projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 46097c7d RK |
1 | #ifndef __ASM_ARM_CACHETYPE_H |
| 2 | #define __ASM_ARM_CACHETYPE_H | |
| 3 | ||
| c0e95878 RK |
4 | #define CACHEID_VIVT (1 << 0) |
| 5 | #define CACHEID_VIPT_NONALIASING (1 << 1) | |
| 6 | #define CACHEID_VIPT_ALIASING (1 << 2) | |
| 7 | #define CACHEID_VIPT (CACHEID_VIPT_ALIASING|CACHEID_VIPT_NONALIASING) | |
| 8 | #define CACHEID_ASID_TAGGED (1 << 3) | |
| 8925ec4c | 9 | #define CACHEID_VIPT_I_ALIASING (1 << 4) |
| 7f94e9cc | 10 | #define CACHEID_PIPT (1 << 5) |
| 46097c7d | 11 | |
| c0e95878 | 12 | extern unsigned int cacheid; |
| 46097c7d | 13 | |
| c0e95878 RK |
14 | #define cache_is_vivt() cacheid_is(CACHEID_VIVT) |
| 15 | #define cache_is_vipt() cacheid_is(CACHEID_VIPT) | |
| 16 | #define cache_is_vipt_nonaliasing() cacheid_is(CACHEID_VIPT_NONALIASING) | |
| 17 | #define cache_is_vipt_aliasing() cacheid_is(CACHEID_VIPT_ALIASING) | |
| 18 | #define icache_is_vivt_asid_tagged() cacheid_is(CACHEID_ASID_TAGGED) | |
| 8925ec4c | 19 | #define icache_is_vipt_aliasing() cacheid_is(CACHEID_VIPT_I_ALIASING) |
| 7f94e9cc | 20 | #define icache_is_pipt() cacheid_is(CACHEID_PIPT) |
| 46097c7d | 21 | |
| 46097c7d | 22 | /* |
| c0e95878 RK |
23 | * __LINUX_ARM_ARCH__ is the minimum supported CPU architecture |
| 24 | * Mask out support which will never be present on newer CPUs. | |
| 25 | * - v6+ is never VIVT | |
| 8925ec4c | 26 | * - v7+ VIPT never aliases on D-side |
| 46097c7d | 27 | */ |
| c0e95878 | 28 | #if __LINUX_ARM_ARCH__ >= 7 |
| 8925ec4c WD |
29 | #define __CACHEID_ARCH_MIN (CACHEID_VIPT_NONALIASING |\ |
| 30 | CACHEID_ASID_TAGGED |\ | |
| 7f94e9cc WD |
31 | CACHEID_VIPT_I_ALIASING |\ |
| 32 | CACHEID_PIPT) | |
| c0e95878 RK |
33 | #elif __LINUX_ARM_ARCH__ >= 6 |
| 34 | #define __CACHEID_ARCH_MIN (~CACHEID_VIVT) | |
| 35 | #else | |
| 36 | #define __CACHEID_ARCH_MIN (~0) | |
| 37 | #endif | |
| 46097c7d | 38 | |
| 46097c7d | 39 | /* |
| c0e95878 | 40 | * Mask out support which isn't configured |
| 46097c7d | 41 | */ |
| c0e95878 RK |
42 | #if defined(CONFIG_CPU_CACHE_VIVT) && !defined(CONFIG_CPU_CACHE_VIPT) |
| 43 | #define __CACHEID_ALWAYS (CACHEID_VIVT) | |
| 44 | #define __CACHEID_NEVER (~CACHEID_VIVT) | |
| 45 | #elif !defined(CONFIG_CPU_CACHE_VIVT) && defined(CONFIG_CPU_CACHE_VIPT) | |
| 46 | #define __CACHEID_ALWAYS (0) | |
| 47 | #define __CACHEID_NEVER (CACHEID_VIVT) | |
| 46097c7d | 48 | #else |
| c0e95878 RK |
49 | #define __CACHEID_ALWAYS (0) |
| 50 | #define __CACHEID_NEVER (0) | |
| 46097c7d RK |
51 | #endif |
| 52 | ||
| c0e95878 RK |
53 | static inline unsigned int __attribute__((pure)) cacheid_is(unsigned int mask) |
| 54 | { | |
| 55 | return (__CACHEID_ALWAYS & mask) | | |
| 56 | (~__CACHEID_NEVER & __CACHEID_ARCH_MIN & mask & cacheid); | |
| 57 | } | |
| 58 | ||
| 46097c7d | 59 | #endif |