[linux-2.6-block.git] / include / asm-mips / pgtable.h

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2003 Ralf Baechle
 */
#ifndef _ASM_PGTABLE_H
#define _ASM_PGTABLE_H

#ifdef CONFIG_32BIT
#include <asm/pgtable-32.h>
#endif
#ifdef CONFIG_64BIT
#include <asm/pgtable-64.h>
#endif

#include <asm/io.h>
#include <asm/pgtable-bits.h>

struct mm_struct;
struct vm_area_struct;

#define PAGE_NONE	__pgprot(_PAGE_PRESENT | _CACHE_CACHABLE_NONCOHERENT)
#define PAGE_SHARED	__pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \
			PAGE_CACHABLE_DEFAULT)
#define PAGE_COPY	__pgprot(_PAGE_PRESENT | _PAGE_READ | \
			PAGE_CACHABLE_DEFAULT)
#define PAGE_READONLY	__pgprot(_PAGE_PRESENT | _PAGE_READ | \
			PAGE_CACHABLE_DEFAULT)
#define PAGE_KERNEL	__pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \
			_PAGE_GLOBAL | PAGE_CACHABLE_DEFAULT)
#define PAGE_USERIO	__pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \
			PAGE_CACHABLE_DEFAULT)
#define PAGE_KERNEL_UNCACHED __pgprot(_PAGE_PRESENT | __READABLE | \
			__WRITEABLE | _PAGE_GLOBAL | _CACHE_UNCACHED)

/*
 * MIPS can't do page protection for execute, and considers that the same like
 * read. Also, write permissions imply read permissions. This is the closest
 * we can get by reasonable means..
 */
#define __P000	PAGE_NONE
#define __P001	PAGE_READONLY
#define __P010	PAGE_COPY
#define __P011	PAGE_COPY
#define __P100	PAGE_READONLY
#define __P101	PAGE_READONLY
#define __P110	PAGE_COPY
#define __P111	PAGE_COPY

#define __S000	PAGE_NONE
#define __S001	PAGE_READONLY
#define __S010	PAGE_SHARED
#define __S011	PAGE_SHARED
#define __S100	PAGE_READONLY
#define __S101	PAGE_READONLY
#define __S110	PAGE_SHARED
#define __S111	PAGE_SHARED

/*
 * ZERO_PAGE is a global shared page that is always zero; used
 * for zero-mapped memory areas etc..
 */

extern unsigned long empty_zero_page;
extern unsigned long zero_page_mask;

#define ZERO_PAGE(vaddr) \
	(virt_to_page((void *)(empty_zero_page + (((unsigned long)(vaddr)) & zero_page_mask))))

extern void paging_init(void);

/*
 * Conversion functions: convert a page and protection to a page entry,
 * and a page entry and page directory to the page they refer to.
 */
#define pmd_phys(pmd)		virt_to_phys((void *)pmd_val(pmd))
#define pmd_page(pmd)		(pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT))
#define pmd_page_vaddr(pmd)	pmd_val(pmd)

#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32_R1)

#define pte_none(pte)		(!(((pte).pte_low | (pte).pte_high) & ~_PAGE_GLOBAL))
#define pte_present(pte)	((pte).pte_low & _PAGE_PRESENT)

static inline void set_pte(pte_t *ptep, pte_t pte)
{
	ptep->pte_high = pte.pte_high;
	smp_wmb();
	ptep->pte_low = pte.pte_low;
	//printk("pte_high %x pte_low %x\n", ptep->pte_high, ptep->pte_low);

	if (pte.pte_low & _PAGE_GLOBAL) {
		pte_t *buddy = ptep_buddy(ptep);
		/*
		 * Make sure the buddy is global too (if it's !none,
		 * it better already be global)
		 */
		if (pte_none(*buddy)) {
			buddy->pte_low  |= _PAGE_GLOBAL;
			buddy->pte_high |= _PAGE_GLOBAL;
		}
	}
}
#define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval)

static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
{
	pte_t null = __pte(0);

	/* Preserve global status for the pair */
	if (ptep_buddy(ptep)->pte_low & _PAGE_GLOBAL)
		null.pte_low = null.pte_high = _PAGE_GLOBAL;

	set_pte_at(mm, addr, ptep, null);
}
#else

#define pte_none(pte)		(!(pte_val(pte) & ~_PAGE_GLOBAL))
#define pte_present(pte)	(pte_val(pte) & _PAGE_PRESENT)

/*
 * Certain architectures need to do special things when pte's
 * within a page table are directly modified.  Thus, the following
 * hook is made available.
 */
static inline void set_pte(pte_t *ptep, pte_t pteval)
{
	*ptep = pteval;
#if !defined(CONFIG_CPU_R3000) && !defined(CONFIG_CPU_TX39XX)
	if (pte_val(pteval) & _PAGE_GLOBAL) {
		pte_t *buddy = ptep_buddy(ptep);
		/*
		 * Make sure the buddy is global too (if it's !none,
		 * it better already be global)
		 */
		if (pte_none(*buddy))
			pte_val(*buddy) = pte_val(*buddy) | _PAGE_GLOBAL;
	}
#endif
}
#define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval)

static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
{
#if !defined(CONFIG_CPU_R3000) && !defined(CONFIG_CPU_TX39XX)
	/* Preserve global status for the pair */
	if (pte_val(*ptep_buddy(ptep)) & _PAGE_GLOBAL)
		set_pte_at(mm, addr, ptep, __pte(_PAGE_GLOBAL));
	else
#endif
		set_pte_at(mm, addr, ptep, __pte(0));
}
#endif

/*
 * (pmds are folded into puds so this doesn't get actually called,
 * but the define is needed for a generic inline function.)
 */
#define set_pmd(pmdptr, pmdval) do { *(pmdptr) = (pmdval); } while(0)

#ifdef CONFIG_64BIT
/*
 * (puds are folded into pgds so this doesn't get actually called,
 * but the define is needed for a generic inline function.)
 */
#define set_pud(pudptr, pudval) do { *(pudptr) = (pudval); } while(0)
#endif

#define PGD_T_LOG2	(__builtin_ffs(sizeof(pgd_t)) - 1)
#define PMD_T_LOG2	(__builtin_ffs(sizeof(pmd_t)) - 1)
#define PTE_T_LOG2	(__builtin_ffs(sizeof(pte_t)) - 1)

/*
 * We used to declare this array with size but gcc 3.3 and older are not able
 * to find that this expression is a constant, so the size is dropped.
 */
extern pgd_t swapper_pg_dir[];

/*
 * The following only work if pte_present() is true.
 * Undefined behaviour if not..
 */
#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32_R1)
static inline int pte_write(pte_t pte)	{ return pte.pte_low & _PAGE_WRITE; }
static inline int pte_dirty(pte_t pte)	{ return pte.pte_low & _PAGE_MODIFIED; }
static inline int pte_young(pte_t pte)	{ return pte.pte_low & _PAGE_ACCESSED; }
static inline int pte_file(pte_t pte)	{ return pte.pte_low & _PAGE_FILE; }

static inline pte_t pte_wrprotect(pte_t pte)
{
	pte.pte_low  &= ~(_PAGE_WRITE | _PAGE_SILENT_WRITE);
	pte.pte_high &= ~_PAGE_SILENT_WRITE;
	return pte;
}

static inline pte_t pte_mkclean(pte_t pte)
{
	pte.pte_low  &= ~(_PAGE_MODIFIED | _PAGE_SILENT_WRITE);
	pte.pte_high &= ~_PAGE_SILENT_WRITE;
	return pte;
}

static inline pte_t pte_mkold(pte_t pte)
{
	pte.pte_low  &= ~(_PAGE_ACCESSED | _PAGE_SILENT_READ);
	pte.pte_high &= ~_PAGE_SILENT_READ;
	return pte;
}

static inline pte_t pte_mkwrite(pte_t pte)
{
	pte.pte_low |= _PAGE_WRITE;
	if (pte.pte_low & _PAGE_MODIFIED) {
		pte.pte_low  |= _PAGE_SILENT_WRITE;
		pte.pte_high |= _PAGE_SILENT_WRITE;
	}
	return pte;
}

static inline pte_t pte_mkdirty(pte_t pte)
{
	pte.pte_low |= _PAGE_MODIFIED;
	if (pte.pte_low & _PAGE_WRITE) {
		pte.pte_low  |= _PAGE_SILENT_WRITE;
		pte.pte_high |= _PAGE_SILENT_WRITE;
	}
	return pte;
}

static inline pte_t pte_mkyoung(pte_t pte)
{
	pte.pte_low |= _PAGE_ACCESSED;
	if (pte.pte_low & _PAGE_READ)
		pte.pte_low  |= _PAGE_SILENT_READ;
		pte.pte_high |= _PAGE_SILENT_READ;
	return pte;
}
#else
static inline int pte_write(pte_t pte)	{ return pte_val(pte) & _PAGE_WRITE; }
static inline int pte_dirty(pte_t pte)	{ return pte_val(pte) & _PAGE_MODIFIED; }
static inline int pte_young(pte_t pte)	{ return pte_val(pte) & _PAGE_ACCESSED; }
static inline int pte_file(pte_t pte)	{ return pte_val(pte) & _PAGE_FILE; }

static inline pte_t pte_wrprotect(pte_t pte)
{
	pte_val(pte) &= ~(_PAGE_WRITE | _PAGE_SILENT_WRITE);
	return pte;
}

static inline pte_t pte_mkclean(pte_t pte)
{
	pte_val(pte) &= ~(_PAGE_MODIFIED|_PAGE_SILENT_WRITE);
	return pte;
}

static inline pte_t pte_mkold(pte_t pte)
{
	pte_val(pte) &= ~(_PAGE_ACCESSED|_PAGE_SILENT_READ);
	return pte;
}

static inline pte_t pte_mkwrite(pte_t pte)
{
	pte_val(pte) |= _PAGE_WRITE;
	if (pte_val(pte) & _PAGE_MODIFIED)
		pte_val(pte) |= _PAGE_SILENT_WRITE;
	return pte;
}

static inline pte_t pte_mkdirty(pte_t pte)
{
	pte_val(pte) |= _PAGE_MODIFIED;
	if (pte_val(pte) & _PAGE_WRITE)
		pte_val(pte) |= _PAGE_SILENT_WRITE;
	return pte;
}

static inline pte_t pte_mkyoung(pte_t pte)
{
	pte_val(pte) |= _PAGE_ACCESSED;
	if (pte_val(pte) & _PAGE_READ)
		pte_val(pte) |= _PAGE_SILENT_READ;
	return pte;
}
#endif

/*
 * Macro to make mark a page protection value as "uncacheable".  Note
 * that "protection" is really a misnomer here as the protection value
 * contains the memory attribute bits, dirty bits, and various other
 * bits as well.
 */
#define pgprot_noncached pgprot_noncached

static inline pgprot_t pgprot_noncached(pgprot_t _prot)
{
	unsigned long prot = pgprot_val(_prot);

	prot = (prot & ~_CACHE_MASK) | _CACHE_UNCACHED;

	return __pgprot(prot);
}

/*
 * Conversion functions: convert a page and protection to a page entry,
 * and a page entry and page directory to the page they refer to.
 */
#define mk_pte(page, pgprot)	pfn_pte(page_to_pfn(page), (pgprot))

#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32_R1)
static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
{
	pte.pte_low  &= _PAGE_CHG_MASK;
	pte.pte_high &= ~0x3f;
	pte.pte_low  |= pgprot_val(newprot);
	pte.pte_high |= pgprot_val(newprot) & 0x3f;
	return pte;
}
#else
static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
{
	return __pte((pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot));
}
#endif


extern void __update_tlb(struct vm_area_struct *vma, unsigned long address,
	pte_t pte);
extern void __update_cache(struct vm_area_struct *vma, unsigned long address,
	pte_t pte);

static inline void update_mmu_cache(struct vm_area_struct *vma,
	unsigned long address, pte_t pte)
{
	__update_tlb(vma, address, pte);
	__update_cache(vma, address, pte);
}

#define kern_addr_valid(addr)	(1)

#ifdef CONFIG_64BIT_PHYS_ADDR
extern int remap_pfn_range(struct vm_area_struct *vma, unsigned long from, unsigned long pfn, unsigned long size, pgprot_t prot);

static inline int io_remap_pfn_range(struct vm_area_struct *vma,
		unsigned long vaddr,
		unsigned long pfn,
		unsigned long size,
		pgprot_t prot)
{
	phys_t phys_addr_high = fixup_bigphys_addr(pfn << PAGE_SHIFT, size);
	return remap_pfn_range(vma, vaddr, phys_addr_high >> PAGE_SHIFT, size, prot);
}
#else
#define io_remap_pfn_range(vma, vaddr, pfn, size, prot)		\
		remap_pfn_range(vma, vaddr, pfn, size, prot)
#endif

#include <asm-generic/pgtable.h>

/*
 * We provide our own get_unmapped area to cope with the virtual aliasing
 * constraints placed on us by the cache architecture.
 */
#define HAVE_ARCH_UNMAPPED_AREA

/*
 * No page table caches to initialise
 */
#define pgtable_cache_init()	do { } while (0)

#endif /* _ASM_PGTABLE_H */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* This file is subject to the terms and conditions of the GNU General Public
	3	* License. See the file "COPYING" in the main directory of this archive
	4	* for more details.
	5	*
	6	* Copyright (C) 2003 Ralf Baechle
	7	*/
	8	#ifndef _ASM_PGTABLE_H
	9	#define _ASM_PGTABLE_H
	10
875d43e7	11	#ifdef CONFIG_32BIT
1da177e4 LT	12	#include <asm/pgtable-32.h>
1da177e4 LT	13	#endif
875d43e7	14	#ifdef CONFIG_64BIT
1da177e4 LT	15	#include <asm/pgtable-64.h>
	16	#endif
	17
f10fae02	18	#include <asm/io.h>
1da177e4 LT	19	#include <asm/pgtable-bits.h>
1da177e4 LT	20
8c65b4a6 TS	21	struct mm_struct;
	22	struct vm_area_struct;
	23
1da177e4 LT	24	#define PAGE_NONE __pgprot(_PAGE_PRESENT \| _CACHE_CACHABLE_NONCOHERENT)
	25	#define PAGE_SHARED __pgprot(_PAGE_PRESENT \| _PAGE_READ \| _PAGE_WRITE \| \
	26	PAGE_CACHABLE_DEFAULT)
	27	#define PAGE_COPY __pgprot(_PAGE_PRESENT \| _PAGE_READ \| \
	28	PAGE_CACHABLE_DEFAULT)
	29	#define PAGE_READONLY __pgprot(_PAGE_PRESENT \| _PAGE_READ \| \
	30	PAGE_CACHABLE_DEFAULT)
	31	#define PAGE_KERNEL __pgprot(_PAGE_PRESENT \| __READABLE \| __WRITEABLE \| \
	32	_PAGE_GLOBAL \| PAGE_CACHABLE_DEFAULT)
	33	#define PAGE_USERIO __pgprot(_PAGE_PRESENT \| _PAGE_READ \| _PAGE_WRITE \| \
	34	PAGE_CACHABLE_DEFAULT)
	35	#define PAGE_KERNEL_UNCACHED __pgprot(_PAGE_PRESENT \| __READABLE \| \
	36	__WRITEABLE \| _PAGE_GLOBAL \| _CACHE_UNCACHED)
	37
	38	/*
	39	* MIPS can't do page protection for execute, and considers that the same like
	40	* read. Also, write permissions imply read permissions. This is the closest
	41	* we can get by reasonable means..
	42	*/
	43	#define __P000 PAGE_NONE
	44	#define __P001 PAGE_READONLY
	45	#define __P010 PAGE_COPY
	46	#define __P011 PAGE_COPY
	47	#define __P100 PAGE_READONLY
	48	#define __P101 PAGE_READONLY
	49	#define __P110 PAGE_COPY
	50	#define __P111 PAGE_COPY
	51
	52	#define __S000 PAGE_NONE
	53	#define __S001 PAGE_READONLY
	54	#define __S010 PAGE_SHARED
	55	#define __S011 PAGE_SHARED
	56	#define __S100 PAGE_READONLY
	57	#define __S101 PAGE_READONLY
	58	#define __S110 PAGE_SHARED
	59	#define __S111 PAGE_SHARED
	60
	61	/*
	62	* ZERO_PAGE is a global shared page that is always zero; used
	63	* for zero-mapped memory areas etc..
	64	*/
	65
	66	extern unsigned long empty_zero_page;
	67	extern unsigned long zero_page_mask;
	68
	69	#define ZERO_PAGE(vaddr) \
99e3b942	70	(virt_to_page((void *)(empty_zero_page + (((unsigned long)(vaddr)) & zero_page_mask))))
1da177e4 LT	71
	72	extern void paging_init(void);
	73
	74	/*
	75	* Conversion functions: convert a page and protection to a page entry,
	76	* and a page entry and page directory to the page they refer to.
	77	*/
c9d06962	78	#define pmd_phys(pmd) virt_to_phys((void *)pmd_val(pmd))
1da177e4	79	#define pmd_page(pmd) (pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT))
46a82b2d	80	#define pmd_page_vaddr(pmd) pmd_val(pmd)
1da177e4	81
6e760c8d	82	#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32_R1)
6e953891 SS	83
	84	#define pte_none(pte) (!(((pte).pte_low \| (pte).pte_high) & ~_PAGE_GLOBAL))
	85	#define pte_present(pte) ((pte).pte_low & _PAGE_PRESENT)
	86
1da177e4 LT	87	static inline void set_pte(pte_t *ptep, pte_t pte)
	88	{
	89	ptep->pte_high = pte.pte_high;
	90	smp_wmb();
	91	ptep->pte_low = pte.pte_low;
	92	//printk("pte_high %x pte_low %x\n", ptep->pte_high, ptep->pte_low);
	93
6e953891	94	if (pte.pte_low & _PAGE_GLOBAL) {
1da177e4 LT	95	pte_t *buddy = ptep_buddy(ptep);
	96	/*
	97	* Make sure the buddy is global too (if it's !none,
	98	* it better already be global)
	99	*/
6e953891 SS	100	if (pte_none(*buddy)) {
	101	buddy->pte_low \|= _PAGE_GLOBAL;
	102	buddy->pte_high \|= _PAGE_GLOBAL;
	103	}
1da177e4 LT	104	}
1da177e4 LT	105	}
21a151d8	106	#define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval)
1da177e4 LT	107
	108	static inline void pte_clear(struct mm_struct mm, unsigned long addr, pte_t ptep)
	109	{
6e953891 SS	110	pte_t null = __pte(0);
6e953891 SS	111
1da177e4	112	/* Preserve global status for the pair */
6e953891 SS	113	if (ptep_buddy(ptep)->pte_low & _PAGE_GLOBAL)
	114	null.pte_low = null.pte_high = _PAGE_GLOBAL;
	115
	116	set_pte_at(mm, addr, ptep, null);
1da177e4 LT	117	}
1da177e4 LT	118	#else
6e953891 SS	119
	120	#define pte_none(pte) (!(pte_val(pte) & ~_PAGE_GLOBAL))
	121	#define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT)
	122
1da177e4 LT	123	/*
	124	* Certain architectures need to do special things when pte's
	125	* within a page table are directly modified. Thus, the following
	126	* hook is made available.
	127	*/
	128	static inline void set_pte(pte_t *ptep, pte_t pteval)
	129	{
	130	*ptep = pteval;
	131	#if !defined(CONFIG_CPU_R3000) && !defined(CONFIG_CPU_TX39XX)
	132	if (pte_val(pteval) & _PAGE_GLOBAL) {
	133	pte_t *buddy = ptep_buddy(ptep);
	134	/*
	135	* Make sure the buddy is global too (if it's !none,
	136	* it better already be global)
	137	*/
	138	if (pte_none(*buddy))
	139	pte_val(buddy) = pte_val(buddy) \| _PAGE_GLOBAL;
	140	}
	141	#endif
	142	}
21a151d8	143	#define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval)
1da177e4 LT	144
	145	static inline void pte_clear(struct mm_struct mm, unsigned long addr, pte_t ptep)
	146	{
	147	#if !defined(CONFIG_CPU_R3000) && !defined(CONFIG_CPU_TX39XX)
	148	/* Preserve global status for the pair */
	149	if (pte_val(*ptep_buddy(ptep)) & _PAGE_GLOBAL)
	150	set_pte_at(mm, addr, ptep, __pte(_PAGE_GLOBAL));
	151	else
	152	#endif
	153	set_pte_at(mm, addr, ptep, __pte(0));
	154	}
	155	#endif
	156
	157	/*
c6e8b587	158	* (pmds are folded into puds so this doesn't get actually called,
1da177e4 LT	159	* but the define is needed for a generic inline function.)
	160	*/
	161	#define set_pmd(pmdptr, pmdval) do { *(pmdptr) = (pmdval); } while(0)
c6e8b587 RB	162
	163	#ifdef CONFIG_64BIT
	164	/*
	165	* (puds are folded into pgds so this doesn't get actually called,
	166	* but the define is needed for a generic inline function.)
	167	*/
	168	#define set_pud(pudptr, pudval) do { *(pudptr) = (pudval); } while(0)
	169	#endif
1da177e4	170
5ff97472 RB	171	#define PGD_T_LOG2 (__builtin_ffs(sizeof(pgd_t)) - 1)
	172	#define PMD_T_LOG2 (__builtin_ffs(sizeof(pmd_t)) - 1)
	173	#define PTE_T_LOG2 (__builtin_ffs(sizeof(pte_t)) - 1)
1da177e4	174
9975e77d RB	175	/*
	176	* We used to declare this array with size but gcc 3.3 and older are not able
	177	* to find that this expression is a constant, so the size is dropped.
	178	*/
	179	extern pgd_t swapper_pg_dir[];
1da177e4 LT	180
	181	/*
	182	* The following only work if pte_present() is true.
	183	* Undefined behaviour if not..
	184	*/
6e760c8d	185	#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32_R1)
6e953891 SS	186	static inline int pte_write(pte_t pte) { return pte.pte_low & _PAGE_WRITE; }
	187	static inline int pte_dirty(pte_t pte) { return pte.pte_low & _PAGE_MODIFIED; }
	188	static inline int pte_young(pte_t pte) { return pte.pte_low & _PAGE_ACCESSED; }
	189	static inline int pte_file(pte_t pte) { return pte.pte_low & _PAGE_FILE; }
	190
1da177e4 LT	191	static inline pte_t pte_wrprotect(pte_t pte)
1da177e4 LT	192	{
6e953891 SS	193	pte.pte_low &= ~(_PAGE_WRITE \| _PAGE_SILENT_WRITE);
6e953891 SS	194	pte.pte_high &= ~_PAGE_SILENT_WRITE;
1da177e4 LT	195	return pte;
	196	}
	197
1da177e4 LT	198	static inline pte_t pte_mkclean(pte_t pte)
1da177e4 LT	199	{
6e953891 SS	200	pte.pte_low &= ~(_PAGE_MODIFIED \| _PAGE_SILENT_WRITE);
6e953891 SS	201	pte.pte_high &= ~_PAGE_SILENT_WRITE;
1da177e4 LT	202	return pte;
	203	}
	204
	205	static inline pte_t pte_mkold(pte_t pte)
	206	{
6e953891 SS	207	pte.pte_low &= ~(_PAGE_ACCESSED \| _PAGE_SILENT_READ);
6e953891 SS	208	pte.pte_high &= ~_PAGE_SILENT_READ;
1da177e4 LT	209	return pte;
	210	}
	211
	212	static inline pte_t pte_mkwrite(pte_t pte)
	213	{
6e953891 SS	214	pte.pte_low \|= _PAGE_WRITE;
	215	if (pte.pte_low & _PAGE_MODIFIED) {
	216	pte.pte_low \|= _PAGE_SILENT_WRITE;
	217	pte.pte_high \|= _PAGE_SILENT_WRITE;
1da177e4 LT	218	}
	219	return pte;
	220	}
	221
1da177e4 LT	222	static inline pte_t pte_mkdirty(pte_t pte)
1da177e4 LT	223	{
6e953891 SS	224	pte.pte_low \|= _PAGE_MODIFIED;
	225	if (pte.pte_low & _PAGE_WRITE) {
	226	pte.pte_low \|= _PAGE_SILENT_WRITE;
	227	pte.pte_high \|= _PAGE_SILENT_WRITE;
1da177e4 LT	228	}
	229	return pte;
	230	}
	231
	232	static inline pte_t pte_mkyoung(pte_t pte)
	233	{
6e953891 SS	234	pte.pte_low \|= _PAGE_ACCESSED;
	235	if (pte.pte_low & _PAGE_READ)
	236	pte.pte_low \|= _PAGE_SILENT_READ;
	237	pte.pte_high \|= _PAGE_SILENT_READ;
1da177e4 LT	238	return pte;
	239	}
	240	#else
1da177e4 LT	241	static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_WRITE; }
	242	static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_MODIFIED; }
	243	static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; }
	244	static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE; }
	245
	246	static inline pte_t pte_wrprotect(pte_t pte)
	247	{
	248	pte_val(pte) &= ~(_PAGE_WRITE \| _PAGE_SILENT_WRITE);
	249	return pte;
	250	}
	251
1da177e4 LT	252	static inline pte_t pte_mkclean(pte_t pte)
	253	{
	254	pte_val(pte) &= ~(_PAGE_MODIFIED\|_PAGE_SILENT_WRITE);
	255	return pte;
	256	}
	257
	258	static inline pte_t pte_mkold(pte_t pte)
	259	{
	260	pte_val(pte) &= ~(_PAGE_ACCESSED\|_PAGE_SILENT_READ);
	261	return pte;
	262	}
	263
	264	static inline pte_t pte_mkwrite(pte_t pte)
	265	{
	266	pte_val(pte) \|= _PAGE_WRITE;
	267	if (pte_val(pte) & _PAGE_MODIFIED)
	268	pte_val(pte) \|= _PAGE_SILENT_WRITE;
	269	return pte;
	270	}
	271
1da177e4 LT	272	static inline pte_t pte_mkdirty(pte_t pte)
	273	{
	274	pte_val(pte) \|= _PAGE_MODIFIED;
	275	if (pte_val(pte) & _PAGE_WRITE)
	276	pte_val(pte) \|= _PAGE_SILENT_WRITE;
	277	return pte;
	278	}
	279
	280	static inline pte_t pte_mkyoung(pte_t pte)
	281	{
	282	pte_val(pte) \|= _PAGE_ACCESSED;
	283	if (pte_val(pte) & _PAGE_READ)
	284	pte_val(pte) \|= _PAGE_SILENT_READ;
	285	return pte;
	286	}
	287	#endif
	288
	289	/*
	290	* Macro to make mark a page protection value as "uncacheable". Note
	291	* that "protection" is really a misnomer here as the protection value
	292	* contains the memory attribute bits, dirty bits, and various other
	293	* bits as well.
	294	*/
	295	#define pgprot_noncached pgprot_noncached
	296
	297	static inline pgprot_t pgprot_noncached(pgprot_t _prot)
	298	{
	299	unsigned long prot = pgprot_val(_prot);
	300
	301	prot = (prot & ~_CACHE_MASK) \| _CACHE_UNCACHED;
	302
	303	return __pgprot(prot);
	304	}
	305
	306	/*
	307	* Conversion functions: convert a page and protection to a page entry,
	308	* and a page entry and page directory to the page they refer to.
	309	*/
	310	#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
	311
6e760c8d	312	#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32_R1)
1da177e4 LT	313	static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
1da177e4 LT	314	{
79e0bc37 SS	315	pte.pte_low &= _PAGE_CHG_MASK;
	316	pte.pte_high &= ~0x3f;
	317	pte.pte_low \|= pgprot_val(newprot);
1da177e4 LT	318	pte.pte_high \|= pgprot_val(newprot) & 0x3f;
	319	return pte;
	320	}
	321	#else
	322	static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
	323	{
	324	return __pte((pte_val(pte) & _PAGE_CHG_MASK) \| pgprot_val(newprot));
	325	}
	326	#endif
	327
	328
	329	extern void __update_tlb(struct vm_area_struct *vma, unsigned long address,
	330	pte_t pte);
	331	extern void __update_cache(struct vm_area_struct *vma, unsigned long address,
	332	pte_t pte);
	333
	334	static inline void update_mmu_cache(struct vm_area_struct *vma,
	335	unsigned long address, pte_t pte)
	336	{
	337	__update_tlb(vma, address, pte);
	338	__update_cache(vma, address, pte);
	339	}
	340
1da177e4	341	#define kern_addr_valid(addr) (1)
1da177e4 LT	342
1da177e4 LT	343	#ifdef CONFIG_64BIT_PHYS_ADDR
1da177e4 LT	344	extern int remap_pfn_range(struct vm_area_struct *vma, unsigned long from, unsigned long pfn, unsigned long size, pgprot_t prot);
1da177e4 LT	345
1da177e4 LT	346	static inline int io_remap_pfn_range(struct vm_area_struct *vma,
	347	unsigned long vaddr,
	348	unsigned long pfn,
	349	unsigned long size,
	350	pgprot_t prot)
	351	{
	352	phys_t phys_addr_high = fixup_bigphys_addr(pfn << PAGE_SHIFT, size);
ac5d8c02	353	return remap_pfn_range(vma, vaddr, phys_addr_high >> PAGE_SHIFT, size, prot);
1da177e4 LT	354	}
1da177e4 LT	355	#else
1da177e4 LT	356	#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
	357	remap_pfn_range(vma, vaddr, pfn, size, prot)
	358	#endif
	359
1da177e4 LT	360	#include <asm-generic/pgtable.h>
	361
	362	/*
	363	* We provide our own get_unmapped area to cope with the virtual aliasing
	364	* constraints placed on us by the cache architecture.
	365	*/
	366	#define HAVE_ARCH_UNMAPPED_AREA
	367
	368	/*
	369	* No page table caches to initialise
	370	*/
	371	#define pgtable_cache_init() do { } while (0)
	372
	373	#endif /* _ASM_PGTABLE_H */