[linux-2.6-block.git] / include / asm-sparc64 / page.h

/* $Id: page.h,v 1.39 2002/02/09 19:49:31 davem Exp $ */

#ifndef _SPARC64_PAGE_H
#define _SPARC64_PAGE_H

#include <linux/const.h>

#if defined(CONFIG_SPARC64_PAGE_SIZE_8KB)
#define PAGE_SHIFT   13
#elif defined(CONFIG_SPARC64_PAGE_SIZE_64KB)
#define PAGE_SHIFT   16
#elif defined(CONFIG_SPARC64_PAGE_SIZE_512KB)
#define PAGE_SHIFT   19
#elif defined(CONFIG_SPARC64_PAGE_SIZE_4MB)
#define PAGE_SHIFT   22
#else
#error No page size specified in kernel configuration
#endif

#define PAGE_SIZE    (_AC(1,UL) << PAGE_SHIFT)
#define PAGE_MASK    (~(PAGE_SIZE-1))

/* Flushing for D-cache alias handling is only needed if
 * the page size is smaller than 16K.
 */
#if PAGE_SHIFT < 14
#define DCACHE_ALIASING_POSSIBLE
#endif

#if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB)
#define HPAGE_SHIFT		22
#elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K)
#define HPAGE_SHIFT		19
#elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
#define HPAGE_SHIFT		16
#endif

#ifdef CONFIG_HUGETLB_PAGE
#define HPAGE_SIZE		(_AC(1,UL) << HPAGE_SHIFT)
#define HPAGE_MASK		(~(HPAGE_SIZE - 1UL))
#define HUGETLB_PAGE_ORDER	(HPAGE_SHIFT - PAGE_SHIFT)
#define ARCH_HAS_SETCLEAR_HUGE_PTE
#define ARCH_HAS_HUGETLB_PREFAULT_HOOK
#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
#endif

#ifndef __ASSEMBLY__

extern void _clear_page(void *page);
#define clear_page(X)	_clear_page((void *)(X))
struct page;
extern void clear_user_page(void *addr, unsigned long vaddr, struct page *page);
#define copy_page(X,Y)	memcpy((void *)(X), (void *)(Y), PAGE_SIZE)
extern void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage);

/* Unlike sparc32, sparc64's parameter passing API is more
 * sane in that structures which as small enough are passed
 * in registers instead of on the stack.  Thus, setting
 * STRICT_MM_TYPECHECKS does not generate worse code so
 * let's enable it to get the type checking.
 */

#define STRICT_MM_TYPECHECKS

#ifdef STRICT_MM_TYPECHECKS
/* These are used to make use of C type-checking.. */
typedef struct { unsigned long pte; } pte_t;
typedef struct { unsigned long iopte; } iopte_t;
typedef struct { unsigned int pmd; } pmd_t;
typedef struct { unsigned int pgd; } pgd_t;
typedef struct { unsigned long pgprot; } pgprot_t;

#define pte_val(x)	((x).pte)
#define iopte_val(x)	((x).iopte)
#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 __iopte(x)	((iopte_t) { (x) } )
#define __pmd(x)        ((pmd_t) { (x) } )
#define __pgd(x)	((pgd_t) { (x) } )
#define __pgprot(x)	((pgprot_t) { (x) } )

#else
/* .. while these make it easier on the compiler */
typedef unsigned long pte_t;
typedef unsigned long iopte_t;
typedef unsigned int pmd_t;
typedef unsigned int pgd_t;
typedef unsigned long pgprot_t;

#define pte_val(x)	(x)
#define iopte_val(x)	(x)
#define pmd_val(x)      (x)
#define pgd_val(x)	(x)
#define pgprot_val(x)	(x)

#define __pte(x)	(x)
#define __iopte(x)	(x)
#define __pmd(x)        (x)
#define __pgd(x)	(x)
#define __pgprot(x)	(x)

#endif /* (STRICT_MM_TYPECHECKS) */

typedef struct page *pgtable_t;

#define TASK_UNMAPPED_BASE	(test_thread_flag(TIF_32BIT) ? \
				 (_AC(0x0000000070000000,UL)) : \
				 (_AC(0xfffff80000000000,UL) + (1UL << 32UL)))

#include <asm-generic/memory_model.h>

#endif /* !(__ASSEMBLY__) */

/* to align the pointer to the (next) page boundary */
#define PAGE_ALIGN(addr)	(((addr)+PAGE_SIZE-1)&PAGE_MASK)

/* We used to stick this into a hard-coded global register (%g4)
 * but that does not make sense anymore.
 */
#define PAGE_OFFSET		_AC(0xFFFFF80000000000,UL)

#ifndef __ASSEMBLY__

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

#define pfn_to_kaddr(pfn)	__va((pfn) << PAGE_SHIFT)

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

#define virt_addr_valid(kaddr)	pfn_valid(__pa(kaddr) >> PAGE_SHIFT)

#define virt_to_phys __pa
#define phys_to_virt __va

#endif /* !(__ASSEMBLY__) */

#define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \
				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)

#include <asm-generic/page.h>

#endif /* _SPARC64_PAGE_H */
Commit	Line	Data
1da177e4 LT	1	/* $Id: page.h,v 1.39 2002/02/09 19:49:31 davem Exp $ */
	2
	3	#ifndef _SPARC64_PAGE_H
	4	#define _SPARC64_PAGE_H
	5
6df95fd7	6	#include <linux/const.h>
1da177e4 LT	7
	8	#if defined(CONFIG_SPARC64_PAGE_SIZE_8KB)
	9	#define PAGE_SHIFT 13
	10	#elif defined(CONFIG_SPARC64_PAGE_SIZE_64KB)
	11	#define PAGE_SHIFT 16
	12	#elif defined(CONFIG_SPARC64_PAGE_SIZE_512KB)
	13	#define PAGE_SHIFT 19
	14	#elif defined(CONFIG_SPARC64_PAGE_SIZE_4MB)
	15	#define PAGE_SHIFT 22
	16	#else
	17	#error No page size specified in kernel configuration
	18	#endif
	19
	20	#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
	21	#define PAGE_MASK (~(PAGE_SIZE-1))
	22
6a9b490d DM	23	/* Flushing for D-cache alias handling is only needed if
	24	* the page size is smaller than 16K.
	25	*/
	26	#if PAGE_SHIFT < 14
	27	#define DCACHE_ALIASING_POSSIBLE
	28	#endif
	29
dcc1e8dd DM	30	#if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB)
	31	#define HPAGE_SHIFT 22
	32	#elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K)
	33	#define HPAGE_SHIFT 19
	34	#elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
	35	#define HPAGE_SHIFT 16
	36	#endif
	37
	38	#ifdef CONFIG_HUGETLB_PAGE
	39	#define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT)
	40	#define HPAGE_MASK (~(HPAGE_SIZE - 1UL))
	41	#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
	42	#define ARCH_HAS_SETCLEAR_HUGE_PTE
	43	#define ARCH_HAS_HUGETLB_PREFAULT_HOOK
	44	#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
	45	#endif
	46
1da177e4 LT	47	#ifndef __ASSEMBLY__
	48
	49	extern void _clear_page(void *page);
	50	#define clear_page(X) _clear_page((void *)(X))
	51	struct page;
	52	extern void clear_user_page(void addr, unsigned long vaddr, struct page page);
	53	#define copy_page(X,Y) memcpy((void )(X), (void )(Y), PAGE_SIZE)
	54	extern void copy_user_page(void to, void from, unsigned long vaddr, struct page *topage);
	55
	56	/* Unlike sparc32, sparc64's parameter passing API is more
	57	* sane in that structures which as small enough are passed
	58	* in registers instead of on the stack. Thus, setting
	59	* STRICT_MM_TYPECHECKS does not generate worse code so
	60	* let's enable it to get the type checking.
	61	*/
	62
	63	#define STRICT_MM_TYPECHECKS
	64
	65	#ifdef STRICT_MM_TYPECHECKS
	66	/* These are used to make use of C type-checking.. */
	67	typedef struct { unsigned long pte; } pte_t;
	68	typedef struct { unsigned long iopte; } iopte_t;
	69	typedef struct { unsigned int pmd; } pmd_t;
	70	typedef struct { unsigned int pgd; } pgd_t;
	71	typedef struct { unsigned long pgprot; } pgprot_t;
	72
	73	#define pte_val(x) ((x).pte)
	74	#define iopte_val(x) ((x).iopte)
	75	#define pmd_val(x) ((x).pmd)
	76	#define pgd_val(x) ((x).pgd)
	77	#define pgprot_val(x) ((x).pgprot)
	78
	79	#define __pte(x) ((pte_t) { (x) } )
	80	#define __iopte(x) ((iopte_t) { (x) } )
	81	#define __pmd(x) ((pmd_t) { (x) } )
	82	#define __pgd(x) ((pgd_t) { (x) } )
	83	#define __pgprot(x) ((pgprot_t) { (x) } )
	84
	85	#else
	86	/* .. while these make it easier on the compiler */
	87	typedef unsigned long pte_t;
	88	typedef unsigned long iopte_t;
	89	typedef unsigned int pmd_t;
	90	typedef unsigned int pgd_t;
	91	typedef unsigned long pgprot_t;
	92
	93	#define pte_val(x) (x)
	94	#define iopte_val(x) (x)
	95	#define pmd_val(x) (x)
	96	#define pgd_val(x) (x)
	97	#define pgprot_val(x) (x)
	98
	99	#define __pte(x) (x)
	100	#define __iopte(x) (x)
	101	#define __pmd(x) (x)
	102	#define __pgd(x) (x)
	103	#define __pgprot(x) (x)
	104
	105	#endif /* (STRICT_MM_TYPECHECKS) */
	106
2f569afd MS	107	typedef struct page *pgtable_t;
2f569afd MS	108
1da177e4	109	#define TASK_UNMAPPED_BASE (test_thread_flag(TIF_32BIT) ? \
8bcd1741 DM	110	(_AC(0x0000000070000000,UL)) : \
8bcd1741 DM	111	(_AC(0xfffff80000000000,UL) + (1UL << 32UL)))
1da177e4	112
a117e66e KH	113	#include <asm-generic/memory_model.h>
a117e66e KH	114
1da177e4 LT	115	#endif /* !(__ASSEMBLY__) */
	116
	117	/* to align the pointer to the (next) page boundary */
	118	#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
	119
	120	/* We used to stick this into a hard-coded global register (%g4)
	121	* but that does not make sense anymore.
	122	*/
	123	#define PAGE_OFFSET _AC(0xFFFFF80000000000,UL)
	124
	125	#ifndef __ASSEMBLY__
	126
	127	#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET)
	128	#define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET))
	129
d1112018	130	#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
1da177e4 LT	131
	132	#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr)>>PAGE_SHIFT)
	133
1da177e4 LT	134	#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
	135
	136	#define virt_to_phys __pa
	137	#define phys_to_virt __va
	138
1da177e4 LT	139	#endif /* !(__ASSEMBLY__) */
	140
	141	#define VM_DATA_DEFAULT_FLAGS (VM_READ \| VM_WRITE \| VM_EXEC \| \
	142	VM_MAYREAD \| VM_MAYWRITE \| VM_MAYEXEC)
	143
fd4fd5aa SR	144	#include <asm-generic/page.h>
fd4fd5aa SR	145
09087a1a	146	#endif /* _SPARC64_PAGE_H */