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-rw-r--r--arch/sh/kernel/cpu/sh2/Makefile12
-rw-r--r--arch/sh/kernel/cpu/sh2/clock-sh7619.c74
-rw-r--r--arch/sh/kernel/cpu/sh2/entry.S373
-rw-r--r--arch/sh/kernel/cpu/sh2/ex.S44
-rw-r--r--arch/sh/kernel/cpu/sh2/probe.c71
-rw-r--r--arch/sh/kernel/cpu/sh2/setup-sh7619.c205
-rw-r--r--arch/sh/kernel/cpu/sh2/smp-j2.c136
7 files changed, 915 insertions, 0 deletions
diff --git a/arch/sh/kernel/cpu/sh2/Makefile b/arch/sh/kernel/cpu/sh2/Makefile
new file mode 100644
index 000000000..214c3a5b1
--- /dev/null
+++ b/arch/sh/kernel/cpu/sh2/Makefile
@@ -0,0 +1,12 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the Linux/SuperH SH-2 backends.
+#
+
+obj-y := ex.o probe.o entry.o
+
+obj-$(CONFIG_CPU_SUBTYPE_SH7619) += setup-sh7619.o clock-sh7619.o
+
+# SMP setup
+smp-$(CONFIG_CPU_J2) := smp-j2.o
+obj-$(CONFIG_SMP) += $(smp-y)
diff --git a/arch/sh/kernel/cpu/sh2/clock-sh7619.c b/arch/sh/kernel/cpu/sh2/clock-sh7619.c
new file mode 100644
index 000000000..d66d194c7
--- /dev/null
+++ b/arch/sh/kernel/cpu/sh2/clock-sh7619.c
@@ -0,0 +1,74 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * arch/sh/kernel/cpu/sh2/clock-sh7619.c
+ *
+ * SH7619 support for the clock framework
+ *
+ * Copyright (C) 2006 Yoshinori Sato
+ *
+ * Based on clock-sh4.c
+ * Copyright (C) 2005 Paul Mundt
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/io.h>
+#include <asm/clock.h>
+#include <asm/freq.h>
+#include <asm/processor.h>
+
+static const int pll1rate[] = {1,2};
+static const int pfc_divisors[] = {1,2,0,4};
+static unsigned int pll2_mult;
+
+static void master_clk_init(struct clk *clk)
+{
+ clk->rate *= pll2_mult * pll1rate[(__raw_readw(FREQCR) >> 8) & 7];
+}
+
+static struct sh_clk_ops sh7619_master_clk_ops = {
+ .init = master_clk_init,
+};
+
+static unsigned long module_clk_recalc(struct clk *clk)
+{
+ int idx = (__raw_readw(FREQCR) & 0x0007);
+ return clk->parent->rate / pfc_divisors[idx];
+}
+
+static struct sh_clk_ops sh7619_module_clk_ops = {
+ .recalc = module_clk_recalc,
+};
+
+static unsigned long bus_clk_recalc(struct clk *clk)
+{
+ return clk->parent->rate / pll1rate[(__raw_readw(FREQCR) >> 8) & 7];
+}
+
+static struct sh_clk_ops sh7619_bus_clk_ops = {
+ .recalc = bus_clk_recalc,
+};
+
+static struct sh_clk_ops sh7619_cpu_clk_ops = {
+ .recalc = followparent_recalc,
+};
+
+static struct sh_clk_ops *sh7619_clk_ops[] = {
+ &sh7619_master_clk_ops,
+ &sh7619_module_clk_ops,
+ &sh7619_bus_clk_ops,
+ &sh7619_cpu_clk_ops,
+};
+
+void __init arch_init_clk_ops(struct sh_clk_ops **ops, int idx)
+{
+ if (test_mode_pin(MODE_PIN2 | MODE_PIN0) ||
+ test_mode_pin(MODE_PIN2 | MODE_PIN1))
+ pll2_mult = 2;
+ else if (test_mode_pin(MODE_PIN0) || test_mode_pin(MODE_PIN1))
+ pll2_mult = 4;
+
+ BUG_ON(!pll2_mult);
+
+ if (idx < ARRAY_SIZE(sh7619_clk_ops))
+ *ops = sh7619_clk_ops[idx];
+}
diff --git a/arch/sh/kernel/cpu/sh2/entry.S b/arch/sh/kernel/cpu/sh2/entry.S
new file mode 100644
index 000000000..0a1c2bf21
--- /dev/null
+++ b/arch/sh/kernel/cpu/sh2/entry.S
@@ -0,0 +1,373 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * arch/sh/kernel/cpu/sh2/entry.S
+ *
+ * The SH-2 exception entry
+ *
+ * Copyright (C) 2005-2008 Yoshinori Sato
+ * Copyright (C) 2005 AXE,Inc.
+ */
+
+#include <linux/linkage.h>
+#include <asm/asm-offsets.h>
+#include <asm/thread_info.h>
+#include <cpu/mmu_context.h>
+#include <asm/unistd.h>
+#include <asm/errno.h>
+#include <asm/page.h>
+
+/* Offsets to the stack */
+OFF_R0 = 0 /* Return value. New ABI also arg4 */
+OFF_R1 = 4 /* New ABI: arg5 */
+OFF_R2 = 8 /* New ABI: arg6 */
+OFF_R3 = 12 /* New ABI: syscall_nr */
+OFF_R4 = 16 /* New ABI: arg0 */
+OFF_R5 = 20 /* New ABI: arg1 */
+OFF_R6 = 24 /* New ABI: arg2 */
+OFF_R7 = 28 /* New ABI: arg3 */
+OFF_SP = (15*4)
+OFF_PC = (16*4)
+OFF_SR = (16*4+2*4)
+OFF_TRA = (16*4+6*4)
+
+#include <asm/entry-macros.S>
+
+ENTRY(exception_handler)
+ ! stack
+ ! r0 <- point sp
+ ! r1
+ ! pc
+ ! sr
+ ! r0 = temporary
+ ! r1 = vector (pseudo EXPEVT / INTEVT / TRA)
+ mov.l r2,@-sp
+ mov.l r3,@-sp
+ cli
+ mov.l $cpu_mode,r2
+#ifdef CONFIG_SMP
+ mov.l $cpuid,r3
+ mov.l @r3,r3
+ mov.l @r3,r3
+ shll2 r3
+ add r3,r2
+#endif
+ mov.l @r2,r0
+ mov.l @(5*4,r15),r3 ! previous SR
+ or r0,r3 ! set MD
+ tst r0,r0
+ bf/s 1f ! previous mode check
+ mov.l r3,@(5*4,r15) ! update SR
+ ! switch to kernel mode
+ mov.l __md_bit,r0
+ mov.l r0,@r2 ! enter kernel mode
+ mov.l $current_thread_info,r2
+#ifdef CONFIG_SMP
+ mov.l $cpuid,r0
+ mov.l @r0,r0
+ mov.l @r0,r0
+ shll2 r0
+ add r0,r2
+#endif
+ mov.l @r2,r2
+ mov #(THREAD_SIZE >> 8),r0
+ shll8 r0
+ add r2,r0
+ mov r15,r2 ! r2 = user stack top
+ mov r0,r15 ! switch kernel stack
+ mov.l r1,@-r15 ! TRA
+ sts.l macl, @-r15
+ sts.l mach, @-r15
+ stc.l gbr, @-r15
+ mov.l @(5*4,r2),r0
+ mov.l r0,@-r15 ! original SR
+ sts.l pr,@-r15
+ mov.l @(4*4,r2),r0
+ mov.l r0,@-r15 ! original PC
+ mov r2,r3
+ add #(4+2)*4,r3 ! rewind r0 - r3 + exception frame
+ mov.l r3,@-r15 ! original SP
+ mov.l r14,@-r15
+ mov.l r13,@-r15
+ mov.l r12,@-r15
+ mov.l r11,@-r15
+ mov.l r10,@-r15
+ mov.l r9,@-r15
+ mov.l r8,@-r15
+ mov.l r7,@-r15
+ mov.l r6,@-r15
+ mov.l r5,@-r15
+ mov.l r4,@-r15
+ mov r1,r9 ! save TRA
+ mov r2,r8 ! copy user -> kernel stack
+ mov.l @(0,r8),r3
+ mov.l r3,@-r15
+ mov.l @(4,r8),r2
+ mov.l r2,@-r15
+ mov.l @(12,r8),r1
+ mov.l r1,@-r15
+ mov.l @(8,r8),r0
+ bra 2f
+ mov.l r0,@-r15
+1:
+ ! in kernel exception
+ mov #(22-4-4-1)*4+4,r0
+ mov r15,r2
+ sub r0,r15
+ mov.l @r2+,r0 ! old R3
+ mov.l r0,@-r15
+ mov.l @r2+,r0 ! old R2
+ mov.l r0,@-r15
+ mov.l @(4,r2),r0 ! old R1
+ mov.l r0,@-r15
+ mov.l @r2,r0 ! old R0
+ mov.l r0,@-r15
+ add #8,r2
+ mov.l @r2+,r3 ! old PC
+ mov.l @r2+,r0 ! old SR
+ add #-4,r2 ! exception frame stub (sr)
+ mov.l r1,@-r2 ! TRA
+ sts.l macl, @-r2
+ sts.l mach, @-r2
+ stc.l gbr, @-r2
+ mov.l r0,@-r2 ! save old SR
+ sts.l pr,@-r2
+ mov.l r3,@-r2 ! save old PC
+ mov r2,r0
+ add #8*4,r0
+ mov.l r0,@-r2 ! save old SP
+ mov.l r14,@-r2
+ mov.l r13,@-r2
+ mov.l r12,@-r2
+ mov.l r11,@-r2
+ mov.l r10,@-r2
+ mov.l r9,@-r2
+ mov.l r8,@-r2
+ mov.l r7,@-r2
+ mov.l r6,@-r2
+ mov.l r5,@-r2
+ mov.l r4,@-r2
+ mov r1,r9
+ mov.l @(OFF_R0,r15),r0
+ mov.l @(OFF_R1,r15),r1
+ mov.l @(OFF_R2,r15),r2
+ mov.l @(OFF_R3,r15),r3
+2:
+ mov #64,r8
+ cmp/hs r8,r9
+ bt interrupt_entry ! vec >= 64 is interrupt
+ mov #31,r8
+ cmp/hs r8,r9
+ bt trap_entry ! 64 > vec >= 31 is trap
+#ifdef CONFIG_CPU_J2
+ mov #16,r8
+ cmp/hs r8,r9
+ bt interrupt_entry ! 31 > vec >= 16 is interrupt
+#endif
+
+ mov.l 4f,r8
+ mov r9,r4
+ shll2 r9
+ add r9,r8
+ mov.l @r8,r8 ! exception handler address
+ tst r8,r8
+ bf 3f
+ mov.l 8f,r8 ! unhandled exception
+3:
+ mov.l 5f,r10
+ jmp @r8
+ lds r10,pr
+
+interrupt_entry:
+ mov r9,r4
+ mov r15,r5
+ mov.l 6f,r9
+ mov.l 7f,r8
+ jmp @r8
+ lds r9,pr
+
+ .align 2
+4: .long exception_handling_table
+5: .long ret_from_exception
+6: .long ret_from_irq
+7: .long do_IRQ
+8: .long exception_error
+
+trap_entry:
+ mov #0x30,r8
+ cmp/ge r8,r9 ! vector 0x1f-0x2f is systemcall
+ bt 1f
+ mov #0x1f,r9 ! convert to unified SH2/3/4 trap number
+1:
+ shll2 r9 ! TRA
+ bra system_call ! jump common systemcall entry
+ mov r9,r8
+
+#if defined(CONFIG_SH_STANDARD_BIOS)
+ /* Unwind the stack and jmp to the debug entry */
+ENTRY(sh_bios_handler)
+ mov r15,r0
+ add #(22-4)*4-4,r0
+ ldc.l @r0+,gbr
+ lds.l @r0+,mach
+ lds.l @r0+,macl
+ mov r15,r0
+ mov.l @(OFF_SP,r0),r1
+ mov #OFF_SR,r2
+ mov.l @(r0,r2),r3
+ mov.l r3,@-r1
+ mov #OFF_SP,r2
+ mov.l @(r0,r2),r3
+ mov.l r3,@-r1
+ mov r15,r0
+ add #(22-4)*4-8,r0
+ mov.l 1f,r2
+ mov.l @r2,r2
+ stc sr,r3
+ mov.l r2,@r0
+ mov.l r3,@(4,r0)
+ mov.l r1,@(8,r0)
+ mov.l @r15+, r0
+ mov.l @r15+, r1
+ mov.l @r15+, r2
+ mov.l @r15+, r3
+ mov.l @r15+, r4
+ mov.l @r15+, r5
+ mov.l @r15+, r6
+ mov.l @r15+, r7
+ mov.l @r15+, r8
+ mov.l @r15+, r9
+ mov.l @r15+, r10
+ mov.l @r15+, r11
+ mov.l @r15+, r12
+ mov.l @r15+, r13
+ mov.l @r15+, r14
+ add #8,r15
+ lds.l @r15+, pr
+ mov.l @r15+,r15
+ rte
+ nop
+ .align 2
+1: .long gdb_vbr_vector
+#endif /* CONFIG_SH_STANDARD_BIOS */
+
+ENTRY(address_error_trap_handler)
+ mov r15,r4 ! regs
+ mov #OFF_PC,r0
+ mov.l @(r0,r15),r6 ! pc
+ mov.l 1f,r0
+ jmp @r0
+ mov #0,r5 ! writeaccess is unknown
+
+ .align 2
+1: .long do_address_error
+
+restore_all:
+ stc sr,r0
+ or #0xf0,r0
+ ldc r0,sr ! all interrupt block (same BL = 1)
+ ! restore special register
+ ! overlap exception frame
+ mov r15,r0
+ add #17*4,r0
+ lds.l @r0+,pr
+ add #4,r0
+ ldc.l @r0+,gbr
+ lds.l @r0+,mach
+ lds.l @r0+,macl
+ mov r15,r0
+ mov.l $cpu_mode,r2
+#ifdef CONFIG_SMP
+ mov.l $cpuid,r3
+ mov.l @r3,r3
+ mov.l @r3,r3
+ shll2 r3
+ add r3,r2
+#endif
+ mov #OFF_SR,r3
+ mov.l @(r0,r3),r1
+ mov.l __md_bit,r3
+ and r1,r3 ! copy MD bit
+ mov.l r3,@r2
+ shll2 r1 ! clear MD bit
+ shlr2 r1
+ mov.l @(OFF_SP,r0),r2
+ add #-8,r2
+ mov.l r2,@(OFF_SP,r0) ! point exception frame top
+ mov.l r1,@(4,r2) ! set sr
+ mov #OFF_PC,r3
+ mov.l @(r0,r3),r1
+ mov.l r1,@r2 ! set pc
+ get_current_thread_info r0, r1
+ mov.l $current_thread_info,r1
+#ifdef CONFIG_SMP
+ mov.l $cpuid,r3
+ mov.l @r3,r3
+ mov.l @r3,r3
+ shll2 r3
+ add r3,r1
+#endif
+ mov.l r0,@r1
+ mov.l @r15+,r0
+ mov.l @r15+,r1
+ mov.l @r15+,r2
+ mov.l @r15+,r3
+ mov.l @r15+,r4
+ mov.l @r15+,r5
+ mov.l @r15+,r6
+ mov.l @r15+,r7
+ mov.l @r15+,r8
+ mov.l @r15+,r9
+ mov.l @r15+,r10
+ mov.l @r15+,r11
+ mov.l @r15+,r12
+ mov.l @r15+,r13
+ mov.l @r15+,r14
+ mov.l @r15,r15
+ rte
+ nop
+
+ .align 2
+__md_bit:
+ .long 0x40000000
+$current_thread_info:
+ .long __current_thread_info
+$cpu_mode:
+ .long __cpu_mode
+#ifdef CONFIG_SMP
+$cpuid:
+ .long sh2_cpuid_addr
+#endif
+
+! common exception handler
+#include "../../entry-common.S"
+
+#ifdef CONFIG_NR_CPUS
+#define NR_CPUS CONFIG_NR_CPUS
+#else
+#define NR_CPUS 1
+#endif
+
+ .data
+! cpu operation mode
+! bit30 = MD (compatible SH3/4)
+__cpu_mode:
+ .rept NR_CPUS
+ .long 0x40000000
+ .endr
+
+#ifdef CONFIG_SMP
+.global sh2_cpuid_addr
+sh2_cpuid_addr:
+ .long dummy_cpuid
+dummy_cpuid:
+ .long 0
+#endif
+
+ .section .bss
+__current_thread_info:
+ .rept NR_CPUS
+ .long 0
+ .endr
+
+ENTRY(exception_handling_table)
+ .space 4*32
diff --git a/arch/sh/kernel/cpu/sh2/ex.S b/arch/sh/kernel/cpu/sh2/ex.S
new file mode 100644
index 000000000..dd0cc887a
--- /dev/null
+++ b/arch/sh/kernel/cpu/sh2/ex.S
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * arch/sh/kernel/cpu/sh2/ex.S
+ *
+ * The SH-2 exception vector table
+ *
+ * Copyright (C) 2005 Yoshinori Sato
+ */
+
+#include <linux/linkage.h>
+
+!
+! convert Exception Vector to Exception Number
+!
+exception_entry:
+no = 0
+ .rept 256
+ mov.l r1,@-sp
+ bra exception_trampoline
+ mov #no,r1
+no = no + 1
+ .endr
+exception_trampoline:
+ mov.l r0,@-sp
+ mov.l $exception_handler,r0
+ extu.b r1,r1
+ jmp @r0
+ extu.w r1,r1
+
+ .align 2
+$exception_entry:
+ .long exception_entry
+$exception_handler:
+ .long exception_handler
+!
+! Exception Vector Base
+!
+ .align 2
+ENTRY(vbr_base)
+vector = 0
+ .rept 256
+ .long exception_entry + vector * 6
+vector = vector + 1
+ .endr
diff --git a/arch/sh/kernel/cpu/sh2/probe.c b/arch/sh/kernel/cpu/sh2/probe.c
new file mode 100644
index 000000000..70a07f4f2
--- /dev/null
+++ b/arch/sh/kernel/cpu/sh2/probe.c
@@ -0,0 +1,71 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * arch/sh/kernel/cpu/sh2/probe.c
+ *
+ * CPU Subtype Probing for SH-2.
+ *
+ * Copyright (C) 2002 Paul Mundt
+ */
+#include <linux/init.h>
+#include <linux/of_fdt.h>
+#include <linux/smp.h>
+#include <linux/io.h>
+#include <asm/processor.h>
+#include <asm/cache.h>
+
+#if defined(CONFIG_CPU_J2)
+extern u32 __iomem *j2_ccr_base;
+static int __init scan_cache(unsigned long node, const char *uname,
+ int depth, void *data)
+{
+ if (!of_flat_dt_is_compatible(node, "jcore,cache"))
+ return 0;
+
+ j2_ccr_base = ioremap(of_flat_dt_translate_address(node), 4);
+
+ return 1;
+}
+#endif
+
+void __ref cpu_probe(void)
+{
+#if defined(CONFIG_CPU_SUBTYPE_SH7619)
+ boot_cpu_data.type = CPU_SH7619;
+ boot_cpu_data.dcache.ways = 4;
+ boot_cpu_data.dcache.way_incr = (1<<12);
+ boot_cpu_data.dcache.sets = 256;
+ boot_cpu_data.dcache.entry_shift = 4;
+ boot_cpu_data.dcache.linesz = L1_CACHE_BYTES;
+ boot_cpu_data.dcache.flags = 0;
+#endif
+
+#if defined(CONFIG_CPU_J2)
+#if defined(CONFIG_SMP)
+ unsigned cpu = hard_smp_processor_id();
+#else
+ unsigned cpu = 0;
+#endif
+ if (cpu == 0) of_scan_flat_dt(scan_cache, NULL);
+ if (j2_ccr_base) __raw_writel(0x80000303, j2_ccr_base + 4*cpu);
+ if (cpu != 0) return;
+ boot_cpu_data.type = CPU_J2;
+
+ /* These defaults are appropriate for the original/current
+ * J2 cache. Once there is a proper framework for getting cache
+ * info from device tree, we should switch to that. */
+ boot_cpu_data.dcache.ways = 1;
+ boot_cpu_data.dcache.sets = 256;
+ boot_cpu_data.dcache.entry_shift = 5;
+ boot_cpu_data.dcache.linesz = 32;
+ boot_cpu_data.dcache.flags = 0;
+
+ boot_cpu_data.flags |= CPU_HAS_CAS_L;
+#else
+ /*
+ * SH-2 doesn't have separate caches
+ */
+ boot_cpu_data.dcache.flags |= SH_CACHE_COMBINED;
+#endif
+ boot_cpu_data.icache = boot_cpu_data.dcache;
+ boot_cpu_data.family = CPU_FAMILY_SH2;
+}
diff --git a/arch/sh/kernel/cpu/sh2/setup-sh7619.c b/arch/sh/kernel/cpu/sh2/setup-sh7619.c
new file mode 100644
index 000000000..b1c877b6a
--- /dev/null
+++ b/arch/sh/kernel/cpu/sh2/setup-sh7619.c
@@ -0,0 +1,205 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * SH7619 Setup
+ *
+ * Copyright (C) 2006 Yoshinori Sato
+ * Copyright (C) 2009 Paul Mundt
+ */
+#include <linux/platform_device.h>
+#include <linux/init.h>
+#include <linux/serial.h>
+#include <linux/serial_sci.h>
+#include <linux/sh_eth.h>
+#include <linux/sh_timer.h>
+#include <linux/io.h>
+#include <asm/platform_early.h>
+
+enum {
+ UNUSED = 0,
+
+ /* interrupt sources */
+ IRQ0, IRQ1, IRQ2, IRQ3, IRQ4, IRQ5, IRQ6, IRQ7,
+ WDT, EDMAC, CMT0, CMT1,
+ SCIF0, SCIF1, SCIF2,
+ HIF_HIFI, HIF_HIFBI,
+ DMAC0, DMAC1, DMAC2, DMAC3,
+ SIOF,
+};
+
+static struct intc_vect vectors[] __initdata = {
+ INTC_IRQ(IRQ0, 64), INTC_IRQ(IRQ1, 65),
+ INTC_IRQ(IRQ2, 66), INTC_IRQ(IRQ3, 67),
+ INTC_IRQ(IRQ4, 80), INTC_IRQ(IRQ5, 81),
+ INTC_IRQ(IRQ6, 82), INTC_IRQ(IRQ7, 83),
+ INTC_IRQ(WDT, 84), INTC_IRQ(EDMAC, 85),
+ INTC_IRQ(CMT0, 86), INTC_IRQ(CMT1, 87),
+ INTC_IRQ(SCIF0, 88), INTC_IRQ(SCIF0, 89),
+ INTC_IRQ(SCIF0, 90), INTC_IRQ(SCIF0, 91),
+ INTC_IRQ(SCIF1, 92), INTC_IRQ(SCIF1, 93),
+ INTC_IRQ(SCIF1, 94), INTC_IRQ(SCIF1, 95),
+ INTC_IRQ(SCIF2, 96), INTC_IRQ(SCIF2, 97),
+ INTC_IRQ(SCIF2, 98), INTC_IRQ(SCIF2, 99),
+ INTC_IRQ(HIF_HIFI, 100), INTC_IRQ(HIF_HIFBI, 101),
+ INTC_IRQ(DMAC0, 104), INTC_IRQ(DMAC1, 105),
+ INTC_IRQ(DMAC2, 106), INTC_IRQ(DMAC3, 107),
+ INTC_IRQ(SIOF, 108),
+};
+
+static struct intc_prio_reg prio_registers[] __initdata = {
+ { 0xf8140006, 0, 16, 4, /* IPRA */ { IRQ0, IRQ1, IRQ2, IRQ3 } },
+ { 0xf8140008, 0, 16, 4, /* IPRB */ { IRQ4, IRQ5, IRQ6, IRQ7 } },
+ { 0xf8080000, 0, 16, 4, /* IPRC */ { WDT, EDMAC, CMT0, CMT1 } },
+ { 0xf8080002, 0, 16, 4, /* IPRD */ { SCIF0, SCIF1, SCIF2 } },
+ { 0xf8080004, 0, 16, 4, /* IPRE */ { HIF_HIFI, HIF_HIFBI } },
+ { 0xf8080006, 0, 16, 4, /* IPRF */ { DMAC0, DMAC1, DMAC2, DMAC3 } },
+ { 0xf8080008, 0, 16, 4, /* IPRG */ { SIOF } },
+};
+
+static DECLARE_INTC_DESC(intc_desc, "sh7619", vectors, NULL,
+ NULL, prio_registers, NULL);
+
+static struct plat_sci_port scif0_platform_data = {
+ .scscr = SCSCR_REIE,
+ .type = PORT_SCIF,
+};
+
+static struct resource scif0_resources[] = {
+ DEFINE_RES_MEM(0xf8400000, 0x100),
+ DEFINE_RES_IRQ(88),
+};
+
+static struct platform_device scif0_device = {
+ .name = "sh-sci",
+ .id = 0,
+ .resource = scif0_resources,
+ .num_resources = ARRAY_SIZE(scif0_resources),
+ .dev = {
+ .platform_data = &scif0_platform_data,
+ },
+};
+
+static struct plat_sci_port scif1_platform_data = {
+ .scscr = SCSCR_REIE,
+ .type = PORT_SCIF,
+};
+
+static struct resource scif1_resources[] = {
+ DEFINE_RES_MEM(0xf8410000, 0x100),
+ DEFINE_RES_IRQ(92),
+};
+
+static struct platform_device scif1_device = {
+ .name = "sh-sci",
+ .id = 1,
+ .resource = scif1_resources,
+ .num_resources = ARRAY_SIZE(scif1_resources),
+ .dev = {
+ .platform_data = &scif1_platform_data,
+ },
+};
+
+static struct plat_sci_port scif2_platform_data = {
+ .scscr = SCSCR_REIE,
+ .type = PORT_SCIF,
+};
+
+static struct resource scif2_resources[] = {
+ DEFINE_RES_MEM(0xf8420000, 0x100),
+ DEFINE_RES_IRQ(96),
+};
+
+static struct platform_device scif2_device = {
+ .name = "sh-sci",
+ .id = 2,
+ .resource = scif2_resources,
+ .num_resources = ARRAY_SIZE(scif2_resources),
+ .dev = {
+ .platform_data = &scif2_platform_data,
+ },
+};
+
+static struct sh_eth_plat_data eth_platform_data = {
+ .phy = 1,
+ .phy_interface = PHY_INTERFACE_MODE_MII,
+};
+
+static struct resource eth_resources[] = {
+ [0] = {
+ .start = 0xfb000000,
+ .end = 0xfb0001c7,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = 85,
+ .end = 85,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct platform_device eth_device = {
+ .name = "sh7619-ether",
+ .id = -1,
+ .dev = {
+ .platform_data = &eth_platform_data,
+ },
+ .num_resources = ARRAY_SIZE(eth_resources),
+ .resource = eth_resources,
+};
+
+static struct sh_timer_config cmt_platform_data = {
+ .channels_mask = 3,
+};
+
+static struct resource cmt_resources[] = {
+ DEFINE_RES_MEM(0xf84a0070, 0x10),
+ DEFINE_RES_IRQ(86),
+ DEFINE_RES_IRQ(87),
+};
+
+static struct platform_device cmt_device = {
+ .name = "sh-cmt-16",
+ .id = 0,
+ .dev = {
+ .platform_data = &cmt_platform_data,
+ },
+ .resource = cmt_resources,
+ .num_resources = ARRAY_SIZE(cmt_resources),
+};
+
+static struct platform_device *sh7619_devices[] __initdata = {
+ &scif0_device,
+ &scif1_device,
+ &scif2_device,
+ &eth_device,
+ &cmt_device,
+};
+
+static int __init sh7619_devices_setup(void)
+{
+ return platform_add_devices(sh7619_devices,
+ ARRAY_SIZE(sh7619_devices));
+}
+arch_initcall(sh7619_devices_setup);
+
+void __init plat_irq_setup(void)
+{
+ register_intc_controller(&intc_desc);
+}
+
+static struct platform_device *sh7619_early_devices[] __initdata = {
+ &scif0_device,
+ &scif1_device,
+ &scif2_device,
+ &cmt_device,
+};
+
+#define STBCR3 0xf80a0000
+
+void __init plat_early_device_setup(void)
+{
+ /* enable CMT clock */
+ __raw_writeb(__raw_readb(STBCR3) & ~0x10, STBCR3);
+
+ sh_early_platform_add_devices(sh7619_early_devices,
+ ARRAY_SIZE(sh7619_early_devices));
+}
diff --git a/arch/sh/kernel/cpu/sh2/smp-j2.c b/arch/sh/kernel/cpu/sh2/smp-j2.c
new file mode 100644
index 000000000..d0d5d8145
--- /dev/null
+++ b/arch/sh/kernel/cpu/sh2/smp-j2.c
@@ -0,0 +1,136 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * SMP support for J2 processor
+ *
+ * Copyright (C) 2015-2016 Smart Energy Instruments, Inc.
+ */
+
+#include <linux/smp.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <asm/cmpxchg.h>
+
+DEFINE_PER_CPU(unsigned, j2_ipi_messages);
+
+extern u32 *sh2_cpuid_addr;
+static u32 *j2_ipi_trigger;
+static int j2_ipi_irq;
+
+static irqreturn_t j2_ipi_interrupt_handler(int irq, void *arg)
+{
+ unsigned cpu = hard_smp_processor_id();
+ volatile unsigned *pmsg = &per_cpu(j2_ipi_messages, cpu);
+ unsigned messages, i;
+
+ do messages = *pmsg;
+ while (cmpxchg(pmsg, messages, 0) != messages);
+
+ if (!messages) return IRQ_NONE;
+
+ for (i=0; i<SMP_MSG_NR; i++)
+ if (messages & (1U<<i))
+ smp_message_recv(i);
+
+ return IRQ_HANDLED;
+}
+
+static void j2_smp_setup(void)
+{
+}
+
+static void j2_prepare_cpus(unsigned int max_cpus)
+{
+ struct device_node *np;
+ unsigned i, max = 1;
+
+ np = of_find_compatible_node(NULL, NULL, "jcore,ipi-controller");
+ if (!np)
+ goto out;
+
+ j2_ipi_irq = irq_of_parse_and_map(np, 0);
+ j2_ipi_trigger = of_iomap(np, 0);
+ if (!j2_ipi_irq || !j2_ipi_trigger)
+ goto out;
+
+ np = of_find_compatible_node(NULL, NULL, "jcore,cpuid-mmio");
+ if (!np)
+ goto out;
+
+ sh2_cpuid_addr = of_iomap(np, 0);
+ if (!sh2_cpuid_addr)
+ goto out;
+
+ if (request_irq(j2_ipi_irq, j2_ipi_interrupt_handler, IRQF_PERCPU,
+ "ipi", (void *)j2_ipi_interrupt_handler) != 0)
+ goto out;
+
+ max = max_cpus;
+out:
+ /* Disable any cpus past max_cpus, or all secondaries if we didn't
+ * get the necessary resources to support SMP. */
+ for (i=max; i<NR_CPUS; i++) {
+ set_cpu_possible(i, false);
+ set_cpu_present(i, false);
+ }
+}
+
+static void j2_start_cpu(unsigned int cpu, unsigned long entry_point)
+{
+ struct device_node *np;
+ u32 regs[2];
+ void __iomem *release, *initpc;
+
+ if (!cpu) return;
+
+ np = of_get_cpu_node(cpu, NULL);
+ if (!np) return;
+
+ if (of_property_read_u32_array(np, "cpu-release-addr", regs, 2)) return;
+ release = ioremap(regs[0], sizeof(u32));
+ initpc = ioremap(regs[1], sizeof(u32));
+
+ __raw_writel(entry_point, initpc);
+ __raw_writel(1, release);
+
+ iounmap(initpc);
+ iounmap(release);
+
+ pr_info("J2 SMP: requested start of cpu %u\n", cpu);
+}
+
+static unsigned int j2_smp_processor_id(void)
+{
+ return __raw_readl(sh2_cpuid_addr);
+}
+
+static void j2_send_ipi(unsigned int cpu, unsigned int message)
+{
+ volatile unsigned *pmsg;
+ unsigned old;
+ unsigned long val;
+
+ /* There is only one IPI interrupt shared by all messages, so
+ * we keep a separate interrupt flag per message type in sw. */
+ pmsg = &per_cpu(j2_ipi_messages, cpu);
+ do old = *pmsg;
+ while (cmpxchg(pmsg, old, old|(1U<<message)) != old);
+
+ /* Generate the actual interrupt by writing to CCRn bit 28. */
+ val = __raw_readl(j2_ipi_trigger + cpu);
+ __raw_writel(val | (1U<<28), j2_ipi_trigger + cpu);
+}
+
+static struct plat_smp_ops j2_smp_ops = {
+ .smp_setup = j2_smp_setup,
+ .prepare_cpus = j2_prepare_cpus,
+ .start_cpu = j2_start_cpu,
+ .smp_processor_id = j2_smp_processor_id,
+ .send_ipi = j2_send_ipi,
+ .cpu_die = native_cpu_die,
+ .cpu_disable = native_cpu_disable,
+ .play_dead = native_play_dead,
+};
+
+CPU_METHOD_OF_DECLARE(j2_cpu_method, "jcore,spin-table", &j2_smp_ops);