[mirror_ubuntu-jammy-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
 */

#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)
#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)

#ifndef __ASSEMBLY__

/* Pure 2^n version of get_order */
static __inline__ int get_order(unsigned long size)
{
	int order;

	size = (size-1) >> (PAGE_SHIFT-1);
	order = -1;
	do {
		size >>= 1;
		order++;
	} while (size);
	return order;
}

#endif

#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
	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)
	34	#endif
	35
	36	#ifdef __KERNEL__
	37	#ifndef __ASSEMBLY__
	38
	39	extern void (clear_page)(void to);
	40	extern void (copy_page)(void to, void *from);
	41
	42	extern void clear_page_slow(void *to);
	43	extern void copy_page_slow(void to, void from);
	44
	45	#if defined(CONFIG_SH7705_CACHE_32KB) && defined(CONFIG_MMU)
	46	struct page;
	47	extern void clear_user_page(void to, unsigned long address, struct page pg);
	48	extern void copy_user_page(void to, void from, unsigned long address, struct page *pg);
	49	extern void __clear_user_page(void to, void orig_to);
	50	extern void __copy_user_page(void to, void from, void *orig_to);
	51	#elif defined(CONFIG_CPU_SH2) \|\| defined(CONFIG_CPU_SH3) \|\| !defined(CONFIG_MMU)
	52	#define clear_user_page(page, vaddr, pg) clear_page(page)
	53	#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
	54	#elif defined(CONFIG_CPU_SH4)
	55	struct page;
	56	extern void clear_user_page(void to, unsigned long address, struct page pg);
	57	extern void copy_user_page(void to, void from, unsigned long address, struct page *pg);
	58	extern void __clear_user_page(void to, void orig_to);
	59	extern void __copy_user_page(void to, void from, void *orig_to);
	60	#endif
	61
	62	/*
	63	* These are used to make use of C type-checking..
	64	*/
65	typedef struct { unsigned long pte; } pte_t;
66	typedef struct { unsigned long pmd; } pmd_t;
67	typedef struct { unsigned long pgd; } pgd_t;
68	typedef struct { unsigned long pgprot; } pgprot_t;
69
70	#define pte_val(x) ((x).pte)
71	#define pmd_val(x) ((x).pmd)
72	#define pgd_val(x) ((x).pgd)
73	#define pgprot_val(x) ((x).pgprot)
74
75	#define __pte(x) ((pte_t) { (x) } )
76	#define __pmd(x) ((pmd_t) { (x) } )
77	#define __pgd(x) ((pgd_t) { (x) } )
78	#define __pgprot(x) ((pgprot_t) { (x) } )
79
80	#endif /* !__ASSEMBLY__ */
81
82	/* to align the pointer to the (next) page boundary */
83	#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
84
85	/*
86	* IF YOU CHANGE THIS, PLEASE ALSO CHANGE
87	*
88	* arch/sh/kernel/vmlinux.lds.S
89	*
90	* which has the same constant encoded..
91	*/
92
93	#define __MEMORY_START CONFIG_MEMORY_START
94	#define __MEMORY_SIZE CONFIG_MEMORY_SIZE
95	#ifdef CONFIG_DISCONTIGMEM
96	/* Just for HP690, for now.. */
97	#define __MEMORY_START_2ND (__MEMORY_START+0x02000000)
98	#define __MEMORY_SIZE_2ND 0x001000000 /* 16MB */
99	#endif
100
101	#define PAGE_OFFSET (0x80000000UL)
102	#define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
103	#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
104
105	#define MAP_NR(addr) (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT)
106
107	#ifndef CONFIG_DISCONTIGMEM
108	#define phys_to_page(phys) (mem_map + (((phys)-__MEMORY_START) >> PAGE_SHIFT))
109	#define page_to_phys(page) (((page - mem_map) << PAGE_SHIFT) + __MEMORY_START)
110	#endif
111
112	/* PFN start number, because of __MEMORY_START */
113	#define PFN_START (__MEMORY_START >> PAGE_SHIFT)
114
115	#define pfn_to_page(pfn) (mem_map + (pfn) - PFN_START)
116	#define page_to_pfn(page) ((unsigned long)((page) - mem_map) + PFN_START)
117	#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
118	#define pfn_valid(pfn) (((pfn) - PFN_START) < max_mapnr)
119	#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
120
121	#define VM_DATA_DEFAULT_FLAGS (VM_READ \| VM_WRITE \| VM_EXEC \| \
122	VM_MAYREAD \| VM_MAYWRITE \| VM_MAYEXEC)
123
124	#ifndef __ASSEMBLY__
125
126	/* Pure 2^n version of get_order */
127	static __inline__ int get_order(unsigned long size)
128	{
129	int order;
130
131	size = (size-1) >> (PAGE_SHIFT-1);
132	order = -1;
133	do {
134	size >>= 1;
135	order++;
136	} while (size);
137	return order;
138	}
139
140	#endif
141
142	#endif /* __KERNEL__ */
143
144	#endif /* __ASM_SH_PAGE_H */