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; 114 115 #ifdef CONFIG_CPU_CP15 116 #define read_cpuid(reg) \ 117 ({ \ 118 unsigned int __val; \ 119 asm("mrc p15, 0, %0, c0, c0, " __stringify(reg) \ 120 : "=r" (__val) \ 121 : \ 122 : "cc"); \ 123 __val; \ 124 }) 125 126 /* 127 * The memory clobber prevents gcc 4.5 from reordering the mrc before 128 * any is_smp() tests, which can cause undefined instruction aborts on 129 * ARM1136 r0 due to the missing extended CP15 registers. 130 */ 131 #define read_cpuid_ext(ext_reg) \ 132 ({ \ 133 unsigned int __val; \ 134 asm("mrc p15, 0, %0, c0, " ext_reg \ 135 : "=r" (__val) \ 136 : \ 137 : "memory"); \ 138 __val; \ 139 }) 140 141 #elif defined(CONFIG_CPU_V7M) 142 143 #include <asm/io.h> 144 #include <asm/v7m.h> 145 146 #define read_cpuid(reg) \ 147 ({ \ 148 WARN_ON_ONCE(1); \ 149 0; \ 150 }) 151 152 static inline unsigned int __attribute_const__ read_cpuid_ext(unsigned offset) 153 { 154 return readl(BASEADDR_V7M_SCB + offset); 155 } 156 157 #else /* ifdef CONFIG_CPU_CP15 / elif defined (CONFIG_CPU_V7M) */ 158 159 /* 160 * read_cpuid and read_cpuid_ext should only ever be called on machines that 161 * have cp15 so warn on other usages. 162 */ 163 #define read_cpuid(reg) \ 164 ({ \ 165 WARN_ON_ONCE(1); \ 166 0; \ 167 }) 168 169 #define read_cpuid_ext(reg) read_cpuid(reg) 170 171 #endif /* ifdef CONFIG_CPU_CP15 / else */ 172 173 #ifdef CONFIG_CPU_CP15 174 /* 175 * The CPU ID never changes at run time, so we might as well tell the 176 * compiler that it's constant. Use this function to read the CPU ID 177 * rather than directly reading processor_id or read_cpuid() directly. 178 */ 179 static inline unsigned int __attribute_const__ read_cpuid_id(void) 180 { 181 return read_cpuid(CPUID_ID); 182 } 183 184 static inline unsigned int __attribute_const__ read_cpuid_cachetype(void) 185 { 186 return read_cpuid(CPUID_CACHETYPE); 187 } 188 189 static inline unsigned int __attribute_const__ read_cpuid_mputype(void) 190 { 191 return read_cpuid(CPUID_MPUIR); 192 } 193 194 #elif defined(CONFIG_CPU_V7M) 195 196 static inline unsigned int __attribute_const__ read_cpuid_id(void) 197 { 198 return readl(BASEADDR_V7M_SCB + V7M_SCB_CPUID); 199 } 200 201 static inline unsigned int __attribute_const__ read_cpuid_cachetype(void) 202 { 203 return readl(BASEADDR_V7M_SCB + V7M_SCB_CTR); 204 } 205 206 static inline unsigned int __attribute_const__ read_cpuid_mputype(void) 207 { 208 return readl(BASEADDR_V7M_SCB + MPU_TYPE); 209 } 210 211 #else /* ifdef CONFIG_CPU_CP15 / elif defined(CONFIG_CPU_V7M) */ 212 213 static inline unsigned int __attribute_const__ read_cpuid_id(void) 214 { 215 return processor_id; 216 } 217 218 #endif /* ifdef CONFIG_CPU_CP15 / else */ 219 220 static inline unsigned int __attribute_const__ read_cpuid_implementor(void) 221 { 222 return (read_cpuid_id() & 0xFF000000) >> 24; 223 } 224 225 static inline unsigned int __attribute_const__ read_cpuid_revision(void) 226 { 227 return read_cpuid_id() & 0x0000000f; 228 } 229 230 /* 231 * The CPU part number is meaningless without referring to the CPU 232 * implementer: implementers are free to define their own part numbers 233 * which are permitted to clash with other implementer part numbers. 234 */ 235 static inline unsigned int __attribute_const__ read_cpuid_part(void) 236 { 237 return read_cpuid_id() & ARM_CPU_PART_MASK; 238 } 239 240 static inline unsigned int __attribute_const__ __deprecated read_cpuid_part_number(void) 241 { 242 return read_cpuid_id() & 0xFFF0; 243 } 244 245 static inline unsigned int __attribute_const__ xscale_cpu_arch_version(void) 246 { 247 return read_cpuid_id() & ARM_CPU_XSCALE_ARCH_MASK; 248 } 249 250 static inline unsigned int __attribute_const__ read_cpuid_tcmstatus(void) 251 { 252 return read_cpuid(CPUID_TCM); 253 } 254 255 static inline unsigned int __attribute_const__ read_cpuid_mpidr(void) 256 { 257 return read_cpuid(CPUID_MPIDR); 258 } 259 260 /* StrongARM-11x0 CPUs */ 261 #define cpu_is_sa1100() (read_cpuid_part() == ARM_CPU_PART_SA1100) 262 #define cpu_is_sa1110() (read_cpuid_part() == ARM_CPU_PART_SA1110) 263 264 /* 265 * Intel's XScale3 core supports some v6 features (supersections, L2) 266 * but advertises itself as v5 as it does not support the v6 ISA. For 267 * this reason, we need a way to explicitly test for this type of CPU. 268 */ 269 #ifndef CONFIG_CPU_XSC3 270 #define cpu_is_xsc3() 0 271 #else 272 static inline int cpu_is_xsc3(void) 273 { 274 unsigned int id; 275 id = read_cpuid_id() & 0xffffe000; 276 /* It covers both Intel ID and Marvell ID */ 277 if ((id == 0x69056000) || (id == 0x56056000)) 278 return 1; 279 280 return 0; 281 } 282 #endif 283 284 #if !defined(CONFIG_CPU_XSCALE) && !defined(CONFIG_CPU_XSC3) && \ 285 !defined(CONFIG_CPU_MOHAWK) 286 #define cpu_is_xscale_family() 0 287 #else 288 static inline int cpu_is_xscale_family(void) 289 { 290 unsigned int id; 291 id = read_cpuid_id() & 0xffffe000; 292 293 switch (id) { 294 case 0x69052000: /* Intel XScale 1 */ 295 case 0x69054000: /* Intel XScale 2 */ 296 case 0x69056000: /* Intel XScale 3 */ 297 case 0x56056000: /* Marvell XScale 3 */ 298 case 0x56158000: /* Marvell Mohawk */ 299 return 1; 300 } 301 302 return 0; 303 } 304 #endif 305 306 /* 307 * Marvell's PJ4 and PJ4B cores are based on V7 version, 308 * but require a specical sequence for enabling coprocessors. 309 * For this reason, we need a way to distinguish them. 310 */ 311 #if defined(CONFIG_CPU_PJ4) || defined(CONFIG_CPU_PJ4B) 312 static inline int cpu_is_pj4(void) 313 { 314 unsigned int id; 315 316 id = read_cpuid_id(); 317 if ((id & 0xff0fff00) == 0x560f5800) 318 return 1; 319 320 return 0; 321 } 322 #else 323 #define cpu_is_pj4() 0 324 #endif 325 326 static inline int __attribute_const__ cpuid_feature_extract_field(u32 features, 327 int field) 328 { 329 int feature = (features >> field) & 15; 330 331 /* feature registers are signed values */ 332 if (feature > 7) 333 feature -= 16; 334 335 return feature; 336 } 337 338 #define cpuid_feature_extract(reg, field) \ 339 cpuid_feature_extract_field(read_cpuid_ext(reg), field) 340 341 #endif /* __ASSEMBLY__ */ 342 343 #endif 344