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motorola_pgalloc.h

#ifndef _MOTOROLA_PGALLOC_H
#define _MOTOROLA_PGALLOC_H

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

extern pmd_t *get_pointer_table(void);
extern int free_pointer_table(pmd_t *);

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

      pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);
      if (pte) {
            __flush_page_to_ram(pte);
            flush_tlb_kernel_page(pte);
            nocache_page(pte);
      }

      return pte;
}

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

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

      if(!page)
            return NULL;

      pte = kmap(page);
      __flush_page_to_ram(pte);
      flush_tlb_kernel_page(pte);
      nocache_page(pte);
      kunmap(page);
      pgtable_page_ctor(page);
      return page;
}

static inline void pte_free(struct mm_struct *mm, pgtable_t page)
{
      pgtable_page_dtor(page);
      cache_page(kmap(page));
      kunmap(page);
      __free_page(page);
}

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


static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
{
      return get_pointer_table();
}

static inline int pmd_free(struct mm_struct *mm, pmd_t *pmd)
{
      return free_pointer_table(pmd);
}

static inline int __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd,
                         unsigned long address)
{
      return free_pointer_table(pmd);
}


static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
{
      pmd_free(mm, (pmd_t *)pgd);
}

static inline pgd_t *pgd_alloc(struct mm_struct *mm)
{
      return (pgd_t *)get_pointer_table();
}


static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
{
      pmd_set(pmd, pte);
}

static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page)
{
      pmd_set(pmd, page_address(page));
}
#define pmd_pgtable(pmd) pmd_page(pmd)

static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pmd_t *pmd)
{
      pgd_set(pgd, pmd);
}

#endif /* _MOTOROLA_PGALLOC_H */

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