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