97 lines
2.2 KiB
C
97 lines
2.2 KiB
C
|
#ifndef __ASM_SH_PGALLOC_H
|
||
|
|
#define __ASM_SH_PGALLOC_H
|
||
|
|
|
||
|
|
#include <linux/quicklist.h>
|
||
|
|
#include <asm/page.h>
|
||
|
|
|
||
|
|
#define QUICK_PGD 0 /* We preserve special mappings over free */
|
||
|
|
#define QUICK_PT 1 /* Other page table pages that are zero on free */
|
||
|
|
|
||
|
|
static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
|
||
|
|
pte_t *pte)
|
||
|
|
{
|
||
|
|
set_pmd(pmd, __pmd((unsigned long)pte));
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
|
||
|
|
pgtable_t pte)
|
||
|
|
{
|
||
|
|
set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
|
||
|
|
}
|
||
|
|
#define pmd_pgtable(pmd) pmd_page(pmd)
|
||
|
|
|
||
|
|
static inline void pgd_ctor(void *x)
|
||
|
|
{
|
||
|
|
pgd_t *pgd = x;
|
||
|
|
|
||
|
|
memcpy(pgd + USER_PTRS_PER_PGD,
|
||
|
|
swapper_pg_dir + USER_PTRS_PER_PGD,
|
||
|
|
(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Allocate and free page tables.
|
||
|
|
*/
|
||
|
|
static inline pgd_t *pgd_alloc(struct mm_struct *mm)
|
||
|
|
{
|
||
|
|
return quicklist_alloc(QUICK_PGD, GFP_KERNEL | __GFP_REPEAT, pgd_ctor);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
|
||
|
|
{
|
||
|
|
quicklist_free(QUICK_PGD, NULL, pgd);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
|
||
|
|
unsigned long address)
|
||
|
|
{
|
||
|
|
return quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
|
||
|
|
unsigned long address)
|
||
|
|
{
|
||
|
|
struct page *page;
|
||
|
|
void *pg;
|
||
|
|
|
||
|
|
pg = quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL);
|
||
|
|
if (!pg)
|
||
|
|
return NULL;
|
||
|
|
page = virt_to_page(pg);
|
||
|
|
pgtable_page_ctor(page);
|
||
|
|
return page;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
|
||
|
|
{
|
||
|
|
quicklist_free(QUICK_PT, NULL, pte);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
|
||
|
|
{
|
||
|
|
pgtable_page_dtor(pte);
|
||
|
|
quicklist_free_page(QUICK_PT, NULL, pte);
|
||
|
|
}
|
||
|
|
|
||
|
|
#define __pte_free_tlb(tlb,pte) \
|
||
|
|
do { \
|
||
|
|
pgtable_page_dtor(pte); \
|
||
|
|
tlb_remove_page((tlb), (pte)); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* allocating and freeing a pmd is trivial: the 1-entry pmd is
|
||
|
|
* inside the pgd, so has no extra memory associated with it.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define pmd_free(mm, x) do { } while (0)
|
||
|
|
#define __pmd_free_tlb(tlb,x) do { } while (0)
|
||
|
|
|
||
|
|
static inline void check_pgt_cache(void)
|
||
|
|
{
|
||
|
|
quicklist_trim(QUICK_PGD, NULL, 25, 16);
|
||
|
|
quicklist_trim(QUICK_PT, NULL, 25, 16);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* __ASM_SH_PGALLOC_H */
|