projects / mirror_ubuntu-zesty-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 0ba8b9b2 RK |
1 | #ifndef __ASM_ARM_CPUTYPE_H |
| 2 | #define __ASM_ARM_CPUTYPE_H | |
| 3 | ||
| 4 | #include <linux/stringify.h> | |
| 5 | ||
| 6 | #define CPUID_ID 0 | |
| 7 | #define CPUID_CACHETYPE 1 | |
| 8 | #define CPUID_TCM 2 | |
| 9 | #define CPUID_TLBTYPE 3 | |
| 10 | ||
| 11 | #ifdef CONFIG_CPU_CP15 | |
| 12 | #define read_cpuid(reg) \ | |
| 13 | ({ \ | |
| 14 | unsigned int __val; \ | |
| 15 | asm("mrc p15, 0, %0, c0, c0, " __stringify(reg) \ | |
| 16 | : "=r" (__val) \ | |
| 17 | : \ | |
| 18 | : "cc"); \ | |
| 19 | __val; \ | |
| 20 | }) | |
| 21 | #else | |
| 22 | extern unsigned int processor_id; | |
| 23 | #define read_cpuid(reg) (processor_id) | |
| 24 | #endif | |
| 25 | ||
| 26 | /* | |
| 27 | * The CPU ID never changes at run time, so we might as well tell the | |
| 28 | * compiler that it's constant. Use this function to read the CPU ID | |
| 29 | * rather than directly reading processor_id or read_cpuid() directly. | |
| 30 | */ | |
| 31 | static inline unsigned int __attribute_const__ read_cpuid_id(void) | |
| 32 | { | |
| 33 | return read_cpuid(CPUID_ID); | |
| 34 | } | |
| 35 | ||
| 36 | static inline unsigned int __attribute_const__ read_cpuid_cachetype(void) | |
| 37 | { | |
| 38 | return read_cpuid(CPUID_CACHETYPE); | |
| 39 | } | |
| 40 | ||
| 41 | /* | |
| 42 | * Intel's XScale3 core supports some v6 features (supersections, L2) | |
| 43 | * but advertises itself as v5 as it does not support the v6 ISA. For | |
| 44 | * this reason, we need a way to explicitly test for this type of CPU. | |
| 45 | */ | |
| 46 | #ifndef CONFIG_CPU_XSC3 | |
| 47 | #define cpu_is_xsc3() 0 | |
| 48 | #else | |
| 49 | static inline int cpu_is_xsc3(void) | |
| 50 | { | |
| 51 | if ((read_cpuid_id() & 0xffffe000) == 0x69056000) | |
| 52 | return 1; | |
| 53 | ||
| 54 | return 0; | |
| 55 | } | |
| 56 | #endif | |
| 57 | ||
| 58 | #if !defined(CONFIG_CPU_XSCALE) && !defined(CONFIG_CPU_XSC3) | |
| 59 | #define cpu_is_xscale() 0 | |
| 60 | #else | |
| 61 | #define cpu_is_xscale() 1 | |
| 62 | #endif | |
| 63 | ||
| 64 | #endif |