[net-next-2.6.git] / arch / m32r / include / asm / page.h

#ifndef _ASM_M32R_PAGE_H
#define _ASM_M32R_PAGE_H

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

#ifndef __ASSEMBLY__

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

#define clear_user_page(page, vaddr, pg)	clear_page(page)
#define copy_user_page(to, from, vaddr, pg)	copy_page(to, from)

#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
	alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE

/*
 * 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;
#define pte_val(x)	((x).pte)
#define PTE_MASK	PAGE_MASK

typedef struct { unsigned long pgprot; } pgprot_t;
typedef struct page *pgtable_t;

#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__ */

/*
 * This handles the memory map.. We could make this a config
 * option, but too many people screw it up, and too few need
 * it.
 *
 * A __PAGE_OFFSET of 0xC0000000 means that the kernel has
 * a virtual address space of one gigabyte, which limits the
 * amount of physical memory you can use to about 950MB.
 *
 * If you want more physical memory than this then see the CONFIG_HIGHMEM4G
 * and CONFIG_HIGHMEM64G options in the kernel configuration.
 */

#define __MEMORY_START  CONFIG_MEMORY_START
#define __MEMORY_SIZE   CONFIG_MEMORY_SIZE

#ifdef CONFIG_MMU
#define __PAGE_OFFSET  (0x80000000)
#else
#define __PAGE_OFFSET  (0x00000000)
#endif

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

#ifndef CONFIG_DISCONTIGMEM
#define PFN_BASE		(CONFIG_MEMORY_START >> PAGE_SHIFT)
#define ARCH_PFN_OFFSET		PFN_BASE
#define pfn_valid(pfn)		(((pfn) - PFN_BASE) < max_mapnr)
#endif  /* !CONFIG_DISCONTIGMEM */

#define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
#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 )

#define devmem_is_allowed(x) 1

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

#endif /* _ASM_M32R_PAGE_H */
Commit	Line	Data
1da177e4 LT	1	#ifndef _ASM_M32R_PAGE_H
	2	#define _ASM_M32R_PAGE_H
	3
1da177e4 LT	4	/* PAGE_SHIFT determines the page size */
	5	#define PAGE_SHIFT 12
	6	#define PAGE_SIZE (1UL << PAGE_SHIFT)
	7	#define PAGE_MASK (~(PAGE_SIZE-1))
	8
1da177e4 LT	9	#ifndef __ASSEMBLY__
	10
	11	extern void clear_page(void *to);
	12	extern void copy_page(void to, void from);
	13
	14	#define clear_user_page(page, vaddr, pg) clear_page(page)
	15	#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
	16
769848c0 MG	17	#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
769848c0 MG	18	alloc_page_vma(GFP_HIGHUSER \| __GFP_ZERO \| movableflags, vma, vaddr)
1da177e4 LT	19	#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
	20
	21	/*
	22	* These are used to make use of C type-checking..
	23	*/
	24	typedef struct { unsigned long pte; } pte_t;
	25	typedef struct { unsigned long pmd; } pmd_t;
	26	typedef struct { unsigned long pgd; } pgd_t;
	27	#define pte_val(x) ((x).pte)
	28	#define PTE_MASK PAGE_MASK
	29
	30	typedef struct { unsigned long pgprot; } pgprot_t;
2f569afd	31	typedef struct page *pgtable_t;
1da177e4 LT	32
	33	#define pmd_val(x) ((x).pmd)
	34	#define pgd_val(x) ((x).pgd)
	35	#define pgprot_val(x) ((x).pgprot)
	36
	37	#define __pte(x) ((pte_t) { (x) } )
	38	#define __pmd(x) ((pmd_t) { (x) } )
	39	#define __pgd(x) ((pgd_t) { (x) } )
	40	#define __pgprot(x) ((pgprot_t) { (x) } )
	41
	42	#endif /* !__ASSEMBLY__ */
	43
1da177e4 LT	44	/*
	45	* This handles the memory map.. We could make this a config
	46	* option, but too many people screw it up, and too few need
	47	* it.
	48	*
	49	* A __PAGE_OFFSET of 0xC0000000 means that the kernel has
	50	* a virtual address space of one gigabyte, which limits the
	51	* amount of physical memory you can use to about 950MB.
	52	*
	53	* If you want more physical memory than this then see the CONFIG_HIGHMEM4G
	54	* and CONFIG_HIGHMEM64G options in the kernel configuration.
	55	*/
	56
1da177e4 LT	57	#define __MEMORY_START CONFIG_MEMORY_START
	58	#define __MEMORY_SIZE CONFIG_MEMORY_SIZE
	59
	60	#ifdef CONFIG_MMU
	61	#define __PAGE_OFFSET (0x80000000)
	62	#else
	63	#define __PAGE_OFFSET (0x00000000)
	64	#endif
	65
	66	#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
	67	#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET)
	68	#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET))
	69
	70	#ifndef CONFIG_DISCONTIGMEM
	71	#define PFN_BASE (CONFIG_MEMORY_START >> PAGE_SHIFT)
7126cffe	72	#define ARCH_PFN_OFFSET PFN_BASE
1da177e4 LT	73	#define pfn_valid(pfn) (((pfn) - PFN_BASE) < max_mapnr)
	74	#endif /* !CONFIG_DISCONTIGMEM */
	75
	76	#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
	77	#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
	78
	79	#define VM_DATA_DEFAULT_FLAGS (VM_READ \| VM_WRITE \| VM_EXEC \| \
	80	VM_MAYREAD \| VM_MAYWRITE \| VM_MAYEXEC )
	81
	82	#define devmem_is_allowed(x) 1
	83
7126cffe	84	#include <asm-generic/memory_model.h>
5b17e1cd	85	#include <asm-generic/getorder.h>
fd4fd5aa	86
1da177e4	87	#endif /* _ASM_M32R_PAGE_H */