]>
Commit | Line | Data |
---|---|---|
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 | 61 | |
2567d71c | 62 | #ifdef __KERNEL__ |
5dfcf14d | 63 | /* see comment in arch/x86/kernel/e820.c */ |
b79cd8f1 | 64 | extern struct e820map e820; |
5dfcf14d | 65 | extern struct e820map e820_saved; |
b79cd8f1 YL |
66 | |
67 | extern int e820_any_mapped(u64 start, u64 end, unsigned type); | |
68 | extern int e820_all_mapped(u64 start, u64 end, unsigned type); | |
d0be6bde | 69 | extern void e820_add_region(u64 start, u64 size, int type); |
b79cd8f1 | 70 | extern void e820_print_map(char *who); |
c3965bd1 | 71 | extern int |
6e9bcc79 | 72 | sanitize_e820_map(struct e820entry *biosmap, int max_nr_map, int *pnr_map); |
d0be6bde | 73 | extern u64 e820_update_range(u64 start, u64 size, unsigned old_type, |
b79cd8f1 | 74 | unsigned new_type); |
7a1fd986 YL |
75 | extern u64 e820_remove_range(u64 start, u64 size, unsigned old_type, |
76 | int checktype); | |
b79cd8f1 YL |
77 | extern void update_e820(void); |
78 | extern void e820_setup_gap(void); | |
3381959d | 79 | extern int e820_search_gap(unsigned long *gapstart, unsigned long *gapsize, |
fd6493e1 | 80 | unsigned long start_addr, unsigned long long end_addr); |
8c5beb50 HY |
81 | struct setup_data; |
82 | extern void parse_e820_ext(struct setup_data *data, unsigned long pa_data); | |
b79cd8f1 | 83 | |
bf62f398 YL |
84 | #if defined(CONFIG_X86_64) || \ |
85 | (defined(CONFIG_X86_32) && defined(CONFIG_HIBERNATION)) | |
86 | extern void e820_mark_nosave_regions(unsigned long limit_pfn); | |
87 | #else | |
88 | static inline void e820_mark_nosave_regions(unsigned long limit_pfn) | |
89 | { | |
90 | } | |
91 | #endif | |
92 | ||
ee0c80fa YL |
93 | extern unsigned long end_user_pfn; |
94 | ||
a4c81cf6 YL |
95 | extern u64 find_e820_area(u64 start, u64 end, u64 size, u64 align); |
96 | extern u64 find_e820_area_size(u64 start, u64 *sizep, u64 align); | |
97 | extern void reserve_early(u64 start, u64 end, char *name); | |
c4ba1320 | 98 | extern void reserve_early_overlap_ok(u64 start, u64 end, char *name); |
a4c81cf6 YL |
99 | extern void free_early(u64 start, u64 end); |
100 | extern void early_res_to_bootmem(u64 start, u64 end); | |
2944e16b | 101 | extern u64 early_reserve_e820(u64 startt, u64 sizet, u64 align); |
a4c81cf6 | 102 | |
f361a450 YL |
103 | extern unsigned long e820_end_of_ram_pfn(void); |
104 | extern unsigned long e820_end_of_low_ram_pfn(void); | |
ee0c80fa YL |
105 | extern int e820_find_active_region(const struct e820entry *ei, |
106 | unsigned long start_pfn, | |
107 | unsigned long last_pfn, | |
108 | unsigned long *ei_startpfn, | |
109 | unsigned long *ei_endpfn); | |
110 | extern void e820_register_active_regions(int nid, unsigned long start_pfn, | |
111 | unsigned long end_pfn); | |
112 | extern u64 e820_hole_size(u64 start, u64 end); | |
ab4a465e | 113 | extern void finish_e820_parsing(void); |
41c094fd | 114 | extern void e820_reserve_resources(void); |
064d25f1 | 115 | extern void setup_memory_map(void); |
95a71a45 | 116 | extern char *default_machine_specific_memory_setup(void); |
064d25f1 YL |
117 | extern char *machine_specific_memory_setup(void); |
118 | extern char *memory_setup(void); | |
2567d71c | 119 | #endif /* __KERNEL__ */ |
ee8e7cfe RR |
120 | #endif /* __ASSEMBLY__ */ |
121 | ||
306c142f IM |
122 | #define ISA_START_ADDRESS 0xa0000 |
123 | #define ISA_END_ADDRESS 0x100000 | |
bcc643dc | 124 | #define is_ISA_range(s, e) ((s) >= ISA_START_ADDRESS && (e) < ISA_END_ADDRESS) |
306c142f | 125 | |
950f9d95 TG |
126 | #define BIOS_BEGIN 0x000a0000 |
127 | #define BIOS_END 0x00100000 | |
128 | ||
ee8e7cfe | 129 | #ifdef __KERNEL__ |
064d25f1 YL |
130 | #include <linux/ioport.h> |
131 | ||
064d25f1 | 132 | #define HIGH_MEMORY (1024*1024) |
ee8e7cfe RR |
133 | #endif /* __KERNEL__ */ |
134 | ||
135 | #endif /* __ASM_E820_H */ |