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Diffstat (limited to 'include/asm-mips/pgtable-bits.h')
| -rw-r--r-- | include/asm-mips/pgtable-bits.h | 137 |
1 files changed, 0 insertions, 137 deletions
diff --git a/include/asm-mips/pgtable-bits.h b/include/asm-mips/pgtable-bits.h deleted file mode 100644 index 51b34a48c84a..000000000000 --- a/include/asm-mips/pgtable-bits.h +++ /dev/null @@ -1,137 +0,0 @@ -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (C) 1994 - 2002 by Ralf Baechle - * Copyright (C) 1999, 2000, 2001 Silicon Graphics, Inc. - * Copyright (C) 2002 Maciej W. Rozycki - */ -#ifndef _ASM_PGTABLE_BITS_H -#define _ASM_PGTABLE_BITS_H - - -/* - * Note that we shift the lower 32bits of each EntryLo[01] entry - * 6 bits to the left. That way we can convert the PFN into the - * physical address by a single 'and' operation and gain 6 additional - * bits for storing information which isn't present in a normal - * MIPS page table. - * - * Similar to the Alpha port, we need to keep track of the ref - * and mod bits in software. We have a software "yeah you can read - * from this page" bit, and a hardware one which actually lets the - * process read from the page. On the same token we have a software - * writable bit and the real hardware one which actually lets the - * process write to the page, this keeps a mod bit via the hardware - * dirty bit. - * - * Certain revisions of the R4000 and R5000 have a bug where if a - * certain sequence occurs in the last 3 instructions of an executable - * page, and the following page is not mapped, the cpu can do - * unpredictable things. The code (when it is written) to deal with - * this problem will be in the update_mmu_cache() code for the r4k. - */ -#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32) - -#define _PAGE_PRESENT (1<<6) /* implemented in software */ -#define _PAGE_READ (1<<7) /* implemented in software */ -#define _PAGE_WRITE (1<<8) /* implemented in software */ -#define _PAGE_ACCESSED (1<<9) /* implemented in software */ -#define _PAGE_MODIFIED (1<<10) /* implemented in software */ -#define _PAGE_FILE (1<<10) /* set:pagecache unset:swap */ - -#define _PAGE_R4KBUG (1<<0) /* workaround for r4k bug */ -#define _PAGE_GLOBAL (1<<0) -#define _PAGE_VALID (1<<1) -#define _PAGE_SILENT_READ (1<<1) /* synonym */ -#define _PAGE_DIRTY (1<<2) /* The MIPS dirty bit */ -#define _PAGE_SILENT_WRITE (1<<2) -#define _CACHE_SHIFT 3 -#define _CACHE_MASK (7<<3) - -#else - -#define _PAGE_PRESENT (1<<0) /* implemented in software */ -#define _PAGE_READ (1<<1) /* implemented in software */ -#define _PAGE_WRITE (1<<2) /* implemented in software */ -#define _PAGE_ACCESSED (1<<3) /* implemented in software */ -#define _PAGE_MODIFIED (1<<4) /* implemented in software */ -#define _PAGE_FILE (1<<4) /* set:pagecache unset:swap */ - -#if defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX) - -#define _PAGE_GLOBAL (1<<8) -#define _PAGE_VALID (1<<9) -#define _PAGE_SILENT_READ (1<<9) /* synonym */ -#define _PAGE_DIRTY (1<<10) /* The MIPS dirty bit */ -#define _PAGE_SILENT_WRITE (1<<10) -#define _CACHE_UNCACHED (1<<11) -#define _CACHE_MASK (1<<11) - -#else - -#define _PAGE_R4KBUG (1<<5) /* workaround for r4k bug */ -#define _PAGE_GLOBAL (1<<6) -#define _PAGE_VALID (1<<7) -#define _PAGE_SILENT_READ (1<<7) /* synonym */ -#define _PAGE_DIRTY (1<<8) /* The MIPS dirty bit */ -#define _PAGE_SILENT_WRITE (1<<8) -#define _CACHE_SHIFT 9 -#define _CACHE_MASK (7<<9) - -#endif -#endif /* defined(CONFIG_64BIT_PHYS_ADDR && defined(CONFIG_CPU_MIPS32) */ - - -/* - * Cache attributes - */ -#if defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX) - -#define _CACHE_CACHABLE_NONCOHERENT 0 - -#elif defined(CONFIG_CPU_SB1) - -/* No penalty for being coherent on the SB1, so just - use it for "noncoherent" spaces, too. Shouldn't hurt. */ - -#define _CACHE_UNCACHED (2<<_CACHE_SHIFT) -#define _CACHE_CACHABLE_COW (5<<_CACHE_SHIFT) -#define _CACHE_CACHABLE_NONCOHERENT (5<<_CACHE_SHIFT) -#define _CACHE_UNCACHED_ACCELERATED (7<<_CACHE_SHIFT) - -#elif defined(CONFIG_CPU_RM9000) - -#define _CACHE_WT (0<<_CACHE_SHIFT) -#define _CACHE_WTWA (1<<_CACHE_SHIFT) -#define _CACHE_UC_B (2<<_CACHE_SHIFT) -#define _CACHE_WB (3<<_CACHE_SHIFT) -#define _CACHE_CWBEA (4<<_CACHE_SHIFT) -#define _CACHE_CWB (5<<_CACHE_SHIFT) -#define _CACHE_UCNB (6<<_CACHE_SHIFT) -#define _CACHE_FPC (7<<_CACHE_SHIFT) - -#define _CACHE_UNCACHED _CACHE_UC_B -#define _CACHE_CACHABLE_NONCOHERENT _CACHE_WB - -#else - -#define _CACHE_CACHABLE_NO_WA (0<<_CACHE_SHIFT) /* R4600 only */ -#define _CACHE_CACHABLE_WA (1<<_CACHE_SHIFT) /* R4600 only */ -#define _CACHE_UNCACHED (2<<_CACHE_SHIFT) /* R4[0246]00 */ -#define _CACHE_CACHABLE_NONCOHERENT (3<<_CACHE_SHIFT) /* R4[0246]00 */ -#define _CACHE_CACHABLE_CE (4<<_CACHE_SHIFT) /* R4[04]00MC only */ -#define _CACHE_CACHABLE_COW (5<<_CACHE_SHIFT) /* R4[04]00MC only */ -#define _CACHE_CACHABLE_COHERENT (5<<_CACHE_SHIFT) /* MIPS32R2 CMP */ -#define _CACHE_CACHABLE_CUW (6<<_CACHE_SHIFT) /* R4[04]00MC only */ -#define _CACHE_UNCACHED_ACCELERATED (7<<_CACHE_SHIFT) /* R10000 only */ - -#endif - -#define __READABLE (_PAGE_READ | _PAGE_SILENT_READ | _PAGE_ACCESSED) -#define __WRITEABLE (_PAGE_WRITE | _PAGE_SILENT_WRITE | _PAGE_MODIFIED) - -#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_ACCESSED | _PAGE_MODIFIED | _CACHE_MASK) - -#endif /* _ASM_PGTABLE_BITS_H */ |