[linux-2.6-block.git] / arch / mips / include / asm / 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/mm_types.h>
#include <linux/mmzone.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_WRITE | (cpu_has_rixi ? 0 : _PAGE_READ) | \
				 _page_cachable_default)
#define PAGE_COPY	__pgprot(_PAGE_PRESENT | (cpu_has_rixi ? 0 : _PAGE_READ) | \
				 (cpu_has_rixi ?  _PAGE_NO_EXEC : 0) | _page_cachable_default)
#define PAGE_READONLY	__pgprot(_PAGE_PRESENT | (cpu_has_rixi ? 0 : _PAGE_READ) | \
				 _page_cachable_default)
#define PAGE_KERNEL	__pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \
				 _PAGE_GLOBAL | _page_cachable_default)
#define PAGE_KERNEL_NC	__pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \
				 _PAGE_GLOBAL | _CACHE_CACHABLE_NONCOHERENT)
#define PAGE_USERIO	__pgprot(_PAGE_PRESENT | (cpu_has_rixi ? 0 : _PAGE_READ) | _PAGE_WRITE | \
				 _page_cachable_default)
#define PAGE_KERNEL_UNCACHED __pgprot(_PAGE_PRESENT | __READABLE | \
			__WRITEABLE | _PAGE_GLOBAL | _CACHE_UNCACHED)

/*
 * If _PAGE_NO_EXEC is not defined, we can't do page protection for
 * execute, and consider it to be the same as read. Also, write
 * permissions imply read permissions. This is the closest we can get
 * by reasonable means..
 */

/*
 * Dummy values to fill the table in mmap.c
 * The real values will be generated at runtime
 */
#define __P000 __pgprot(0)
#define __P001 __pgprot(0)
#define __P010 __pgprot(0)
#define __P011 __pgprot(0)
#define __P100 __pgprot(0)
#define __P101 __pgprot(0)
#define __P110 __pgprot(0)
#define __P111 __pgprot(0)

#define __S000 __pgprot(0)
#define __S001 __pgprot(0)
#define __S010 __pgprot(0)
#define __S011 __pgprot(0)
#define __S100 __pgprot(0)
#define __S101 __pgprot(0)
#define __S110 __pgprot(0)
#define __S111 __pgprot(0)

extern unsigned long _page_cachable_default;

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

extern unsigned long empty_zero_page;
extern unsigned long zero_page_mask;

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

#define __pmd_page(pmd)		(pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT))
#ifndef CONFIG_TRANSPARENT_HUGEPAGE
#define pmd_page(pmd)		__pmd_page(pmd)
#endif /* CONFIG_TRANSPARENT_HUGEPAGE  */

#define pmd_page_vaddr(pmd)	pmd_val(pmd)

#define htw_stop()							\
do {									\
	if (cpu_has_htw) {						\
		write_c0_pwctl(read_c0_pwctl() &			\
			       ~(1 << MIPS_PWCTL_PWEN_SHIFT));		\
		back_to_back_c0_hazard();				\
	}								\
} while(0)

#define htw_start()							\
do {									\
	if (cpu_has_htw) {						\
		write_c0_pwctl(read_c0_pwctl() |			\
			       (1 << MIPS_PWCTL_PWEN_SHIFT));		\
		back_to_back_c0_hazard();				\
	}								\
} while(0)


#define htw_reset()							\
do {									\
	if (cpu_has_htw) {						\
		htw_stop();						\
		htw_start();						\
	}								\
} while(0)

extern void set_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep,
	pte_t pteval);

#if defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32)

#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;

	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;
		}
	}
}

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);
	htw_reset();
}
#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
}

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));
	htw_reset();
}
#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)

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

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

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

/*
 * The following only work if pte_present() is true.
 * Undefined behaviour if not..
 */
#if defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32)
static inline int pte_write(pte_t pte)	{ return pte.pte_low & _PAGE_WRITE; }
static inline int pte_dirty(pte_t pte)	{ return pte.pte_low & _PAGE_MODIFIED; }
static inline int pte_young(pte_t pte)	{ return pte.pte_low & _PAGE_ACCESSED; }
static inline int pte_file(pte_t pte)	{ return pte.pte_low & _PAGE_FILE; }

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

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

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

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

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

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

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

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

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

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

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

static inline pte_t pte_mkyoung(pte_t pte)
{
	pte_val(pte) |= _PAGE_ACCESSED;
	if (cpu_has_rixi) {
		if (!(pte_val(pte) & _PAGE_NO_READ))
			pte_val(pte) |= _PAGE_SILENT_READ;
	} else {
		if (pte_val(pte) & _PAGE_READ)
			pte_val(pte) |= _PAGE_SILENT_READ;
	}
	return pte;
}

#ifdef _PAGE_HUGE
static inline int pte_huge(pte_t pte)	{ return pte_val(pte) & _PAGE_HUGE; }

static inline pte_t pte_mkhuge(pte_t pte)
{
	pte_val(pte) |= _PAGE_HUGE;
	return pte;
}
#endif /* _PAGE_HUGE */
#endif
static inline int pte_special(pte_t pte)	{ return 0; }
static inline pte_t pte_mkspecial(pte_t pte)	{ return pte; }

/*
 * 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);
}

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

	/* cpu_data[0].writecombine is already shifted by _CACHE_SHIFT */
	prot = (prot & ~_CACHE_MASK) | cpu_data[0].writecombine;

	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_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32)
static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
{
	pte.pte_low  &= _PAGE_CHG_MASK;
	pte.pte_high &= (_PFN_MASK | _CACHE_MASK);
	pte.pte_low  |= pgprot_val(newprot);
	pte.pte_high |= pgprot_val(newprot) & ~(_PFN_MASK | _CACHE_MASK);
	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);

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

static inline void update_mmu_cache_pmd(struct vm_area_struct *vma,
	unsigned long address, pmd_t *pmdp)
{
	pte_t pte = *(pte_t *)pmdp;

	__update_tlb(vma, address, pte);
}

#define kern_addr_valid(addr)	(1)

#ifdef CONFIG_PHYS_ADDR_T_64BIT
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_addr_t phys_addr_high = fixup_bigphys_addr(pfn << PAGE_SHIFT, size);
	return remap_pfn_range(vma, vaddr, phys_addr_high >> PAGE_SHIFT, size, prot);
}
#define io_remap_pfn_range io_remap_pfn_range
#endif

#ifdef CONFIG_TRANSPARENT_HUGEPAGE

extern int has_transparent_hugepage(void);

static inline int pmd_trans_huge(pmd_t pmd)
{
	return !!(pmd_val(pmd) & _PAGE_HUGE);
}

static inline pmd_t pmd_mkhuge(pmd_t pmd)
{
	pmd_val(pmd) |= _PAGE_HUGE;

	return pmd;
}

static inline int pmd_trans_splitting(pmd_t pmd)
{
	return !!(pmd_val(pmd) & _PAGE_SPLITTING);
}

static inline pmd_t pmd_mksplitting(pmd_t pmd)
{
	pmd_val(pmd) |= _PAGE_SPLITTING;

	return pmd;
}

extern void set_pmd_at(struct mm_struct *mm, unsigned long addr,
		       pmd_t *pmdp, pmd_t pmd);

#define __HAVE_ARCH_PMDP_SPLITTING_FLUSH
/* Extern to avoid header file madness */
extern void pmdp_splitting_flush(struct vm_area_struct *vma,
					unsigned long address,
					pmd_t *pmdp);

#define __HAVE_ARCH_PMD_WRITE
static inline int pmd_write(pmd_t pmd)
{
	return !!(pmd_val(pmd) & _PAGE_WRITE);
}

static inline pmd_t pmd_wrprotect(pmd_t pmd)
{
	pmd_val(pmd) &= ~(_PAGE_WRITE | _PAGE_SILENT_WRITE);
	return pmd;
}

static inline pmd_t pmd_mkwrite(pmd_t pmd)
{
	pmd_val(pmd) |= _PAGE_WRITE;
	if (pmd_val(pmd) & _PAGE_MODIFIED)
		pmd_val(pmd) |= _PAGE_SILENT_WRITE;

	return pmd;
}

static inline int pmd_dirty(pmd_t pmd)
{
	return !!(pmd_val(pmd) & _PAGE_MODIFIED);
}

static inline pmd_t pmd_mkclean(pmd_t pmd)
{
	pmd_val(pmd) &= ~(_PAGE_MODIFIED | _PAGE_SILENT_WRITE);
	return pmd;
}

static inline pmd_t pmd_mkdirty(pmd_t pmd)
{
	pmd_val(pmd) |= _PAGE_MODIFIED;
	if (pmd_val(pmd) & _PAGE_WRITE)
		pmd_val(pmd) |= _PAGE_SILENT_WRITE;

	return pmd;
}

static inline int pmd_young(pmd_t pmd)
{
	return !!(pmd_val(pmd) & _PAGE_ACCESSED);
}

static inline pmd_t pmd_mkold(pmd_t pmd)
{
	pmd_val(pmd) &= ~(_PAGE_ACCESSED|_PAGE_SILENT_READ);

	return pmd;
}

static inline pmd_t pmd_mkyoung(pmd_t pmd)
{
	pmd_val(pmd) |= _PAGE_ACCESSED;

	if (cpu_has_rixi) {
		if (!(pmd_val(pmd) & _PAGE_NO_READ))
			pmd_val(pmd) |= _PAGE_SILENT_READ;
	} else {
		if (pmd_val(pmd) & _PAGE_READ)
			pmd_val(pmd) |= _PAGE_SILENT_READ;
	}

	return pmd;
}

/* Extern to avoid header file madness */
extern pmd_t mk_pmd(struct page *page, pgprot_t prot);

static inline unsigned long pmd_pfn(pmd_t pmd)
{
	return pmd_val(pmd) >> _PFN_SHIFT;
}

static inline struct page *pmd_page(pmd_t pmd)
{
	if (pmd_trans_huge(pmd))
		return pfn_to_page(pmd_pfn(pmd));

	return pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT);
}

static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
{
	pmd_val(pmd) = (pmd_val(pmd) & _PAGE_CHG_MASK) | pgprot_val(newprot);
	return pmd;
}

static inline pmd_t pmd_mknotpresent(pmd_t pmd)
{
	pmd_val(pmd) &= ~(_PAGE_PRESENT | _PAGE_VALID | _PAGE_DIRTY);

	return pmd;
}

/*
 * The generic version pmdp_get_and_clear uses a version of pmd_clear() with a
 * different prototype.
 */
#define __HAVE_ARCH_PMDP_GET_AND_CLEAR
static inline pmd_t pmdp_get_and_clear(struct mm_struct *mm,
				       unsigned long address, pmd_t *pmdp)
{
	pmd_t old = *pmdp;

	pmd_clear(pmdp);

	return old;
}

#endif /* CONFIG_TRANSPARENT_HUGEPAGE */

#include <asm-generic/pgtable.h>

/*
 * uncached accelerated TLB map for video memory access
 */
#ifdef CONFIG_CPU_SUPPORTS_UNCACHED_ACCELERATED
#define __HAVE_PHYS_MEM_ACCESS_PROT

struct file;
pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
		unsigned long size, pgprot_t vma_prot);
int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn,
		unsigned long size, pgprot_t *vma_prot);
#endif

/*
 * 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
#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN

/*
 * 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
5bbea36a	11	#include <linux/mm_types.h>
970d032f	12	#include <linux/mmzone.h>
875d43e7	13	#ifdef CONFIG_32BIT
1da177e4 LT	14	#include <asm/pgtable-32.h>
1da177e4 LT	15	#endif
875d43e7	16	#ifdef CONFIG_64BIT
1da177e4 LT	17	#include <asm/pgtable-64.h>
	18	#endif
	19
f10fae02	20	#include <asm/io.h>
1da177e4 LT	21	#include <asm/pgtable-bits.h>
1da177e4 LT	22
8c65b4a6 TS	23	struct mm_struct;
	24	struct vm_area_struct;
	25
1da177e4	26	#define PAGE_NONE __pgprot(_PAGE_PRESENT \| _CACHE_CACHABLE_NONCOHERENT)
05857c64	27	#define PAGE_SHARED __pgprot(_PAGE_PRESENT \| _PAGE_WRITE \| (cpu_has_rixi ? 0 : _PAGE_READ) \| \
35133692	28	_page_cachable_default)
05857c64 SH	29	#define PAGE_COPY __pgprot(_PAGE_PRESENT \| (cpu_has_rixi ? 0 : _PAGE_READ) \| \
	30	(cpu_has_rixi ? _PAGE_NO_EXEC : 0) \| _page_cachable_default)
	31	#define PAGE_READONLY __pgprot(_PAGE_PRESENT \| (cpu_has_rixi ? 0 : _PAGE_READ) \| \
35133692	32	_page_cachable_default)
1da177e4	33	#define PAGE_KERNEL __pgprot(_PAGE_PRESENT \| __READABLE \| __WRITEABLE \| \
35133692	34	_PAGE_GLOBAL \| _page_cachable_default)
e2a9e5ad PB	35	#define PAGE_KERNEL_NC __pgprot(_PAGE_PRESENT \| __READABLE \| __WRITEABLE \| \
e2a9e5ad PB	36	_PAGE_GLOBAL \| _CACHE_CACHABLE_NONCOHERENT)
05857c64	37	#define PAGE_USERIO __pgprot(_PAGE_PRESENT \| (cpu_has_rixi ? 0 : _PAGE_READ) \| _PAGE_WRITE \| \
35133692	38	_page_cachable_default)
1da177e4 LT	39	#define PAGE_KERNEL_UNCACHED __pgprot(_PAGE_PRESENT \| __READABLE \| \
	40	__WRITEABLE \| _PAGE_GLOBAL \| _CACHE_UNCACHED)
	41
	42	/*
6dd9344c DD	43	* If _PAGE_NO_EXEC is not defined, we can't do page protection for
	44	* execute, and consider it to be the same as read. Also, write
	45	* permissions imply read permissions. This is the closest we can get
	46	* by reasonable means..
1da177e4	47	*/
1da177e4	48
35133692 CD	49	/*
	50	* Dummy values to fill the table in mmap.c
	51	* The real values will be generated at runtime
	52	*/
	53	#define __P000 __pgprot(0)
	54	#define __P001 __pgprot(0)
	55	#define __P010 __pgprot(0)
	56	#define __P011 __pgprot(0)
	57	#define __P100 __pgprot(0)
	58	#define __P101 __pgprot(0)
	59	#define __P110 __pgprot(0)
	60	#define __P111 __pgprot(0)
	61
	62	#define __S000 __pgprot(0)
	63	#define __S001 __pgprot(0)
	64	#define __S010 __pgprot(0)
	65	#define __S011 __pgprot(0)
	66	#define __S100 __pgprot(0)
	67	#define __S101 __pgprot(0)
	68	#define __S110 __pgprot(0)
	69	#define __S111 __pgprot(0)
	70
	71	extern unsigned long _page_cachable_default;
1da177e4 LT	72
	73	/*
	74	* ZERO_PAGE is a global shared page that is always zero; used
	75	* for zero-mapped memory areas etc..
	76	*/
	77
	78	extern unsigned long empty_zero_page;
	79	extern unsigned long zero_page_mask;
	80
	81	#define ZERO_PAGE(vaddr) \
99e3b942	82	(virt_to_page((void *)(empty_zero_page + (((unsigned long)(vaddr)) & zero_page_mask))))
816422ad	83	#define __HAVE_COLOR_ZERO_PAGE
62eede62	84
1da177e4 LT	85	extern void paging_init(void);
	86
	87	/*
	88	* Conversion functions: convert a page and protection to a page entry,
	89	* and a page entry and page directory to the page they refer to.
	90	*/
c9d06962	91	#define pmd_phys(pmd) virt_to_phys((void *)pmd_val(pmd))
970d032f RB	92
	93	#define __pmd_page(pmd) (pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT))
	94	#ifndef CONFIG_TRANSPARENT_HUGEPAGE
	95	#define pmd_page(pmd) __pmd_page(pmd)
	96	#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
	97
46a82b2d	98	#define pmd_page_vaddr(pmd) pmd_val(pmd)
1da177e4	99
f1014d1b MC	100	#define htw_stop() \
f1014d1b MC	101	do { \
461d1597	102	if (cpu_has_htw) { \
f1014d1b MC	103	write_c0_pwctl(read_c0_pwctl() & \
f1014d1b MC	104	~(1 << MIPS_PWCTL_PWEN_SHIFT)); \
461d1597 MC	105	back_to_back_c0_hazard(); \
461d1597 MC	106	} \
f1014d1b MC	107	} while(0)
	108
	109	#define htw_start() \
	110	do { \
461d1597	111	if (cpu_has_htw) { \
f1014d1b MC	112	write_c0_pwctl(read_c0_pwctl() \| \
f1014d1b MC	113	(1 << MIPS_PWCTL_PWEN_SHIFT)); \
461d1597 MC	114	back_to_back_c0_hazard(); \
461d1597 MC	115	} \
f1014d1b MC	116	} while(0)
	117
	118
	119	#define htw_reset() \
	120	do { \
	121	if (cpu_has_htw) { \
	122	htw_stop(); \
f1014d1b	123	htw_start(); \
f1014d1b MC	124	} \
	125	} while(0)
	126
2a4a8b1e LP	127	extern void set_pte_at(struct mm_struct mm, unsigned long addr, pte_t ptep,
	128	pte_t pteval);
	129
34adb28d	130	#if defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32)
6e953891 SS	131
	132	#define pte_none(pte) (!(((pte).pte_low \| (pte).pte_high) & ~_PAGE_GLOBAL))
	133	#define pte_present(pte) ((pte).pte_low & _PAGE_PRESENT)
	134
1da177e4 LT	135	static inline void set_pte(pte_t *ptep, pte_t pte)
	136	{
	137	ptep->pte_high = pte.pte_high;
	138	smp_wmb();
	139	ptep->pte_low = pte.pte_low;
1da177e4	140
6e953891	141	if (pte.pte_low & _PAGE_GLOBAL) {
1da177e4 LT	142	pte_t *buddy = ptep_buddy(ptep);
	143	/*
	144	* Make sure the buddy is global too (if it's !none,
	145	* it better already be global)
	146	*/
6e953891	147	if (pte_none(*buddy)) {
70342287	148	buddy->pte_low \|= _PAGE_GLOBAL;
6e953891 SS	149	buddy->pte_high \|= _PAGE_GLOBAL;
6e953891 SS	150	}
1da177e4 LT	151	}
1da177e4 LT	152	}
1da177e4 LT	153
	154	static inline void pte_clear(struct mm_struct mm, unsigned long addr, pte_t ptep)
	155	{
6e953891 SS	156	pte_t null = __pte(0);
6e953891 SS	157
1da177e4	158	/* Preserve global status for the pair */
6e953891 SS	159	if (ptep_buddy(ptep)->pte_low & _PAGE_GLOBAL)
	160	null.pte_low = null.pte_high = _PAGE_GLOBAL;
	161
	162	set_pte_at(mm, addr, ptep, null);
f1014d1b	163	htw_reset();
1da177e4 LT	164	}
1da177e4 LT	165	#else
6e953891 SS	166
	167	#define pte_none(pte) (!(pte_val(pte) & ~_PAGE_GLOBAL))
	168	#define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT)
	169
1da177e4 LT	170	/*
	171	* Certain architectures need to do special things when pte's
	172	* within a page table are directly modified. Thus, the following
	173	* hook is made available.
	174	*/
	175	static inline void set_pte(pte_t *ptep, pte_t pteval)
	176	{
	177	*ptep = pteval;
	178	#if !defined(CONFIG_CPU_R3000) && !defined(CONFIG_CPU_TX39XX)
	179	if (pte_val(pteval) & _PAGE_GLOBAL) {
	180	pte_t *buddy = ptep_buddy(ptep);
	181	/*
	182	* Make sure the buddy is global too (if it's !none,
	183	* it better already be global)
	184	*/
	185	if (pte_none(*buddy))
	186	pte_val(buddy) = pte_val(buddy) \| _PAGE_GLOBAL;
	187	}
	188	#endif
	189	}
1da177e4 LT	190
	191	static inline void pte_clear(struct mm_struct mm, unsigned long addr, pte_t ptep)
	192	{
	193	#if !defined(CONFIG_CPU_R3000) && !defined(CONFIG_CPU_TX39XX)
	194	/* Preserve global status for the pair */
	195	if (pte_val(*ptep_buddy(ptep)) & _PAGE_GLOBAL)
	196	set_pte_at(mm, addr, ptep, __pte(_PAGE_GLOBAL));
	197	else
	198	#endif
	199	set_pte_at(mm, addr, ptep, __pte(0));
f1014d1b	200	htw_reset();
1da177e4 LT	201	}
	202	#endif
	203
	204	/*
c6e8b587	205	* (pmds are folded into puds so this doesn't get actually called,
1da177e4 LT	206	* but the define is needed for a generic inline function.)
	207	*/
	208	#define set_pmd(pmdptr, pmdval) do { *(pmdptr) = (pmdval); } while(0)
c6e8b587	209
325f8a0a	210	#ifndef __PAGETABLE_PMD_FOLDED
c6e8b587 RB	211	/*
	212	* (puds are folded into pgds so this doesn't get actually called,
	213	* but the define is needed for a generic inline function.)
	214	*/
	215	#define set_pud(pudptr, pudval) do { *(pudptr) = (pudval); } while(0)
	216	#endif
1da177e4	217
5ff97472 RB	218	#define PGD_T_LOG2 (__builtin_ffs(sizeof(pgd_t)) - 1)
	219	#define PMD_T_LOG2 (__builtin_ffs(sizeof(pmd_t)) - 1)
	220	#define PTE_T_LOG2 (__builtin_ffs(sizeof(pte_t)) - 1)
1da177e4	221
9975e77d RB	222	/*
	223	* We used to declare this array with size but gcc 3.3 and older are not able
	224	* to find that this expression is a constant, so the size is dropped.
	225	*/
	226	extern pgd_t swapper_pg_dir[];
1da177e4 LT	227
	228	/*
	229	* The following only work if pte_present() is true.
	230	* Undefined behaviour if not..
	231	*/
34adb28d	232	#if defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32)
6e953891 SS	233	static inline int pte_write(pte_t pte) { return pte.pte_low & _PAGE_WRITE; }
	234	static inline int pte_dirty(pte_t pte) { return pte.pte_low & _PAGE_MODIFIED; }
	235	static inline int pte_young(pte_t pte) { return pte.pte_low & _PAGE_ACCESSED; }
	236	static inline int pte_file(pte_t pte) { return pte.pte_low & _PAGE_FILE; }
	237
1da177e4 LT	238	static inline pte_t pte_wrprotect(pte_t pte)
1da177e4 LT	239	{
6e953891 SS	240	pte.pte_low &= ~(_PAGE_WRITE \| _PAGE_SILENT_WRITE);
6e953891 SS	241	pte.pte_high &= ~_PAGE_SILENT_WRITE;
1da177e4 LT	242	return pte;
	243	}
	244
1da177e4 LT	245	static inline pte_t pte_mkclean(pte_t pte)
1da177e4 LT	246	{
6e953891 SS	247	pte.pte_low &= ~(_PAGE_MODIFIED \| _PAGE_SILENT_WRITE);
6e953891 SS	248	pte.pte_high &= ~_PAGE_SILENT_WRITE;
1da177e4 LT	249	return pte;
	250	}
	251
	252	static inline pte_t pte_mkold(pte_t pte)
	253	{
6e953891 SS	254	pte.pte_low &= ~(_PAGE_ACCESSED \| _PAGE_SILENT_READ);
6e953891 SS	255	pte.pte_high &= ~_PAGE_SILENT_READ;
1da177e4 LT	256	return pte;
	257	}
	258
	259	static inline pte_t pte_mkwrite(pte_t pte)
	260	{
6e953891 SS	261	pte.pte_low \|= _PAGE_WRITE;
	262	if (pte.pte_low & _PAGE_MODIFIED) {
	263	pte.pte_low \|= _PAGE_SILENT_WRITE;
	264	pte.pte_high \|= _PAGE_SILENT_WRITE;
1da177e4 LT	265	}
	266	return pte;
	267	}
	268
1da177e4 LT	269	static inline pte_t pte_mkdirty(pte_t pte)
1da177e4 LT	270	{
6e953891 SS	271	pte.pte_low \|= _PAGE_MODIFIED;
	272	if (pte.pte_low & _PAGE_WRITE) {
	273	pte.pte_low \|= _PAGE_SILENT_WRITE;
	274	pte.pte_high \|= _PAGE_SILENT_WRITE;
1da177e4 LT	275	}
	276	return pte;
	277	}
	278
	279	static inline pte_t pte_mkyoung(pte_t pte)
	280	{
6e953891	281	pte.pte_low \|= _PAGE_ACCESSED;
057229f9	282	if (pte.pte_low & _PAGE_READ) {
6e953891 SS	283	pte.pte_low \|= _PAGE_SILENT_READ;
6e953891 SS	284	pte.pte_high \|= _PAGE_SILENT_READ;
057229f9	285	}
1da177e4 LT	286	return pte;
	287	}
	288	#else
1da177e4 LT	289	static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_WRITE; }
	290	static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_MODIFIED; }
	291	static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; }
	292	static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE; }
	293
	294	static inline pte_t pte_wrprotect(pte_t pte)
	295	{
	296	pte_val(pte) &= ~(_PAGE_WRITE \| _PAGE_SILENT_WRITE);
	297	return pte;
	298	}
	299
1da177e4 LT	300	static inline pte_t pte_mkclean(pte_t pte)
1da177e4 LT	301	{
77a5c593	302	pte_val(pte) &= ~(_PAGE_MODIFIED \| _PAGE_SILENT_WRITE);
1da177e4 LT	303	return pte;
	304	}
	305
	306	static inline pte_t pte_mkold(pte_t pte)
	307	{
77a5c593	308	pte_val(pte) &= ~(_PAGE_ACCESSED \| _PAGE_SILENT_READ);
1da177e4 LT	309	return pte;
	310	}
	311
	312	static inline pte_t pte_mkwrite(pte_t pte)
	313	{
	314	pte_val(pte) \|= _PAGE_WRITE;
	315	if (pte_val(pte) & _PAGE_MODIFIED)
	316	pte_val(pte) \|= _PAGE_SILENT_WRITE;
	317	return pte;
	318	}
	319
1da177e4 LT	320	static inline pte_t pte_mkdirty(pte_t pte)
	321	{
	322	pte_val(pte) \|= _PAGE_MODIFIED;
	323	if (pte_val(pte) & _PAGE_WRITE)
	324	pte_val(pte) \|= _PAGE_SILENT_WRITE;
	325	return pte;
	326	}
	327
	328	static inline pte_t pte_mkyoung(pte_t pte)
	329	{
	330	pte_val(pte) \|= _PAGE_ACCESSED;
05857c64	331	if (cpu_has_rixi) {
6dd9344c DD	332	if (!(pte_val(pte) & _PAGE_NO_READ))
	333	pte_val(pte) \|= _PAGE_SILENT_READ;
	334	} else {
	335	if (pte_val(pte) & _PAGE_READ)
	336	pte_val(pte) \|= _PAGE_SILENT_READ;
	337	}
1da177e4 LT	338	return pte;
1da177e4 LT	339	}
dd794392 DD	340
	341	#ifdef _PAGE_HUGE
	342	static inline int pte_huge(pte_t pte) { return pte_val(pte) & _PAGE_HUGE; }
	343
	344	static inline pte_t pte_mkhuge(pte_t pte)
	345	{
	346	pte_val(pte) \|= _PAGE_HUGE;
	347	return pte;
	348	}
	349	#endif /* _PAGE_HUGE */
1da177e4	350	#endif
7e675137 NP	351	static inline int pte_special(pte_t pte) { return 0; }
7e675137 NP	352	static inline pte_t pte_mkspecial(pte_t pte) { return pte; }
1da177e4 LT	353
1da177e4 LT	354	/*
70342287	355	* Macro to make mark a page protection value as "uncacheable". Note
1da177e4 LT	356	* that "protection" is really a misnomer here as the protection value
	357	* contains the memory attribute bits, dirty bits, and various other
	358	* bits as well.
	359	*/
	360	#define pgprot_noncached pgprot_noncached
	361
	362	static inline pgprot_t pgprot_noncached(pgprot_t _prot)
	363	{
	364	unsigned long prot = pgprot_val(_prot);
	365
	366	prot = (prot & ~_CACHE_MASK) \| _CACHE_UNCACHED;
	367
	368	return __pgprot(prot);
	369	}
	370
4b050ba7 MC	371	static inline pgprot_t pgprot_writecombine(pgprot_t _prot)
	372	{
	373	unsigned long prot = pgprot_val(_prot);
	374
	375	/* cpu_data[0].writecombine is already shifted by _CACHE_SHIFT */
	376	prot = (prot & ~_CACHE_MASK) \| cpu_data[0].writecombine;
	377
	378	return __pgprot(prot);
	379	}
	380
1da177e4 LT	381	/*
	382	* Conversion functions: convert a page and protection to a page entry,
	383	* and a page entry and page directory to the page they refer to.
	384	*/
	385	#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
	386
34adb28d	387	#if defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32)
1da177e4 LT	388	static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
1da177e4 LT	389	{
79e0bc37	390	pte.pte_low &= _PAGE_CHG_MASK;
77a5c593	391	pte.pte_high &= (_PFN_MASK \| _CACHE_MASK);
79e0bc37	392	pte.pte_low \|= pgprot_val(newprot);
77a5c593	393	pte.pte_high \|= pgprot_val(newprot) & ~(_PFN_MASK \| _CACHE_MASK);
1da177e4 LT	394	return pte;
	395	}
	396	#else
	397	static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
	398	{
	399	return __pte((pte_val(pte) & _PAGE_CHG_MASK) \| pgprot_val(newprot));
	400	}
	401	#endif
	402
	403
	404	extern void __update_tlb(struct vm_area_struct *vma, unsigned long address,
	405	pte_t pte);
1da177e4 LT	406
1da177e4 LT	407	static inline void update_mmu_cache(struct vm_area_struct *vma,
4b3073e1	408	unsigned long address, pte_t *ptep)
1da177e4	409	{
4b3073e1	410	pte_t pte = *ptep;
1da177e4	411	__update_tlb(vma, address, pte);
1da177e4 LT	412	}
1da177e4 LT	413
970d032f RB	414	static inline void update_mmu_cache_pmd(struct vm_area_struct *vma,
	415	unsigned long address, pmd_t *pmdp)
	416	{
	417	pte_t pte = (pte_t )pmdp;
	418
	419	__update_tlb(vma, address, pte);
	420	}
	421
1da177e4	422	#define kern_addr_valid(addr) (1)
1da177e4	423
34adb28d	424	#ifdef CONFIG_PHYS_ADDR_T_64BIT
1da177e4 LT	425	extern int remap_pfn_range(struct vm_area_struct *vma, unsigned long from, unsigned long pfn, unsigned long size, pgprot_t prot);
1da177e4 LT	426
1da177e4 LT	427	static inline int io_remap_pfn_range(struct vm_area_struct *vma,
	428	unsigned long vaddr,
	429	unsigned long pfn,
	430	unsigned long size,
	431	pgprot_t prot)
	432	{
15d45cce	433	phys_addr_t phys_addr_high = fixup_bigphys_addr(pfn << PAGE_SHIFT, size);
ac5d8c02	434	return remap_pfn_range(vma, vaddr, phys_addr_high >> PAGE_SHIFT, size, prot);
1da177e4	435	}
40d158e6	436	#define io_remap_pfn_range io_remap_pfn_range
1da177e4 LT	437	#endif
1da177e4 LT	438
970d032f RB	439	#ifdef CONFIG_TRANSPARENT_HUGEPAGE
	440
	441	extern int has_transparent_hugepage(void);
	442
	443	static inline int pmd_trans_huge(pmd_t pmd)
	444	{
	445	return !!(pmd_val(pmd) & _PAGE_HUGE);
	446	}
	447
	448	static inline pmd_t pmd_mkhuge(pmd_t pmd)
	449	{
	450	pmd_val(pmd) \|= _PAGE_HUGE;
	451
	452	return pmd;
	453	}
	454
	455	static inline int pmd_trans_splitting(pmd_t pmd)
	456	{
	457	return !!(pmd_val(pmd) & _PAGE_SPLITTING);
	458	}
	459
	460	static inline pmd_t pmd_mksplitting(pmd_t pmd)
	461	{
	462	pmd_val(pmd) \|= _PAGE_SPLITTING;
	463
	464	return pmd;
	465	}
	466
	467	extern void set_pmd_at(struct mm_struct *mm, unsigned long addr,
	468	pmd_t *pmdp, pmd_t pmd);
	469
	470	#define __HAVE_ARCH_PMDP_SPLITTING_FLUSH
	471	/* Extern to avoid header file madness */
	472	extern void pmdp_splitting_flush(struct vm_area_struct *vma,
	473	unsigned long address,
	474	pmd_t *pmdp);
	475
	476	#define __HAVE_ARCH_PMD_WRITE
	477	static inline int pmd_write(pmd_t pmd)
	478	{
	479	return !!(pmd_val(pmd) & _PAGE_WRITE);
	480	}
	481
	482	static inline pmd_t pmd_wrprotect(pmd_t pmd)
	483	{
	484	pmd_val(pmd) &= ~(_PAGE_WRITE \| _PAGE_SILENT_WRITE);
	485	return pmd;
	486	}
	487
	488	static inline pmd_t pmd_mkwrite(pmd_t pmd)
	489	{
	490	pmd_val(pmd) \|= _PAGE_WRITE;
	491	if (pmd_val(pmd) & _PAGE_MODIFIED)
	492	pmd_val(pmd) \|= _PAGE_SILENT_WRITE;
	493
	494	return pmd;
	495	}
	496
	497	static inline int pmd_dirty(pmd_t pmd)
	498	{
	499	return !!(pmd_val(pmd) & _PAGE_MODIFIED);
	500	}
	501
	502	static inline pmd_t pmd_mkclean(pmd_t pmd)
503	{
504	pmd_val(pmd) &= ~(_PAGE_MODIFIED \| _PAGE_SILENT_WRITE);
505	return pmd;
506	}
507
508	static inline pmd_t pmd_mkdirty(pmd_t pmd)
509	{
510	pmd_val(pmd) \|= _PAGE_MODIFIED;
511	if (pmd_val(pmd) & _PAGE_WRITE)
512	pmd_val(pmd) \|= _PAGE_SILENT_WRITE;
513
514	return pmd;
515	}
516
517	static inline int pmd_young(pmd_t pmd)
518	{
519	return !!(pmd_val(pmd) & _PAGE_ACCESSED);
520	}
521
522	static inline pmd_t pmd_mkold(pmd_t pmd)
523	{
524	pmd_val(pmd) &= ~(_PAGE_ACCESSED\|_PAGE_SILENT_READ);
525
526	return pmd;
527	}
528
529	static inline pmd_t pmd_mkyoung(pmd_t pmd)
530	{
531	pmd_val(pmd) \|= _PAGE_ACCESSED;
532
533	if (cpu_has_rixi) {
534	if (!(pmd_val(pmd) & _PAGE_NO_READ))
535	pmd_val(pmd) \|= _PAGE_SILENT_READ;
536	} else {
537	if (pmd_val(pmd) & _PAGE_READ)
538	pmd_val(pmd) \|= _PAGE_SILENT_READ;
539	}
540
541	return pmd;
542	}
543
544	/* Extern to avoid header file madness */
545	extern pmd_t mk_pmd(struct page *page, pgprot_t prot);
546
547	static inline unsigned long pmd_pfn(pmd_t pmd)
548	{
549	return pmd_val(pmd) >> _PFN_SHIFT;
550	}
551
552	static inline struct page *pmd_page(pmd_t pmd)
553	{
554	if (pmd_trans_huge(pmd))
555	return pfn_to_page(pmd_pfn(pmd));
556
557	return pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT);
558	}
559
560	static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
561	{
562	pmd_val(pmd) = (pmd_val(pmd) & _PAGE_CHG_MASK) \| pgprot_val(newprot);
563	return pmd;
564	}
565
566	static inline pmd_t pmd_mknotpresent(pmd_t pmd)
567	{
568	pmd_val(pmd) &= ~(_PAGE_PRESENT \| _PAGE_VALID \| _PAGE_DIRTY);
569
570	return pmd;
571	}
572
573	/*
574	* The generic version pmdp_get_and_clear uses a version of pmd_clear() with a
575	* different prototype.
576	*/
577	#define __HAVE_ARCH_PMDP_GET_AND_CLEAR
578	static inline pmd_t pmdp_get_and_clear(struct mm_struct *mm,
579	unsigned long address, pmd_t *pmdp)
580	{
581	pmd_t old = *pmdp;
582
583	pmd_clear(pmdp);
584
585	return old;
586	}
587
588	#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
589
1da177e4 LT	590	#include <asm-generic/pgtable.h>
1da177e4 LT	591
22f1fdfd WZ	592	/*
	593	* uncached accelerated TLB map for video memory access
	594	*/
	595	#ifdef CONFIG_CPU_SUPPORTS_UNCACHED_ACCELERATED
	596	#define __HAVE_PHYS_MEM_ACCESS_PROT
	597
	598	struct file;
	599	pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
	600	unsigned long size, pgprot_t vma_prot);
	601	int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn,
	602	unsigned long size, pgprot_t *vma_prot);
	603	#endif
	604
1da177e4 LT	605	/*
	606	* We provide our own get_unmapped area to cope with the virtual aliasing
	607	* constraints placed on us by the cache architecture.
	608	*/
	609	#define HAVE_ARCH_UNMAPPED_AREA
d0be89f6	610	#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
1da177e4 LT	611
	612	/*
	613	* No page table caches to initialise
	614	*/
	615	#define pgtable_cache_init() do { } while (0)
	616
	617	#endif /* _ASM_PGTABLE_H */