115 lines
3.5 KiB
C
115 lines
3.5 KiB
C
#ifndef ASM_X86__PGALLOC_H
|
|
#define ASM_X86__PGALLOC_H
|
|
|
|
#include <linux/threads.h>
|
|
#include <linux/mm.h> /* for struct page */
|
|
#include <linux/pagemap.h>
|
|
|
|
static inline int __paravirt_pgd_alloc(struct mm_struct *mm) { return 0; }
|
|
|
|
#ifdef CONFIG_PARAVIRT
|
|
#include <asm/paravirt.h>
|
|
#else
|
|
#define paravirt_pgd_alloc(mm) __paravirt_pgd_alloc(mm)
|
|
static inline void paravirt_pgd_free(struct mm_struct *mm, pgd_t *pgd) {}
|
|
static inline void paravirt_alloc_pte(struct mm_struct *mm, unsigned long pfn) {}
|
|
static inline void paravirt_alloc_pmd(struct mm_struct *mm, unsigned long pfn) {}
|
|
static inline void paravirt_alloc_pmd_clone(unsigned long pfn, unsigned long clonepfn,
|
|
unsigned long start, unsigned long count) {}
|
|
static inline void paravirt_alloc_pud(struct mm_struct *mm, unsigned long pfn) {}
|
|
static inline void paravirt_release_pte(unsigned long pfn) {}
|
|
static inline void paravirt_release_pmd(unsigned long pfn) {}
|
|
static inline void paravirt_release_pud(unsigned long pfn) {}
|
|
#endif
|
|
|
|
/*
|
|
* Allocate and free page tables.
|
|
*/
|
|
extern pgd_t *pgd_alloc(struct mm_struct *);
|
|
extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
|
|
|
|
extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
|
|
extern pgtable_t pte_alloc_one(struct mm_struct *, unsigned long);
|
|
|
|
/* Should really implement gc for free page table pages. This could be
|
|
done with a reference count in struct page. */
|
|
|
|
static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
|
|
{
|
|
BUG_ON((unsigned long)pte & (PAGE_SIZE-1));
|
|
free_page((unsigned long)pte);
|
|
}
|
|
|
|
static inline void pte_free(struct mm_struct *mm, struct page *pte)
|
|
{
|
|
__free_page(pte);
|
|
}
|
|
|
|
extern void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte);
|
|
|
|
static inline void pmd_populate_kernel(struct mm_struct *mm,
|
|
pmd_t *pmd, pte_t *pte)
|
|
{
|
|
paravirt_alloc_pte(mm, __pa(pte) >> PAGE_SHIFT);
|
|
set_pmd(pmd, __pmd(__pa(pte) | _PAGE_TABLE));
|
|
}
|
|
|
|
static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
|
|
struct page *pte)
|
|
{
|
|
unsigned long pfn = page_to_pfn(pte);
|
|
|
|
paravirt_alloc_pte(mm, pfn);
|
|
set_pmd(pmd, __pmd(((pteval_t)pfn << PAGE_SHIFT) | _PAGE_TABLE));
|
|
}
|
|
|
|
#define pmd_pgtable(pmd) pmd_page(pmd)
|
|
|
|
#if PAGETABLE_LEVELS > 2
|
|
static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
|
|
{
|
|
return (pmd_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
|
|
}
|
|
|
|
static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
|
|
{
|
|
BUG_ON((unsigned long)pmd & (PAGE_SIZE-1));
|
|
free_page((unsigned long)pmd);
|
|
}
|
|
|
|
extern void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd);
|
|
|
|
#ifdef CONFIG_X86_PAE
|
|
extern void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd);
|
|
#else /* !CONFIG_X86_PAE */
|
|
static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
|
|
{
|
|
paravirt_alloc_pmd(mm, __pa(pmd) >> PAGE_SHIFT);
|
|
set_pud(pud, __pud(_PAGE_TABLE | __pa(pmd)));
|
|
}
|
|
#endif /* CONFIG_X86_PAE */
|
|
|
|
#if PAGETABLE_LEVELS > 3
|
|
static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud)
|
|
{
|
|
paravirt_alloc_pud(mm, __pa(pud) >> PAGE_SHIFT);
|
|
set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(pud)));
|
|
}
|
|
|
|
static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
|
|
{
|
|
return (pud_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
|
|
}
|
|
|
|
static inline void pud_free(struct mm_struct *mm, pud_t *pud)
|
|
{
|
|
BUG_ON((unsigned long)pud & (PAGE_SIZE-1));
|
|
free_page((unsigned long)pud);
|
|
}
|
|
|
|
extern void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud);
|
|
#endif /* PAGETABLE_LEVELS > 3 */
|
|
#endif /* PAGETABLE_LEVELS > 2 */
|
|
|
|
#endif /* ASM_X86__PGALLOC_H */
|