[mirror_ubuntu-zesty-kernel.git] / arch / powerpc / include / asm / pgalloc-32.h

#ifndef _ASM_POWERPC_PGALLOC_32_H
#define _ASM_POWERPC_PGALLOC_32_H

#include <linux/threads.h>

#define PTE_NONCACHE_NUM	0  /* dummy for now to share code w/ppc64 */

extern void __bad_pte(pmd_t *pmd);

extern pgd_t *pgd_alloc(struct mm_struct *mm);
extern void pgd_free(struct mm_struct *mm, pgd_t *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(mm, x) 		do { } while (0)
#define __pmd_free_tlb(tlb,x,a)		do { } while (0)
/* #define pgd_populate(mm, pmd, pte)      BUG() */

#ifndef CONFIG_BOOKE
#define pmd_populate_kernel(mm, pmd, pte)	\
		(pmd_val(*(pmd)) = __pa(pte) | _PMD_PRESENT)
#define pmd_populate(mm, pmd, pte)	\
		(pmd_val(*(pmd)) = (page_to_pfn(pte) << PAGE_SHIFT) | _PMD_PRESENT)
#define pmd_pgtable(pmd) pmd_page(pmd)
#else
#define pmd_populate_kernel(mm, pmd, pte)	\
		(pmd_val(*(pmd)) = (unsigned long)pte | _PMD_PRESENT)
#define pmd_populate(mm, pmd, pte)	\
		(pmd_val(*(pmd)) = (unsigned long)lowmem_page_address(pte) | _PMD_PRESENT)
#define pmd_pgtable(pmd) pmd_page(pmd)
#endif

extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr);
extern pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addr);

static inline void pgtable_free(pgtable_free_t pgf)
{
	void *p = (void *)(pgf.val & ~PGF_CACHENUM_MASK);

	free_page((unsigned long)p);
}

#define check_pgt_cache()	do { } while (0)

#endif /* _ASM_POWERPC_PGALLOC_32_H */
Commit	Line	Data
f88df14b DG	1	#ifndef _ASM_POWERPC_PGALLOC_32_H
	2	#define _ASM_POWERPC_PGALLOC_32_H
	3
	4	#include <linux/threads.h>
	5
0186f47e KG	6	#define PTE_NONCACHE_NUM 0 /* dummy for now to share code w/ppc64 */
0186f47e KG	7
f88df14b DG	8	extern void __bad_pte(pmd_t *pmd);
	9
	10	extern pgd_t pgd_alloc(struct mm_struct mm);
5e541973	11	extern void pgd_free(struct mm_struct mm, pgd_t pgd);
f88df14b DG	12
	13	/*
	14	* We don't have any real pmd's, and this code never triggers because
	15	* the pgd will always be present..
	16	*/
d1953c88	17	/* #define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t )2); }) /
5e541973	18	#define pmd_free(mm, x) do { } while (0)
9e1b32ca	19	#define __pmd_free_tlb(tlb,x,a) do { } while (0)
d1953c88	20	/* #define pgd_populate(mm, pmd, pte) BUG() */
f88df14b DG	21
	22	#ifndef CONFIG_BOOKE
	23	#define pmd_populate_kernel(mm, pmd, pte) \
	24	(pmd_val(*(pmd)) = __pa(pte) \| _PMD_PRESENT)
	25	#define pmd_populate(mm, pmd, pte) \
	26	(pmd_val(*(pmd)) = (page_to_pfn(pte) << PAGE_SHIFT) \| _PMD_PRESENT)
2f569afd	27	#define pmd_pgtable(pmd) pmd_page(pmd)
f88df14b DG	28	#else
	29	#define pmd_populate_kernel(mm, pmd, pte) \
	30	(pmd_val(*(pmd)) = (unsigned long)pte \| _PMD_PRESENT)
	31	#define pmd_populate(mm, pmd, pte) \
	32	(pmd_val(*(pmd)) = (unsigned long)lowmem_page_address(pte) \| _PMD_PRESENT)
2f569afd	33	#define pmd_pgtable(pmd) pmd_page(pmd)
f88df14b DG	34	#endif
	35
	36	extern pte_t pte_alloc_one_kernel(struct mm_struct mm, unsigned long addr);
2f569afd	37	extern pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addr);
f88df14b	38
0186f47e KG	39	static inline void pgtable_free(pgtable_free_t pgf)
	40	{
	41	void p = (void )(pgf.val & ~PGF_CACHENUM_MASK);
	42
	43	free_page((unsigned long)p);
	44	}
f88df14b DG	45
	46	#define check_pgt_cache() do { } while (0)
	47
	48	#endif /* _ASM_POWERPC_PGALLOC_32_H */