arch/arm/include/asm/cputype.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __ASM_ARM_CPUTYPE_H
   3 #define __ASM_ARM_CPUTYPE_H
   4
   5 #define CPUID_ID        0
   6 #define CPUID_CACHETYPE 1
   7 #define CPUID_TCM       2
   8 #define CPUID_TLBTYPE   3
   9 #define CPUID_MPUIR     4
  10 #define CPUID_MPIDR     5
  11 #define CPUID_REVIDR    6
  12
  13 #ifdef CONFIG_CPU_V7M
  14 #define CPUID_EXT_PFR0  0x40
  15 #define CPUID_EXT_PFR1  0x44
  16 #define CPUID_EXT_DFR0  0x48
  17 #define CPUID_EXT_AFR0  0x4c
  18 #define CPUID_EXT_MMFR0 0x50
  19 #define CPUID_EXT_MMFR1 0x54
  20 #define CPUID_EXT_MMFR2 0x58
  21 #define CPUID_EXT_MMFR3 0x5c
  22 #define CPUID_EXT_ISAR0 0x60
  23 #define CPUID_EXT_ISAR1 0x64
  24 #define CPUID_EXT_ISAR2 0x68
  25 #define CPUID_EXT_ISAR3 0x6c
  26 #define CPUID_EXT_ISAR4 0x70
  27 #define CPUID_EXT_ISAR5 0x74
  28 #else
  29 #define CPUID_EXT_PFR0  "c1, 0"
  30 #define CPUID_EXT_PFR1  "c1, 1"
  31 #define CPUID_EXT_DFR0  "c1, 2"
  32 #define CPUID_EXT_AFR0  "c1, 3"
  33 #define CPUID_EXT_MMFR0 "c1, 4"
  34 #define CPUID_EXT_MMFR1 "c1, 5"
  35 #define CPUID_EXT_MMFR2 "c1, 6"
  36 #define CPUID_EXT_MMFR3 "c1, 7"
  37 #define CPUID_EXT_ISAR0 "c2, 0"
  38 #define CPUID_EXT_ISAR1 "c2, 1"
  39 #define CPUID_EXT_ISAR2 "c2, 2"
  40 #define CPUID_EXT_ISAR3 "c2, 3"
  41 #define CPUID_EXT_ISAR4 "c2, 4"
  42 #define CPUID_EXT_ISAR5 "c2, 5"
  43 #endif
  44
  45 #define MPIDR_SMP_BITMASK (0x3 << 30)
  46 #define MPIDR_SMP_VALUE (0x2 << 30)
  47
  48 #define MPIDR_MT_BITMASK (0x1 << 24)
  49
  50 #define MPIDR_HWID_BITMASK 0xFFFFFF
  51
  52 #define MPIDR_INVALID (~MPIDR_HWID_BITMASK)
  53
  54 #define MPIDR_LEVEL_BITS 8
  55 #define MPIDR_LEVEL_MASK ((1 << MPIDR_LEVEL_BITS) - 1)
  56 #define MPIDR_LEVEL_SHIFT(level) (MPIDR_LEVEL_BITS * level)
  57
  58 #define MPIDR_AFFINITY_LEVEL(mpidr, level) \
  59         ((mpidr >> (MPIDR_LEVEL_BITS * level)) & MPIDR_LEVEL_MASK)
  60
  61 #define ARM_CPU_IMP_ARM                 0x41
  62 #define ARM_CPU_IMP_BRCM                0x42
  63 #define ARM_CPU_IMP_DEC                 0x44
  64 #define ARM_CPU_IMP_INTEL               0x69
  65
  66 /* ARM implemented processors */
  67 #define ARM_CPU_PART_ARM1136            0x4100b360
  68 #define ARM_CPU_PART_ARM1156            0x4100b560
  69 #define ARM_CPU_PART_ARM1176            0x4100b760
  70 #define ARM_CPU_PART_ARM11MPCORE        0x4100b020
  71 #define ARM_CPU_PART_CORTEX_A8          0x4100c080
  72 #define ARM_CPU_PART_CORTEX_A9          0x4100c090
  73 #define ARM_CPU_PART_CORTEX_A5          0x4100c050
  74 #define ARM_CPU_PART_CORTEX_A7          0x4100c070
  75 #define ARM_CPU_PART_CORTEX_A12         0x4100c0d0
  76 #define ARM_CPU_PART_CORTEX_A17         0x4100c0e0
  77 #define ARM_CPU_PART_CORTEX_A15         0x4100c0f0
  78 #define ARM_CPU_PART_CORTEX_A53         0x4100d030
  79 #define ARM_CPU_PART_CORTEX_A57         0x4100d070
  80 #define ARM_CPU_PART_CORTEX_A72         0x4100d080
  81 #define ARM_CPU_PART_CORTEX_A73         0x4100d090
  82 #define ARM_CPU_PART_CORTEX_A75         0x4100d0a0
  83 #define ARM_CPU_PART_MASK               0xff00fff0
  84
  85 /* Broadcom implemented processors */
  86 #define ARM_CPU_PART_BRAHMA_B15         0x420000f0
  87 #define ARM_CPU_PART_BRAHMA_B53         0x42001000
  88
  89 /* DEC implemented cores */
  90 #define ARM_CPU_PART_SA1100             0x4400a110
  91
  92 /* Intel implemented cores */
  93 #define ARM_CPU_PART_SA1110             0x6900b110
  94 #define ARM_CPU_REV_SA1110_A0           0
  95 #define ARM_CPU_REV_SA1110_B0           4
  96 #define ARM_CPU_REV_SA1110_B1           5
  97 #define ARM_CPU_REV_SA1110_B2           6
  98 #define ARM_CPU_REV_SA1110_B4           8
  99
 100 #define ARM_CPU_XSCALE_ARCH_MASK        0xe000
 101 #define ARM_CPU_XSCALE_ARCH_V1          0x2000
 102 #define ARM_CPU_XSCALE_ARCH_V2          0x4000
 103 #define ARM_CPU_XSCALE_ARCH_V3          0x6000
 104
 105 /* Qualcomm implemented cores */
 106 #define ARM_CPU_PART_SCORPION           0x510002d0
 107
 108 #ifndef __ASSEMBLY__
 109
 110 #include <linux/stringify.h>
 111 #include <linux/kernel.h>
 112
 113 extern unsigned int processor_id;
 114 struct proc_info_list *lookup_processor(u32 midr);
 115
 116 #ifdef CONFIG_CPU_CP15
 117 #define read_cpuid(reg)                                                 \
 118         ({                                                              \
 119                 unsigned int __val;                                     \
 120                 asm("mrc        p15, 0, %0, c0, c0, " __stringify(reg)  \
 121                     : "=r" (__val)                                      \
 122                     :                                                   \
 123                     : "cc");                                            \
 124                 __val;                                                  \
 125         })
 126
 127 /*
 128  * The memory clobber prevents gcc 4.5 from reordering the mrc before
 129  * any is_smp() tests, which can cause undefined instruction aborts on
 130  * ARM1136 r0 due to the missing extended CP15 registers.
 131  */
 132 #define read_cpuid_ext(ext_reg)                                         \
 133         ({                                                              \
 134                 unsigned int __val;                                     \
 135                 asm("mrc        p15, 0, %0, c0, " ext_reg               \
 136                     : "=r" (__val)                                      \
 137                     :                                                   \
 138                     : "memory");                                        \
 139                 __val;                                                  \
 140         })
 141
 142 #elif defined(CONFIG_CPU_V7M)
 143
 144 #include <asm/io.h>
 145 #include <asm/v7m.h>
 146
 147 #define read_cpuid(reg)                                                 \
 148         ({                                                              \
 149                 WARN_ON_ONCE(1);                                        \
 150                 0;                                                      \
 151         })
 152
 153 static inline unsigned int __attribute_const__ read_cpuid_ext(unsigned offset)
 154 {
 155         return readl(BASEADDR_V7M_SCB + offset);
 156 }
 157
 158 #else /* ifdef CONFIG_CPU_CP15 / elif defined (CONFIG_CPU_V7M) */
 159
 160 /*
 161  * read_cpuid and read_cpuid_ext should only ever be called on machines that
 162  * have cp15 so warn on other usages.
 163  */
 164 #define read_cpuid(reg)                                                 \
 165         ({                                                              \
 166                 WARN_ON_ONCE(1);                                        \
 167                 0;                                                      \
 168         })
 169
 170 #define read_cpuid_ext(reg) read_cpuid(reg)
 171
 172 #endif /* ifdef CONFIG_CPU_CP15 / else */
 173
 174 #ifdef CONFIG_CPU_CP15
 175 /*
 176  * The CPU ID never changes at run time, so we might as well tell the
 177  * compiler that it's constant.  Use this function to read the CPU ID
 178  * rather than directly reading processor_id or read_cpuid() directly.
 179  */
 180 static inline unsigned int __attribute_const__ read_cpuid_id(void)
 181 {
 182         return read_cpuid(CPUID_ID);
 183 }
 184
 185 static inline unsigned int __attribute_const__ read_cpuid_cachetype(void)
 186 {
 187         return read_cpuid(CPUID_CACHETYPE);
 188 }
 189
 190 static inline unsigned int __attribute_const__ read_cpuid_mputype(void)
 191 {
 192         return read_cpuid(CPUID_MPUIR);
 193 }
 194
 195 #elif defined(CONFIG_CPU_V7M)
 196
 197 static inline unsigned int __attribute_const__ read_cpuid_id(void)
 198 {
 199         return readl(BASEADDR_V7M_SCB + V7M_SCB_CPUID);
 200 }
 201
 202 static inline unsigned int __attribute_const__ read_cpuid_cachetype(void)
 203 {
 204         return readl(BASEADDR_V7M_SCB + V7M_SCB_CTR);
 205 }
 206
 207 static inline unsigned int __attribute_const__ read_cpuid_mputype(void)
 208 {
 209         return readl(BASEADDR_V7M_SCB + MPU_TYPE);
 210 }
 211
 212 #else /* ifdef CONFIG_CPU_CP15 / elif defined(CONFIG_CPU_V7M) */
 213
 214 static inline unsigned int __attribute_const__ read_cpuid_id(void)
 215 {
 216         return processor_id;
 217 }
 218
 219 #endif /* ifdef CONFIG_CPU_CP15 / else */
 220
 221 static inline unsigned int __attribute_const__ read_cpuid_implementor(void)
 222 {
 223         return (read_cpuid_id() & 0xFF000000) >> 24;
 224 }
 225
 226 static inline unsigned int __attribute_const__ read_cpuid_revision(void)
 227 {
 228         return read_cpuid_id() & 0x0000000f;
 229 }
 230
 231 /*
 232  * The CPU part number is meaningless without referring to the CPU
 233  * implementer: implementers are free to define their own part numbers
 234  * which are permitted to clash with other implementer part numbers.
 235  */
 236 static inline unsigned int __attribute_const__ read_cpuid_part(void)
 237 {
 238         return read_cpuid_id() & ARM_CPU_PART_MASK;
 239 }
 240
 241 static inline unsigned int __attribute_const__ __deprecated read_cpuid_part_number(void)
 242 {
 243         return read_cpuid_id() & 0xFFF0;
 244 }
 245
 246 static inline unsigned int __attribute_const__ xscale_cpu_arch_version(void)
 247 {
 248         return read_cpuid_id() & ARM_CPU_XSCALE_ARCH_MASK;
 249 }
 250
 251 static inline unsigned int __attribute_const__ read_cpuid_tcmstatus(void)
 252 {
 253         return read_cpuid(CPUID_TCM);
 254 }
 255
 256 static inline unsigned int __attribute_const__ read_cpuid_mpidr(void)
 257 {
 258         return read_cpuid(CPUID_MPIDR);
 259 }
 260
 261 /* StrongARM-11x0 CPUs */
 262 #define cpu_is_sa1100() (read_cpuid_part() == ARM_CPU_PART_SA1100)
 263 #define cpu_is_sa1110() (read_cpuid_part() == ARM_CPU_PART_SA1110)
 264
 265 /*
 266  * Intel's XScale3 core supports some v6 features (supersections, L2)
 267  * but advertises itself as v5 as it does not support the v6 ISA.  For
 268  * this reason, we need a way to explicitly test for this type of CPU.
 269  */
 270 #ifndef CONFIG_CPU_XSC3
 271 #define cpu_is_xsc3()   0
 272 #else
 273 static inline int cpu_is_xsc3(void)
 274 {
 275         unsigned int id;
 276         id = read_cpuid_id() & 0xffffe000;
 277         /* It covers both Intel ID and Marvell ID */
 278         if ((id == 0x69056000) || (id == 0x56056000))
 279                 return 1;
 280
 281         return 0;
 282 }
 283 #endif
 284
 285 #if !defined(CONFIG_CPU_XSCALE) && !defined(CONFIG_CPU_XSC3) && \
 286     !defined(CONFIG_CPU_MOHAWK)
 287 #define cpu_is_xscale_family() 0
 288 #else
 289 static inline int cpu_is_xscale_family(void)
 290 {
 291         unsigned int id;
 292         id = read_cpuid_id() & 0xffffe000;
 293
 294         switch (id) {
 295         case 0x69052000: /* Intel XScale 1 */
 296         case 0x69054000: /* Intel XScale 2 */
 297         case 0x69056000: /* Intel XScale 3 */
 298         case 0x56056000: /* Marvell XScale 3 */
 299         case 0x56158000: /* Marvell Mohawk */
 300                 return 1;
 301         }
 302
 303         return 0;
 304 }
 305 #endif
 306
 307 /*
 308  * Marvell's PJ4 and PJ4B cores are based on V7 version,
 309  * but require a specical sequence for enabling coprocessors.
 310  * For this reason, we need a way to distinguish them.
 311  */
 312 #if defined(CONFIG_CPU_PJ4) || defined(CONFIG_CPU_PJ4B)
 313 static inline int cpu_is_pj4(void)
 314 {
 315         unsigned int id;
 316
 317         id = read_cpuid_id();
 318         if ((id & 0xff0fff00) == 0x560f5800)
 319                 return 1;
 320
 321         return 0;
 322 }
 323 #else
 324 #define cpu_is_pj4()    0
 325 #endif
 326
 327 static inline int __attribute_const__ cpuid_feature_extract_field(u32 features,
 328                                                                   int field)
 329 {
 330         int feature = (features >> field) & 15;
 331
 332         /* feature registers are signed values */
 333         if (feature > 7)
 334                 feature -= 16;
 335
 336         return feature;
 337 }
 338
 339 #define cpuid_feature_extract(reg, field) \
 340         cpuid_feature_extract_field(read_cpuid_ext(reg), field)
 341
 342 #endif /* __ASSEMBLY__ */
 343
 344 #endif