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12#ifndef _ASM_MICROBLAZE_PAGE_H
13#define _ASM_MICROBLAZE_PAGE_H
14
15#include <linux/pfn.h>
16#include <asm/setup.h>
17#include <asm/asm-compat.h>
18#include <linux/const.h>
19
20#ifdef __KERNEL__
21
22
23#define PAGE_SHIFT 12
24#define PAGE_SIZE (ASM_CONST(1) << PAGE_SHIFT)
25#define PAGE_MASK (~(PAGE_SIZE-1))
26
27#define LOAD_OFFSET ASM_CONST((CONFIG_KERNEL_START-CONFIG_KERNEL_BASE_ADDR))
28
29#define PTE_SHIFT (PAGE_SHIFT - 2)
30
31#ifndef __ASSEMBLY__
32
33
34#define ARCH_DMA_MINALIGN L1_CACHE_BYTES
35
36#define ARCH_SLAB_MINALIGN L1_CACHE_BYTES
37
38#define PAGE_UP(addr) (((addr)+((PAGE_SIZE)-1))&(~((PAGE_SIZE)-1)))
39#define PAGE_DOWN(addr) ((addr)&(~((PAGE_SIZE)-1)))
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48#define PAGE_OFFSET CONFIG_KERNEL_START
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52
53typedef unsigned long pte_basic_t;
54#define PTE_FMT "%.8lx"
55
56# define copy_page(to, from) memcpy((to), (from), PAGE_SIZE)
57# define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE)
58
59# define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE)
60# define copy_user_page(vto, vfrom, vaddr, topg) \
61 memcpy((vto), (vfrom), PAGE_SIZE)
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65
66typedef struct page *pgtable_t;
67typedef struct { unsigned long pte; } pte_t;
68typedef struct { unsigned long pgprot; } pgprot_t;
69
70typedef struct { unsigned long pgd; } pgd_t;
71
72# define pte_val(x) ((x).pte)
73# define pgprot_val(x) ((x).pgprot)
74
75# define pgd_val(x) ((x).pgd)
76
77# define __pte(x) ((pte_t) { (x) })
78# define __pgd(x) ((pgd_t) { (x) })
79# define __pgprot(x) ((pgprot_t) { (x) })
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95extern unsigned long max_low_pfn;
96extern unsigned long min_low_pfn;
97extern unsigned long max_pfn;
98
99extern unsigned long memory_start;
100extern unsigned long memory_size;
101extern unsigned long lowmem_size;
102
103extern unsigned long kernel_tlb;
104
105extern int page_is_ram(unsigned long pfn);
106
107# define phys_to_pfn(phys) (PFN_DOWN(phys))
108# define pfn_to_phys(pfn) (PFN_PHYS(pfn))
109
110# define virt_to_pfn(vaddr) (phys_to_pfn((__pa(vaddr))))
111# define pfn_to_virt(pfn) __va(pfn_to_phys((pfn)))
112
113# define virt_to_page(kaddr) (pfn_to_page(__pa(kaddr) >> PAGE_SHIFT))
114# define page_to_virt(page) __va(page_to_pfn(page) << PAGE_SHIFT)
115# define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
116
117# define ARCH_PFN_OFFSET (memory_start >> PAGE_SHIFT)
118# define pfn_valid(pfn) ((pfn) < (max_mapnr + ARCH_PFN_OFFSET))
119
120# endif
121
122#define virt_addr_valid(vaddr) (pfn_valid(virt_to_pfn(vaddr)))
123
124# define __pa(x) __virt_to_phys((unsigned long)(x))
125# define __va(x) ((void *)__phys_to_virt((unsigned long)(x)))
126
127
128
129#define __virt_to_phys(addr) \
130 ((addr) + CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START)
131#define __phys_to_virt(addr) \
132 ((addr) + CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR)
133#define tophys(rd, rs) \
134 addik rd, rs, (CONFIG_KERNEL_BASE_ADDR - CONFIG_KERNEL_START)
135#define tovirt(rd, rs) \
136 addik rd, rs, (CONFIG_KERNEL_START - CONFIG_KERNEL_BASE_ADDR)
137
138#define TOPHYS(addr) __virt_to_phys(addr)
139
140#endif
141
142#include <asm-generic/memory_model.h>
143#include <asm-generic/getorder.h>
144
145#endif
146