| #ifndef _ASM_X86_PGTABLE_64_H |
| #define _ASM_X86_PGTABLE_64_H |
| |
| #include <linux/const.h> |
| #ifndef __ASSEMBLY__ |
| |
| /* |
| * This file contains the functions and defines necessary to modify and use |
| * the x86-64 page table tree. |
| */ |
| #include <asm/processor.h> |
| #include <linux/bitops.h> |
| #include <linux/threads.h> |
| #include <asm/pda.h> |
| |
| extern pud_t level3_kernel_pgt[512]; |
| extern pud_t level3_ident_pgt[512]; |
| extern pmd_t level2_kernel_pgt[512]; |
| extern pmd_t level2_fixmap_pgt[512]; |
| extern pmd_t level2_ident_pgt[512]; |
| extern pgd_t init_level4_pgt[]; |
| |
| #define swapper_pg_dir init_level4_pgt |
| |
| extern void paging_init(void); |
| |
| #endif /* !__ASSEMBLY__ */ |
| |
| #define SHARED_KERNEL_PMD 0 |
| |
| /* |
| * PGDIR_SHIFT determines what a top-level page table entry can map |
| */ |
| #define PGDIR_SHIFT 39 |
| #define PTRS_PER_PGD 512 |
| |
| /* |
| * 3rd level page |
| */ |
| #define PUD_SHIFT 30 |
| #define PTRS_PER_PUD 512 |
| |
| /* |
| * PMD_SHIFT determines the size of the area a middle-level |
| * page table can map |
| */ |
| #define PMD_SHIFT 21 |
| #define PTRS_PER_PMD 512 |
| |
| /* |
| * entries per page directory level |
| */ |
| #define PTRS_PER_PTE 512 |
| |
| #ifndef __ASSEMBLY__ |
| |
| #define pte_ERROR(e) \ |
| printk("%s:%d: bad pte %p(%016lx).\n", \ |
| __FILE__, __LINE__, &(e), pte_val(e)) |
| #define pmd_ERROR(e) \ |
| printk("%s:%d: bad pmd %p(%016lx).\n", \ |
| __FILE__, __LINE__, &(e), pmd_val(e)) |
| #define pud_ERROR(e) \ |
| printk("%s:%d: bad pud %p(%016lx).\n", \ |
| __FILE__, __LINE__, &(e), pud_val(e)) |
| #define pgd_ERROR(e) \ |
| printk("%s:%d: bad pgd %p(%016lx).\n", \ |
| __FILE__, __LINE__, &(e), pgd_val(e)) |
| |
| #define pgd_none(x) (!pgd_val(x)) |
| #define pud_none(x) (!pud_val(x)) |
| |
| struct mm_struct; |
| |
| void set_pte_vaddr_pud(pud_t *pud_page, unsigned long vaddr, pte_t new_pte); |
| |
| |
| static inline void native_pte_clear(struct mm_struct *mm, unsigned long addr, |
| pte_t *ptep) |
| { |
| *ptep = native_make_pte(0); |
| } |
| |
| static inline void native_set_pte(pte_t *ptep, pte_t pte) |
| { |
| *ptep = pte; |
| } |
| |
| static inline void native_set_pte_atomic(pte_t *ptep, pte_t pte) |
| { |
| native_set_pte(ptep, pte); |
| } |
| |
| static inline pte_t native_ptep_get_and_clear(pte_t *xp) |
| { |
| #ifdef CONFIG_SMP |
| return native_make_pte(xchg(&xp->pte, 0)); |
| #else |
| /* native_local_ptep_get_and_clear, |
| but duplicated because of cyclic dependency */ |
| pte_t ret = *xp; |
| native_pte_clear(NULL, 0, xp); |
| return ret; |
| #endif |
| } |
| |
| static inline void native_set_pmd(pmd_t *pmdp, pmd_t pmd) |
| { |
| *pmdp = pmd; |
| } |
| |
| static inline void native_pmd_clear(pmd_t *pmd) |
| { |
| native_set_pmd(pmd, native_make_pmd(0)); |
| } |
| |
| static inline void native_set_pud(pud_t *pudp, pud_t pud) |
| { |
| *pudp = pud; |
| } |
| |
| static inline void native_pud_clear(pud_t *pud) |
| { |
| native_set_pud(pud, native_make_pud(0)); |
| } |
| |
| static inline void native_set_pgd(pgd_t *pgdp, pgd_t pgd) |
| { |
| *pgdp = pgd; |
| } |
| |
| static inline void native_pgd_clear(pgd_t *pgd) |
| { |
| native_set_pgd(pgd, native_make_pgd(0)); |
| } |
| |
| #define pte_same(a, b) ((a).pte == (b).pte) |
| |
| #endif /* !__ASSEMBLY__ */ |
| |
| #define PMD_SIZE (_AC(1, UL) << PMD_SHIFT) |
| #define PMD_MASK (~(PMD_SIZE - 1)) |
| #define PUD_SIZE (_AC(1, UL) << PUD_SHIFT) |
| #define PUD_MASK (~(PUD_SIZE - 1)) |
| #define PGDIR_SIZE (_AC(1, UL) << PGDIR_SHIFT) |
| #define PGDIR_MASK (~(PGDIR_SIZE - 1)) |
| |
| |
| #define MAXMEM _AC(__AC(1, UL) << MAX_PHYSMEM_BITS, UL) |
| #define VMALLOC_START _AC(0xffffc20000000000, UL) |
| #define VMALLOC_END _AC(0xffffe1ffffffffff, UL) |
| #define VMEMMAP_START _AC(0xffffe20000000000, UL) |
| #define MODULES_VADDR _AC(0xffffffffa0000000, UL) |
| #define MODULES_END _AC(0xffffffffff000000, UL) |
| #define MODULES_LEN (MODULES_END - MODULES_VADDR) |
| |
| #ifndef __ASSEMBLY__ |
| |
| static inline int pgd_bad(pgd_t pgd) |
| { |
| return (pgd_val(pgd) & ~(PTE_PFN_MASK | _PAGE_USER)) != _KERNPG_TABLE; |
| } |
| |
| static inline int pud_bad(pud_t pud) |
| { |
| return (pud_val(pud) & ~(PTE_PFN_MASK | _PAGE_USER)) != _KERNPG_TABLE; |
| } |
| |
| static inline int pmd_bad(pmd_t pmd) |
| { |
| return (pmd_val(pmd) & ~(PTE_PFN_MASK | _PAGE_USER)) != _KERNPG_TABLE; |
| } |
| |
| #define pte_none(x) (!pte_val((x))) |
| #define pte_present(x) (pte_val((x)) & (_PAGE_PRESENT | _PAGE_PROTNONE)) |
| |
| #define pages_to_mb(x) ((x) >> (20 - PAGE_SHIFT)) /* FIXME: is this right? */ |
| |
| /* |
| * Conversion functions: convert a page and protection to a page entry, |
| * and a page entry and page directory to the page they refer to. |
| */ |
| |
| /* |
| * Level 4 access. |
| */ |
| #define pgd_page_vaddr(pgd) \ |
| ((unsigned long)__va((unsigned long)pgd_val((pgd)) & PTE_PFN_MASK)) |
| #define pgd_page(pgd) (pfn_to_page(pgd_val((pgd)) >> PAGE_SHIFT)) |
| #define pgd_present(pgd) (pgd_val(pgd) & _PAGE_PRESENT) |
| static inline int pgd_large(pgd_t pgd) { return 0; } |
| #define mk_kernel_pgd(address) __pgd((address) | _KERNPG_TABLE) |
| |
| /* PUD - Level3 access */ |
| /* to find an entry in a page-table-directory. */ |
| #define pud_page_vaddr(pud) \ |
| ((unsigned long)__va(pud_val((pud)) & PHYSICAL_PAGE_MASK)) |
| #define pud_page(pud) (pfn_to_page(pud_val((pud)) >> PAGE_SHIFT)) |
| #define pud_index(address) (((address) >> PUD_SHIFT) & (PTRS_PER_PUD - 1)) |
| #define pud_offset(pgd, address) \ |
| ((pud_t *)pgd_page_vaddr(*(pgd)) + pud_index((address))) |
| #define pud_present(pud) (pud_val((pud)) & _PAGE_PRESENT) |
| |
| static inline int pud_large(pud_t pte) |
| { |
| return (pud_val(pte) & (_PAGE_PSE | _PAGE_PRESENT)) == |
| (_PAGE_PSE | _PAGE_PRESENT); |
| } |
| |
| /* PMD - Level 2 access */ |
| #define pmd_page_vaddr(pmd) ((unsigned long) __va(pmd_val((pmd)) & PTE_PFN_MASK)) |
| #define pmd_page(pmd) (pfn_to_page(pmd_val((pmd)) >> PAGE_SHIFT)) |
| |
| #define pmd_index(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD - 1)) |
| #define pmd_offset(dir, address) ((pmd_t *)pud_page_vaddr(*(dir)) + \ |
| pmd_index(address)) |
| #define pmd_none(x) (!pmd_val((x))) |
| #define pmd_present(x) (pmd_val((x)) & _PAGE_PRESENT) |
| #define pfn_pmd(nr, prot) (__pmd(((nr) << PAGE_SHIFT) | pgprot_val((prot)))) |
| #define pmd_pfn(x) ((pmd_val((x)) & __PHYSICAL_MASK) >> PAGE_SHIFT) |
| |
| #define pte_to_pgoff(pte) ((pte_val((pte)) & PHYSICAL_PAGE_MASK) >> PAGE_SHIFT) |
| #define pgoff_to_pte(off) ((pte_t) { .pte = ((off) << PAGE_SHIFT) | \ |
| _PAGE_FILE }) |
| #define PTE_FILE_MAX_BITS __PHYSICAL_MASK_SHIFT |
| |
| /* PTE - Level 1 access. */ |
| |
| /* page, protection -> pte */ |
| #define mk_pte(page, pgprot) pfn_pte(page_to_pfn((page)), (pgprot)) |
| |
| #define pte_index(address) (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) |
| #define pte_offset_kernel(dir, address) ((pte_t *) pmd_page_vaddr(*(dir)) + \ |
| pte_index((address))) |
| |
| /* x86-64 always has all page tables mapped. */ |
| #define pte_offset_map(dir, address) pte_offset_kernel((dir), (address)) |
| #define pte_offset_map_nested(dir, address) pte_offset_kernel((dir), (address)) |
| #define pte_unmap(pte) /* NOP */ |
| #define pte_unmap_nested(pte) /* NOP */ |
| |
| #define update_mmu_cache(vma, address, pte) do { } while (0) |
| |
| extern int direct_gbpages; |
| |
| /* Encode and de-code a swap entry */ |
| #if _PAGE_BIT_FILE < _PAGE_BIT_PROTNONE |
| #define SWP_TYPE_BITS (_PAGE_BIT_FILE - _PAGE_BIT_PRESENT - 1) |
| #define SWP_OFFSET_SHIFT (_PAGE_BIT_PROTNONE + 1) |
| #else |
| #define SWP_TYPE_BITS (_PAGE_BIT_PROTNONE - _PAGE_BIT_PRESENT - 1) |
| #define SWP_OFFSET_SHIFT (_PAGE_BIT_FILE + 1) |
| #endif |
| |
| #define MAX_SWAPFILES_CHECK() BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > SWP_TYPE_BITS) |
| |
| #define __swp_type(x) (((x).val >> (_PAGE_BIT_PRESENT + 1)) \ |
| & ((1U << SWP_TYPE_BITS) - 1)) |
| #define __swp_offset(x) ((x).val >> SWP_OFFSET_SHIFT) |
| #define __swp_entry(type, offset) ((swp_entry_t) { \ |
| ((type) << (_PAGE_BIT_PRESENT + 1)) \ |
| | ((offset) << SWP_OFFSET_SHIFT) }) |
| #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val((pte)) }) |
| #define __swp_entry_to_pte(x) ((pte_t) { .pte = (x).val }) |
| |
| extern int kern_addr_valid(unsigned long addr); |
| extern void cleanup_highmap(void); |
| |
| #define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \ |
| remap_pfn_range(vma, vaddr, pfn, size, prot) |
| |
| #define HAVE_ARCH_UNMAPPED_AREA |
| #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN |
| |
| #define pgtable_cache_init() do { } while (0) |
| #define check_pgt_cache() do { } while (0) |
| |
| #define PAGE_AGP PAGE_KERNEL_NOCACHE |
| #define HAVE_PAGE_AGP 1 |
| |
| /* fs/proc/kcore.c */ |
| #define kc_vaddr_to_offset(v) ((v) & __VIRTUAL_MASK) |
| #define kc_offset_to_vaddr(o) \ |
| (((o) & (1UL << (__VIRTUAL_MASK_SHIFT - 1))) \ |
| ? ((o) | ~__VIRTUAL_MASK) \ |
| : (o)) |
| |
| #define __HAVE_ARCH_PTE_SAME |
| #endif /* !__ASSEMBLY__ */ |
| |
| #endif /* _ASM_X86_PGTABLE_64_H */ |