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  >  / usr / src / linux-headers-3.13.0-24 / arch / m32r / include / asm /
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Filename/usr/src/linux-headers-3.13.0-24/arch/m32r/include/asm/pgalloc.h
Size1.8 kb
Permissionrw-r--r--
Ownerroot : root
Create time27-Apr-2025 09:50
Last modified20-Jan-2014 10:40
Last accessed06-Jul-2025 19:40
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#ifndef _ASM_M32R_PGALLOC_H
#define _ASM_M32R_PGALLOC_H

#include <linux/mm.h>

#include <asm/io.h>

#define pmd_populate_kernel(mm, pmd, pte) \
set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte)))

static __inline__ void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
pgtable_t pte)
{
set_pmd(pmd, __pmd(_PAGE_TABLE + page_to_phys(pte)));
}
#define pmd_pgtable(pmd) pmd_page(pmd)

/*
* Allocate and free page tables.
*/
static __inline__ pgd_t *pgd_alloc(struct mm_struct *mm)
{
pgd_t *pgd = (pgd_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO);

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_ZERO);

return pte;
}

static __inline__ pgtable_t pte_alloc_one(struct mm_struct *mm,
unsigned long address)
{
struct page *pte = alloc_page(GFP_KERNEL|__GFP_ZERO);

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) pte_free((tlb)->mm, (pte))

/*
* allocating and freeing a pmd is trivial: the 1-entry pmd is
* inside the pgd, so has no extra memory associated with it.
* (In the PAE case we free the pmds as part of the pgd.)
*/

#define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *)2); })
#define pmd_free(mm, x) do { } while (0)
#define __pmd_free_tlb(tlb, x, addr) do { } while (0)
#define pgd_populate(mm, pmd, pte) BUG()

#define check_pgt_cache() do { } while (0)

#endif /* _ASM_M32R_PGALLOC_H */