mcf_pgalloc.h

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#ifndef M68K_MCF_PGALLOC_H
#define M68K_MCF_PGALLOC_H

#include <asm/tlb.h>
#include <asm/tlbflush.h>

extern inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
{
    free_page((unsigned long) pte);
}

extern const char bad_pmd_string[];

extern inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
    unsigned long address)
{
    unsigned long page = __get_free_page(GFP_DMA|__GFP_REPEAT);

    if (!page)
        return NULL;

    memset((void *)page, 0, PAGE_SIZE);
    return (pte_t *) (page);
}

extern inline pmd_t *pmd_alloc_kernel(pgd_t *pgd, unsigned long address)
{
    return (pmd_t *) pgd;
}

#define pmd_alloc_one_fast(mm, address) ({ BUG(); ((pmd_t *)1); })
#define pmd_alloc_one(mm, address)      ({ BUG(); ((pmd_t *)2); })

#define pte_alloc_one_fast(mm, addr) pte_alloc_one(mm, addr)

#define pmd_populate(mm, pmd, page) (pmd_val(*pmd) = \
    (unsigned long)(page_address(page)))

#define pmd_populate_kernel(mm, pmd, pte) (pmd_val(*pmd) = (unsigned long)(pte))

#define pmd_pgtable(pmd) pmd_page(pmd)

static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t page,
                  unsigned long address)
{
    __free_page(page);
}

#define __pmd_free_tlb(tlb, pmd, address) do { } while (0)

static inline struct page *pte_alloc_one(struct mm_struct *mm,
    unsigned long address)
{
    struct page *page = alloc_pages(GFP_DMA|__GFP_REPEAT, 0);
    pte_t *pte;

    if (!page)
        return NULL;

    pte = kmap(page);
    if (pte) {
        clear_page(pte);
        __flush_page_to_ram(pte);
        flush_tlb_kernel_page(pte);
        nocache_page(pte);
    }
    kunmap(page);

    return page;
}

extern inline void pte_free(struct mm_struct *mm, struct page *page)
{
    __free_page(page);
}

/*
 * In our implementation, each pgd entry contains 1 pmd that is never allocated
 * or freed.  pgd_present is always 1, so this should never be called. -NL
 */
#define pmd_free(mm, pmd) BUG()

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

static inline pgd_t *pgd_alloc(struct mm_struct *mm)
{
    pgd_t *new_pgd;

    new_pgd = (pgd_t *)__get_free_page(GFP_DMA | __GFP_NOWARN);
    if (!new_pgd)
        return NULL;
    memcpy(new_pgd, swapper_pg_dir, PAGE_SIZE);
    memset(new_pgd, 0, PAGE_OFFSET >> PGDIR_SHIFT);
    return new_pgd;
}

#define pgd_populate(mm, pmd, pte) BUG()

#endif /* M68K_MCF_PGALLOC_H */