1 /* 2 * include/asm-ppc/cache.h 3 */ 4 #ifndef __ARCH_PPC_CACHE_H 5 #define __ARCH_PPC_CACHE_H 6 7 #include <asm/processor.h> 8 9 /* bytes per L1 cache line */ 10 #if defined(CONFIG_8xx) 11 #define L1_CACHE_SHIFT 4 12 #elif defined(CONFIG_PPC64BRIDGE) 13 #define L1_CACHE_SHIFT 7 14 #elif defined(CONFIG_E500MC) 15 #define L1_CACHE_SHIFT 6 16 #else 17 #define L1_CACHE_SHIFT 5 18 #endif 19 20 #define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT) 21 22 /* 23 * Use the L1 data cache line size value for the minimum DMA buffer alignment 24 * on PowerPC. 25 */ 26 #define ARCH_DMA_MINALIGN L1_CACHE_BYTES 27 28 /* 29 * For compatibility reasons support the CONFIG_SYS_CACHELINE_SIZE too 30 */ 31 #ifndef CONFIG_SYS_CACHELINE_SIZE 32 #define CONFIG_SYS_CACHELINE_SIZE L1_CACHE_BYTES 33 #endif 34 35 #define L1_CACHE_ALIGN(x) (((x)+(L1_CACHE_BYTES-1))&~(L1_CACHE_BYTES-1)) 36 #define L1_CACHE_PAGES 8 37 38 #define SMP_CACHE_BYTES L1_CACHE_BYTES 39 40 #ifdef MODULE 41 #define __cacheline_aligned __attribute__((__aligned__(L1_CACHE_BYTES))) 42 #else 43 #define __cacheline_aligned \ 44 __attribute__((__aligned__(L1_CACHE_BYTES), \ 45 __section__(".data.cacheline_aligned"))) 46 #endif 47 48 #if defined(__KERNEL__) && !defined(__ASSEMBLY__) 49 extern void flush_dcache_range(unsigned long start, unsigned long stop); 50 extern void clean_dcache_range(unsigned long start, unsigned long stop); 51 extern void invalidate_dcache_range(unsigned long start, unsigned long stop); 52 extern void flush_dcache(void); 53 extern void invalidate_dcache(void); 54 extern void invalidate_icache(void); 55 #ifdef CONFIG_SYS_INIT_RAM_LOCK 56 extern void unlock_ram_in_cache(void); 57 #endif /* CONFIG_SYS_INIT_RAM_LOCK */ 58 #endif /* __ASSEMBLY__ */ 59 60 #if defined(__KERNEL__) && !defined(__ASSEMBLY__) 61 int l2cache_init(void); 62 void enable_cpc(void); 63 void disable_cpc_sram(void); 64 #endif 65 66 /* prep registers for L2 */ 67 #define CACHECRBA 0x80000823 /* Cache configuration register address */ 68 #define L2CACHE_MASK 0x03 /* Mask for 2 L2 Cache bits */ 69 #define L2CACHE_512KB 0x00 /* 512KB */ 70 #define L2CACHE_256KB 0x01 /* 256KB */ 71 #define L2CACHE_1MB 0x02 /* 1MB */ 72 #define L2CACHE_NONE 0x03 /* NONE */ 73 #define L2CACHE_PARITY 0x08 /* Mask for L2 Cache Parity Protected bit */ 74 75 #ifdef CONFIG_8xx 76 /* Cache control on the MPC8xx is provided through some additional 77 * special purpose registers. 78 */ 79 #define IC_CST 560 /* Instruction cache control/status */ 80 #define IC_ADR 561 /* Address needed for some commands */ 81 #define IC_DAT 562 /* Read-only data register */ 82 #define DC_CST 568 /* Data cache control/status */ 83 #define DC_ADR 569 /* Address needed for some commands */ 84 #define DC_DAT 570 /* Read-only data register */ 85 86 /* Commands. Only the first few are available to the instruction cache. 87 */ 88 #define IDC_ENABLE 0x02000000 /* Cache enable */ 89 #define IDC_DISABLE 0x04000000 /* Cache disable */ 90 #define IDC_LDLCK 0x06000000 /* Load and lock */ 91 #define IDC_UNLINE 0x08000000 /* Unlock line */ 92 #define IDC_UNALL 0x0a000000 /* Unlock all */ 93 #define IDC_INVALL 0x0c000000 /* Invalidate all */ 94 95 #define DC_FLINE 0x0e000000 /* Flush data cache line */ 96 #define DC_SFWT 0x01000000 /* Set forced writethrough mode */ 97 #define DC_CFWT 0x03000000 /* Clear forced writethrough mode */ 98 #define DC_SLES 0x05000000 /* Set little endian swap mode */ 99 #define DC_CLES 0x07000000 /* Clear little endian swap mode */ 100 101 /* Status. 102 */ 103 #define IDC_ENABLED 0x80000000 /* Cache is enabled */ 104 #define IDC_CERR1 0x00200000 /* Cache error 1 */ 105 #define IDC_CERR2 0x00100000 /* Cache error 2 */ 106 #define IDC_CERR3 0x00080000 /* Cache error 3 */ 107 108 #define DC_DFWT 0x40000000 /* Data cache is forced write through */ 109 #define DC_LES 0x20000000 /* Caches are little endian mode */ 110 111 #if !defined(__ASSEMBLY__) 112 static inline uint rd_ic_cst(void) 113 { 114 return mfspr(IC_CST); 115 } 116 117 static inline void wr_ic_cst(uint val) 118 { 119 mtspr(IC_CST, val); 120 } 121 122 static inline void wr_ic_adr(uint val) 123 { 124 mtspr(IC_ADR, val); 125 } 126 127 static inline uint rd_dc_cst(void) 128 { 129 return mfspr(DC_CST); 130 } 131 132 static inline void wr_dc_cst(uint val) 133 { 134 mtspr(DC_CST, val); 135 } 136 137 static inline void wr_dc_adr(uint val) 138 { 139 mtspr(DC_ADR, val); 140 } 141 #endif 142 #endif /* CONFIG_8xx */ 143 144 #endif 145