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
|
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2007,2008,2013 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/memory.h>
#include <grub/coreboot/lbio.h>
#include <grub/types.h>
#include <grub/err.h>
#include <grub/misc.h>
/* Context for grub_machine_mmap_iterate. */
struct grub_machine_mmap_iterate_ctx
{
grub_memory_hook_t hook;
void *hook_data;
};
#define GRUB_MACHINE_MEMORY_BADRAM 5
/* Helper for grub_machine_mmap_iterate. */
static int
iterate_linuxbios_table (grub_linuxbios_table_item_t table_item, void *data)
{
struct grub_machine_mmap_iterate_ctx *ctx = data;
mem_region_t mem_region;
if (table_item->tag != GRUB_LINUXBIOS_MEMBER_MEMORY)
return 0;
mem_region =
(mem_region_t) ((long) table_item +
sizeof (struct grub_linuxbios_table_item));
for (; (long) mem_region < (long) table_item + (long) table_item->size;
mem_region++)
{
grub_uint64_t start = mem_region->addr;
grub_uint64_t end = mem_region->addr + mem_region->size;
#ifdef __i386__
/* Mark region 0xa0000 - 0x100000 as reserved. */
if (start < 0x100000 && end >= 0xa0000
&& mem_region->type == GRUB_MACHINE_MEMORY_AVAILABLE)
{
if (start < 0xa0000
&& ctx->hook (start, 0xa0000 - start,
/* Multiboot mmaps match with the coreboot mmap
definition. Therefore, we can just pass type
through. */
mem_region->type,
ctx->hook_data))
return 1;
if (start < 0xa0000)
start = 0xa0000;
if (start >= end)
continue;
if (ctx->hook (start, (end > 0x100000 ? 0x100000 : end) - start,
GRUB_MEMORY_RESERVED,
ctx->hook_data))
return 1;
start = 0x100000;
if (end <= start)
continue;
}
#endif
if (ctx->hook (start, end - start,
/* Multiboot mmaps match with the coreboot mmap
definition. Therefore, we can just pass type
through. */
mem_region->type,
ctx->hook_data))
return 1;
}
return 0;
}
grub_err_t
grub_machine_mmap_iterate (grub_memory_hook_t hook, void *hook_data)
{
struct grub_machine_mmap_iterate_ctx ctx = { hook, hook_data };
grub_linuxbios_table_iterate (iterate_linuxbios_table, &ctx);
return 0;
}
|
