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- /*
- * include/asm-ppc/cache.h
- */
- #ifndef __ARCH_PPC_CACHE_H
- #define __ARCH_PPC_CACHE_H
-
- #include <linux/config.h>
- #include <asm/processor.h>
- /*#include <asm/system.h>*/
-
- /* bytes per L1 cache line */
- #define L1_CACHE_BYTES 32
- #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
-
- #if defined(__KERNEL__) && !defined(__ASSEMBLY__)
- extern void flush_dcache_range(unsigned long start, unsigned long stop);
-
- static inline unsigned long unlock_dcache(void)
- {
- #ifndef CONFIG_8xx
- ulong hid0 = 0;
- /* 601 doesn't do this */
- if ( (ulong) _get_PVR() == 1 )
- return 0;
- asm("mfspr %0,1008 \n\t" : "=r" (hid0) );
- if ( !(hid0 & HID0_DLOCK) )
- return 0;
- asm("mtspr 1008,%0 \n\t" :: "r" (hid0 & ~(HID0_DLOCK)));
- return (hid0 & HID0_DLOCK) ? 1 : 0;
- #else /* ndef CONFIG_8xx */
- return 0;
- #endif
- }
-
- static inline void lock_dcache(unsigned long lockit)
- {
- #ifndef CONFIG_8xx
- /* 601 doesn't do this */
- if ( !lockit || ((ulong) _get_PVR() == 1) )
- return;
- asm("mfspr %0,1008 \n\t"
- "ori %0,%0,%2 \n\t"
- "mtspr 1008,%0 \n\t"
- "sync \n\t isync \n\t"
- : "=r" (lockit) : "0" (lockit), "i" (HID0_DLOCK));
- #endif /* ndef CONFIG_8xx */
- }
-
- #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
-