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
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
/*
* kexec: Linux boots Linux
*
* Copyright (C) 2003,2004 Eric Biederman (ebiederm@xmission.com)
*
* This program 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 (version 2 of the License).
*
* This program 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.
*
*/
#define _GNU_SOURCE
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <limits.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <unistd.h>
#include <x86/x86-linux.h>
#include "../../kexec.h"
#include "kexec-x86.h"
#include "x86-linux-setup.h"
void init_linux_parameters(struct x86_linux_param_header *real_mode)
{
/* Fill in the values that are usually provided by the kernel. */
/* Boot block magic */
memcpy(real_mode->header_magic, "HdrS", 4);
real_mode->protocol_version = 0x0203;
real_mode->initrd_addr_max = DEFAULT_INITRD_ADDR_MAX;
}
void setup_linux_bootloader_parameters(
struct kexec_info *info, struct x86_linux_param_header *real_mode,
unsigned long real_mode_base, unsigned long cmdline_offset,
const char *cmdline, off_t cmdline_len,
const unsigned char *initrd_buf, off_t initrd_size)
{
char *cmdline_ptr;
unsigned long initrd_base, initrd_addr_max;
/* Say I'm a boot loader */
real_mode->loader_type = LOADER_TYPE_UNKNOWN;
/* No loader flags */
real_mode->loader_flags = 0;
/* Find the maximum initial ramdisk address */
initrd_addr_max = DEFAULT_INITRD_ADDR_MAX;
if (real_mode->protocol_version >= 0x0203) {
initrd_addr_max = real_mode->initrd_addr_max;
}
/* Load the initrd if we have one */
if (initrd_buf) {
initrd_base = add_buffer(info,
initrd_buf, initrd_size, initrd_size,
4096, INITRD_BASE, initrd_addr_max, -1);
} else {
initrd_base = 0;
initrd_size = 0;
}
/* Ramdisk address and size */
real_mode->initrd_start = initrd_base;
real_mode->initrd_size = initrd_size;
/* The location of the command line */
/* if (real_mode_base == 0x90000) { */
real_mode->cl_magic = CL_MAGIC_VALUE;
real_mode->cl_offset = cmdline_offset;
/* setup_move_size */
/* } */
if (real_mode->protocol_version >= 0x0202) {
real_mode->cmd_line_ptr = real_mode_base + cmdline_offset;
}
/* Fill in the command line */
if (cmdline_len > COMMAND_LINE_SIZE) {
cmdline_len = COMMAND_LINE_SIZE;
}
cmdline_ptr = ((char *)real_mode) + cmdline_offset;
memcpy(cmdline_ptr, cmdline, cmdline_len);
cmdline_ptr[cmdline_len - 1] = '\0';
}
void setup_linux_system_parameters(struct x86_linux_param_header *real_mode,
unsigned long kexec_flags)
{
/* Fill in information the BIOS would usually provide */
struct memory_range *range;
int i, ranges;
/* Default screen size */
real_mode->orig_x = 0;
real_mode->orig_y = 0;
real_mode->orig_video_page = 0;
real_mode->orig_video_mode = 0;
real_mode->orig_video_cols = 80;
real_mode->orig_video_lines = 25;
real_mode->orig_video_ega_bx = 0;
real_mode->orig_video_isVGA = 1;
real_mode->orig_video_points = 16;
/* Fill in the memsize later */
real_mode->ext_mem_k = 0;
real_mode->alt_mem_k = 0;
real_mode->e820_map_nr = 0;
/* Default APM info */
memset(&real_mode->apm_bios_info, 0, sizeof(real_mode->apm_bios_info));
/* Default drive info */
memset(&real_mode->drive_info, 0, sizeof(real_mode->drive_info));
/* Default sysdesc table */
real_mode->sys_desc_table.length = 0;
/* default yes: this can be overridden on the command line */
real_mode->mount_root_rdonly = 0xFFFF;
/* default /dev/hda
* this can be overrident on the command line if necessary.
*/
real_mode->root_dev = (0x3 <<8)| 0;
/* another safe default */
real_mode->aux_device_info = 0;
/* Fill in the memory info */
if ((get_memory_ranges(&range, &ranges, kexec_flags) < 0) || ranges == 0) {
die("Cannot get memory information\n");
}
if (ranges > E820MAX) {
fprintf(stderr, "Too many memory ranges, truncating...\n");
ranges = E820MAX;
}
real_mode->e820_map_nr = ranges;
for(i = 0; i < ranges; i++) {
real_mode->e820_map[i].addr = range[i].start;
real_mode->e820_map[i].size = range[i].end - range[i].start;
switch (range[i].type) {
case RANGE_RAM:
real_mode->e820_map[i].type = E820_RAM;
break;
case RANGE_ACPI:
real_mode->e820_map[i].type = E820_ACPI;
break;
case RANGE_ACPI_NVS:
real_mode->e820_map[i].type = E820_NVS;
break;
default:
case RANGE_RESERVED:
real_mode->e820_map[i].type = E820_RESERVED;
break;
}
if (range[i].type != RANGE_RAM)
continue;
if ((range[i].start <= 0x100000) && range[i].end > 0x100000) {
unsigned long long mem_k = (range[i].end >> 10) - (0x100000 >> 10);
real_mode->ext_mem_k = mem_k;
real_mode->alt_mem_k = mem_k;
if (mem_k > 0xfc00) {
real_mode->ext_mem_k = 0xfc00; /* 64M */
}
if (mem_k > 0xffffffff) {
real_mode->alt_mem_k = 0xffffffff;
}
}
}
}
|
