[deliverable/linux.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

#include <linux/config.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>

#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(empty_zero_page + (((unsigned long)(vaddr)) & zero_page_mask)))

#define __HAVE_ARCH_MULTIPLE_ZERO_PAGE

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 page_pte(page)		page_pte_prot(page, __pgprot(0))
#define pmd_phys(pmd)		(pmd_val(pmd) - PAGE_OFFSET)
#define pmd_page(pmd)		(pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT))
#define pmd_page_kernel(pmd)	pmd_val(pmd)

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

#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32_R1)
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_val(pte) & _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;
	}
}
#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)
{
	/* Preserve global status for the pair */
	if (pte_val(*ptep_buddy(ptep)) & _PAGE_GLOBAL)
		set_pte_at(mm, addr, ptep, __pte(_PAGE_GLOBAL));
	else
		set_pte_at(mm, addr, ptep, __pte(0));
}
#else
/*
 * 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	ffz(~sizeof(pgd_t))
#define PMD_T_LOG2	ffz(~sizeof(pmd_t))
#define PTE_T_LOG2	ffz(~sizeof(pte_t))

extern pgd_t swapper_pg_dir[PTRS_PER_PGD];

/*
 * The following only work if pte_present() is true.
 * Undefined behaviour if not..
 */
static inline int pte_user(pte_t pte)	{ BUG(); return 0; }
#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32_R1)
static inline int pte_read(pte_t pte)	{ return (pte).pte_low & _PAGE_READ; }
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_rdprotect(pte_t pte)
{
	(pte).pte_low &= ~(_PAGE_READ | _PAGE_SILENT_READ);
	(pte).pte_high &= ~_PAGE_SILENT_READ;
	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_mkread(pte_t pte)
{
	(pte).pte_low |= _PAGE_READ;
	if ((pte).pte_low & _PAGE_ACCESSED) {
		(pte).pte_low |= _PAGE_SILENT_READ;
		(pte).pte_high |= _PAGE_SILENT_READ;
	}
	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_read(pte_t pte)	{ return pte_val(pte) & _PAGE_READ; }
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_rdprotect(pte_t pte)
{
	pte_val(pte) &= ~(_PAGE_READ | _PAGE_SILENT_READ);
	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_mkread(pte_t pte)
{
	pte_val(pte) |= _PAGE_READ;
	if (pte_val(pte) & _PAGE_ACCESSED)
		pte_val(pte) |= _PAGE_SILENT_READ;
	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_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);
}

#ifndef CONFIG_NEED_MULTIPLE_NODES
#define kern_addr_valid(addr)	(1)
#endif

#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

#define MK_IOSPACE_PFN(space, pfn)	(pfn)
#define GET_IOSPACE(pfn)		0
#define GET_PFN(pfn)			(pfn)

#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
1da177e4	11	#include <linux/config.h>
875d43e7	12	#ifdef CONFIG_32BIT
1da177e4 LT	13	#include <asm/pgtable-32.h>
1da177e4 LT	14	#endif
875d43e7	15	#ifdef CONFIG_64BIT
1da177e4 LT	16	#include <asm/pgtable-64.h>
	17	#endif
	18
f10fae02	19	#include <asm/io.h>
1da177e4 LT	20	#include <asm/pgtable-bits.h>
	21
	22	#define PAGE_NONE __pgprot(_PAGE_PRESENT \| _CACHE_CACHABLE_NONCOHERENT)
	23	#define PAGE_SHARED __pgprot(_PAGE_PRESENT \| _PAGE_READ \| _PAGE_WRITE \| \
	24	PAGE_CACHABLE_DEFAULT)
	25	#define PAGE_COPY __pgprot(_PAGE_PRESENT \| _PAGE_READ \| \
	26	PAGE_CACHABLE_DEFAULT)
	27	#define PAGE_READONLY __pgprot(_PAGE_PRESENT \| _PAGE_READ \| \
	28	PAGE_CACHABLE_DEFAULT)
	29	#define PAGE_KERNEL __pgprot(_PAGE_PRESENT \| __READABLE \| __WRITEABLE \| \
	30	_PAGE_GLOBAL \| PAGE_CACHABLE_DEFAULT)
	31	#define PAGE_USERIO __pgprot(_PAGE_PRESENT \| _PAGE_READ \| _PAGE_WRITE \| \
	32	PAGE_CACHABLE_DEFAULT)
	33	#define PAGE_KERNEL_UNCACHED __pgprot(_PAGE_PRESENT \| __READABLE \| \
	34	__WRITEABLE \| _PAGE_GLOBAL \| _CACHE_UNCACHED)
	35
	36	/*
	37	* MIPS can't do page protection for execute, and considers that the same like
	38	* read. Also, write permissions imply read permissions. This is the closest
	39	* we can get by reasonable means..
	40	*/
	41	#define __P000 PAGE_NONE
	42	#define __P001 PAGE_READONLY
	43	#define __P010 PAGE_COPY
	44	#define __P011 PAGE_COPY
	45	#define __P100 PAGE_READONLY
	46	#define __P101 PAGE_READONLY
	47	#define __P110 PAGE_COPY
	48	#define __P111 PAGE_COPY
	49
	50	#define __S000 PAGE_NONE
	51	#define __S001 PAGE_READONLY
	52	#define __S010 PAGE_SHARED
	53	#define __S011 PAGE_SHARED
	54	#define __S100 PAGE_READONLY
	55	#define __S101 PAGE_READONLY
	56	#define __S110 PAGE_SHARED
	57	#define __S111 PAGE_SHARED
	58
	59	/*
	60	* ZERO_PAGE is a global shared page that is always zero; used
	61	* for zero-mapped memory areas etc..
	62	*/
	63
	64	extern unsigned long empty_zero_page;
	65	extern unsigned long zero_page_mask;
	66
	67	#define ZERO_PAGE(vaddr) \
	68	(virt_to_page(empty_zero_page + (((unsigned long)(vaddr)) & zero_page_mask)))
	69
8b1f3124 NP	70	#define __HAVE_ARCH_MULTIPLE_ZERO_PAGE
8b1f3124 NP	71
1da177e4 LT	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	*/
	78	#define page_pte(page) page_pte_prot(page, __pgprot(0))
	79	#define pmd_phys(pmd) (pmd_val(pmd) - PAGE_OFFSET)
	80	#define pmd_page(pmd) (pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT))
	81	#define pmd_page_kernel(pmd) pmd_val(pmd)
	82
	83	#define pte_none(pte) (!(pte_val(pte) & ~_PAGE_GLOBAL))
	84	#define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT)
	85
6e760c8d	86	#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32_R1)
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
	94	if (pte_val(pte) & _PAGE_GLOBAL) {
	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	*/
	100	if (pte_none(*buddy))
	101	buddy->pte_low \|= _PAGE_GLOBAL;
	102	}
	103	}
	104	#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
	105
	106	static inline void pte_clear(struct mm_struct mm, unsigned long addr, pte_t ptep)
	107	{
	108	/* Preserve global status for the pair */
	109	if (pte_val(*ptep_buddy(ptep)) & _PAGE_GLOBAL)
	110	set_pte_at(mm, addr, ptep, __pte(_PAGE_GLOBAL));
	111	else
	112	set_pte_at(mm, addr, ptep, __pte(0));
	113	}
	114	#else
	115	/*
	116	* Certain architectures need to do special things when pte's
	117	* within a page table are directly modified. Thus, the following
	118	* hook is made available.
	119	*/
	120	static inline void set_pte(pte_t *ptep, pte_t pteval)
	121	{
	122	*ptep = pteval;
	123	#if !defined(CONFIG_CPU_R3000) && !defined(CONFIG_CPU_TX39XX)
	124	if (pte_val(pteval) & _PAGE_GLOBAL) {
	125	pte_t *buddy = ptep_buddy(ptep);
	126	/*
	127	* Make sure the buddy is global too (if it's !none,
	128	* it better already be global)
	129	*/
	130	if (pte_none(*buddy))
	131	pte_val(buddy) = pte_val(buddy) \| _PAGE_GLOBAL;
	132	}
	133	#endif
	134	}
	135	#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
	136
	137	static inline void pte_clear(struct mm_struct mm, unsigned long addr, pte_t ptep)
	138	{
	139	#if !defined(CONFIG_CPU_R3000) && !defined(CONFIG_CPU_TX39XX)
	140	/* Preserve global status for the pair */
	141	if (pte_val(*ptep_buddy(ptep)) & _PAGE_GLOBAL)
	142	set_pte_at(mm, addr, ptep, __pte(_PAGE_GLOBAL));
	143	else
	144	#endif
	145	set_pte_at(mm, addr, ptep, __pte(0));
	146	}
	147	#endif
	148
	149	/*
c6e8b587	150	* (pmds are folded into puds so this doesn't get actually called,
1da177e4 LT	151	* but the define is needed for a generic inline function.)
	152	*/
	153	#define set_pmd(pmdptr, pmdval) do { *(pmdptr) = (pmdval); } while(0)
c6e8b587 RB	154
	155	#ifdef CONFIG_64BIT
	156	/*
	157	* (puds are folded into pgds so this doesn't get actually called,
	158	* but the define is needed for a generic inline function.)
	159	*/
	160	#define set_pud(pudptr, pudval) do { *(pudptr) = (pudval); } while(0)
	161	#endif
1da177e4 LT	162
	163	#define PGD_T_LOG2 ffz(~sizeof(pgd_t))
	164	#define PMD_T_LOG2 ffz(~sizeof(pmd_t))
	165	#define PTE_T_LOG2 ffz(~sizeof(pte_t))
	166
	167	extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
	168
	169	/*
	170	* The following only work if pte_present() is true.
	171	* Undefined behaviour if not..
	172	*/
	173	static inline int pte_user(pte_t pte) { BUG(); return 0; }
6e760c8d	174	#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32_R1)
1da177e4 LT	175	static inline int pte_read(pte_t pte) { return (pte).pte_low & _PAGE_READ; }
	176	static inline int pte_write(pte_t pte) { return (pte).pte_low & _PAGE_WRITE; }
	177	static inline int pte_dirty(pte_t pte) { return (pte).pte_low & _PAGE_MODIFIED; }
	178	static inline int pte_young(pte_t pte) { return (pte).pte_low & _PAGE_ACCESSED; }
	179	static inline int pte_file(pte_t pte) { return (pte).pte_low & _PAGE_FILE; }
	180	static inline pte_t pte_wrprotect(pte_t pte)
	181	{
	182	(pte).pte_low &= ~(_PAGE_WRITE \| _PAGE_SILENT_WRITE);
	183	(pte).pte_high &= ~_PAGE_SILENT_WRITE;
	184	return pte;
	185	}
	186
	187	static inline pte_t pte_rdprotect(pte_t pte)
	188	{
	189	(pte).pte_low &= ~(_PAGE_READ \| _PAGE_SILENT_READ);
	190	(pte).pte_high &= ~_PAGE_SILENT_READ;
	191	return pte;
	192	}
	193
	194	static inline pte_t pte_mkclean(pte_t pte)
	195	{
	196	(pte).pte_low &= ~(_PAGE_MODIFIED\|_PAGE_SILENT_WRITE);
	197	(pte).pte_high &= ~_PAGE_SILENT_WRITE;
	198	return pte;
	199	}
	200
	201	static inline pte_t pte_mkold(pte_t pte)
	202	{
	203	(pte).pte_low &= ~(_PAGE_ACCESSED\|_PAGE_SILENT_READ);
	204	(pte).pte_high &= ~_PAGE_SILENT_READ;
	205	return pte;
	206	}
	207
	208	static inline pte_t pte_mkwrite(pte_t pte)
	209	{
	210	(pte).pte_low \|= _PAGE_WRITE;
	211	if ((pte).pte_low & _PAGE_MODIFIED) {
	212	(pte).pte_low \|= _PAGE_SILENT_WRITE;
	213	(pte).pte_high \|= _PAGE_SILENT_WRITE;
	214	}
	215	return pte;
	216	}
	217
	218	static inline pte_t pte_mkread(pte_t pte)
	219	{
	220	(pte).pte_low \|= _PAGE_READ;
	221	if ((pte).pte_low & _PAGE_ACCESSED) {
	222	(pte).pte_low \|= _PAGE_SILENT_READ;
	223	(pte).pte_high \|= _PAGE_SILENT_READ;
	224	}
	225	return pte;
	226	}
	227
	228	static inline pte_t pte_mkdirty(pte_t pte)
	229	{
	230	(pte).pte_low \|= _PAGE_MODIFIED;
	231	if ((pte).pte_low & _PAGE_WRITE) {
	232	(pte).pte_low \|= _PAGE_SILENT_WRITE;
	233	(pte).pte_high \|= _PAGE_SILENT_WRITE;
	234	}
	235	return pte;
	236	}
	237
	238	static inline pte_t pte_mkyoung(pte_t pte)
239	{
240	(pte).pte_low \|= _PAGE_ACCESSED;
241	if ((pte).pte_low & _PAGE_READ)
242	(pte).pte_low \|= _PAGE_SILENT_READ;
243	(pte).pte_high \|= _PAGE_SILENT_READ;
244	return pte;
245	}
246	#else
247	static inline int pte_read(pte_t pte) { return pte_val(pte) & _PAGE_READ; }
248	static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_WRITE; }
249	static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_MODIFIED; }
250	static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; }
251	static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE; }
252
253	static inline pte_t pte_wrprotect(pte_t pte)
254	{
255	pte_val(pte) &= ~(_PAGE_WRITE \| _PAGE_SILENT_WRITE);
256	return pte;
257	}
258
259	static inline pte_t pte_rdprotect(pte_t pte)
260	{
261	pte_val(pte) &= ~(_PAGE_READ \| _PAGE_SILENT_READ);
262	return pte;
263	}
264
265	static inline pte_t pte_mkclean(pte_t pte)
266	{
267	pte_val(pte) &= ~(_PAGE_MODIFIED\|_PAGE_SILENT_WRITE);
268	return pte;
269	}
270
271	static inline pte_t pte_mkold(pte_t pte)
272	{
273	pte_val(pte) &= ~(_PAGE_ACCESSED\|_PAGE_SILENT_READ);
274	return pte;
275	}
276
277	static inline pte_t pte_mkwrite(pte_t pte)
278	{
279	pte_val(pte) \|= _PAGE_WRITE;
280	if (pte_val(pte) & _PAGE_MODIFIED)
281	pte_val(pte) \|= _PAGE_SILENT_WRITE;
282	return pte;
283	}
284
285	static inline pte_t pte_mkread(pte_t pte)
286	{
287	pte_val(pte) \|= _PAGE_READ;
288	if (pte_val(pte) & _PAGE_ACCESSED)
289	pte_val(pte) \|= _PAGE_SILENT_READ;
290	return pte;
291	}
292
293	static inline pte_t pte_mkdirty(pte_t pte)
294	{
295	pte_val(pte) \|= _PAGE_MODIFIED;
296	if (pte_val(pte) & _PAGE_WRITE)
297	pte_val(pte) \|= _PAGE_SILENT_WRITE;
298	return pte;
299	}
300
301	static inline pte_t pte_mkyoung(pte_t pte)
302	{
303	pte_val(pte) \|= _PAGE_ACCESSED;
304	if (pte_val(pte) & _PAGE_READ)
305	pte_val(pte) \|= _PAGE_SILENT_READ;
306	return pte;
307	}
308	#endif
309
310	/*
311	* Macro to make mark a page protection value as "uncacheable". Note
312	* that "protection" is really a misnomer here as the protection value
313	* contains the memory attribute bits, dirty bits, and various other
314	* bits as well.
315	*/
316	#define pgprot_noncached pgprot_noncached
317
318	static inline pgprot_t pgprot_noncached(pgprot_t _prot)
319	{
320	unsigned long prot = pgprot_val(_prot);
321
322	prot = (prot & ~_CACHE_MASK) \| _CACHE_UNCACHED;
323
324	return __pgprot(prot);
325	}
326
327	/*
328	* Conversion functions: convert a page and protection to a page entry,
329	* and a page entry and page directory to the page they refer to.
330	*/
331	#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
332
6e760c8d	333	#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32_R1)
1da177e4 LT	334	static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
	335	{
	336	pte.pte_low &= _PAGE_CHG_MASK;
	337	pte.pte_low \|= pgprot_val(newprot);
	338	pte.pte_high \|= pgprot_val(newprot) & 0x3f;
	339	return pte;
	340	}
	341	#else
	342	static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
	343	{
	344	return __pte((pte_val(pte) & _PAGE_CHG_MASK) \| pgprot_val(newprot));
	345	}
	346	#endif
	347
	348
	349	extern void __update_tlb(struct vm_area_struct *vma, unsigned long address,
	350	pte_t pte);
	351	extern void __update_cache(struct vm_area_struct *vma, unsigned long address,
	352	pte_t pte);
	353
	354	static inline void update_mmu_cache(struct vm_area_struct *vma,
	355	unsigned long address, pte_t pte)
	356	{
	357	__update_tlb(vma, address, pte);
	358	__update_cache(vma, address, pte);
	359	}
	360
b4819b59	361	#ifndef CONFIG_NEED_MULTIPLE_NODES
1da177e4 LT	362	#define kern_addr_valid(addr) (1)
	363	#endif
	364
	365	#ifdef CONFIG_64BIT_PHYS_ADDR
1da177e4 LT	366	extern int remap_pfn_range(struct vm_area_struct *vma, unsigned long from, unsigned long pfn, unsigned long size, pgprot_t prot);
1da177e4 LT	367
1da177e4 LT	368	static inline int io_remap_pfn_range(struct vm_area_struct *vma,
	369	unsigned long vaddr,
	370	unsigned long pfn,
	371	unsigned long size,
	372	pgprot_t prot)
	373	{
	374	phys_t phys_addr_high = fixup_bigphys_addr(pfn << PAGE_SHIFT, size);
ac5d8c02	375	return remap_pfn_range(vma, vaddr, phys_addr_high >> PAGE_SHIFT, size, prot);
1da177e4 LT	376	}
1da177e4 LT	377	#else
1da177e4 LT	378	#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
	379	remap_pfn_range(vma, vaddr, pfn, size, prot)
	380	#endif
	381
	382	#define MK_IOSPACE_PFN(space, pfn) (pfn)
	383	#define GET_IOSPACE(pfn) 0
	384	#define GET_PFN(pfn) (pfn)
	385
	386	#include <asm-generic/pgtable.h>
	387
	388	/*
	389	* We provide our own get_unmapped area to cope with the virtual aliasing
	390	* constraints placed on us by the cache architecture.
	391	*/
	392	#define HAVE_ARCH_UNMAPPED_AREA
	393
	394	/*
	395	* No page table caches to initialise
	396	*/
	397	#define pgtable_cache_init() do { } while (0)
	398
	399	#endif /* _ASM_PGTABLE_H */