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#ifndef __ASM_SH64_PGALLOC_H

#define __ASM_SH64_PGALLOC_H

#include <asm/processor.h>

#include <linux/threads.h>

#include <linux/slab.h>

#define pgd_quicklist ((unsigned long *)0)

#define pmd_quicklist ((unsigned long *)0)

#define pte_quicklist ((unsigned long *)0)

#define pgtable_cache_size 0L

/*

#define pmd_populate(mm, pmd, pte) \

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

*/

/*

 * Allocate and free page tables.

 */

static inline pgd_t *pgd_alloc(struct mm_struct *mm)

{

        unsigned int pgd_size = (USER_PTRS_PER_PGD * sizeof(pgd_t));

        pgd_t *pgd = (pgd_t *)kmalloc(pgd_size, GFP_KERNEL);

        if (pgd)

                memset(pgd, 0, pgd_size);

        return pgd;

}

static inline void pgd_free(pgd_t *pgd)

{

        kfree(pgd);

}

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

{

        pte_t *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)

{

        return 0;

}

static inline void pte_free_slow(pte_t *pte)

{

        free_page((unsigned long)pte);

}

#define pte_free(pte)           pte_free_slow(pte)

#define pgd_set(pgd,pmd) pgd_val(*pgd) = ( ((unsigned long)pmd) & PAGE_MASK)

#define pgd_populate(mm, pgd, pmd)      pgd_set(pgd,pmd)

static inline pmd_t*

pmd_alloc_one_fast (struct mm_struct *mm, unsigned long addr)

{

#if defined(CONFIG_SH64_PGTABLE_2_LEVEL)

        BUG();

#endif

        return 0;

}

static inline pmd_t*

pmd_alloc_one (struct mm_struct *mm, unsigned long addr)

{

        pmd_t *pmd = NULL;

#if defined(CONFIG_SH64_PGTABLE_2_LEVEL)

        BUG();

#elif defined(CONFIG_SH64_PGTABLE_3_LEVEL)

        pmd = (pmd_t *) __get_free_page(GFP_KERNEL);

        if (pmd != NULL )

                clear_page(pmd);

#endif

        return pmd;

}

#if defined(CONFIG_SH64_PGTABLE_2_LEVEL)

static inline void

pmd_free (pmd_t *pmd)

{

        return;

}

#elif defined(CONFIG_SH64_PGTABLE_3_LEVEL)

static inline void

pmd_free (pmd_t *pmd)

{

 free_page((unsigned long)pmd);

}

#endif

static inline void

pmd_populate (struct mm_struct *mm, pmd_t *pmd, pte_t *pte)

{

  pmd_set(pmd,pte);

    //     pmd_val(*pmd_entry) = __pa(pte);

}

/* Do nothing */

#define do_check_pgt_cache(low, high)   (0)

/*

 * TLB flushing:

 *

 *  - flush_tlb() flushes the current mm struct TLBs

 *  - flush_tlb_all() flushes all processes TLBs

 *  - flush_tlb_mm(mm) flushes the specified mm context TLB's

 *  - flush_tlb_page(vma, vmaddr) flushes one page

 *  - flush_tlb_range(mm, start, end) flushes a range of pages

 *  - flush_tlb_pgtables(mm, start, end) flushes a range of page tables

 */

extern void flush_tlb(void);

extern void flush_tlb_all(void);

extern void flush_tlb_mm(struct mm_struct *mm);

extern void flush_tlb_range(struct mm_struct *mm, unsigned long start,

                            unsigned long end);

extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long page);

static inline void flush_tlb_pgtables(struct mm_struct *mm,

                                      unsigned long start, unsigned long end)

{ /* Nothing to do */

}

/* These are generic functions. These will need to change once D cache

 * aliasing support has been added.

 */

static inline pte_t ptep_get_and_clear(pte_t *ptep)

{

        pte_t pte = *ptep;

        pte_clear(ptep);

        return pte;

}

/*

 * Following functions are same as generic ones.

 */

static inline int ptep_test_and_clear_young(pte_t *ptep)

{

        pte_t pte = *ptep;

        if (!pte_young(pte))

                return 0;

        set_pte(ptep, pte_mkold(pte));

        return 1;

}

static inline int ptep_test_and_clear_dirty(pte_t *ptep)

{

        pte_t pte = *ptep;

        if (!pte_dirty(pte))

                return 0;

        set_pte(ptep, pte_mkclean(pte));

        return 1;

}

static inline void ptep_set_wrprotect(pte_t *ptep)

{

        pte_t old_pte = *ptep;

        set_pte(ptep, pte_wrprotect(old_pte));

}

static inline void ptep_mkdirty(pte_t *ptep)

{

        pte_t old_pte = *ptep;

        set_pte(ptep, pte_mkdirty(old_pte));

}

#endif /* __ASM_SH64_PGALLOC_H */