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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _PARISC_PAGE_H
2#define _PARISC_PAGE_H
3
Helge Deller2fd83032006-04-20 20:40:23 +00004#if !defined(__KERNEL__)
5/* this is for userspace applications (4k page size) */
6# define PAGE_SHIFT 12 /* 4k */
7# define PAGE_SIZE (1UL << PAGE_SHIFT)
8# define PAGE_MASK (~(PAGE_SIZE-1))
9#endif
10
Linus Torvalds1da177e2005-04-16 15:20:36 -070011
12#ifdef __KERNEL__
Helge Deller2fd83032006-04-20 20:40:23 +000013
14#if defined(CONFIG_PARISC_PAGE_SIZE_4KB)
15# define PAGE_SHIFT 12 /* 4k */
16#elif defined(CONFIG_PARISC_PAGE_SIZE_16KB)
17# define PAGE_SHIFT 14 /* 16k */
18#elif defined(CONFIG_PARISC_PAGE_SIZE_64KB)
19# define PAGE_SHIFT 16 /* 64k */
20#else
21# error "unknown default kernel page size"
22#endif
23#define PAGE_SIZE (1UL << PAGE_SHIFT)
24#define PAGE_MASK (~(PAGE_SIZE-1))
25
26
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#ifndef __ASSEMBLY__
28
29#include <asm/types.h>
30#include <asm/cache.h>
31
32#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
33#define copy_page(to,from) copy_user_page_asm((void *)(to), (void *)(from))
34
35struct page;
36
37extern void purge_kernel_dcache_page(unsigned long);
38extern void copy_user_page_asm(void *to, void *from);
39extern void clear_user_page_asm(void *page, unsigned long vaddr);
40
41static inline void
42copy_user_page(void *vto, void *vfrom, unsigned long vaddr, struct page *pg)
43{
44 copy_user_page_asm(vto, vfrom);
James Bottomleyba575832006-03-22 09:42:04 -070045 flush_kernel_dcache_page_asm(vto);
Linus Torvalds1da177e2005-04-16 15:20:36 -070046 /* XXX: ppc flushes icache too, should we? */
47}
48
49static inline void
50clear_user_page(void *page, unsigned long vaddr, struct page *pg)
51{
52 purge_kernel_dcache_page((unsigned long)page);
53 clear_user_page_asm(page, vaddr);
54}
55
56/*
57 * These are used to make use of C type-checking..
58 */
Helge Dellerb31059f2006-03-23 15:48:15 -070059#define STRICT_MM_TYPECHECKS
60#ifdef STRICT_MM_TYPECHECKS
61typedef struct { unsigned long pte;
62#if !defined(CONFIG_64BIT)
63 unsigned long future_flags;
64 /* XXX: it's possible to remove future_flags and change BITS_PER_PTE_ENTRY
65 to 2, but then strangely the identical 32bit kernel boots on a
66 c3000(pa20), but not any longer on a 715(pa11).
67 Still investigating... HelgeD.
68 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070069#endif
Helge Dellerb31059f2006-03-23 15:48:15 -070070} pte_t; /* either 32 or 64bit */
71
Linus Torvalds1da177e2005-04-16 15:20:36 -070072/* NOTE: even on 64 bits, these entries are __u32 because we allocate
73 * the pmd and pgd in ZONE_DMA (i.e. under 4GB) */
74typedef struct { __u32 pmd; } pmd_t;
75typedef struct { __u32 pgd; } pgd_t;
76typedef struct { unsigned long pgprot; } pgprot_t;
77
78#define pte_val(x) ((x).pte)
Linus Torvalds1da177e2005-04-16 15:20:36 -070079/* These do not work lvalues, so make sure we don't use them as such. */
80#define pmd_val(x) ((x).pmd + 0)
81#define pgd_val(x) ((x).pgd + 0)
82#define pgprot_val(x) ((x).pgprot)
83
Linus Torvalds1da177e2005-04-16 15:20:36 -070084#define __pte(x) ((pte_t) { (x) } )
85#define __pmd(x) ((pmd_t) { (x) } )
86#define __pgd(x) ((pgd_t) { (x) } )
87#define __pgprot(x) ((pgprot_t) { (x) } )
88
Helge Dellerb31059f2006-03-23 15:48:15 -070089#define __pmd_val_set(x,n) (x).pmd = (n)
90#define __pgd_val_set(x,n) (x).pgd = (n)
91
92#else
93/*
94 * .. while these make it easier on the compiler
95 */
96typedef unsigned long pte_t;
97typedef __u32 pmd_t;
98typedef __u32 pgd_t;
99typedef unsigned long pgprot_t;
100
101#define pte_val(x) (x)
102#define pmd_val(x) (x)
103#define pgd_val(x) (x)
104#define pgprot_val(x) (x)
105
106#define __pte(x) (x)
107#define __pmd(x) (x)
108#define __pgd(x) (x)
109#define __pgprot(x) (x)
110
111#define __pmd_val_set(x,n) (x) = (n)
112#define __pgd_val_set(x,n) (x) = (n)
113
114#endif /* STRICT_MM_TYPECHECKS */
115
116
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117typedef struct __physmem_range {
118 unsigned long start_pfn;
119 unsigned long pages; /* PAGE_SIZE pages */
120} physmem_range_t;
121
122extern physmem_range_t pmem_ranges[];
123extern int npmem_ranges;
124
125#endif /* !__ASSEMBLY__ */
126
127/* WARNING: The definitions below must match exactly to sizeof(pte_t)
128 * etc
129 */
130#ifdef __LP64__
131#define BITS_PER_PTE_ENTRY 3
132#define BITS_PER_PMD_ENTRY 2
133#define BITS_PER_PGD_ENTRY 2
134#else
135#define BITS_PER_PTE_ENTRY 3
136#define BITS_PER_PMD_ENTRY 2
137#define BITS_PER_PGD_ENTRY BITS_PER_PMD_ENTRY
138#endif
139#define PGD_ENTRY_SIZE (1UL << BITS_PER_PGD_ENTRY)
140#define PMD_ENTRY_SIZE (1UL << BITS_PER_PMD_ENTRY)
141#define PTE_ENTRY_SIZE (1UL << BITS_PER_PTE_ENTRY)
142
143/* to align the pointer to the (next) page boundary */
144#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
145
146
147#define LINUX_GATEWAY_SPACE 0
148
149/* This governs the relationship between virtual and physical addresses.
150 * If you alter it, make sure to take care of our various fixed mapping
151 * segments in fixmap.h */
152#define __PAGE_OFFSET (0x10000000)
153
154#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
155
156/* The size of the gateway page (we leave lots of room for expansion) */
157#define GATEWAY_PAGE_SIZE 0x4000
158
159/* The start of the actual kernel binary---used in vmlinux.lds.S
160 * Leave some space after __PAGE_OFFSET for detecting kernel null
161 * ptr derefs */
162#define KERNEL_BINARY_TEXT_START (__PAGE_OFFSET + 0x100000)
163
164/* These macros don't work for 64-bit C code -- don't allow in C at all */
165#ifdef __ASSEMBLY__
166# define PA(x) ((x)-__PAGE_OFFSET)
167# define VA(x) ((x)+__PAGE_OFFSET)
168#endif
169#define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
170#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
171
172#ifndef CONFIG_DISCONTIGMEM
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173#define pfn_valid(pfn) ((pfn) < max_mapnr)
174#endif /* CONFIG_DISCONTIGMEM */
175
Helge Dellere8b736c2006-01-10 20:47:55 -0500176#ifdef CONFIG_HUGETLB_PAGE
177#define HPAGE_SHIFT 22 /* 4MB (is this fixed?) */
178#define HPAGE_SIZE ((1UL) << HPAGE_SHIFT)
179#define HPAGE_MASK (~(HPAGE_SIZE - 1))
180#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
181#endif
182
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
184
185#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
186#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
187
188#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
189 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
190
191#endif /* __KERNEL__ */
192
KAMEZAWA Hiroyuki0d833b42006-03-27 01:15:43 -0800193#include <asm-generic/memory_model.h>
Stephen Rothwellfd4fd5a2005-09-03 15:54:30 -0700194#include <asm-generic/page.h>
195
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196#endif /* _PARISC_PAGE_H */