diff options
Diffstat (limited to 'arch/sh/include/asm/pgtable_32.h')
| -rw-r--r-- | arch/sh/include/asm/pgtable_32.h | 30 |
1 files changed, 25 insertions, 5 deletions
diff --git a/arch/sh/include/asm/pgtable_32.h b/arch/sh/include/asm/pgtable_32.h index 72ea209195b..c0d359ce337 100644 --- a/arch/sh/include/asm/pgtable_32.h +++ b/arch/sh/include/asm/pgtable_32.h @@ -20,7 +20,7 @@ * - Bit 9 is reserved by everyone and used by _PAGE_PROTNONE. * * - Bits 10 and 11 are low bits of the PPN that are reserved on >= 4K pages. - * Bit 10 is used for _PAGE_ACCESSED, bit 11 remains unused. + * Bit 10 is used for _PAGE_ACCESSED, and bit 11 is used for _PAGE_SPECIAL. * * - On 29 bit platforms, bits 31 to 29 are used for the space attributes * and timing control which (together with bit 0) are moved into the @@ -52,6 +52,7 @@ #define _PAGE_PROTNONE 0x200 /* software: if not present */ #define _PAGE_ACCESSED 0x400 /* software: page referenced */ #define _PAGE_FILE _PAGE_WT /* software: pagecache or swap? */ +#define _PAGE_SPECIAL 0x800 /* software: special page */ #define _PAGE_SZ_MASK (_PAGE_SZ0 | _PAGE_SZ1) #define _PAGE_PR_MASK (_PAGE_RW | _PAGE_USER) @@ -86,6 +87,14 @@ #define _PAGE_PCC_ATR8 0x60000000 /* Attribute Memory space, 8 bit bus */ #define _PAGE_PCC_ATR16 0x60000001 /* Attribute Memory space, 6 bit bus */ +#ifndef CONFIG_X2TLB +/* copy the ptea attributes */ +static inline unsigned long copy_ptea_attributes(unsigned long x) +{ + return ((x >> 28) & 0xe) | (x & 0x1); +} +#endif + /* Mask which drops unused bits from the PTEL value */ #if defined(CONFIG_CPU_SH3) #define _PAGE_CLEAR_FLAGS (_PAGE_PROTNONE | _PAGE_ACCESSED| \ @@ -148,8 +157,12 @@ # define _PAGE_SZHUGE (_PAGE_FLAGS_HARD) #endif +/* + * Mask of bits that are to be preserved accross pgprot changes. + */ #define _PAGE_CHG_MASK \ - (PTE_MASK | _PAGE_ACCESSED | _PAGE_CACHABLE | _PAGE_DIRTY) + (PTE_MASK | _PAGE_ACCESSED | _PAGE_CACHABLE | \ + _PAGE_DIRTY | _PAGE_SPECIAL) #ifndef __ASSEMBLY__ @@ -328,7 +341,7 @@ static inline void set_pte(pte_t *ptep, pte_t pte) #define pte_dirty(pte) ((pte).pte_low & _PAGE_DIRTY) #define pte_young(pte) ((pte).pte_low & _PAGE_ACCESSED) #define pte_file(pte) ((pte).pte_low & _PAGE_FILE) -#define pte_special(pte) (0) +#define pte_special(pte) ((pte).pte_low & _PAGE_SPECIAL) #ifdef CONFIG_X2TLB #define pte_write(pte) ((pte).pte_high & _PAGE_EXT_USER_WRITE) @@ -358,8 +371,9 @@ PTE_BIT_FUNC(low, mkclean, &= ~_PAGE_DIRTY); PTE_BIT_FUNC(low, mkdirty, |= _PAGE_DIRTY); PTE_BIT_FUNC(low, mkold, &= ~_PAGE_ACCESSED); PTE_BIT_FUNC(low, mkyoung, |= _PAGE_ACCESSED); +PTE_BIT_FUNC(low, mkspecial, |= _PAGE_SPECIAL); -static inline pte_t pte_mkspecial(pte_t pte) { return pte; } +#define __HAVE_ARCH_PTE_SPECIAL /* * Macro and implementation to make a page protection as uncachable. @@ -394,13 +408,19 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) /* to find an entry in a page-table-directory. */ #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1)) -#define pgd_offset(mm, address) ((mm)->pgd+pgd_index(address)) +#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address)) +#define __pgd_offset(address) pgd_index(address) /* to find an entry in a kernel page-table-directory */ #define pgd_offset_k(address) pgd_offset(&init_mm, address) +#define __pud_offset(address) (((address) >> PUD_SHIFT) & (PTRS_PER_PUD-1)) +#define __pmd_offset(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)) + /* Find an entry in the third-level page table.. */ #define pte_index(address) ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) +#define __pte_offset(address) pte_index(address) + #define pte_offset_kernel(dir, address) \ ((pte_t *) pmd_page_vaddr(*(dir)) + pte_index(address)) #define pte_offset_map(dir, address) pte_offset_kernel(dir, address) |