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#ifndef _OR32_PGALLOC_H

#define _OR32_PGALLOC_H

#include <asm/page.h>

#include <linux/threads.h>

extern struct pgtable_cache_struct {

        unsigned long *pgd_cache;

        unsigned long *pte_cache;

        unsigned long pgtable_cache_sz;

} quicklists;

#define pgd_quicklist           (quicklists.pgd_cache)

#define pmd_quicklist           ((unsigned long *)0)

#define pte_quicklist           (quicklists.pte_cache)

#define pgtable_cache_size      (quicklists.pgtable_cache_sz)

#define pmd_populate(mm, pmd, pte) \

                set_pmd(pmd, __pmd(__pa(pte)))

/*

 * Allocate and free page tables.

 */

extern __inline__ pgd_t *get_pgd_slow(void)

{

        pgd_t *ret = (pgd_t *)__get_free_page(GFP_KERNEL);

        if (ret) {

                memset(ret, 0, USER_PTRS_PER_PGD * sizeof(pgd_t));

                memcpy(ret + USER_PTRS_PER_PGD, swapper_pg_dir + USER_PTRS_PER_PGD,

                       (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));

        }

        return ret;

}

extern __inline__ void free_pgd_slow(pgd_t *pgd)

{

        free_page((unsigned long)pgd);

}

extern __inline__ pgd_t *get_pgd_fast(void)

{

        unsigned long *ret;

        if ((ret = pgd_quicklist) != NULL) {

                pgd_quicklist = (unsigned long *)(*ret);

                ret[0] = 0;

                pgtable_cache_size--;

        } else

                ret = (unsigned long *)get_pgd_slow();

        return (pgd_t *)ret;

}

extern __inline__ void free_pgd_fast(pgd_t *pgd)

{

        *(unsigned long *)pgd = (unsigned long) pgd_quicklist;

        pgd_quicklist = (unsigned long *) pgd;

        pgtable_cache_size++;

}

static inline pte_t *pte_alloc_one(struct mm_struct *mm, unsigned long address)

{

        pte_t *pte;

        pte = (pte_t *) __get_free_page(GFP_KERNEL);

        if (pte)

                clear_page(pte);

        return pte;

}

static inline pte_t *pte_alloc_one_fast(struct mm_struct *mm, unsigned long address)

{

        unsigned long *ret;

        if((ret = (unsigned long *)pte_quicklist) != NULL) {

                pte_quicklist = (unsigned long *)(*ret);

                ret[0] = ret[1];

                pgtable_cache_size--;

        }

        return (pte_t *)ret;

}

static __inline__ void pte_free_fast(pte_t *pte)

{

        *(unsigned long *)pte = (unsigned long) pte_quicklist;

        pte_quicklist = (unsigned long *) pte;

        pgtable_cache_size++;

}

static __inline__ void pte_free_slow(pte_t *pte)

{

        free_page((unsigned long)pte);

}

#define pte_free(pte)      pte_free_slow(pte)

#define pgd_free(pgd)      free_pgd_slow(pgd)

#define pgd_alloc(mm)      get_pgd_fast()

/*

 * We don't have any real pmd's, and this code never triggers because

 * the pgd will always be present..

 */

#define pmd_alloc_one_fast(mm, addr)    ({ BUG(); ((pmd_t *)1); })

#define pmd_alloc_one(mm, addr)         ({ BUG(); ((pmd_t *)2); })

#define pmd_free_slow(x)                do { } while (0)

#define pmd_free_fast(x)                do { } while (0)

#define pmd_free(x)                     do { } while (0)

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

/* other stuff */

extern int do_check_pgt_cache(int, int);

#endif