[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>

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(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 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>
1da177e4 LT	21
8c65b4a6 TS	22	struct mm_struct;
	23	struct vm_area_struct;
	24
1da177e4 LT	25	#define PAGE_NONE __pgprot(_PAGE_PRESENT \| _CACHE_CACHABLE_NONCOHERENT)
	26	#define PAGE_SHARED __pgprot(_PAGE_PRESENT \| _PAGE_READ \| _PAGE_WRITE \| \
	27	PAGE_CACHABLE_DEFAULT)
	28	#define PAGE_COPY __pgprot(_PAGE_PRESENT \| _PAGE_READ \| \
	29	PAGE_CACHABLE_DEFAULT)
	30	#define PAGE_READONLY __pgprot(_PAGE_PRESENT \| _PAGE_READ \| \
	31	PAGE_CACHABLE_DEFAULT)
	32	#define PAGE_KERNEL __pgprot(_PAGE_PRESENT \| __READABLE \| __WRITEABLE \| \
	33	_PAGE_GLOBAL \| PAGE_CACHABLE_DEFAULT)
	34	#define PAGE_USERIO __pgprot(_PAGE_PRESENT \| _PAGE_READ \| _PAGE_WRITE \| \
	35	PAGE_CACHABLE_DEFAULT)
	36	#define PAGE_KERNEL_UNCACHED __pgprot(_PAGE_PRESENT \| __READABLE \| \
	37	__WRITEABLE \| _PAGE_GLOBAL \| _CACHE_UNCACHED)
	38
	39	/*
	40	* MIPS can't do page protection for execute, and considers that the same like
	41	* read. Also, write permissions imply read permissions. This is the closest
	42	* we can get by reasonable means..
	43	*/
	44	#define __P000 PAGE_NONE
	45	#define __P001 PAGE_READONLY
	46	#define __P010 PAGE_COPY
	47	#define __P011 PAGE_COPY
	48	#define __P100 PAGE_READONLY
	49	#define __P101 PAGE_READONLY
	50	#define __P110 PAGE_COPY
	51	#define __P111 PAGE_COPY
	52
	53	#define __S000 PAGE_NONE
	54	#define __S001 PAGE_READONLY
	55	#define __S010 PAGE_SHARED
	56	#define __S011 PAGE_SHARED
	57	#define __S100 PAGE_READONLY
	58	#define __S101 PAGE_READONLY
	59	#define __S110 PAGE_SHARED
	60	#define __S111 PAGE_SHARED
	61
	62	/*
	63	* ZERO_PAGE is a global shared page that is always zero; used
	64	* for zero-mapped memory areas etc..
	65	*/
	66
	67	extern unsigned long empty_zero_page;
	68	extern unsigned long zero_page_mask;
	69
	70	#define ZERO_PAGE(vaddr) \
	71	(virt_to_page(empty_zero_page + (((unsigned long)(vaddr)) & zero_page_mask)))
	72
8b1f3124 NP	73	#define __HAVE_ARCH_MULTIPLE_ZERO_PAGE
8b1f3124 NP	74
1da177e4 LT	75	extern void paging_init(void);
	76
	77	/*
	78	* Conversion functions: convert a page and protection to a page entry,
	79	* and a page entry and page directory to the page they refer to.
	80	*/
1da177e4 LT	81	#define pmd_phys(pmd) (pmd_val(pmd) - PAGE_OFFSET)
	82	#define pmd_page(pmd) (pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT))
	83	#define pmd_page_kernel(pmd) pmd_val(pmd)
	84
	85	#define pte_none(pte) (!(pte_val(pte) & ~_PAGE_GLOBAL))
	86	#define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT)
	87
6e760c8d	88	#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32_R1)
1da177e4 LT	89	static inline void set_pte(pte_t *ptep, pte_t pte)
	90	{
	91	ptep->pte_high = pte.pte_high;
	92	smp_wmb();
	93	ptep->pte_low = pte.pte_low;
	94	//printk("pte_high %x pte_low %x\n", ptep->pte_high, ptep->pte_low);
	95
	96	if (pte_val(pte) & _PAGE_GLOBAL) {
	97	pte_t *buddy = ptep_buddy(ptep);
	98	/*
	99	* Make sure the buddy is global too (if it's !none,
	100	* it better already be global)
	101	*/
	102	if (pte_none(*buddy))
	103	buddy->pte_low \|= _PAGE_GLOBAL;
	104	}
	105	}
	106	#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
	107
	108	static inline void pte_clear(struct mm_struct mm, unsigned long addr, pte_t ptep)
	109	{
	110	/* Preserve global status for the pair */
	111	if (pte_val(*ptep_buddy(ptep)) & _PAGE_GLOBAL)
	112	set_pte_at(mm, addr, ptep, __pte(_PAGE_GLOBAL));
	113	else
	114	set_pte_at(mm, addr, ptep, __pte(0));
	115	}
	116	#else
	117	/*
	118	* Certain architectures need to do special things when pte's
	119	* within a page table are directly modified. Thus, the following
	120	* hook is made available.
	121	*/
	122	static inline void set_pte(pte_t *ptep, pte_t pteval)
	123	{
	124	*ptep = pteval;
	125	#if !defined(CONFIG_CPU_R3000) && !defined(CONFIG_CPU_TX39XX)
	126	if (pte_val(pteval) & _PAGE_GLOBAL) {
	127	pte_t *buddy = ptep_buddy(ptep);
	128	/*
	129	* Make sure the buddy is global too (if it's !none,
	130	* it better already be global)
	131	*/
	132	if (pte_none(*buddy))
	133	pte_val(buddy) = pte_val(buddy) \| _PAGE_GLOBAL;
	134	}
	135	#endif
	136	}
	137	#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
	138
	139	static inline void pte_clear(struct mm_struct mm, unsigned long addr, pte_t ptep)
	140	{
	141	#if !defined(CONFIG_CPU_R3000) && !defined(CONFIG_CPU_TX39XX)
	142	/* Preserve global status for the pair */
	143	if (pte_val(*ptep_buddy(ptep)) & _PAGE_GLOBAL)
	144	set_pte_at(mm, addr, ptep, __pte(_PAGE_GLOBAL));
	145	else
	146	#endif
	147	set_pte_at(mm, addr, ptep, __pte(0));
	148	}
	149	#endif
	150
	151	/*
c6e8b587	152	* (pmds are folded into puds so this doesn't get actually called,
1da177e4 LT	153	* but the define is needed for a generic inline function.)
	154	*/
	155	#define set_pmd(pmdptr, pmdval) do { *(pmdptr) = (pmdval); } while(0)
c6e8b587 RB	156
	157	#ifdef CONFIG_64BIT
	158	/*
	159	* (puds are folded into pgds so this doesn't get actually called,
	160	* but the define is needed for a generic inline function.)
	161	*/
	162	#define set_pud(pudptr, pudval) do { *(pudptr) = (pudval); } while(0)
	163	#endif
1da177e4 LT	164
	165	#define PGD_T_LOG2 ffz(~sizeof(pgd_t))
	166	#define PMD_T_LOG2 ffz(~sizeof(pmd_t))
	167	#define PTE_T_LOG2 ffz(~sizeof(pte_t))
	168
	169	extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
	170
	171	/*
	172	* The following only work if pte_present() is true.
	173	* Undefined behaviour if not..
	174	*/
	175	static inline int pte_user(pte_t pte) { BUG(); return 0; }
6e760c8d	176	#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32_R1)
1da177e4 LT	177	static inline int pte_read(pte_t pte) { return (pte).pte_low & _PAGE_READ; }
	178	static inline int pte_write(pte_t pte) { return (pte).pte_low & _PAGE_WRITE; }
	179	static inline int pte_dirty(pte_t pte) { return (pte).pte_low & _PAGE_MODIFIED; }
	180	static inline int pte_young(pte_t pte) { return (pte).pte_low & _PAGE_ACCESSED; }
	181	static inline int pte_file(pte_t pte) { return (pte).pte_low & _PAGE_FILE; }
	182	static inline pte_t pte_wrprotect(pte_t pte)
	183	{
	184	(pte).pte_low &= ~(_PAGE_WRITE \| _PAGE_SILENT_WRITE);
	185	(pte).pte_high &= ~_PAGE_SILENT_WRITE;
	186	return pte;
	187	}
	188
	189	static inline pte_t pte_rdprotect(pte_t pte)
	190	{
	191	(pte).pte_low &= ~(_PAGE_READ \| _PAGE_SILENT_READ);
	192	(pte).pte_high &= ~_PAGE_SILENT_READ;
	193	return pte;
	194	}
	195
	196	static inline pte_t pte_mkclean(pte_t pte)
	197	{
	198	(pte).pte_low &= ~(_PAGE_MODIFIED\|_PAGE_SILENT_WRITE);
	199	(pte).pte_high &= ~_PAGE_SILENT_WRITE;
	200	return pte;
	201	}
	202
	203	static inline pte_t pte_mkold(pte_t pte)
	204	{
	205	(pte).pte_low &= ~(_PAGE_ACCESSED\|_PAGE_SILENT_READ);
	206	(pte).pte_high &= ~_PAGE_SILENT_READ;
	207	return pte;
	208	}
	209
	210	static inline pte_t pte_mkwrite(pte_t pte)
	211	{
	212	(pte).pte_low \|= _PAGE_WRITE;
	213	if ((pte).pte_low & _PAGE_MODIFIED) {
	214	(pte).pte_low \|= _PAGE_SILENT_WRITE;
	215	(pte).pte_high \|= _PAGE_SILENT_WRITE;
	216	}
	217	return pte;
	218	}
	219
	220	static inline pte_t pte_mkread(pte_t pte)
	221	{
	222	(pte).pte_low \|= _PAGE_READ;
	223	if ((pte).pte_low & _PAGE_ACCESSED) {
	224	(pte).pte_low \|= _PAGE_SILENT_READ;
	225	(pte).pte_high \|= _PAGE_SILENT_READ;
	226	}
	227	return pte;
	228	}
	229
	230	static inline pte_t pte_mkdirty(pte_t pte)
	231	{
	232	(pte).pte_low \|= _PAGE_MODIFIED;
	233	if ((pte).pte_low & _PAGE_WRITE) {
	234	(pte).pte_low \|= _PAGE_SILENT_WRITE;
	235	(pte).pte_high \|= _PAGE_SILENT_WRITE;
	236	}
	237	return pte;
	238	}
	239
	240	static inline pte_t pte_mkyoung(pte_t pte)
241	{
242	(pte).pte_low \|= _PAGE_ACCESSED;
243	if ((pte).pte_low & _PAGE_READ)
244	(pte).pte_low \|= _PAGE_SILENT_READ;
245	(pte).pte_high \|= _PAGE_SILENT_READ;
246	return pte;
247	}
248	#else
249	static inline int pte_read(pte_t pte) { return pte_val(pte) & _PAGE_READ; }
250	static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_WRITE; }
251	static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_MODIFIED; }
252	static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; }
253	static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE; }
254
255	static inline pte_t pte_wrprotect(pte_t pte)
256	{
257	pte_val(pte) &= ~(_PAGE_WRITE \| _PAGE_SILENT_WRITE);
258	return pte;
259	}
260
261	static inline pte_t pte_rdprotect(pte_t pte)
262	{
263	pte_val(pte) &= ~(_PAGE_READ \| _PAGE_SILENT_READ);
264	return pte;
265	}
266
267	static inline pte_t pte_mkclean(pte_t pte)
268	{
269	pte_val(pte) &= ~(_PAGE_MODIFIED\|_PAGE_SILENT_WRITE);
270	return pte;
271	}
272
273	static inline pte_t pte_mkold(pte_t pte)
274	{
275	pte_val(pte) &= ~(_PAGE_ACCESSED\|_PAGE_SILENT_READ);
276	return pte;
277	}
278
279	static inline pte_t pte_mkwrite(pte_t pte)
280	{
281	pte_val(pte) \|= _PAGE_WRITE;
282	if (pte_val(pte) & _PAGE_MODIFIED)
283	pte_val(pte) \|= _PAGE_SILENT_WRITE;
284	return pte;
285	}
286
287	static inline pte_t pte_mkread(pte_t pte)
288	{
289	pte_val(pte) \|= _PAGE_READ;
290	if (pte_val(pte) & _PAGE_ACCESSED)
291	pte_val(pte) \|= _PAGE_SILENT_READ;
292	return pte;
293	}
294
295	static inline pte_t pte_mkdirty(pte_t pte)
296	{
297	pte_val(pte) \|= _PAGE_MODIFIED;
298	if (pte_val(pte) & _PAGE_WRITE)
299	pte_val(pte) \|= _PAGE_SILENT_WRITE;
300	return pte;
301	}
302
303	static inline pte_t pte_mkyoung(pte_t pte)
304	{
305	pte_val(pte) \|= _PAGE_ACCESSED;
306	if (pte_val(pte) & _PAGE_READ)
307	pte_val(pte) \|= _PAGE_SILENT_READ;
308	return pte;
309	}
310	#endif
311
312	/*
313	* Macro to make mark a page protection value as "uncacheable". Note
314	* that "protection" is really a misnomer here as the protection value
315	* contains the memory attribute bits, dirty bits, and various other
316	* bits as well.
317	*/
318	#define pgprot_noncached pgprot_noncached
319
320	static inline pgprot_t pgprot_noncached(pgprot_t _prot)
321	{
322	unsigned long prot = pgprot_val(_prot);
323
324	prot = (prot & ~_CACHE_MASK) \| _CACHE_UNCACHED;
325
326	return __pgprot(prot);
327	}
328
329	/*
330	* Conversion functions: convert a page and protection to a page entry,
331	* and a page entry and page directory to the page they refer to.
332	*/
333	#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
334
6e760c8d	335	#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32_R1)
1da177e4 LT	336	static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
	337	{
	338	pte.pte_low &= _PAGE_CHG_MASK;
	339	pte.pte_low \|= pgprot_val(newprot);
	340	pte.pte_high \|= pgprot_val(newprot) & 0x3f;
	341	return pte;
	342	}
	343	#else
	344	static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
	345	{
	346	return __pte((pte_val(pte) & _PAGE_CHG_MASK) \| pgprot_val(newprot));
	347	}
	348	#endif
	349
	350
	351	extern void __update_tlb(struct vm_area_struct *vma, unsigned long address,
	352	pte_t pte);
	353	extern void __update_cache(struct vm_area_struct *vma, unsigned long address,
	354	pte_t pte);
	355
	356	static inline void update_mmu_cache(struct vm_area_struct *vma,
	357	unsigned long address, pte_t pte)
	358	{
	359	__update_tlb(vma, address, pte);
	360	__update_cache(vma, address, pte);
	361	}
	362
b4819b59	363	#ifndef CONFIG_NEED_MULTIPLE_NODES
1da177e4 LT	364	#define kern_addr_valid(addr) (1)
	365	#endif
	366
	367	#ifdef CONFIG_64BIT_PHYS_ADDR
1da177e4 LT	368	extern int remap_pfn_range(struct vm_area_struct *vma, unsigned long from, unsigned long pfn, unsigned long size, pgprot_t prot);
1da177e4 LT	369
1da177e4 LT	370	static inline int io_remap_pfn_range(struct vm_area_struct *vma,
	371	unsigned long vaddr,
	372	unsigned long pfn,
	373	unsigned long size,
	374	pgprot_t prot)
	375	{
	376	phys_t phys_addr_high = fixup_bigphys_addr(pfn << PAGE_SHIFT, size);
ac5d8c02	377	return remap_pfn_range(vma, vaddr, phys_addr_high >> PAGE_SHIFT, size, prot);
1da177e4 LT	378	}
1da177e4 LT	379	#else
1da177e4 LT	380	#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
	381	remap_pfn_range(vma, vaddr, pfn, size, prot)
	382	#endif
	383
	384	#define MK_IOSPACE_PFN(space, pfn) (pfn)
	385	#define GET_IOSPACE(pfn) 0
	386	#define GET_PFN(pfn) (pfn)
	387
	388	#include <asm-generic/pgtable.h>
	389
	390	/*
	391	* We provide our own get_unmapped area to cope with the virtual aliasing
	392	* constraints placed on us by the cache architecture.
	393	*/
	394	#define HAVE_ARCH_UNMAPPED_AREA
	395
	396	/*
	397	* No page table caches to initialise
	398	*/
	399	#define pgtable_cache_init() do { } while (0)
	400
	401	#endif /* _ASM_PGTABLE_H */