[mirror_ubuntu-zesty-kernel.git] / arch / m32r / include / asm / pgtable-2level.h

#ifndef _ASM_M32R_PGTABLE_2LEVEL_H
#define _ASM_M32R_PGTABLE_2LEVEL_H
#ifdef __KERNEL__

/*
 * traditional M32R two-level paging structure:
 */

#define PGDIR_SHIFT	22
#define PTRS_PER_PGD	1024

/*
 * the M32R is two-level, so we don't really have any
 * PMD directory physically.
 */
#define __PAGETABLE_PMD_FOLDED
#define PMD_SHIFT	22
#define PTRS_PER_PMD	1

#define PTRS_PER_PTE	1024

#define pte_ERROR(e) \
	printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
#define pmd_ERROR(e) \
	printk("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e))
#define pgd_ERROR(e) \
	printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))

/*
 * The "pgd_xxx()" functions here are trivial for a folded two-level
 * setup: the pgd is never bad, and a pmd always exists (as it's folded
 * into the pgd entry)
 */
static inline int pgd_none(pgd_t pgd)	{ return 0; }
static inline int pgd_bad(pgd_t pgd)	{ return 0; }
static inline int pgd_present(pgd_t pgd)	{ return 1; }
#define pgd_clear(xp)				do { } while (0)

/*
 * Certain architectures need to do special things when PTEs
 * within a page table are directly modified.  Thus, the following
 * hook is made available.
 */
#define set_pte(pteptr, pteval) (*(pteptr) = pteval)
#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)

/*
 * (pmds are folded into pgds so this doesn't get actually called,
 * but the define is needed for a generic inline function.)
 */
#define set_pmd(pmdptr, pmdval) (*(pmdptr) = pmdval)
#define set_pgd(pgdptr, pgdval) (*(pgdptr) = pgdval)

#define pgd_page_vaddr(pgd) \
((unsigned long) __va(pgd_val(pgd) & PAGE_MASK))

#ifndef CONFIG_DISCONTIGMEM
#define pgd_page(pgd)	(mem_map + ((pgd_val(pgd) >> PAGE_SHIFT) - PFN_BASE))
#endif /* !CONFIG_DISCONTIGMEM */

static inline pmd_t *pmd_offset(pgd_t * dir, unsigned long address)
{
	return (pmd_t *) dir;
}

#define ptep_get_and_clear(mm,addr,xp)	__pte(xchg(&(xp)->pte, 0))
#define pte_same(a, b)		(pte_val(a) == pte_val(b))
#define pte_page(x)		pfn_to_page(pte_pfn(x))
#define pte_none(x)		(!pte_val(x))
#define pte_pfn(x)		(pte_val(x) >> PAGE_SHIFT)
#define pfn_pte(pfn, prot)	__pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
#define pfn_pmd(pfn, prot)	__pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot))

#endif /* __KERNEL__ */
#endif /* _ASM_M32R_PGTABLE_2LEVEL_H */
Commit	Line	Data
1da177e4 LT	1	#ifndef _ASM_M32R_PGTABLE_2LEVEL_H
1da177e4 LT	2	#define _ASM_M32R_PGTABLE_2LEVEL_H
1da177e4 LT	3	#ifdef __KERNEL__
1da177e4 LT	4
1da177e4 LT	5	/*
	6	* traditional M32R two-level paging structure:
	7	*/
	8
	9	#define PGDIR_SHIFT 22
	10	#define PTRS_PER_PGD 1024
	11
	12	/*
	13	* the M32R is two-level, so we don't really have any
	14	* PMD directory physically.
	15	*/
c07af4f1	16	#define __PAGETABLE_PMD_FOLDED
1da177e4 LT	17	#define PMD_SHIFT 22
	18	#define PTRS_PER_PMD 1
	19
	20	#define PTRS_PER_PTE 1024
	21
	22	#define pte_ERROR(e) \
	23	printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
	24	#define pmd_ERROR(e) \
	25	printk("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e))
	26	#define pgd_ERROR(e) \
	27	printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
	28
	29	/*
	30	* The "pgd_xxx()" functions here are trivial for a folded two-level
	31	* setup: the pgd is never bad, and a pmd always exists (as it's folded
	32	* into the pgd entry)
	33	*/
	34	static inline int pgd_none(pgd_t pgd) { return 0; }
	35	static inline int pgd_bad(pgd_t pgd) { return 0; }
	36	static inline int pgd_present(pgd_t pgd) { return 1; }
	37	#define pgd_clear(xp) do { } while (0)
	38
	39	/*
	40	* Certain architectures need to do special things when PTEs
	41	* within a page table are directly modified. Thus, the following
	42	* hook is made available.
	43	*/
	44	#define set_pte(pteptr, pteval) (*(pteptr) = pteval)
	45	#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
a93cb055	46
1da177e4	47	/*
25985edc	48	* (pmds are folded into pgds so this doesn't get actually called,
1da177e4 LT	49	* but the define is needed for a generic inline function.)
	50	*/
	51	#define set_pmd(pmdptr, pmdval) (*(pmdptr) = pmdval)
	52	#define set_pgd(pgdptr, pgdval) (*(pgdptr) = pgdval)
	53
46a82b2d	54	#define pgd_page_vaddr(pgd) \
1da177e4 LT	55	((unsigned long) __va(pgd_val(pgd) & PAGE_MASK))
1da177e4 LT	56
46a82b2d DM	57	#ifndef CONFIG_DISCONTIGMEM
	58	#define pgd_page(pgd) (mem_map + ((pgd_val(pgd) >> PAGE_SHIFT) - PFN_BASE))
	59	#endif /* !CONFIG_DISCONTIGMEM */
	60
1da177e4 LT	61	static inline pmd_t pmd_offset(pgd_t dir, unsigned long address)
	62	{
	63	return (pmd_t *) dir;
	64	}
	65
	66	#define ptep_get_and_clear(mm,addr,xp) __pte(xchg(&(xp)->pte, 0))
	67	#define pte_same(a, b) (pte_val(a) == pte_val(b))
	68	#define pte_page(x) pfn_to_page(pte_pfn(x))
	69	#define pte_none(x) (!pte_val(x))
	70	#define pte_pfn(x) (pte_val(x) >> PAGE_SHIFT)
	71	#define pfn_pte(pfn, prot) __pte(((pfn) << PAGE_SHIFT) \| pgprot_val(prot))
	72	#define pfn_pmd(pfn, prot) __pmd(((pfn) << PAGE_SHIFT) \| pgprot_val(prot))
	73
1da177e4	74	#endif /* __KERNEL__ */
1da177e4	75	#endif /* _ASM_M32R_PGTABLE_2LEVEL_H */