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9cce7a43 CM |
1 | /* |
2 | * Copyright (C) 2012 ARM Ltd. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
15 | */ | |
16 | #ifndef __ASM_CPUTYPE_H | |
17 | #define __ASM_CPUTYPE_H | |
18 | ||
3e98fdac JM |
19 | #define INVALID_HWID ULONG_MAX |
20 | ||
4c7aa002 JM |
21 | #define MPIDR_HWID_BITMASK 0xff00ffffff |
22 | ||
b058450f LP |
23 | #define MPIDR_LEVEL_BITS_SHIFT 3 |
24 | #define MPIDR_LEVEL_BITS (1 << MPIDR_LEVEL_BITS_SHIFT) | |
25 | #define MPIDR_LEVEL_MASK ((1 << MPIDR_LEVEL_BITS) - 1) | |
26 | ||
27 | #define MPIDR_LEVEL_SHIFT(level) \ | |
28 | (((1 << level) >> 1) << MPIDR_LEVEL_BITS_SHIFT) | |
29 | ||
30 | #define MPIDR_AFFINITY_LEVEL(mpidr, level) \ | |
31 | ((mpidr >> MPIDR_LEVEL_SHIFT(level)) & MPIDR_LEVEL_MASK) | |
32 | ||
9cce7a43 CM |
33 | #define read_cpuid(reg) ({ \ |
34 | u64 __val; \ | |
148eb0a1 | 35 | asm("mrs %0, " #reg : "=r" (__val)); \ |
9cce7a43 CM |
36 | __val; \ |
37 | }) | |
38 | ||
d9c1951f | 39 | #define ARM_CPU_IMP_ARM 0x41 |
4ad637a4 | 40 | #define ARM_CPU_IMP_APM 0x50 |
d9c1951f MZ |
41 | |
42 | #define ARM_CPU_PART_AEM_V8 0xD0F0 | |
43 | #define ARM_CPU_PART_FOUNDATION 0xD000 | |
1252b331 | 44 | #define ARM_CPU_PART_CORTEX_A53 0xD030 |
d9c1951f MZ |
45 | #define ARM_CPU_PART_CORTEX_A57 0xD070 |
46 | ||
4ad637a4 VK |
47 | #define APM_CPU_PART_POTENZA 0x0000 |
48 | ||
0359b0e2 JM |
49 | #ifndef __ASSEMBLY__ |
50 | ||
9cce7a43 CM |
51 | /* |
52 | * The CPU ID never changes at run time, so we might as well tell the | |
53 | * compiler that it's constant. Use this function to read the CPU ID | |
54 | * rather than directly reading processor_id or read_cpuid() directly. | |
55 | */ | |
56 | static inline u32 __attribute_const__ read_cpuid_id(void) | |
57 | { | |
148eb0a1 | 58 | return read_cpuid(MIDR_EL1); |
9cce7a43 CM |
59 | } |
60 | ||
d9c1951f MZ |
61 | static inline u64 __attribute_const__ read_cpuid_mpidr(void) |
62 | { | |
148eb0a1 | 63 | return read_cpuid(MPIDR_EL1); |
d9c1951f MZ |
64 | } |
65 | ||
66 | static inline unsigned int __attribute_const__ read_cpuid_implementor(void) | |
67 | { | |
68 | return (read_cpuid_id() & 0xFF000000) >> 24; | |
69 | } | |
70 | ||
71 | static inline unsigned int __attribute_const__ read_cpuid_part_number(void) | |
72 | { | |
73 | return (read_cpuid_id() & 0xFFF0); | |
74 | } | |
75 | ||
9cce7a43 CM |
76 | static inline u32 __attribute_const__ read_cpuid_cachetype(void) |
77 | { | |
148eb0a1 | 78 | return read_cpuid(CTR_EL0); |
9cce7a43 CM |
79 | } |
80 | ||
0359b0e2 JM |
81 | #endif /* __ASSEMBLY__ */ |
82 | ||
9cce7a43 | 83 | #endif |