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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_64K_PAGES)
27#define PAGE_SHIFT 16
28#elif defined(CONFIG_MICROBLAZE_16K_PAGES)
29#define PAGE_SHIFT 14
30#else
31#define PAGE_SHIFT 12
32#endif
33#define PAGE_SIZE (ASM_CONST(1) << PAGE_SHIFT)
34#define PAGE_MASK (~(PAGE_SIZE-1))
35
36#define LOAD_OFFSET ASM_CONST((CONFIG_KERNEL_START-CONFIG_KERNEL_BASE_ADDR))
37
38#define PTE_SHIFT (PAGE_SHIFT - 2)
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_FMT "%.8lx"
75
76#endif
77
78# define copy_page(to, from) memcpy((to), (from), PAGE_SIZE)
79# define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE)
80
81# define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE)
82# define copy_user_page(vto, vfrom, vaddr, topg) \
83 memcpy((vto), (vfrom), PAGE_SIZE)
84
85
86
87
88typedef struct page *pgtable_t;
89typedef struct { unsigned long pte; } pte_t;
90typedef struct { unsigned long pgprot; } pgprot_t;
91
92# ifdef CONFIG_MMU
93typedef struct { unsigned long pmd; } pmd_t;
94typedef struct { unsigned long pgd; } pgd_t;
95# else
96typedef struct { unsigned long ste[64]; } pmd_t;
97typedef struct { pmd_t pue[1]; } pud_t;
98typedef struct { pud_t p4e[1]; } p4d_t;
99typedef struct { p4d_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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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_size;
139extern unsigned long lowmem_size;
140
141extern unsigned long kernel_tlb;
142
143extern int page_is_ram(unsigned long pfn);
144
145# define phys_to_pfn(phys) (PFN_DOWN(phys))
146# define pfn_to_phys(pfn) (PFN_PHYS(pfn))
147
148# define virt_to_pfn(vaddr) (phys_to_pfn((__pa(vaddr))))
149# define pfn_to_virt(pfn) __va(pfn_to_phys((pfn)))
150
151# ifdef CONFIG_MMU
152
153# define virt_to_page(kaddr) (pfn_to_page(__pa(kaddr) >> PAGE_SHIFT))
154# define page_to_virt(page) __va(page_to_pfn(page) << PAGE_SHIFT)
155# define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
156
157# else
158# define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr)))
159# define page_to_virt(page) (pfn_to_virt(page_to_pfn(page)))
160# define page_to_phys(page) (pfn_to_phys(page_to_pfn(page)))
161# define page_to_bus(page) (page_to_phys(page))
162# define phys_to_page(paddr) (pfn_to_page(phys_to_pfn(paddr)))
163# endif
164
165# ifndef CONFIG_MMU
166# define pfn_valid(pfn) (((pfn) >= min_low_pfn) && \
167 ((pfn) <= (min_low_pfn + max_mapnr)))
168# define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT)
169# else
170# define ARCH_PFN_OFFSET (memory_start >> PAGE_SHIFT)
171# define pfn_valid(pfn) ((pfn) < (max_mapnr + ARCH_PFN_OFFSET))
172# endif
173
174# endif
175
176#define virt_addr_valid(vaddr) (pfn_valid(virt_to_pfn(vaddr)))
177
178# define __pa(x) __virt_to_phys((unsigned long)(x))
179# define __va(x) ((void *)__phys_to_virt((unsigned long)(x)))
180
181
182
183#ifndef CONFIG_MMU
184#define __virt_to_phys(addr) addr
185#define __phys_to_virt(addr) addr
186#define tophys(rd, rs) addik rd, rs, 0
187#define tovirt(rd, rs) addik rd, rs, 0
188#else
189#define __virt_to_phys(addr) \
190 ((addr) + CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START)
191#define __phys_to_virt(addr) \
192 ((addr) + CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR)
193#define tophys(rd, rs) \
194 addik rd, rs, (CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START)
195#define tovirt(rd, rs) \
196 addik rd, rs, (CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR)
197#endif
198
199#define TOPHYS(addr) __virt_to_phys(addr)
200
201#ifdef CONFIG_MMU
202
203#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
204 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
205#endif
206
207#endif
208
209#include <asm-generic/memory_model.h>
210#include <asm-generic/getorder.h>
211
212#endif
213