pgalloc.h

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#ifndef _ASM_SCORE_PGALLOC_H
#define _ASM_SCORE_PGALLOC_H

#include <linux/mm.h>

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 pgd_t *pgd_alloc(struct mm_struct *mm)
{
    pgd_t *ret, *init;

    ret = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ORDER);
    if (ret) {
        init = pgd_offset(&init_mm, 0UL);
        pgd_init((unsigned long)ret);
        memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
        (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
    }

    return ret;
}

static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
{
    free_pages((unsigned long)pgd, PGD_ORDER);
}

static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
    unsigned long address)
{
    pte_t *pte;

    pte = (pte_t *) __get_free_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO,
                    PTE_ORDER);

    return pte;
}

static inline struct page *pte_alloc_one(struct mm_struct *mm,
    unsigned long address)
{
    struct page *pte;

    pte = alloc_pages(GFP_KERNEL | __GFP_REPEAT, PTE_ORDER);
    if (pte) {
        clear_highpage(pte);
        pgtable_page_ctor(pte);
    }
    return pte;
}

static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
{
    free_pages((unsigned long)pte, PTE_ORDER);
}

static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
{
    pgtable_page_dtor(pte);
    __free_pages(pte, PTE_ORDER);
}

#define __pte_free_tlb(tlb, pte, buf)           \
do {                            \
    pgtable_page_dtor(pte);             \
    tlb_remove_page((tlb), pte);            \
} while (0)

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

#endif /* _ASM_SCORE_PGALLOC_H */