arch/arm64/include/asm/sysreg.h

   1 /*
   2  * Macros for accessing system registers with older binutils.
   3  *
   4  * Copyright (C) 2014 ARM Ltd.
   5  * Author: Catalin Marinas <catalin.marinas@arm.com>
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #ifndef __ASM_SYSREG_H
  21 #define __ASM_SYSREG_H
  22
  23 #include <asm/opcodes.h>
  24
  25 /*
  26  * ARMv8 ARM reserves the following encoding for system registers:
  27  * (Ref: ARMv8 ARM, Section: "System instruction class encoding overview",
  28  *  C5.2, version:ARM DDI 0487A.f)
  29  *      [20-19] : Op0
  30  *      [18-16] : Op1
  31  *      [15-12] : CRn
  32  *      [11-8]  : CRm
  33  *      [7-5]   : Op2
  34  */
  35 #define sys_reg(op0, op1, crn, crm, op2) \
  36         ((((op0)&3)<<19)|((op1)<<16)|((crn)<<12)|((crm)<<8)|((op2)<<5))
  37
  38 #define SYS_MIDR_EL1                    sys_reg(3, 0, 0, 0, 0)
  39 #define SYS_MPIDR_EL1                   sys_reg(3, 0, 0, 0, 5)
  40 #define SYS_REVIDR_EL1                  sys_reg(3, 0, 0, 0, 6)
  41
  42 #define SYS_ID_PFR0_EL1                 sys_reg(3, 0, 0, 1, 0)
  43 #define SYS_ID_PFR1_EL1                 sys_reg(3, 0, 0, 1, 1)
  44 #define SYS_ID_DFR0_EL1                 sys_reg(3, 0, 0, 1, 2)
  45 #define SYS_ID_MMFR0_EL1                sys_reg(3, 0, 0, 1, 4)
  46 #define SYS_ID_MMFR1_EL1                sys_reg(3, 0, 0, 1, 5)
  47 #define SYS_ID_MMFR2_EL1                sys_reg(3, 0, 0, 1, 6)
  48 #define SYS_ID_MMFR3_EL1                sys_reg(3, 0, 0, 1, 7)
  49
  50 #define SYS_ID_ISAR0_EL1                sys_reg(3, 0, 0, 2, 0)
  51 #define SYS_ID_ISAR1_EL1                sys_reg(3, 0, 0, 2, 1)
  52 #define SYS_ID_ISAR2_EL1                sys_reg(3, 0, 0, 2, 2)
  53 #define SYS_ID_ISAR3_EL1                sys_reg(3, 0, 0, 2, 3)
  54 #define SYS_ID_ISAR4_EL1                sys_reg(3, 0, 0, 2, 4)
  55 #define SYS_ID_ISAR5_EL1                sys_reg(3, 0, 0, 2, 5)
  56 #define SYS_ID_MMFR4_EL1                sys_reg(3, 0, 0, 2, 6)
  57
  58 #define SYS_MVFR0_EL1                   sys_reg(3, 0, 0, 3, 0)
  59 #define SYS_MVFR1_EL1                   sys_reg(3, 0, 0, 3, 1)
  60 #define SYS_MVFR2_EL1                   sys_reg(3, 0, 0, 3, 2)
  61
  62 #define SYS_ID_AA64PFR0_EL1             sys_reg(3, 0, 0, 4, 0)
  63 #define SYS_ID_AA64PFR1_EL1             sys_reg(3, 0, 0, 4, 1)
  64
  65 #define SYS_ID_AA64DFR0_EL1             sys_reg(3, 0, 0, 5, 0)
  66 #define SYS_ID_AA64DFR1_EL1             sys_reg(3, 0, 0, 5, 1)
  67
  68 #define SYS_ID_AA64ISAR0_EL1            sys_reg(3, 0, 0, 6, 0)
  69 #define SYS_ID_AA64ISAR1_EL1            sys_reg(3, 0, 0, 6, 1)
  70
  71 #define SYS_ID_AA64MMFR0_EL1            sys_reg(3, 0, 0, 7, 0)
  72 #define SYS_ID_AA64MMFR1_EL1            sys_reg(3, 0, 0, 7, 1)
  73
  74 #define SYS_CNTFRQ_EL0                  sys_reg(3, 3, 14, 0, 0)
  75 #define SYS_CTR_EL0                     sys_reg(3, 3, 0, 0, 1)
  76 #define SYS_DCZID_EL0                   sys_reg(3, 3, 0, 0, 7)
  77
  78 #define REG_PSTATE_PAN_IMM              sys_reg(0, 0, 4, 0, 4)
  79
  80 #define SET_PSTATE_PAN(x) __inst_arm(0xd5000000 | REG_PSTATE_PAN_IMM |\
  81                                      (!!x)<<8 | 0x1f)
  82
  83 /* SCTLR_EL1 */
  84 #define SCTLR_EL1_CP15BEN       (0x1 << 5)
  85 #define SCTLR_EL1_SED           (0x1 << 8)
  86 #define SCTLR_EL1_SPAN          (0x1 << 23)
  87
  88
  89 /* id_aa64isar0 */
  90 #define ID_AA64ISAR0_RDM_SHIFT          28
  91 #define ID_AA64ISAR0_ATOMICS_SHIFT      20
  92 #define ID_AA64ISAR0_CRC32_SHIFT        16
  93 #define ID_AA64ISAR0_SHA2_SHIFT         12
  94 #define ID_AA64ISAR0_SHA1_SHIFT         8
  95 #define ID_AA64ISAR0_AES_SHIFT          4
  96
  97 /* id_aa64pfr0 */
  98 #define ID_AA64PFR0_GIC_SHIFT           24
  99 #define ID_AA64PFR0_ASIMD_SHIFT         20
 100 #define ID_AA64PFR0_FP_SHIFT            16
 101 #define ID_AA64PFR0_EL3_SHIFT           12
 102 #define ID_AA64PFR0_EL2_SHIFT           8
 103 #define ID_AA64PFR0_EL1_SHIFT           4
 104 #define ID_AA64PFR0_EL0_SHIFT           0
 105
 106 #define ID_AA64PFR0_FP_NI               0xf
 107 #define ID_AA64PFR0_FP_SUPPORTED        0x0
 108 #define ID_AA64PFR0_ASIMD_NI            0xf
 109 #define ID_AA64PFR0_ASIMD_SUPPORTED     0x0
 110 #define ID_AA64PFR0_EL1_64BIT_ONLY      0x1
 111 #define ID_AA64PFR0_EL0_64BIT_ONLY      0x1
 112 #define ID_AA64PFR0_EL0_32BIT_64BIT     0x2
 113
 114 /* id_aa64mmfr0 */
 115 #define ID_AA64MMFR0_TGRAN4_SHIFT       28
 116 #define ID_AA64MMFR0_TGRAN64_SHIFT      24
 117 #define ID_AA64MMFR0_TGRAN16_SHIFT      20
 118 #define ID_AA64MMFR0_BIGENDEL0_SHIFT    16
 119 #define ID_AA64MMFR0_SNSMEM_SHIFT       12
 120 #define ID_AA64MMFR0_BIGENDEL_SHIFT     8
 121 #define ID_AA64MMFR0_ASID_SHIFT         4
 122 #define ID_AA64MMFR0_PARANGE_SHIFT      0
 123
 124 #define ID_AA64MMFR0_TGRAN4_NI          0xf
 125 #define ID_AA64MMFR0_TGRAN4_SUPPORTED   0x0
 126 #define ID_AA64MMFR0_TGRAN64_NI         0xf
 127 #define ID_AA64MMFR0_TGRAN64_SUPPORTED  0x0
 128 #define ID_AA64MMFR0_TGRAN16_NI         0x0
 129 #define ID_AA64MMFR0_TGRAN16_SUPPORTED  0x1
 130
 131 /* id_aa64mmfr1 */
 132 #define ID_AA64MMFR1_PAN_SHIFT          20
 133 #define ID_AA64MMFR1_LOR_SHIFT          16
 134 #define ID_AA64MMFR1_HPD_SHIFT          12
 135 #define ID_AA64MMFR1_VHE_SHIFT          8
 136 #define ID_AA64MMFR1_VMIDBITS_SHIFT     4
 137 #define ID_AA64MMFR1_HADBS_SHIFT        0
 138
 139 /* id_aa64dfr0 */
 140 #define ID_AA64DFR0_CTX_CMPS_SHIFT      28
 141 #define ID_AA64DFR0_WRPS_SHIFT          20
 142 #define ID_AA64DFR0_BRPS_SHIFT          12
 143 #define ID_AA64DFR0_PMUVER_SHIFT        8
 144 #define ID_AA64DFR0_TRACEVER_SHIFT      4
 145 #define ID_AA64DFR0_DEBUGVER_SHIFT      0
 146
 147 #define ID_ISAR5_RDM_SHIFT              24
 148 #define ID_ISAR5_CRC32_SHIFT            16
 149 #define ID_ISAR5_SHA2_SHIFT             12
 150 #define ID_ISAR5_SHA1_SHIFT             8
 151 #define ID_ISAR5_AES_SHIFT              4
 152 #define ID_ISAR5_SEVL_SHIFT             0
 153
 154 #define MVFR0_FPROUND_SHIFT             28
 155 #define MVFR0_FPSHVEC_SHIFT             24
 156 #define MVFR0_FPSQRT_SHIFT              20
 157 #define MVFR0_FPDIVIDE_SHIFT            16
 158 #define MVFR0_FPTRAP_SHIFT              12
 159 #define MVFR0_FPDP_SHIFT                8
 160 #define MVFR0_FPSP_SHIFT                4
 161 #define MVFR0_SIMD_SHIFT                0
 162
 163 #define MVFR1_SIMDFMAC_SHIFT            28
 164 #define MVFR1_FPHP_SHIFT                24
 165 #define MVFR1_SIMDHP_SHIFT              20
 166 #define MVFR1_SIMDSP_SHIFT              16
 167 #define MVFR1_SIMDINT_SHIFT             12
 168 #define MVFR1_SIMDLS_SHIFT              8
 169 #define MVFR1_FPDNAN_SHIFT              4
 170 #define MVFR1_FPFTZ_SHIFT               0
 171
 172
 173 #define ID_AA64MMFR0_TGRAN4_SHIFT       28
 174 #define ID_AA64MMFR0_TGRAN64_SHIFT      24
 175 #define ID_AA64MMFR0_TGRAN16_SHIFT      20
 176
 177 #define ID_AA64MMFR0_TGRAN4_NI          0xf
 178 #define ID_AA64MMFR0_TGRAN4_SUPPORTED   0x0
 179 #define ID_AA64MMFR0_TGRAN64_NI         0xf
 180 #define ID_AA64MMFR0_TGRAN64_SUPPORTED  0x0
 181 #define ID_AA64MMFR0_TGRAN16_NI         0x0
 182 #define ID_AA64MMFR0_TGRAN16_SUPPORTED  0x1
 183
 184 #if defined(CONFIG_ARM64_4K_PAGES)
 185 #define ID_AA64MMFR0_TGRAN_SHIFT        ID_AA64MMFR0_TGRAN4_SHIFT
 186 #define ID_AA64MMFR0_TGRAN_SUPPORTED    ID_AA64MMFR0_TGRAN4_SUPPORTED
 187 #elif defined(CONFIG_ARM64_16K_PAGES)
 188 #define ID_AA64MMFR0_TGRAN_SHIFT        ID_AA64MMFR0_TGRAN16_SHIFT
 189 #define ID_AA64MMFR0_TGRAN_SUPPORTED    ID_AA64MMFR0_TGRAN16_SUPPORTED
 190 #elif defined(CONFIG_ARM64_64K_PAGES)
 191 #define ID_AA64MMFR0_TGRAN_SHIFT        ID_AA64MMFR0_TGRAN64_SHIFT
 192 #define ID_AA64MMFR0_TGRAN_SUPPORTED    ID_AA64MMFR0_TGRAN64_SUPPORTED
 193 #endif
 194
 195 #ifdef __ASSEMBLY__
 196
 197         .irp    num,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30
 198         .equ    __reg_num_x\num, \num
 199         .endr
 200         .equ    __reg_num_xzr, 31
 201
 202         .macro  mrs_s, rt, sreg
 203         .inst   0xd5200000|(\sreg)|(__reg_num_\rt)
 204         .endm
 205
 206         .macro  msr_s, sreg, rt
 207         .inst   0xd5000000|(\sreg)|(__reg_num_\rt)
 208         .endm
 209
 210 #else
 211
 212 asm(
 213 "       .irp    num,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30\n"
 214 "       .equ    __reg_num_x\\num, \\num\n"
 215 "       .endr\n"
 216 "       .equ    __reg_num_xzr, 31\n"
 217 "\n"
 218 "       .macro  mrs_s, rt, sreg\n"
 219 "       .inst   0xd5200000|(\\sreg)|(__reg_num_\\rt)\n"
 220 "       .endm\n"
 221 "\n"
 222 "       .macro  msr_s, sreg, rt\n"
 223 "       .inst   0xd5000000|(\\sreg)|(__reg_num_\\rt)\n"
 224 "       .endm\n"
 225 );
 226
 227 static inline void config_sctlr_el1(u32 clear, u32 set)
 228 {
 229         u32 val;
 230
 231         asm volatile("mrs %0, sctlr_el1" : "=r" (val));
 232         val &= ~clear;
 233         val |= set;
 234         asm volatile("msr sctlr_el1, %0" : : "r" (val));
 235 }
 236 #endif
 237
 238 #endif  /* __ASM_SYSREG_H */