+#define PAGE_U_NONE __pgprot(___DEF)
+#define PAGE_U_R __pgprot(___DEF | _PAGE_READ)
+#define PAGE_U_W_R __pgprot(___DEF | _PAGE_READ | _PAGE_WRITE)
+#define PAGE_U_X_R __pgprot(___DEF | _PAGE_READ | _PAGE_EXECUTE)
+#define PAGE_U_X_W_R __pgprot(___DEF \
+ | _PAGE_READ | _PAGE_WRITE | _PAGE_EXECUTE)
+#define PAGE_KERNEL __pgprot(___DEF | _PAGE_GLOBAL \
+ | _PAGE_READ | _PAGE_WRITE | _PAGE_EXECUTE)
+
+#define PAGE_SHARED PAGE_U_W_R
+
+#define pgprot_noncached(prot) (__pgprot(pgprot_val(prot) & ~_PAGE_CACHEABLE))
+
+/*
+ * Mapping of vm_flags (Generic VM) to PTE flags (arch specific)
+ *
+ * Certain cases have 1:1 mapping
+ * e.g. __P101 means VM_READ, VM_EXEC and !VM_SHARED
+ * which directly corresponds to PAGE_U_X_R
+ *
+ * Other rules which cause the divergence from 1:1 mapping
+ *
+ * 1. Although ARC700 can do exclusive execute/write protection (meaning R
+ * can be tracked independet of X/W unlike some other CPUs), still to
+ * keep things consistent with other archs:
+ * -Write implies Read: W => R
+ * -Execute implies Read: X => R
+ *
+ * 2. Pvt Writable doesn't have Write Enabled initially: Pvt-W => !W
+ * This is to enable COW mechanism
+ */
+ /* xwr */
+#ifndef __ASSEMBLY__
+
+#define pte_write(pte) (pte_val(pte) & _PAGE_WRITE)
+#define pte_dirty(pte) (pte_val(pte) & _PAGE_DIRTY)
+#define pte_young(pte) (pte_val(pte) & _PAGE_ACCESSED)
+#define pte_special(pte) (pte_val(pte) & _PAGE_SPECIAL)
+
+#define PTE_BIT_FUNC(fn, op) \
+ static inline pte_t pte_##fn(pte_t pte) { pte_val(pte) op; return pte; }
+
+PTE_BIT_FUNC(mknotpresent, &= ~(_PAGE_PRESENT));
+PTE_BIT_FUNC(wrprotect, &= ~(_PAGE_WRITE));
+PTE_BIT_FUNC(mkwrite, |= (_PAGE_WRITE));
+PTE_BIT_FUNC(mkclean, &= ~(_PAGE_DIRTY));
+PTE_BIT_FUNC(mkdirty, |= (_PAGE_DIRTY));
+PTE_BIT_FUNC(mkold, &= ~(_PAGE_ACCESSED));
+PTE_BIT_FUNC(mkyoung, |= (_PAGE_ACCESSED));
+PTE_BIT_FUNC(mkspecial, |= (_PAGE_SPECIAL));
+PTE_BIT_FUNC(mkhuge, |= (_PAGE_HW_SZ));
+
+static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
+{
+ return __pte((pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot));
+}
+
+static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
+ pte_t *ptep, pte_t pteval)
+{
+ set_pte(ptep, pteval);
+}
+
+void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
+ pte_t *ptep);
+
+/* Encode swap {type,off} tuple into PTE
+ * We reserve 13 bits for 5-bit @type, keeping bits 12-5 zero, ensuring that
+ * PAGE_PRESENT is zero in a PTE holding swap "identifier"
+ */
+#define __swp_entry(type, off) ((swp_entry_t) \
+ { ((type) & 0x1f) | ((off) << 13) })
+
+/* Decode a PTE containing swap "identifier "into constituents */
+#define __swp_type(pte_lookalike) (((pte_lookalike).val) & 0x1f)
+#define __swp_offset(pte_lookalike) ((pte_lookalike).val >> 13)
+
+#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
+#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
+
+#define kern_addr_valid(addr) (1)
+
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+#include <asm/hugepage.h>
+#endif
+
+#endif /* __ASSEMBLY__ */
+
+#endif
diff --git a/arch/arc/include/asm/pgtable-levels.h b/arch/arc/include/asm/pgtable-levels.h
new file mode 100644
index 000000000..ef68758b6
--- /dev/null
+++ b/arch/arc/include/asm/pgtable-levels.h
@@ -0,0 +1,187 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2020 Synopsys, Inc. (www.synopsys.com)
+ */
+
+/*
+ * Helpers for implemenintg paging levels
+ */
+
+#ifndef _ASM_ARC_PGTABLE_LEVELS_H
+#define _ASM_ARC_PGTABLE_LEVELS_H
+
+#if CONFIG_PGTABLE_LEVELS == 2
+
+/*
+ * 2 level paging setup for software walked MMUv3 (ARC700) and MMUv4 (HS)
+ *
+ * [31] 32 bit virtual address [0]
+ * -------------------------------------------------------
+ * | | <---------- PGDIR_SHIFT ----------> |
+ * | | | <-- PAGE_SHIFT --> |
+ * -------------------------------------------------------
+ * | | |
+ * | | --> off in page frame
+ * | ---> index into Page Table
+ * ----> index into Page Directory
+ *
+ * Given software walk, the vaddr split is arbitrary set to 11:8:13
+ * However enabling of super page in a 2 level regime pegs PGDIR_SHIFT to
+ * super page size.
+ */
+
+#if defined(CONFIG_ARC_HUGEPAGE_16M)
+#define PGDIR_SHIFT 24
+#elif defined(CONFIG_ARC_HUGEPAGE_2M)
+#define PGDIR_SHIFT 21
+#else
+/*
+ * No Super page case
+ * Default value provides 11:8:13 (8K), 10:10:12 (4K)
+ * Limits imposed by pgtable_t only PAGE_SIZE long
+ * (so 4K page can only have 1K entries: or 10 bits)
+ */
+#ifdef CONFIG_ARC_PAGE_SIZE_4K
+#define PGDIR_SHIFT 22
+#else
+#define PGDIR_SHIFT 21
+#endif
+
+#endif
+
+#else /* CONFIG_PGTABLE_LEVELS != 2 */
+
+/*
+ * A default 3 level paging testing setup in software walked MMU
+ * MMUv4 (8K page): <4> : <7> : <8> : <13>
+ * A default 4 level paging testing setup in software walked MMU
+ * MMUv4 (8K page): <4> : <3> : <4> : <8> : <13>
+ */
+#define PGDIR_SHIFT 28
+#if CONFIG_PGTABLE_LEVELS > 3
+#define PUD_SHIFT 25
+#endif
+#if CONFIG_PGTABLE_LEVELS > 2
+#define PMD_SHIFT 21
+#endif
+
+#endif /* CONFIG_PGTABLE_LEVELS */
+
+#define PGDIR_SIZE BIT(PGDIR_SHIFT)
+#define PGDIR_MASK (~(PGDIR_SIZE - 1))
+#define PTRS_PER_PGD BIT(32 - PGDIR_SHIFT)
+
+#if CONFIG_PGTABLE_LEVELS > 3
+#define PUD_SIZE BIT(PUD_SHIFT)
+#define PUD_MASK (~(PUD_SIZE - 1))
+#define PTRS_PER_PUD BIT(PGDIR_SHIFT - PUD_SHIFT)
+#endif
+
+#if CONFIG_PGTABLE_LEVELS > 2
+#define PMD_SIZE BIT(PMD_SHIFT)
+#define PMD_MASK (~(PMD_SIZE - 1))
+#define PTRS_PER_PMD BIT(PUD_SHIFT - PMD_SHIFT)
+#endif
+
+#define PTRS_PER_PTE BIT(PMD_SHIFT - PAGE_SHIFT)
+
+#ifndef __ASSEMBLY__
+
+#if CONFIG_PGTABLE_LEVELS > 3
+#include <asm-generic/pgtable-nop4d.h>
+#elif CONFIG_PGTABLE_LEVELS > 2
+#include <asm-generic/pgtable-nopud.h>
+#else
+#include <asm-generic/pgtable-nopmd.h>
+#endif
+
+/*
+ * 1st level paging: pgd
+ */
+#define pgd_ERROR(e) \
+ pr_crit("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
+
+#if CONFIG_PGTABLE_LEVELS > 3
+
+/* In 4 level paging, p4d_* macros work on pgd */
+#define p4d_none(x) (!p4d_val(x))
+#define p4d_bad(x) ((p4d_val(x) & ~PAGE_MASK))
+#define p4d_present(x) (p4d_val(x))
+#define p4d_clear(xp) do { p4d_val(*(xp)) = 0; } while (0)
+#define p4d_pgtable(p4d) ((pud_t *)(p4d_val(p4d) & PAGE_MASK))
+#define p4d_page(p4d) virt_to_page(p4d_pgtable(p4d))
+#define set_p4d(p4dp, p4d) (*(p4dp) = p4d)
+
+/*
+ * 2nd level paging: pud
+ */
+#define pud_ERROR(e) \
+ pr_crit("%s:%d: bad pud %08lx.\n", __FILE__, __LINE__, pud_val(e))
+
+#endif
+
+#if CONFIG_PGTABLE_LEVELS > 2
+
+/*
+ * In 3 level paging, pud_* macros work on pgd
+ * In 4 level paging, pud_* macros work on pud
+ */
+#define pud_none(x) (!pud_val(x))
+#define pud_bad(x) ((pud_val(x) & ~PAGE_MASK))
+#define pud_present(x) (pud_val(x))
+#define pud_clear(xp) do { pud_val(*(xp)) = 0; } while (0)
+#define pud_pgtable(pud) ((pmd_t *)(pud_val(pud) & PAGE_MASK))
+#define pud_page(pud) virt_to_page(pud_pgtable(pud))
+#define set_pud(pudp, pud) (*(pudp) = pud)
+
+/*
+ * 3rd level paging: pmd
+ */
+#define pmd_ERROR(e) \
+ pr_crit("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e))
+
+#define pmd_pfn(pmd) ((pmd_val(pmd) & PMD_MASK) >> PAGE_SHIFT)
+#define pfn_pmd(pfn,prot) __pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
+#define mk_pmd(page,prot) pfn_pmd(page_to_pfn(page),prot)
+
+#endif
+
+/*
+ * Due to the strange way generic pgtable level folding works, the pmd_* macros
+ * - are valid even for 2 levels (which supposedly only has pgd - pte)
+ * - behave differently for 2 vs. 3
+ * In 2 level paging (pgd -> pte), pmd_* macros work on pgd
+ * In 3+ level paging (pgd -> pmd -> pte), pmd_* macros work on pmd
+ */
+#define pmd_none(x) (!pmd_val(x))
+#define pmd_bad(x) ((pmd_val(x) & ~PAGE_MASK))
+#define pmd_present(x) (pmd_val(x))
+#define pmd_clear(xp) do { pmd_val(*(xp)) = 0; } while (0)
+#define pmd_page_vaddr(pmd) (pmd_val(pmd) & PAGE_MASK)
+#define pmd_pfn(pmd) ((pmd_val(pmd) & PAGE_MASK) >> PAGE_SHIFT)
+#define pmd_page(pmd) virt_to_page(pmd_page_vaddr(pmd))
+#define set_pmd(pmdp, pmd) (*(pmdp) = pmd)
+#define pmd_pgtable(pmd) ((pgtable_t) pmd_page(pmd))
+
+/*
+ * 4th level paging: pte
+ */
+#define pte_ERROR(e) \
+ pr_crit("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
+
+#define pte_none(x) (!pte_val(x))
+#define pte_present(x) (pte_val(x) & _PAGE_PRESENT)
+#define pte_clear(mm,addr,ptep) set_pte_at(mm, addr, ptep, __pte(0))
+#define pte_page(pte) pfn_to_page(pte_pfn(pte))
+#define set_pte(ptep, pte) ((*(ptep)) = (pte))
+#define pte_pfn(pte) (pte_val(pte) >> PAGE_SHIFT)
+#define pfn_pte(pfn, prot) __pte(__pfn_to_phys(pfn) | pgprot_val(prot))
+#define mk_pte(page, prot) pfn_pte(page_to_pfn(page), prot)
+
+#ifdef CONFIG_ISA_ARCV2
+#define pmd_leaf(x) (pmd_val(x) & _PAGE_HW_SZ)
+#endif
+
+#endif /* !__ASSEMBLY__ */
+
+#endif
diff --git a/arch/arc/include/asm/pgtable.h b/arch/arc/include/asm/pgtable.h
new file mode 100644
index 000000000..4cf45a99f
--- /dev/null
+++ b/arch/arc/include/asm/pgtable.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef _ASM_ARC_PGTABLE_H
+#define _ASM_ARC_PGTABLE_H
+
+#include <linux/bits.h>
+
+#include <asm/pgtable-levels.h>
+#include <asm/pgtable-bits-arcv2.h>
+#include <asm/page.h>
+#include <asm/mmu.h>
+
+/*
+ * Number of entries a user land program use.
+ * TASK_SIZE is the maximum vaddr that can be used by a userland program.
+ */
+#define USER_PTRS_PER_PGD (TASK_SIZE / PGDIR_SIZE)
+
+#ifndef __ASSEMBLY__
+
+extern char empty_zero_page[PAGE_SIZE];
+#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
+
+extern pgd_t swapper_pg_dir[] __aligned(PAGE_SIZE);
+
+/* to cope with aliasing VIPT cache */
+#define HAVE_ARCH_UNMAPPED_AREA
+
+#endif /* __ASSEMBLY__ */
+
+#endif
diff --git a/arch/arc/include/asm/processor.h b/arch/arc/include/asm/processor.h
new file mode 100644
index 000000000..fb844fce1
--- /dev/null
+++ b/arch/arc/include/asm/processor.h
@@ -0,0 +1,107 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * vineetg: March 2009
+ * -Implemented task_pt_regs( )
+ *
+ * Amit Bhor, Sameer Dhavale, Ashwin Chaugule: Codito Technologies 2004
+ */
+
+#ifndef __ASM_ARC_PROCESSOR_H
+#define __ASM_ARC_PROCESSOR_H
+
+#ifndef __ASSEMBLY__
+
+#include <asm/ptrace.h>
+#include <asm/dsp.h>
+#include <asm/fpu.h>
+
+/* Arch specific stuff which needs to be saved per task.
+ * However these items are not so important so as to earn a place in
+ * struct thread_info
+ */
+struct thread_struct {
+ unsigned long ksp; /* kernel mode stack pointer */
+ unsigned long callee_reg; /* pointer to callee regs */
+ unsigned long fault_address; /* dbls as brkpt holder as well */
+#ifdef CONFIG_ARC_DSP_SAVE_RESTORE_REGS
+ struct dsp_callee_regs dsp;
+#endif
+#ifdef CONFIG_ARC_FPU_SAVE_RESTORE
+ struct arc_fpu fpu;
+#endif
+};
+
+#define INIT_THREAD { \
+ .ksp = sizeof(init_stack) + (unsigned long) init_stack, \
+}
+
+/* Forward declaration, a strange C thing */
+struct task_struct;
+
+#define task_pt_regs(p) \
+ ((struct pt_regs *)(THREAD_SIZE + (void *)task_stack_page(p)) - 1)
+
+/*
+ * A lot of busy-wait loops in SMP are based off of non-volatile data otherwise
+ * get optimised away by gcc
+ */
+#define cpu_relax() barrier()
+
+#define KSTK_EIP(tsk) (task_pt_regs(tsk)->ret)
+#define KSTK_ESP(tsk) (task_pt_regs(tsk)->sp)
+
+/*
+ * Where about of Task's sp, fp, blink when it was last seen in kernel mode.
+ * Look in process.c for details of kernel stack layout
+ */
+#define TSK_K_ESP(tsk) (tsk->thread.ksp)
+
+#define TSK_K_REG(tsk, off) (*((unsigned long *)(TSK_K_ESP(tsk) + \
+ sizeof(struct callee_regs) + off)))
+
+#define TSK_K_BLINK(tsk) TSK_K_REG(tsk, 4)
+#define TSK_K_FP(tsk) TSK_K_REG(tsk, 0)
+
+extern void start_thread(struct pt_regs * regs, unsigned long pc,
+ unsigned long usp);
+
+extern unsigned int __get_wchan(struct task_struct *p);
+
+#endif /* !__ASSEMBLY__ */
+
+/*
+ * Default System Memory Map on ARC
+ *
+ * ---------------------------- (lower 2G, Translated) -------------------------
+ * 0x0000_0000 0x5FFF_FFFF (user vaddr: TASK_SIZE)
+ * 0x6000_0000 0x6FFF_FFFF (reserved gutter between U/K)
+ * 0x7000_0000 0x7FFF_FFFF (kvaddr: vmalloc/modules/pkmap..)
+ *
+ * PAGE_OFFSET ---------------- (Upper 2G, Untranslated) -----------------------
+ * 0x8000_0000 0xBFFF_FFFF (kernel direct mapped)
+ * 0xC000_0000 0xFFFF_FFFF (peripheral uncached space)
+ * -----------------------------------------------------------------------------
+ */
+
+#define TASK_SIZE 0x60000000
+
+#define VMALLOC_START (PAGE_OFFSET - (CONFIG_ARC_KVADDR_SIZE << 20))
+
+/* 1 PGDIR_SIZE each for fixmap/pkmap, 2 PGDIR_SIZE gutter (see asm/highmem.h) */
+#define VMALLOC_SIZE ((CONFIG_ARC_KVADDR_SIZE << 20) - PMD_SIZE * 4)
+
+#define VMALLOC_END (VMALLOC_START + VMALLOC_SIZE)
+
+#define USER_KERNEL_GUTTER (VMALLOC_START - TASK_SIZE)
+
+#define STACK_TOP TASK_SIZE
+#define STACK_TOP_MAX STACK_TOP
+
+/* This decides where the kernel will search for a free chunk of vm
+ * space during mmap's.
+ */
+#define TASK_UNMAPPED_BASE (TASK_SIZE / 3)
+
+#endif /* __ASM_ARC_PROCESSOR_H */
diff --git a/arch/arc/include/asm/ptrace.h b/arch/arc/include/asm/ptrace.h
new file mode 100644
index 000000000..5869a74c0
--- /dev/null
+++ b/arch/arc/include/asm/ptrace.h
@@ -0,0 +1,186 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * Amit Bhor, Sameer Dhavale: Codito Technologies 2004
+ */
+#ifndef __ASM_ARC_PTRACE_H
+#define __ASM_ARC_PTRACE_H
+
+#include <uapi/asm/ptrace.h>
+#include <linux/compiler.h>
+
+#ifndef __ASSEMBLY__
+
+/* THE pt_regs: Defines how regs are saved during entry into kernel */
+
+#ifdef CONFIG_ISA_ARCOMPACT
+struct pt_regs {
+
+ /* Real registers */
+ unsigned long bta; /* bta_l1, bta_l2, erbta */
+
+ unsigned long lp_start, lp_end, lp_count;
+
+ unsigned long status32; /* status32_l1, status32_l2, erstatus */
+ unsigned long ret; /* ilink1, ilink2 or eret */
+ unsigned long blink;
+ unsigned long fp;
+ unsigned long r26; /* gp */
+
+ unsigned long r12, r11, r10, r9, r8, r7, r6, r5, r4, r3, r2, r1, r0;
+
+ unsigned long sp; /* User/Kernel depending on where we came from */
+ unsigned long orig_r0;
+
+ /*
+ * To distinguish bet excp, syscall, irq
+ * For traps and exceptions, Exception Cause Register.
+ * ECR: <00> <VV> <CC> <PP>
+ * Last word used by Linux for extra state mgmt (syscall-restart)
+ * For interrupts, use artificial ECR values to note current prio-level
+ */
+ union {
+ struct {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned long state:8, ecr_vec:8,
+ ecr_cause:8, ecr_param:8;
+#else
+ unsigned long ecr_param:8, ecr_cause:8,
+ ecr_vec:8, state:8;
+#endif
+ };
+ unsigned long event;
+ };
+
+ unsigned long user_r25;
+};
+
+#define MAX_REG_OFFSET offsetof(struct pt_regs, user_r25)
+
+#else
+
+struct pt_regs {
+
+ unsigned long orig_r0;
+
+ union {
+ struct {
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ unsigned long state:8, ecr_vec:8,
+ ecr_cause:8, ecr_param:8;
+#else
+ unsigned long ecr_param:8, ecr_cause:8,
+ ecr_vec:8, state:8;
+#endif
+ };
+ unsigned long event;
+ };
+
+ unsigned long bta; /* bta_l1, bta_l2, erbta */
+
+ unsigned long user_r25;
+
+ unsigned long r26; /* gp */
+ unsigned long fp;
+ unsigned long sp; /* user/kernel sp depending on where we came from */
+
+ unsigned long r12, r30;
+
+#ifdef CONFIG_ARC_HAS_ACCL_REGS
+ unsigned long r58, r59; /* ACCL/ACCH used by FPU / DSP MPY */
+#endif
+#ifdef CONFIG_ARC_DSP_SAVE_RESTORE_REGS
+ unsigned long DSP_CTRL;
+#endif
+
+ /*------- Below list auto saved by h/w -----------*/
+ unsigned long r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11;
+
+ unsigned long blink;
+ unsigned long lp_end, lp_start, lp_count;
+
+ unsigned long ei, ldi, jli;
+
+ unsigned long ret;
+ unsigned long status32;
+};
+
+#define MAX_REG_OFFSET offsetof(struct pt_regs, status32)
+
+#endif
+
+/* Callee saved registers - need to be saved only when you are scheduled out */
+
+struct callee_regs {
+ unsigned long r25, r24, r23, r22, r21, r20, r19, r18, r17, r16, r15, r14, r13;
+};
+
+#define instruction_pointer(regs) ((regs)->ret)
+#define profile_pc(regs) instruction_pointer(regs)
+
+/* return 1 if user mode or 0 if kernel mode */
+#define user_mode(regs) (regs->status32 & STATUS_U_MASK)
+
+#define user_stack_pointer(regs)\
+({ unsigned int sp; \
+ if (user_mode(regs)) \
+ sp = (regs)->sp;\
+ else \
+ sp = -1; \
+ sp; \
+})
+
+/* return 1 if PC in delay slot */
+#define delay_mode(regs) ((regs->status32 & STATUS_DE_MASK) == STATUS_DE_MASK)
+
+#define in_syscall(regs) ((regs->ecr_vec == ECR_V_TRAP) && !regs->ecr_param)
+#define in_brkpt_trap(regs) ((regs->ecr_vec == ECR_V_TRAP) && regs->ecr_param)
+
+#define STATE_SCALL_RESTARTED 0x01
+
+#define syscall_wont_restart(reg) (reg->state |= STATE_SCALL_RESTARTED)
+#define syscall_restartable(reg) !(reg->state & STATE_SCALL_RESTARTED)
+
+#define current_pt_regs() \
+({ \
+ /* open-coded current_thread_info() */ \
+ register unsigned long sp asm ("sp"); \
+ unsigned long pg_start = (sp & ~(THREAD_SIZE - 1)); \
+ (struct pt_regs *)(pg_start + THREAD_SIZE) - 1; \
+})
+
+static inline long regs_return_value(struct pt_regs *regs)
+{
+ return (long)regs->r0;
+}
+
+static inline void instruction_pointer_set(struct pt_regs *regs,
+ unsigned long val)
+{
+ instruction_pointer(regs) = val;
+}
+
+static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
+{
+ return regs->sp;
+}
+
+extern int regs_query_register_offset(const char *name);
+extern const char *regs_query_register_name(unsigned int offset);
+extern bool regs_within_kernel_stack(struct pt_regs *regs, unsigned long addr);
+extern unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs,
+ unsigned int n);
+
+static inline unsigned long regs_get_register(struct pt_regs *regs,
+ unsigned int offset)
+{
+ if (unlikely(offset > MAX_REG_OFFSET))
+ return 0;
+
+ return *(unsigned long *)((unsigned long)regs + offset);
+}
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* __ASM_PTRACE_H */
diff --git a/arch/arc/include/asm/sections.h b/arch/arc/include/asm/sections.h
new file mode 100644
index 000000000..860b4fd67
--- /dev/null
+++ b/arch/arc/include/asm/sections.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef _ASM_ARC_SECTIONS_H
+#define _ASM_ARC_SECTIONS_H
+
+#include <asm-generic/sections.h>
+
+extern char __arc_dccm_base[];
+
+#endif
diff --git a/arch/arc/include/asm/serial.h b/arch/arc/include/asm/serial.h
new file mode 100644
index 000000000..83062c8b9
--- /dev/null
+++ b/arch/arc/include/asm/serial.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef _ASM_ARC_SERIAL_H
+#define _ASM_ARC_SERIAL_H
+
+/*
+ * early 8250 (now earlycon) requires BASE_BAUD to be defined in this header.
+ * However to still determine it dynamically (for multi-platform images)
+ * we do this in a helper by parsing the FDT early
+ */
+
+extern unsigned int __init arc_early_base_baud(void);
+
+#define BASE_BAUD arc_early_base_baud()
+
+#endif /* _ASM_ARC_SERIAL_H */
diff --git a/arch/arc/include/asm/setup.h b/arch/arc/include/asm/setup.h
new file mode 100644
index 000000000..028a8cf76
--- /dev/null
+++ b/arch/arc/include/asm/setup.h
@@ -0,0 +1,45 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+#ifndef __ASM_ARC_SETUP_H
+#define __ASM_ARC_SETUP_H
+
+
+#include <linux/types.h>
+#include <uapi/asm/setup.h>
+
+#define COMMAND_LINE_SIZE 256
+
+/*
+ * Data structure to map a ID to string
+ * Used a lot for bootup reporting of hardware diversity
+ */
+struct id_to_str {
+ int id;
+ const char *str;
+};
+
+extern int root_mountflags, end_mem;
+
+void setup_processor(void);
+void __init setup_arch_memory(void);
+long __init arc_get_mem_sz(void);
+
+/* Helpers used in arc_*_mumbojumbo routines */
+#define IS_AVAIL1(v, s) ((v) ? s : "")
+#define IS_DISABLED_RUN(v) ((v) ? "" : "(disabled) ")
+#define IS_USED_RUN(v) ((v) ? "" : "(not used) ")
+#define IS_USED_CFG(cfg) IS_USED_RUN(IS_ENABLED(cfg))
+#define IS_AVAIL2(v, s, cfg) IS_AVAIL1(v, s), IS_AVAIL1(v, IS_USED_CFG(cfg))
+#define IS_AVAIL3(v, v2, s) IS_AVAIL1(v, s), IS_AVAIL1(v, IS_DISABLED_RUN(v2))
+
+extern void arc_mmu_init(void);
+extern char *arc_mmu_mumbojumbo(int cpu_id, char *buf, int len);
+extern void read_decode_mmu_bcr(void);
+
+extern void arc_cache_init(void);
+extern char *arc_cache_mumbojumbo(int cpu_id, char *buf, int len);
+extern void read_decode_cache_bcr(void);
+
+#endif /* __ASMARC_SETUP_H */
diff --git a/arch/arc/include/asm/shmparam.h b/arch/arc/include/asm/shmparam.h
new file mode 100644
index 000000000..8b0251464
--- /dev/null
+++ b/arch/arc/include/asm/shmparam.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2013 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef __ARC_ASM_SHMPARAM_H
+#define __ARC_ASM_SHMPARAM_H
+
+/* Handle upto 2 cache bins */
+#define SHMLBA (2 * PAGE_SIZE)
+
+/* Enforce SHMLBA in shmat */
+#define __ARCH_FORCE_SHMLBA
+
+#endif
diff --git a/arch/arc/include/asm/smp.h b/arch/arc/include/asm/smp.h
new file mode 100644
index 000000000..d85649160
--- /dev/null
+++ b/arch/arc/include/asm/smp.h
@@ -0,0 +1,128 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef __ASM_ARC_SMP_H
+#define __ASM_ARC_SMP_H
+
+#ifdef CONFIG_SMP
+
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/threads.h>
+
+#define raw_smp_processor_id() (current_thread_info()->cpu)
+
+/* including cpumask.h leads to cyclic deps hence this Forward declaration */
+struct cpumask;
+
+/*
+ * APIs provided by arch SMP code to generic code
+ */
+extern void arch_send_call_function_single_ipi(int cpu);
+extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
+
+/*
+ * APIs provided by arch SMP code to rest of arch code
+ */
+extern void __init smp_init_cpus(void);
+extern void first_lines_of_secondary(void);
+extern const char *arc_platform_smp_cpuinfo(void);
+
+/*
+ * API expected BY platform smp code (FROM arch smp code)
+ *
+ * smp_ipi_irq_setup:
+ * Takes @cpu and @hwirq to which the arch-common ISR is hooked up
+ */
+extern int smp_ipi_irq_setup(int cpu, irq_hw_number_t hwirq);
+
+/*
+ * struct plat_smp_ops - SMP callbacks provided by platform to ARC SMP
+ *
+ * @info: SoC SMP specific info for /proc/cpuinfo etc
+ * @init_early_smp: A SMP specific h/w block can init itself
+ * Could be common across platforms so not covered by
+ * mach_desc->init_early()
+ * @init_per_cpu: Called for each core so SMP h/w block driver can do
+ * any needed setup per cpu (e.g. IPI request)
+ * @cpu_kick: For Master to kickstart a cpu (optionally at a PC)
+ * @ipi_send: To send IPI to a @cpu
+ * @ips_clear: To clear IPI received at @irq
+ */
+struct plat_smp_ops {
+ const char *info;
+ void (*init_early_smp)(void);
+ void (*init_per_cpu)(int cpu);
+ void (*cpu_kick)(int cpu, unsigned long pc);
+ void (*ipi_send)(int cpu);
+ void (*ipi_clear)(int irq);
+};
+
+/* TBD: stop exporting it for direct population by platform */
+extern struct plat_smp_ops plat_smp_ops;
+
+#else /* CONFIG_SMP */
+
+static inline void smp_init_cpus(void) {}
+static inline const char *arc_platform_smp_cpuinfo(void)
+{
+ return "";
+}
+
+#endif /* !CONFIG_SMP */
+
+/*
+ * ARC700 doesn't support atomic Read-Modify-Write ops.
+ * Originally Interrupts had to be disabled around code to gaurantee atomicity.
+ * The LLOCK/SCOND insns allow writing interrupt-hassle-free based atomic ops
+ * based on retry-if-irq-in-atomic (with hardware assist).
+ * However despite these, we provide the IRQ disabling variant
+ *
+ * (1) These insn were introduced only in 4.10 release. So for older released
+ * support needed.
+ *
+ * (2) In a SMP setup, the LLOCK/SCOND atomicity across CPUs needs to be
+ * gaurantted by the platform (not something which core handles).
+ * Assuming a platform won't, SMP Linux needs to use spinlocks + local IRQ
+ * disabling for atomicity.
+ *
+ * However exported spinlock API is not usable due to cyclic hdr deps
+ * (even after system.h disintegration upstream)
+ * asm/bitops.h -> linux/spinlock.h -> linux/preempt.h
+ * -> linux/thread_info.h -> linux/bitops.h -> asm/bitops.h
+ *
+ * So the workaround is to use the lowest level arch spinlock API.
+ * The exported spinlock API is smart enough to be NOP for !CONFIG_SMP,
+ * but same is not true for ARCH backend, hence the need for 2 variants
+ */
+#ifndef CONFIG_ARC_HAS_LLSC
+
+#include <linux/irqflags.h>
+#ifdef CONFIG_SMP
+
+#include <asm/spinlock.h>
+
+extern arch_spinlock_t smp_atomic_ops_lock;
+
+#define atomic_ops_lock(flags) do { \
+ local_irq_save(flags); \
+ arch_spin_lock(&smp_atomic_ops_lock); \
+} while (0)
+
+#define atomic_ops_unlock(flags) do { \
+ arch_spin_unlock(&smp_atomic_ops_lock); \
+ local_irq_restore(flags); \
+} while (0)
+
+#else /* !CONFIG_SMP */
+
+#define atomic_ops_lock(flags) local_irq_save(flags)
+#define atomic_ops_unlock(flags) local_irq_restore(flags)
+
+#endif /* !CONFIG_SMP */
+
+#endif /* !CONFIG_ARC_HAS_LLSC */
+
+#endif
diff --git a/arch/arc/include/asm/spinlock.h b/arch/arc/include/asm/spinlock.h
new file mode 100644
index 000000000..192871608
--- /dev/null
+++ b/arch/arc/include/asm/spinlock.h
@@ -0,0 +1,382 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef __ASM_SPINLOCK_H
+#define __ASM_SPINLOCK_H
+
+#include <asm/spinlock_types.h>
+#include <asm/processor.h>
+#include <asm/barrier.h>
+
+#define arch_spin_is_locked(x) ((x)->slock != __ARCH_SPIN_LOCK_UNLOCKED__)
+
+#ifdef CONFIG_ARC_HAS_LLSC
+
+static inline void arch_spin_lock(arch_spinlock_t *lock)
+{
+ unsigned int val;
+
+ __asm__ __volatile__(
+ "1: llock %[val], [%[slock]] \n"
+ " breq %[val], %[LOCKED], 1b \n" /* spin while LOCKED */
+ " scond %[LOCKED], [%[slock]] \n" /* acquire */
+ " bnz 1b \n"
+ " \n"
+ : [val] "=&r" (val)
+ : [slock] "r" (&(lock->slock)),
+ [LOCKED] "r" (__ARCH_SPIN_LOCK_LOCKED__)
+ : "memory", "cc");
+
+ /*
+ * ACQUIRE barrier to ensure load/store after taking the lock
+ * don't "bleed-up" out of the critical section (leak-in is allowed)
+ * http://www.spinics.net/lists/kernel/msg2010409.html
+ *
+ * ARCv2 only has load-load, store-store and all-all barrier
+ * thus need the full all-all barrier
+ */
+ smp_mb();
+}
+
+/* 1 - lock taken successfully */
+static inline int arch_spin_trylock(arch_spinlock_t *lock)
+{
+ unsigned int val, got_it = 0;
+
+ __asm__ __volatile__(
+ "1: llock %[val], [%[slock]] \n"
+ " breq %[val], %[LOCKED], 4f \n" /* already LOCKED, just bail */
+ " scond %[LOCKED], [%[slock]] \n" /* acquire */
+ " bnz 1b \n"
+ " mov %[got_it], 1 \n"
+ "4: \n"
+ " \n"
+ : [val] "=&r" (val),
+ [got_it] "+&r" (got_it)
+ : [slock] "r" (&(lock->slock)),
+ [LOCKED] "r" (__ARCH_SPIN_LOCK_LOCKED__)
+ : "memory", "cc");
+
+ smp_mb();
+
+ return got_it;
+}
+
+static inline void arch_spin_unlock(arch_spinlock_t *lock)
+{
+ smp_mb();
+
+ WRITE_ONCE(lock->slock, __ARCH_SPIN_LOCK_UNLOCKED__);
+}
+
+/*
+ * Read-write spinlocks, allowing multiple readers but only one writer.
+ * Unfair locking as Writers could be starved indefinitely by Reader(s)
+ */
+
+static inline void arch_read_lock(arch_rwlock_t *rw)
+{
+ unsigned int val;
+
+ /*
+ * zero means writer holds the lock exclusively, deny Reader.
+ * Otherwise grant lock to first/subseq reader
+ *
+ * if (rw->counter > 0) {
+ * rw->counter--;
+ * ret = 1;
+ * }
+ */
+
+ __asm__ __volatile__(
+ "1: llock %[val], [%[rwlock]] \n"
+ " brls %[val], %[WR_LOCKED], 1b\n" /* <= 0: spin while write locked */
+ " sub %[val], %[val], 1 \n" /* reader lock */
+ " scond %[val], [%[rwlock]] \n"
+ " bnz 1b \n"
+ " \n"
+ : [val] "=&r" (val)
+ : [rwlock] "r" (&(rw->counter)),
+ [WR_LOCKED] "ir" (0)
+ : "memory", "cc");
+
+ smp_mb();
+}
+
+/* 1 - lock taken successfully */
+static inline int arch_read_trylock(arch_rwlock_t *rw)
+{
+ unsigned int val, got_it = 0;
+
+ __asm__ __volatile__(
+ "1: llock %[val], [%[rwlock]] \n"
+ " brls %[val], %[WR_LOCKED], 4f\n" /* <= 0: already write locked, bail */
+ " sub %[val], %[val], 1 \n" /* counter-- */
+ " scond %[val], [%[rwlock]] \n"
+ " bnz 1b \n" /* retry if collided with someone */
+ " mov %[got_it], 1 \n"
+ " \n"
+ "4: ; --- done --- \n"
+
+ : [val] "=&r" (val),
+ [got_it] "+&r" (got_it)
+ : [rwlock] "r" (&(rw->counter)),
+ [WR_LOCKED] "ir" (0)
+ : "memory", "cc");
+
+ smp_mb();
+
+ return got_it;
+}
+
+static inline void arch_write_lock(arch_rwlock_t *rw)
+{
+ unsigned int val;
+
+ /*
+ * If reader(s) hold lock (lock < __ARCH_RW_LOCK_UNLOCKED__),
+ * deny writer. Otherwise if unlocked grant to writer
+ * Hence the claim that Linux rwlocks are unfair to writers.
+ * (can be starved for an indefinite time by readers).
+ *
+ * if (rw->counter == __ARCH_RW_LOCK_UNLOCKED__) {
+ * rw->counter = 0;
+ * ret = 1;
+ * }
+ */
+
+ __asm__ __volatile__(
+ "1: llock %[val], [%[rwlock]] \n"
+ " brne %[val], %[UNLOCKED], 1b \n" /* while !UNLOCKED spin */
+ " mov %[val], %[WR_LOCKED] \n"
+ " scond %[val], [%[rwlock]] \n"
+ " bnz 1b \n"
+ " \n"
+ : [val] "=&r" (val)
+ : [rwlock] "r" (&(rw->counter)),
+ [UNLOCKED] "ir" (__ARCH_RW_LOCK_UNLOCKED__),
+ [WR_LOCKED] "ir" (0)
+ : "memory", "cc");
+
+ smp_mb();
+}
+
+/* 1 - lock taken successfully */
+static inline int arch_write_trylock(arch_rwlock_t *rw)
+{
+ unsigned int val, got_it = 0;
+
+ __asm__ __volatile__(
+ "1: llock %[val], [%[rwlock]] \n"
+ " brne %[val], %[UNLOCKED], 4f \n" /* !UNLOCKED, bail */
+ " mov %[val], %[WR_LOCKED] \n"
+ " scond %[val], [%[rwlock]] \n"
+ " bnz 1b \n" /* retry if collided with someone */
+ " mov %[got_it], 1 \n"
+ " \n"
+ "4: ; --- done --- \n"
+
+ : [val] "=&r" (val),
+ [got_it] "+&r" (got_it)
+ : [rwlock] "r" (&(rw->counter)),
+ [UNLOCKED] "ir" (__ARCH_RW_LOCK_UNLOCKED__),
+ [WR_LOCKED] "ir" (0)
+ : "memory", "cc");
+
+ smp_mb();
+
+ return got_it;
+}
+
+static inline void arch_read_unlock(arch_rwlock_t *rw)
+{
+ unsigned int val;
+
+ smp_mb();
+
+ /*
+ * rw->counter++;
+ */
+ __asm__ __volatile__(
+ "1: llock %[val], [%[rwlock]] \n"
+ " add %[val], %[val], 1 \n"
+ " scond %[val], [%[rwlock]] \n"
+ " bnz 1b \n"
+ " \n"
+ : [val] "=&r" (val)
+ : [rwlock] "r" (&(rw->counter))
+ : "memory", "cc");
+}
+
+static inline void arch_write_unlock(arch_rwlock_t *rw)
+{
+ smp_mb();
+
+ WRITE_ONCE(rw->counter, __ARCH_RW_LOCK_UNLOCKED__);
+}
+
+#else /* !CONFIG_ARC_HAS_LLSC */
+
+static inline void arch_spin_lock(arch_spinlock_t *lock)
+{
+ unsigned int val = __ARCH_SPIN_LOCK_LOCKED__;
+
+ /*
+ * Per lkmm, smp_mb() is only required after _lock (and before_unlock)
+ * for ACQ and REL semantics respectively. However EX based spinlocks
+ * need the extra smp_mb to workaround a hardware quirk.
+ */
+ smp_mb();
+
+ __asm__ __volatile__(
+ "1: ex %0, [%1] \n"
+ " breq %0, %2, 1b \n"
+ : "+&r" (val)
+ : "r"(&(lock->slock)), "ir"(__ARCH_SPIN_LOCK_LOCKED__)
+ : "memory");
+
+ smp_mb();
+}
+
+/* 1 - lock taken successfully */
+static inline int arch_spin_trylock(arch_spinlock_t *lock)
+{
+ unsigned int val = __ARCH_SPIN_LOCK_LOCKED__;
+
+ smp_mb();
+
+ __asm__ __volatile__(
+ "1: ex %0, [%1] \n"
+ : "+r" (val)
+ : "r"(&(lock->slock))
+ : "memory");
+
+ smp_mb();
+
+ return (val == __ARCH_SPIN_LOCK_UNLOCKED__);
+}
+
+static inline void arch_spin_unlock(arch_spinlock_t *lock)
+{
+ unsigned int val = __ARCH_SPIN_LOCK_UNLOCKED__;
+
+ /*
+ * RELEASE barrier: given the instructions avail on ARCv2, full barrier
+ * is the only option
+ */
+ smp_mb();
+
+ /*
+ * EX is not really required here, a simple STore of 0 suffices.
+ * However this causes tasklist livelocks in SystemC based SMP virtual
+ * platforms where the systemc core scheduler uses EX as a cue for
+ * moving to next core. Do a git log of this file for details
+ */
+ __asm__ __volatile__(
+ " ex %0, [%1] \n"
+ : "+r" (val)
+ : "r"(&(lock->slock))
+ : "memory");
+
+ /*
+ * see pairing version/comment in arch_spin_lock above
+ */
+ smp_mb();
+}
+
+/*
+ * Read-write spinlocks, allowing multiple readers but only one writer.
+ * Unfair locking as Writers could be starved indefinitely by Reader(s)
+ *
+ * The spinlock itself is contained in @counter and access to it is
+ * serialized with @lock_mutex.
+ */
+
+/* 1 - lock taken successfully */
+static inline int arch_read_trylock(arch_rwlock_t *rw)
+{
+ int ret = 0;
+ unsigned long flags;
+
+ local_irq_save(flags);
+ arch_spin_lock(&(rw->lock_mutex));
+
+ /*
+ * zero means writer holds the lock exclusively, deny Reader.
+ * Otherwise grant lock to first/subseq reader
+ */
+ if (rw->counter > 0) {
+ rw->counter--;
+ ret = 1;
+ }
+
+ arch_spin_unlock(&(rw->lock_mutex));
+ local_irq_restore(flags);
+
+ return ret;
+}
+
+/* 1 - lock taken successfully */
+static inline int arch_write_trylock(arch_rwlock_t *rw)
+{
+ int ret = 0;
+ unsigned long flags;
+
+ local_irq_save(flags);
+ arch_spin_lock(&(rw->lock_mutex));
+
+ /*
+ * If reader(s) hold lock (lock < __ARCH_RW_LOCK_UNLOCKED__),
+ * deny writer. Otherwise if unlocked grant to writer
+ * Hence the claim that Linux rwlocks are unfair to writers.
+ * (can be starved for an indefinite time by readers).
+ */
+ if (rw->counter == __ARCH_RW_LOCK_UNLOCKED__) {
+ rw->counter = 0;
+ ret = 1;
+ }
+ arch_spin_unlock(&(rw->lock_mutex));
+ local_irq_restore(flags);
+
+ return ret;
+}
+
+static inline void arch_read_lock(arch_rwlock_t *rw)
+{
+ while (!arch_read_trylock(rw))
+ cpu_relax();
+}
+
+static inline void arch_write_lock(arch_rwlock_t *rw)
+{
+ while (!arch_write_trylock(rw))
+ cpu_relax();
+}
+
+static inline void arch_read_unlock(arch_rwlock_t *rw)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+ arch_spin_lock(&(rw->lock_mutex));
+ rw->counter++;
+ arch_spin_unlock(&(rw->lock_mutex));
+ local_irq_restore(flags);
+}
+
+static inline void arch_write_unlock(arch_rwlock_t *rw)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+ arch_spin_lock(&(rw->lock_mutex));
+ rw->counter = __ARCH_RW_LOCK_UNLOCKED__;
+ arch_spin_unlock(&(rw->lock_mutex));
+ local_irq_restore(flags);
+}
+
+#endif
+
+#endif /* __ASM_SPINLOCK_H */
diff --git a/arch/arc/include/asm/spinlock_types.h b/arch/arc/include/asm/spinlock_types.h
new file mode 100644
index 000000000..7cd037399
--- /dev/null
+++ b/arch/arc/include/asm/spinlock_types.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef __ASM_SPINLOCK_TYPES_H
+#define __ASM_SPINLOCK_TYPES_H
+
+typedef struct {
+ volatile unsigned int slock;
+} arch_spinlock_t;
+
+#define __ARCH_SPIN_LOCK_UNLOCKED__ 0
+#define __ARCH_SPIN_LOCK_LOCKED__ 1
+
+#define __ARCH_SPIN_LOCK_UNLOCKED { __ARCH_SPIN_LOCK_UNLOCKED__ }
+#define __ARCH_SPIN_LOCK_LOCKED { __ARCH_SPIN_LOCK_LOCKED__ }
+
+/*
+ * Unlocked : 0x0100_0000
+ * Read lock(s) : 0x00FF_FFFF to 0x01 (Multiple Readers decrement it)
+ * Write lock : 0x0, but only if prior value is "unlocked" 0x0100_0000
+ */
+typedef struct {
+ volatile unsigned int counter;
+#ifndef CONFIG_ARC_HAS_LLSC
+ arch_spinlock_t lock_mutex;
+#endif
+} arch_rwlock_t;
+
+#define __ARCH_RW_LOCK_UNLOCKED__ 0x01000000
+#define __ARCH_RW_LOCK_UNLOCKED { .counter = __ARCH_RW_LOCK_UNLOCKED__ }
+
+#endif
diff --git a/arch/arc/include/asm/stacktrace.h b/arch/arc/include/asm/stacktrace.h
new file mode 100644
index 000000000..4c50fb003
--- /dev/null
+++ b/arch/arc/include/asm/stacktrace.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
+ * Copyright (C) 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef __ASM_STACKTRACE_H
+#define __ASM_STACKTRACE_H
+
+#include <linux/sched.h>
+
+/**
+ * arc_unwind_core - Unwind the kernel mode stack for an execution context
+ * @tsk: NULL for current task, specific task otherwise
+ * @regs: pt_regs used to seed the unwinder {SP, FP, BLINK, PC}
+ * If NULL, use pt_regs of @tsk (if !NULL) otherwise
+ * use the current values of {SP, FP, BLINK, PC}
+ * @consumer_fn: Callback invoked for each frame unwound
+ * Returns 0 to continue unwinding, -1 to stop
+ * @arg: Arg to callback
+ *
+ * Returns the address of first function in stack
+ *
+ * Semantics:
+ * - synchronous unwinding (e.g. dump_stack): @tsk NULL, @regs NULL
+ * - Asynchronous unwinding of sleeping task: @tsk !NULL, @regs NULL
+ * - Asynchronous unwinding of intr/excp etc: @tsk !NULL, @regs !NULL
+ */
+notrace noinline unsigned int arc_unwind_core(
+ struct task_struct *tsk, struct pt_regs *regs,
+ int (*consumer_fn) (unsigned int, void *),
+ void *arg);
+
+#endif /* __ASM_STACKTRACE_H */
diff --git a/arch/arc/include/asm/string.h b/arch/arc/include/asm/string.h
new file mode 100644
index 000000000..3182ea9dc
--- /dev/null
+++ b/arch/arc/include/asm/string.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * vineetg: May 2011
+ * -We had half-optimised memset/memcpy, got better versions of those
+ * -Added memcmp, strchr, strcpy, strcmp, strlen
+ *
+ * Amit Bhor: Codito Technologies 2004
+ */
+
+#ifndef _ASM_ARC_STRING_H
+#define _ASM_ARC_STRING_H
+
+#include <linux/types.h>
+
+#define __HAVE_ARCH_MEMSET
+#define __HAVE_ARCH_MEMCPY
+#define __HAVE_ARCH_MEMCMP
+#define __HAVE_ARCH_STRCHR
+#define __HAVE_ARCH_STRCPY
+#define __HAVE_ARCH_STRCMP
+#define __HAVE_ARCH_STRLEN
+
+extern void *memset(void *ptr, int, __kernel_size_t);
+extern void *memcpy(void *, const void *, __kernel_size_t);
+extern void memzero(void *ptr, __kernel_size_t n);
+extern int memcmp(const void *, const void *, __kernel_size_t);
+extern char *strchr(const char *s, int c);
+extern char *strcpy(char *dest, const char *src);
+extern int strcmp(const char *cs, const char *ct);
+extern __kernel_size_t strlen(const char *);
+
+#endif /* _ASM_ARC_STRING_H */
diff --git a/arch/arc/include/asm/switch_to.h b/arch/arc/include/asm/switch_to.h
new file mode 100644
index 000000000..1f85de828
--- /dev/null
+++ b/arch/arc/include/asm/switch_to.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef _ASM_ARC_SWITCH_TO_H
+#define _ASM_ARC_SWITCH_TO_H
+
+#ifndef __ASSEMBLY__
+
+#include <linux/sched.h>
+#include <asm/dsp-impl.h>
+#include <asm/fpu.h>
+
+struct task_struct *__switch_to(struct task_struct *p, struct task_struct *n);
+
+#define switch_to(prev, next, last) \
+do { \
+ dsp_save_restore(prev, next); \
+ fpu_save_restore(prev, next); \
+ last = __switch_to(prev, next);\
+ mb(); \
+} while (0)
+
+#endif
+
+#endif
diff --git a/arch/arc/include/asm/syscall.h b/arch/arc/include/asm/syscall.h
new file mode 100644
index 000000000..9709256e3
--- /dev/null
+++ b/arch/arc/include/asm/syscall.h
@@ -0,0 +1,80 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef _ASM_ARC_SYSCALL_H
+#define _ASM_ARC_SYSCALL_H 1
+
+#include <uapi/linux/audit.h>
+#include <linux/err.h>
+#include <linux/sched.h>
+#include <asm/unistd.h>
+#include <asm/ptrace.h> /* in_syscall() */
+
+extern void *sys_call_table[];
+
+static inline long
+syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
+{
+ if (user_mode(regs) && in_syscall(regs))
+ return regs->r8;
+ else
+ return -1;
+}
+
+static inline void
+syscall_rollback(struct task_struct *task, struct pt_regs *regs)
+{
+ regs->r0 = regs->orig_r0;
+}
+
+static inline long
+syscall_get_error(struct task_struct *task, struct pt_regs *regs)
+{
+ /* 0 if syscall succeeded, otherwise -Errorcode */
+ return IS_ERR_VALUE(regs->r0) ? regs->r0 : 0;
+}
+
+static inline long
+syscall_get_return_value(struct task_struct *task, struct pt_regs *regs)
+{
+ return regs->r0;
+}
+
+static inline void
+syscall_set_return_value(struct task_struct *task, struct pt_regs *regs,
+ int error, long val)
+{
+ regs->r0 = (long) error ?: val;
+}
+
+/*
+ * @i: argument index [0,5]
+ * @n: number of arguments; n+i must be [1,6].
+ */
+static inline void
+syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
+ unsigned long *args)
+{
+ unsigned long *inside_ptregs = &(regs->r0);
+ unsigned int n = 6;
+ unsigned int i = 0;
+
+ while (n--) {
+ args[i++] = (*inside_ptregs);
+ inside_ptregs--;
+ }
+}
+
+static inline int
+syscall_get_arch(struct task_struct *task)
+{
+ return IS_ENABLED(CONFIG_ISA_ARCOMPACT)
+ ? (IS_ENABLED(CONFIG_CPU_BIG_ENDIAN)
+ ? AUDIT_ARCH_ARCOMPACTBE : AUDIT_ARCH_ARCOMPACT)
+ : (IS_ENABLED(CONFIG_CPU_BIG_ENDIAN)
+ ? AUDIT_ARCH_ARCV2BE : AUDIT_ARCH_ARCV2);
+}
+
+#endif
diff --git a/arch/arc/include/asm/syscalls.h b/arch/arc/include/asm/syscalls.h
new file mode 100644
index 000000000..c3f4714a4
--- /dev/null
+++ b/arch/arc/include/asm/syscalls.h
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef _ASM_ARC_SYSCALLS_H
+#define _ASM_ARC_SYSCALLS_H 1
+
+#include <linux/compiler.h>
+#include <linux/linkage.h>
+#include <linux/types.h>
+
+int sys_clone_wrapper(int, int, int, int, int);
+int sys_clone3_wrapper(void *, size_t);
+int sys_cacheflush(uint32_t, uint32_t uint32_t);
+int sys_arc_settls(void *);
+int sys_arc_gettls(void);
+int sys_arc_usr_cmpxchg(int *, int, int);
+
+#include <asm-generic/syscalls.h>
+
+#endif
diff --git a/arch/arc/include/asm/thread_info.h b/arch/arc/include/asm/thread_info.h
new file mode 100644
index 000000000..6ba7fe417
--- /dev/null
+++ b/arch/arc/include/asm/thread_info.h
@@ -0,0 +1,106 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * Vineetg: Oct 2009
+ * No need for ARC specific thread_info allocator (kmalloc/free). This is
+ * anyways one page allocation, thus slab alloc can be short-circuited and
+ * the generic version (get_free_page) would be loads better.
+ *
+ * Sameer Dhavale: Codito Technologies 2004
+ */
+
+#ifndef _ASM_THREAD_INFO_H
+#define _ASM_THREAD_INFO_H
+
+#include <asm/page.h>
+
+#ifdef CONFIG_16KSTACKS
+#define THREAD_SIZE_ORDER 1
+#else
+#define THREAD_SIZE_ORDER 0
+#endif
+
+#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
+#define THREAD_SHIFT (PAGE_SHIFT << THREAD_SIZE_ORDER)
+
+#ifndef __ASSEMBLY__
+
+#include <linux/thread_info.h>
+
+/*
+ * low level task data that entry.S needs immediate access to
+ * - this struct should fit entirely inside of one cache line
+ * - this struct shares the supervisor stack pages
+ * - if the contents of this structure are changed, the assembly constants
+ * must also be changed
+ */
+struct thread_info {
+ unsigned long flags; /* low level flags */
+ int preempt_count; /* 0 => preemptable, <0 => BUG */
+ struct task_struct *task; /* main task structure */
+ __u32 cpu; /* current CPU */
+ unsigned long thr_ptr; /* TLS ptr */
+};
+
+/*
+ * macros/functions for gaining access to the thread information structure
+ *
+ * preempt_count needs to be 1 initially, until the scheduler is functional.
+ */
+#define INIT_THREAD_INFO(tsk) \
+{ \
+ .task = &tsk, \
+ .flags = 0, \
+ .cpu = 0, \
+ .preempt_count = INIT_PREEMPT_COUNT, \
+}
+
+static inline __attribute_const__ struct thread_info *current_thread_info(void)
+{
+ register unsigned long sp asm("sp");
+ return (struct thread_info *)(sp & ~(THREAD_SIZE - 1));
+}
+
+#endif /* !__ASSEMBLY__ */
+
+/*
+ * thread information flags
+ * - these are process state flags that various assembly files may need to
+ * access
+ * - pending work-to-be-done flags are in LSW
+ * - other flags in MSW
+ */
+#define TIF_RESTORE_SIGMASK 0 /* restore sig mask in do_signal() */
+#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
+#define TIF_SIGPENDING 2 /* signal pending */
+#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
+#define TIF_SYSCALL_AUDIT 4 /* syscall auditing active */
+#define TIF_NOTIFY_SIGNAL 5 /* signal notifications exist */
+#define TIF_SYSCALL_TRACE 15 /* syscall trace active */
+/* true if poll_idle() is polling TIF_NEED_RESCHED */
+#define TIF_MEMDIE 16
+#define TIF_SYSCALL_TRACEPOINT 17 /* syscall tracepoint instrumentation */
+
+#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
+#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
+#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
+#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
+#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
+#define _TIF_NOTIFY_SIGNAL (1<<TIF_NOTIFY_SIGNAL)
+#define _TIF_MEMDIE (1<<TIF_MEMDIE)
+#define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT)
+
+/* work to do on interrupt/exception return */
+#define _TIF_WORK_MASK (_TIF_NEED_RESCHED | _TIF_SIGPENDING | \
+ _TIF_NOTIFY_RESUME | _TIF_NOTIFY_SIGNAL)
+
+#define _TIF_SYSCALL_WORK (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_TRACEPOINT)
+
+/*
+ * _TIF_ALLWORK_MASK includes SYSCALL_TRACE, but we don't need it.
+ * SYSCALL_TRACE is anyway separately/unconditionally tested right after a
+ * syscall, so all that remains to be tested is _TIF_WORK_MASK
+ */
+
+#endif /* _ASM_THREAD_INFO_H */
diff --git a/arch/arc/include/asm/timex.h b/arch/arc/include/asm/timex.h
new file mode 100644
index 000000000..48b3482bc
--- /dev/null
+++ b/arch/arc/include/asm/timex.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef _ASM_ARC_TIMEX_H
+#define _ASM_ARC_TIMEX_H
+
+#define CLOCK_TICK_RATE 80000000 /* slated to be removed */
+
+#include <asm-generic/timex.h>
+
+/* XXX: get_cycles() to be implemented with RTSC insn */
+
+#endif /* _ASM_ARC_TIMEX_H */
diff --git a/arch/arc/include/asm/tlb.h b/arch/arc/include/asm/tlb.h
new file mode 100644
index 000000000..975b35d37
--- /dev/null
+++ b/arch/arc/include/asm/tlb.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef _ASM_ARC_TLB_H
+#define _ASM_ARC_TLB_H
+
+#include <linux/pagemap.h>
+#include <asm-generic/tlb.h>
+
+#endif /* _ASM_ARC_TLB_H */
diff --git a/arch/arc/include/asm/tlbflush.h b/arch/arc/include/asm/tlbflush.h
new file mode 100644
index 000000000..992a2837a
--- /dev/null
+++ b/arch/arc/include/asm/tlbflush.h
@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef __ASM_ARC_TLBFLUSH__
+#define __ASM_ARC_TLBFLUSH__
+
+#include <linux/mm.h>
+
+void local_flush_tlb_all(void);
+void local_flush_tlb_mm(struct mm_struct *mm);
+void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long page);
+void local_flush_tlb_kernel_range(unsigned long start, unsigned long end);
+void local_flush_tlb_range(struct vm_area_struct *vma,
+ unsigned long start, unsigned long end);
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+void local_flush_pmd_tlb_range(struct vm_area_struct *vma, unsigned long start,
+ unsigned long end);
+#endif
+
+#ifndef CONFIG_SMP
+#define flush_tlb_range(vma, s, e) local_flush_tlb_range(vma, s, e)
+#define flush_tlb_page(vma, page) local_flush_tlb_page(vma, page)
+#define flush_tlb_kernel_range(s, e) local_flush_tlb_kernel_range(s, e)
+#define flush_tlb_all() local_flush_tlb_all()
+#define flush_tlb_mm(mm) local_flush_tlb_mm(mm)
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+#define flush_pmd_tlb_range(vma, s, e) local_flush_pmd_tlb_range(vma, s, e)
+#endif
+#else
+extern void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
+ unsigned long end);
+extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long page);
+extern void flush_tlb_kernel_range(unsigned long start, unsigned long end);
+extern void flush_tlb_all(void);
+extern void flush_tlb_mm(struct mm_struct *mm);
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+extern void flush_pmd_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end);
+#endif
+#endif /* CONFIG_SMP */
+#endif
diff --git a/arch/arc/include/asm/uaccess.h b/arch/arc/include/asm/uaccess.h
new file mode 100644
index 000000000..99712471c
--- /dev/null
+++ b/arch/arc/include/asm/uaccess.h
@@ -0,0 +1,643 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * vineetg: June 2010
+ * -__clear_user( ) called multiple times during elf load was byte loop
+ * converted to do as much word clear as possible.
+ *
+ * vineetg: Dec 2009
+ * -Hand crafted constant propagation for "constant" copy sizes
+ * -stock kernel shrunk by 33K at -O3
+ *
+ * vineetg: Sept 2009
+ * -Added option to (UN)inline copy_(to|from)_user to reduce code sz
+ * -kernel shrunk by 200K even at -O3 (gcc 4.2.1)
+ * -Enabled when doing -Os
+ *
+ * Amit Bhor, Sameer Dhavale: Codito Technologies 2004
+ */
+
+#ifndef _ASM_ARC_UACCESS_H
+#define _ASM_ARC_UACCESS_H
+
+#include <linux/string.h> /* for generic string functions */
+
+/*********** Single byte/hword/word copies ******************/
+
+#define __get_user_fn(sz, u, k) \
+({ \
+ long __ret = 0; /* success by default */ \
+ switch (sz) { \
+ case 1: __arc_get_user_one(*(k), u, "ldb", __ret); break; \
+ case 2: __arc_get_user_one(*(k), u, "ldw", __ret); break; \
+ case 4: __arc_get_user_one(*(k), u, "ld", __ret); break; \
+ case 8: __arc_get_user_one_64(*(k), u, __ret); break; \
+ } \
+ __ret; \
+})
+
+/*
+ * Returns 0 on success, -EFAULT if not.
+ * @ret already contains 0 - given that errors will be less likely
+ * (hence +r asm constraint below).
+ * In case of error, fixup code will make it -EFAULT
+ */
+#define __arc_get_user_one(dst, src, op, ret) \
+ __asm__ __volatile__( \
+ "1: "op" %1,[%2]\n" \
+ "2: ;nop\n" \
+ " .section .fixup, \"ax\"\n" \
+ " .align 4\n" \
+ "3: # return -EFAULT\n" \
+ " mov %0, %3\n" \
+ " # zero out dst ptr\n" \
+ " mov %1, 0\n" \
+ " j 2b\n" \
+ " .previous\n" \
+ " .section __ex_table, \"a\"\n" \
+ " .align 4\n" \
+ " .word 1b,3b\n" \
+ " .previous\n" \
+ \
+ : "+r" (ret), "=r" (dst) \
+ : "r" (src), "ir" (-EFAULT))
+
+#define __arc_get_user_one_64(dst, src, ret) \
+ __asm__ __volatile__( \
+ "1: ld %1,[%2]\n" \
+ "4: ld %R1,[%2, 4]\n" \
+ "2: ;nop\n" \
+ " .section .fixup, \"ax\"\n" \
+ " .align 4\n" \
+ "3: # return -EFAULT\n" \
+ " mov %0, %3\n" \
+ " # zero out dst ptr\n" \
+ " mov %1, 0\n" \
+ " mov %R1, 0\n" \
+ " j 2b\n" \
+ " .previous\n" \
+ " .section __ex_table, \"a\"\n" \
+ " .align 4\n" \
+ " .word 1b,3b\n" \
+ " .word 4b,3b\n" \
+ " .previous\n" \
+ \
+ : "+r" (ret), "=r" (dst) \
+ : "r" (src), "ir" (-EFAULT))
+
+#define __put_user_fn(sz, u, k) \
+({ \
+ long __ret = 0; /* success by default */ \
+ switch (sz) { \
+ case 1: __arc_put_user_one(*(k), u, "stb", __ret); break; \
+ case 2: __arc_put_user_one(*(k), u, "stw", __ret); break; \
+ case 4: __arc_put_user_one(*(k), u, "st", __ret); break; \
+ case 8: __arc_put_user_one_64(*(k), u, __ret); break; \
+ } \
+ __ret; \
+})
+
+#define __arc_put_user_one(src, dst, op, ret) \
+ __asm__ __volatile__( \
+ "1: "op" %1,[%2]\n" \
+ "2: ;nop\n" \
+ " .section .fixup, \"ax\"\n" \
+ " .align 4\n" \
+ "3: mov %0, %3\n" \
+ " j 2b\n" \
+ " .previous\n" \
+ " .section __ex_table, \"a\"\n" \
+ " .align 4\n" \
+ " .word 1b,3b\n" \
+ " .previous\n" \
+ \
+ : "+r" (ret) \
+ : "r" (src), "r" (dst), "ir" (-EFAULT))
+
+#define __arc_put_user_one_64(src, dst, ret) \
+ __asm__ __volatile__( \
+ "1: st %1,[%2]\n" \
+ "4: st %R1,[%2, 4]\n" \
+ "2: ;nop\n" \
+ " .section .fixup, \"ax\"\n" \
+ " .align 4\n" \
+ "3: mov %0, %3\n" \
+ " j 2b\n" \
+ " .previous\n" \
+ " .section __ex_table, \"a\"\n" \
+ " .align 4\n" \
+ " .word 1b,3b\n" \
+ " .word 4b,3b\n" \
+ " .previous\n" \
+ \
+ : "+r" (ret) \
+ : "r" (src), "r" (dst), "ir" (-EFAULT))
+
+
+static inline unsigned long
+raw_copy_from_user(void *to, const void __user *from, unsigned long n)
+{
+ long res = 0;
+ char val;
+ unsigned long tmp1, tmp2, tmp3, tmp4;
+ unsigned long orig_n = n;
+
+ if (n == 0)
+ return 0;
+
+ /* unaligned */
+ if (((unsigned long)to & 0x3) || ((unsigned long)from & 0x3)) {
+
+ unsigned char tmp;
+
+ __asm__ __volatile__ (
+ " mov.f lp_count, %0 \n"
+ " lpnz 2f \n"
+ "1: ldb.ab %1, [%3, 1] \n"
+ " stb.ab %1, [%2, 1] \n"
+ " sub %0,%0,1 \n"
+ "2: ;nop \n"
+ " .section .fixup, \"ax\" \n"
+ " .align 4 \n"
+ "3: j 2b \n"
+ " .previous \n"
+ " .section __ex_table, \"a\" \n"
+ " .align 4 \n"
+ " .word 1b, 3b \n"
+ " .previous \n"
+
+ : "+r" (n),
+ /*
+ * Note as an '&' earlyclobber operand to make sure the
+ * temporary register inside the loop is not the same as
+ * FROM or TO.
+ */
+ "=&r" (tmp), "+r" (to), "+r" (from)
+ :
+ : "lp_count", "memory");
+
+ return n;
+ }
+
+ /*
+ * Hand-crafted constant propagation to reduce code sz of the
+ * laddered copy 16x,8,4,2,1
+ */
+ if (__builtin_constant_p(orig_n)) {
+ res = orig_n;
+
+ if (orig_n / 16) {
+ orig_n = orig_n % 16;
+
+ __asm__ __volatile__(
+ " lsr lp_count, %7,4 \n"
+ " lp 3f \n"
+ "1: ld.ab %3, [%2, 4] \n"
+ "11: ld.ab %4, [%2, 4] \n"
+ "12: ld.ab %5, [%2, 4] \n"
+ "13: ld.ab %6, [%2, 4] \n"
+ " st.ab %3, [%1, 4] \n"
+ " st.ab %4, [%1, 4] \n"
+ " st.ab %5, [%1, 4] \n"
+ " st.ab %6, [%1, 4] \n"
+ " sub %0,%0,16 \n"
+ "3: ;nop \n"
+ " .section .fixup, \"ax\" \n"
+ " .align 4 \n"
+ "4: j 3b \n"
+ " .previous \n"
+ " .section __ex_table, \"a\" \n"
+ " .align 4 \n"
+ " .word 1b, 4b \n"
+ " .word 11b,4b \n"
+ " .word 12b,4b \n"
+ " .word 13b,4b \n"
+ " .previous \n"
+ : "+r" (res), "+r"(to), "+r"(from),
+ "=r"(tmp1), "=r"(tmp2), "=r"(tmp3), "=r"(tmp4)
+ : "ir"(n)
+ : "lp_count", "memory");
+ }
+ if (orig_n / 8) {
+ orig_n = orig_n % 8;
+
+ __asm__ __volatile__(
+ "14: ld.ab %3, [%2,4] \n"
+ "15: ld.ab %4, [%2,4] \n"
+ " st.ab %3, [%1,4] \n"
+ " st.ab %4, [%1,4] \n"
+ " sub %0,%0,8 \n"
+ "31: ;nop \n"
+ " .section .fixup, \"ax\" \n"
+ " .align 4 \n"
+ "4: j 31b \n"
+ " .previous \n"
+ " .section __ex_table, \"a\" \n"
+ " .align 4 \n"
+ " .word 14b,4b \n"
+ " .word 15b,4b \n"
+ " .previous \n"
+ : "+r" (res), "+r"(to), "+r"(from),
+ "=r"(tmp1), "=r"(tmp2)
+ :
+ : "memory");
+ }
+ if (orig_n / 4) {
+ orig_n = orig_n % 4;
+
+ __asm__ __volatile__(
+ "16: ld.ab %3, [%2,4] \n"
+ " st.ab %3, [%1,4] \n"
+ " sub %0,%0,4 \n"
+ "32: ;nop \n"
+ " .section .fixup, \"ax\" \n"
+ " .align 4 \n"
+ "4: j 32b \n"
+ " .previous \n"
+ " .section __ex_table, \"a\" \n"
+ " .align 4 \n"
+ " .word 16b,4b \n"
+ " .previous \n"
+ : "+r" (res), "+r"(to), "+r"(from), "=r"(tmp1)
+ :
+ : "memory");
+ }
+ if (orig_n / 2) {
+ orig_n = orig_n % 2;
+
+ __asm__ __volatile__(
+ "17: ldw.ab %3, [%2,2] \n"
+ " stw.ab %3, [%1,2] \n"
+ " sub %0,%0,2 \n"
+ "33: ;nop \n"
+ " .section .fixup, \"ax\" \n"
+ " .align 4 \n"
+ "4: j 33b \n"
+ " .previous \n"
+ " .section __ex_table, \"a\" \n"
+ " .align 4 \n"
+ " .word 17b,4b \n"
+ " .previous \n"
+ : "+r" (res), "+r"(to), "+r"(from), "=r"(tmp1)
+ :
+ : "memory");
+ }
+ if (orig_n & 1) {
+ __asm__ __volatile__(
+ "18: ldb.ab %3, [%2,2] \n"
+ " stb.ab %3, [%1,2] \n"
+ " sub %0,%0,1 \n"
+ "34: ; nop \n"
+ " .section .fixup, \"ax\" \n"
+ " .align 4 \n"
+ "4: j 34b \n"
+ " .previous \n"
+ " .section __ex_table, \"a\" \n"
+ " .align 4 \n"
+ " .word 18b,4b \n"
+ " .previous \n"
+ : "+r" (res), "+r"(to), "+r"(from), "=r"(tmp1)
+ :
+ : "memory");
+ }
+ } else { /* n is NOT constant, so laddered copy of 16x,8,4,2,1 */
+
+ __asm__ __volatile__(
+ " mov %0,%3 \n"
+ " lsr.f lp_count, %3,4 \n" /* 16x bytes */
+ " lpnz 3f \n"
+ "1: ld.ab %5, [%2, 4] \n"
+ "11: ld.ab %6, [%2, 4] \n"
+ "12: ld.ab %7, [%2, 4] \n"
+ "13: ld.ab %8, [%2, 4] \n"
+ " st.ab %5, [%1, 4] \n"
+ " st.ab %6, [%1, 4] \n"
+ " st.ab %7, [%1, 4] \n"
+ " st.ab %8, [%1, 4] \n"
+ " sub %0,%0,16 \n"
+ "3: and.f %3,%3,0xf \n" /* stragglers */
+ " bz 34f \n"
+ " bbit0 %3,3,31f \n" /* 8 bytes left */
+ "14: ld.ab %5, [%2,4] \n"
+ "15: ld.ab %6, [%2,4] \n"
+ " st.ab %5, [%1,4] \n"
+ " st.ab %6, [%1,4] \n"
+ " sub.f %0,%0,8 \n"
+ "31: bbit0 %3,2,32f \n" /* 4 bytes left */
+ "16: ld.ab %5, [%2,4] \n"
+ " st.ab %5, [%1,4] \n"
+ " sub.f %0,%0,4 \n"
+ "32: bbit0 %3,1,33f \n" /* 2 bytes left */
+ "17: ldw.ab %5, [%2,2] \n"
+ " stw.ab %5, [%1,2] \n"
+ " sub.f %0,%0,2 \n"
+ "33: bbit0 %3,0,34f \n"
+ "18: ldb.ab %5, [%2,1] \n" /* 1 byte left */
+ " stb.ab %5, [%1,1] \n"
+ " sub.f %0,%0,1 \n"
+ "34: ;nop \n"
+ " .section .fixup, \"ax\" \n"
+ " .align 4 \n"
+ "4: j 34b \n"
+ " .previous \n"
+ " .section __ex_table, \"a\" \n"
+ " .align 4 \n"
+ " .word 1b, 4b \n"
+ " .word 11b,4b \n"
+ " .word 12b,4b \n"
+ " .word 13b,4b \n"
+ " .word 14b,4b \n"
+ " .word 15b,4b \n"
+ " .word 16b,4b \n"
+ " .word 17b,4b \n"
+ " .word 18b,4b \n"
+ " .previous \n"
+ : "=r" (res), "+r"(to), "+r"(from), "+r"(n), "=r"(val),
+ "=r"(tmp1), "=r"(tmp2), "=r"(tmp3), "=r"(tmp4)
+ :
+ : "lp_count", "memory");
+ }
+
+ return res;
+}
+
+static inline unsigned long
+raw_copy_to_user(void __user *to, const void *from, unsigned long n)
+{
+ long res = 0;
+ char val;
+ unsigned long tmp1, tmp2, tmp3, tmp4;
+ unsigned long orig_n = n;
+
+ if (n == 0)
+ return 0;
+
+ /* unaligned */
+ if (((unsigned long)to & 0x3) || ((unsigned long)from & 0x3)) {
+
+ unsigned char tmp;
+
+ __asm__ __volatile__(
+ " mov.f lp_count, %0 \n"
+ " lpnz 3f \n"
+ " ldb.ab %1, [%3, 1] \n"
+ "1: stb.ab %1, [%2, 1] \n"
+ " sub %0, %0, 1 \n"
+ "3: ;nop \n"
+ " .section .fixup, \"ax\" \n"
+ " .align 4 \n"
+ "4: j 3b \n"
+ " .previous \n"
+ " .section __ex_table, \"a\" \n"
+ " .align 4 \n"
+ " .word 1b, 4b \n"
+ " .previous \n"
+
+ : "+r" (n),
+ /* Note as an '&' earlyclobber operand to make sure the
+ * temporary register inside the loop is not the same as
+ * FROM or TO.
+ */
+ "=&r" (tmp), "+r" (to), "+r" (from)
+ :
+ : "lp_count", "memory");
+
+ return n;
+ }
+
+ if (__builtin_constant_p(orig_n)) {
+ res = orig_n;
+
+ if (orig_n / 16) {
+ orig_n = orig_n % 16;
+
+ __asm__ __volatile__(
+ " lsr lp_count, %7,4 \n"
+ " lp 3f \n"
+ " ld.ab %3, [%2, 4] \n"
+ " ld.ab %4, [%2, 4] \n"
+ " ld.ab %5, [%2, 4] \n"
+ " ld.ab %6, [%2, 4] \n"
+ "1: st.ab %3, [%1, 4] \n"
+ "11: st.ab %4, [%1, 4] \n"
+ "12: st.ab %5, [%1, 4] \n"
+ "13: st.ab %6, [%1, 4] \n"
+ " sub %0, %0, 16 \n"
+ "3:;nop \n"
+ " .section .fixup, \"ax\" \n"
+ " .align 4 \n"
+ "4: j 3b \n"
+ " .previous \n"
+ " .section __ex_table, \"a\" \n"
+ " .align 4 \n"
+ " .word 1b, 4b \n"
+ " .word 11b,4b \n"
+ " .word 12b,4b \n"
+ " .word 13b,4b \n"
+ " .previous \n"
+ : "+r" (res), "+r"(to), "+r"(from),
+ "=r"(tmp1), "=r"(tmp2), "=r"(tmp3), "=r"(tmp4)
+ : "ir"(n)
+ : "lp_count", "memory");
+ }
+ if (orig_n / 8) {
+ orig_n = orig_n % 8;
+
+ __asm__ __volatile__(
+ " ld.ab %3, [%2,4] \n"
+ " ld.ab %4, [%2,4] \n"
+ "14: st.ab %3, [%1,4] \n"
+ "15: st.ab %4, [%1,4] \n"
+ " sub %0, %0, 8 \n"
+ "31:;nop \n"
+ " .section .fixup, \"ax\" \n"
+ " .align 4 \n"
+ "4: j 31b \n"
+ " .previous \n"
+ " .section __ex_table, \"a\" \n"
+ " .align 4 \n"
+ " .word 14b,4b \n"
+ " .word 15b,4b \n"
+ " .previous \n"
+ : "+r" (res), "+r"(to), "+r"(from),
+ "=r"(tmp1), "=r"(tmp2)
+ :
+ : "memory");
+ }
+ if (orig_n / 4) {
+ orig_n = orig_n % 4;
+
+ __asm__ __volatile__(
+ " ld.ab %3, [%2,4] \n"
+ "16: st.ab %3, [%1,4] \n"
+ " sub %0, %0, 4 \n"
+ "32:;nop \n"
+ " .section .fixup, \"ax\" \n"
+ " .align 4 \n"
+ "4: j 32b \n"
+ " .previous \n"
+ " .section __ex_table, \"a\" \n"
+ " .align 4 \n"
+ " .word 16b,4b \n"
+ " .previous \n"
+ : "+r" (res), "+r"(to), "+r"(from), "=r"(tmp1)
+ :
+ : "memory");
+ }
+ if (orig_n / 2) {
+ orig_n = orig_n % 2;
+
+ __asm__ __volatile__(
+ " ldw.ab %3, [%2,2] \n"
+ "17: stw.ab %3, [%1,2] \n"
+ " sub %0, %0, 2 \n"
+ "33:;nop \n"
+ " .section .fixup, \"ax\" \n"
+ " .align 4 \n"
+ "4: j 33b \n"
+ " .previous \n"
+ " .section __ex_table, \"a\" \n"
+ " .align 4 \n"
+ " .word 17b,4b \n"
+ " .previous \n"
+ : "+r" (res), "+r"(to), "+r"(from), "=r"(tmp1)
+ :
+ : "memory");
+ }
+ if (orig_n & 1) {
+ __asm__ __volatile__(
+ " ldb.ab %3, [%2,1] \n"
+ "18: stb.ab %3, [%1,1] \n"
+ " sub %0, %0, 1 \n"
+ "34: ;nop \n"
+ " .section .fixup, \"ax\" \n"
+ " .align 4 \n"
+ "4: j 34b \n"
+ " .previous \n"
+ " .section __ex_table, \"a\" \n"
+ " .align 4 \n"
+ " .word 18b,4b \n"
+ " .previous \n"
+ : "+r" (res), "+r"(to), "+r"(from), "=r"(tmp1)
+ :
+ : "memory");
+ }
+ } else { /* n is NOT constant, so laddered copy of 16x,8,4,2,1 */
+
+ __asm__ __volatile__(
+ " mov %0,%3 \n"
+ " lsr.f lp_count, %3,4 \n" /* 16x bytes */
+ " lpnz 3f \n"
+ " ld.ab %5, [%2, 4] \n"
+ " ld.ab %6, [%2, 4] \n"
+ " ld.ab %7, [%2, 4] \n"
+ " ld.ab %8, [%2, 4] \n"
+ "1: st.ab %5, [%1, 4] \n"
+ "11: st.ab %6, [%1, 4] \n"
+ "12: st.ab %7, [%1, 4] \n"
+ "13: st.ab %8, [%1, 4] \n"
+ " sub %0, %0, 16 \n"
+ "3: and.f %3,%3,0xf \n" /* stragglers */
+ " bz 34f \n"
+ " bbit0 %3,3,31f \n" /* 8 bytes left */
+ " ld.ab %5, [%2,4] \n"
+ " ld.ab %6, [%2,4] \n"
+ "14: st.ab %5, [%1,4] \n"
+ "15: st.ab %6, [%1,4] \n"
+ " sub.f %0, %0, 8 \n"
+ "31: bbit0 %3,2,32f \n" /* 4 bytes left */
+ " ld.ab %5, [%2,4] \n"
+ "16: st.ab %5, [%1,4] \n"
+ " sub.f %0, %0, 4 \n"
+ "32: bbit0 %3,1,33f \n" /* 2 bytes left */
+ " ldw.ab %5, [%2,2] \n"
+ "17: stw.ab %5, [%1,2] \n"
+ " sub.f %0, %0, 2 \n"
+ "33: bbit0 %3,0,34f \n"
+ " ldb.ab %5, [%2,1] \n" /* 1 byte left */
+ "18: stb.ab %5, [%1,1] \n"
+ " sub.f %0, %0, 1 \n"
+ "34: ;nop \n"
+ " .section .fixup, \"ax\" \n"
+ " .align 4 \n"
+ "4: j 34b \n"
+ " .previous \n"
+ " .section __ex_table, \"a\" \n"
+ " .align 4 \n"
+ " .word 1b, 4b \n"
+ " .word 11b,4b \n"
+ " .word 12b,4b \n"
+ " .word 13b,4b \n"
+ " .word 14b,4b \n"
+ " .word 15b,4b \n"
+ " .word 16b,4b \n"
+ " .word 17b,4b \n"
+ " .word 18b,4b \n"
+ " .previous \n"
+ : "=r" (res), "+r"(to), "+r"(from), "+r"(n), "=r"(val),
+ "=r"(tmp1), "=r"(tmp2), "=r"(tmp3), "=r"(tmp4)
+ :
+ : "lp_count", "memory");
+ }
+
+ return res;
+}
+
+static inline unsigned long __arc_clear_user(void __user *to, unsigned long n)
+{
+ long res = n;
+ unsigned char *d_char = to;
+
+ __asm__ __volatile__(
+ " bbit0 %0, 0, 1f \n"
+ "75: stb.ab %2, [%0,1] \n"
+ " sub %1, %1, 1 \n"
+ "1: bbit0 %0, 1, 2f \n"
+ "76: stw.ab %2, [%0,2] \n"
+ " sub %1, %1, 2 \n"
+ "2: asr.f lp_count, %1, 2 \n"
+ " lpnz 3f \n"
+ "77: st.ab %2, [%0,4] \n"
+ " sub %1, %1, 4 \n"
+ "3: bbit0 %1, 1, 4f \n"
+ "78: stw.ab %2, [%0,2] \n"
+ " sub %1, %1, 2 \n"
+ "4: bbit0 %1, 0, 5f \n"
+ "79: stb.ab %2, [%0,1] \n"
+ " sub %1, %1, 1 \n"
+ "5: \n"
+ " .section .fixup, \"ax\" \n"
+ " .align 4 \n"
+ "3: j 5b \n"
+ " .previous \n"
+ " .section __ex_table, \"a\" \n"
+ " .align 4 \n"
+ " .word 75b, 3b \n"
+ " .word 76b, 3b \n"
+ " .word 77b, 3b \n"
+ " .word 78b, 3b \n"
+ " .word 79b, 3b \n"
+ " .previous \n"
+ : "+r"(d_char), "+r"(res)
+ : "i"(0)
+ : "lp_count", "memory");
+
+ return res;
+}
+
+#ifndef CONFIG_CC_OPTIMIZE_FOR_SIZE
+
+#define INLINE_COPY_TO_USER
+#define INLINE_COPY_FROM_USER
+
+#define __clear_user(d, n) __arc_clear_user(d, n)
+#else
+extern unsigned long arc_clear_user_noinline(void __user *to,
+ unsigned long n);
+#define __clear_user(d, n) arc_clear_user_noinline(d, n)
+#endif
+
+#include <asm-generic/uaccess.h>
+
+#endif
diff --git a/arch/arc/include/asm/unaligned.h b/arch/arc/include/asm/unaligned.h
new file mode 100644
index 000000000..cf5a02382
--- /dev/null
+++ b/arch/arc/include/asm/unaligned.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef _ASM_ARC_UNALIGNED_H
+#define _ASM_ARC_UNALIGNED_H
+
+/* ARC700 can't handle unaligned Data accesses. */
+
+#include <asm-generic/unaligned.h>
+#include <asm/ptrace.h>
+
+#ifdef CONFIG_ARC_EMUL_UNALIGNED
+int misaligned_fixup(unsigned long address, struct pt_regs *regs,
+ struct callee_regs *cregs);
+#else
+static inline int
+misaligned_fixup(unsigned long address, struct pt_regs *regs,
+ struct callee_regs *cregs)
+{
+ /* Not fixed */
+ return 1;
+}
+#endif
+
+#endif /* _ASM_ARC_UNALIGNED_H */
diff --git a/arch/arc/include/asm/unwind.h b/arch/arc/include/asm/unwind.h
new file mode 100644
index 000000000..e95a20453
--- /dev/null
+++ b/arch/arc/include/asm/unwind.h
@@ -0,0 +1,156 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#ifndef _ASM_ARC_UNWIND_H
+#define _ASM_ARC_UNWIND_H
+
+#ifdef CONFIG_ARC_DW2_UNWIND
+
+#include <linux/sched.h>
+
+struct arc700_regs {
+ unsigned long r0;
+ unsigned long r1;
+ unsigned long r2;
+ unsigned long r3;
+ unsigned long r4;
+ unsigned long r5;
+ unsigned long r6;
+ unsigned long r7;
+ unsigned long r8;
+ unsigned long r9;
+ unsigned long r10;
+ unsigned long r11;
+ unsigned long r12;
+ unsigned long r13;
+ unsigned long r14;
+ unsigned long r15;
+ unsigned long r16;
+ unsigned long r17;
+ unsigned long r18;
+ unsigned long r19;
+ unsigned long r20;
+ unsigned long r21;
+ unsigned long r22;
+ unsigned long r23;
+ unsigned long r24;
+ unsigned long r25;
+ unsigned long r26;
+ unsigned long r27; /* fp */
+ unsigned long r28; /* sp */
+ unsigned long r29;
+ unsigned long r30;
+ unsigned long r31; /* blink */
+ unsigned long r63; /* pc */
+};
+
+struct unwind_frame_info {
+ struct arc700_regs regs;
+ struct task_struct *task;
+ unsigned call_frame:1;
+};
+
+#define UNW_PC(frame) ((frame)->regs.r63)
+#define UNW_SP(frame) ((frame)->regs.r28)
+#define UNW_BLINK(frame) ((frame)->regs.r31)
+
+/* Rajesh FIXME */
+#ifdef CONFIG_FRAME_POINTER
+#define UNW_FP(frame) ((frame)->regs.r27)
+#define FRAME_RETADDR_OFFSET 4
+#define FRAME_LINK_OFFSET 0
+#define STACK_BOTTOM_UNW(tsk) STACK_LIMIT((tsk)->thread.ksp)
+#define STACK_TOP_UNW(tsk) ((tsk)->thread.ksp)
+#else
+#define UNW_FP(frame) ((void)(frame), 0)
+#endif
+
+#define STACK_LIMIT(ptr) (((ptr) - 1) & ~(THREAD_SIZE - 1))
+
+#define UNW_REGISTER_INFO \
+ PTREGS_INFO(r0), \
+ PTREGS_INFO(r1), \
+ PTREGS_INFO(r2), \
+ PTREGS_INFO(r3), \
+ PTREGS_INFO(r4), \
+ PTREGS_INFO(r5), \
+ PTREGS_INFO(r6), \
+ PTREGS_INFO(r7), \
+ PTREGS_INFO(r8), \
+ PTREGS_INFO(r9), \
+ PTREGS_INFO(r10), \
+ PTREGS_INFO(r11), \
+ PTREGS_INFO(r12), \
+ PTREGS_INFO(r13), \
+ PTREGS_INFO(r14), \
+ PTREGS_INFO(r15), \
+ PTREGS_INFO(r16), \
+ PTREGS_INFO(r17), \
+ PTREGS_INFO(r18), \
+ PTREGS_INFO(r19), \
+ PTREGS_INFO(r20), \
+ PTREGS_INFO(r21), \
+ PTREGS_INFO(r22), \
+ PTREGS_INFO(r23), \
+ PTREGS_INFO(r24), \
+ PTREGS_INFO(r25), \
+ PTREGS_INFO(r26), \
+ PTREGS_INFO(r27), \
+ PTREGS_INFO(r28), \
+ PTREGS_INFO(r29), \
+ PTREGS_INFO(r30), \
+ PTREGS_INFO(r31), \
+ PTREGS_INFO(r63)
+
+#define UNW_DEFAULT_RA(raItem, dataAlign) \
+ ((raItem).where == Memory && !((raItem).value * (dataAlign) + 4))
+
+extern int arc_unwind(struct unwind_frame_info *frame);
+extern void arc_unwind_init(void);
+extern void *unwind_add_table(struct module *module, const void *table_start,
+ unsigned long table_size);
+extern void unwind_remove_table(void *handle, int init_only);
+
+static inline int
+arch_unwind_init_running(struct unwind_frame_info *info,
+ int (*callback) (struct unwind_frame_info *info,
+ void *arg),
+ void *arg)
+{
+ return 0;
+}
+
+static inline int arch_unw_user_mode(const struct unwind_frame_info *info)
+{
+ return 0;
+}
+
+static inline void arch_unw_init_blocked(struct unwind_frame_info *info)
+{
+ return;
+}
+
+static inline void arch_unw_init_frame_info(struct unwind_frame_info *info,
+ struct pt_regs *regs)
+{
+ return;
+}
+
+#else
+
+#define UNW_PC(frame) ((void)(frame), 0)
+#define UNW_SP(frame) ((void)(frame), 0)
+#define UNW_FP(frame) ((void)(frame), 0)
+
+static inline void arc_unwind_init(void)
+{
+}
+
+#define unwind_add_table(a, b, c)
+#define unwind_remove_table(a, b)
+
+#endif /* CONFIG_ARC_DW2_UNWIND */
+
+#endif /* _ASM_ARC_UNWIND_H */
diff --git a/arch/arc/include/asm/vermagic.h b/arch/arc/include/asm/vermagic.h
new file mode 100644
index 000000000..a10257d2c
--- /dev/null
+++ b/arch/arc/include/asm/vermagic.h
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef _ASM_VERMAGIC_H
+#define _ASM_VERMAGIC_H
+
+#define MODULE_ARCH_VERMAGIC "ARC700"
+
+#endif /* _ASM_VERMAGIC_H */
diff --git a/arch/arc/include/asm/vmalloc.h b/arch/arc/include/asm/vmalloc.h
new file mode 100644
index 000000000..973095aad
--- /dev/null
+++ b/arch/arc/include/asm/vmalloc.h
@@ -0,0 +1,4 @@
+#ifndef _ASM_ARC_VMALLOC_H
+#define _ASM_ARC_VMALLOC_H
+
+#endif /* _ASM_ARC_VMALLOC_H */
diff --git a/arch/arc/include/uapi/asm/Kbuild b/arch/arc/include/uapi/asm/Kbuild
new file mode 100644
index 000000000..e78470141
--- /dev/null
+++ b/arch/arc/include/uapi/asm/Kbuild
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0
+generic-y += ucontext.h
diff --git a/arch/arc/include/uapi/asm/bpf_perf_event.h b/arch/arc/include/uapi/asm/bpf_perf_event.h
new file mode 100644
index 000000000..6cb1c2823
--- /dev/null
+++ b/arch/arc/include/uapi/asm/bpf_perf_event.h
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _UAPI__ASM_BPF_PERF_EVENT_H__
+#define _UAPI__ASM_BPF_PERF_EVENT_H__
+
+#include <asm/ptrace.h>
+
+typedef struct user_regs_struct bpf_user_pt_regs_t;
+
+#endif /* _UAPI__ASM_BPF_PERF_EVENT_H__ */
diff --git a/arch/arc/include/uapi/asm/byteorder.h b/arch/arc/include/uapi/asm/byteorder.h
new file mode 100644
index 000000000..554011153
--- /dev/null
+++ b/arch/arc/include/uapi/asm/byteorder.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __ASM_ARC_BYTEORDER_H
+#define __ASM_ARC_BYTEORDER_H
+
+#ifdef __BIG_ENDIAN__
+#include <linux/byteorder/big_endian.h>
+#else
+#include <linux/byteorder/little_endian.h>
+#endif
+
+#endif /* ASM_ARC_BYTEORDER_H */
diff --git a/arch/arc/include/uapi/asm/cachectl.h b/arch/arc/include/uapi/asm/cachectl.h
new file mode 100644
index 000000000..0e4f2affc
--- /dev/null
+++ b/arch/arc/include/uapi/asm/cachectl.h
@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __ARC_ASM_CACHECTL_H
+#define __ARC_ASM_CACHECTL_H
+
+/*
+ * ARC ABI flags defined for Android's finegrained cacheflush requirements
+ */
+#define CF_I_INV 0x0002
+#define CF_D_FLUSH 0x0010
+#define CF_D_FLUSH_INV 0x0020
+
+#define CF_DEFAULT (CF_I_INV | CF_D_FLUSH)
+
+/*
+ * Standard flags expected by cacheflush system call users
+ */
+#define ICACHE CF_I_INV
+#define DCACHE CF_D_FLUSH
+#define BCACHE (CF_I_INV | CF_D_FLUSH)
+
+#endif
diff --git a/arch/arc/include/uapi/asm/elf.h b/arch/arc/include/uapi/asm/elf.h
new file mode 100644
index 000000000..3c1dae4e5
--- /dev/null
+++ b/arch/arc/include/uapi/asm/elf.h
@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef _UAPI__ASM_ARC_ELF_H
+#define _UAPI__ASM_ARC_ELF_H
+
+#include <asm/ptrace.h> /* for user_regs_struct */
+
+/* Machine specific ELF Hdr flags */
+#define EF_ARC_OSABI_MSK 0x00000f00
+
+#define EF_ARC_OSABI_V3 0x00000300 /* v3 (no legacy syscalls) */
+#define EF_ARC_OSABI_V4 0x00000400 /* v4 (64bit data any reg align) */
+
+#if __GNUC__ < 6
+#define EF_ARC_OSABI_CURRENT EF_ARC_OSABI_V3
+#else
+#define EF_ARC_OSABI_CURRENT EF_ARC_OSABI_V4
+#endif
+
+typedef unsigned long elf_greg_t;
+typedef unsigned long elf_fpregset_t;
+
+#define ELF_NGREG (sizeof(struct user_regs_struct) / sizeof(elf_greg_t))
+#define ELF_ARCV2REG (sizeof(struct user_regs_arcv2) / sizeof(elf_greg_t))
+
+typedef elf_greg_t elf_gregset_t[ELF_NGREG];
+
+#endif
diff --git a/arch/arc/include/uapi/asm/page.h b/arch/arc/include/uapi/asm/page.h
new file mode 100644
index 000000000..2a4ad619a
--- /dev/null
+++ b/arch/arc/include/uapi/asm/page.h
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef _UAPI__ASM_ARC_PAGE_H
+#define _UAPI__ASM_ARC_PAGE_H
+
+#include <linux/const.h>
+
+/* PAGE_SHIFT determines the page size */
+#if defined(CONFIG_ARC_PAGE_SIZE_16K)
+#define PAGE_SHIFT 14
+#elif defined(CONFIG_ARC_PAGE_SIZE_4K)
+#define PAGE_SHIFT 12
+#else
+/*
+ * Default 8k
+ * done this way (instead of under CONFIG_ARC_PAGE_SIZE_8K) because adhoc
+ * user code (busybox appletlib.h) expects PAGE_SHIFT to be defined w/o
+ * using the correct uClibc header and in their build our autoconf.h is
+ * not available
+ */
+#define PAGE_SHIFT 13
+#endif
+
+#define PAGE_SIZE _BITUL(PAGE_SHIFT) /* Default 8K */
+#define PAGE_OFFSET _AC(0x80000000, UL) /* Kernel starts at 2G onwrds */
+
+#define PAGE_MASK (~(PAGE_SIZE-1))
+
+#endif /* _UAPI__ASM_ARC_PAGE_H */
diff --git a/arch/arc/include/uapi/asm/ptrace.h b/arch/arc/include/uapi/asm/ptrace.h
new file mode 100644
index 000000000..2a6eff57f
--- /dev/null
+++ b/arch/arc/include/uapi/asm/ptrace.h
@@ -0,0 +1,58 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Amit Bhor, Sameer Dhavale: Codito Technologies 2004
+ */
+
+#ifndef _UAPI__ASM_ARC_PTRACE_H
+#define _UAPI__ASM_ARC_PTRACE_H
+
+#define PTRACE_GET_THREAD_AREA 25
+
+#ifndef __ASSEMBLY__
+/*
+ * Userspace ABI: Register state needed by
+ * -ptrace (gdbserver)
+ * -sigcontext (SA_SIGNINFO signal frame)
+ *
+ * This is to decouple pt_regs from user-space ABI, to be able to change it
+ * w/o affecting the ABI.
+ *
+ * The intermediate pad,pad2 are relics of initial layout based on pt_regs
+ * for optimizations when copying pt_regs to/from user_regs_struct.
+ * We no longer need them, but can't be changed as they are part of ABI now.
+ *
+ * Also, sigcontext only care about the scratch regs as that is what we really
+ * save/restore for signal handling. However gdb also uses the same struct
+ * hence callee regs need to be in there too.
+*/
+struct user_regs_struct {
+
+ unsigned long pad;
+ struct {
+ unsigned long bta, lp_start, lp_end, lp_count;
+ unsigned long status32, ret, blink, fp, gp;
+ unsigned long r12, r11, r10, r9, r8, r7, r6, r5, r4, r3, r2, r1, r0;
+ unsigned long sp;
+ } scratch;
+ unsigned long pad2;
+ struct {
+ unsigned long r25, r24, r23, r22, r21, r20;
+ unsigned long r19, r18, r17, r16, r15, r14, r13;
+ } callee;
+ unsigned long efa; /* break pt addr, for break points in delay slots */
+ unsigned long stop_pc; /* give dbg stop_pc after ensuring brkpt trap */
+};
+
+struct user_regs_arcv2 {
+ unsigned long r30, r58, r59;
+};
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* _UAPI__ASM_ARC_PTRACE_H */
diff --git a/arch/arc/include/uapi/asm/setup.h b/arch/arc/include/uapi/asm/setup.h
new file mode 100644
index 000000000..a6d4e4493
--- /dev/null
+++ b/arch/arc/include/uapi/asm/setup.h
@@ -0,0 +1,6 @@
+/*
+ * setup.h is part of userspace header ABI so UAPI scripts have to generate it
+ * even if there's nothing to export - causing empty <uapi/asm/setup.h>
+ * However to prevent "patch" from discarding it we add this placeholder
+ * comment
+ */
diff --git a/arch/arc/include/uapi/asm/sigcontext.h b/arch/arc/include/uapi/asm/sigcontext.h
new file mode 100644
index 000000000..7a5449dfc
--- /dev/null
+++ b/arch/arc/include/uapi/asm/sigcontext.h
@@ -0,0 +1,24 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef _ASM_ARC_SIGCONTEXT_H
+#define _ASM_ARC_SIGCONTEXT_H
+
+#include <asm/ptrace.h>
+
+/*
+ * Signal context structure - contains all info to do with the state
+ * before the signal handler was invoked.
+ */
+struct sigcontext {
+ struct user_regs_struct regs;
+ struct user_regs_arcv2 v2abi;
+};
+
+#endif /* _ASM_ARC_SIGCONTEXT_H */
diff --git a/arch/arc/include/uapi/asm/signal.h b/arch/arc/include/uapi/asm/signal.h
new file mode 100644
index 000000000..ba3143a1b
--- /dev/null
+++ b/arch/arc/include/uapi/asm/signal.h
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Amit Bhor, Sameer Dhavale: Codito Technologies 2004
+ */
+
+#ifndef _ASM_ARC_SIGNAL_H
+#define _ASM_ARC_SIGNAL_H
+
+/*
+ * This is much needed for ARC sigreturn optimization.
+ * This allows uClibc to piggback the addr of a sigreturn stub in sigaction,
+ * which allows sigreturn based re-entry into kernel after handling signal.
+ * W/o this kernel needs to "synthesize" the sigreturn trampoline on user
+ * mode stack which in turn forces the following:
+ * -TLB Flush (after making the stack page executable)
+ * -Cache line Flush (to make I/D Cache lines coherent)
+ */
+#define SA_RESTORER 0x04000000
+
+#include <asm-generic/signal.h>
+
+#endif /* _ASM_ARC_SIGNAL_H */
diff --git a/arch/arc/include/uapi/asm/swab.h b/arch/arc/include/uapi/asm/swab.h
new file mode 100644
index 000000000..02109cd48
--- /dev/null
+++ b/arch/arc/include/uapi/asm/swab.h
@@ -0,0 +1,99 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * vineetg: May 2011
+ * -Support single cycle endian-swap insn in ARC700 4.10
+ *
+ * vineetg: June 2009
+ * -Better htonl implementation (5 instead of 9 ALU instructions)
+ * -Hardware assisted single cycle bswap (Use Case of ARC custom instrn)
+ */
+
+#ifndef __ASM_ARC_SWAB_H
+#define __ASM_ARC_SWAB_H
+
+#include <linux/types.h>
+
+/* Native single cycle endian swap insn */
+#ifdef CONFIG_ARC_HAS_SWAPE
+
+#define __arch_swab32(x) \
+({ \
+ unsigned int tmp = x; \
+ __asm__( \
+ " swape %0, %1 \n" \
+ : "=r" (tmp) \
+ : "r" (tmp)); \
+ tmp; \
+})
+
+#else
+
+/* Several ways of Endian-Swap Emulation for ARC
+ * 0: kernel generic
+ * 1: ARC optimised "C"
+ * 2: ARC Custom instruction
+ */
+#define ARC_BSWAP_TYPE 1
+
+#if (ARC_BSWAP_TYPE == 1) /******* Software only ********/
+
+/* The kernel default implementation of htonl is
+ * return x<<24 | x>>24 |
+ * (x & (__u32)0x0000ff00UL)<<8 | (x & (__u32)0x00ff0000UL)>>8;
+ *
+ * This generates 9 instructions on ARC (excluding the ld/st)
+ *
+ * 8051fd8c: ld r3,[r7,20] ; Mem op : Get the value to be swapped
+ * 8051fd98: asl r5,r3,24 ; get 3rd Byte
+ * 8051fd9c: lsr r2,r3,24 ; get 0th Byte
+ * 8051fda0: and r4,r3,0xff00
+ * 8051fda8: asl r4,r4,8 ; get 1st Byte
+ * 8051fdac: and r3,r3,0x00ff0000
+ * 8051fdb4: or r2,r2,r5 ; combine 0th and 3rd Bytes
+ * 8051fdb8: lsr r3,r3,8 ; 2nd Byte at correct place in Dst Reg
+ * 8051fdbc: or r2,r2,r4 ; combine 0,3 Bytes with 1st Byte
+ * 8051fdc0: or r2,r2,r3 ; combine 0,3,1 Bytes with 2nd Byte
+ * 8051fdc4: st r2,[r1,20] ; Mem op : save result back to mem
+ *
+ * Joern suggested a better "C" algorithm which is great since
+ * (1) It is portable to any architecure
+ * (2) At the same time it takes advantage of ARC ISA (rotate intrns)
+ */
+
+#define __arch_swab32(x) \
+({ unsigned long __in = (x), __tmp; \
+ __tmp = __in << 8 | __in >> 24; /* ror tmp,in,24 */ \
+ __in = __in << 24 | __in >> 8; /* ror in,in,8 */ \
+ __tmp ^= __in; \
+ __tmp &= 0xff00ff; \
+ __tmp ^ __in; \
+})
+
+#elif (ARC_BSWAP_TYPE == 2) /* Custom single cycle bswap instruction */
+
+#define __arch_swab32(x) \
+({ \
+ unsigned int tmp = x; \
+ __asm__( \
+ " .extInstruction bswap, 7, 0x00, SUFFIX_NONE, SYNTAX_2OP \n"\
+ " bswap %0, %1 \n"\
+ : "=r" (tmp) \
+ : "r" (tmp)); \
+ tmp; \
+})
+
+#endif /* ARC_BSWAP_TYPE=zzz */
+
+#endif /* CONFIG_ARC_HAS_SWAPE */
+
+#if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
+#define __SWAB_64_THRU_32__
+#endif
+
+#endif
diff --git a/arch/arc/include/uapi/asm/unistd.h b/arch/arc/include/uapi/asm/unistd.h
new file mode 100644
index 000000000..fa2713ae6
--- /dev/null
+++ b/arch/arc/include/uapi/asm/unistd.h
@@ -0,0 +1,52 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/******** no-legacy-syscalls-ABI *******/
+
+/*
+ * Non-typical guard macro to enable inclusion twice in ARCH sys.c
+ * That is how the Generic syscall wrapper generator works
+ */
+#if !defined(_UAPI_ASM_ARC_UNISTD_H) || defined(__SYSCALL)
+#define _UAPI_ASM_ARC_UNISTD_H
+
+#define __ARCH_WANT_RENAMEAT
+#define __ARCH_WANT_STAT64
+#define __ARCH_WANT_SET_GET_RLIMIT
+#define __ARCH_WANT_SYS_EXECVE
+#define __ARCH_WANT_SYS_CLONE
+#define __ARCH_WANT_SYS_CLONE3
+#define __ARCH_WANT_SYS_VFORK
+#define __ARCH_WANT_SYS_FORK
+#define __ARCH_WANT_TIME32_SYSCALLS
+
+#define sys_mmap2 sys_mmap_pgoff
+
+#include <asm-generic/unistd.h>
+
+#define NR_syscalls __NR_syscalls
+
+/* Generic syscall (fs/filesystems.c - lost in asm-generic/unistd.h */
+#define __NR_sysfs (__NR_arch_specific_syscall + 3)
+
+/* ARC specific syscall */
+#define __NR_cacheflush (__NR_arch_specific_syscall + 0)
+#define __NR_arc_settls (__NR_arch_specific_syscall + 1)
+#define __NR_arc_gettls (__NR_arch_specific_syscall + 2)
+#define __NR_arc_usr_cmpxchg (__NR_arch_specific_syscall + 4)
+
+__SYSCALL(__NR_cacheflush, sys_cacheflush)
+__SYSCALL(__NR_arc_settls, sys_arc_settls)
+__SYSCALL(__NR_arc_gettls, sys_arc_gettls)
+__SYSCALL(__NR_arc_usr_cmpxchg, sys_arc_usr_cmpxchg)
+__SYSCALL(__NR_sysfs, sys_sysfs)
+
+#undef __SYSCALL
+
+#endif