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
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
|
/*
* ARM kernel loader.
*
* Copyright (c) 2006-2007 CodeSourcery.
* Written by Paul Brook
*
* This code is licenced under the GPL.
*/
#include "hw.h"
#include "arm-misc.h"
#include "sysemu.h"
#define KERNEL_ARGS_ADDR 0x100
#define KERNEL_LOAD_ADDR 0x00010000
#define INITRD_LOAD_ADDR 0x00800000
/* The worlds second smallest bootloader. Set r0-r2, then jump to kernel. */
static uint32_t bootloader[] = {
0xe3a00000, /* mov r0, #0 */
0xe3a01000, /* mov r1, #0x?? */
0xe3811c00, /* orr r1, r1, #0x??00 */
0xe59f2000, /* ldr r2, [pc, #0] */
0xe59ff000, /* ldr pc, [pc, #0] */
0, /* Address of kernel args. Set by integratorcp_init. */
0 /* Kernel entry point. Set by integratorcp_init. */
};
/* Entry point for secondary CPUs. Enable interrupt controller and
Issue WFI until start address is written to system controller. */
static uint32_t smpboot[] = {
0xe3a00201, /* mov r0, #0x10000000 */
0xe3800601, /* orr r0, r0, #0x001000000 */
0xe3a01001, /* mov r1, #1 */
0xe5801100, /* str r1, [r0, #0x100] */
0xe3a00201, /* mov r0, #0x10000000 */
0xe3800030, /* orr r0, #0x30 */
0xe320f003, /* wfi */
0xe5901000, /* ldr r1, [r0] */
0xe3110003, /* tst r1, #3 */
0x1afffffb, /* bne <wfi> */
0xe12fff11 /* bx r1 */
};
static void main_cpu_reset(void *opaque)
{
CPUState *env = opaque;
cpu_reset(env);
if (env->boot_info)
arm_load_kernel(env, env->boot_info);
/* TODO: Reset secondary CPUs. */
}
static void set_kernel_args(struct arm_boot_info *info,
int initrd_size, void *base)
{
uint32_t *p;
p = (uint32_t *)(base + KERNEL_ARGS_ADDR);
/* ATAG_CORE */
stl_raw(p++, 5);
stl_raw(p++, 0x54410001);
stl_raw(p++, 1);
stl_raw(p++, 0x1000);
stl_raw(p++, 0);
/* ATAG_MEM */
/* TODO: handle multiple chips on one ATAG list */
stl_raw(p++, 4);
stl_raw(p++, 0x54410002);
stl_raw(p++, info->ram_size);
stl_raw(p++, info->loader_start);
if (initrd_size) {
/* ATAG_INITRD2 */
stl_raw(p++, 4);
stl_raw(p++, 0x54420005);
stl_raw(p++, info->loader_start + INITRD_LOAD_ADDR);
stl_raw(p++, initrd_size);
}
if (info->kernel_cmdline && *info->kernel_cmdline) {
/* ATAG_CMDLINE */
int cmdline_size;
cmdline_size = strlen(info->kernel_cmdline);
memcpy(p + 2, info->kernel_cmdline, cmdline_size + 1);
cmdline_size = (cmdline_size >> 2) + 1;
stl_raw(p++, cmdline_size + 2);
stl_raw(p++, 0x54410009);
p += cmdline_size;
}
if (info->atag_board) {
/* ATAG_BOARD */
int atag_board_len;
atag_board_len = (info->atag_board(info, p + 2) + 3) >> 2;
stl_raw(p++, 2 + atag_board_len);
stl_raw(p++, 0x414f4d50);
p += atag_board_len;
}
/* ATAG_END */
stl_raw(p++, 0);
stl_raw(p++, 0);
}
static void set_kernel_args_old(struct arm_boot_info *info,
int initrd_size, void *base)
{
uint32_t *p;
unsigned char *s;
/* see linux/include/asm-arm/setup.h */
p = (uint32_t *)(base + KERNEL_ARGS_ADDR);
/* page_size */
stl_raw(p++, 4096);
/* nr_pages */
stl_raw(p++, info->ram_size / 4096);
/* ramdisk_size */
stl_raw(p++, 0);
#define FLAG_READONLY 1
#define FLAG_RDLOAD 4
#define FLAG_RDPROMPT 8
/* flags */
stl_raw(p++, FLAG_READONLY | FLAG_RDLOAD | FLAG_RDPROMPT);
/* rootdev */
stl_raw(p++, (31 << 8) | 0); /* /dev/mtdblock0 */
/* video_num_cols */
stl_raw(p++, 0);
/* video_num_rows */
stl_raw(p++, 0);
/* video_x */
stl_raw(p++, 0);
/* video_y */
stl_raw(p++, 0);
/* memc_control_reg */
stl_raw(p++, 0);
/* unsigned char sounddefault */
/* unsigned char adfsdrives */
/* unsigned char bytes_per_char_h */
/* unsigned char bytes_per_char_v */
stl_raw(p++, 0);
/* pages_in_bank[4] */
stl_raw(p++, 0);
stl_raw(p++, 0);
stl_raw(p++, 0);
stl_raw(p++, 0);
/* pages_in_vram */
stl_raw(p++, 0);
/* initrd_start */
if (initrd_size)
stl_raw(p++, info->loader_start + INITRD_LOAD_ADDR);
else
stl_raw(p++, 0);
/* initrd_size */
stl_raw(p++, initrd_size);
/* rd_start */
stl_raw(p++, 0);
/* system_rev */
stl_raw(p++, 0);
/* system_serial_low */
stl_raw(p++, 0);
/* system_serial_high */
stl_raw(p++, 0);
/* mem_fclk_21285 */
stl_raw(p++, 0);
/* zero unused fields */
memset(p, 0, 256 + 1024 -
(p - ((uint32_t *)(base + KERNEL_ARGS_ADDR))));
s = base + KERNEL_ARGS_ADDR + 256 + 1024;
if (info->kernel_cmdline)
strcpy (s, info->kernel_cmdline);
else
stb_raw(s, 0);
}
void arm_load_kernel(CPUState *env, struct arm_boot_info *info)
{
int kernel_size;
int initrd_size;
int n;
int is_linux = 0;
uint64_t elf_entry;
target_ulong entry;
uint32_t pd;
void *loader_phys;
/* Load the kernel. */
if (!info->kernel_filename) {
fprintf(stderr, "Kernel image must be specified\n");
exit(1);
}
if (!env->boot_info) {
if (info->nb_cpus == 0)
info->nb_cpus = 1;
env->boot_info = info;
qemu_register_reset(main_cpu_reset, env);
}
pd = cpu_get_physical_page_desc(info->loader_start);
loader_phys = phys_ram_base + (pd & TARGET_PAGE_MASK) +
(info->loader_start & ~TARGET_PAGE_MASK);
/* Assume that raw images are linux kernels, and ELF images are not. */
kernel_size = load_elf(info->kernel_filename, 0, &elf_entry, NULL, NULL);
entry = elf_entry;
if (kernel_size < 0) {
kernel_size = load_uboot(info->kernel_filename, &entry, NULL,
&is_linux);
}
if (kernel_size < 0) {
kernel_size = load_image(info->kernel_filename,
loader_phys + KERNEL_LOAD_ADDR);
entry = info->loader_start + KERNEL_LOAD_ADDR;
is_linux = 1;
}
if (kernel_size < 0) {
fprintf(stderr, "qemu: could not load kernel '%s'\n",
info->kernel_filename);
exit(1);
}
if (!is_linux) {
/* Jump to the entry point. */
env->regs[15] = entry & 0xfffffffe;
env->thumb = entry & 1;
} else {
if (info->initrd_filename) {
initrd_size = load_image(info->initrd_filename,
loader_phys + INITRD_LOAD_ADDR);
if (initrd_size < 0) {
fprintf(stderr, "qemu: could not load initrd '%s'\n",
info->initrd_filename);
exit(1);
}
} else {
initrd_size = 0;
}
bootloader[1] |= info->board_id & 0xff;
bootloader[2] |= (info->board_id >> 8) & 0xff;
bootloader[5] = info->loader_start + KERNEL_ARGS_ADDR;
bootloader[6] = entry;
for (n = 0; n < sizeof(bootloader) / 4; n++)
stl_raw(loader_phys + (n * 4), bootloader[n]);
if (info->nb_cpus > 1)
for (n = 0; n < sizeof(smpboot) / 4; n++)
stl_raw(loader_phys + info->ram_size + (n * 4), smpboot[n]);
if (old_param)
set_kernel_args_old(info, initrd_size, loader_phys);
else
set_kernel_args(info, initrd_size, loader_phys);
}
}
|
