[deliverable/linux.git] / arch / x86 / include / asm / page_64.h

#ifndef _ASM_X86_PAGE_64_H
#define _ASM_X86_PAGE_64_H

#define PAGETABLE_LEVELS	4

#define THREAD_ORDER	1
#define THREAD_SIZE  (PAGE_SIZE << THREAD_ORDER)
#define CURRENT_MASK (~(THREAD_SIZE - 1))

#define EXCEPTION_STACK_ORDER 0
#define EXCEPTION_STKSZ (PAGE_SIZE << EXCEPTION_STACK_ORDER)

#define DEBUG_STACK_ORDER (EXCEPTION_STACK_ORDER + 1)
#define DEBUG_STKSZ (PAGE_SIZE << DEBUG_STACK_ORDER)

#define IRQSTACK_ORDER 2
#define IRQSTACKSIZE (PAGE_SIZE << IRQSTACK_ORDER)

#define STACKFAULT_STACK 1
#define DOUBLEFAULT_STACK 2
#define NMI_STACK 3
#define DEBUG_STACK 4
#define MCE_STACK 5
#define N_EXCEPTION_STACKS 5  /* hw limit: 7 */

#define PUD_PAGE_SIZE		(_AC(1, UL) << PUD_SHIFT)
#define PUD_PAGE_MASK		(~(PUD_PAGE_SIZE-1))

/*
 * Set __PAGE_OFFSET to the most negative possible address +
 * PGDIR_SIZE*16 (pgd slot 272).  The gap is to allow a space for a
 * hypervisor to fit.  Choosing 16 slots here is arbitrary, but it's
 * what Xen requires.
 */
#define __PAGE_OFFSET           _AC(0xffff880000000000, UL)

#define __PHYSICAL_START	CONFIG_PHYSICAL_START
#define __KERNEL_ALIGN		0x200000

/*
 * Make sure kernel is aligned to 2MB address. Catching it at compile
 * time is better. Change your config file and compile the kernel
 * for a 2MB aligned address (CONFIG_PHYSICAL_START)
 */
#if (CONFIG_PHYSICAL_START % __KERNEL_ALIGN) != 0
#error "CONFIG_PHYSICAL_START must be a multiple of 2MB"
#endif

#define __START_KERNEL		(__START_KERNEL_map + __PHYSICAL_START)
#define __START_KERNEL_map	_AC(0xffffffff80000000, UL)

/* See Documentation/x86_64/mm.txt for a description of the memory map. */
#define __PHYSICAL_MASK_SHIFT	46
#define __VIRTUAL_MASK_SHIFT	48

/*
 * Kernel image size is limited to 512 MB (see level2_kernel_pgt in
 * arch/x86/kernel/head_64.S), and it is mapped here:
 */
#define KERNEL_IMAGE_SIZE	(512 * 1024 * 1024)
#define KERNEL_IMAGE_START	_AC(0xffffffff80000000, UL)

#ifndef __ASSEMBLY__
void clear_page(void *page);
void copy_page(void *to, void *from);

/* duplicated to the one in bootmem.h */
extern unsigned long max_pfn;
extern unsigned long phys_base;

extern unsigned long __phys_addr(unsigned long);
#define __phys_reloc_hide(x)	(x)

/*
 * These are used to make use of C type-checking..
 */
typedef unsigned long	pteval_t;
typedef unsigned long	pmdval_t;
typedef unsigned long	pudval_t;
typedef unsigned long	pgdval_t;
typedef unsigned long	pgprotval_t;

typedef struct page *pgtable_t;

typedef struct { pteval_t pte; } pte_t;

#define vmemmap ((struct page *)VMEMMAP_START)

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);

extern void init_extra_mapping_uc(unsigned long phys, unsigned long size);
extern void init_extra_mapping_wb(unsigned long phys, unsigned long size);

#endif	/* !__ASSEMBLY__ */

#ifdef CONFIG_FLATMEM
#define pfn_valid(pfn)          ((pfn) < max_pfn)
#endif


#endif /* _ASM_X86_PAGE_64_H */
Commit	Line	Data
1965aae3 PA	1	#ifndef _ASM_X86_PAGE_64_H
1965aae3 PA	2	#define _ASM_X86_PAGE_64_H
1da177e4	3
11b7c7dc JF	4	#define PAGETABLE_LEVELS 4
	5
	6	#define THREAD_ORDER 1
	7	#define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER)
b20a4615	8	#define CURRENT_MASK (~(THREAD_SIZE - 1))
11b7c7dc JF	9
	10	#define EXCEPTION_STACK_ORDER 0
	11	#define EXCEPTION_STKSZ (PAGE_SIZE << EXCEPTION_STACK_ORDER)
	12
	13	#define DEBUG_STACK_ORDER (EXCEPTION_STACK_ORDER + 1)
	14	#define DEBUG_STKSZ (PAGE_SIZE << DEBUG_STACK_ORDER)
	15
	16	#define IRQSTACK_ORDER 2
	17	#define IRQSTACKSIZE (PAGE_SIZE << IRQSTACK_ORDER)
	18
	19	#define STACKFAULT_STACK 1
	20	#define DOUBLEFAULT_STACK 2
	21	#define NMI_STACK 3
	22	#define DEBUG_STACK 4
	23	#define MCE_STACK 5
	24	#define N_EXCEPTION_STACKS 5 /* hw limit: 7 */
	25
fbff3c21 AK	26	#define PUD_PAGE_SIZE (_AC(1, UL) << PUD_SHIFT)
	27	#define PUD_PAGE_MASK (~(PUD_PAGE_SIZE-1))
	28
a6523748 EH	29	/*
	30	* Set __PAGE_OFFSET to the most negative possible address +
	31	* PGDIR_SIZE*16 (pgd slot 272). The gap is to allow a space for a
	32	* hypervisor to fit. Choosing 16 slots here is arbitrary, but it's
	33	* what Xen requires.
	34	*/
	35	#define __PAGE_OFFSET _AC(0xffff880000000000, UL)
11b7c7dc JF	36
	37	#define __PHYSICAL_START CONFIG_PHYSICAL_START
	38	#define __KERNEL_ALIGN 0x200000
1da177e4	39
11b7c7dc JF	40	/*
	41	* Make sure kernel is aligned to 2MB address. Catching it at compile
	42	* time is better. Change your config file and compile the kernel
	43	* for a 2MB aligned address (CONFIG_PHYSICAL_START)
	44	*/
	45	#if (CONFIG_PHYSICAL_START % __KERNEL_ALIGN) != 0
	46	#error "CONFIG_PHYSICAL_START must be a multiple of 2MB"
	47	#endif
	48
	49	#define __START_KERNEL (__START_KERNEL_map + __PHYSICAL_START)
	50	#define __START_KERNEL_map _AC(0xffffffff80000000, UL)
	51
	52	/* See Documentation/x86_64/mm.txt for a description of the memory map. */
	53	#define __PHYSICAL_MASK_SHIFT 46
	54	#define __VIRTUAL_MASK_SHIFT 48
	55
88f3aec7	56	/*
85eb69a1	57	* Kernel image size is limited to 512 MB (see level2_kernel_pgt in
88f3aec7 IM	58	* arch/x86/kernel/head_64.S), and it is mapped here:
88f3aec7 IM	59	*/
b20a4615	60	#define KERNEL_IMAGE_SIZE (512 * 1024 * 1024)
d4afe414	61	#define KERNEL_IMAGE_START _AC(0xffffffff80000000, UL)
1da177e4	62
1da177e4	63	#ifndef __ASSEMBLY__
11b7c7dc JF	64	void clear_page(void *page);
	65	void copy_page(void to, void from);
	66
c987d12f YL	67	/* duplicated to the one in bootmem.h */
c987d12f YL	68	extern unsigned long max_pfn;
11b7c7dc JF	69	extern unsigned long phys_base;
	70
	71	extern unsigned long __phys_addr(unsigned long);
	72	#define __phys_reloc_hide(x) (x)
	73
	74	/*
	75	* These are used to make use of C type-checking..
	76	*/
	77	typedef unsigned long pteval_t;
	78	typedef unsigned long pmdval_t;
	79	typedef unsigned long pudval_t;
	80	typedef unsigned long pgdval_t;
	81	typedef unsigned long pgprotval_t;
11b7c7dc	82
2f569afd MS	83	typedef struct page *pgtable_t;
2f569afd MS	84
11b7c7dc	85	typedef struct { pteval_t pte; } pte_t;
1da177e4	86
11b7c7dc	87	#define vmemmap ((struct page *)VMEMMAP_START)
1da177e4	88
cc615032 AK	89	extern unsigned long init_memory_mapping(unsigned long start,
	90	unsigned long end);
	91
1f75d7e3	92	extern void initmem_init(unsigned long start_pfn, unsigned long end_pfn);
a80495ec	93	extern void free_initmem(void);
3a9e189d JS	94
	95	extern void init_extra_mapping_uc(unsigned long phys, unsigned long size);
	96	extern void init_extra_mapping_wb(unsigned long phys, unsigned long size);
	97
11b7c7dc	98	#endif /* !__ASSEMBLY__ */
cd469e0c	99
83a5101b	100	#ifdef CONFIG_FLATMEM
c987d12f	101	#define pfn_valid(pfn) ((pfn) < max_pfn)
83a5101b JF	102	#endif
	103
	104
1965aae3	105	#endif /* _ASM_X86_PAGE_64_H */