[linux-2.6-block.git] / arch / x86 / include / asm / page_types.h

#ifndef _ASM_X86_PAGE_DEFS_H
#define _ASM_X86_PAGE_DEFS_H

#include <linux/const.h>

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

#define __PHYSICAL_MASK		((phys_addr_t)(1ULL << __PHYSICAL_MASK_SHIFT) - 1)
#define __VIRTUAL_MASK		((1UL << __VIRTUAL_MASK_SHIFT) - 1)

/* Cast PAGE_MASK to a signed type so that it is sign-extended if
   virtual addresses are 32-bits but physical addresses are larger
   (ie, 32-bit PAE). */
#define PHYSICAL_PAGE_MASK	(((signed long)PAGE_MASK) & __PHYSICAL_MASK)

#define PMD_PAGE_SIZE		(_AC(1, UL) << PMD_SHIFT)
#define PMD_PAGE_MASK		(~(PMD_PAGE_SIZE-1))

#define HPAGE_SHIFT		PMD_SHIFT
#define HPAGE_SIZE		(_AC(1,UL) << HPAGE_SHIFT)
#define HPAGE_MASK		(~(HPAGE_SIZE - 1))
#define HUGETLB_PAGE_ORDER	(HPAGE_SHIFT - PAGE_SHIFT)

#define HUGE_MAX_HSTATE 2

#define PAGE_OFFSET		((unsigned long)__PAGE_OFFSET)

#define VM_DATA_DEFAULT_FLAGS \
	(((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \
	 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)

#ifdef CONFIG_X86_64
#include <asm/page_64_types.h>
#else
#include <asm/page_32_types.h>
#endif	/* CONFIG_X86_64 */

#ifndef __ASSEMBLY__

extern int page_is_ram(unsigned long pagenr);
extern int devmem_is_allowed(unsigned long pagenr);

extern unsigned long max_low_pfn_mapped;
extern unsigned long max_pfn_mapped;

extern unsigned long init_memory_mapping(unsigned long start,
					 unsigned long end);

extern void initmem_init(unsigned long start_pfn, unsigned long end_pfn);
extern void free_initmem(void);

#endif	/* !__ASSEMBLY__ */

#endif	/* _ASM_X86_PAGE_DEFS_H */
Commit	Line	Data
51c78eb3 JF	1	#ifndef _ASM_X86_PAGE_DEFS_H
	2	#define _ASM_X86_PAGE_DEFS_H
	3
	4	#include <linux/const.h>
	5
	6	/* PAGE_SHIFT determines the page size */
	7	#define PAGE_SHIFT 12
	8	#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
	9	#define PAGE_MASK (~(PAGE_SIZE-1))
	10
	11	#define __PHYSICAL_MASK ((phys_addr_t)(1ULL << __PHYSICAL_MASK_SHIFT) - 1)
	12	#define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1)
	13
	14	/* Cast PAGE_MASK to a signed type so that it is sign-extended if
	15	virtual addresses are 32-bits but physical addresses are larger
	16	(ie, 32-bit PAE). */
	17	#define PHYSICAL_PAGE_MASK (((signed long)PAGE_MASK) & __PHYSICAL_MASK)
	18
51c78eb3 JF	19	#define PMD_PAGE_SIZE (_AC(1, UL) << PMD_SHIFT)
	20	#define PMD_PAGE_MASK (~(PMD_PAGE_SIZE-1))
	21
	22	#define HPAGE_SHIFT PMD_SHIFT
	23	#define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT)
	24	#define HPAGE_MASK (~(HPAGE_SIZE - 1))
	25	#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
	26
	27	#define HUGE_MAX_HSTATE 2
	28
	29	#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
	30
	31	#define VM_DATA_DEFAULT_FLAGS \
	32	(((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) \| \
	33	VM_READ \| VM_WRITE \| VM_MAYREAD \| VM_MAYWRITE \| VM_MAYEXEC)
	34
	35	#ifdef CONFIG_X86_64
	36	#include <asm/page_64_types.h>
	37	#else
	38	#include <asm/page_32_types.h>
	39	#endif /* CONFIG_X86_64 */
	40
	41	#ifndef __ASSEMBLY__
	42
51c78eb3	43	extern int page_is_ram(unsigned long pagenr);
51c78eb3	44	extern int devmem_is_allowed(unsigned long pagenr);
51c78eb3 JF	45
	46	extern unsigned long max_low_pfn_mapped;
	47	extern unsigned long max_pfn_mapped;
	48
66aa230e JSR	49	extern unsigned long init_memory_mapping(unsigned long start,
	50	unsigned long end);
	51
	52	extern void initmem_init(unsigned long start_pfn, unsigned long end_pfn);
	53	extern void free_initmem(void);
	54
51c78eb3 JF	55	#endif /* !__ASSEMBLY__ */
	56
	57	#endif /* _ASM_X86_PAGE_DEFS_H */