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ee8e7cfe RR |
1 | #ifndef __ASM_E820_H |
2 | #define __ASM_E820_H | |
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 | |
46 | ||
28bb2237 YL |
47 | /* reserved RAM used by kernel itself */ |
48 | #define E820_RESERVED_KERN 128 | |
49 | ||
ee8e7cfe RR |
50 | #ifndef __ASSEMBLY__ |
51 | struct e820entry { | |
52 | __u64 addr; /* start of memory segment */ | |
53 | __u64 size; /* size of memory segment */ | |
54 | __u32 type; /* type of memory segment */ | |
55 | } __attribute__((packed)); | |
56 | ||
57 | struct e820map { | |
58 | __u32 nr_map; | |
028b7858 | 59 | struct e820entry map[E820_X_MAX]; |
ee8e7cfe | 60 | }; |
b79cd8f1 YL |
61 | |
62 | extern struct e820map e820; | |
63 | ||
64 | extern int e820_any_mapped(u64 start, u64 end, unsigned type); | |
65 | extern int e820_all_mapped(u64 start, u64 end, unsigned type); | |
d0be6bde | 66 | extern void e820_add_region(u64 start, u64 size, int type); |
b79cd8f1 | 67 | extern void e820_print_map(char *who); |
c3965bd1 | 68 | extern int |
6e9bcc79 | 69 | sanitize_e820_map(struct e820entry *biosmap, int max_nr_map, int *pnr_map); |
d0be6bde | 70 | extern u64 e820_update_range(u64 start, u64 size, unsigned old_type, |
b79cd8f1 | 71 | unsigned new_type); |
7a1fd986 YL |
72 | extern u64 e820_remove_range(u64 start, u64 size, unsigned old_type, |
73 | int checktype); | |
b79cd8f1 YL |
74 | extern void update_e820(void); |
75 | extern void e820_setup_gap(void); | |
3381959d | 76 | extern int e820_search_gap(unsigned long *gapstart, unsigned long *gapsize, |
fd6493e1 | 77 | unsigned long start_addr, unsigned long long end_addr); |
8c5beb50 HY |
78 | struct setup_data; |
79 | extern void parse_e820_ext(struct setup_data *data, unsigned long pa_data); | |
b79cd8f1 | 80 | |
bf62f398 YL |
81 | #if defined(CONFIG_X86_64) || \ |
82 | (defined(CONFIG_X86_32) && defined(CONFIG_HIBERNATION)) | |
83 | extern void e820_mark_nosave_regions(unsigned long limit_pfn); | |
84 | #else | |
85 | static inline void e820_mark_nosave_regions(unsigned long limit_pfn) | |
86 | { | |
87 | } | |
88 | #endif | |
89 | ||
ee0c80fa YL |
90 | extern unsigned long end_user_pfn; |
91 | ||
a4c81cf6 YL |
92 | extern u64 find_e820_area(u64 start, u64 end, u64 size, u64 align); |
93 | extern u64 find_e820_area_size(u64 start, u64 *sizep, u64 align); | |
94 | extern void reserve_early(u64 start, u64 end, char *name); | |
c4ba1320 | 95 | extern void reserve_early_overlap_ok(u64 start, u64 end, char *name); |
a4c81cf6 YL |
96 | extern void free_early(u64 start, u64 end); |
97 | extern void early_res_to_bootmem(u64 start, u64 end); | |
2944e16b | 98 | extern u64 early_reserve_e820(u64 startt, u64 sizet, u64 align); |
a4c81cf6 | 99 | |
ee0c80fa YL |
100 | extern unsigned long e820_end_of_ram(void); |
101 | extern int e820_find_active_region(const struct e820entry *ei, | |
102 | unsigned long start_pfn, | |
103 | unsigned long last_pfn, | |
104 | unsigned long *ei_startpfn, | |
105 | unsigned long *ei_endpfn); | |
106 | extern void e820_register_active_regions(int nid, unsigned long start_pfn, | |
107 | unsigned long end_pfn); | |
108 | extern u64 e820_hole_size(u64 start, u64 end); | |
ab4a465e | 109 | extern void finish_e820_parsing(void); |
41c094fd | 110 | extern void e820_reserve_resources(void); |
064d25f1 | 111 | extern void setup_memory_map(void); |
95a71a45 | 112 | extern char *default_machine_specific_memory_setup(void); |
064d25f1 YL |
113 | extern char *machine_specific_memory_setup(void); |
114 | extern char *memory_setup(void); | |
ab4a465e | 115 | |
ee8e7cfe RR |
116 | #endif /* __ASSEMBLY__ */ |
117 | ||
306c142f IM |
118 | #define ISA_START_ADDRESS 0xa0000 |
119 | #define ISA_END_ADDRESS 0x100000 | |
bcc643dc | 120 | #define is_ISA_range(s, e) ((s) >= ISA_START_ADDRESS && (e) < ISA_END_ADDRESS) |
306c142f | 121 | |
950f9d95 TG |
122 | #define BIOS_BEGIN 0x000a0000 |
123 | #define BIOS_END 0x00100000 | |
124 | ||
ee8e7cfe | 125 | #ifdef __KERNEL__ |
064d25f1 YL |
126 | #include <linux/ioport.h> |
127 | ||
064d25f1 | 128 | #define HIGH_MEMORY (1024*1024) |
ee8e7cfe RR |
129 | #endif /* __KERNEL__ */ |
130 | ||
131 | #endif /* __ASM_E820_H */ |