1#ifndef _ASM_POWERPC_PAGE_H
2#define _ASM_POWERPC_PAGE_H
3
4
5
6
7
8
9
10
11
12
13#ifndef __ASSEMBLY__
14#include <linux/types.h>
15#else
16#include <asm/types.h>
17#endif
18#include <asm/asm-compat.h>
19#include <asm/kdump.h>
20
21
22
23
24
25
26
27#if defined(CONFIG_PPC_256K_PAGES)
28#define PAGE_SHIFT 18
29#elif defined(CONFIG_PPC_64K_PAGES)
30#define PAGE_SHIFT 16
31#elif defined(CONFIG_PPC_16K_PAGES)
32#define PAGE_SHIFT 14
33#else
34#define PAGE_SHIFT 12
35#endif
36
37#define PAGE_SIZE (ASM_CONST(1) << PAGE_SHIFT)
38
39
40#define __HAVE_ARCH_GATE_AREA 1
41
42
43
44
45
46
47#define PAGE_MASK (~((1 << PAGE_SHIFT) - 1))
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79#define KERNELBASE ASM_CONST(CONFIG_KERNEL_START)
80#define PAGE_OFFSET ASM_CONST(CONFIG_PAGE_OFFSET)
81#define LOAD_OFFSET ASM_CONST((CONFIG_KERNEL_START-CONFIG_PHYSICAL_START))
82
83#if defined(CONFIG_RELOCATABLE)
84#ifndef __ASSEMBLY__
85
86extern phys_addr_t memstart_addr;
87extern phys_addr_t kernstart_addr;
88#endif
89#define PHYSICAL_START kernstart_addr
90#else
91#define PHYSICAL_START ASM_CONST(CONFIG_PHYSICAL_START)
92#endif
93
94#ifdef CONFIG_PPC64
95#define MEMORY_START 0UL
96#elif defined(CONFIG_RELOCATABLE)
97#define MEMORY_START memstart_addr
98#else
99#define MEMORY_START (PHYSICAL_START + PAGE_OFFSET - KERNELBASE)
100#endif
101
102#ifdef CONFIG_FLATMEM
103#define ARCH_PFN_OFFSET (MEMORY_START >> PAGE_SHIFT)
104#define pfn_valid(pfn) ((pfn) >= ARCH_PFN_OFFSET && (pfn) < max_mapnr)
105#endif
106
107#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
108#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
109#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
110
111
112
113
114
115
116
117
118
119#ifdef CONFIG_BOOKE
120#define __va(x) ((void *)(unsigned long)((phys_addr_t)(x) - PHYSICAL_START + KERNELBASE))
121#define __pa(x) ((unsigned long)(x) + PHYSICAL_START - KERNELBASE)
122#else
123#define __va(x) ((void *)(unsigned long)((phys_addr_t)(x) + PAGE_OFFSET - MEMORY_START))
124#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET + MEMORY_START)
125#endif
126
127
128
129
130
131
132#define VM_DATA_DEFAULT_FLAGS32 (VM_READ | VM_WRITE | VM_EXEC | \
133 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
134
135#define VM_DATA_DEFAULT_FLAGS64 (VM_READ | VM_WRITE | \
136 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
137
138#ifdef __powerpc64__
139#include <asm/page_64.h>
140#else
141#include <asm/page_32.h>
142#endif
143
144
145#define _ALIGN_UP(addr,size) (((addr)+((size)-1))&(~((size)-1)))
146#define _ALIGN_DOWN(addr,size) ((addr)&(~((size)-1)))
147
148
149#define _ALIGN(addr,size) _ALIGN_UP(addr,size)
150
151
152
153
154
155#ifdef CONFIG_PPC_BOOK3E_64
156#define is_kernel_addr(x) ((x) >= 0x8000000000000000ul)
157#else
158#define is_kernel_addr(x) ((x) >= PAGE_OFFSET)
159#endif
160
161#ifndef __ASSEMBLY__
162
163#undef STRICT_MM_TYPECHECKS
164
165#ifdef STRICT_MM_TYPECHECKS
166
167
168
169typedef struct { pte_basic_t pte; } pte_t;
170#define pte_val(x) ((x).pte)
171#define __pte(x) ((pte_t) { (x) })
172
173
174
175
176#if defined(CONFIG_PPC_64K_PAGES) && defined(CONFIG_PPC_STD_MMU_64)
177typedef struct { pte_t pte; unsigned long hidx; } real_pte_t;
178#else
179typedef struct { pte_t pte; } real_pte_t;
180#endif
181
182
183#ifdef CONFIG_PPC64
184typedef struct { unsigned long pmd; } pmd_t;
185#define pmd_val(x) ((x).pmd)
186#define __pmd(x) ((pmd_t) { (x) })
187
188
189#ifndef CONFIG_PPC_64K_PAGES
190typedef struct { unsigned long pud; } pud_t;
191#define pud_val(x) ((x).pud)
192#define __pud(x) ((pud_t) { (x) })
193#endif
194#endif
195
196
197typedef struct { unsigned long pgd; } pgd_t;
198#define pgd_val(x) ((x).pgd)
199#define __pgd(x) ((pgd_t) { (x) })
200
201
202typedef struct { unsigned long pgprot; } pgprot_t;
203#define pgprot_val(x) ((x).pgprot)
204#define __pgprot(x) ((pgprot_t) { (x) })
205
206#else
207
208
209
210
211
212typedef pte_basic_t pte_t;
213#define pte_val(x) (x)
214#define __pte(x) (x)
215
216#if defined(CONFIG_PPC_64K_PAGES) && defined(CONFIG_PPC_STD_MMU_64)
217typedef struct { pte_t pte; unsigned long hidx; } real_pte_t;
218#else
219typedef pte_t real_pte_t;
220#endif
221
222
223#ifdef CONFIG_PPC64
224typedef unsigned long pmd_t;
225#define pmd_val(x) (x)
226#define __pmd(x) (x)
227
228#ifndef CONFIG_PPC_64K_PAGES
229typedef unsigned long pud_t;
230#define pud_val(x) (x)
231#define __pud(x) (x)
232#endif
233#endif
234
235typedef unsigned long pgd_t;
236#define pgd_val(x) (x)
237#define pgprot_val(x) (x)
238
239typedef unsigned long pgprot_t;
240#define __pgd(x) (x)
241#define __pgprot(x) (x)
242
243#endif
244
245typedef struct { signed long pd; } hugepd_t;
246#define HUGEPD_SHIFT_MASK 0x3f
247
248#ifdef CONFIG_HUGETLB_PAGE
249static inline int hugepd_ok(hugepd_t hpd)
250{
251 return (hpd.pd > 0);
252}
253
254#define is_hugepd(pdep) (hugepd_ok(*((hugepd_t *)(pdep))))
255#else
256#define is_hugepd(pdep) 0
257#endif
258
259struct page;
260extern void clear_user_page(void *page, unsigned long vaddr, struct page *pg);
261extern void copy_user_page(void *to, void *from, unsigned long vaddr,
262 struct page *p);
263extern int page_is_ram(unsigned long pfn);
264
265#ifdef CONFIG_PPC_SMLPAR
266void arch_free_page(struct page *page, int order);
267#define HAVE_ARCH_FREE_PAGE
268#endif
269
270struct vm_area_struct;
271
272typedef struct page *pgtable_t;
273
274#include <asm-generic/memory_model.h>
275#endif
276
277#endif
278