1#ifndef _ASM_IA64_PAGE_H
2#define _ASM_IA64_PAGE_H
3
4
5
6
7
8
9
10#include <asm/intrinsics.h>
11#include <asm/types.h>
12
13
14
15
16
17#define RGN_SHIFT (61)
18#define RGN_BASE(r) (__IA64_UL_CONST(r)<<RGN_SHIFT)
19#define RGN_BITS (RGN_BASE(-1))
20
21#define RGN_KERNEL 7
22#define RGN_UNCACHED 6
23#define RGN_GATE 5
24#define RGN_HPAGE 4
25
26
27
28
29#if defined(CONFIG_IA64_PAGE_SIZE_4KB)
30# define PAGE_SHIFT 12
31#elif defined(CONFIG_IA64_PAGE_SIZE_8KB)
32# define PAGE_SHIFT 13
33#elif defined(CONFIG_IA64_PAGE_SIZE_16KB)
34# define PAGE_SHIFT 14
35#elif defined(CONFIG_IA64_PAGE_SIZE_64KB)
36# define PAGE_SHIFT 16
37#else
38# error Unsupported page size!
39#endif
40
41#define PAGE_SIZE (__IA64_UL_CONST(1) << PAGE_SHIFT)
42#define PAGE_MASK (~(PAGE_SIZE - 1))
43
44#define PERCPU_PAGE_SHIFT 18
45#define PERCPU_PAGE_SIZE (__IA64_UL_CONST(1) << PERCPU_PAGE_SHIFT)
46
47
48#ifdef CONFIG_HUGETLB_PAGE
49# define HPAGE_REGION_BASE RGN_BASE(RGN_HPAGE)
50# define HPAGE_SHIFT hpage_shift
51# define HPAGE_SHIFT_DEFAULT 28
52# define HPAGE_SIZE (__IA64_UL_CONST(1) << HPAGE_SHIFT)
53# define HPAGE_MASK (~(HPAGE_SIZE - 1))
54
55# define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
56#endif
57
58#ifdef __ASSEMBLY__
59# define __pa(x) ((x) - PAGE_OFFSET)
60# define __va(x) ((x) + PAGE_OFFSET)
61#else
62# define STRICT_MM_TYPECHECKS
63
64extern void clear_page (void *page);
65extern void copy_page (void *to, void *from);
66
67
68
69
70
71#define clear_user_page(addr, vaddr, page) \
72do { \
73 clear_page(addr); \
74 flush_dcache_page(page); \
75} while (0)
76
77#define copy_user_page(to, from, vaddr, page) \
78do { \
79 copy_page((to), (from)); \
80 flush_dcache_page(page); \
81} while (0)
82
83
84#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
85({ \
86 struct page *page = alloc_page_vma( \
87 GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr); \
88 if (page) \
89 flush_dcache_page(page); \
90 page; \
91})
92
93#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
94
95#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
96
97#ifdef CONFIG_VIRTUAL_MEM_MAP
98extern int ia64_pfn_valid (unsigned long pfn);
99#else
100# define ia64_pfn_valid(pfn) 1
101#endif
102
103#ifdef CONFIG_VIRTUAL_MEM_MAP
104extern struct page *vmem_map;
105#ifdef CONFIG_DISCONTIGMEM
106# define page_to_pfn(page) ((unsigned long) (page - vmem_map))
107# define pfn_to_page(pfn) (vmem_map + (pfn))
108# define __pfn_to_phys(pfn) PFN_PHYS(pfn)
109#else
110# include <asm-generic/memory_model.h>
111#endif
112#else
113# include <asm-generic/memory_model.h>
114#endif
115
116#ifdef CONFIG_FLATMEM
117# define pfn_valid(pfn) (((pfn) < max_mapnr) && ia64_pfn_valid(pfn))
118#elif defined(CONFIG_DISCONTIGMEM)
119extern unsigned long min_low_pfn;
120extern unsigned long max_low_pfn;
121# define pfn_valid(pfn) (((pfn) >= min_low_pfn) && ((pfn) < max_low_pfn) && ia64_pfn_valid(pfn))
122#endif
123
124#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
125#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
126#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
127
128typedef union ia64_va {
129 struct {
130 unsigned long off : 61;
131 unsigned long reg : 3;
132 } f;
133 unsigned long l;
134 void *p;
135} ia64_va;
136
137
138
139
140
141
142
143#define __pa(x) ({ia64_va _v; _v.l = (long) (x); _v.f.reg = 0; _v.l;})
144#define __va(x) ({ia64_va _v; _v.l = (long) (x); _v.f.reg = -1; _v.p;})
145
146#define REGION_NUMBER(x) ({ia64_va _v; _v.l = (long) (x); _v.f.reg;})
147#define REGION_OFFSET(x) ({ia64_va _v; _v.l = (long) (x); _v.f.off;})
148
149#ifdef CONFIG_HUGETLB_PAGE
150# define htlbpage_to_page(x) (((unsigned long) REGION_NUMBER(x) << 61) \
151 | (REGION_OFFSET(x) >> (HPAGE_SHIFT-PAGE_SHIFT)))
152# define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
153extern unsigned int hpage_shift;
154#endif
155
156static __inline__ int
157get_order (unsigned long size)
158{
159 long double d = size - 1;
160 long order;
161
162 order = ia64_getf_exp(d);
163 order = order - PAGE_SHIFT - 0xffff + 1;
164 if (order < 0)
165 order = 0;
166 return order;
167}
168
169#endif
170
171#ifdef STRICT_MM_TYPECHECKS
172
173
174
175 typedef struct { unsigned long pte; } pte_t;
176 typedef struct { unsigned long pmd; } pmd_t;
177#if CONFIG_PGTABLE_LEVELS == 4
178 typedef struct { unsigned long pud; } pud_t;
179#endif
180 typedef struct { unsigned long pgd; } pgd_t;
181 typedef struct { unsigned long pgprot; } pgprot_t;
182 typedef struct page *pgtable_t;
183
184# define pte_val(x) ((x).pte)
185# define pmd_val(x) ((x).pmd)
186#if CONFIG_PGTABLE_LEVELS == 4
187# define pud_val(x) ((x).pud)
188#endif
189# define pgd_val(x) ((x).pgd)
190# define pgprot_val(x) ((x).pgprot)
191
192# define __pte(x) ((pte_t) { (x) } )
193# define __pmd(x) ((pmd_t) { (x) } )
194# define __pgprot(x) ((pgprot_t) { (x) } )
195
196#else
197
198
199
200# ifndef __ASSEMBLY__
201 typedef unsigned long pte_t;
202 typedef unsigned long pmd_t;
203 typedef unsigned long pgd_t;
204 typedef unsigned long pgprot_t;
205 typedef struct page *pgtable_t;
206# endif
207
208# define pte_val(x) (x)
209# define pmd_val(x) (x)
210# define pgd_val(x) (x)
211# define pgprot_val(x) (x)
212
213# define __pte(x) (x)
214# define __pgd(x) (x)
215# define __pgprot(x) (x)
216#endif
217
218#define PAGE_OFFSET RGN_BASE(RGN_KERNEL)
219
220#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \
221 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC | \
222 (((current->personality & READ_IMPLIES_EXEC) != 0) \
223 ? VM_EXEC : 0))
224
225#define GATE_ADDR RGN_BASE(RGN_GATE)
226
227
228
229
230
231#define KERNEL_START (GATE_ADDR+__IA64_UL_CONST(0x100000000))
232#define PERCPU_ADDR (-PERCPU_PAGE_SIZE)
233#define LOAD_OFFSET (KERNEL_START - KERNEL_TR_PAGE_SIZE)
234
235#define __HAVE_ARCH_GATE_AREA 1
236
237#endif
238
