1 #ifndef _ASM_POWERPC_CACHE_H 2 #define _ASM_POWERPC_CACHE_H 3 4 #ifdef __KERNEL__ 5 6 #include <asm/reg.h> 7 8 /* bytes per L1 cache line */ 9 #if defined(CONFIG_8xx) || defined(CONFIG_403GCX) 10 #define L1_CACHE_SHIFT 4 11 #define MAX_COPY_PREFETCH 1 12 #elif defined(CONFIG_PPC_E500MC) 13 #define L1_CACHE_SHIFT 6 14 #define MAX_COPY_PREFETCH 4 15 #elif defined(CONFIG_PPC32) 16 #define MAX_COPY_PREFETCH 4 17 #if defined(CONFIG_PPC_47x) 18 #define L1_CACHE_SHIFT 7 19 #else 20 #define L1_CACHE_SHIFT 5 21 #endif 22 #else /* CONFIG_PPC64 */ 23 #define L1_CACHE_SHIFT 7 24 #endif 25 26 #define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT) 27 28 #define SMP_CACHE_BYTES L1_CACHE_BYTES 29 30 #if defined(__powerpc64__) && !defined(__ASSEMBLY__) 31 struct ppc64_caches { 32 u32 dsize; /* L1 d-cache size */ 33 u32 dline_size; /* L1 d-cache line size */ 34 u32 log_dline_size; 35 u32 dlines_per_page; 36 u32 isize; /* L1 i-cache size */ 37 u32 iline_size; /* L1 i-cache line size */ 38 u32 log_iline_size; 39 u32 ilines_per_page; 40 }; 41 42 extern struct ppc64_caches ppc64_caches; 43 44 static inline void logmpp(u64 x) 45 { 46 asm volatile(PPC_LOGMPP(R1) : : "r" (x)); 47 } 48 49 #endif /* __powerpc64__ && ! __ASSEMBLY__ */ 50 51 #if defined(__ASSEMBLY__) 52 /* 53 * For a snooping icache, we still need a dummy icbi to purge all the 54 * prefetched instructions from the ifetch buffers. We also need a sync 55 * before the icbi to order the the actual stores to memory that might 56 * have modified instructions with the icbi. 57 */ 58 #define PURGE_PREFETCHED_INS \ 59 sync; \ 60 icbi 0,r3; \ 61 sync; \ 62 isync 63 64 #else 65 #define __read_mostly __attribute__((__section__(".data..read_mostly"))) 66 67 #ifdef CONFIG_6xx 68 extern long _get_L2CR(void); 69 extern long _get_L3CR(void); 70 extern void _set_L2CR(unsigned long); 71 extern void _set_L3CR(unsigned long); 72 #else 73 #define _get_L2CR() 0L 74 #define _get_L3CR() 0L 75 #define _set_L2CR(val) do { } while(0) 76 #define _set_L3CR(val) do { } while(0) 77 #endif 78 79 extern void cacheable_memzero(void *p, unsigned int nb); 80 extern void *cacheable_memcpy(void *, const void *, unsigned int); 81 82 #endif /* !__ASSEMBLY__ */ 83 #endif /* __KERNEL__ */ 84 #endif /* _ASM_POWERPC_CACHE_H */ 85