diff options
Diffstat (limited to 'arch/mips/include/asm/pgtable-bits.h')
| -rw-r--r-- | arch/mips/include/asm/pgtable-bits.h | 83 |
1 files changed, 32 insertions, 51 deletions
diff --git a/arch/mips/include/asm/pgtable-bits.h b/arch/mips/include/asm/pgtable-bits.h index fc807aa5ec8d..91747c282bb3 100644 --- a/arch/mips/include/asm/pgtable-bits.h +++ b/arch/mips/include/asm/pgtable-bits.h @@ -35,7 +35,7 @@ #if defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32) /* - * The following bits are directly used by the TLB hardware + * The following bits are implemented by the TLB hardware */ #define _PAGE_GLOBAL_SHIFT 0 #define _PAGE_GLOBAL (1 << _PAGE_GLOBAL_SHIFT) @@ -60,43 +60,40 @@ #define _PAGE_MODIFIED_SHIFT (_PAGE_ACCESSED_SHIFT + 1) #define _PAGE_MODIFIED (1 << _PAGE_MODIFIED_SHIFT) -#define _PAGE_SILENT_READ _PAGE_VALID -#define _PAGE_SILENT_WRITE _PAGE_DIRTY - #define _PFN_SHIFT (PAGE_SHIFT - 12 + _CACHE_SHIFT + 3) #elif defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX) /* - * The following are implemented by software + * The following bits are implemented in software */ -#define _PAGE_PRESENT_SHIFT 0 -#define _PAGE_PRESENT (1 << _PAGE_PRESENT_SHIFT) -#define _PAGE_READ_SHIFT 1 -#define _PAGE_READ (1 << _PAGE_READ_SHIFT) -#define _PAGE_WRITE_SHIFT 2 -#define _PAGE_WRITE (1 << _PAGE_WRITE_SHIFT) -#define _PAGE_ACCESSED_SHIFT 3 -#define _PAGE_ACCESSED (1 << _PAGE_ACCESSED_SHIFT) -#define _PAGE_MODIFIED_SHIFT 4 -#define _PAGE_MODIFIED (1 << _PAGE_MODIFIED_SHIFT) +#define _PAGE_PRESENT_SHIFT (0) +#define _PAGE_PRESENT (1 << _PAGE_PRESENT_SHIFT) +#define _PAGE_READ_SHIFT (_PAGE_PRESENT_SHIFT + 1) +#define _PAGE_READ (1 << _PAGE_READ_SHIFT) +#define _PAGE_WRITE_SHIFT (_PAGE_READ_SHIFT + 1) +#define _PAGE_WRITE (1 << _PAGE_WRITE_SHIFT) +#define _PAGE_ACCESSED_SHIFT (_PAGE_WRITE_SHIFT + 1) +#define _PAGE_ACCESSED (1 << _PAGE_ACCESSED_SHIFT) +#define _PAGE_MODIFIED_SHIFT (_PAGE_ACCESSED_SHIFT + 1) +#define _PAGE_MODIFIED (1 << _PAGE_MODIFIED_SHIFT) /* - * And these are the hardware TLB bits + * The following bits are implemented by the TLB hardware */ -#define _PAGE_GLOBAL_SHIFT 8 -#define _PAGE_GLOBAL (1 << _PAGE_GLOBAL_SHIFT) -#define _PAGE_VALID_SHIFT 9 -#define _PAGE_VALID (1 << _PAGE_VALID_SHIFT) -#define _PAGE_SILENT_READ (1 << _PAGE_VALID_SHIFT) /* synonym */ -#define _PAGE_DIRTY_SHIFT 10 +#define _PAGE_GLOBAL_SHIFT (_PAGE_MODIFIED_SHIFT + 4) +#define _PAGE_GLOBAL (1 << _PAGE_GLOBAL_SHIFT) +#define _PAGE_VALID_SHIFT (_PAGE_GLOBAL_SHIFT + 1) +#define _PAGE_VALID (1 << _PAGE_VALID_SHIFT) +#define _PAGE_DIRTY_SHIFT (_PAGE_VALID_SHIFT + 1) #define _PAGE_DIRTY (1 << _PAGE_DIRTY_SHIFT) -#define _PAGE_SILENT_WRITE (1 << _PAGE_DIRTY_SHIFT) -#define _CACHE_UNCACHED_SHIFT 11 +#define _CACHE_UNCACHED_SHIFT (_PAGE_DIRTY_SHIFT + 1) #define _CACHE_UNCACHED (1 << _CACHE_UNCACHED_SHIFT) -#define _CACHE_MASK (1 << _CACHE_UNCACHED_SHIFT) +#define _CACHE_MASK _CACHE_UNCACHED -#else /* 'Normal' r4K case */ +#define _PFN_SHIFT PAGE_SHIFT + +#else /* * When using the RI/XI bit support, we have 13 bits of flags below * the physical address. The RI/XI bits are placed such that a SRL 5 @@ -107,10 +104,8 @@ /* * The following bits are implemented in software - * - * _PAGE_READ / _PAGE_READ_SHIFT should be unused if cpu_has_rixi. */ -#define _PAGE_PRESENT_SHIFT (0) +#define _PAGE_PRESENT_SHIFT 0 #define _PAGE_PRESENT (1 << _PAGE_PRESENT_SHIFT) #define _PAGE_READ_SHIFT (cpu_has_rixi ? _PAGE_PRESENT_SHIFT : _PAGE_PRESENT_SHIFT + 1) #define _PAGE_READ ({BUG_ON(cpu_has_rixi); 1 << _PAGE_READ_SHIFT; }) @@ -125,16 +120,11 @@ /* huge tlb page */ #define _PAGE_HUGE_SHIFT (_PAGE_MODIFIED_SHIFT + 1) #define _PAGE_HUGE (1 << _PAGE_HUGE_SHIFT) -#else -#define _PAGE_HUGE_SHIFT (_PAGE_MODIFIED_SHIFT) -#define _PAGE_HUGE ({BUG(); 1; }) /* Dummy value */ -#endif - -#ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT -/* huge tlb page */ #define _PAGE_SPLITTING_SHIFT (_PAGE_HUGE_SHIFT + 1) #define _PAGE_SPLITTING (1 << _PAGE_SPLITTING_SHIFT) #else +#define _PAGE_HUGE_SHIFT (_PAGE_MODIFIED_SHIFT) +#define _PAGE_HUGE ({BUG(); 1; }) /* Dummy value */ #define _PAGE_SPLITTING_SHIFT (_PAGE_HUGE_SHIFT) #define _PAGE_SPLITTING ({BUG(); 1; }) /* Dummy value */ #endif @@ -149,17 +139,10 @@ #define _PAGE_GLOBAL_SHIFT (_PAGE_NO_READ_SHIFT + 1) #define _PAGE_GLOBAL (1 << _PAGE_GLOBAL_SHIFT) - #define _PAGE_VALID_SHIFT (_PAGE_GLOBAL_SHIFT + 1) #define _PAGE_VALID (1 << _PAGE_VALID_SHIFT) -/* synonym */ -#define _PAGE_SILENT_READ (_PAGE_VALID) - -/* The MIPS dirty bit */ #define _PAGE_DIRTY_SHIFT (_PAGE_VALID_SHIFT + 1) #define _PAGE_DIRTY (1 << _PAGE_DIRTY_SHIFT) -#define _PAGE_SILENT_WRITE (_PAGE_DIRTY) - #define _CACHE_SHIFT (_PAGE_DIRTY_SHIFT + 1) #define _CACHE_MASK (7 << _CACHE_SHIFT) @@ -167,9 +150,9 @@ #endif /* defined(CONFIG_PHYS_ADDR_T_64BIT && defined(CONFIG_CPU_MIPS32) */ -#ifndef _PFN_SHIFT -#define _PFN_SHIFT PAGE_SHIFT -#endif +#define _PAGE_SILENT_READ _PAGE_VALID +#define _PAGE_SILENT_WRITE _PAGE_DIRTY + #define _PFN_MASK (~((1 << (_PFN_SHIFT)) - 1)) #ifndef _PAGE_NO_READ @@ -179,9 +162,6 @@ #ifndef _PAGE_NO_EXEC #define _PAGE_NO_EXEC ({BUG(); 0; }) #endif -#ifndef _PAGE_GLOBAL_SHIFT -#define _PAGE_GLOBAL_SHIFT ilog2(_PAGE_GLOBAL) -#endif #ifndef __ASSEMBLY__ @@ -266,8 +246,9 @@ static inline uint64_t pte_to_entrylo(unsigned long pte_val) #endif #define __READABLE (_PAGE_SILENT_READ | _PAGE_ACCESSED | (cpu_has_rixi ? 0 : _PAGE_READ)) -#define __WRITEABLE (_PAGE_WRITE | _PAGE_SILENT_WRITE | _PAGE_MODIFIED) +#define __WRITEABLE (_PAGE_SILENT_WRITE | _PAGE_WRITE | _PAGE_MODIFIED) -#define _PAGE_CHG_MASK (_PFN_MASK | _PAGE_ACCESSED | _PAGE_MODIFIED | _CACHE_MASK) +#define _PAGE_CHG_MASK (_PAGE_ACCESSED | _PAGE_MODIFIED | \ + _PFN_MASK | _CACHE_MASK) #endif /* _ASM_PGTABLE_BITS_H */ |