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9#ifndef _ASM_RISCV_PAGE_H
10#define _ASM_RISCV_PAGE_H
11
12#include <linux/pfn.h>
13#include <linux/const.h>
14
15#define PAGE_SHIFT (12)
16#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
17#define PAGE_MASK (~(PAGE_SIZE - 1))
18
19#ifdef CONFIG_64BIT
20#define HUGE_MAX_HSTATE 2
21#else
22#define HUGE_MAX_HSTATE 1
23#endif
24#define HPAGE_SHIFT PMD_SHIFT
25#define HPAGE_SIZE (_AC(1, UL) << HPAGE_SHIFT)
26#define HPAGE_MASK (~(HPAGE_SIZE - 1))
27#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
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31
32
33
34#ifdef CONFIG_64BIT
35#ifdef CONFIG_MMU
36#define PAGE_OFFSET kernel_map.page_offset
37#else
38#define PAGE_OFFSET _AC(CONFIG_PAGE_OFFSET, UL)
39#endif
40
41
42
43
44#define PAGE_OFFSET_L4 _AC(0xffffaf8000000000, UL)
45#define PAGE_OFFSET_L3 _AC(0xffffffd800000000, UL)
46#else
47#define PAGE_OFFSET _AC(CONFIG_PAGE_OFFSET, UL)
48#endif
49
50#ifndef __ASSEMBLY__
51
52#define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE)
53#define copy_page(to, from) memcpy((to), (from), PAGE_SIZE)
54
55#define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE)
56#define copy_user_page(vto, vfrom, vaddr, topg) \
57 memcpy((vto), (vfrom), PAGE_SIZE)
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59
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61
62
63
64typedef struct {
65 unsigned long pgd;
66} pgd_t;
67
68
69typedef struct {
70 unsigned long pte;
71} pte_t;
72
73typedef struct {
74 unsigned long pgprot;
75} pgprot_t;
76
77typedef struct page *pgtable_t;
78
79#define pte_val(x) ((x).pte)
80#define pgd_val(x) ((x).pgd)
81#define pgprot_val(x) ((x).pgprot)
82
83#define __pte(x) ((pte_t) { (x) })
84#define __pgd(x) ((pgd_t) { (x) })
85#define __pgprot(x) ((pgprot_t) { (x) })
86
87#ifdef CONFIG_64BIT
88#define PTE_FMT "%016lx"
89#else
90#define PTE_FMT "%08lx"
91#endif
92
93#ifdef CONFIG_MMU
94extern unsigned long riscv_pfn_base;
95#define ARCH_PFN_OFFSET (riscv_pfn_base)
96#else
97#define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT)
98#endif
99
100struct kernel_mapping {
101 unsigned long page_offset;
102 unsigned long virt_addr;
103 uintptr_t phys_addr;
104 uintptr_t size;
105
106 unsigned long va_pa_offset;
107
108 unsigned long va_kernel_pa_offset;
109 unsigned long va_kernel_xip_pa_offset;
110#ifdef CONFIG_XIP_KERNEL
111 uintptr_t xiprom;
112 uintptr_t xiprom_sz;
113#endif
114};
115
116extern struct kernel_mapping kernel_map;
117extern phys_addr_t phys_ram_base;
118
119#define is_kernel_mapping(x) \
120 ((x) >= kernel_map.virt_addr && (x) < (kernel_map.virt_addr + kernel_map.size))
121
122#define is_linear_mapping(x) \
123 ((x) >= PAGE_OFFSET && (!IS_ENABLED(CONFIG_64BIT) || (x) < PAGE_OFFSET + KERN_VIRT_SIZE))
124
125#define linear_mapping_pa_to_va(x) ((void *)((unsigned long)(x) + kernel_map.va_pa_offset))
126#define kernel_mapping_pa_to_va(y) ({ \
127 unsigned long _y = y; \
128 (IS_ENABLED(CONFIG_XIP_KERNEL) && _y < phys_ram_base) ? \
129 (void *)((unsigned long)(_y) + kernel_map.va_kernel_xip_pa_offset) : \
130 (void *)((unsigned long)(_y) + kernel_map.va_kernel_pa_offset + XIP_OFFSET); \
131 })
132#define __pa_to_va_nodebug(x) linear_mapping_pa_to_va(x)
133
134#define linear_mapping_va_to_pa(x) ((unsigned long)(x) - kernel_map.va_pa_offset)
135#define kernel_mapping_va_to_pa(y) ({ \
136 unsigned long _y = y; \
137 (IS_ENABLED(CONFIG_XIP_KERNEL) && _y < kernel_map.virt_addr + XIP_OFFSET) ? \
138 ((unsigned long)(_y) - kernel_map.va_kernel_xip_pa_offset) : \
139 ((unsigned long)(_y) - kernel_map.va_kernel_pa_offset - XIP_OFFSET); \
140 })
141
142#define __va_to_pa_nodebug(x) ({ \
143 unsigned long _x = x; \
144 is_linear_mapping(_x) ? \
145 linear_mapping_va_to_pa(_x) : kernel_mapping_va_to_pa(_x); \
146 })
147
148#ifdef CONFIG_DEBUG_VIRTUAL
149extern phys_addr_t __virt_to_phys(unsigned long x);
150extern phys_addr_t __phys_addr_symbol(unsigned long x);
151#else
152#define __virt_to_phys(x) __va_to_pa_nodebug(x)
153#define __phys_addr_symbol(x) __va_to_pa_nodebug(x)
154#endif
155
156#define __pa_symbol(x) __phys_addr_symbol(RELOC_HIDE((unsigned long)(x), 0))
157#define __pa(x) __virt_to_phys((unsigned long)(x))
158#define __va(x) ((void *)__pa_to_va_nodebug((phys_addr_t)(x)))
159
160#define phys_to_pfn(phys) (PFN_DOWN(phys))
161#define pfn_to_phys(pfn) (PFN_PHYS(pfn))
162
163#define virt_to_pfn(vaddr) (phys_to_pfn(__pa(vaddr)))
164#define pfn_to_virt(pfn) (__va(pfn_to_phys(pfn)))
165
166#define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr)))
167#define page_to_virt(page) (pfn_to_virt(page_to_pfn(page)))
168
169#define page_to_phys(page) (pfn_to_phys(page_to_pfn(page)))
170#define page_to_bus(page) (page_to_phys(page))
171#define phys_to_page(paddr) (pfn_to_page(phys_to_pfn(paddr)))
172
173#define sym_to_pfn(x) __phys_to_pfn(__pa_symbol(x))
174
175#ifdef CONFIG_FLATMEM
176#define pfn_valid(pfn) \
177 (((pfn) >= ARCH_PFN_OFFSET) && (((pfn) - ARCH_PFN_OFFSET) < max_mapnr))
178#endif
179
180#endif
181
182#define virt_addr_valid(vaddr) ({ \
183 unsigned long _addr = (unsigned long)vaddr; \
184 (unsigned long)(_addr) >= PAGE_OFFSET && pfn_valid(virt_to_pfn(_addr)); \
185})
186
187#define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_NON_EXEC
188
189#include <asm-generic/memory_model.h>
190#include <asm-generic/getorder.h>
191
192#endif
193