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/*
* BK Id: %F% %I% %G% %U% %#%
*/
#ifdef __KERNEL__
#ifndef _PPC_PGALLOC_H
#define _PPC_PGALLOC_H
#include <linux/config.h>
#include <linux/threads.h>
#include <linux/highmem.h>
#include <asm/processor.h>
extern void __bad_pte(pmd_t *pmd);
static inline pgd_t *pgd_alloc(struct mm_struct *mm)
{
pgd_t *ret;
if ((ret = (pgd_t *)__get_free_page(GFP_KERNEL)) != NULL)
clear_page(ret);
return ret;
}
extern __inline__ void pgd_free(pgd_t *pgd)
{
free_page((unsigned long)pgd);
}
/*
* We don't have any real pmd's, and this code never triggers because
* the pgd will always be present..
*/
#define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t *)2); })
#define pmd_free(x) do { } while (0)
#define pgd_populate(mm, pmd, pte) BUG()
static inline pte_t *
pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
{
pte_t *pte;
extern int mem_init_done;
extern void *early_get_page(void);
int timeout = 0;
if (mem_init_done) {
while ((pte = (pte_t *) __get_free_page(GFP_KERNEL)) == NULL
&& ++timeout < 10) {
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout(HZ);
}
} else
pte = (pte_t *) early_get_page();
if (pte != NULL)
clear_page(pte);
return pte;
}
static inline struct page *
pte_alloc_one(struct mm_struct *mm, unsigned long address)
{
struct page *pte;
int timeout = 0;
#ifdef CONFIG_HIGHPTE
int flags = GFP_KERNEL | __GFP_HIGHMEM;
#else
int flags = GFP_KERNEL;
#endif
while ((pte = alloc_pages(flags, 0)) == NULL) {
if (++timeout >= 10)
return NULL;
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout(HZ);
}
clear_highpage(pte);
return pte;
}
static inline void pte_free_kernel(pte_t *pte)
{
free_page((unsigned long)pte);
}
static inline void pte_free(struct page *pte)
{
__free_page(pte);
}
#define pmd_populate_kernel(mm, pmd, pte) \
(pmd_val(*(pmd)) = __pa(pte))
#define pmd_populate(mm, pmd, pte) \
(pmd_val(*(pmd)) = ((pte) - mem_map) << PAGE_SHIFT)
extern int do_check_pgt_cache(int, int);
#endif /* _PPC_PGALLOC_H */
#endif /* __KERNEL__ */
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