1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * cpu.h: Values of the PRID register used to match up 4 * various LoongArch CPU types. 5 * 6 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited 7 */ 8 #ifndef _ASM_CPU_H 9 #define _ASM_CPU_H 10 11 /* 12 * As described in LoongArch specs from Loongson Technology, the PRID register 13 * (CPUCFG.00) has the following layout: 14 * 15 * +---------------+----------------+------------+--------------------+ 16 * | Reserved | Company ID | Series ID | Product ID | 17 * +---------------+----------------+------------+--------------------+ 18 * 31 24 23 16 15 12 11 0 19 */ 20 21 /* 22 * Assigned Company values for bits 23:16 of the PRID register. 23 */ 24 25 #define PRID_COMP_MASK 0xff0000 26 27 #define PRID_COMP_LOONGSON 0x140000 28 29 /* 30 * Assigned Series ID values for bits 15:12 of the PRID register. In order 31 * to detect a certain CPU type exactly eventually additional registers may 32 * need to be examined. 33 */ 34 35 #define PRID_SERIES_MASK 0xf000 36 37 #define PRID_SERIES_LA132 0x8000 /* Loongson 32bit */ 38 #define PRID_SERIES_LA264 0xa000 /* Loongson 64bit, 2-issue */ 39 #define PRID_SERIES_LA364 0xb000 /* Loongson 64bit, 3-issue */ 40 #define PRID_SERIES_LA464 0xc000 /* Loongson 64bit, 4-issue */ 41 #define PRID_SERIES_LA664 0xd000 /* Loongson 64bit, 6-issue */ 42 43 /* 44 * Particular Product ID values for bits 11:0 of the PRID register. 45 */ 46 47 #define PRID_PRODUCT_MASK 0x0fff 48 49 #if !defined(__ASSEMBLER__) 50 51 enum cpu_type_enum { 52 CPU_UNKNOWN, 53 CPU_LOONGSON32, 54 CPU_LOONGSON64, 55 CPU_LAST 56 }; 57 id_to_core_name(unsigned int id)58static inline char *id_to_core_name(unsigned int id) 59 { 60 if ((id & PRID_COMP_MASK) != PRID_COMP_LOONGSON) 61 return "Unknown"; 62 63 switch (id & PRID_SERIES_MASK) { 64 case PRID_SERIES_LA132: 65 return "LA132"; 66 case PRID_SERIES_LA264: 67 return "LA264"; 68 case PRID_SERIES_LA364: 69 return "LA364"; 70 case PRID_SERIES_LA464: 71 return "LA464"; 72 case PRID_SERIES_LA664: 73 return "LA664"; 74 default: 75 return "Unknown"; 76 } 77 } 78 79 #endif /* !__ASSEMBLER__ */ 80 81 /* 82 * ISA Level encodings 83 * 84 */ 85 86 #define LOONGARCH_CPU_ISA_LA32R 0x00000001 87 #define LOONGARCH_CPU_ISA_LA32S 0x00000002 88 #define LOONGARCH_CPU_ISA_LA64 0x00000004 89 90 #define LOONGARCH_CPU_ISA_32BIT (LOONGARCH_CPU_ISA_LA32R | LOONGARCH_CPU_ISA_LA32S) 91 #define LOONGARCH_CPU_ISA_64BIT LOONGARCH_CPU_ISA_LA64 92 93 /* 94 * CPU Option encodings 95 */ 96 #define CPU_FEATURE_CPUCFG 0 /* CPU has CPUCFG */ 97 #define CPU_FEATURE_LAM 1 /* CPU has Atomic instructions */ 98 #define CPU_FEATURE_UAL 2 /* CPU supports unaligned access */ 99 #define CPU_FEATURE_FPU 3 /* CPU has FPU */ 100 #define CPU_FEATURE_LSX 4 /* CPU has LSX (128-bit SIMD) */ 101 #define CPU_FEATURE_LASX 5 /* CPU has LASX (256-bit SIMD) */ 102 #define CPU_FEATURE_CRC32 6 /* CPU has CRC32 instructions */ 103 #define CPU_FEATURE_COMPLEX 7 /* CPU has Complex instructions */ 104 #define CPU_FEATURE_CRYPTO 8 /* CPU has Crypto instructions */ 105 #define CPU_FEATURE_LVZ 9 /* CPU has Virtualization extension */ 106 #define CPU_FEATURE_LBT_X86 10 /* CPU has X86 Binary Translation */ 107 #define CPU_FEATURE_LBT_ARM 11 /* CPU has ARM Binary Translation */ 108 #define CPU_FEATURE_LBT_MIPS 12 /* CPU has MIPS Binary Translation */ 109 #define CPU_FEATURE_TLB 13 /* CPU has TLB */ 110 #define CPU_FEATURE_CSR 14 /* CPU has CSR */ 111 #define CPU_FEATURE_IOCSR 15 /* CPU has IOCSR */ 112 #define CPU_FEATURE_WATCH 16 /* CPU has watchpoint registers */ 113 #define CPU_FEATURE_VINT 17 /* CPU has vectored interrupts */ 114 #define CPU_FEATURE_CSRIPI 18 /* CPU has CSR-IPI */ 115 #define CPU_FEATURE_EXTIOI 19 /* CPU has EXT-IOI */ 116 #define CPU_FEATURE_PREFETCH 20 /* CPU has prefetch instructions */ 117 #define CPU_FEATURE_PMP 21 /* CPU has perfermance counter */ 118 #define CPU_FEATURE_SCALEFREQ 22 /* CPU supports cpufreq scaling */ 119 #define CPU_FEATURE_FLATMODE 23 /* CPU has flat mode */ 120 #define CPU_FEATURE_EIODECODE 24 /* CPU has EXTIOI interrupt pin decode mode */ 121 #define CPU_FEATURE_GUESTID 25 /* CPU has GuestID feature */ 122 #define CPU_FEATURE_HYPERVISOR 26 /* CPU has hypervisor (running in VM) */ 123 #define CPU_FEATURE_PTW 27 /* CPU has hardware page table walker */ 124 #define CPU_FEATURE_LSPW 28 /* CPU has LSPW (lddir/ldpte instructions) */ 125 #define CPU_FEATURE_MSGINT 29 /* CPU has MSG interrupt */ 126 #define CPU_FEATURE_AVECINT 30 /* CPU has AVEC interrupt */ 127 #define CPU_FEATURE_REDIRECTINT 31 /* CPU has interrupt remapping */ 128 129 #define LOONGARCH_CPU_CPUCFG BIT_ULL(CPU_FEATURE_CPUCFG) 130 #define LOONGARCH_CPU_LAM BIT_ULL(CPU_FEATURE_LAM) 131 #define LOONGARCH_CPU_UAL BIT_ULL(CPU_FEATURE_UAL) 132 #define LOONGARCH_CPU_FPU BIT_ULL(CPU_FEATURE_FPU) 133 #define LOONGARCH_CPU_LSX BIT_ULL(CPU_FEATURE_LSX) 134 #define LOONGARCH_CPU_LASX BIT_ULL(CPU_FEATURE_LASX) 135 #define LOONGARCH_CPU_CRC32 BIT_ULL(CPU_FEATURE_CRC32) 136 #define LOONGARCH_CPU_COMPLEX BIT_ULL(CPU_FEATURE_COMPLEX) 137 #define LOONGARCH_CPU_CRYPTO BIT_ULL(CPU_FEATURE_CRYPTO) 138 #define LOONGARCH_CPU_LVZ BIT_ULL(CPU_FEATURE_LVZ) 139 #define LOONGARCH_CPU_LBT_X86 BIT_ULL(CPU_FEATURE_LBT_X86) 140 #define LOONGARCH_CPU_LBT_ARM BIT_ULL(CPU_FEATURE_LBT_ARM) 141 #define LOONGARCH_CPU_LBT_MIPS BIT_ULL(CPU_FEATURE_LBT_MIPS) 142 #define LOONGARCH_CPU_TLB BIT_ULL(CPU_FEATURE_TLB) 143 #define LOONGARCH_CPU_IOCSR BIT_ULL(CPU_FEATURE_IOCSR) 144 #define LOONGARCH_CPU_CSR BIT_ULL(CPU_FEATURE_CSR) 145 #define LOONGARCH_CPU_WATCH BIT_ULL(CPU_FEATURE_WATCH) 146 #define LOONGARCH_CPU_VINT BIT_ULL(CPU_FEATURE_VINT) 147 #define LOONGARCH_CPU_CSRIPI BIT_ULL(CPU_FEATURE_CSRIPI) 148 #define LOONGARCH_CPU_EXTIOI BIT_ULL(CPU_FEATURE_EXTIOI) 149 #define LOONGARCH_CPU_PREFETCH BIT_ULL(CPU_FEATURE_PREFETCH) 150 #define LOONGARCH_CPU_PMP BIT_ULL(CPU_FEATURE_PMP) 151 #define LOONGARCH_CPU_SCALEFREQ BIT_ULL(CPU_FEATURE_SCALEFREQ) 152 #define LOONGARCH_CPU_FLATMODE BIT_ULL(CPU_FEATURE_FLATMODE) 153 #define LOONGARCH_CPU_EIODECODE BIT_ULL(CPU_FEATURE_EIODECODE) 154 #define LOONGARCH_CPU_GUESTID BIT_ULL(CPU_FEATURE_GUESTID) 155 #define LOONGARCH_CPU_HYPERVISOR BIT_ULL(CPU_FEATURE_HYPERVISOR) 156 #define LOONGARCH_CPU_PTW BIT_ULL(CPU_FEATURE_PTW) 157 #define LOONGARCH_CPU_LSPW BIT_ULL(CPU_FEATURE_LSPW) 158 #define LOONGARCH_CPU_MSGINT BIT_ULL(CPU_FEATURE_MSGINT) 159 #define LOONGARCH_CPU_AVECINT BIT_ULL(CPU_FEATURE_AVECINT) 160 #define LOONGARCH_CPU_REDIRECTINT BIT_ULL(CPU_FEATURE_REDIRECTINT) 161 162 #endif /* _ASM_CPU_H */ 163