Russell King | 0ba8b9b | 2008-08-10 18:08:10 +0100 | [diff] [blame] | 1 | #ifndef __ASM_ARM_CPUTYPE_H |
| 2 | #define __ASM_ARM_CPUTYPE_H |
| 3 | |
| 4 | #include <linux/stringify.h> |
Jonathan Cameron | e9569c1 | 2011-04-14 12:11:42 +0100 | [diff] [blame] | 5 | #include <linux/kernel.h> |
Russell King | 0ba8b9b | 2008-08-10 18:08:10 +0100 | [diff] [blame] | 6 | |
| 7 | #define CPUID_ID 0 |
| 8 | #define CPUID_CACHETYPE 1 |
| 9 | #define CPUID_TCM 2 |
| 10 | #define CPUID_TLBTYPE 3 |
Vincent Guittot | c9018aa | 2011-08-08 13:21:59 +0100 | [diff] [blame] | 11 | #define CPUID_MPIDR 5 |
Russell King | 0ba8b9b | 2008-08-10 18:08:10 +0100 | [diff] [blame] | 12 | |
Catalin Marinas | faa7bc5 | 2009-05-30 14:00:14 +0100 | [diff] [blame] | 13 | #define CPUID_EXT_PFR0 "c1, 0" |
| 14 | #define CPUID_EXT_PFR1 "c1, 1" |
| 15 | #define CPUID_EXT_DFR0 "c1, 2" |
| 16 | #define CPUID_EXT_AFR0 "c1, 3" |
| 17 | #define CPUID_EXT_MMFR0 "c1, 4" |
| 18 | #define CPUID_EXT_MMFR1 "c1, 5" |
| 19 | #define CPUID_EXT_MMFR2 "c1, 6" |
| 20 | #define CPUID_EXT_MMFR3 "c1, 7" |
| 21 | #define CPUID_EXT_ISAR0 "c2, 0" |
| 22 | #define CPUID_EXT_ISAR1 "c2, 1" |
| 23 | #define CPUID_EXT_ISAR2 "c2, 2" |
| 24 | #define CPUID_EXT_ISAR3 "c2, 3" |
| 25 | #define CPUID_EXT_ISAR4 "c2, 4" |
| 26 | #define CPUID_EXT_ISAR5 "c2, 5" |
| 27 | |
Russell King | 2bbd7e9 | 2011-01-08 12:05:09 +0000 | [diff] [blame] | 28 | extern unsigned int processor_id; |
| 29 | |
Russell King | 0ba8b9b | 2008-08-10 18:08:10 +0100 | [diff] [blame] | 30 | #ifdef CONFIG_CPU_CP15 |
| 31 | #define read_cpuid(reg) \ |
| 32 | ({ \ |
| 33 | unsigned int __val; \ |
| 34 | asm("mrc p15, 0, %0, c0, c0, " __stringify(reg) \ |
| 35 | : "=r" (__val) \ |
| 36 | : \ |
| 37 | : "cc"); \ |
| 38 | __val; \ |
| 39 | }) |
Catalin Marinas | faa7bc5 | 2009-05-30 14:00:14 +0100 | [diff] [blame] | 40 | #define read_cpuid_ext(ext_reg) \ |
| 41 | ({ \ |
| 42 | unsigned int __val; \ |
| 43 | asm("mrc p15, 0, %0, c0, " ext_reg \ |
| 44 | : "=r" (__val) \ |
| 45 | : \ |
| 46 | : "cc"); \ |
| 47 | __val; \ |
| 48 | }) |
Russell King | 0ba8b9b | 2008-08-10 18:08:10 +0100 | [diff] [blame] | 49 | #else |
Russell King | 0ba8b9b | 2008-08-10 18:08:10 +0100 | [diff] [blame] | 50 | #define read_cpuid(reg) (processor_id) |
Catalin Marinas | faa7bc5 | 2009-05-30 14:00:14 +0100 | [diff] [blame] | 51 | #define read_cpuid_ext(reg) 0 |
Russell King | 0ba8b9b | 2008-08-10 18:08:10 +0100 | [diff] [blame] | 52 | #endif |
| 53 | |
| 54 | /* |
| 55 | * The CPU ID never changes at run time, so we might as well tell the |
| 56 | * compiler that it's constant. Use this function to read the CPU ID |
| 57 | * rather than directly reading processor_id or read_cpuid() directly. |
| 58 | */ |
| 59 | static inline unsigned int __attribute_const__ read_cpuid_id(void) |
| 60 | { |
| 61 | return read_cpuid(CPUID_ID); |
| 62 | } |
| 63 | |
| 64 | static inline unsigned int __attribute_const__ read_cpuid_cachetype(void) |
| 65 | { |
| 66 | return read_cpuid(CPUID_CACHETYPE); |
| 67 | } |
| 68 | |
Linus Walleij | bc58177 | 2009-09-15 17:30:37 +0100 | [diff] [blame] | 69 | static inline unsigned int __attribute_const__ read_cpuid_tcmstatus(void) |
| 70 | { |
| 71 | return read_cpuid(CPUID_TCM); |
| 72 | } |
| 73 | |
Vincent Guittot | c9018aa | 2011-08-08 13:21:59 +0100 | [diff] [blame] | 74 | static inline unsigned int __attribute_const__ read_cpuid_mpidr(void) |
| 75 | { |
| 76 | return read_cpuid(CPUID_MPIDR); |
| 77 | } |
| 78 | |
Russell King | 0ba8b9b | 2008-08-10 18:08:10 +0100 | [diff] [blame] | 79 | /* |
| 80 | * Intel's XScale3 core supports some v6 features (supersections, L2) |
| 81 | * but advertises itself as v5 as it does not support the v6 ISA. For |
| 82 | * this reason, we need a way to explicitly test for this type of CPU. |
| 83 | */ |
| 84 | #ifndef CONFIG_CPU_XSC3 |
| 85 | #define cpu_is_xsc3() 0 |
| 86 | #else |
| 87 | static inline int cpu_is_xsc3(void) |
| 88 | { |
Haojian Zhuang | 337c1db | 2009-08-21 16:10:41 +0800 | [diff] [blame] | 89 | unsigned int id; |
| 90 | id = read_cpuid_id() & 0xffffe000; |
| 91 | /* It covers both Intel ID and Marvell ID */ |
| 92 | if ((id == 0x69056000) || (id == 0x56056000)) |
Russell King | 0ba8b9b | 2008-08-10 18:08:10 +0100 | [diff] [blame] | 93 | return 1; |
| 94 | |
| 95 | return 0; |
| 96 | } |
| 97 | #endif |
| 98 | |
| 99 | #if !defined(CONFIG_CPU_XSCALE) && !defined(CONFIG_CPU_XSC3) |
| 100 | #define cpu_is_xscale() 0 |
| 101 | #else |
| 102 | #define cpu_is_xscale() 1 |
| 103 | #endif |
| 104 | |
| 105 | #endif |