1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_POWERPC_CACHE_H 3 #define _ASM_POWERPC_CACHE_H 4 5 #ifdef __KERNEL__ 6 7 8 /* bytes per L1 cache line */ 9 #if defined(CONFIG_PPC_8xx) 10 #define L1_CACHE_SHIFT 4 11 #define MAX_COPY_PREFETCH 1 12 #define IFETCH_ALIGN_SHIFT 2 13 #elif defined(CONFIG_PPC_E500MC) 14 #define L1_CACHE_SHIFT 6 15 #define MAX_COPY_PREFETCH 4 16 #define IFETCH_ALIGN_SHIFT 3 17 #elif defined(CONFIG_PPC32) 18 #define MAX_COPY_PREFETCH 4 19 #define IFETCH_ALIGN_SHIFT 3 /* 603 fetches 2 insn at a time */ 20 #if defined(CONFIG_PPC_47x) 21 #define L1_CACHE_SHIFT 7 22 #else 23 #define L1_CACHE_SHIFT 5 24 #endif 25 #else /* CONFIG_PPC64 */ 26 #define L1_CACHE_SHIFT 7 27 #define IFETCH_ALIGN_SHIFT 4 /* POWER8,9 */ 28 #endif 29 30 #define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT) 31 32 #define SMP_CACHE_BYTES L1_CACHE_BYTES 33 34 #define IFETCH_ALIGN_BYTES (1 << IFETCH_ALIGN_SHIFT) 35 36 #if !defined(__ASSEMBLY__) 37 #ifdef CONFIG_PPC64 38 39 struct ppc_cache_info { 40 u32 size; 41 u32 line_size; 42 u32 block_size; /* L1 only */ 43 u32 log_block_size; 44 u32 blocks_per_page; 45 u32 sets; 46 u32 assoc; 47 }; 48 49 struct ppc64_caches { 50 struct ppc_cache_info l1d; 51 struct ppc_cache_info l1i; 52 struct ppc_cache_info l2; 53 struct ppc_cache_info l3; 54 }; 55 56 extern struct ppc64_caches ppc64_caches; 57 58 static inline u32 l1_dcache_shift(void) 59 { 60 return ppc64_caches.l1d.log_block_size; 61 } 62 63 static inline u32 l1_dcache_bytes(void) 64 { 65 return ppc64_caches.l1d.block_size; 66 } 67 68 static inline u32 l1_icache_shift(void) 69 { 70 return ppc64_caches.l1i.log_block_size; 71 } 72 73 static inline u32 l1_icache_bytes(void) 74 { 75 return ppc64_caches.l1i.block_size; 76 } 77 #else 78 static inline u32 l1_dcache_shift(void) 79 { 80 return L1_CACHE_SHIFT; 81 } 82 83 static inline u32 l1_dcache_bytes(void) 84 { 85 return L1_CACHE_BYTES; 86 } 87 88 static inline u32 l1_icache_shift(void) 89 { 90 return L1_CACHE_SHIFT; 91 } 92 93 static inline u32 l1_icache_bytes(void) 94 { 95 return L1_CACHE_BYTES; 96 } 97 98 #endif 99 100 #define __read_mostly __section(.data..read_mostly) 101 102 #ifdef CONFIG_PPC_BOOK3S_32 103 extern long _get_L2CR(void); 104 extern long _get_L3CR(void); 105 extern void _set_L2CR(unsigned long); 106 extern void _set_L3CR(unsigned long); 107 #else 108 #define _get_L2CR() 0L 109 #define _get_L3CR() 0L 110 #define _set_L2CR(val) do { } while(0) 111 #define _set_L3CR(val) do { } while(0) 112 #endif 113 114 static inline void dcbz(void *addr) 115 { 116 __asm__ __volatile__ ("dcbz 0, %0" : : "r"(addr) : "memory"); 117 } 118 119 static inline void dcbi(void *addr) 120 { 121 __asm__ __volatile__ ("dcbi 0, %0" : : "r"(addr) : "memory"); 122 } 123 124 static inline void dcbf(void *addr) 125 { 126 __asm__ __volatile__ ("dcbf 0, %0" : : "r"(addr) : "memory"); 127 } 128 129 static inline void dcbst(void *addr) 130 { 131 __asm__ __volatile__ ("dcbst 0, %0" : : "r"(addr) : "memory"); 132 } 133 134 static inline void icbi(void *addr) 135 { 136 asm volatile ("icbi 0, %0" : : "r"(addr) : "memory"); 137 } 138 139 static inline void iccci(void *addr) 140 { 141 asm volatile ("iccci 0, %0" : : "r"(addr) : "memory"); 142 } 143 144 #endif /* !__ASSEMBLY__ */ 145 #endif /* __KERNEL__ */ 146 #endif /* _ASM_POWERPC_CACHE_H */ 147