blob: 1dfd18f2cb62b7513f8430749964a47a97046723 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
#ifndef _UAPI_ASM_X86_E820_H
#define _UAPI_ASM_X86_E820_H
#define SMAP 0x534d4150 /* ASCII "SMAP" */
#define E820MAP 0x2d0 /* our map */
#define E820MAX 128 /* number of entries in E820MAP */
/*
* Legacy E820 BIOS limits us to 128 (E820MAX) nodes due to the
* constrained space in the zeropage. If we have more nodes than
* that, and if we've booted off EFI firmware, then the EFI tables
* passed us from the EFI firmware can list more nodes. Size our
* internal memory map tables to have room for these additional
* nodes, based on up to three entries per node for which the
* kernel was built: MAX_NUMNODES == (1 << CONFIG_NODES_SHIFT),
* plus E820MAX, allowing space for the possible duplicate E820
* entries that might need room in the same arrays, prior to the
* call to sanitize_e820_map() to remove duplicates. The allowance
* of three memory map entries per node is "enough" entries for
* the initial hardware platform motivating this mechanism to make
* use of additional EFI map entries. Future platforms may want
* to allow more than three entries per node or otherwise refine
* this size.
*/
#define E820_X_MAX E820MAX
#define E820NR 0x1e8 /* # entries in E820MAP */
#define E820_RAM 1
#define E820_RESERVED 2
#define E820_ACPI 3
#define E820_NVS 4
#define E820_UNUSABLE 5
/*
* reserved RAM used by kernel itself
* if CONFIG_INTEL_TXT is enabled, memory of this type will be
* included in the S3 integrity calculation and so should not include
* any memory that BIOS might alter over the S3 transition
*/
#define E820_RESERVED_KERN 128
struct e820entry {
uint64_t addr; /* start of memory segment */
uint64_t size; /* size of memory segment */
uint32_t type; /* type of memory segment */
} __attribute__((packed));
struct e820map {
uint32_t nr_map;
struct e820entry map[E820_X_MAX];
};
#define ISA_START_ADDRESS 0xa0000
#define ISA_END_ADDRESS 0x100000
#define BIOS_BEGIN 0x000a0000
#define BIOS_END 0x00100000
#define BIOS_ROM_BASE 0xffe00000
#define BIOS_ROM_END 0xffffffff
#endif /* _UAPI_ASM_X86_E820_H */
|
