diff options
Diffstat (limited to 'arch/x86/include/asm/page_types.h')
-rw-r--r-- | arch/x86/include/asm/page_types.h | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/arch/x86/include/asm/page_types.h b/arch/x86/include/asm/page_types.h new file mode 100644 index 00000000000..65787ad4c59 --- /dev/null +++ b/arch/x86/include/asm/page_types.h @@ -0,0 +1,77 @@ +#ifndef _ASM_X86_PAGE_DEFS_H +#define _ASM_X86_PAGE_DEFS_H + +#include <linux/const.h> + +/* PAGE_SHIFT determines the page size */ +#define PAGE_SHIFT 12 +#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) +#define PAGE_MASK (~(PAGE_SIZE-1)) + +#define __PHYSICAL_MASK ((phys_addr_t)(1ULL << __PHYSICAL_MASK_SHIFT) - 1) +#define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1) + +/* Cast PAGE_MASK to a signed type so that it is sign-extended if + virtual addresses are 32-bits but physical addresses are larger + (ie, 32-bit PAE). */ +#define PHYSICAL_PAGE_MASK (((signed long)PAGE_MASK) & __PHYSICAL_MASK) + +/* PTE_PFN_MASK extracts the PFN from a (pte|pmd|pud|pgd)val_t */ +#define PTE_PFN_MASK ((pteval_t)PHYSICAL_PAGE_MASK) + +/* PTE_FLAGS_MASK extracts the flags from a (pte|pmd|pud|pgd)val_t */ +#define PTE_FLAGS_MASK (~PTE_PFN_MASK) + +#define PMD_PAGE_SIZE (_AC(1, UL) << PMD_SHIFT) +#define PMD_PAGE_MASK (~(PMD_PAGE_SIZE-1)) + +#define HPAGE_SHIFT PMD_SHIFT +#define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT) +#define HPAGE_MASK (~(HPAGE_SIZE - 1)) +#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) + +#define HUGE_MAX_HSTATE 2 + +#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) + +#define VM_DATA_DEFAULT_FLAGS \ + (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \ + VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) + +#ifdef CONFIG_X86_64 +#include <asm/page_64_types.h> +#else +#include <asm/page_32_types.h> +#endif /* CONFIG_X86_64 */ + +#ifndef __ASSEMBLY__ + +#include <linux/types.h> + +typedef struct { pgdval_t pgd; } pgd_t; +typedef struct { pgprotval_t pgprot; } pgprot_t; + +#if PAGETABLE_LEVELS > 3 +typedef struct { pudval_t pud; } pud_t; +#endif + +#if PAGETABLE_LEVELS > 2 +typedef struct { pmdval_t pmd; } pmd_t; +#endif + +typedef struct page *pgtable_t; + +extern int page_is_ram(unsigned long pagenr); +extern int pagerange_is_ram(unsigned long start, unsigned long end); +extern int devmem_is_allowed(unsigned long pagenr); +extern void map_devmem(unsigned long pfn, unsigned long size, + pgprot_t vma_prot); +extern void unmap_devmem(unsigned long pfn, unsigned long size, + pgprot_t vma_prot); + +extern unsigned long max_low_pfn_mapped; +extern unsigned long max_pfn_mapped; + +#endif /* !__ASSEMBLY__ */ + +#endif /* _ASM_X86_PAGE_DEFS_H */ |