[mirror_ubuntu-bionic-kernel.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
 */


/* 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)
#endif

#ifdef __KERNEL__
#ifndef __ASSEMBLY__

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

#ifdef CONFIG_MMU
extern void clear_page_slow(void *to);
extern void copy_page_slow(void *to, void *from);
#else
extern void clear_page_nommu(void *to);
extern void copy_page_nommu(void *to, void *from);
#endif

#if defined(CONFIG_MMU) && (defined(CONFIG_CPU_SH4) || \
	defined(CONFIG_SH7705_CACHE_32KB))
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)
#endif

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

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

#define __pte(x) ((pte_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

#define PAGE_OFFSET		CONFIG_PAGE_OFFSET
#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)

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

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

#include <asm-generic/memory_model.h>
#include <asm-generic/page.h>

#endif /* __KERNEL__ */
#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
1da177e4 LT	16
	17	/* PAGE_SHIFT determines the page size */
	18	#define PAGE_SHIFT 12
	19	#define PAGE_SIZE (1UL << PAGE_SHIFT)
	20	#define PAGE_MASK (~(PAGE_SIZE-1))
	21	#define PTE_MASK PAGE_MASK
	22
	23	#if defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
	24	#define HPAGE_SHIFT 16
	25	#elif defined(CONFIG_HUGETLB_PAGE_SIZE_1MB)
	26	#define HPAGE_SHIFT 20
	27	#endif
	28
	29	#ifdef CONFIG_HUGETLB_PAGE
	30	#define HPAGE_SIZE (1UL << HPAGE_SHIFT)
	31	#define HPAGE_MASK (~(HPAGE_SIZE-1))
	32	#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT-PAGE_SHIFT)
	33	#endif
	34
	35	#ifdef __KERNEL__
	36	#ifndef __ASSEMBLY__
	37
	38	extern void (clear_page)(void to);
	39	extern void (copy_page)(void to, void *from);
	40
e96636cc	41	#ifdef CONFIG_MMU
1da177e4 LT	42	extern void clear_page_slow(void *to);
1da177e4 LT	43	extern void copy_page_slow(void to, void from);
e96636cc YS	44	#else
	45	extern void clear_page_nommu(void *to);
	46	extern void copy_page_nommu(void to, void from);
	47	#endif
1da177e4	48
26ff6c11 PM	49	#if defined(CONFIG_MMU) && (defined(CONFIG_CPU_SH4) \|\| \
26ff6c11 PM	50	defined(CONFIG_SH7705_CACHE_32KB))
1da177e4 LT	51	struct page;
	52	extern void clear_user_page(void to, unsigned long address, struct page pg);
	53	extern void copy_user_page(void to, void from, unsigned long address, struct page *pg);
	54	extern void __clear_user_page(void to, void orig_to);
	55	extern void __copy_user_page(void to, void from, void *orig_to);
	56	#elif defined(CONFIG_CPU_SH2) \|\| defined(CONFIG_CPU_SH3) \|\| !defined(CONFIG_MMU)
	57	#define clear_user_page(page, vaddr, pg) clear_page(page)
	58	#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
1da177e4 LT	59	#endif
	60
	61	/*
	62	* These are used to make use of C type-checking..
	63	*/
	64	typedef struct { unsigned long pte; } pte_t;
1da177e4 LT	65	typedef struct { unsigned long pgd; } pgd_t;
	66	typedef struct { unsigned long pgprot; } pgprot_t;
	67
	68	#define pte_val(x) ((x).pte)
1da177e4 LT	69	#define pgd_val(x) ((x).pgd)
	70	#define pgprot_val(x) ((x).pgprot)
	71
	72	#define __pte(x) ((pte_t) { (x) } )
1da177e4 LT	73	#define __pgd(x) ((pgd_t) { (x) } )
	74	#define __pgprot(x) ((pgprot_t) { (x) } )
	75
	76	#endif /* !__ASSEMBLY__ */
	77
	78	/* to align the pointer to the (next) page boundary */
	79	#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
	80
	81	/*
	82	* IF YOU CHANGE THIS, PLEASE ALSO CHANGE
	83	*
	84	* arch/sh/kernel/vmlinux.lds.S
	85	*
	86	* which has the same constant encoded..
	87	*/
	88
	89	#define __MEMORY_START CONFIG_MEMORY_START
	90	#define __MEMORY_SIZE CONFIG_MEMORY_SIZE
1da177e4	91
e7f93a35	92	#define PAGE_OFFSET CONFIG_PAGE_OFFSET
1da177e4 LT	93	#define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
	94	#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
	95
	96	#define MAP_NR(addr) (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT)
	97
1da177e4 LT	98	#define phys_to_page(phys) (mem_map + (((phys)-__MEMORY_START) >> PAGE_SHIFT))
1da177e4 LT	99	#define page_to_phys(page) (((page - mem_map) << PAGE_SHIFT) + __MEMORY_START)
1da177e4 LT	100
	101	/* PFN start number, because of __MEMORY_START */
	102	#define PFN_START (__MEMORY_START >> PAGE_SHIFT)
67bb2c69	103	#define ARCH_PFN_OFFSET (PFN_START)
1da177e4 LT	104	#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
	105	#define pfn_valid(pfn) (((pfn) - PFN_START) < max_mapnr)
	106	#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
	107
	108	#define VM_DATA_DEFAULT_FLAGS (VM_READ \| VM_WRITE \| VM_EXEC \| \
	109	VM_MAYREAD \| VM_MAYWRITE \| VM_MAYEXEC)
	110
104b8dea	111	#include <asm-generic/memory_model.h>
fd4fd5aa SR	112	#include <asm-generic/page.h>
fd4fd5aa SR	113
b5233d07	114	#endif /* __KERNEL__ */
1da177e4	115	#endif /* __ASM_SH_PAGE_H */