Subversion Repositories openrisc

typedef struct {

    unsigned long pmd0;

    unsigned long pmd1;

} pmd_t;

typedef unsigned int pgd_t;

struct mm_struct {

    pgd_t * pgd;

};

extern inline int pmd_bad(pmd_t pmd)

{

}

extern inline void pmd_clear(pmd_t * pmdp)

{

  ((*pmdp).pmd0) = 0x20 | 0x00;

  ((*pmdp).pmd1) = 0x20 | 0x00;

}

static inline void free_one_pmd(pmd_t * dir)

{

  if (pmd_bad(*dir)) {

      pmd_clear(dir);

  }

}

static inline void free_one_pgd(pgd_t * dir)

{

  int j;

  pmd_t * pmd;

  pmd = ((pmd_t *) ((unsigned long) (void *)(__pgd_val(dir) & (~((1UL << 12)-1)))) + (((0) >> 21) & (512 - 1)));

  for (j = 0; j < 512 ; j++) {

      free_one_pmd(pmd+j);

  }

}

void clear_page_tables(struct mm_struct *mm, unsigned long first, int nr)

{

  pgd_t * page_dir = mm->pgd;

  do {

      free_one_pgd(page_dir);

  } while (--nr);

}