[net-next-2.6.git] / arch / x86 / include / asm / pgtable_32_types.h

#ifndef _ASM_X86_PGTABLE_32_DEFS_H
#define _ASM_X86_PGTABLE_32_DEFS_H

/*
 * The Linux x86 paging architecture is 'compile-time dual-mode', it
 * implements both the traditional 2-level x86 page tables and the
 * newer 3-level PAE-mode page tables.
 */
#ifdef CONFIG_X86_PAE
# include <asm/pgtable-3level_types.h>
# define PMD_SIZE	(1UL << PMD_SHIFT)
# define PMD_MASK	(~(PMD_SIZE - 1))
#else
# include <asm/pgtable-2level_types.h>
#endif

#define PGDIR_SIZE	(1UL << PGDIR_SHIFT)
#define PGDIR_MASK	(~(PGDIR_SIZE - 1))

/* Just any arbitrary offset to the start of the vmalloc VM area: the
 * current 8MB value just means that there will be a 8MB "hole" after the
 * physical memory until the kernel virtual memory starts.  That means that
 * any out-of-bounds memory accesses will hopefully be caught.
 * The vmalloc() routines leaves a hole of 4kB between each vmalloced
 * area for the same reason. ;)
 */
#define VMALLOC_OFFSET	(8 * 1024 * 1024)

#ifndef __ASSEMBLY__
extern bool __vmalloc_start_set; /* set once high_memory is set */
#endif

#define VMALLOC_START	((unsigned long)high_memory + VMALLOC_OFFSET)
#ifdef CONFIG_X86_PAE
#define LAST_PKMAP 512
#else
#define LAST_PKMAP 1024
#endif

#define PKMAP_BASE ((FIXADDR_BOOT_START - PAGE_SIZE * (LAST_PKMAP + 1))	\
		    & PMD_MASK)

#ifdef CONFIG_HIGHMEM
# define VMALLOC_END	(PKMAP_BASE - 2 * PAGE_SIZE)
#else
# define VMALLOC_END	(FIXADDR_START - 2 * PAGE_SIZE)
#endif

#define MODULES_VADDR	VMALLOC_START
#define MODULES_END	VMALLOC_END
#define MODULES_LEN	(MODULES_VADDR - MODULES_END)

#define MAXMEM	(VMALLOC_END - PAGE_OFFSET - __VMALLOC_RESERVE)

#endif /* _ASM_X86_PGTABLE_32_DEFS_H */
Commit	Line	Data
f402a65f JF	1	#ifndef _ASM_X86_PGTABLE_32_DEFS_H
	2	#define _ASM_X86_PGTABLE_32_DEFS_H
	3
	4	/*
	5	* The Linux x86 paging architecture is 'compile-time dual-mode', it
	6	* implements both the traditional 2-level x86 page tables and the
	7	* newer 3-level PAE-mode page tables.
	8	*/
	9	#ifdef CONFIG_X86_PAE
	10	# include <asm/pgtable-3level_types.h>
	11	# define PMD_SIZE (1UL << PMD_SHIFT)
	12	# define PMD_MASK (~(PMD_SIZE - 1))
	13	#else
	14	# include <asm/pgtable-2level_types.h>
	15	#endif
	16
	17	#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
	18	#define PGDIR_MASK (~(PGDIR_SIZE - 1))
	19
	20	/* Just any arbitrary offset to the start of the vmalloc VM area: the
	21	* current 8MB value just means that there will be a 8MB "hole" after the
	22	* physical memory until the kernel virtual memory starts. That means that
	23	* any out-of-bounds memory accesses will hopefully be caught.
	24	* The vmalloc() routines leaves a hole of 4kB between each vmalloced
	25	* area for the same reason. ;)
	26	*/
	27	#define VMALLOC_OFFSET (8 * 1024 * 1024)
dc16ecf7	28
fc4ac7a5	29	#ifndef __ASSEMBLY__
dc16ecf7 JF	30	extern bool __vmalloc_start_set; /* set once high_memory is set */
	31	#endif
	32
f402a65f JF	33	#define VMALLOC_START ((unsigned long)high_memory + VMALLOC_OFFSET)
	34	#ifdef CONFIG_X86_PAE
	35	#define LAST_PKMAP 512
	36	#else
	37	#define LAST_PKMAP 1024
	38	#endif
	39
	40	#define PKMAP_BASE ((FIXADDR_BOOT_START - PAGE_SIZE * (LAST_PKMAP + 1)) \
	41	& PMD_MASK)
	42
	43	#ifdef CONFIG_HIGHMEM
	44	# define VMALLOC_END (PKMAP_BASE - 2 * PAGE_SIZE)
	45	#else
	46	# define VMALLOC_END (FIXADDR_START - 2 * PAGE_SIZE)
	47	#endif
	48
c398df30 AW	49	#define MODULES_VADDR VMALLOC_START
	50	#define MODULES_END VMALLOC_END
	51	#define MODULES_LEN (MODULES_VADDR - MODULES_END)
	52
f402a65f JF	53	#define MAXMEM (VMALLOC_END - PAGE_OFFSET - __VMALLOC_RESERVE)
	54
	55	#endif /* _ASM_X86_PGTABLE_32_DEFS_H */