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