Commit | Line | Data |
---|---|---|
4f04d8f0 CM |
1 | /* |
2 | * Based on arch/arm/include/asm/memory.h | |
3 | * | |
4 | * Copyright (C) 2000-2002 Russell King | |
5 | * Copyright (C) 2012 ARM Ltd. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | * | |
19 | * Note: this file should not be included by non-asm/.h files | |
20 | */ | |
21 | #ifndef __ASM_MEMORY_H | |
22 | #define __ASM_MEMORY_H | |
23 | ||
24 | #include <linux/compiler.h> | |
25 | #include <linux/const.h> | |
26 | #include <linux/types.h> | |
27 | #include <asm/sizes.h> | |
28 | ||
29 | /* | |
30 | * Allow for constants defined here to be used from assembly code | |
31 | * by prepending the UL suffix only with actual C code compilation. | |
32 | */ | |
33 | #define UL(x) _AC(x, UL) | |
34 | ||
aa03c428 MR |
35 | /* |
36 | * Size of the PCI I/O space. This must remain a power of two so that | |
37 | * IO_SPACE_LIMIT acts as a mask for the low bits of I/O addresses. | |
38 | */ | |
39 | #define PCI_IO_SIZE SZ_16M | |
40 | ||
4f04d8f0 | 41 | /* |
847264fb CM |
42 | * PAGE_OFFSET - the virtual address of the start of the kernel image (top |
43 | * (VA_BITS - 1)) | |
4f04d8f0 CM |
44 | * VA_BITS - the maximum number of bits for virtual addresses. |
45 | * TASK_SIZE - the maximum size of a user space task. | |
46 | * TASK_UNMAPPED_BASE - the lower boundary of the mmap VM area. | |
47 | * The module space lives between the addresses given by TASK_SIZE | |
48 | * and PAGE_OFFSET - it must be within 128MB of the kernel text. | |
49 | */ | |
e41ceed0 | 50 | #define VA_BITS (CONFIG_ARM64_VA_BITS) |
847264fb | 51 | #define PAGE_OFFSET (UL(0xffffffffffffffff) << (VA_BITS - 1)) |
4f04d8f0 CM |
52 | #define MODULES_END (PAGE_OFFSET) |
53 | #define MODULES_VADDR (MODULES_END - SZ_64M) | |
aa03c428 MR |
54 | #define PCI_IO_END (MODULES_VADDR - SZ_2M) |
55 | #define PCI_IO_START (PCI_IO_END - PCI_IO_SIZE) | |
56 | #define FIXADDR_TOP (PCI_IO_START - SZ_2M) | |
4f04d8f0 CM |
57 | #define TASK_SIZE_64 (UL(1) << VA_BITS) |
58 | ||
59 | #ifdef CONFIG_COMPAT | |
60 | #define TASK_SIZE_32 UL(0x100000000) | |
61 | #define TASK_SIZE (test_thread_flag(TIF_32BIT) ? \ | |
62 | TASK_SIZE_32 : TASK_SIZE_64) | |
fa2ec3ea CC |
63 | #define TASK_SIZE_OF(tsk) (test_tsk_thread_flag(tsk, TIF_32BIT) ? \ |
64 | TASK_SIZE_32 : TASK_SIZE_64) | |
4f04d8f0 CM |
65 | #else |
66 | #define TASK_SIZE TASK_SIZE_64 | |
67 | #endif /* CONFIG_COMPAT */ | |
68 | ||
69 | #define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 4)) | |
70 | ||
71 | #if TASK_SIZE_64 > MODULES_VADDR | |
72 | #error Top of 64-bit user space clashes with start of module space | |
73 | #endif | |
74 | ||
75 | /* | |
76 | * Physical vs virtual RAM address space conversion. These are | |
77 | * private definitions which should NOT be used outside memory.h | |
78 | * files. Use virt_to_phys/phys_to_virt/__pa/__va instead. | |
79 | */ | |
80 | #define __virt_to_phys(x) (((phys_addr_t)(x) - PAGE_OFFSET + PHYS_OFFSET)) | |
81 | #define __phys_to_virt(x) ((unsigned long)((x) - PHYS_OFFSET + PAGE_OFFSET)) | |
82 | ||
4f04d8f0 CM |
83 | /* |
84 | * Convert a page to/from a physical address | |
85 | */ | |
86 | #define page_to_phys(page) (__pfn_to_phys(page_to_pfn(page))) | |
87 | #define phys_to_page(phys) (pfn_to_page(__phys_to_pfn(phys))) | |
88 | ||
89 | /* | |
90 | * Memory types available. | |
91 | */ | |
92 | #define MT_DEVICE_nGnRnE 0 | |
93 | #define MT_DEVICE_nGnRE 1 | |
94 | #define MT_DEVICE_GRE 2 | |
95 | #define MT_NORMAL_NC 3 | |
96 | #define MT_NORMAL 4 | |
97 | ||
36311607 MZ |
98 | /* |
99 | * Memory types for Stage-2 translation | |
100 | */ | |
101 | #define MT_S2_NORMAL 0xf | |
102 | #define MT_S2_DEVICE_nGnRE 0x1 | |
103 | ||
4f04d8f0 CM |
104 | #ifndef __ASSEMBLY__ |
105 | ||
106 | extern phys_addr_t memstart_addr; | |
107 | /* PHYS_OFFSET - the physical address of the start of memory. */ | |
108 | #define PHYS_OFFSET ({ memstart_addr; }) | |
109 | ||
34ba2c42 AB |
110 | /* |
111 | * The maximum physical address that the linear direct mapping | |
112 | * of system RAM can cover. (PAGE_OFFSET can be interpreted as | |
113 | * a 2's complement signed quantity and negated to derive the | |
114 | * maximum size of the linear mapping.) | |
115 | */ | |
116 | #define MAX_MEMBLOCK_ADDR ({ memstart_addr - PAGE_OFFSET - 1; }) | |
117 | ||
4f04d8f0 CM |
118 | /* |
119 | * PFNs are used to describe any physical page; this means | |
120 | * PFN 0 == physical address 0. | |
121 | * | |
122 | * This is the PFN of the first RAM page in the kernel | |
123 | * direct-mapped view. We assume this is the first page | |
124 | * of RAM in the mem_map as well. | |
125 | */ | |
126 | #define PHYS_PFN_OFFSET (PHYS_OFFSET >> PAGE_SHIFT) | |
127 | ||
128 | /* | |
129 | * Note: Drivers should NOT use these. They are the wrong | |
130 | * translation for translating DMA addresses. Use the driver | |
131 | * DMA support - see dma-mapping.h. | |
132 | */ | |
09a57239 | 133 | #define virt_to_phys virt_to_phys |
4f04d8f0 CM |
134 | static inline phys_addr_t virt_to_phys(const volatile void *x) |
135 | { | |
136 | return __virt_to_phys((unsigned long)(x)); | |
137 | } | |
138 | ||
09a57239 | 139 | #define phys_to_virt phys_to_virt |
4f04d8f0 CM |
140 | static inline void *phys_to_virt(phys_addr_t x) |
141 | { | |
142 | return (void *)(__phys_to_virt(x)); | |
143 | } | |
144 | ||
145 | /* | |
146 | * Drivers should NOT use these either. | |
147 | */ | |
148 | #define __pa(x) __virt_to_phys((unsigned long)(x)) | |
149 | #define __va(x) ((void *)__phys_to_virt((phys_addr_t)(x))) | |
150 | #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) | |
1f53ba6e | 151 | #define virt_to_pfn(x) __phys_to_pfn(__virt_to_phys(x)) |
4f04d8f0 CM |
152 | |
153 | /* | |
154 | * virt_to_page(k) convert a _valid_ virtual address to struct page * | |
155 | * virt_addr_valid(k) indicates whether a virtual address is valid | |
156 | */ | |
5fd6690c | 157 | #define ARCH_PFN_OFFSET ((unsigned long)PHYS_PFN_OFFSET) |
4f04d8f0 CM |
158 | |
159 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) | |
e26db3f3 | 160 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) |
4f04d8f0 CM |
161 | |
162 | #endif | |
163 | ||
164 | #include <asm-generic/memory_model.h> | |
165 | ||
166 | #endif |