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

/* $Id: page.h,v 1.55 2000/10/30 21:01:41 davem Exp $
 * page.h:  Various defines and such for MMU operations on the Sparc for
 *          the Linux kernel.
 *
 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
 */

#ifndef _SPARC_PAGE_H
#define _SPARC_PAGE_H

#ifdef __KERNEL__

#ifdef CONFIG_SUN4
#define PAGE_SHIFT   13
#else
#define PAGE_SHIFT   12
#endif
#ifndef __ASSEMBLY__
/* I have my suspicions... -DaveM */
#define PAGE_SIZE    (1UL << PAGE_SHIFT)
#else
#define PAGE_SIZE    (1 << PAGE_SHIFT)
#endif
#define PAGE_MASK    (~(PAGE_SIZE-1))

#include <asm/btfixup.h>

#ifndef __ASSEMBLY__

#define clear_page(page)	 memset((void *)(page), 0, PAGE_SIZE)
#define copy_page(to,from) 	memcpy((void *)(to), (void *)(from), PAGE_SIZE)
#define clear_user_page(addr, vaddr, page)	\
	do { 	clear_page(addr);		\
		sparc_flush_page_to_ram(page);	\
	} while (0)
#define copy_user_page(to, from, vaddr, page)	\
	do {	copy_page(to, from);		\
		sparc_flush_page_to_ram(page);	\
	} while (0)

/* The following structure is used to hold the physical
 * memory configuration of the machine.  This is filled in
 * probe_memory() and is later used by mem_init() to set up
 * mem_map[].  We statically allocate SPARC_PHYS_BANKS of
 * these structs, this is arbitrary.  The entry after the
 * last valid one has num_bytes==0.
 */

struct sparc_phys_banks {
  unsigned long base_addr;
  unsigned long num_bytes;
};

#define SPARC_PHYS_BANKS 32

extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS+1];

/* Cache alias structure.  Entry is valid if context != -1. */
struct cache_palias {
	unsigned long vaddr;
	int context;
};

extern struct cache_palias *sparc_aliases;

/* passing structs on the Sparc slow us down tremendously... */

/* #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 long pmdv[16]; } pmd_t;
typedef struct { unsigned long pgd; } pgd_t;
typedef struct { unsigned long ctxd; } ctxd_t;
typedef struct { unsigned long pgprot; } pgprot_t;
typedef struct { unsigned long iopgprot; } iopgprot_t;

#define pte_val(x)	((x).pte)
#define iopte_val(x)	((x).iopte)
#define pmd_val(x)      ((x).pmdv[0])
#define pgd_val(x)	((x).pgd)
#define ctxd_val(x)	((x).ctxd)
#define pgprot_val(x)	((x).pgprot)
#define iopgprot_val(x)	((x).iopgprot)

#define __pte(x)	((pte_t) { (x) } )
#define __iopte(x)	((iopte_t) { (x) } )
/* #define __pmd(x)        ((pmd_t) { (x) } ) */ /* XXX procedure with loop */
#define __pgd(x)	((pgd_t) { (x) } )
#define __ctxd(x)	((ctxd_t) { (x) } )
#define __pgprot(x)	((pgprot_t) { (x) } )
#define __iopgprot(x)	((iopgprot_t) { (x) } )

#else
/*
 * .. while these make it easier on the compiler
 */
typedef unsigned long pte_t;
typedef unsigned long iopte_t;
typedef struct { unsigned long pmdv[16]; } pmd_t;
typedef unsigned long pgd_t;
typedef unsigned long ctxd_t;
typedef unsigned long pgprot_t;
typedef unsigned long iopgprot_t;

#define pte_val(x)	(x)
#define iopte_val(x)	(x)
#define pmd_val(x)      ((x).pmdv[0])
#define pgd_val(x)	(x)
#define ctxd_val(x)	(x)
#define pgprot_val(x)	(x)
#define iopgprot_val(x)	(x)

#define __pte(x)	(x)
#define __iopte(x)	(x)
/* #define __pmd(x)        (x) */ /* XXX later */
#define __pgd(x)	(x)
#define __ctxd(x)	(x)
#define __pgprot(x)	(x)
#define __iopgprot(x)	(x)

#endif

extern unsigned long sparc_unmapped_base;

BTFIXUPDEF_SETHI(sparc_unmapped_base)

#define TASK_UNMAPPED_BASE	BTFIXUP_SETHI(sparc_unmapped_base)

#else /* !(__ASSEMBLY__) */

#define __pgprot(x)	(x)

#endif /* !(__ASSEMBLY__) */

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

#define PAGE_OFFSET	0xf0000000
#ifndef __ASSEMBLY__
extern unsigned long phys_base;
extern unsigned long pfn_base;
#endif
#define __pa(x)			((unsigned long)(x) - PAGE_OFFSET + phys_base)
#define __va(x)			((void *)((unsigned long) (x) - phys_base + PAGE_OFFSET))

#define virt_to_phys		__pa
#define phys_to_virt		__va

#define ARCH_PFN_OFFSET		(pfn_base)
#define virt_to_page(kaddr)	(mem_map + ((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT)))

#define pfn_valid(pfn)		(((pfn) >= (pfn_base)) && (((pfn)-(pfn_base)) < max_mapnr))
#define virt_addr_valid(kaddr)	((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT) < max_mapnr)

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

#include <asm-generic/memory_model.h>
#include <asm-generic/page.h>

#endif /* __KERNEL__ */

#endif /* _SPARC_PAGE_H */
Commit	Line	Data
1da177e4 LT	1	/* $Id: page.h,v 1.55 2000/10/30 21:01:41 davem Exp $
	2	* page.h: Various defines and such for MMU operations on the Sparc for
	3	* the Linux kernel.
	4	*
	5	* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
	6	*/
	7
	8	#ifndef _SPARC_PAGE_H
	9	#define _SPARC_PAGE_H
	10
09087a1a DW	11	#ifdef __KERNEL__
09087a1a DW	12
1da177e4 LT	13	#ifdef CONFIG_SUN4
	14	#define PAGE_SHIFT 13
	15	#else
	16	#define PAGE_SHIFT 12
	17	#endif
	18	#ifndef __ASSEMBLY__
	19	/* I have my suspicions... -DaveM */
	20	#define PAGE_SIZE (1UL << PAGE_SHIFT)
	21	#else
	22	#define PAGE_SIZE (1 << PAGE_SHIFT)
	23	#endif
	24	#define PAGE_MASK (~(PAGE_SIZE-1))
	25
1da177e4 LT	26	#include <asm/btfixup.h>
	27
	28	#ifndef __ASSEMBLY__
	29
	30	#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
	31	#define copy_page(to,from) memcpy((void )(to), (void )(from), PAGE_SIZE)
	32	#define clear_user_page(addr, vaddr, page) \
	33	do { clear_page(addr); \
	34	sparc_flush_page_to_ram(page); \
	35	} while (0)
	36	#define copy_user_page(to, from, vaddr, page) \
	37	do { copy_page(to, from); \
	38	sparc_flush_page_to_ram(page); \
	39	} while (0)
	40
	41	/* The following structure is used to hold the physical
	42	* memory configuration of the machine. This is filled in
	43	* probe_memory() and is later used by mem_init() to set up
	44	* mem_map[]. We statically allocate SPARC_PHYS_BANKS of
	45	* these structs, this is arbitrary. The entry after the
	46	* last valid one has num_bytes==0.
	47	*/
	48
	49	struct sparc_phys_banks {
	50	unsigned long base_addr;
	51	unsigned long num_bytes;
	52	};
	53
	54	#define SPARC_PHYS_BANKS 32
	55
	56	extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS+1];
	57
	58	/* Cache alias structure. Entry is valid if context != -1. */
	59	struct cache_palias {
	60	unsigned long vaddr;
	61	int context;
	62	};
	63
	64	extern struct cache_palias *sparc_aliases;
	65
	66	/* passing structs on the Sparc slow us down tremendously... */
	67
	68	/* #define STRICT_MM_TYPECHECKS */
	69
	70	#ifdef STRICT_MM_TYPECHECKS
	71	/*
	72	* These are used to make use of C type-checking..
	73	*/
	74	typedef struct { unsigned long pte; } pte_t;
	75	typedef struct { unsigned long iopte; } iopte_t;
	76	typedef struct { unsigned long pmdv[16]; } pmd_t;
	77	typedef struct { unsigned long pgd; } pgd_t;
	78	typedef struct { unsigned long ctxd; } ctxd_t;
	79	typedef struct { unsigned long pgprot; } pgprot_t;
	80	typedef struct { unsigned long iopgprot; } iopgprot_t;
	81
	82	#define pte_val(x) ((x).pte)
	83	#define iopte_val(x) ((x).iopte)
	84	#define pmd_val(x) ((x).pmdv[0])
	85	#define pgd_val(x) ((x).pgd)
	86	#define ctxd_val(x) ((x).ctxd)
	87	#define pgprot_val(x) ((x).pgprot)
	88	#define iopgprot_val(x) ((x).iopgprot)
	89
90	#define __pte(x) ((pte_t) { (x) } )
91	#define __iopte(x) ((iopte_t) { (x) } )
92	/* #define __pmd(x) ((pmd_t) { (x) } ) / / XXX procedure with loop */
93	#define __pgd(x) ((pgd_t) { (x) } )
94	#define __ctxd(x) ((ctxd_t) { (x) } )
95	#define __pgprot(x) ((pgprot_t) { (x) } )
96	#define __iopgprot(x) ((iopgprot_t) { (x) } )
97
98	#else
99	/*
100	* .. while these make it easier on the compiler
101	*/
102	typedef unsigned long pte_t;
103	typedef unsigned long iopte_t;
104	typedef struct { unsigned long pmdv[16]; } pmd_t;
105	typedef unsigned long pgd_t;
106	typedef unsigned long ctxd_t;
107	typedef unsigned long pgprot_t;
108	typedef unsigned long iopgprot_t;
109
110	#define pte_val(x) (x)
111	#define iopte_val(x) (x)
112	#define pmd_val(x) ((x).pmdv[0])
113	#define pgd_val(x) (x)
114	#define ctxd_val(x) (x)
115	#define pgprot_val(x) (x)
116	#define iopgprot_val(x) (x)
117
118	#define __pte(x) (x)
119	#define __iopte(x) (x)
120	/* #define __pmd(x) (x) / / XXX later */
121	#define __pgd(x) (x)
122	#define __ctxd(x) (x)
123	#define __pgprot(x) (x)
124	#define __iopgprot(x) (x)
125
126	#endif
127
128	extern unsigned long sparc_unmapped_base;
129
130	BTFIXUPDEF_SETHI(sparc_unmapped_base)
131
132	#define TASK_UNMAPPED_BASE BTFIXUP_SETHI(sparc_unmapped_base)
133
1da177e4 LT	134	#else /* !(__ASSEMBLY__) */
	135
	136	#define __pgprot(x) (x)
	137
	138	#endif /* !(__ASSEMBLY__) */
	139
	140	/* to align the pointer to the (next) page boundary */
	141	#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
	142
	143	#define PAGE_OFFSET 0xf0000000
	144	#ifndef __ASSEMBLY__
	145	extern unsigned long phys_base;
	146	extern unsigned long pfn_base;
	147	#endif
	148	#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET + phys_base)
	149	#define __va(x) ((void *)((unsigned long) (x) - phys_base + PAGE_OFFSET))
	150
	151	#define virt_to_phys __pa
	152	#define phys_to_virt __va
	153
064b2a07	154	#define ARCH_PFN_OFFSET (pfn_base)
1da177e4 LT	155	#define virt_to_page(kaddr) (mem_map + ((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT)))
	156
	157	#define pfn_valid(pfn) (((pfn) >= (pfn_base)) && (((pfn)-(pfn_base)) < max_mapnr))
	158	#define virt_addr_valid(kaddr) ((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT) < max_mapnr)
	159
	160	#define VM_DATA_DEFAULT_FLAGS (VM_READ \| VM_WRITE \| VM_EXEC \| \
	161	VM_MAYREAD \| VM_MAYWRITE \| VM_MAYEXEC)
	162
064b2a07	163	#include <asm-generic/memory_model.h>
fd4fd5aa SR	164	#include <asm-generic/page.h>
fd4fd5aa SR	165
09087a1a DW	166	#endif /* __KERNEL__ */
09087a1a DW	167
1da177e4	168	#endif /* _SPARC_PAGE_H */