summaryrefslogtreecommitdiffstats
path: root/arch/loongarch/include/asm/cpu.h
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /arch/loongarch/include/asm/cpu.h
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/loongarch/include/asm/cpu.h')
-rw-r--r--arch/loongarch/include/asm/cpu.h131
1 files changed, 131 insertions, 0 deletions
diff --git a/arch/loongarch/include/asm/cpu.h b/arch/loongarch/include/asm/cpu.h
new file mode 100644
index 0000000000..48b9f7168b
--- /dev/null
+++ b/arch/loongarch/include/asm/cpu.h
@@ -0,0 +1,131 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * cpu.h: Values of the PRID register used to match up
+ * various LoongArch CPU types.
+ *
+ * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
+ */
+#ifndef _ASM_CPU_H
+#define _ASM_CPU_H
+
+/*
+ * As described in LoongArch specs from Loongson Technology, the PRID register
+ * (CPUCFG.00) has the following layout:
+ *
+ * +---------------+----------------+------------+--------------------+
+ * | Reserved | Company ID | Series ID | Product ID |
+ * +---------------+----------------+------------+--------------------+
+ * 31 24 23 16 15 12 11 0
+ */
+
+/*
+ * Assigned Company values for bits 23:16 of the PRID register.
+ */
+
+#define PRID_COMP_MASK 0xff0000
+
+#define PRID_COMP_LOONGSON 0x140000
+
+/*
+ * Assigned Series ID values for bits 15:12 of the PRID register. In order
+ * to detect a certain CPU type exactly eventually additional registers may
+ * need to be examined.
+ */
+
+#define PRID_SERIES_MASK 0xf000
+
+#define PRID_SERIES_LA132 0x8000 /* Loongson 32bit */
+#define PRID_SERIES_LA264 0xa000 /* Loongson 64bit, 2-issue */
+#define PRID_SERIES_LA364 0xb000 /* Loongson 64bit, 3-issue */
+#define PRID_SERIES_LA464 0xc000 /* Loongson 64bit, 4-issue */
+#define PRID_SERIES_LA664 0xd000 /* Loongson 64bit, 6-issue */
+
+/*
+ * Particular Product ID values for bits 11:0 of the PRID register.
+ */
+
+#define PRID_PRODUCT_MASK 0x0fff
+
+#if !defined(__ASSEMBLY__)
+
+enum cpu_type_enum {
+ CPU_UNKNOWN,
+ CPU_LOONGSON32,
+ CPU_LOONGSON64,
+ CPU_LAST
+};
+
+#endif /* !__ASSEMBLY */
+
+/*
+ * ISA Level encodings
+ *
+ */
+
+#define LOONGARCH_CPU_ISA_LA32R 0x00000001
+#define LOONGARCH_CPU_ISA_LA32S 0x00000002
+#define LOONGARCH_CPU_ISA_LA64 0x00000004
+
+#define LOONGARCH_CPU_ISA_32BIT (LOONGARCH_CPU_ISA_LA32R | LOONGARCH_CPU_ISA_LA32S)
+#define LOONGARCH_CPU_ISA_64BIT LOONGARCH_CPU_ISA_LA64
+
+/*
+ * CPU Option encodings
+ */
+#define CPU_FEATURE_CPUCFG 0 /* CPU has CPUCFG */
+#define CPU_FEATURE_LAM 1 /* CPU has Atomic instructions */
+#define CPU_FEATURE_UAL 2 /* CPU supports unaligned access */
+#define CPU_FEATURE_FPU 3 /* CPU has FPU */
+#define CPU_FEATURE_LSX 4 /* CPU has LSX (128-bit SIMD) */
+#define CPU_FEATURE_LASX 5 /* CPU has LASX (256-bit SIMD) */
+#define CPU_FEATURE_CRC32 6 /* CPU has CRC32 instructions */
+#define CPU_FEATURE_COMPLEX 7 /* CPU has Complex instructions */
+#define CPU_FEATURE_CRYPTO 8 /* CPU has Crypto instructions */
+#define CPU_FEATURE_LVZ 9 /* CPU has Virtualization extension */
+#define CPU_FEATURE_LBT_X86 10 /* CPU has X86 Binary Translation */
+#define CPU_FEATURE_LBT_ARM 11 /* CPU has ARM Binary Translation */
+#define CPU_FEATURE_LBT_MIPS 12 /* CPU has MIPS Binary Translation */
+#define CPU_FEATURE_TLB 13 /* CPU has TLB */
+#define CPU_FEATURE_CSR 14 /* CPU has CSR */
+#define CPU_FEATURE_WATCH 15 /* CPU has watchpoint registers */
+#define CPU_FEATURE_VINT 16 /* CPU has vectored interrupts */
+#define CPU_FEATURE_CSRIPI 17 /* CPU has CSR-IPI */
+#define CPU_FEATURE_EXTIOI 18 /* CPU has EXT-IOI */
+#define CPU_FEATURE_PREFETCH 19 /* CPU has prefetch instructions */
+#define CPU_FEATURE_PMP 20 /* CPU has perfermance counter */
+#define CPU_FEATURE_SCALEFREQ 21 /* CPU supports cpufreq scaling */
+#define CPU_FEATURE_FLATMODE 22 /* CPU has flat mode */
+#define CPU_FEATURE_EIODECODE 23 /* CPU has EXTIOI interrupt pin decode mode */
+#define CPU_FEATURE_GUESTID 24 /* CPU has GuestID feature */
+#define CPU_FEATURE_HYPERVISOR 25 /* CPU has hypervisor (running in VM) */
+#define CPU_FEATURE_PTW 26 /* CPU has hardware page table walker */
+
+#define LOONGARCH_CPU_CPUCFG BIT_ULL(CPU_FEATURE_CPUCFG)
+#define LOONGARCH_CPU_LAM BIT_ULL(CPU_FEATURE_LAM)
+#define LOONGARCH_CPU_UAL BIT_ULL(CPU_FEATURE_UAL)
+#define LOONGARCH_CPU_FPU BIT_ULL(CPU_FEATURE_FPU)
+#define LOONGARCH_CPU_LSX BIT_ULL(CPU_FEATURE_LSX)
+#define LOONGARCH_CPU_LASX BIT_ULL(CPU_FEATURE_LASX)
+#define LOONGARCH_CPU_CRC32 BIT_ULL(CPU_FEATURE_CRC32)
+#define LOONGARCH_CPU_COMPLEX BIT_ULL(CPU_FEATURE_COMPLEX)
+#define LOONGARCH_CPU_CRYPTO BIT_ULL(CPU_FEATURE_CRYPTO)
+#define LOONGARCH_CPU_LVZ BIT_ULL(CPU_FEATURE_LVZ)
+#define LOONGARCH_CPU_LBT_X86 BIT_ULL(CPU_FEATURE_LBT_X86)
+#define LOONGARCH_CPU_LBT_ARM BIT_ULL(CPU_FEATURE_LBT_ARM)
+#define LOONGARCH_CPU_LBT_MIPS BIT_ULL(CPU_FEATURE_LBT_MIPS)
+#define LOONGARCH_CPU_TLB BIT_ULL(CPU_FEATURE_TLB)
+#define LOONGARCH_CPU_CSR BIT_ULL(CPU_FEATURE_CSR)
+#define LOONGARCH_CPU_WATCH BIT_ULL(CPU_FEATURE_WATCH)
+#define LOONGARCH_CPU_VINT BIT_ULL(CPU_FEATURE_VINT)
+#define LOONGARCH_CPU_CSRIPI BIT_ULL(CPU_FEATURE_CSRIPI)
+#define LOONGARCH_CPU_EXTIOI BIT_ULL(CPU_FEATURE_EXTIOI)
+#define LOONGARCH_CPU_PREFETCH BIT_ULL(CPU_FEATURE_PREFETCH)
+#define LOONGARCH_CPU_PMP BIT_ULL(CPU_FEATURE_PMP)
+#define LOONGARCH_CPU_SCALEFREQ BIT_ULL(CPU_FEATURE_SCALEFREQ)
+#define LOONGARCH_CPU_FLATMODE BIT_ULL(CPU_FEATURE_FLATMODE)
+#define LOONGARCH_CPU_EIODECODE BIT_ULL(CPU_FEATURE_EIODECODE)
+#define LOONGARCH_CPU_GUESTID BIT_ULL(CPU_FEATURE_GUESTID)
+#define LOONGARCH_CPU_HYPERVISOR BIT_ULL(CPU_FEATURE_HYPERVISOR)
+#define LOONGARCH_CPU_PTW BIT_ULL(CPU_FEATURE_PTW)
+
+#endif /* _ASM_CPU_H */