arch/loongarch/include/asm/cpu.h

   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(__ASSEMBLY__)
  50
  51 enum cpu_type_enum {
  52         CPU_UNKNOWN,
  53         CPU_LOONGSON32,
  54         CPU_LOONGSON64,
  55         CPU_LAST
  56 };
  57
  58 #endif /* !__ASSEMBLY */
  59
  60 /*
  61  * ISA Level encodings
  62  *
  63  */
  64
  65 #define LOONGARCH_CPU_ISA_LA32R 0x00000001
  66 #define LOONGARCH_CPU_ISA_LA32S 0x00000002
  67 #define LOONGARCH_CPU_ISA_LA64  0x00000004
  68
  69 #define LOONGARCH_CPU_ISA_32BIT (LOONGARCH_CPU_ISA_LA32R | LOONGARCH_CPU_ISA_LA32S)
  70 #define LOONGARCH_CPU_ISA_64BIT LOONGARCH_CPU_ISA_LA64
  71
  72 /*
  73  * CPU Option encodings
  74  */
  75 #define CPU_FEATURE_CPUCFG              0       /* CPU has CPUCFG */
  76 #define CPU_FEATURE_LAM                 1       /* CPU has Atomic instructions */
  77 #define CPU_FEATURE_UAL                 2       /* CPU supports unaligned access */
  78 #define CPU_FEATURE_FPU                 3       /* CPU has FPU */
  79 #define CPU_FEATURE_LSX                 4       /* CPU has LSX (128-bit SIMD) */
  80 #define CPU_FEATURE_LASX                5       /* CPU has LASX (256-bit SIMD) */
  81 #define CPU_FEATURE_CRC32               6       /* CPU has CRC32 instructions */
  82 #define CPU_FEATURE_COMPLEX             7       /* CPU has Complex instructions */
  83 #define CPU_FEATURE_CRYPTO              8       /* CPU has Crypto instructions */
  84 #define CPU_FEATURE_LVZ                 9       /* CPU has Virtualization extension */
  85 #define CPU_FEATURE_LBT_X86             10      /* CPU has X86 Binary Translation */
  86 #define CPU_FEATURE_LBT_ARM             11      /* CPU has ARM Binary Translation */
  87 #define CPU_FEATURE_LBT_MIPS            12      /* CPU has MIPS Binary Translation */
  88 #define CPU_FEATURE_TLB                 13      /* CPU has TLB */
  89 #define CPU_FEATURE_CSR                 14      /* CPU has CSR */
  90 #define CPU_FEATURE_WATCH               15      /* CPU has watchpoint registers */
  91 #define CPU_FEATURE_VINT                16      /* CPU has vectored interrupts */
  92 #define CPU_FEATURE_CSRIPI              17      /* CPU has CSR-IPI */
  93 #define CPU_FEATURE_EXTIOI              18      /* CPU has EXT-IOI */
  94 #define CPU_FEATURE_PREFETCH            19      /* CPU has prefetch instructions */
  95 #define CPU_FEATURE_PMP                 20      /* CPU has perfermance counter */
  96 #define CPU_FEATURE_SCALEFREQ           21      /* CPU supports cpufreq scaling */
  97 #define CPU_FEATURE_FLATMODE            22      /* CPU has flat mode */
  98 #define CPU_FEATURE_EIODECODE           23      /* CPU has EXTIOI interrupt pin decode mode */
  99 #define CPU_FEATURE_GUESTID             24      /* CPU has GuestID feature */
 100 #define CPU_FEATURE_HYPERVISOR          25      /* CPU has hypervisor (running in VM) */
 101 #define CPU_FEATURE_PTW                 26      /* CPU has hardware page table walker */
 102
 103 #define LOONGARCH_CPU_CPUCFG            BIT_ULL(CPU_FEATURE_CPUCFG)
 104 #define LOONGARCH_CPU_LAM               BIT_ULL(CPU_FEATURE_LAM)
 105 #define LOONGARCH_CPU_UAL               BIT_ULL(CPU_FEATURE_UAL)
 106 #define LOONGARCH_CPU_FPU               BIT_ULL(CPU_FEATURE_FPU)
 107 #define LOONGARCH_CPU_LSX               BIT_ULL(CPU_FEATURE_LSX)
 108 #define LOONGARCH_CPU_LASX              BIT_ULL(CPU_FEATURE_LASX)
 109 #define LOONGARCH_CPU_CRC32             BIT_ULL(CPU_FEATURE_CRC32)
 110 #define LOONGARCH_CPU_COMPLEX           BIT_ULL(CPU_FEATURE_COMPLEX)
 111 #define LOONGARCH_CPU_CRYPTO            BIT_ULL(CPU_FEATURE_CRYPTO)
 112 #define LOONGARCH_CPU_LVZ               BIT_ULL(CPU_FEATURE_LVZ)
 113 #define LOONGARCH_CPU_LBT_X86           BIT_ULL(CPU_FEATURE_LBT_X86)
 114 #define LOONGARCH_CPU_LBT_ARM           BIT_ULL(CPU_FEATURE_LBT_ARM)
 115 #define LOONGARCH_CPU_LBT_MIPS          BIT_ULL(CPU_FEATURE_LBT_MIPS)
 116 #define LOONGARCH_CPU_TLB               BIT_ULL(CPU_FEATURE_TLB)
 117 #define LOONGARCH_CPU_CSR               BIT_ULL(CPU_FEATURE_CSR)
 118 #define LOONGARCH_CPU_WATCH             BIT_ULL(CPU_FEATURE_WATCH)
 119 #define LOONGARCH_CPU_VINT              BIT_ULL(CPU_FEATURE_VINT)
 120 #define LOONGARCH_CPU_CSRIPI            BIT_ULL(CPU_FEATURE_CSRIPI)
 121 #define LOONGARCH_CPU_EXTIOI            BIT_ULL(CPU_FEATURE_EXTIOI)
 122 #define LOONGARCH_CPU_PREFETCH          BIT_ULL(CPU_FEATURE_PREFETCH)
 123 #define LOONGARCH_CPU_PMP               BIT_ULL(CPU_FEATURE_PMP)
 124 #define LOONGARCH_CPU_SCALEFREQ         BIT_ULL(CPU_FEATURE_SCALEFREQ)
 125 #define LOONGARCH_CPU_FLATMODE          BIT_ULL(CPU_FEATURE_FLATMODE)
 126 #define LOONGARCH_CPU_EIODECODE         BIT_ULL(CPU_FEATURE_EIODECODE)
 127 #define LOONGARCH_CPU_GUESTID           BIT_ULL(CPU_FEATURE_GUESTID)
 128 #define LOONGARCH_CPU_HYPERVISOR        BIT_ULL(CPU_FEATURE_HYPERVISOR)
 129 #define LOONGARCH_CPU_PTW               BIT_ULL(CPU_FEATURE_PTW)
 130
 131 #endif /* _ASM_CPU_H */