605 lines
15 KiB
C
605 lines
15 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
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*
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* Derived from MIPS:
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* Copyright (C) 1994, 95, 96, 97, 98, 99, 2000, 2003 Ralf Baechle
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* Copyright (C) 1999, 2000, 2001 Silicon Graphics, Inc.
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*/
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#ifndef _ASM_PGTABLE_H
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#define _ASM_PGTABLE_H
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#include <linux/compiler.h>
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#include <asm/addrspace.h>
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#include <asm/page.h>
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#include <asm/pgtable-bits.h>
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#if CONFIG_PGTABLE_LEVELS == 2
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#include <asm-generic/pgtable-nopmd.h>
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#elif CONFIG_PGTABLE_LEVELS == 3
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#include <asm-generic/pgtable-nopud.h>
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#else
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#include <asm-generic/pgtable-nop4d.h>
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#endif
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#if CONFIG_PGTABLE_LEVELS == 2
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#define PGDIR_SHIFT (PAGE_SHIFT + (PAGE_SHIFT - 3))
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#elif CONFIG_PGTABLE_LEVELS == 3
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#define PMD_SHIFT (PAGE_SHIFT + (PAGE_SHIFT - 3))
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#define PMD_SIZE (1UL << PMD_SHIFT)
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#define PMD_MASK (~(PMD_SIZE-1))
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#define PGDIR_SHIFT (PMD_SHIFT + (PAGE_SHIFT - 3))
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#elif CONFIG_PGTABLE_LEVELS == 4
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#define PMD_SHIFT (PAGE_SHIFT + (PAGE_SHIFT - 3))
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#define PMD_SIZE (1UL << PMD_SHIFT)
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#define PMD_MASK (~(PMD_SIZE-1))
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#define PUD_SHIFT (PMD_SHIFT + (PAGE_SHIFT - 3))
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#define PUD_SIZE (1UL << PUD_SHIFT)
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#define PUD_MASK (~(PUD_SIZE-1))
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#define PGDIR_SHIFT (PUD_SHIFT + (PAGE_SHIFT - 3))
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#endif
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#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
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#define PGDIR_MASK (~(PGDIR_SIZE-1))
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#define VA_BITS (PGDIR_SHIFT + (PAGE_SHIFT - 3))
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#define PTRS_PER_PGD (PAGE_SIZE >> 3)
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#if CONFIG_PGTABLE_LEVELS > 3
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#define PTRS_PER_PUD (PAGE_SIZE >> 3)
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#endif
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#if CONFIG_PGTABLE_LEVELS > 2
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#define PTRS_PER_PMD (PAGE_SIZE >> 3)
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#endif
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#define PTRS_PER_PTE (PAGE_SIZE >> 3)
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#define USER_PTRS_PER_PGD ((TASK_SIZE64 / PGDIR_SIZE)?(TASK_SIZE64 / PGDIR_SIZE):1)
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#ifndef __ASSEMBLY__
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#include <linux/mm_types.h>
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#include <linux/mmzone.h>
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#include <asm/fixmap.h>
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#include <asm/sparsemem.h>
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struct mm_struct;
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struct vm_area_struct;
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/*
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* ZERO_PAGE is a global shared page that is always zero; used
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* for zero-mapped memory areas etc..
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*/
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extern unsigned long empty_zero_page;
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extern unsigned long zero_page_mask;
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#define ZERO_PAGE(vaddr) \
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(virt_to_page((void *)(empty_zero_page + (((unsigned long)(vaddr)) & zero_page_mask))))
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#define __HAVE_COLOR_ZERO_PAGE
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/*
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* TLB refill handlers may also map the vmalloc area into xkvrange.
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* Avoid the first couple of pages so NULL pointer dereferences will
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* still reliably trap.
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*/
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#define MODULES_VADDR (vm_map_base + PCI_IOSIZE + (2 * PAGE_SIZE))
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#define MODULES_END (MODULES_VADDR + SZ_256M)
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#define VMALLOC_START MODULES_END
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#define VMALLOC_END \
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(vm_map_base + \
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min(PTRS_PER_PGD * PTRS_PER_PUD * PTRS_PER_PMD * PTRS_PER_PTE * PAGE_SIZE, (1UL << cpu_vabits)) - PMD_SIZE - VMEMMAP_SIZE)
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#define vmemmap ((struct page *)((VMALLOC_END + PMD_SIZE) & PMD_MASK))
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#define VMEMMAP_END ((unsigned long)vmemmap + VMEMMAP_SIZE - 1)
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#define pte_ERROR(e) \
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pr_err("%s:%d: bad pte %016lx.\n", __FILE__, __LINE__, pte_val(e))
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#ifndef __PAGETABLE_PMD_FOLDED
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#define pmd_ERROR(e) \
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pr_err("%s:%d: bad pmd %016lx.\n", __FILE__, __LINE__, pmd_val(e))
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#endif
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#ifndef __PAGETABLE_PUD_FOLDED
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#define pud_ERROR(e) \
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pr_err("%s:%d: bad pud %016lx.\n", __FILE__, __LINE__, pud_val(e))
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#endif
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#define pgd_ERROR(e) \
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pr_err("%s:%d: bad pgd %016lx.\n", __FILE__, __LINE__, pgd_val(e))
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extern pte_t invalid_pte_table[PTRS_PER_PTE];
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#ifndef __PAGETABLE_PUD_FOLDED
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typedef struct { unsigned long pud; } pud_t;
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#define pud_val(x) ((x).pud)
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#define __pud(x) ((pud_t) { (x) })
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extern pud_t invalid_pud_table[PTRS_PER_PUD];
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/*
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* Empty pgd/p4d entries point to the invalid_pud_table.
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*/
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static inline int p4d_none(p4d_t p4d)
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{
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return p4d_val(p4d) == (unsigned long)invalid_pud_table;
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}
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static inline int p4d_bad(p4d_t p4d)
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{
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return p4d_val(p4d) & ~PAGE_MASK;
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}
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static inline int p4d_present(p4d_t p4d)
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{
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return p4d_val(p4d) != (unsigned long)invalid_pud_table;
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}
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static inline void p4d_clear(p4d_t *p4dp)
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{
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p4d_val(*p4dp) = (unsigned long)invalid_pud_table;
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}
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static inline pud_t *p4d_pgtable(p4d_t p4d)
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{
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return (pud_t *)p4d_val(p4d);
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}
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static inline void set_p4d(p4d_t *p4d, p4d_t p4dval)
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{
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*p4d = p4dval;
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}
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#define p4d_phys(p4d) PHYSADDR(p4d_val(p4d))
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#define p4d_page(p4d) (pfn_to_page(p4d_phys(p4d) >> PAGE_SHIFT))
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#endif
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#ifndef __PAGETABLE_PMD_FOLDED
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typedef struct { unsigned long pmd; } pmd_t;
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#define pmd_val(x) ((x).pmd)
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#define __pmd(x) ((pmd_t) { (x) })
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extern pmd_t invalid_pmd_table[PTRS_PER_PMD];
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/*
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* Empty pud entries point to the invalid_pmd_table.
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*/
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static inline int pud_none(pud_t pud)
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{
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return pud_val(pud) == (unsigned long)invalid_pmd_table;
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}
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static inline int pud_bad(pud_t pud)
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{
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return pud_val(pud) & ~PAGE_MASK;
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}
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static inline int pud_present(pud_t pud)
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{
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return pud_val(pud) != (unsigned long)invalid_pmd_table;
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}
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static inline void pud_clear(pud_t *pudp)
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{
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pud_val(*pudp) = ((unsigned long)invalid_pmd_table);
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}
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static inline pmd_t *pud_pgtable(pud_t pud)
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{
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return (pmd_t *)pud_val(pud);
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}
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#define set_pud(pudptr, pudval) do { *(pudptr) = (pudval); } while (0)
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#define pud_phys(pud) PHYSADDR(pud_val(pud))
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#define pud_page(pud) (pfn_to_page(pud_phys(pud) >> PAGE_SHIFT))
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#endif
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/*
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* Empty pmd entries point to the invalid_pte_table.
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*/
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static inline int pmd_none(pmd_t pmd)
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{
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return pmd_val(pmd) == (unsigned long)invalid_pte_table;
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}
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static inline int pmd_bad(pmd_t pmd)
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{
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return (pmd_val(pmd) & ~PAGE_MASK);
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}
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static inline int pmd_present(pmd_t pmd)
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{
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if (unlikely(pmd_val(pmd) & _PAGE_HUGE))
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return !!(pmd_val(pmd) & (_PAGE_PRESENT | _PAGE_PROTNONE));
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return pmd_val(pmd) != (unsigned long)invalid_pte_table;
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}
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static inline void pmd_clear(pmd_t *pmdp)
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{
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pmd_val(*pmdp) = ((unsigned long)invalid_pte_table);
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}
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#define set_pmd(pmdptr, pmdval) do { *(pmdptr) = (pmdval); } while (0)
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#define pmd_phys(pmd) PHYSADDR(pmd_val(pmd))
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#ifndef CONFIG_TRANSPARENT_HUGEPAGE
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#define pmd_page(pmd) (pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT))
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#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
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#define pmd_page_vaddr(pmd) pmd_val(pmd)
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extern pmd_t mk_pmd(struct page *page, pgprot_t prot);
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extern void set_pmd_at(struct mm_struct *mm, unsigned long addr, pmd_t *pmdp, pmd_t pmd);
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#define pte_page(x) pfn_to_page(pte_pfn(x))
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#define pte_pfn(x) ((unsigned long)(((x).pte & _PFN_MASK) >> _PFN_SHIFT))
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#define pfn_pte(pfn, prot) __pte(((pfn) << _PFN_SHIFT) | pgprot_val(prot))
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#define pfn_pmd(pfn, prot) __pmd(((pfn) << _PFN_SHIFT) | pgprot_val(prot))
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/*
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* Initialize a new pgd / pud / pmd table with invalid pointers.
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*/
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extern void pgd_init(void *addr);
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extern void pud_init(void *addr);
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extern void pmd_init(void *addr);
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/*
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* Encode/decode swap entries and swap PTEs. Swap PTEs are all PTEs that
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* are !pte_none() && !pte_present().
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*
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* Format of swap PTEs:
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*
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* 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
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* 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
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* <--------------------------- offset ---------------------------
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*
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* 3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1
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* 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
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* --------------> E <--- type ---> <---------- zeroes ---------->
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*
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* E is the exclusive marker that is not stored in swap entries.
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* The zero'ed bits include _PAGE_PRESENT and _PAGE_PROTNONE.
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*/
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static inline pte_t mk_swap_pte(unsigned long type, unsigned long offset)
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{ pte_t pte; pte_val(pte) = ((type & 0x7f) << 16) | (offset << 24); return pte; }
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#define __swp_type(x) (((x).val >> 16) & 0x7f)
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#define __swp_offset(x) ((x).val >> 24)
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#define __swp_entry(type, offset) ((swp_entry_t) { pte_val(mk_swap_pte((type), (offset))) })
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#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
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#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
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#define __pmd_to_swp_entry(pmd) ((swp_entry_t) { pmd_val(pmd) })
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#define __swp_entry_to_pmd(x) ((pmd_t) { (x).val | _PAGE_HUGE })
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static inline int pte_swp_exclusive(pte_t pte)
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{
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return pte_val(pte) & _PAGE_SWP_EXCLUSIVE;
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}
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static inline pte_t pte_swp_mkexclusive(pte_t pte)
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{
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pte_val(pte) |= _PAGE_SWP_EXCLUSIVE;
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return pte;
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}
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static inline pte_t pte_swp_clear_exclusive(pte_t pte)
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{
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pte_val(pte) &= ~_PAGE_SWP_EXCLUSIVE;
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return pte;
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}
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extern void paging_init(void);
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#define pte_none(pte) (!(pte_val(pte) & ~_PAGE_GLOBAL))
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#define pte_present(pte) (pte_val(pte) & (_PAGE_PRESENT | _PAGE_PROTNONE))
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#define pte_no_exec(pte) (pte_val(pte) & _PAGE_NO_EXEC)
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static inline void set_pte(pte_t *ptep, pte_t pteval)
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{
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*ptep = pteval;
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if (pte_val(pteval) & _PAGE_GLOBAL) {
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pte_t *buddy = ptep_buddy(ptep);
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/*
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* Make sure the buddy is global too (if it's !none,
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* it better already be global)
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*/
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#ifdef CONFIG_SMP
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/*
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* For SMP, multiple CPUs can race, so we need to do
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* this atomically.
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*/
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unsigned long page_global = _PAGE_GLOBAL;
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unsigned long tmp;
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__asm__ __volatile__ (
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"1:" __LL "%[tmp], %[buddy] \n"
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" bnez %[tmp], 2f \n"
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" or %[tmp], %[tmp], %[global] \n"
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__SC "%[tmp], %[buddy] \n"
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" beqz %[tmp], 1b \n"
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" nop \n"
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"2: \n"
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__WEAK_LLSC_MB
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: [buddy] "+m" (buddy->pte), [tmp] "=&r" (tmp)
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: [global] "r" (page_global));
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#else /* !CONFIG_SMP */
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if (pte_none(*buddy))
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pte_val(*buddy) = pte_val(*buddy) | _PAGE_GLOBAL;
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#endif /* CONFIG_SMP */
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}
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}
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|
|
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 */
|