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Diffstat (limited to 'arch/powerpc/include/asm/cache.h')
| -rw-r--r-- | arch/powerpc/include/asm/cache.h | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/cache.h b/arch/powerpc/include/asm/cache.h new file mode 100644 index 000000000..53e8d05f5 --- /dev/null +++ b/arch/powerpc/include/asm/cache.h @@ -0,0 +1,101 @@ +/* + * include/asm-ppc/cache.h + */ +#ifndef __ARCH_PPC_CACHE_H +#define __ARCH_PPC_CACHE_H + +#include <linux/config.h> +#include <asm/processor.h> + +/* bytes per L1 cache line */ +#if defined(CONFIG_8xx) || defined(CONFIG_IOP480) +#define L1_CACHE_SHIFT 4 +#elif defined(CONFIG_PPC64BRIDGE) +#define L1_CACHE_SHIFT 7 +#elif defined(CONFIG_E500MC) +#define L1_CACHE_SHIFT 6 +#else +#define L1_CACHE_SHIFT 5 +#endif + +#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT) + +/* + * For compatibility reasons support the CONFIG_SYS_CACHELINE_SIZE too + */ +#ifndef CONFIG_SYS_CACHELINE_SIZE +#define CONFIG_SYS_CACHELINE_SIZE L1_CACHE_BYTES +#endif + +#define L1_CACHE_ALIGN(x) (((x)+(L1_CACHE_BYTES-1))&~(L1_CACHE_BYTES-1)) +#define L1_CACHE_PAGES 8 + +#define SMP_CACHE_BYTES L1_CACHE_BYTES + +#ifdef MODULE +#define __cacheline_aligned __attribute__((__aligned__(L1_CACHE_BYTES))) +#else +#define __cacheline_aligned \ + __attribute__((__aligned__(L1_CACHE_BYTES), \ + __section__(".data.cacheline_aligned"))) +#endif + +#if defined(__KERNEL__) && !defined(__ASSEMBLY__) +extern void flush_dcache_range(unsigned long start, unsigned long stop); +extern void clean_dcache_range(unsigned long start, unsigned long stop); +extern void invalidate_dcache_range(unsigned long start, unsigned long stop); +extern void flush_dcache(void); +extern void invalidate_dcache(void); +extern void invalidate_icache(void); +#ifdef CONFIG_SYS_INIT_RAM_LOCK +extern void unlock_ram_in_cache(void); +#endif /* CONFIG_SYS_INIT_RAM_LOCK */ +#endif /* __ASSEMBLY__ */ + +/* prep registers for L2 */ +#define CACHECRBA 0x80000823 /* Cache configuration register address */ +#define L2CACHE_MASK 0x03 /* Mask for 2 L2 Cache bits */ +#define L2CACHE_512KB 0x00 /* 512KB */ +#define L2CACHE_256KB 0x01 /* 256KB */ +#define L2CACHE_1MB 0x02 /* 1MB */ +#define L2CACHE_NONE 0x03 /* NONE */ +#define L2CACHE_PARITY 0x08 /* Mask for L2 Cache Parity Protected bit */ + +#ifdef CONFIG_8xx +/* Cache control on the MPC8xx is provided through some additional + * special purpose registers. + */ +#define IC_CST 560 /* Instruction cache control/status */ +#define IC_ADR 561 /* Address needed for some commands */ +#define IC_DAT 562 /* Read-only data register */ +#define DC_CST 568 /* Data cache control/status */ +#define DC_ADR 569 /* Address needed for some commands */ +#define DC_DAT 570 /* Read-only data register */ + +/* Commands. Only the first few are available to the instruction cache. +*/ +#define IDC_ENABLE 0x02000000 /* Cache enable */ +#define IDC_DISABLE 0x04000000 /* Cache disable */ +#define IDC_LDLCK 0x06000000 /* Load and lock */ +#define IDC_UNLINE 0x08000000 /* Unlock line */ +#define IDC_UNALL 0x0a000000 /* Unlock all */ +#define IDC_INVALL 0x0c000000 /* Invalidate all */ + +#define DC_FLINE 0x0e000000 /* Flush data cache line */ +#define DC_SFWT 0x01000000 /* Set forced writethrough mode */ +#define DC_CFWT 0x03000000 /* Clear forced writethrough mode */ +#define DC_SLES 0x05000000 /* Set little endian swap mode */ +#define DC_CLES 0x07000000 /* Clear little endian swap mode */ + +/* Status. +*/ +#define IDC_ENABLED 0x80000000 /* Cache is enabled */ +#define IDC_CERR1 0x00200000 /* Cache error 1 */ +#define IDC_CERR2 0x00100000 /* Cache error 2 */ +#define IDC_CERR3 0x00080000 /* Cache error 3 */ + +#define DC_DFWT 0x40000000 /* Data cache is forced write through */ +#define DC_LES 0x20000000 /* Caches are little endian mode */ +#endif /* CONFIG_8xx */ + +#endif |