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1965aae3 PA |
1 | #ifndef _ASM_X86_E820_H |
2 | #define _ASM_X86_E820_H | |
ee8e7cfe RR |
3 | #define E820MAP 0x2d0 /* our map */ |
4 | #define E820MAX 128 /* number of entries in E820MAP */ | |
028b7858 PJ |
5 | |
6 | /* | |
7 | * Legacy E820 BIOS limits us to 128 (E820MAX) nodes due to the | |
8 | * constrained space in the zeropage. If we have more nodes than | |
9 | * that, and if we've booted off EFI firmware, then the EFI tables | |
10 | * passed us from the EFI firmware can list more nodes. Size our | |
11 | * internal memory map tables to have room for these additional | |
12 | * nodes, based on up to three entries per node for which the | |
13 | * kernel was built: MAX_NUMNODES == (1 << CONFIG_NODES_SHIFT), | |
14 | * plus E820MAX, allowing space for the possible duplicate E820 | |
15 | * entries that might need room in the same arrays, prior to the | |
16 | * call to sanitize_e820_map() to remove duplicates. The allowance | |
17 | * of three memory map entries per node is "enough" entries for | |
18 | * the initial hardware platform motivating this mechanism to make | |
19 | * use of additional EFI map entries. Future platforms may want | |
20 | * to allow more than three entries per node or otherwise refine | |
21 | * this size. | |
22 | */ | |
23 | ||
24 | /* | |
25 | * Odd: 'make headers_check' complains about numa.h if I try | |
26 | * to collapse the next two #ifdef lines to a single line: | |
27 | * #if defined(__KERNEL__) && defined(CONFIG_EFI) | |
28 | */ | |
29 | #ifdef __KERNEL__ | |
30 | #ifdef CONFIG_EFI | |
31 | #include <linux/numa.h> | |
32 | #define E820_X_MAX (E820MAX + 3 * MAX_NUMNODES) | |
33 | #else /* ! CONFIG_EFI */ | |
34 | #define E820_X_MAX E820MAX | |
35 | #endif | |
36 | #else /* ! __KERNEL__ */ | |
37 | #define E820_X_MAX E820MAX | |
38 | #endif | |
39 | ||
ee8e7cfe RR |
40 | #define E820NR 0x1e8 /* # entries in E820MAP */ |
41 | ||
42 | #define E820_RAM 1 | |
43 | #define E820_RESERVED 2 | |
44 | #define E820_ACPI 3 | |
45 | #define E820_NVS 4 | |
671eef85 | 46 | #define E820_UNUSABLE 5 |
ee8e7cfe | 47 | |
4bd96a7a SW |
48 | /* |
49 | * reserved RAM used by kernel itself | |
50 | * if CONFIG_INTEL_TXT is enabled, memory of this type will be | |
51 | * included in the S3 integrity calculation and so should not include | |
52 | * any memory that BIOS might alter over the S3 transition | |
53 | */ | |
28bb2237 YL |
54 | #define E820_RESERVED_KERN 128 |
55 | ||
ee8e7cfe | 56 | #ifndef __ASSEMBLY__ |
999721ca | 57 | #include <linux/types.h> |
ee8e7cfe RR |
58 | struct e820entry { |
59 | __u64 addr; /* start of memory segment */ | |
60 | __u64 size; /* size of memory segment */ | |
61 | __u32 type; /* type of memory segment */ | |
62 | } __attribute__((packed)); | |
63 | ||
64 | struct e820map { | |
65 | __u32 nr_map; | |
028b7858 | 66 | struct e820entry map[E820_X_MAX]; |
ee8e7cfe | 67 | }; |
b79cd8f1 | 68 | |
65f116f5 PA |
69 | #define ISA_START_ADDRESS 0xa0000 |
70 | #define ISA_END_ADDRESS 0x100000 | |
71 | ||
72 | #define BIOS_BEGIN 0x000a0000 | |
73 | #define BIOS_END 0x00100000 | |
74 | ||
a2c606d5 BH |
75 | #define BIOS_ROM_BASE 0xffe00000 |
76 | #define BIOS_ROM_END 0xffffffff | |
77 | ||
2567d71c | 78 | #ifdef __KERNEL__ |
5dfcf14d | 79 | /* see comment in arch/x86/kernel/e820.c */ |
b79cd8f1 | 80 | extern struct e820map e820; |
5dfcf14d | 81 | extern struct e820map e820_saved; |
b79cd8f1 | 82 | |
a7b7511a | 83 | extern unsigned long pci_mem_start; |
b79cd8f1 YL |
84 | extern int e820_any_mapped(u64 start, u64 end, unsigned type); |
85 | extern int e820_all_mapped(u64 start, u64 end, unsigned type); | |
d0be6bde | 86 | extern void e820_add_region(u64 start, u64 size, int type); |
b79cd8f1 | 87 | extern void e820_print_map(char *who); |
c3965bd1 | 88 | extern int |
ba639039 | 89 | sanitize_e820_map(struct e820entry *biosmap, int max_nr_map, u32 *pnr_map); |
d0be6bde | 90 | extern u64 e820_update_range(u64 start, u64 size, unsigned old_type, |
b79cd8f1 | 91 | unsigned new_type); |
7a1fd986 YL |
92 | extern u64 e820_remove_range(u64 start, u64 size, unsigned old_type, |
93 | int checktype); | |
b79cd8f1 YL |
94 | extern void update_e820(void); |
95 | extern void e820_setup_gap(void); | |
3381959d | 96 | extern int e820_search_gap(unsigned long *gapstart, unsigned long *gapsize, |
fd6493e1 | 97 | unsigned long start_addr, unsigned long long end_addr); |
8c5beb50 HY |
98 | struct setup_data; |
99 | extern void parse_e820_ext(struct setup_data *data, unsigned long pa_data); | |
b79cd8f1 | 100 | |
bf62f398 YL |
101 | #if defined(CONFIG_X86_64) || \ |
102 | (defined(CONFIG_X86_32) && defined(CONFIG_HIBERNATION)) | |
103 | extern void e820_mark_nosave_regions(unsigned long limit_pfn); | |
104 | #else | |
105 | static inline void e820_mark_nosave_regions(unsigned long limit_pfn) | |
106 | { | |
107 | } | |
108 | #endif | |
109 | ||
1f067167 YL |
110 | #ifdef CONFIG_MEMTEST |
111 | extern void early_memtest(unsigned long start, unsigned long end); | |
112 | #else | |
113 | static inline void early_memtest(unsigned long start, unsigned long end) | |
114 | { | |
115 | } | |
116 | #endif | |
117 | ||
f361a450 YL |
118 | extern unsigned long e820_end_of_ram_pfn(void); |
119 | extern unsigned long e820_end_of_low_ram_pfn(void); | |
72d7c3b3 YL |
120 | extern u64 early_reserve_e820(u64 startt, u64 sizet, u64 align); |
121 | ||
122 | void memblock_x86_fill(void); | |
6f2a7536 YL |
123 | void memblock_find_dma_reserve(void); |
124 | ||
ab4a465e | 125 | extern void finish_e820_parsing(void); |
41c094fd | 126 | extern void e820_reserve_resources(void); |
58f7c988 | 127 | extern void e820_reserve_resources_late(void); |
064d25f1 | 128 | extern void setup_memory_map(void); |
95a71a45 | 129 | extern char *default_machine_specific_memory_setup(void); |
ee8e7cfe | 130 | |
ccef0864 PA |
131 | /* |
132 | * Returns true iff the specified range [s,e) is completely contained inside | |
133 | * the ISA region. | |
134 | */ | |
65f116f5 PA |
135 | static inline bool is_ISA_range(u64 s, u64 e) |
136 | { | |
ccef0864 | 137 | return s >= ISA_START_ADDRESS && e <= ISA_END_ADDRESS; |
65f116f5 | 138 | } |
306c142f | 139 | |
65f116f5 PA |
140 | #endif /* __KERNEL__ */ |
141 | #endif /* __ASSEMBLY__ */ | |
950f9d95 | 142 | |
ee8e7cfe | 143 | #ifdef __KERNEL__ |
064d25f1 YL |
144 | #include <linux/ioport.h> |
145 | ||
064d25f1 | 146 | #define HIGH_MEMORY (1024*1024) |
ee8e7cfe RR |
147 | #endif /* __KERNEL__ */ |
148 | ||
1965aae3 | 149 | #endif /* _ASM_X86_E820_H */ |