| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * Copyright (C) 2020-2022 Loongson Technology Corporation Limited |
| * |
| * Derived from MIPS: |
| * Copyright (C) 1994, 95, 96, 97, 98, 99, 2000, 2003 Ralf Baechle |
| * Copyright (C) 1999, 2000, 2001 Silicon Graphics, Inc. |
| */ |
| #ifndef _ASM_PGTABLE_H |
| #define _ASM_PGTABLE_H |
| |
| #include <linux/compiler.h> |
| #include <asm/addrspace.h> |
| #include <asm/page.h> |
| #include <asm/pgtable-bits.h> |
| |
| #if CONFIG_PGTABLE_LEVELS == 2 |
| #include <asm-generic/pgtable-nopmd.h> |
| #elif CONFIG_PGTABLE_LEVELS == 3 |
| #include <asm-generic/pgtable-nopud.h> |
| #else |
| #include <asm-generic/pgtable-nop4d.h> |
| #endif |
| |
| #if CONFIG_PGTABLE_LEVELS == 2 |
| #define PGDIR_SHIFT (PAGE_SHIFT + (PAGE_SHIFT - 3)) |
| #elif CONFIG_PGTABLE_LEVELS == 3 |
| #define PMD_SHIFT (PAGE_SHIFT + (PAGE_SHIFT - 3)) |
| #define PMD_SIZE (1UL << PMD_SHIFT) |
| #define PMD_MASK (~(PMD_SIZE-1)) |
| #define PGDIR_SHIFT (PMD_SHIFT + (PAGE_SHIFT - 3)) |
| #elif CONFIG_PGTABLE_LEVELS == 4 |
| #define PMD_SHIFT (PAGE_SHIFT + (PAGE_SHIFT - 3)) |
| #define PMD_SIZE (1UL << PMD_SHIFT) |
| #define PMD_MASK (~(PMD_SIZE-1)) |
| #define PUD_SHIFT (PMD_SHIFT + (PAGE_SHIFT - 3)) |
| #define PUD_SIZE (1UL << PUD_SHIFT) |
| #define PUD_MASK (~(PUD_SIZE-1)) |
| #define PGDIR_SHIFT (PUD_SHIFT + (PAGE_SHIFT - 3)) |
| #endif |
| |
| #define PGDIR_SIZE (1UL << PGDIR_SHIFT) |
| #define PGDIR_MASK (~(PGDIR_SIZE-1)) |
| |
| #define VA_BITS (PGDIR_SHIFT + (PAGE_SHIFT - 3)) |
| |
| #define PTRS_PER_PGD (PAGE_SIZE >> 3) |
| #if CONFIG_PGTABLE_LEVELS > 3 |
| #define PTRS_PER_PUD (PAGE_SIZE >> 3) |
| #endif |
| #if CONFIG_PGTABLE_LEVELS > 2 |
| #define PTRS_PER_PMD (PAGE_SIZE >> 3) |
| #endif |
| #define PTRS_PER_PTE (PAGE_SIZE >> 3) |
| |
| #define USER_PTRS_PER_PGD ((TASK_SIZE64 / PGDIR_SIZE)?(TASK_SIZE64 / PGDIR_SIZE):1) |
| |
| #ifndef __ASSEMBLY__ |
| |
| #include <linux/mm_types.h> |
| #include <linux/mmzone.h> |
| #include <asm/fixmap.h> |
| #include <asm/sparsemem.h> |
| |
| struct mm_struct; |
| struct vm_area_struct; |
| |
| /* |
| * ZERO_PAGE is a global shared page that is always zero; used |
| * for zero-mapped memory areas etc.. |
| */ |
| |
| extern unsigned long empty_zero_page; |
| extern unsigned long zero_page_mask; |
| |
| #define ZERO_PAGE(vaddr) \ |
| (virt_to_page((void *)(empty_zero_page + (((unsigned long)(vaddr)) & zero_page_mask)))) |
| #define __HAVE_COLOR_ZERO_PAGE |
| |
| /* |
| * TLB refill handlers may also map the vmalloc area into xkvrange. |
| * Avoid the first couple of pages so NULL pointer dereferences will |
| * still reliably trap. |
| */ |
| #define MODULES_VADDR (vm_map_base + PCI_IOSIZE + (2 * PAGE_SIZE)) |
| #define MODULES_END (MODULES_VADDR + SZ_256M) |
| |
| #define VMALLOC_START MODULES_END |
| #define VMALLOC_END \ |
| (vm_map_base + \ |
| min(PTRS_PER_PGD * PTRS_PER_PUD * PTRS_PER_PMD * PTRS_PER_PTE * PAGE_SIZE, (1UL << cpu_vabits)) - PMD_SIZE - VMEMMAP_SIZE) |
| |
| #define vmemmap ((struct page *)((VMALLOC_END + PMD_SIZE) & PMD_MASK)) |
| #define VMEMMAP_END ((unsigned long)vmemmap + VMEMMAP_SIZE - 1) |
| |
| #define pte_ERROR(e) \ |
| pr_err("%s:%d: bad pte %016lx.\n", __FILE__, __LINE__, pte_val(e)) |
| #ifndef __PAGETABLE_PMD_FOLDED |
| #define pmd_ERROR(e) \ |
| pr_err("%s:%d: bad pmd %016lx.\n", __FILE__, __LINE__, pmd_val(e)) |
| #endif |
| #ifndef __PAGETABLE_PUD_FOLDED |
| #define pud_ERROR(e) \ |
| pr_err("%s:%d: bad pud %016lx.\n", __FILE__, __LINE__, pud_val(e)) |
| #endif |
| #define pgd_ERROR(e) \ |
| pr_err("%s:%d: bad pgd %016lx.\n", __FILE__, __LINE__, pgd_val(e)) |
| |
| extern pte_t invalid_pte_table[PTRS_PER_PTE]; |
| |
| #ifndef __PAGETABLE_PUD_FOLDED |
| |
| typedef struct { unsigned long pud; } pud_t; |
| #define pud_val(x) ((x).pud) |
| #define __pud(x) ((pud_t) { (x) }) |
| |
| extern pud_t invalid_pud_table[PTRS_PER_PUD]; |
| |
| /* |
| * Empty pgd/p4d entries point to the invalid_pud_table. |
| */ |
| static inline int p4d_none(p4d_t p4d) |
| { |
| return p4d_val(p4d) == (unsigned long)invalid_pud_table; |
| } |
| |
| static inline int p4d_bad(p4d_t p4d) |
| { |
| return p4d_val(p4d) & ~PAGE_MASK; |
| } |
| |
| static inline int p4d_present(p4d_t p4d) |
| { |
| return p4d_val(p4d) != (unsigned long)invalid_pud_table; |
| } |
| |
| static inline void p4d_clear(p4d_t *p4dp) |
| { |
| p4d_val(*p4dp) = (unsigned long)invalid_pud_table; |
| } |
| |
| static inline pud_t *p4d_pgtable(p4d_t p4d) |
| { |
| return (pud_t *)p4d_val(p4d); |
| } |
| |
| static inline void set_p4d(p4d_t *p4d, p4d_t p4dval) |
| { |
| *p4d = p4dval; |
| } |
| |
| #define p4d_phys(p4d) PHYSADDR(p4d_val(p4d)) |
| #define p4d_page(p4d) (pfn_to_page(p4d_phys(p4d) >> PAGE_SHIFT)) |
| |
| #endif |
| |
| #ifndef __PAGETABLE_PMD_FOLDED |
| |
| typedef struct { unsigned long pmd; } pmd_t; |
| #define pmd_val(x) ((x).pmd) |
| #define __pmd(x) ((pmd_t) { (x) }) |
| |
| extern pmd_t invalid_pmd_table[PTRS_PER_PMD]; |
| |
| /* |
| * Empty pud entries point to the invalid_pmd_table. |
| */ |
| static inline int pud_none(pud_t pud) |
| { |
| return pud_val(pud) == (unsigned long)invalid_pmd_table; |
| } |
| |
| static inline int pud_bad(pud_t pud) |
| { |
| return pud_val(pud) & ~PAGE_MASK; |
| } |
| |
| static inline int pud_present(pud_t pud) |
| { |
| return pud_val(pud) != (unsigned long)invalid_pmd_table; |
| } |
| |
| static inline void pud_clear(pud_t *pudp) |
| { |
| pud_val(*pudp) = ((unsigned long)invalid_pmd_table); |
| } |
| |
| static inline pmd_t *pud_pgtable(pud_t pud) |
| { |
| return (pmd_t *)pud_val(pud); |
| } |
| |
| #define set_pud(pudptr, pudval) do { *(pudptr) = (pudval); } while (0) |
| |
| #define pud_phys(pud) PHYSADDR(pud_val(pud)) |
| #define pud_page(pud) (pfn_to_page(pud_phys(pud) >> PAGE_SHIFT)) |
| |
| #endif |
| |
| /* |
| * Empty pmd entries point to the invalid_pte_table. |
| */ |
| static inline int pmd_none(pmd_t pmd) |
| { |
| return pmd_val(pmd) == (unsigned long)invalid_pte_table; |
| } |
| |
| static inline int pmd_bad(pmd_t pmd) |
| { |
| return (pmd_val(pmd) & ~PAGE_MASK); |
| } |
| |
| static inline int pmd_present(pmd_t pmd) |
| { |
| if (unlikely(pmd_val(pmd) & _PAGE_HUGE)) |
| return !!(pmd_val(pmd) & (_PAGE_PRESENT | _PAGE_PROTNONE)); |
| |
| return pmd_val(pmd) != (unsigned long)invalid_pte_table; |
| } |
| |
| static inline void pmd_clear(pmd_t *pmdp) |
| { |
| pmd_val(*pmdp) = ((unsigned long)invalid_pte_table); |
| } |
| |
| #define set_pmd(pmdptr, pmdval) do { *(pmdptr) = (pmdval); } while (0) |
| |
| #define pmd_phys(pmd) PHYSADDR(pmd_val(pmd)) |
| |
| #ifndef CONFIG_TRANSPARENT_HUGEPAGE |
| #define pmd_page(pmd) (pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT)) |
| #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ |
| |
| #define pmd_page_vaddr(pmd) pmd_val(pmd) |
| |
| extern pmd_t mk_pmd(struct page *page, pgprot_t prot); |
| extern void set_pmd_at(struct mm_struct *mm, unsigned long addr, pmd_t *pmdp, pmd_t pmd); |
| |
| #define pte_page(x) pfn_to_page(pte_pfn(x)) |
| #define pte_pfn(x) ((unsigned long)(((x).pte & _PFN_MASK) >> _PFN_SHIFT)) |
| #define pfn_pte(pfn, prot) __pte(((pfn) << _PFN_SHIFT) | pgprot_val(prot)) |
| #define pfn_pmd(pfn, prot) __pmd(((pfn) << _PFN_SHIFT) | pgprot_val(prot)) |
| |
| /* |
| * Initialize a new pgd / pud / pmd table with invalid pointers. |
| */ |
| extern void pgd_init(void *addr); |
| extern void pud_init(void *addr); |
| extern void pmd_init(void *addr); |
| |
| /* |
| * Encode/decode swap entries and swap PTEs. Swap PTEs are all PTEs that |
| * are !pte_none() && !pte_present(). |
| * |
| * Format of swap PTEs: |
| * |
| * 6 6 6 6 5 5 5 5 5 5 5 5 5 5 4 4 4 4 4 4 4 4 4 4 3 3 3 3 3 3 3 3 |
| * 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 |
| * <--------------------------- offset --------------------------- |
| * |
| * 3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 |
| * 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 |
| * --------------> E <--- type ---> <---------- zeroes ----------> |
| * |
| * E is the exclusive marker that is not stored in swap entries. |
| * The zero'ed bits include _PAGE_PRESENT and _PAGE_PROTNONE. |
| */ |
| static inline pte_t mk_swap_pte(unsigned long type, unsigned long offset) |
| { pte_t pte; pte_val(pte) = ((type & 0x7f) << 16) | (offset << 24); return pte; } |
| |
| #define __swp_type(x) (((x).val >> 16) & 0x7f) |
| #define __swp_offset(x) ((x).val >> 24) |
| #define __swp_entry(type, offset) ((swp_entry_t) { pte_val(mk_swap_pte((type), (offset))) }) |
| #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) |
| #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) |
| #define __pmd_to_swp_entry(pmd) ((swp_entry_t) { pmd_val(pmd) }) |
| #define __swp_entry_to_pmd(x) ((pmd_t) { (x).val | _PAGE_HUGE }) |
| |
| static inline int pte_swp_exclusive(pte_t pte) |
| { |
| return pte_val(pte) & _PAGE_SWP_EXCLUSIVE; |
| } |
| |
| static inline pte_t pte_swp_mkexclusive(pte_t pte) |
| { |
| pte_val(pte) |= _PAGE_SWP_EXCLUSIVE; |
| return pte; |
| } |
| |
| static inline pte_t pte_swp_clear_exclusive(pte_t pte) |
| { |
| pte_val(pte) &= ~_PAGE_SWP_EXCLUSIVE; |
| return pte; |
| } |
| |
| extern void paging_init(void); |
| |
| #define pte_none(pte) (!(pte_val(pte) & ~_PAGE_GLOBAL)) |
| #define pte_present(pte) (pte_val(pte) & (_PAGE_PRESENT | _PAGE_PROTNONE)) |
| #define pte_no_exec(pte) (pte_val(pte) & _PAGE_NO_EXEC) |
| |
| static inline void set_pte(pte_t *ptep, pte_t pteval) |
| { |
| *ptep = pteval; |
| if (pte_val(pteval) & _PAGE_GLOBAL) { |
| pte_t *buddy = ptep_buddy(ptep); |
| /* |
| * Make sure the buddy is global too (if it's !none, |
| * it better already be global) |
| */ |
| #ifdef CONFIG_SMP |
| /* |
| * For SMP, multiple CPUs can race, so we need to do |
| * this atomically. |
| */ |
| unsigned long page_global = _PAGE_GLOBAL; |
| unsigned long tmp; |
| |
| __asm__ __volatile__ ( |
| "1:" __LL "%[tmp], %[buddy] \n" |
| " bnez %[tmp], 2f \n" |
| " or %[tmp], %[tmp], %[global] \n" |
| __SC "%[tmp], %[buddy] \n" |
| " beqz %[tmp], 1b \n" |
| " nop \n" |
| "2: \n" |
| __WEAK_LLSC_MB |
| : [buddy] "+m" (buddy->pte), [tmp] "=&r" (tmp) |
| : [global] "r" (page_global)); |
| #else /* !CONFIG_SMP */ |
| if (pte_none(*buddy)) |
| pte_val(*buddy) = pte_val(*buddy) | _PAGE_GLOBAL; |
| #endif /* CONFIG_SMP */ |
| } |
| } |
| |
| static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, |
| pte_t *ptep, pte_t pteval) |
| { |
| set_pte(ptep, pteval); |
| } |
| |
| static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) |
| { |
| /* Preserve global status for the pair */ |
| if (pte_val(*ptep_buddy(ptep)) & _PAGE_GLOBAL) |
| set_pte_at(mm, addr, ptep, __pte(_PAGE_GLOBAL)); |
| else |
| set_pte_at(mm, addr, ptep, __pte(0)); |
| } |
| |
| #define PGD_T_LOG2 (__builtin_ffs(sizeof(pgd_t)) - 1) |
| #define PMD_T_LOG2 (__builtin_ffs(sizeof(pmd_t)) - 1) |
| #define PTE_T_LOG2 (__builtin_ffs(sizeof(pte_t)) - 1) |
| |
| extern pgd_t swapper_pg_dir[]; |
| extern pgd_t invalid_pg_dir[]; |
| |
| /* |
| * The following only work if pte_present() is true. |
| * Undefined behaviour if not.. |
| */ |
| static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_WRITE; } |
| static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; } |
| static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_MODIFIED; } |
| |
| static inline pte_t pte_mkold(pte_t pte) |
| { |
| pte_val(pte) &= ~_PAGE_ACCESSED; |
| return pte; |
| } |
| |
| static inline pte_t pte_mkyoung(pte_t pte) |
| { |
| pte_val(pte) |= _PAGE_ACCESSED; |
| return pte; |
| } |
| |
| static inline pte_t pte_mkclean(pte_t pte) |
| { |
| pte_val(pte) &= ~(_PAGE_DIRTY | _PAGE_MODIFIED); |
| return pte; |
| } |
| |
| static inline pte_t pte_mkdirty(pte_t pte) |
| { |
| pte_val(pte) |= _PAGE_MODIFIED; |
| if (pte_val(pte) & _PAGE_WRITE) |
| pte_val(pte) |= _PAGE_DIRTY; |
| return pte; |
| } |
| |
| static inline pte_t pte_mkwrite(pte_t pte) |
| { |
| pte_val(pte) |= _PAGE_WRITE; |
| if (pte_val(pte) & _PAGE_MODIFIED) |
| pte_val(pte) |= _PAGE_DIRTY; |
| return pte; |
| } |
| |
| static inline pte_t pte_wrprotect(pte_t pte) |
| { |
| pte_val(pte) &= ~(_PAGE_WRITE | _PAGE_DIRTY); |
| return pte; |
| } |
| |
| static inline int pte_huge(pte_t pte) { return pte_val(pte) & _PAGE_HUGE; } |
| |
| static inline pte_t pte_mkhuge(pte_t pte) |
| { |
| pte_val(pte) |= _PAGE_HUGE; |
| return pte; |
| } |
| |
| #if defined(CONFIG_ARCH_HAS_PTE_SPECIAL) |
| static inline int pte_special(pte_t pte) { return pte_val(pte) & _PAGE_SPECIAL; } |
| static inline pte_t pte_mkspecial(pte_t pte) { pte_val(pte) |= _PAGE_SPECIAL; return pte; } |
| #endif /* CONFIG_ARCH_HAS_PTE_SPECIAL */ |
| |
| #define pte_accessible pte_accessible |
| static inline unsigned long pte_accessible(struct mm_struct *mm, pte_t a) |
| { |
| if (pte_val(a) & _PAGE_PRESENT) |
| return true; |
| |
| if ((pte_val(a) & _PAGE_PROTNONE) && |
| atomic_read(&mm->tlb_flush_pending)) |
| return true; |
| |
| return false; |
| } |
| |
| /* |
| * Conversion functions: convert a page and protection to a page entry, |
| * and a page entry and page directory to the page they refer to. |
| */ |
| #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) |
| |
| static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
| { |
| return __pte((pte_val(pte) & _PAGE_CHG_MASK) | |
| (pgprot_val(newprot) & ~_PAGE_CHG_MASK)); |
| } |
| |
| extern void __update_tlb(struct vm_area_struct *vma, |
| unsigned long address, pte_t *ptep); |
| |
| static inline void update_mmu_cache(struct vm_area_struct *vma, |
| unsigned long address, pte_t *ptep) |
| { |
| __update_tlb(vma, address, ptep); |
| } |
| |
| #define __HAVE_ARCH_UPDATE_MMU_TLB |
| #define update_mmu_tlb update_mmu_cache |
| |
| static inline void update_mmu_cache_pmd(struct vm_area_struct *vma, |
| unsigned long address, pmd_t *pmdp) |
| { |
| __update_tlb(vma, address, (pte_t *)pmdp); |
| } |
| |
| static inline unsigned long pmd_pfn(pmd_t pmd) |
| { |
| return (pmd_val(pmd) & _PFN_MASK) >> _PFN_SHIFT; |
| } |
| |
| #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
| |
| /* We don't have hardware dirty/accessed bits, generic_pmdp_establish is fine.*/ |
| #define pmdp_establish generic_pmdp_establish |
| |
| static inline int pmd_trans_huge(pmd_t pmd) |
| { |
| return !!(pmd_val(pmd) & _PAGE_HUGE) && pmd_present(pmd); |
| } |
| |
| static inline pmd_t pmd_mkhuge(pmd_t pmd) |
| { |
| pmd_val(pmd) = (pmd_val(pmd) & ~(_PAGE_GLOBAL)) | |
| ((pmd_val(pmd) & _PAGE_GLOBAL) << (_PAGE_HGLOBAL_SHIFT - _PAGE_GLOBAL_SHIFT)); |
| pmd_val(pmd) |= _PAGE_HUGE; |
| |
| return pmd; |
| } |
| |
| #define pmd_write pmd_write |
| static inline int pmd_write(pmd_t pmd) |
| { |
| return !!(pmd_val(pmd) & _PAGE_WRITE); |
| } |
| |
| static inline pmd_t pmd_mkwrite(pmd_t pmd) |
| { |
| pmd_val(pmd) |= _PAGE_WRITE; |
| if (pmd_val(pmd) & _PAGE_MODIFIED) |
| pmd_val(pmd) |= _PAGE_DIRTY; |
| return pmd; |
| } |
| |
| static inline pmd_t pmd_wrprotect(pmd_t pmd) |
| { |
| pmd_val(pmd) &= ~(_PAGE_WRITE | _PAGE_DIRTY); |
| return pmd; |
| } |
| |
| static inline int pmd_dirty(pmd_t pmd) |
| { |
| return !!(pmd_val(pmd) & _PAGE_MODIFIED); |
| } |
| |
| static inline pmd_t pmd_mkclean(pmd_t pmd) |
| { |
| pmd_val(pmd) &= ~(_PAGE_DIRTY | _PAGE_MODIFIED); |
| return pmd; |
| } |
| |
| static inline pmd_t pmd_mkdirty(pmd_t pmd) |
| { |
| pmd_val(pmd) |= _PAGE_MODIFIED; |
| if (pmd_val(pmd) & _PAGE_WRITE) |
| pmd_val(pmd) |= _PAGE_DIRTY; |
| return pmd; |
| } |
| |
| #define pmd_young pmd_young |
| static inline int pmd_young(pmd_t pmd) |
| { |
| return !!(pmd_val(pmd) & _PAGE_ACCESSED); |
| } |
| |
| static inline pmd_t pmd_mkold(pmd_t pmd) |
| { |
| pmd_val(pmd) &= ~_PAGE_ACCESSED; |
| return pmd; |
| } |
| |
| static inline pmd_t pmd_mkyoung(pmd_t pmd) |
| { |
| pmd_val(pmd) |= _PAGE_ACCESSED; |
| return pmd; |
| } |
| |
| static inline struct page *pmd_page(pmd_t pmd) |
| { |
| if (pmd_trans_huge(pmd)) |
| return pfn_to_page(pmd_pfn(pmd)); |
| |
| return pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT); |
| } |
| |
| static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot) |
| { |
| pmd_val(pmd) = (pmd_val(pmd) & _HPAGE_CHG_MASK) | |
| (pgprot_val(newprot) & ~_HPAGE_CHG_MASK); |
| return pmd; |
| } |
| |
| static inline pmd_t pmd_mkinvalid(pmd_t pmd) |
| { |
| pmd_val(pmd) &= ~(_PAGE_PRESENT | _PAGE_VALID | _PAGE_DIRTY | _PAGE_PROTNONE); |
| |
| return pmd; |
| } |
| |
| /* |
| * The generic version pmdp_huge_get_and_clear uses a version of pmd_clear() with a |
| * different prototype. |
| */ |
| #define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR |
| static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm, |
| unsigned long address, pmd_t *pmdp) |
| { |
| pmd_t old = *pmdp; |
| |
| pmd_clear(pmdp); |
| |
| return old; |
| } |
| |
| #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ |
| |
| #ifdef CONFIG_NUMA_BALANCING |
| static inline long pte_protnone(pte_t pte) |
| { |
| return (pte_val(pte) & _PAGE_PROTNONE); |
| } |
| |
| static inline long pmd_protnone(pmd_t pmd) |
| { |
| return (pmd_val(pmd) & _PAGE_PROTNONE); |
| } |
| #endif /* CONFIG_NUMA_BALANCING */ |
| |
| /* |
| * We provide our own get_unmapped area to cope with the virtual aliasing |
| * constraints placed on us by the cache architecture. |
| */ |
| #define HAVE_ARCH_UNMAPPED_AREA |
| #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN |
| |
| #endif /* !__ASSEMBLY__ */ |
| |
| #endif /* _ASM_PGTABLE_H */ |