[linux.git] / include / asm-sh / pgtable.h

#ifndef __ASM_SH_PGTABLE_H
#define __ASM_SH_PGTABLE_H

#include <asm-generic/4level-fixup.h>

/*
 * Copyright (C) 1999 Niibe Yutaka
 * Copyright (C) 2002, 2003, 2004 Paul Mundt
 */

#include <linux/config.h>
#include <asm/pgtable-2level.h>

/*
 * This file contains the functions and defines necessary to modify and use
 * the SuperH page table tree.
 */
#ifndef __ASSEMBLY__
#include <asm/processor.h>
#include <asm/addrspace.h>
#include <asm/fixmap.h>
#include <linux/threads.h>

extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
extern void paging_init(void);

/*
 * Basically we have the same two-level (which is the logical three level
 * Linux page table layout folded) page tables as the i386.
 */

/*
 * ZERO_PAGE is a global shared page that is always zero: used
 * for zero-mapped memory areas etc..
 */
extern unsigned long empty_zero_page[1024];
#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))

#endif /* !__ASSEMBLY__ */

#define PMD_SIZE	(1UL << PMD_SHIFT)
#define PMD_MASK	(~(PMD_SIZE-1))
#define PGDIR_SIZE	(1UL << PGDIR_SHIFT)
#define PGDIR_MASK	(~(PGDIR_SIZE-1))

#define USER_PTRS_PER_PGD	(TASK_SIZE/PGDIR_SIZE)
#define FIRST_USER_ADDRESS	0

#define PTE_PHYS_MASK	0x1ffff000

#ifndef __ASSEMBLY__
/*
 * First 1MB map is used by fixed purpose.
 * Currently only 4-enty (16kB) is used (see arch/sh/mm/cache.c)
 */
#define VMALLOC_START	(P3SEG+0x00100000)
#define VMALLOC_END	(FIXADDR_START-2*PAGE_SIZE)

#define	_PAGE_WT	0x001  /* WT-bit on SH-4, 0 on SH-3 */
#define _PAGE_HW_SHARED	0x002  /* SH-bit  : page is shared among processes */
#define _PAGE_DIRTY	0x004  /* D-bit   : page changed */
#define _PAGE_CACHABLE	0x008  /* C-bit   : cachable */
#define _PAGE_SZ0	0x010  /* SZ0-bit : Size of page */
#define _PAGE_RW	0x020  /* PR0-bit : write access allowed */
#define _PAGE_USER	0x040  /* PR1-bit : user space access allowed */
#define _PAGE_SZ1	0x080  /* SZ1-bit : Size of page (on SH-4) */
#define _PAGE_PRESENT	0x100  /* V-bit   : page is valid */
#define _PAGE_PROTNONE	0x200  /* software: if not present  */
#define _PAGE_ACCESSED 	0x400  /* software: page referenced */
#define _PAGE_U0_SHARED 0x800  /* software: page is shared in user space */

#define	_PAGE_FILE	_PAGE_WT  /* software: pagecache or swap? */

/* software: moves to PTEA.TC (Timing Control) */
#define _PAGE_PCC_AREA5	0x00000000	/* use BSC registers for area5 */
#define _PAGE_PCC_AREA6	0x80000000	/* use BSC registers for area6 */

/* software: moves to PTEA.SA[2:0] (Space Attributes) */
#define _PAGE_PCC_IODYN 0x00000001	/* IO space, dynamically sized bus */
#define _PAGE_PCC_IO8	0x20000000	/* IO space, 8 bit bus */
#define _PAGE_PCC_IO16	0x20000001	/* IO space, 16 bit bus */
#define _PAGE_PCC_COM8	0x40000000	/* Common Memory space, 8 bit bus */
#define _PAGE_PCC_COM16	0x40000001	/* Common Memory space, 16 bit bus */
#define _PAGE_PCC_ATR8	0x60000000	/* Attribute Memory space, 8 bit bus */
#define _PAGE_PCC_ATR16	0x60000001	/* Attribute Memory space, 6 bit bus */


/* Mask which drop software flags
 * We also drop WT bit since it is used for _PAGE_FILE
 * bit in this implementation.
 */
#define _PAGE_CLEAR_FLAGS	(_PAGE_WT | _PAGE_PROTNONE | _PAGE_ACCESSED | _PAGE_U0_SHARED)

#if defined(CONFIG_CPU_SH3)
/*
 * MMU on SH-3 has bug on SH-bit: We can't use it if MMUCR.IX=1.
 * Work around: Just drop SH-bit.
 */
#define _PAGE_FLAGS_HARDWARE_MASK	(0x1fffffff & ~(_PAGE_CLEAR_FLAGS | _PAGE_HW_SHARED))
#else
#define _PAGE_FLAGS_HARDWARE_MASK	(0x1fffffff & ~(_PAGE_CLEAR_FLAGS))
#endif

/* Hardware flags: SZ0=1 (4k-byte) */
#define _PAGE_FLAGS_HARD	_PAGE_SZ0

#if defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
#define _PAGE_SZHUGE	(_PAGE_SZ1)
#elif defined(CONFIG_HUGETLB_PAGE_SIZE_1MB)
#define _PAGE_SZHUGE	(_PAGE_SZ0 | _PAGE_SZ1)
#endif

#define _PAGE_SHARED	_PAGE_U0_SHARED

#define _PAGE_TABLE	(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_DIRTY)
#define _KERNPG_TABLE	(_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY)
#define _PAGE_CHG_MASK	(PTE_MASK | _PAGE_ACCESSED | _PAGE_CACHABLE | _PAGE_DIRTY | _PAGE_SHARED)

#ifdef CONFIG_MMU
#define PAGE_NONE	__pgprot(_PAGE_PROTNONE | _PAGE_CACHABLE |_PAGE_ACCESSED | _PAGE_FLAGS_HARD)
#define PAGE_SHARED	__pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_CACHABLE |_PAGE_ACCESSED | _PAGE_SHARED | _PAGE_FLAGS_HARD)
#define PAGE_COPY	__pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_CACHABLE | _PAGE_ACCESSED | _PAGE_FLAGS_HARD)
#define PAGE_READONLY	__pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_CACHABLE | _PAGE_ACCESSED | _PAGE_FLAGS_HARD)
#define PAGE_KERNEL	__pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_CACHABLE | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_HW_SHARED | _PAGE_FLAGS_HARD)
#define PAGE_KERNEL_NOCACHE \
			__pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_HW_SHARED | _PAGE_FLAGS_HARD)
#define PAGE_KERNEL_RO	__pgprot(_PAGE_PRESENT | _PAGE_CACHABLE | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_HW_SHARED | _PAGE_FLAGS_HARD)
#define PAGE_KERNEL_PCC(slot, type) \
			__pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_FLAGS_HARD | (slot ? _PAGE_PCC_AREA5 : _PAGE_PCC_AREA6) | (type))
#else /* no mmu */
#define PAGE_NONE		__pgprot(0)
#define PAGE_SHARED		__pgprot(0)
#define PAGE_COPY		__pgprot(0)
#define PAGE_READONLY		__pgprot(0)
#define PAGE_KERNEL		__pgprot(0)
#define PAGE_KERNEL_NOCACHE	__pgprot(0)
#define PAGE_KERNEL_RO		__pgprot(0)
#define PAGE_KERNEL_PCC		__pgprot(0)
#endif

/*
 * As i386 and MIPS, SuperH can't do page protection for execute, and
 * considers that the same as a read.  Also, write permissions imply
 * read permissions. This is the closest we can get..  
 */

#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

#define pte_none(x)	(!pte_val(x))
#define pte_present(x)	(pte_val(x) & (_PAGE_PRESENT | _PAGE_PROTNONE))
#define pte_clear(mm,addr,xp)	do { set_pte_at(mm, addr, xp, __pte(0)); } while (0)

#define pmd_none(x)	(!pmd_val(x))
#define pmd_present(x)	(pmd_val(x) & _PAGE_PRESENT)
#define pmd_clear(xp)	do { set_pmd(xp, __pmd(0)); } while (0)
#define	pmd_bad(x)	((pmd_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE)

#define pages_to_mb(x)	((x) >> (20-PAGE_SHIFT))
#define pte_page(x) 	phys_to_page(pte_val(x)&PTE_PHYS_MASK)

/*
 * The following only work if pte_present() is true.
 * Undefined behaviour if not..
 */
static inline int pte_read(pte_t pte) { return pte_val(pte) & _PAGE_USER; }
static inline int pte_exec(pte_t pte) { return pte_val(pte) & _PAGE_USER; }
static inline int pte_dirty(pte_t pte){ return pte_val(pte) & _PAGE_DIRTY; }
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 int pte_write(pte_t pte){ return pte_val(pte) & _PAGE_RW; }
static inline int pte_not_present(pte_t pte){ return !(pte_val(pte) & _PAGE_PRESENT); }

static inline pte_t pte_rdprotect(pte_t pte)	{ set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_USER)); return pte; }
static inline pte_t pte_exprotect(pte_t pte)	{ set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_USER)); return pte; }
static inline pte_t pte_mkclean(pte_t pte)	{ set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_DIRTY)); return pte; }
static inline pte_t pte_mkold(pte_t pte)	{ set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_ACCESSED)); return pte; }
static inline pte_t pte_wrprotect(pte_t pte)	{ set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_RW)); return pte; }
static inline pte_t pte_mkread(pte_t pte)	{ set_pte(&pte, __pte(pte_val(pte) | _PAGE_USER)); return pte; }
static inline pte_t pte_mkexec(pte_t pte)	{ set_pte(&pte, __pte(pte_val(pte) | _PAGE_USER)); return pte; }
static inline pte_t pte_mkdirty(pte_t pte)	{ set_pte(&pte, __pte(pte_val(pte) | _PAGE_DIRTY)); return pte; }
static inline pte_t pte_mkyoung(pte_t pte)	{ set_pte(&pte, __pte(pte_val(pte) | _PAGE_ACCESSED)); return pte; }
static inline pte_t pte_mkwrite(pte_t pte)	{ set_pte(&pte, __pte(pte_val(pte) | _PAGE_RW)); return pte; }
#ifdef CONFIG_HUGETLB_PAGE
static inline pte_t pte_mkhuge(pte_t pte)	{ set_pte(&pte, __pte(pte_val(pte) | _PAGE_SZHUGE)); return pte; }
#endif

/*
 * Macro and implementation to make a page protection as uncachable.
 */
#define pgprot_noncached pgprot_noncached

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

	prot &= ~_PAGE_CACHABLE;
	return __pgprot(prot);
}

#define pgprot_writecombine(prot) __pgprot(pgprot_val(prot) & ~_PAGE_CACHABLE)

/*
 * Conversion functions: convert a page and protection to a page entry,
 * and a page entry and page directory to the page they refer to.
 *
 * extern pte_t mk_pte(struct page *page, pgprot_t pgprot)
 */
#define mk_pte(page, pgprot)	pfn_pte(page_to_pfn(page), (pgprot))

static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
{ set_pte(&pte, __pte((pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot))); return pte; }

#define pmd_page_kernel(pmd) \
((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))

#define pmd_page(pmd) \
	(phys_to_page(pmd_val(pmd)))

/* to find an entry in a page-table-directory. */
#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
#define pgd_offset(mm, address) ((mm)->pgd+pgd_index(address))

/* to find an entry in a kernel page-table-directory */
#define pgd_offset_k(address) pgd_offset(&init_mm, address)

/* Find an entry in the third-level page table.. */
#define pte_index(address) \
		((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
#define pte_offset_kernel(dir, address) \
	((pte_t *) pmd_page_kernel(*(dir)) + pte_index(address))
#define pte_offset_map(dir, address) pte_offset_kernel(dir, address)
#define pte_offset_map_nested(dir, address) pte_offset_kernel(dir, address)
#define pte_unmap(pte)		do { } while (0)
#define pte_unmap_nested(pte)	do { } while (0)

struct vm_area_struct;
extern void update_mmu_cache(struct vm_area_struct * vma,
			     unsigned long address, pte_t pte);

/* Encode and de-code a swap entry */
/*
 * NOTE: We should set ZEROs at the position of _PAGE_PRESENT
 *       and _PAGE_PROTNONE bits
 */
#define __swp_type(x)		((x).val & 0xff)
#define __swp_offset(x)		((x).val >> 10)
#define __swp_entry(type, offset) ((swp_entry_t) { (type) | ((offset) << 10) })
#define __pte_to_swp_entry(pte)	((swp_entry_t) { pte_val(pte) >> 1 })
#define __swp_entry_to_pte(x)	((pte_t) { (x).val << 1 })

/*
 * Encode and decode a nonlinear file mapping entry
 */
#define PTE_FILE_MAX_BITS	29
#define pte_to_pgoff(pte)	(pte_val(pte) >> 1)
#define pgoff_to_pte(off)	((pte_t) { ((off) << 1) | _PAGE_FILE })

typedef pte_t *pte_addr_t;

#endif /* !__ASSEMBLY__ */

#define kern_addr_valid(addr)	(1)

#define io_remap_pfn_range(vma, vaddr, pfn, size, prot)		\
		remap_pfn_range(vma, vaddr, pfn, size, prot)

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

struct mm_struct;

/*
 * No page table caches to initialise
 */
#define pgtable_cache_init()	do { } while (0)

#ifndef CONFIG_MMU
extern unsigned int kobjsize(const void *objp);
#endif /* !CONFIG_MMU */

#if defined(CONFIG_CPU_SH4) || defined(CONFIG_SH7705_CACHE_32KB)
#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
extern pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
#endif

#include <asm-generic/pgtable.h>

#endif /* __ASM_SH_PAGE_H */
Commit	Line	Data
1da177e4 LT	1	#ifndef __ASM_SH_PGTABLE_H
	2	#define __ASM_SH_PGTABLE_H
	3
	4	#include <asm-generic/4level-fixup.h>
	5
	6	/*
	7	* Copyright (C) 1999 Niibe Yutaka
	8	* Copyright (C) 2002, 2003, 2004 Paul Mundt
	9	*/
	10
	11	#include <linux/config.h>
	12	#include <asm/pgtable-2level.h>
	13
	14	/*
	15	* This file contains the functions and defines necessary to modify and use
	16	* the SuperH page table tree.
	17	*/
	18	#ifndef __ASSEMBLY__
	19	#include <asm/processor.h>
	20	#include <asm/addrspace.h>
	21	#include <asm/fixmap.h>
	22	#include <linux/threads.h>
	23
	24	extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
	25	extern void paging_init(void);
	26
	27	/*
	28	* Basically we have the same two-level (which is the logical three level
	29	* Linux page table layout folded) page tables as the i386.
	30	*/
	31
	32	/*
	33	* ZERO_PAGE is a global shared page that is always zero: used
	34	* for zero-mapped memory areas etc..
	35	*/
	36	extern unsigned long empty_zero_page[1024];
	37	#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
	38
	39	#endif /* !__ASSEMBLY__ */
	40
	41	#define PMD_SIZE (1UL << PMD_SHIFT)
	42	#define PMD_MASK (~(PMD_SIZE-1))
	43	#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
	44	#define PGDIR_MASK (~(PGDIR_SIZE-1))
	45
	46	#define USER_PTRS_PER_PGD (TASK_SIZE/PGDIR_SIZE)
d455a369	47	#define FIRST_USER_ADDRESS 0
1da177e4 LT	48
	49	#define PTE_PHYS_MASK 0x1ffff000
	50
	51	#ifndef __ASSEMBLY__
	52	/*
	53	* First 1MB map is used by fixed purpose.
	54	* Currently only 4-enty (16kB) is used (see arch/sh/mm/cache.c)
	55	*/
	56	#define VMALLOC_START (P3SEG+0x00100000)
	57	#define VMALLOC_END (FIXADDR_START-2*PAGE_SIZE)
	58
	59	#define _PAGE_WT 0x001 /* WT-bit on SH-4, 0 on SH-3 */
	60	#define _PAGE_HW_SHARED 0x002 /* SH-bit : page is shared among processes */
	61	#define _PAGE_DIRTY 0x004 /* D-bit : page changed */
	62	#define _PAGE_CACHABLE 0x008 /* C-bit : cachable */
	63	#define _PAGE_SZ0 0x010 /* SZ0-bit : Size of page */
	64	#define _PAGE_RW 0x020 /* PR0-bit : write access allowed */
	65	#define _PAGE_USER 0x040 /* PR1-bit : user space access allowed */
	66	#define _PAGE_SZ1 0x080 /* SZ1-bit : Size of page (on SH-4) */
	67	#define _PAGE_PRESENT 0x100 /* V-bit : page is valid */
	68	#define _PAGE_PROTNONE 0x200 /* software: if not present */
	69	#define _PAGE_ACCESSED 0x400 /* software: page referenced */
	70	#define _PAGE_U0_SHARED 0x800 /* software: page is shared in user space */
	71
	72	#define _PAGE_FILE _PAGE_WT /* software: pagecache or swap? */
	73
	74	/* software: moves to PTEA.TC (Timing Control) */
	75	#define _PAGE_PCC_AREA5 0x00000000 /* use BSC registers for area5 */
	76	#define _PAGE_PCC_AREA6 0x80000000 /* use BSC registers for area6 */
	77
	78	/* software: moves to PTEA.SA[2:0] (Space Attributes) */
	79	#define _PAGE_PCC_IODYN 0x00000001 /* IO space, dynamically sized bus */
	80	#define _PAGE_PCC_IO8 0x20000000 /* IO space, 8 bit bus */
	81	#define _PAGE_PCC_IO16 0x20000001 /* IO space, 16 bit bus */
	82	#define _PAGE_PCC_COM8 0x40000000 /* Common Memory space, 8 bit bus */
	83	#define _PAGE_PCC_COM16 0x40000001 /* Common Memory space, 16 bit bus */
	84	#define _PAGE_PCC_ATR8 0x60000000 /* Attribute Memory space, 8 bit bus */
	85	#define _PAGE_PCC_ATR16 0x60000001 /* Attribute Memory space, 6 bit bus */
	86
	87
	88	/* Mask which drop software flags
	89	* We also drop WT bit since it is used for _PAGE_FILE
	90	* bit in this implementation.
	91	*/
	92	#define _PAGE_CLEAR_FLAGS (_PAGE_WT \| _PAGE_PROTNONE \| _PAGE_ACCESSED \| _PAGE_U0_SHARED)
	93
	94	#if defined(CONFIG_CPU_SH3)
	95	/*
	96	* MMU on SH-3 has bug on SH-bit: We can't use it if MMUCR.IX=1.
	97	* Work around: Just drop SH-bit.
	98	*/
	99	#define _PAGE_FLAGS_HARDWARE_MASK (0x1fffffff & ~(_PAGE_CLEAR_FLAGS \| _PAGE_HW_SHARED))
	100	#else
	101	#define _PAGE_FLAGS_HARDWARE_MASK (0x1fffffff & ~(_PAGE_CLEAR_FLAGS))
	102	#endif
	103
	104	/* Hardware flags: SZ0=1 (4k-byte) */
	105	#define _PAGE_FLAGS_HARD _PAGE_SZ0
	106
	107	#if defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
	108	#define _PAGE_SZHUGE (_PAGE_SZ1)
	109	#elif defined(CONFIG_HUGETLB_PAGE_SIZE_1MB)
	110	#define _PAGE_SZHUGE (_PAGE_SZ0 \| _PAGE_SZ1)
	111	#endif
112
113	#define _PAGE_SHARED _PAGE_U0_SHARED
114
115	#define _PAGE_TABLE (_PAGE_PRESENT \| _PAGE_RW \| _PAGE_USER \| _PAGE_ACCESSED \| _PAGE_DIRTY)
116	#define _KERNPG_TABLE (_PAGE_PRESENT \| _PAGE_RW \| _PAGE_ACCESSED \| _PAGE_DIRTY)
117	#define _PAGE_CHG_MASK (PTE_MASK \| _PAGE_ACCESSED \| _PAGE_CACHABLE \| _PAGE_DIRTY \| _PAGE_SHARED)
118
119	#ifdef CONFIG_MMU
120	#define PAGE_NONE __pgprot(_PAGE_PROTNONE \| _PAGE_CACHABLE \|_PAGE_ACCESSED \| _PAGE_FLAGS_HARD)
121	#define PAGE_SHARED __pgprot(_PAGE_PRESENT \| _PAGE_RW \| _PAGE_USER \| _PAGE_CACHABLE \|_PAGE_ACCESSED \| _PAGE_SHARED \| _PAGE_FLAGS_HARD)
122	#define PAGE_COPY __pgprot(_PAGE_PRESENT \| _PAGE_USER \| _PAGE_CACHABLE \| _PAGE_ACCESSED \| _PAGE_FLAGS_HARD)
123	#define PAGE_READONLY __pgprot(_PAGE_PRESENT \| _PAGE_USER \| _PAGE_CACHABLE \| _PAGE_ACCESSED \| _PAGE_FLAGS_HARD)
124	#define PAGE_KERNEL __pgprot(_PAGE_PRESENT \| _PAGE_RW \| _PAGE_CACHABLE \| _PAGE_DIRTY \| _PAGE_ACCESSED \| _PAGE_HW_SHARED \| _PAGE_FLAGS_HARD)
125	#define PAGE_KERNEL_NOCACHE \
126	__pgprot(_PAGE_PRESENT \| _PAGE_RW \| _PAGE_DIRTY \| _PAGE_ACCESSED \| _PAGE_HW_SHARED \| _PAGE_FLAGS_HARD)
127	#define PAGE_KERNEL_RO __pgprot(_PAGE_PRESENT \| _PAGE_CACHABLE \| _PAGE_DIRTY \| _PAGE_ACCESSED \| _PAGE_HW_SHARED \| _PAGE_FLAGS_HARD)
128	#define PAGE_KERNEL_PCC(slot, type) \
129	__pgprot(_PAGE_PRESENT \| _PAGE_RW \| _PAGE_DIRTY \| _PAGE_ACCESSED \| _PAGE_FLAGS_HARD \| (slot ? _PAGE_PCC_AREA5 : _PAGE_PCC_AREA6) \| (type))
130	#else /* no mmu */
131	#define PAGE_NONE __pgprot(0)
132	#define PAGE_SHARED __pgprot(0)
133	#define PAGE_COPY __pgprot(0)
134	#define PAGE_READONLY __pgprot(0)
135	#define PAGE_KERNEL __pgprot(0)
136	#define PAGE_KERNEL_NOCACHE __pgprot(0)
137	#define PAGE_KERNEL_RO __pgprot(0)
138	#define PAGE_KERNEL_PCC __pgprot(0)
139	#endif
140
141	/*
142	* As i386 and MIPS, SuperH can't do page protection for execute, and
143	* considers that the same as a read. Also, write permissions imply
144	* read permissions. This is the closest we can get..
145	*/
146
147	#define __P000 PAGE_NONE
148	#define __P001 PAGE_READONLY
149	#define __P010 PAGE_COPY
150	#define __P011 PAGE_COPY
151	#define __P100 PAGE_READONLY
152	#define __P101 PAGE_READONLY
153	#define __P110 PAGE_COPY
154	#define __P111 PAGE_COPY
155
156	#define __S000 PAGE_NONE
157	#define __S001 PAGE_READONLY
158	#define __S010 PAGE_SHARED
159	#define __S011 PAGE_SHARED
160	#define __S100 PAGE_READONLY
161	#define __S101 PAGE_READONLY
162	#define __S110 PAGE_SHARED
163	#define __S111 PAGE_SHARED
164
165	#define pte_none(x) (!pte_val(x))
166	#define pte_present(x) (pte_val(x) & (_PAGE_PRESENT \| _PAGE_PROTNONE))
167	#define pte_clear(mm,addr,xp) do { set_pte_at(mm, addr, xp, __pte(0)); } while (0)
168
169	#define pmd_none(x) (!pmd_val(x))
170	#define pmd_present(x) (pmd_val(x) & _PAGE_PRESENT)
171	#define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0)
172	#define pmd_bad(x) ((pmd_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE)
173
174	#define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT))
175	#define pte_page(x) phys_to_page(pte_val(x)&PTE_PHYS_MASK)
176
177	/*
178	* The following only work if pte_present() is true.
179	* Undefined behaviour if not..
180	*/
181	static inline int pte_read(pte_t pte) { return pte_val(pte) & _PAGE_USER; }
182	static inline int pte_exec(pte_t pte) { return pte_val(pte) & _PAGE_USER; }
183	static inline int pte_dirty(pte_t pte){ return pte_val(pte) & _PAGE_DIRTY; }
184	static inline int pte_young(pte_t pte){ return pte_val(pte) & _PAGE_ACCESSED; }
185	static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE; }
186	static inline int pte_write(pte_t pte){ return pte_val(pte) & _PAGE_RW; }
187	static inline int pte_not_present(pte_t pte){ return !(pte_val(pte) & _PAGE_PRESENT); }
188
189	static inline pte_t pte_rdprotect(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_USER)); return pte; }
190	static inline pte_t pte_exprotect(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_USER)); return pte; }
191	static inline pte_t pte_mkclean(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_DIRTY)); return pte; }
192	static inline pte_t pte_mkold(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_ACCESSED)); return pte; }
193	static inline pte_t pte_wrprotect(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_RW)); return pte; }
194	static inline pte_t pte_mkread(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) \| _PAGE_USER)); return pte; }
195	static inline pte_t pte_mkexec(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) \| _PAGE_USER)); return pte; }
196	static inline pte_t pte_mkdirty(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) \| _PAGE_DIRTY)); return pte; }
197	static inline pte_t pte_mkyoung(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) \| _PAGE_ACCESSED)); return pte; }
198	static inline pte_t pte_mkwrite(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) \| _PAGE_RW)); return pte; }
d229401f	199	#ifdef CONFIG_HUGETLB_PAGE
63551ae0	200	static inline pte_t pte_mkhuge(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) \| _PAGE_SZHUGE)); return pte; }
d229401f	201	#endif
1da177e4 LT	202
	203	/*
	204	* Macro and implementation to make a page protection as uncachable.
	205	*/
	206	#define pgprot_noncached pgprot_noncached
	207
	208	static inline pgprot_t pgprot_noncached(pgprot_t _prot)
	209	{
	210	unsigned long prot = pgprot_val(_prot);
	211
	212	prot &= ~_PAGE_CACHABLE;
	213	return __pgprot(prot);
	214	}
	215
	216	#define pgprot_writecombine(prot) __pgprot(pgprot_val(prot) & ~_PAGE_CACHABLE)
	217
	218	/*
	219	* Conversion functions: convert a page and protection to a page entry,
	220	* and a page entry and page directory to the page they refer to.
	221	*
	222	* extern pte_t mk_pte(struct page *page, pgprot_t pgprot)
	223	*/
	224	#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
	225
	226	static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
	227	{ set_pte(&pte, __pte((pte_val(pte) & _PAGE_CHG_MASK) \| pgprot_val(newprot))); return pte; }
	228
1da177e4 LT	229	#define pmd_page_kernel(pmd) \
	230	((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
	231
	232	#define pmd_page(pmd) \
	233	(phys_to_page(pmd_val(pmd)))
	234
	235	/* to find an entry in a page-table-directory. */
	236	#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
	237	#define pgd_offset(mm, address) ((mm)->pgd+pgd_index(address))
	238
	239	/* to find an entry in a kernel page-table-directory */
	240	#define pgd_offset_k(address) pgd_offset(&init_mm, address)
	241
	242	/* Find an entry in the third-level page table.. */
	243	#define pte_index(address) \
	244	((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
	245	#define pte_offset_kernel(dir, address) \
	246	((pte_t ) pmd_page_kernel((dir)) + pte_index(address))
	247	#define pte_offset_map(dir, address) pte_offset_kernel(dir, address)
	248	#define pte_offset_map_nested(dir, address) pte_offset_kernel(dir, address)
	249	#define pte_unmap(pte) do { } while (0)
	250	#define pte_unmap_nested(pte) do { } while (0)
	251
	252	struct vm_area_struct;
	253	extern void update_mmu_cache(struct vm_area_struct * vma,
	254	unsigned long address, pte_t pte);
	255
	256	/* Encode and de-code a swap entry */
	257	/*
	258	* NOTE: We should set ZEROs at the position of _PAGE_PRESENT
	259	* and _PAGE_PROTNONE bits
	260	*/
	261	#define __swp_type(x) ((x).val & 0xff)
	262	#define __swp_offset(x) ((x).val >> 10)
	263	#define __swp_entry(type, offset) ((swp_entry_t) { (type) \| ((offset) << 10) })
	264	#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) >> 1 })
	265	#define __swp_entry_to_pte(x) ((pte_t) { (x).val << 1 })
	266
	267	/*
	268	* Encode and decode a nonlinear file mapping entry
	269	*/
	270	#define PTE_FILE_MAX_BITS 29
	271	#define pte_to_pgoff(pte) (pte_val(pte) >> 1)
	272	#define pgoff_to_pte(off) ((pte_t) { ((off) << 1) \| _PAGE_FILE })
	273
	274	typedef pte_t *pte_addr_t;
	275
	276	#endif /* !__ASSEMBLY__ */
	277
	278	#define kern_addr_valid(addr) (1)
	279
1da177e4 LT	280	#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
	281	remap_pfn_range(vma, vaddr, pfn, size, prot)
	282
	283	#define MK_IOSPACE_PFN(space, pfn) (pfn)
	284	#define GET_IOSPACE(pfn) 0
	285	#define GET_PFN(pfn) (pfn)
	286
8c65b4a6 TS	287	struct mm_struct;
8c65b4a6 TS	288
1da177e4 LT	289	/*
	290	* No page table caches to initialise
	291	*/
	292	#define pgtable_cache_init() do { } while (0)
	293
	294	#ifndef CONFIG_MMU
	295	extern unsigned int kobjsize(const void *objp);
	296	#endif /* !CONFIG_MMU */
	297
	298	#if defined(CONFIG_CPU_SH4) \|\| defined(CONFIG_SH7705_CACHE_32KB)
	299	#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
	300	extern pte_t ptep_get_and_clear(struct mm_struct mm, unsigned long addr, pte_t ptep);
	301	#endif
	302
	303	#include <asm-generic/pgtable.h>
	304
	305	#endif /* __ASM_SH_PAGE_H */
	306