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15#ifndef _ASM_MICROBLAZE_PAGE_H
16#define _ASM_MICROBLAZE_PAGE_H
17
18#include <linux/pfn.h>
19#include <asm/setup.h>
20#include <asm/asm-compat.h>
21#include <linux/const.h>
22
23#ifdef __KERNEL__
24
25
26#if defined(CONFIG_MICROBLAZE_32K_PAGES)
27#define PAGE_SHIFT 15
28#elif defined(CONFIG_MICROBLAZE_16K_PAGES)
29#define PAGE_SHIFT 14
30#elif defined(CONFIG_MICROBLAZE_8K_PAGES)
31#define PAGE_SHIFT 13
32#else
33#define PAGE_SHIFT 12
34#endif
35#define PAGE_SIZE (ASM_CONST(1) << PAGE_SHIFT)
36#define PAGE_MASK (~(PAGE_SIZE-1))
37
38#define LOAD_OFFSET ASM_CONST((CONFIG_KERNEL_START-CONFIG_KERNEL_BASE_ADDR))
39
40#ifndef __ASSEMBLY__
41
42
43#define ARCH_DMA_MINALIGN L1_CACHE_BYTES
44
45#define ARCH_SLAB_MINALIGN L1_CACHE_BYTES
46
47#define PAGE_UP(addr) (((addr)+((PAGE_SIZE)-1))&(~((PAGE_SIZE)-1)))
48#define PAGE_DOWN(addr) ((addr)&(~((PAGE_SIZE)-1)))
49
50#ifndef CONFIG_MMU
51
52
53
54
55
56extern unsigned int __page_offset;
57#define PAGE_OFFSET __page_offset
58
59#else
60
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66
67
68#define PAGE_OFFSET CONFIG_KERNEL_START
69
70
71
72
73typedef unsigned long pte_basic_t;
74#define PTE_SHIFT (PAGE_SHIFT - 2)
75#define PTE_FMT "%.8lx"
76
77#endif
78
79# define copy_page(to, from) memcpy((to), (from), PAGE_SIZE)
80# define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE)
81
82# define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE)
83# define copy_user_page(vto, vfrom, vaddr, topg) \
84 memcpy((vto), (vfrom), PAGE_SIZE)
85
86
87
88
89typedef struct page *pgtable_t;
90typedef struct { unsigned long pte; } pte_t;
91typedef struct { unsigned long pgprot; } pgprot_t;
92
93# ifdef CONFIG_MMU
94typedef struct { unsigned long pmd; } pmd_t;
95typedef struct { unsigned long pgd; } pgd_t;
96# else
97typedef struct { unsigned long ste[64]; } pmd_t;
98typedef struct { pmd_t pue[1]; } pud_t;
99typedef struct { pud_t pge[1]; } pgd_t;
100# endif
101
102# define pte_val(x) ((x).pte)
103# define pgprot_val(x) ((x).pgprot)
104
105# ifdef CONFIG_MMU
106# define pmd_val(x) ((x).pmd)
107# define pgd_val(x) ((x).pgd)
108# else
109# define pmd_val(x) ((x).ste[0])
110# define pud_val(x) ((x).pue[0])
111# define pgd_val(x) ((x).pge[0])
112# endif
113
114# define __pte(x) ((pte_t) { (x) })
115# define __pmd(x) ((pmd_t) { (x) })
116# define __pgd(x) ((pgd_t) { (x) })
117# define __pgprot(x) ((pgprot_t) { (x) })
118
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131
132
133extern unsigned long max_low_pfn;
134extern unsigned long min_low_pfn;
135extern unsigned long max_pfn;
136
137extern unsigned long memory_start;
138extern unsigned long memory_end;
139extern unsigned long memory_size;
140
141extern int page_is_ram(unsigned long pfn);
142
143# define phys_to_pfn(phys) (PFN_DOWN(phys))
144# define pfn_to_phys(pfn) (PFN_PHYS(pfn))
145
146# define virt_to_pfn(vaddr) (phys_to_pfn((__pa(vaddr))))
147# define pfn_to_virt(pfn) __va(pfn_to_phys((pfn)))
148
149# ifdef CONFIG_MMU
150
151# define virt_to_page(kaddr) (pfn_to_page(__pa(kaddr) >> PAGE_SHIFT))
152# define page_to_virt(page) __va(page_to_pfn(page) << PAGE_SHIFT)
153# define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
154
155# else
156# define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr)))
157# define page_to_virt(page) (pfn_to_virt(page_to_pfn(page)))
158# define page_to_phys(page) (pfn_to_phys(page_to_pfn(page)))
159# define page_to_bus(page) (page_to_phys(page))
160# define phys_to_page(paddr) (pfn_to_page(phys_to_pfn(paddr)))
161# endif
162
163# ifndef CONFIG_MMU
164# define pfn_valid(pfn) (((pfn) >= min_low_pfn) && \
165 ((pfn) <= (min_low_pfn + max_mapnr)))
166# define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT)
167# else
168# define ARCH_PFN_OFFSET (memory_start >> PAGE_SHIFT)
169# define pfn_valid(pfn) ((pfn) < (max_mapnr + ARCH_PFN_OFFSET))
170# define VALID_PAGE(page) ((page - mem_map) < max_mapnr)
171# endif
172
173# endif
174
175#define virt_addr_valid(vaddr) (pfn_valid(virt_to_pfn(vaddr)))
176
177
178# ifndef CONFIG_MMU
179# define __pa(vaddr) ((unsigned long) (vaddr))
180# define __va(paddr) ((void *) (paddr))
181# else
182# define __pa(x) __virt_to_phys((unsigned long)(x))
183# define __va(x) ((void *)__phys_to_virt((unsigned long)(x)))
184# endif
185
186
187
188
189#ifndef CONFIG_MMU
190#define __virt_to_phys(addr) addr
191#define __phys_to_virt(addr) addr
192#define tophys(rd, rs) addik rd, rs, 0
193#define tovirt(rd, rs) addik rd, rs, 0
194#else
195#define __virt_to_phys(addr) \
196 ((addr) + CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START)
197#define __phys_to_virt(addr) \
198 ((addr) + CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR)
199#define tophys(rd, rs) \
200 addik rd, rs, (CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START)
201#define tovirt(rd, rs) \
202 addik rd, rs, (CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR)
203#endif
204
205#define TOPHYS(addr) __virt_to_phys(addr)
206
207#ifdef CONFIG_MMU
208
209#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
210 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
211#endif
212
213#endif
214
215#include <asm-generic/memory_model.h>
216#include <asm-generic/getorder.h>
217
218#endif
219