[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_MOVE_PTE
#define move_pte(pte, prot, old_addr, new_addr)				\
({									\
 	pte_t newpte = (pte);						\
	if (pte_present(pte) && pfn_valid(pte_pfn(pte)) &&		\
			pte_page(pte) == ZERO_PAGE(old_addr))		\
		newpte = mk_pte(ZERO_PAGE(new_addr), (prot));		\
	newpte;								\
})

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)

#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	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_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);
}

#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
0b0968a3 DM	73	#define __HAVE_ARCH_MOVE_PTE
	74	#define move_pte(pte, prot, old_addr, new_addr) \
	75	({ \
	76	pte_t newpte = (pte); \
	77	if (pte_present(pte) && pfn_valid(pte_pfn(pte)) && \
	78	pte_page(pte) == ZERO_PAGE(old_addr)) \
	79	newpte = mk_pte(ZERO_PAGE(new_addr), (prot)); \
	80	newpte; \
	81	})
8b1f3124	82
1da177e4 LT	83	extern void paging_init(void);
	84
	85	/*
	86	* Conversion functions: convert a page and protection to a page entry,
	87	* and a page entry and page directory to the page they refer to.
	88	*/
1da177e4 LT	89	#define pmd_phys(pmd) (pmd_val(pmd) - PAGE_OFFSET)
	90	#define pmd_page(pmd) (pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT))
	91	#define pmd_page_kernel(pmd) pmd_val(pmd)
	92
6e760c8d	93	#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32_R1)
6e953891 SS	94
	95	#define pte_none(pte) (!(((pte).pte_low \| (pte).pte_high) & ~_PAGE_GLOBAL))
	96	#define pte_present(pte) ((pte).pte_low & _PAGE_PRESENT)
	97
1da177e4 LT	98	static inline void set_pte(pte_t *ptep, pte_t pte)
	99	{
	100	ptep->pte_high = pte.pte_high;
	101	smp_wmb();
	102	ptep->pte_low = pte.pte_low;
	103	//printk("pte_high %x pte_low %x\n", ptep->pte_high, ptep->pte_low);
	104
6e953891	105	if (pte.pte_low & _PAGE_GLOBAL) {
1da177e4 LT	106	pte_t *buddy = ptep_buddy(ptep);
	107	/*
	108	* Make sure the buddy is global too (if it's !none,
	109	* it better already be global)
	110	*/
6e953891 SS	111	if (pte_none(*buddy)) {
	112	buddy->pte_low \|= _PAGE_GLOBAL;
	113	buddy->pte_high \|= _PAGE_GLOBAL;
	114	}
1da177e4 LT	115	}
	116	}
	117	#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
	118
	119	static inline void pte_clear(struct mm_struct mm, unsigned long addr, pte_t ptep)
	120	{
6e953891 SS	121	pte_t null = __pte(0);
6e953891 SS	122
1da177e4	123	/* Preserve global status for the pair */
6e953891 SS	124	if (ptep_buddy(ptep)->pte_low & _PAGE_GLOBAL)
	125	null.pte_low = null.pte_high = _PAGE_GLOBAL;
	126
	127	set_pte_at(mm, addr, ptep, null);
1da177e4 LT	128	}
1da177e4 LT	129	#else
6e953891 SS	130
	131	#define pte_none(pte) (!(pte_val(pte) & ~_PAGE_GLOBAL))
	132	#define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT)
	133
1da177e4 LT	134	/*
	135	* Certain architectures need to do special things when pte's
	136	* within a page table are directly modified. Thus, the following
	137	* hook is made available.
	138	*/
	139	static inline void set_pte(pte_t *ptep, pte_t pteval)
	140	{
	141	*ptep = pteval;
	142	#if !defined(CONFIG_CPU_R3000) && !defined(CONFIG_CPU_TX39XX)
	143	if (pte_val(pteval) & _PAGE_GLOBAL) {
	144	pte_t *buddy = ptep_buddy(ptep);
	145	/*
	146	* Make sure the buddy is global too (if it's !none,
	147	* it better already be global)
	148	*/
	149	if (pte_none(*buddy))
	150	pte_val(buddy) = pte_val(buddy) \| _PAGE_GLOBAL;
	151	}
	152	#endif
	153	}
	154	#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
	155
	156	static inline void pte_clear(struct mm_struct mm, unsigned long addr, pte_t ptep)
	157	{
	158	#if !defined(CONFIG_CPU_R3000) && !defined(CONFIG_CPU_TX39XX)
	159	/* Preserve global status for the pair */
	160	if (pte_val(*ptep_buddy(ptep)) & _PAGE_GLOBAL)
	161	set_pte_at(mm, addr, ptep, __pte(_PAGE_GLOBAL));
	162	else
	163	#endif
	164	set_pte_at(mm, addr, ptep, __pte(0));
	165	}
	166	#endif
	167
	168	/*
c6e8b587	169	* (pmds are folded into puds so this doesn't get actually called,
1da177e4 LT	170	* but the define is needed for a generic inline function.)
	171	*/
	172	#define set_pmd(pmdptr, pmdval) do { *(pmdptr) = (pmdval); } while(0)
c6e8b587 RB	173
	174	#ifdef CONFIG_64BIT
	175	/*
	176	* (puds are folded into pgds so this doesn't get actually called,
	177	* but the define is needed for a generic inline function.)
	178	*/
	179	#define set_pud(pudptr, pudval) do { *(pudptr) = (pudval); } while(0)
	180	#endif
1da177e4 LT	181
	182	#define PGD_T_LOG2 ffz(~sizeof(pgd_t))
	183	#define PMD_T_LOG2 ffz(~sizeof(pmd_t))
	184	#define PTE_T_LOG2 ffz(~sizeof(pte_t))
	185
	186	extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
	187
	188	/*
	189	* The following only work if pte_present() is true.
	190	* Undefined behaviour if not..
	191	*/
	192	static inline int pte_user(pte_t pte) { BUG(); return 0; }
6e760c8d	193	#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32_R1)
6e953891 SS	194	static inline int pte_read(pte_t pte) { return pte.pte_low & _PAGE_READ; }
	195	static inline int pte_write(pte_t pte) { return pte.pte_low & _PAGE_WRITE; }
	196	static inline int pte_dirty(pte_t pte) { return pte.pte_low & _PAGE_MODIFIED; }
	197	static inline int pte_young(pte_t pte) { return pte.pte_low & _PAGE_ACCESSED; }
	198	static inline int pte_file(pte_t pte) { return pte.pte_low & _PAGE_FILE; }
	199
1da177e4 LT	200	static inline pte_t pte_wrprotect(pte_t pte)
1da177e4 LT	201	{
6e953891 SS	202	pte.pte_low &= ~(_PAGE_WRITE \| _PAGE_SILENT_WRITE);
6e953891 SS	203	pte.pte_high &= ~_PAGE_SILENT_WRITE;
1da177e4 LT	204	return pte;
	205	}
	206
	207	static inline pte_t pte_rdprotect(pte_t pte)
	208	{
6e953891 SS	209	pte.pte_low &= ~(_PAGE_READ \| _PAGE_SILENT_READ);
6e953891 SS	210	pte.pte_high &= ~_PAGE_SILENT_READ;
1da177e4 LT	211	return pte;
	212	}
	213
	214	static inline pte_t pte_mkclean(pte_t pte)
	215	{
6e953891 SS	216	pte.pte_low &= ~(_PAGE_MODIFIED \| _PAGE_SILENT_WRITE);
6e953891 SS	217	pte.pte_high &= ~_PAGE_SILENT_WRITE;
1da177e4 LT	218	return pte;
	219	}
	220
	221	static inline pte_t pte_mkold(pte_t pte)
	222	{
6e953891 SS	223	pte.pte_low &= ~(_PAGE_ACCESSED \| _PAGE_SILENT_READ);
6e953891 SS	224	pte.pte_high &= ~_PAGE_SILENT_READ;
1da177e4 LT	225	return pte;
	226	}
	227
	228	static inline pte_t pte_mkwrite(pte_t pte)
	229	{
6e953891 SS	230	pte.pte_low \|= _PAGE_WRITE;
	231	if (pte.pte_low & _PAGE_MODIFIED) {
	232	pte.pte_low \|= _PAGE_SILENT_WRITE;
	233	pte.pte_high \|= _PAGE_SILENT_WRITE;
1da177e4 LT	234	}
	235	return pte;
	236	}
	237
	238	static inline pte_t pte_mkread(pte_t pte)
	239	{
6e953891 SS	240	pte.pte_low \|= _PAGE_READ;
	241	if (pte.pte_low & _PAGE_ACCESSED) {
	242	pte.pte_low \|= _PAGE_SILENT_READ;
	243	pte.pte_high \|= _PAGE_SILENT_READ;
1da177e4 LT	244	}
	245	return pte;
	246	}
	247
	248	static inline pte_t pte_mkdirty(pte_t pte)
	249	{
6e953891 SS	250	pte.pte_low \|= _PAGE_MODIFIED;
	251	if (pte.pte_low & _PAGE_WRITE) {
	252	pte.pte_low \|= _PAGE_SILENT_WRITE;
	253	pte.pte_high \|= _PAGE_SILENT_WRITE;
1da177e4 LT	254	}
	255	return pte;
	256	}
	257
	258	static inline pte_t pte_mkyoung(pte_t pte)
	259	{
6e953891 SS	260	pte.pte_low \|= _PAGE_ACCESSED;
	261	if (pte.pte_low & _PAGE_READ)
	262	pte.pte_low \|= _PAGE_SILENT_READ;
	263	pte.pte_high \|= _PAGE_SILENT_READ;
1da177e4 LT	264	return pte;
	265	}
	266	#else
	267	static inline int pte_read(pte_t pte) { return pte_val(pte) & _PAGE_READ; }
	268	static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_WRITE; }
	269	static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_MODIFIED; }
	270	static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; }
	271	static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE; }
	272
	273	static inline pte_t pte_wrprotect(pte_t pte)
	274	{
	275	pte_val(pte) &= ~(_PAGE_WRITE \| _PAGE_SILENT_WRITE);
	276	return pte;
	277	}
	278
	279	static inline pte_t pte_rdprotect(pte_t pte)
	280	{
	281	pte_val(pte) &= ~(_PAGE_READ \| _PAGE_SILENT_READ);
	282	return pte;
	283	}
	284
	285	static inline pte_t pte_mkclean(pte_t pte)
	286	{
	287	pte_val(pte) &= ~(_PAGE_MODIFIED\|_PAGE_SILENT_WRITE);
	288	return pte;
	289	}
	290
	291	static inline pte_t pte_mkold(pte_t pte)
	292	{
	293	pte_val(pte) &= ~(_PAGE_ACCESSED\|_PAGE_SILENT_READ);
	294	return pte;
	295	}
	296
	297	static inline pte_t pte_mkwrite(pte_t pte)
	298	{
	299	pte_val(pte) \|= _PAGE_WRITE;
	300	if (pte_val(pte) & _PAGE_MODIFIED)
	301	pte_val(pte) \|= _PAGE_SILENT_WRITE;
	302	return pte;
	303	}
	304
	305	static inline pte_t pte_mkread(pte_t pte)
	306	{
	307	pte_val(pte) \|= _PAGE_READ;
	308	if (pte_val(pte) & _PAGE_ACCESSED)
	309	pte_val(pte) \|= _PAGE_SILENT_READ;
	310	return pte;
	311	}
	312
	313	static inline pte_t pte_mkdirty(pte_t pte)
	314	{
	315	pte_val(pte) \|= _PAGE_MODIFIED;
	316	if (pte_val(pte) & _PAGE_WRITE)
	317	pte_val(pte) \|= _PAGE_SILENT_WRITE;
	318	return pte;
	319	}
	320
	321	static inline pte_t pte_mkyoung(pte_t pte)
	322	{
	323	pte_val(pte) \|= _PAGE_ACCESSED;
	324	if (pte_val(pte) & _PAGE_READ)
	325	pte_val(pte) \|= _PAGE_SILENT_READ;
	326	return pte;
	327	}
328	#endif
329
330	/*
331	* Macro to make mark a page protection value as "uncacheable". Note
332	* that "protection" is really a misnomer here as the protection value
333	* contains the memory attribute bits, dirty bits, and various other
334	* bits as well.
335	*/
336	#define pgprot_noncached pgprot_noncached
337
338	static inline pgprot_t pgprot_noncached(pgprot_t _prot)
339	{
340	unsigned long prot = pgprot_val(_prot);
341
342	prot = (prot & ~_CACHE_MASK) \| _CACHE_UNCACHED;
343
344	return __pgprot(prot);
345	}
346
347	/*
348	* Conversion functions: convert a page and protection to a page entry,
349	* and a page entry and page directory to the page they refer to.
350	*/
351	#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
352
6e760c8d	353	#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32_R1)
1da177e4 LT	354	static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
1da177e4 LT	355	{
79e0bc37 SS	356	pte.pte_low &= _PAGE_CHG_MASK;
	357	pte.pte_high &= ~0x3f;
	358	pte.pte_low \|= pgprot_val(newprot);
1da177e4 LT	359	pte.pte_high \|= pgprot_val(newprot) & 0x3f;
	360	return pte;
	361	}
	362	#else
	363	static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
	364	{
	365	return __pte((pte_val(pte) & _PAGE_CHG_MASK) \| pgprot_val(newprot));
	366	}
	367	#endif
	368
	369
	370	extern void __update_tlb(struct vm_area_struct *vma, unsigned long address,
	371	pte_t pte);
	372	extern void __update_cache(struct vm_area_struct *vma, unsigned long address,
	373	pte_t pte);
	374
	375	static inline void update_mmu_cache(struct vm_area_struct *vma,
	376	unsigned long address, pte_t pte)
	377	{
	378	__update_tlb(vma, address, pte);
	379	__update_cache(vma, address, pte);
	380	}
	381
b4819b59	382	#ifndef CONFIG_NEED_MULTIPLE_NODES
1da177e4 LT	383	#define kern_addr_valid(addr) (1)
	384	#endif
	385
	386	#ifdef CONFIG_64BIT_PHYS_ADDR
1da177e4 LT	387	extern int remap_pfn_range(struct vm_area_struct *vma, unsigned long from, unsigned long pfn, unsigned long size, pgprot_t prot);
1da177e4 LT	388
1da177e4 LT	389	static inline int io_remap_pfn_range(struct vm_area_struct *vma,
	390	unsigned long vaddr,
	391	unsigned long pfn,
	392	unsigned long size,
	393	pgprot_t prot)
	394	{
	395	phys_t phys_addr_high = fixup_bigphys_addr(pfn << PAGE_SHIFT, size);
ac5d8c02	396	return remap_pfn_range(vma, vaddr, phys_addr_high >> PAGE_SHIFT, size, prot);
1da177e4 LT	397	}
1da177e4 LT	398	#else
1da177e4 LT	399	#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
	400	remap_pfn_range(vma, vaddr, pfn, size, prot)
	401	#endif
	402
	403	#define MK_IOSPACE_PFN(space, pfn) (pfn)
	404	#define GET_IOSPACE(pfn) 0
	405	#define GET_PFN(pfn) (pfn)
	406
	407	#include <asm-generic/pgtable.h>
	408
	409	/*
	410	* We provide our own get_unmapped area to cope with the virtual aliasing
	411	* constraints placed on us by the cache architecture.
	412	*/
	413	#define HAVE_ARCH_UNMAPPED_AREA
	414
	415	/*
	416	* No page table caches to initialise
	417	*/
	418	#define pgtable_cache_init() do { } while (0)
	419
	420	#endif /* _ASM_PGTABLE_H */