| /* |
| * This file is subject to the terms and conditions of the GNU General Public |
| * License. See the file "COPYING" in the main directory of this archive |
| * for more details. |
| * |
| * Copyright (C) 2003 Ralf Baechle |
| */ |
| #ifndef _ASM_PGTABLE_H |
| #define _ASM_PGTABLE_H |
| |
| #include <linux/mm_types.h> |
| #include <linux/mmzone.h> |
| #ifdef CONFIG_32BIT |
| #include <asm/pgtable-32.h> |
| #endif |
| #ifdef CONFIG_64BIT |
| #include <asm/pgtable-64.h> |
| #endif |
| |
| #include <asm/cmpxchg.h> |
| #include <asm/io.h> |
| #include <asm/pgtable-bits.h> |
| #include <asm/cpu-features.h> |
| |
| struct mm_struct; |
| struct vm_area_struct; |
| |
| #define PAGE_SHARED vm_get_page_prot(VM_READ|VM_WRITE|VM_SHARED) |
| |
| #define PAGE_KERNEL __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \ |
| _PAGE_GLOBAL | _page_cachable_default) |
| #define PAGE_KERNEL_NC __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \ |
| _PAGE_GLOBAL | _CACHE_CACHABLE_NONCOHERENT) |
| #define PAGE_KERNEL_UNCACHED __pgprot(_PAGE_PRESENT | __READABLE | \ |
| __WRITEABLE | _PAGE_GLOBAL | _CACHE_UNCACHED) |
| |
| /* |
| * If _PAGE_NO_EXEC is not defined, we can't do page protection for |
| * execute, and consider it to be the same as read. Also, write |
| * permissions imply read permissions. This is the closest we can get |
| * by reasonable means.. |
| */ |
| |
| extern unsigned long _page_cachable_default; |
| extern void __update_cache(unsigned long address, pte_t pte); |
| |
| /* |
| * 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 |
| |
| extern void paging_init(void); |
| |
| /* |
| * 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 pmd_phys(pmd) virt_to_phys((void *)pmd_val(pmd)) |
| |
| static inline unsigned long pmd_pfn(pmd_t pmd) |
| { |
| return pmd_val(pmd) >> _PFN_SHIFT; |
| } |
| |
| #ifndef CONFIG_MIPS_HUGE_TLB_SUPPORT |
| #define pmd_page(pmd) (pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT)) |
| #endif /* CONFIG_MIPS_HUGE_TLB_SUPPORT */ |
| |
| #define pmd_page_vaddr(pmd) pmd_val(pmd) |
| |
| #define htw_stop() \ |
| do { \ |
| unsigned long __flags; \ |
| \ |
| if (cpu_has_htw) { \ |
| local_irq_save(__flags); \ |
| if(!raw_current_cpu_data.htw_seq++) { \ |
| write_c0_pwctl(read_c0_pwctl() & \ |
| ~(1 << MIPS_PWCTL_PWEN_SHIFT)); \ |
| back_to_back_c0_hazard(); \ |
| } \ |
| local_irq_restore(__flags); \ |
| } \ |
| } while(0) |
| |
| #define htw_start() \ |
| do { \ |
| unsigned long __flags; \ |
| \ |
| if (cpu_has_htw) { \ |
| local_irq_save(__flags); \ |
| if (!--raw_current_cpu_data.htw_seq) { \ |
| write_c0_pwctl(read_c0_pwctl() | \ |
| (1 << MIPS_PWCTL_PWEN_SHIFT)); \ |
| back_to_back_c0_hazard(); \ |
| } \ |
| local_irq_restore(__flags); \ |
| } \ |
| } while(0) |
| |
| static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, |
| pte_t *ptep, pte_t pteval); |
| |
| #if defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32) |
| |
| #ifdef CONFIG_XPA |
| # define pte_none(pte) (!(((pte).pte_high) & ~_PAGE_GLOBAL)) |
| #else |
| # define pte_none(pte) (!(((pte).pte_low | (pte).pte_high) & ~_PAGE_GLOBAL)) |
| #endif |
| |
| #define pte_present(pte) ((pte).pte_low & _PAGE_PRESENT) |
| #define pte_no_exec(pte) ((pte).pte_low & _PAGE_NO_EXEC) |
| |
| static inline void set_pte(pte_t *ptep, pte_t pte) |
| { |
| ptep->pte_high = pte.pte_high; |
| smp_wmb(); |
| ptep->pte_low = pte.pte_low; |
| |
| #ifdef CONFIG_XPA |
| if (pte.pte_high & _PAGE_GLOBAL) { |
| #else |
| if (pte.pte_low & _PAGE_GLOBAL) { |
| #endif |
| pte_t *buddy = ptep_buddy(ptep); |
| /* |
| * Make sure the buddy is global too (if it's !none, |
| * it better already be global) |
| */ |
| if (pte_none(*buddy)) { |
| if (!IS_ENABLED(CONFIG_XPA)) |
| buddy->pte_low |= _PAGE_GLOBAL; |
| buddy->pte_high |= _PAGE_GLOBAL; |
| } |
| } |
| } |
| |
| static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) |
| { |
| pte_t null = __pte(0); |
| |
| htw_stop(); |
| /* Preserve global status for the pair */ |
| if (IS_ENABLED(CONFIG_XPA)) { |
| if (ptep_buddy(ptep)->pte_high & _PAGE_GLOBAL) |
| null.pte_high = _PAGE_GLOBAL; |
| } else { |
| if (ptep_buddy(ptep)->pte_low & _PAGE_GLOBAL) |
| null.pte_low = null.pte_high = _PAGE_GLOBAL; |
| } |
| |
| set_pte_at(mm, addr, ptep, null); |
| htw_start(); |
| } |
| #else |
| |
| #define pte_none(pte) (!(pte_val(pte) & ~_PAGE_GLOBAL)) |
| #define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT) |
| #define pte_no_exec(pte) (pte_val(pte) & _PAGE_NO_EXEC) |
| |
| /* |
| * Certain architectures need to do special things when pte's |
| * within a page table are directly modified. Thus, the following |
| * hook is made available. |
| */ |
| static inline void set_pte(pte_t *ptep, pte_t pteval) |
| { |
| *ptep = pteval; |
| #if !defined(CONFIG_CPU_R3K_TLB) |
| 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) |
| */ |
| # if defined(CONFIG_PHYS_ADDR_T_64BIT) && !defined(CONFIG_CPU_MIPS32) |
| cmpxchg64(&buddy->pte, 0, _PAGE_GLOBAL); |
| # else |
| cmpxchg(&buddy->pte, 0, _PAGE_GLOBAL); |
| # endif |
| } |
| #endif |
| } |
| |
| static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) |
| { |
| htw_stop(); |
| #if !defined(CONFIG_CPU_R3K_TLB) |
| /* Preserve global status for the pair */ |
| if (pte_val(*ptep_buddy(ptep)) & _PAGE_GLOBAL) |
| set_pte_at(mm, addr, ptep, __pte(_PAGE_GLOBAL)); |
| else |
| #endif |
| set_pte_at(mm, addr, ptep, __pte(0)); |
| htw_start(); |
| } |
| #endif |
| |
| static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, |
| pte_t *ptep, pte_t pteval) |
| { |
| |
| if (!pte_present(pteval)) |
| goto cache_sync_done; |
| |
| if (pte_present(*ptep) && (pte_pfn(*ptep) == pte_pfn(pteval))) |
| goto cache_sync_done; |
| |
| __update_cache(addr, pteval); |
| cache_sync_done: |
| set_pte(ptep, pteval); |
| } |
| |
| /* |
| * (pmds are folded into puds so this doesn't get actually called, |
| * but the define is needed for a generic inline function.) |
| */ |
| #define set_pmd(pmdptr, pmdval) do { *(pmdptr) = (pmdval); } while(0) |
| |
| #ifndef __PAGETABLE_PMD_FOLDED |
| /* |
| * (puds are folded into pgds so this doesn't get actually called, |
| * but the define is needed for a generic inline function.) |
| */ |
| #define set_pud(pudptr, pudval) do { *(pudptr) = (pudval); } while(0) |
| #endif |
| |
| #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) |
| |
| /* |
| * We used to declare this array with size but gcc 3.3 and older are not able |
| * to find that this expression is a constant, so the size is dropped. |
| */ |
| extern pgd_t swapper_pg_dir[]; |
| |
| /* |
| * Platform specific pte_special() and pte_mkspecial() definitions |
| * are required only when ARCH_HAS_PTE_SPECIAL is enabled. |
| */ |
| #if defined(CONFIG_ARCH_HAS_PTE_SPECIAL) |
| #if defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32) |
| static inline int pte_special(pte_t pte) |
| { |
| return pte.pte_low & _PAGE_SPECIAL; |
| } |
| |
| static inline pte_t pte_mkspecial(pte_t pte) |
| { |
| pte.pte_low |= _PAGE_SPECIAL; |
| return pte; |
| } |
| #else |
| 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 |
| #endif /* CONFIG_ARCH_HAS_PTE_SPECIAL */ |
| |
| /* |
| * The following only work if pte_present() is true. |
| * Undefined behaviour if not.. |
| */ |
| #if defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32) |
| static inline int pte_write(pte_t pte) { return pte.pte_low & _PAGE_WRITE; } |
| static inline int pte_dirty(pte_t pte) { return pte.pte_low & _PAGE_MODIFIED; } |
| static inline int pte_young(pte_t pte) { return pte.pte_low & _PAGE_ACCESSED; } |
| |
| static inline pte_t pte_wrprotect(pte_t pte) |
| { |
| pte.pte_low &= ~_PAGE_WRITE; |
| if (!IS_ENABLED(CONFIG_XPA)) |
| pte.pte_low &= ~_PAGE_SILENT_WRITE; |
| pte.pte_high &= ~_PAGE_SILENT_WRITE; |
| return pte; |
| } |
| |
| static inline pte_t pte_mkclean(pte_t pte) |
| { |
| pte.pte_low &= ~_PAGE_MODIFIED; |
| if (!IS_ENABLED(CONFIG_XPA)) |
| pte.pte_low &= ~_PAGE_SILENT_WRITE; |
| pte.pte_high &= ~_PAGE_SILENT_WRITE; |
| return pte; |
| } |
| |
| static inline pte_t pte_mkold(pte_t pte) |
| { |
| pte.pte_low &= ~_PAGE_ACCESSED; |
| if (!IS_ENABLED(CONFIG_XPA)) |
| pte.pte_low &= ~_PAGE_SILENT_READ; |
| pte.pte_high &= ~_PAGE_SILENT_READ; |
| return pte; |
| } |
| |
| static inline pte_t pte_mkwrite(pte_t pte) |
| { |
| pte.pte_low |= _PAGE_WRITE; |
| if (pte.pte_low & _PAGE_MODIFIED) { |
| if (!IS_ENABLED(CONFIG_XPA)) |
| pte.pte_low |= _PAGE_SILENT_WRITE; |
| pte.pte_high |= _PAGE_SILENT_WRITE; |
| } |
| return pte; |
| } |
| |
| static inline pte_t pte_mkdirty(pte_t pte) |
| { |
| pte.pte_low |= _PAGE_MODIFIED; |
| if (pte.pte_low & _PAGE_WRITE) { |
| if (!IS_ENABLED(CONFIG_XPA)) |
| pte.pte_low |= _PAGE_SILENT_WRITE; |
| pte.pte_high |= _PAGE_SILENT_WRITE; |
| } |
| return pte; |
| } |
| |
| static inline pte_t pte_mkyoung(pte_t pte) |
| { |
| pte.pte_low |= _PAGE_ACCESSED; |
| if (!(pte.pte_low & _PAGE_NO_READ)) { |
| if (!IS_ENABLED(CONFIG_XPA)) |
| pte.pte_low |= _PAGE_SILENT_READ; |
| pte.pte_high |= _PAGE_SILENT_READ; |
| } |
| return pte; |
| } |
| #else |
| static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_WRITE; } |
| static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_MODIFIED; } |
| static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; } |
| |
| static inline pte_t pte_wrprotect(pte_t pte) |
| { |
| pte_val(pte) &= ~(_PAGE_WRITE | _PAGE_SILENT_WRITE); |
| return pte; |
| } |
| |
| static inline pte_t pte_mkclean(pte_t pte) |
| { |
| pte_val(pte) &= ~(_PAGE_MODIFIED | _PAGE_SILENT_WRITE); |
| return pte; |
| } |
| |
| static inline pte_t pte_mkold(pte_t pte) |
| { |
| pte_val(pte) &= ~(_PAGE_ACCESSED | _PAGE_SILENT_READ); |
| 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_SILENT_WRITE; |
| return pte; |
| } |
| |
| static inline pte_t pte_mkdirty(pte_t pte) |
| { |
| pte_val(pte) |= _PAGE_MODIFIED | _PAGE_SOFT_DIRTY; |
| if (pte_val(pte) & _PAGE_WRITE) |
| pte_val(pte) |= _PAGE_SILENT_WRITE; |
| return pte; |
| } |
| |
| static inline pte_t pte_mkyoung(pte_t pte) |
| { |
| pte_val(pte) |= _PAGE_ACCESSED; |
| if (!(pte_val(pte) & _PAGE_NO_READ)) |
| pte_val(pte) |= _PAGE_SILENT_READ; |
| return pte; |
| } |
| |
| #define pte_sw_mkyoung pte_mkyoung |
| |
| #ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT |
| 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; |
| } |
| |
| #define pmd_write pmd_write |
| static inline int pmd_write(pmd_t pmd) |
| { |
| return !!(pmd_val(pmd) & _PAGE_WRITE); |
| } |
| |
| static inline struct page *pmd_page(pmd_t pmd) |
| { |
| if (pmd_val(pmd) & _PAGE_HUGE) |
| return pfn_to_page(pmd_pfn(pmd)); |
| |
| return pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT); |
| } |
| #endif /* CONFIG_MIPS_HUGE_TLB_SUPPORT */ |
| |
| #ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY |
| static inline bool pte_soft_dirty(pte_t pte) |
| { |
| return pte_val(pte) & _PAGE_SOFT_DIRTY; |
| } |
| #define pte_swp_soft_dirty pte_soft_dirty |
| |
| static inline pte_t pte_mksoft_dirty(pte_t pte) |
| { |
| pte_val(pte) |= _PAGE_SOFT_DIRTY; |
| return pte; |
| } |
| #define pte_swp_mksoft_dirty pte_mksoft_dirty |
| |
| static inline pte_t pte_clear_soft_dirty(pte_t pte) |
| { |
| pte_val(pte) &= ~(_PAGE_SOFT_DIRTY); |
| return pte; |
| } |
| #define pte_swp_clear_soft_dirty pte_clear_soft_dirty |
| |
| #endif /* CONFIG_HAVE_ARCH_SOFT_DIRTY */ |
| |
| #endif |
| |
| /* |
| * Macro to make mark a page protection value as "uncacheable". Note |
| * that "protection" is really a misnomer here as the protection value |
| * contains the memory attribute bits, dirty bits, and various other |
| * bits as well. |
| */ |
| #define pgprot_noncached pgprot_noncached |
| |
| static inline pgprot_t pgprot_noncached(pgprot_t _prot) |
| { |
| unsigned long prot = pgprot_val(_prot); |
| |
| prot = (prot & ~_CACHE_MASK) | _CACHE_UNCACHED; |
| |
| return __pgprot(prot); |
| } |
| |
| #define pgprot_writecombine pgprot_writecombine |
| |
| static inline pgprot_t pgprot_writecombine(pgprot_t _prot) |
| { |
| unsigned long prot = pgprot_val(_prot); |
| |
| /* cpu_data[0].writecombine is already shifted by _CACHE_SHIFT */ |
| prot = (prot & ~_CACHE_MASK) | cpu_data[0].writecombine; |
| |
| return __pgprot(prot); |
| } |
| |
| static inline void flush_tlb_fix_spurious_fault(struct vm_area_struct *vma, |
| unsigned long address, |
| pte_t *ptep) |
| { |
| } |
| |
| #define __HAVE_ARCH_PTE_SAME |
| static inline int pte_same(pte_t pte_a, pte_t pte_b) |
| { |
| return pte_val(pte_a) == pte_val(pte_b); |
| } |
| |
| #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS |
| static inline int ptep_set_access_flags(struct vm_area_struct *vma, |
| unsigned long address, pte_t *ptep, |
| pte_t entry, int dirty) |
| { |
| if (!pte_same(*ptep, entry)) |
| set_pte_at(vma->vm_mm, address, ptep, entry); |
| /* |
| * update_mmu_cache will unconditionally execute, handling both |
| * the case that the PTE changed and the spurious fault case. |
| */ |
| return true; |
| } |
| |
| /* |
| * 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)) |
| |
| #if defined(CONFIG_XPA) |
| static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
| { |
| pte.pte_low &= (_PAGE_MODIFIED | _PAGE_ACCESSED | _PFNX_MASK); |
| pte.pte_high &= (_PFN_MASK | _CACHE_MASK); |
| pte.pte_low |= pgprot_val(newprot) & ~_PFNX_MASK; |
| pte.pte_high |= pgprot_val(newprot) & ~(_PFN_MASK | _CACHE_MASK); |
| return pte; |
| } |
| #elif defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32) |
| static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
| { |
| pte.pte_low &= _PAGE_CHG_MASK; |
| pte.pte_high &= (_PFN_MASK | _CACHE_MASK); |
| pte.pte_low |= pgprot_val(newprot); |
| pte.pte_high |= pgprot_val(newprot) & ~(_PFN_MASK | _CACHE_MASK); |
| return pte; |
| } |
| #else |
| static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
| { |
| pte_val(pte) &= _PAGE_CHG_MASK; |
| pte_val(pte) |= pgprot_val(newprot) & ~_PAGE_CHG_MASK; |
| if ((pte_val(pte) & _PAGE_ACCESSED) && !(pte_val(pte) & _PAGE_NO_READ)) |
| pte_val(pte) |= _PAGE_SILENT_READ; |
| return pte; |
| } |
| #endif |
| |
| #if defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32) |
| static inline int pte_swp_exclusive(pte_t pte) |
| { |
| return pte.pte_low & _PAGE_SWP_EXCLUSIVE; |
| } |
| |
| static inline pte_t pte_swp_mkexclusive(pte_t pte) |
| { |
| pte.pte_low |= _PAGE_SWP_EXCLUSIVE; |
| return pte; |
| } |
| |
| static inline pte_t pte_swp_clear_exclusive(pte_t pte) |
| { |
| pte.pte_low &= ~_PAGE_SWP_EXCLUSIVE; |
| return pte; |
| } |
| #else |
| 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; |
| } |
| #endif |
| |
| extern void __update_tlb(struct vm_area_struct *vma, unsigned long address, |
| pte_t pte); |
| |
| static inline void update_mmu_cache(struct vm_area_struct *vma, |
| unsigned long address, pte_t *ptep) |
| { |
| pte_t pte = *ptep; |
| __update_tlb(vma, address, pte); |
| } |
| |
| #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) |
| { |
| pte_t pte = *(pte_t *)pmdp; |
| |
| __update_tlb(vma, address, pte); |
| } |
| |
| /* |
| * Allow physical addresses to be fixed up to help 36-bit peripherals. |
| */ |
| #ifdef CONFIG_MIPS_FIXUP_BIGPHYS_ADDR |
| phys_addr_t fixup_bigphys_addr(phys_addr_t addr, phys_addr_t size); |
| int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long vaddr, |
| unsigned long pfn, unsigned long size, pgprot_t prot); |
| #define io_remap_pfn_range io_remap_pfn_range |
| #else |
| #define fixup_bigphys_addr(addr, size) (addr) |
| #endif /* CONFIG_MIPS_FIXUP_BIGPHYS_ADDR */ |
| |
| #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
| |
| /* We don't have hardware dirty/accessed bits, generic_pmdp_establish is fine.*/ |
| #define pmdp_establish generic_pmdp_establish |
| |
| #define has_transparent_hugepage has_transparent_hugepage |
| extern int has_transparent_hugepage(void); |
| |
| static inline int pmd_trans_huge(pmd_t pmd) |
| { |
| return !!(pmd_val(pmd) & _PAGE_HUGE); |
| } |
| |
| static inline pmd_t pmd_mkhuge(pmd_t pmd) |
| { |
| pmd_val(pmd) |= _PAGE_HUGE; |
| |
| return pmd; |
| } |
| |
| extern void set_pmd_at(struct mm_struct *mm, unsigned long addr, |
| pmd_t *pmdp, pmd_t pmd); |
| |
| static inline pmd_t pmd_wrprotect(pmd_t pmd) |
| { |
| pmd_val(pmd) &= ~(_PAGE_WRITE | _PAGE_SILENT_WRITE); |
| return pmd; |
| } |
| |
| static inline pmd_t pmd_mkwrite(pmd_t pmd) |
| { |
| pmd_val(pmd) |= _PAGE_WRITE; |
| if (pmd_val(pmd) & _PAGE_MODIFIED) |
| pmd_val(pmd) |= _PAGE_SILENT_WRITE; |
| |
| 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_MODIFIED | _PAGE_SILENT_WRITE); |
| return pmd; |
| } |
| |
| static inline pmd_t pmd_mkdirty(pmd_t pmd) |
| { |
| pmd_val(pmd) |= _PAGE_MODIFIED | _PAGE_SOFT_DIRTY; |
| if (pmd_val(pmd) & _PAGE_WRITE) |
| pmd_val(pmd) |= _PAGE_SILENT_WRITE; |
| |
| 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|_PAGE_SILENT_READ); |
| |
| return pmd; |
| } |
| |
| static inline pmd_t pmd_mkyoung(pmd_t pmd) |
| { |
| pmd_val(pmd) |= _PAGE_ACCESSED; |
| |
| if (!(pmd_val(pmd) & _PAGE_NO_READ)) |
| pmd_val(pmd) |= _PAGE_SILENT_READ; |
| |
| return pmd; |
| } |
| |
| #ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY |
| static inline int pmd_soft_dirty(pmd_t pmd) |
| { |
| return !!(pmd_val(pmd) & _PAGE_SOFT_DIRTY); |
| } |
| |
| static inline pmd_t pmd_mksoft_dirty(pmd_t pmd) |
| { |
| pmd_val(pmd) |= _PAGE_SOFT_DIRTY; |
| return pmd; |
| } |
| |
| static inline pmd_t pmd_clear_soft_dirty(pmd_t pmd) |
| { |
| pmd_val(pmd) &= ~(_PAGE_SOFT_DIRTY); |
| return pmd; |
| } |
| |
| #endif /* CONFIG_HAVE_ARCH_SOFT_DIRTY */ |
| |
| /* Extern to avoid header file madness */ |
| extern pmd_t mk_pmd(struct page *page, pgprot_t prot); |
| |
| static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot) |
| { |
| pmd_val(pmd) = (pmd_val(pmd) & (_PAGE_CHG_MASK | _PAGE_HUGE)) | |
| (pgprot_val(newprot) & ~_PAGE_CHG_MASK); |
| return pmd; |
| } |
| |
| static inline pmd_t pmd_mkinvalid(pmd_t pmd) |
| { |
| pmd_val(pmd) &= ~(_PAGE_PRESENT | _PAGE_VALID | _PAGE_DIRTY); |
| |
| 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 _PAGE_HUGE |
| #define pmd_leaf(pmd) ((pmd_val(pmd) & _PAGE_HUGE) != 0) |
| #define pud_leaf(pud) ((pud_val(pud) & _PAGE_HUGE) != 0) |
| #endif |
| |
| #define gup_fast_permitted(start, end) (!cpu_has_dc_aliases) |
| |
| /* |
| * 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 /* _ASM_PGTABLE_H */ |
