blob: 8b0b202652bc521c40548ac082160bfe59f07f2b (
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
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
|
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2007,2008 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/machine/memory.h>
#include <grub/machine/lbio.h>
#include <grub/types.h>
#include <grub/err.h>
#include <grub/misc.h>
static grub_err_t
grub_linuxbios_table_iterate (int (*hook) (grub_linuxbios_table_item_t))
{
grub_linuxbios_table_header_t table_header;
grub_linuxbios_table_item_t table_item;
auto int check_signature (grub_linuxbios_table_header_t);
int check_signature (grub_linuxbios_table_header_t tbl_header)
{
if (! grub_memcmp (tbl_header->signature, "LBIO", 4))
return 1;
return 0;
}
/* Assuming table_header is aligned to its size (8 bytes). */
for (table_header = (grub_linuxbios_table_header_t) 0x500;
table_header < (grub_linuxbios_table_header_t) 0x1000; table_header++)
if (check_signature (table_header))
goto signature_found;
for (table_header = (grub_linuxbios_table_header_t) 0xf0000;
table_header < (grub_linuxbios_table_header_t) 0x100000; table_header++)
if (check_signature (table_header))
goto signature_found;
grub_fatal ("Could not find coreboot table\n");
signature_found:
table_item =
(grub_linuxbios_table_item_t) ((long) table_header +
(long) table_header->size);
for (; table_item->size;
table_item = (grub_linuxbios_table_item_t) ((long) table_item + (long) table_item->size))
{
if (table_item->tag == GRUB_LINUXBIOS_MEMBER_LINK
&& check_signature ((grub_linuxbios_table_header_t) (grub_addr_t)
*(grub_uint64_t *) (table_item + 1)))
{
table_header = (grub_linuxbios_table_header_t) (grub_addr_t)
*(grub_uint64_t *) (table_item + 1);
goto signature_found;
}
if (hook (table_item))
return 1;
}
return 0;
}
grub_err_t
grub_machine_mmap_iterate (grub_memory_hook_t hook)
{
mem_region_t mem_region;
auto int iterate_linuxbios_table (grub_linuxbios_table_item_t);
int iterate_linuxbios_table (grub_linuxbios_table_item_t table_item)
{
if (table_item->tag != GRUB_LINUXBIOS_MEMBER_MEMORY)
return 0;
mem_region =
(mem_region_t) ((long) table_item +
sizeof (struct grub_linuxbios_table_item));
while ((long) mem_region < (long) table_item + (long) table_item->size)
{
if (hook (mem_region->addr, mem_region->size,
/* Multiboot mmaps match with the coreboot mmap definition.
Therefore, we can just pass type through. */
mem_region->type))
return 1;
mem_region++;
}
return 0;
}
grub_linuxbios_table_iterate (iterate_linuxbios_table);
return 0;
}
|
