blob: 3104df0a4822fdf766aa8821e3dc17165e5bbc0c [file] [log] [blame]
#ifndef _METAG_PGALLOC_H
#define _METAG_PGALLOC_H
#include <linux/threads.h>
#include <linux/mm.h>
#define pmd_populate_kernel(mm, pmd, pte) \
set_pmd(pmd, __pmd(_PAGE_TABLE | __pa(pte)))
#define pmd_populate(mm, pmd, pte) \
set_pmd(pmd, __pmd(_PAGE_TABLE | page_to_phys(pte)))
#define pmd_pgtable(pmd) pmd_page(pmd)
/*
* Allocate and free page tables.
*/
#ifdef CONFIG_METAG_META21_MMU
static inline void pgd_ctor(pgd_t *pgd)
{
memcpy(pgd + USER_PTRS_PER_PGD,
swapper_pg_dir + USER_PTRS_PER_PGD,
(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
}
#else
#define pgd_ctor(x) do { } while (0)
#endif
static inline pgd_t *pgd_alloc(struct mm_struct *mm)
{
pgd_t *pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL);
if (pgd)
pgd_ctor(pgd);
return pgd;
}
static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
{
free_page((unsigned long)pgd);
}
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
unsigned long address)
{
pte_t *pte = (pte_t *)__get_free_page(GFP_KERNEL | __GFP_REPEAT |
__GFP_ZERO);
return pte;
}
static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
unsigned long address)
{
struct page *pte;
pte = alloc_pages(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO, 0);
if (!pte)
return NULL;
if (!pgtable_page_ctor(pte)) {
__free_page(pte);
return NULL;
}
return pte;
}
static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
{
free_page((unsigned long)pte);
}
static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
{
pgtable_page_dtor(pte);
__free_page(pte);
}
#define __pte_free_tlb(tlb, pte, addr) \
do { \
pgtable_page_dtor(pte); \
tlb_remove_page((tlb), (pte)); \
} while (0)
#define check_pgt_cache() do { } while (0)
#endif