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

#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
#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 HAVE_ARCH_HUGETLB_UNMAPPED_AREA
#endif

#ifndef __ASSEMBLY__

#define WANT_PAGE_VIRTUAL

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__) */

/* 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/getorder.h>

#endif /* _SPARC64_PAGE_H */
Commit	Line	Data
f5e706ad SR	1	#ifndef _SPARC64_PAGE_H
	2	#define _SPARC64_PAGE_H
	3
	4	#include <linux/const.h>
	5
	6	#if defined(CONFIG_SPARC64_PAGE_SIZE_8KB)
	7	#define PAGE_SHIFT 13
	8	#elif defined(CONFIG_SPARC64_PAGE_SIZE_64KB)
	9	#define PAGE_SHIFT 16
f5e706ad SR	10	#else
	11	#error No page size specified in kernel configuration
	12	#endif
	13
	14	#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
	15	#define PAGE_MASK (~(PAGE_SIZE-1))
	16
	17	/* Flushing for D-cache alias handling is only needed if
	18	* the page size is smaller than 16K.
	19	*/
	20	#if PAGE_SHIFT < 14
	21	#define DCACHE_ALIASING_POSSIBLE
	22	#endif
	23
	24	#if defined(CONFIG_HUGETLB_PAGE_SIZE_4MB)
	25	#define HPAGE_SHIFT 22
	26	#elif defined(CONFIG_HUGETLB_PAGE_SIZE_512K)
	27	#define HPAGE_SHIFT 19
	28	#elif defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
	29	#define HPAGE_SHIFT 16
	30	#endif
	31
	32	#ifdef CONFIG_HUGETLB_PAGE
	33	#define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT)
	34	#define HPAGE_MASK (~(HPAGE_SIZE - 1UL))
	35	#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
	36	#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
	37	#endif
	38
	39	#ifndef __ASSEMBLY__
	40
b0f1e796 DM	41	#define WANT_PAGE_VIRTUAL
b0f1e796 DM	42
f5e706ad SR	43	extern void _clear_page(void *page);
	44	#define clear_page(X) _clear_page((void *)(X))
	45	struct page;
	46	extern void clear_user_page(void addr, unsigned long vaddr, struct page page);
	47	#define copy_page(X,Y) memcpy((void )(X), (void )(Y), PAGE_SIZE)
	48	extern void copy_user_page(void to, void from, unsigned long vaddr, struct page *topage);
	49
	50	/* Unlike sparc32, sparc64's parameter passing API is more
	51	* sane in that structures which as small enough are passed
	52	* in registers instead of on the stack. Thus, setting
	53	* STRICT_MM_TYPECHECKS does not generate worse code so
	54	* let's enable it to get the type checking.
	55	*/
	56
	57	#define STRICT_MM_TYPECHECKS
	58
	59	#ifdef STRICT_MM_TYPECHECKS
	60	/* These are used to make use of C type-checking.. */
	61	typedef struct { unsigned long pte; } pte_t;
	62	typedef struct { unsigned long iopte; } iopte_t;
	63	typedef struct { unsigned int pmd; } pmd_t;
	64	typedef struct { unsigned int pgd; } pgd_t;
	65	typedef struct { unsigned long pgprot; } pgprot_t;
	66
	67	#define pte_val(x) ((x).pte)
	68	#define iopte_val(x) ((x).iopte)
	69	#define pmd_val(x) ((x).pmd)
	70	#define pgd_val(x) ((x).pgd)
	71	#define pgprot_val(x) ((x).pgprot)
	72
	73	#define __pte(x) ((pte_t) { (x) } )
	74	#define __iopte(x) ((iopte_t) { (x) } )
	75	#define __pmd(x) ((pmd_t) { (x) } )
	76	#define __pgd(x) ((pgd_t) { (x) } )
	77	#define __pgprot(x) ((pgprot_t) { (x) } )
	78
	79	#else
	80	/* .. while these make it easier on the compiler */
	81	typedef unsigned long pte_t;
	82	typedef unsigned long iopte_t;
	83	typedef unsigned int pmd_t;
	84	typedef unsigned int pgd_t;
	85	typedef unsigned long pgprot_t;
	86
	87	#define pte_val(x) (x)
	88	#define iopte_val(x) (x)
	89	#define pmd_val(x) (x)
	90	#define pgd_val(x) (x)
	91	#define pgprot_val(x) (x)
	92
	93	#define __pte(x) (x)
	94	#define __iopte(x) (x)
	95	#define __pmd(x) (x)
	96	#define __pgd(x) (x)
	97	#define __pgprot(x) (x)
	98
	99	#endif /* (STRICT_MM_TYPECHECKS) */
	100
	101	typedef struct page *pgtable_t;
	102
	103	#define TASK_UNMAPPED_BASE (test_thread_flag(TIF_32BIT) ? \
	104	(_AC(0x0000000070000000,UL)) : \
	105	(_AC(0xfffff80000000000,UL) + (1UL << 32UL)))
	106
107	#include <asm-generic/memory_model.h>
108
109	#endif /* !(__ASSEMBLY__) */
110
f5e706ad SR	111	/* We used to stick this into a hard-coded global register (%g4)
	112	* but that does not make sense anymore.
	113	*/
	114	#define PAGE_OFFSET _AC(0xFFFFF80000000000,UL)
	115
	116	#ifndef __ASSEMBLY__
	117
	118	#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET)
	119	#define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET))
	120
	121	#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
	122
	123	#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr)>>PAGE_SHIFT)
	124
	125	#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
	126
	127	#define virt_to_phys __pa
	128	#define phys_to_virt __va
	129
	130	#endif /* !(__ASSEMBLY__) */
	131
	132	#define VM_DATA_DEFAULT_FLAGS (VM_READ \| VM_WRITE \| VM_EXEC \| \
	133	VM_MAYREAD \| VM_MAYWRITE \| VM_MAYEXEC)
	134
5b17e1cd	135	#include <asm-generic/getorder.h>
f5e706ad SR	136
f5e706ad SR	137	#endif /* _SPARC64_PAGE_H */