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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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29
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31
32
33
34#define PAGE_OFFSET _AC(CONFIG_PAGE_OFFSET, UL)
35
36#define KERN_VIRT_SIZE (-PAGE_OFFSET)
37
38#ifndef __ASSEMBLY__
39
40#define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE)
41#define copy_page(to, from) memcpy((to), (from), PAGE_SIZE)
42
43#define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZE)
44#define copy_user_page(vto, vfrom, vaddr, topg) \
45 memcpy((vto), (vfrom), PAGE_SIZE)
46
47
48
49
50
51
52typedef struct {
53 unsigned long pgd;
54} pgd_t;
55
56
57typedef struct {
58 unsigned long pte;
59} pte_t;
60
61typedef struct {
62 unsigned long pgprot;
63} pgprot_t;
64
65typedef struct page *pgtable_t;
66
67#define pte_val(x) ((x).pte)
68#define pgd_val(x) ((x).pgd)
69#define pgprot_val(x) ((x).pgprot)
70
71#define __pte(x) ((pte_t) { (x) })
72#define __pgd(x) ((pgd_t) { (x) })
73#define __pgprot(x) ((pgprot_t) { (x) })
74
75#ifdef CONFIG_64BIT
76#define PTE_FMT "%016lx"
77#else
78#define PTE_FMT "%08lx"
79#endif
80
81#ifdef CONFIG_MMU
82extern unsigned long riscv_pfn_base;
83#define ARCH_PFN_OFFSET (riscv_pfn_base)
84#else
85#define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT)
86#endif
87
88struct kernel_mapping {
89 unsigned long virt_addr;
90 uintptr_t phys_addr;
91 uintptr_t size;
92
93 unsigned long va_pa_offset;
94
95 unsigned long va_kernel_pa_offset;
96 unsigned long va_kernel_xip_pa_offset;
97#ifdef CONFIG_XIP_KERNEL
98 uintptr_t xiprom;
99 uintptr_t xiprom_sz;
100#endif
101};
102
103extern struct kernel_mapping kernel_map;
104extern phys_addr_t phys_ram_base;
105
106#define is_kernel_mapping(x) \
107 ((x) >= kernel_map.virt_addr && (x) < (kernel_map.virt_addr + kernel_map.size))
108
109#define is_linear_mapping(x) \
110 ((x) >= PAGE_OFFSET && (!IS_ENABLED(CONFIG_64BIT) || (x) < kernel_map.virt_addr))
111
112#define linear_mapping_pa_to_va(x) ((void *)((unsigned long)(x) + kernel_map.va_pa_offset))
113#define kernel_mapping_pa_to_va(y) ({ \
114 unsigned long _y = y; \
115 (IS_ENABLED(CONFIG_XIP_KERNEL) && _y < phys_ram_base) ? \
116 (void *)((unsigned long)(_y) + kernel_map.va_kernel_xip_pa_offset) : \
117 (void *)((unsigned long)(_y) + kernel_map.va_kernel_pa_offset + XIP_OFFSET); \
118 })
119#define __pa_to_va_nodebug(x) linear_mapping_pa_to_va(x)
120
121#define linear_mapping_va_to_pa(x) ((unsigned long)(x) - kernel_map.va_pa_offset)
122#define kernel_mapping_va_to_pa(y) ({ \
123 unsigned long _y = y; \
124 (IS_ENABLED(CONFIG_XIP_KERNEL) && _y < kernel_map.virt_addr + XIP_OFFSET) ? \
125 ((unsigned long)(_y) - kernel_map.va_kernel_xip_pa_offset) : \
126 ((unsigned long)(_y) - kernel_map.va_kernel_pa_offset - XIP_OFFSET); \
127 })
128
129#define __va_to_pa_nodebug(x) ({ \
130 unsigned long _x = x; \
131 is_linear_mapping(_x) ? \
132 linear_mapping_va_to_pa(_x) : kernel_mapping_va_to_pa(_x); \
133 })
134
135#ifdef CONFIG_DEBUG_VIRTUAL
136extern phys_addr_t __virt_to_phys(unsigned long x);
137extern phys_addr_t __phys_addr_symbol(unsigned long x);
138#else
139#define __virt_to_phys(x) __va_to_pa_nodebug(x)
140#define __phys_addr_symbol(x) __va_to_pa_nodebug(x)
141#endif
142
143#define __pa_symbol(x) __phys_addr_symbol(RELOC_HIDE((unsigned long)(x), 0))
144#define __pa(x) __virt_to_phys((unsigned long)(x))
145#define __va(x) ((void *)__pa_to_va_nodebug((phys_addr_t)(x)))
146
147#define phys_to_pfn(phys) (PFN_DOWN(phys))
148#define pfn_to_phys(pfn) (PFN_PHYS(pfn))
149
150#define virt_to_pfn(vaddr) (phys_to_pfn(__pa(vaddr)))
151#define pfn_to_virt(pfn) (__va(pfn_to_phys(pfn)))
152
153#define virt_to_page(vaddr) (pfn_to_page(virt_to_pfn(vaddr)))
154#define page_to_virt(page) (pfn_to_virt(page_to_pfn(page)))
155
156#define page_to_phys(page) (pfn_to_phys(page_to_pfn(page)))
157#define page_to_bus(page) (page_to_phys(page))
158#define phys_to_page(paddr) (pfn_to_page(phys_to_pfn(paddr)))
159
160#ifdef CONFIG_FLATMEM
161#define pfn_valid(pfn) \
162 (((pfn) >= ARCH_PFN_OFFSET) && (((pfn) - ARCH_PFN_OFFSET) < max_mapnr))
163#endif
164
165#endif
166
167#define virt_addr_valid(vaddr) ({ \
168 unsigned long _addr = (unsigned long)vaddr; \
169 (unsigned long)(_addr) >= PAGE_OFFSET && pfn_valid(virt_to_pfn(_addr)); \
170})
171
172#define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_NON_EXEC
173
174#include <asm-generic/memory_model.h>
175#include <asm-generic/getorder.h>
176
177#endif
178
