[linux-2.6-block.git] / include / asm-sh / page.h

#ifndef __ASM_SH_PAGE_H
#define __ASM_SH_PAGE_H

/*
 * Copyright (C) 1999  Niibe Yutaka
 */

/*
   [ P0/U0 (virtual) ]		0x00000000     <------ User space
   [ P1 (fixed)   cached ]	0x80000000     <------ Kernel space
   [ P2 (fixed)  non-cachable]	0xA0000000     <------ Physical access
   [ P3 (virtual) cached]	0xC0000000     <------ vmalloced area
   [ P4 control   ]		0xE0000000
 */

#include <linux/config.h>

/* PAGE_SHIFT determines the page size */
#define PAGE_SHIFT	12
#define PAGE_SIZE	(1UL << PAGE_SHIFT)
#define PAGE_MASK	(~(PAGE_SIZE-1))
#define PTE_MASK	PAGE_MASK

#if defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
#define HPAGE_SHIFT	16
#elif defined(CONFIG_HUGETLB_PAGE_SIZE_1MB)
#define HPAGE_SHIFT	20
#endif

#ifdef CONFIG_HUGETLB_PAGE
#define HPAGE_SIZE		(1UL << HPAGE_SHIFT)
#define HPAGE_MASK		(~(HPAGE_SIZE-1))
#define HUGETLB_PAGE_ORDER	(HPAGE_SHIFT-PAGE_SHIFT)
#define ARCH_HAS_SETCLEAR_HUGE_PTE
#endif

#ifdef __KERNEL__
#ifndef __ASSEMBLY__

extern void (*clear_page)(void *to);
extern void (*copy_page)(void *to, void *from);

extern void clear_page_slow(void *to);
extern void copy_page_slow(void *to, void *from);

#if defined(CONFIG_SH7705_CACHE_32KB) && defined(CONFIG_MMU)
struct page;
extern void clear_user_page(void *to, unsigned long address, struct page *pg);
extern void copy_user_page(void *to, void *from, unsigned long address, struct page *pg);
extern void __clear_user_page(void *to, void *orig_to);
extern void __copy_user_page(void *to, void *from, void *orig_to);
#elif defined(CONFIG_CPU_SH2) || defined(CONFIG_CPU_SH3) || !defined(CONFIG_MMU)
#define clear_user_page(page, vaddr, pg)	clear_page(page)
#define copy_user_page(to, from, vaddr, pg)	copy_page(to, from)
#elif defined(CONFIG_CPU_SH4)
struct page;
extern void clear_user_page(void *to, unsigned long address, struct page *pg);
extern void copy_user_page(void *to, void *from, unsigned long address, struct page *pg);
extern void __clear_user_page(void *to, void *orig_to);
extern void __copy_user_page(void *to, void *from, void *orig_to);
#endif

/*
 * These are used to make use of C type-checking..
 */
typedef struct { unsigned long pte; } pte_t;
typedef struct { unsigned long pmd; } pmd_t;
typedef struct { unsigned long pgd; } pgd_t;
typedef struct { unsigned long pgprot; } pgprot_t;

#define pte_val(x)	((x).pte)
#define pmd_val(x)	((x).pmd)
#define pgd_val(x)	((x).pgd)
#define pgprot_val(x)	((x).pgprot)

#define __pte(x) ((pte_t) { (x) } )
#define __pmd(x) ((pmd_t) { (x) } )
#define __pgd(x) ((pgd_t) { (x) } )
#define __pgprot(x)	((pgprot_t) { (x) } )

#endif /* !__ASSEMBLY__ */

/* to align the pointer to the (next) page boundary */
#define PAGE_ALIGN(addr)	(((addr)+PAGE_SIZE-1)&PAGE_MASK)

/*
 * IF YOU CHANGE THIS, PLEASE ALSO CHANGE
 *
 *	arch/sh/kernel/vmlinux.lds.S
 *
 * which has the same constant encoded..
 */

#define __MEMORY_START		CONFIG_MEMORY_START
#define __MEMORY_SIZE		CONFIG_MEMORY_SIZE
#ifdef CONFIG_DISCONTIGMEM
/* Just for HP690, for now.. */
#define __MEMORY_START_2ND	(__MEMORY_START+0x02000000)
#define __MEMORY_SIZE_2ND	0x001000000 /* 16MB */
#endif

#define PAGE_OFFSET		(0x80000000UL)
#define __pa(x)			((unsigned long)(x)-PAGE_OFFSET)
#define __va(x)			((void *)((unsigned long)(x)+PAGE_OFFSET))

#define MAP_NR(addr)		(((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT)

#ifndef CONFIG_DISCONTIGMEM
#define phys_to_page(phys)	(mem_map + (((phys)-__MEMORY_START) >> PAGE_SHIFT))
#define page_to_phys(page)	(((page - mem_map) << PAGE_SHIFT) + __MEMORY_START)
#endif

/* PFN start number, because of __MEMORY_START */
#define PFN_START		(__MEMORY_START >> PAGE_SHIFT)

#define pfn_to_page(pfn)	(mem_map + (pfn) - PFN_START)
#define page_to_pfn(page)	((unsigned long)((page) - mem_map) + PFN_START)
#define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
#define pfn_valid(pfn)		(((pfn) - PFN_START) < max_mapnr)
#define virt_addr_valid(kaddr)	pfn_valid(__pa(kaddr) >> PAGE_SHIFT)

#define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \
				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)

#endif /* __KERNEL__ */

#include <asm-generic/page.h>

#endif /* __ASM_SH_PAGE_H */
Commit	Line	Data
1da177e4 LT	1	#ifndef __ASM_SH_PAGE_H
	2	#define __ASM_SH_PAGE_H
	3
	4	/*
	5	* Copyright (C) 1999 Niibe Yutaka
	6	*/
	7
	8	/*
	9	[ P0/U0 (virtual) ] 0x00000000 <------ User space
	10	[ P1 (fixed) cached ] 0x80000000 <------ Kernel space
	11	[ P2 (fixed) non-cachable] 0xA0000000 <------ Physical access
	12	[ P3 (virtual) cached] 0xC0000000 <------ vmalloced area
	13	[ P4 control ] 0xE0000000
	14	*/
	15
	16	#include <linux/config.h>
	17
	18	/* PAGE_SHIFT determines the page size */
	19	#define PAGE_SHIFT 12
	20	#define PAGE_SIZE (1UL << PAGE_SHIFT)
	21	#define PAGE_MASK (~(PAGE_SIZE-1))
	22	#define PTE_MASK PAGE_MASK
	23
	24	#if defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
	25	#define HPAGE_SHIFT 16
	26	#elif defined(CONFIG_HUGETLB_PAGE_SIZE_1MB)
	27	#define HPAGE_SHIFT 20
	28	#endif
	29
	30	#ifdef CONFIG_HUGETLB_PAGE
	31	#define HPAGE_SIZE (1UL << HPAGE_SHIFT)
	32	#define HPAGE_MASK (~(HPAGE_SIZE-1))
	33	#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT-PAGE_SHIFT)
63551ae0	34	#define ARCH_HAS_SETCLEAR_HUGE_PTE
1da177e4 LT	35	#endif
	36
	37	#ifdef __KERNEL__
	38	#ifndef __ASSEMBLY__
	39
	40	extern void (clear_page)(void to);
	41	extern void (copy_page)(void to, void *from);
	42
	43	extern void clear_page_slow(void *to);
	44	extern void copy_page_slow(void to, void from);
	45
	46	#if defined(CONFIG_SH7705_CACHE_32KB) && defined(CONFIG_MMU)
	47	struct page;
	48	extern void clear_user_page(void to, unsigned long address, struct page pg);
	49	extern void copy_user_page(void to, void from, unsigned long address, struct page *pg);
	50	extern void __clear_user_page(void to, void orig_to);
	51	extern void __copy_user_page(void to, void from, void *orig_to);
	52	#elif defined(CONFIG_CPU_SH2) \|\| defined(CONFIG_CPU_SH3) \|\| !defined(CONFIG_MMU)
	53	#define clear_user_page(page, vaddr, pg) clear_page(page)
	54	#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
	55	#elif defined(CONFIG_CPU_SH4)
	56	struct page;
	57	extern void clear_user_page(void to, unsigned long address, struct page pg);
	58	extern void copy_user_page(void to, void from, unsigned long address, struct page *pg);
	59	extern void __clear_user_page(void to, void orig_to);
	60	extern void __copy_user_page(void to, void from, void *orig_to);
	61	#endif
	62
	63	/*
	64	* These are used to make use of C type-checking..
	65	*/
	66	typedef struct { unsigned long pte; } pte_t;
	67	typedef struct { unsigned long pmd; } pmd_t;
	68	typedef struct { unsigned long pgd; } pgd_t;
	69	typedef struct { unsigned long pgprot; } pgprot_t;
	70
	71	#define pte_val(x) ((x).pte)
	72	#define pmd_val(x) ((x).pmd)
	73	#define pgd_val(x) ((x).pgd)
	74	#define pgprot_val(x) ((x).pgprot)
	75
	76	#define __pte(x) ((pte_t) { (x) } )
	77	#define __pmd(x) ((pmd_t) { (x) } )
	78	#define __pgd(x) ((pgd_t) { (x) } )
	79	#define __pgprot(x) ((pgprot_t) { (x) } )
	80
	81	#endif /* !__ASSEMBLY__ */
	82
	83	/* to align the pointer to the (next) page boundary */
	84	#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
	85
	86	/*
	87	* IF YOU CHANGE THIS, PLEASE ALSO CHANGE
	88	*
	89	* arch/sh/kernel/vmlinux.lds.S
	90	*
	91	* which has the same constant encoded..
	92	*/
	93
	94	#define __MEMORY_START CONFIG_MEMORY_START
	95	#define __MEMORY_SIZE CONFIG_MEMORY_SIZE
	96	#ifdef CONFIG_DISCONTIGMEM
	97	/* Just for HP690, for now.. */
	98	#define __MEMORY_START_2ND (__MEMORY_START+0x02000000)
99	#define __MEMORY_SIZE_2ND 0x001000000 /* 16MB */
100	#endif
101
102	#define PAGE_OFFSET (0x80000000UL)
103	#define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
104	#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
105
106	#define MAP_NR(addr) (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT)
107
108	#ifndef CONFIG_DISCONTIGMEM
109	#define phys_to_page(phys) (mem_map + (((phys)-__MEMORY_START) >> PAGE_SHIFT))
110	#define page_to_phys(page) (((page - mem_map) << PAGE_SHIFT) + __MEMORY_START)
111	#endif
112
113	/* PFN start number, because of __MEMORY_START */
114	#define PFN_START (__MEMORY_START >> PAGE_SHIFT)
115
116	#define pfn_to_page(pfn) (mem_map + (pfn) - PFN_START)
117	#define page_to_pfn(page) ((unsigned long)((page) - mem_map) + PFN_START)
118	#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
119	#define pfn_valid(pfn) (((pfn) - PFN_START) < max_mapnr)
120	#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
121
122	#define VM_DATA_DEFAULT_FLAGS (VM_READ \| VM_WRITE \| VM_EXEC \| \
123	VM_MAYREAD \| VM_MAYWRITE \| VM_MAYEXEC)
124
1da177e4 LT	125	#endif /* __KERNEL__ */
1da177e4 LT	126
fd4fd5aa SR	127	#include <asm-generic/page.h>
fd4fd5aa SR	128
1da177e4	129	#endif /* __ASM_SH_PAGE_H */