diff options
Diffstat (limited to 'arch/powerpc/include/asm/pgtable.h')
| -rw-r--r-- | arch/powerpc/include/asm/pgtable.h | 54 |
1 files changed, 50 insertions, 4 deletions
diff --git a/arch/powerpc/include/asm/pgtable.h b/arch/powerpc/include/asm/pgtable.h index 81574f94ea3..eb17da78112 100644 --- a/arch/powerpc/include/asm/pgtable.h +++ b/arch/powerpc/include/asm/pgtable.h @@ -25,12 +25,58 @@ static inline void assert_pte_locked(struct mm_struct *mm, unsigned long addr) # include <asm/pgtable-ppc32.h> #endif -/* Special mapping for AGP */ -#define PAGE_AGP (PAGE_KERNEL_NC) -#define HAVE_PAGE_AGP - #ifndef __ASSEMBLY__ +/* Generic accessors to PTE bits */ +static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_RW; } +static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; } +static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; } +static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE; } +static inline int pte_special(pte_t pte) { return pte_val(pte) & _PAGE_SPECIAL; } +static inline int pte_present(pte_t pte) { return pte_val(pte) & _PAGE_PRESENT; } +static inline int pte_none(pte_t pte) { return (pte_val(pte) & ~_PTE_NONE_MASK) == 0; } +static inline pgprot_t pte_pgprot(pte_t pte) { return __pgprot(pte_val(pte) & PAGE_PROT_BITS); } + +/* Conversion functions: convert a page and protection to a page entry, + * and a page entry and page directory to the page they refer to. + * + * Even if PTEs can be unsigned long long, a PFN is always an unsigned + * long for now. + */ +static inline pte_t pfn_pte(unsigned long pfn, pgprot_t pgprot) { + return __pte(((pte_basic_t)(pfn) << PTE_RPN_SHIFT) | + pgprot_val(pgprot)); } +static inline unsigned long pte_pfn(pte_t pte) { + return pte_val(pte) >> PTE_RPN_SHIFT; } + +/* Keep these as a macros to avoid include dependency mess */ +#define pte_page(x) pfn_to_page(pte_pfn(x)) +#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) + +/* Generic modifiers for PTE bits */ +static inline pte_t pte_wrprotect(pte_t pte) { + pte_val(pte) &= ~(_PAGE_RW | _PAGE_HWWRITE); return pte; } +static inline pte_t pte_mkclean(pte_t pte) { + pte_val(pte) &= ~(_PAGE_DIRTY | _PAGE_HWWRITE); return pte; } +static inline pte_t pte_mkold(pte_t pte) { + pte_val(pte) &= ~_PAGE_ACCESSED; return pte; } +static inline pte_t pte_mkwrite(pte_t pte) { + pte_val(pte) |= _PAGE_RW; return pte; } +static inline pte_t pte_mkdirty(pte_t pte) { + pte_val(pte) |= _PAGE_DIRTY; return pte; } +static inline pte_t pte_mkyoung(pte_t pte) { + pte_val(pte) |= _PAGE_ACCESSED; return pte; } +static inline pte_t pte_mkspecial(pte_t pte) { + pte_val(pte) |= _PAGE_SPECIAL; return pte; } +static inline pte_t pte_mkhuge(pte_t pte) { + return pte; } +static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) +{ + pte_val(pte) = (pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot); + return pte; +} + + /* Insert a PTE, top-level function is out of line. It uses an inline * low level function in the respective pgtable-* files */ |