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#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 */
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