diff options
author | Al Viro <viro@zeniv.linux.org.uk> | 2008-08-17 21:05:42 -0400 |
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committer | H. Peter Anvin <hpa@zytor.com> | 2008-10-23 01:55:20 -0400 |
commit | bb8985586b7a906e116db835c64773b7a7d51663 (patch) | |
tree | de93ae58e88cc563d95cc124a73f3930594c6100 /arch/x86/include/asm/e820.h | |
parent | 8ede0bdb63305d3353efd97e9af6210afb05734e (diff) |
x86, um: ... and asm-x86 move
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/include/asm/e820.h')
-rw-r--r-- | arch/x86/include/asm/e820.h | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/arch/x86/include/asm/e820.h b/arch/x86/include/asm/e820.h new file mode 100644 index 000000000000..5abbdec06bd2 --- /dev/null +++ b/arch/x86/include/asm/e820.h | |||
@@ -0,0 +1,146 @@ | |||
1 | #ifndef ASM_X86__E820_H | ||
2 | #define ASM_X86__E820_H | ||
3 | #define E820MAP 0x2d0 /* our map */ | ||
4 | #define E820MAX 128 /* number of entries in E820MAP */ | ||
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 | |||
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 | #define E820_UNUSABLE 5 | ||
47 | |||
48 | /* reserved RAM used by kernel itself */ | ||
49 | #define E820_RESERVED_KERN 128 | ||
50 | |||
51 | #ifndef __ASSEMBLY__ | ||
52 | struct e820entry { | ||
53 | __u64 addr; /* start of memory segment */ | ||
54 | __u64 size; /* size of memory segment */ | ||
55 | __u32 type; /* type of memory segment */ | ||
56 | } __attribute__((packed)); | ||
57 | |||
58 | struct e820map { | ||
59 | __u32 nr_map; | ||
60 | struct e820entry map[E820_X_MAX]; | ||
61 | }; | ||
62 | |||
63 | #ifdef __KERNEL__ | ||
64 | /* see comment in arch/x86/kernel/e820.c */ | ||
65 | extern struct e820map e820; | ||
66 | extern struct e820map e820_saved; | ||
67 | |||
68 | extern unsigned long pci_mem_start; | ||
69 | extern int e820_any_mapped(u64 start, u64 end, unsigned type); | ||
70 | extern int e820_all_mapped(u64 start, u64 end, unsigned type); | ||
71 | extern void e820_add_region(u64 start, u64 size, int type); | ||
72 | extern void e820_print_map(char *who); | ||
73 | extern int | ||
74 | sanitize_e820_map(struct e820entry *biosmap, int max_nr_map, int *pnr_map); | ||
75 | extern u64 e820_update_range(u64 start, u64 size, unsigned old_type, | ||
76 | unsigned new_type); | ||
77 | extern u64 e820_remove_range(u64 start, u64 size, unsigned old_type, | ||
78 | int checktype); | ||
79 | extern void update_e820(void); | ||
80 | extern void e820_setup_gap(void); | ||
81 | extern int e820_search_gap(unsigned long *gapstart, unsigned long *gapsize, | ||
82 | unsigned long start_addr, unsigned long long end_addr); | ||
83 | struct setup_data; | ||
84 | extern void parse_e820_ext(struct setup_data *data, unsigned long pa_data); | ||
85 | |||
86 | #if defined(CONFIG_X86_64) || \ | ||
87 | (defined(CONFIG_X86_32) && defined(CONFIG_HIBERNATION)) | ||
88 | extern void e820_mark_nosave_regions(unsigned long limit_pfn); | ||
89 | #else | ||
90 | static inline void e820_mark_nosave_regions(unsigned long limit_pfn) | ||
91 | { | ||
92 | } | ||
93 | #endif | ||
94 | |||
95 | #ifdef CONFIG_MEMTEST | ||
96 | extern void early_memtest(unsigned long start, unsigned long end); | ||
97 | #else | ||
98 | static inline void early_memtest(unsigned long start, unsigned long end) | ||
99 | { | ||
100 | } | ||
101 | #endif | ||
102 | |||
103 | extern unsigned long end_user_pfn; | ||
104 | |||
105 | extern u64 find_e820_area(u64 start, u64 end, u64 size, u64 align); | ||
106 | extern u64 find_e820_area_size(u64 start, u64 *sizep, u64 align); | ||
107 | extern void reserve_early(u64 start, u64 end, char *name); | ||
108 | extern void reserve_early_overlap_ok(u64 start, u64 end, char *name); | ||
109 | extern void free_early(u64 start, u64 end); | ||
110 | extern void early_res_to_bootmem(u64 start, u64 end); | ||
111 | extern u64 early_reserve_e820(u64 startt, u64 sizet, u64 align); | ||
112 | |||
113 | extern unsigned long e820_end_of_ram_pfn(void); | ||
114 | extern unsigned long e820_end_of_low_ram_pfn(void); | ||
115 | extern int e820_find_active_region(const struct e820entry *ei, | ||
116 | unsigned long start_pfn, | ||
117 | unsigned long last_pfn, | ||
118 | unsigned long *ei_startpfn, | ||
119 | unsigned long *ei_endpfn); | ||
120 | extern void e820_register_active_regions(int nid, unsigned long start_pfn, | ||
121 | unsigned long end_pfn); | ||
122 | extern u64 e820_hole_size(u64 start, u64 end); | ||
123 | extern void finish_e820_parsing(void); | ||
124 | extern void e820_reserve_resources(void); | ||
125 | extern void e820_reserve_resources_late(void); | ||
126 | extern void setup_memory_map(void); | ||
127 | extern char *default_machine_specific_memory_setup(void); | ||
128 | extern char *machine_specific_memory_setup(void); | ||
129 | extern char *memory_setup(void); | ||
130 | #endif /* __KERNEL__ */ | ||
131 | #endif /* __ASSEMBLY__ */ | ||
132 | |||
133 | #define ISA_START_ADDRESS 0xa0000 | ||
134 | #define ISA_END_ADDRESS 0x100000 | ||
135 | #define is_ISA_range(s, e) ((s) >= ISA_START_ADDRESS && (e) < ISA_END_ADDRESS) | ||
136 | |||
137 | #define BIOS_BEGIN 0x000a0000 | ||
138 | #define BIOS_END 0x00100000 | ||
139 | |||
140 | #ifdef __KERNEL__ | ||
141 | #include <linux/ioport.h> | ||
142 | |||
143 | #define HIGH_MEMORY (1024*1024) | ||
144 | #endif /* __KERNEL__ */ | ||
145 | |||
146 | #endif /* ASM_X86__E820_H */ | ||