4 * Copyright (c) 2006 CodeSourcery.
5 * Written by Paul Brook
7 * This code is licenced under the GPL.
12 #define KERNEL_ARGS_ADDR 0x100
13 #define KERNEL_LOAD_ADDR 0x00010000
14 #define INITRD_LOAD_ADDR 0x00800000
16 /* The worlds second smallest bootloader. Set r0-r2, then jump to kernel. */
17 static uint32_t bootloader
[] = {
18 0xe3a00000, /* mov r0, #0 */
19 0xe3a01000, /* mov r1, #0x?? */
20 0xe3811c00, /* orr r1, r1, #0x??00 */
21 0xe59f2000, /* ldr r2, [pc, #0] */
22 0xe59ff000, /* ldr pc, [pc, #0] */
23 0, /* Address of kernel args. Set by integratorcp_init. */
24 0 /* Kernel entry point. Set by integratorcp_init. */
27 static void main_cpu_reset(void *opaque
)
29 CPUState
*env
= opaque
;
32 if (env
->kernel_filename
)
33 arm_load_kernel(env
, env
->ram_size
, env
->kernel_filename
,
34 env
->kernel_cmdline
, env
->initrd_filename
,
35 env
->board_id
, env
->loader_start
);
38 static void set_kernel_args(uint32_t ram_size
, int initrd_size
,
39 const char *kernel_cmdline
,
40 target_phys_addr_t loader_start
)
44 p
= (uint32_t *)(phys_ram_base
+ KERNEL_ARGS_ADDR
);
47 stl_raw(p
++, 0x54410001);
53 stl_raw(p
++, 0x54410002);
54 stl_raw(p
++, ram_size
);
55 stl_raw(p
++, loader_start
);
59 stl_raw(p
++, 0x54420005);
60 stl_raw(p
++, loader_start
+ INITRD_LOAD_ADDR
);
61 stl_raw(p
++, initrd_size
);
63 if (kernel_cmdline
&& *kernel_cmdline
) {
67 cmdline_size
= strlen(kernel_cmdline
);
68 memcpy (p
+ 2, kernel_cmdline
, cmdline_size
+ 1);
69 cmdline_size
= (cmdline_size
>> 2) + 1;
70 stl_raw(p
++, cmdline_size
+ 2);
71 stl_raw(p
++, 0x54410009);
79 static void set_kernel_args_old(uint32_t ram_size
, int initrd_size
,
80 const char *kernel_cmdline
,
81 target_phys_addr_t loader_start
)
86 /* see linux/include/asm-arm/setup.h */
87 p
= (uint32_t *)(phys_ram_base
+ KERNEL_ARGS_ADDR
);
91 stl_raw(p
++, ram_size
/ 4096);
94 #define FLAG_READONLY 1
96 #define FLAG_RDPROMPT 8
98 stl_raw(p
++, FLAG_READONLY
| FLAG_RDLOAD
| FLAG_RDPROMPT
);
100 stl_raw(p
++, (31 << 8) | 0); /* /dev/mtdblock0 */
109 /* memc_control_reg */
111 /* unsigned char sounddefault */
112 /* unsigned char adfsdrives */
113 /* unsigned char bytes_per_char_h */
114 /* unsigned char bytes_per_char_v */
116 /* pages_in_bank[4] */
125 stl_raw(p
++, loader_start
+ INITRD_LOAD_ADDR
);
129 stl_raw(p
++, initrd_size
);
134 /* system_serial_low */
136 /* system_serial_high */
140 /* zero unused fields */
141 memset(p
, 0, 256 + 1024 -
142 (p
- ((uint32_t *)(phys_ram_base
+ KERNEL_ARGS_ADDR
))));
143 s
= phys_ram_base
+ KERNEL_ARGS_ADDR
+ 256 + 1024;
145 strcpy (s
, kernel_cmdline
);
150 void arm_load_kernel(CPUState
*env
, int ram_size
, const char *kernel_filename
,
151 const char *kernel_cmdline
, const char *initrd_filename
,
152 int board_id
, target_phys_addr_t loader_start
)
161 /* Load the kernel. */
162 if (!kernel_filename
) {
163 fprintf(stderr
, "Kernel image must be specified\n");
167 if (!env
->kernel_filename
) {
168 env
->ram_size
= ram_size
;
169 env
->kernel_filename
= kernel_filename
;
170 env
->kernel_cmdline
= kernel_cmdline
;
171 env
->initrd_filename
= initrd_filename
;
172 env
->board_id
= board_id
;
173 env
->loader_start
= loader_start
;
174 qemu_register_reset(main_cpu_reset
, env
);
176 /* Assume that raw images are linux kernels, and ELF images are not. */
177 kernel_size
= load_elf(kernel_filename
, 0, &elf_entry
, NULL
, NULL
);
179 if (kernel_size
< 0) {
180 kernel_size
= load_uboot(kernel_filename
, &entry
, &is_linux
);
182 if (kernel_size
< 0) {
183 kernel_size
= load_image(kernel_filename
,
184 phys_ram_base
+ KERNEL_LOAD_ADDR
);
185 entry
= loader_start
+ KERNEL_LOAD_ADDR
;
188 if (kernel_size
< 0) {
189 fprintf(stderr
, "qemu: could not load kernel '%s'\n", kernel_filename
);
193 /* Jump to the entry point. */
194 env
->regs
[15] = entry
& 0xfffffffe;
195 env
->thumb
= entry
& 1;
197 if (initrd_filename
) {
198 initrd_size
= load_image(initrd_filename
,
199 phys_ram_base
+ INITRD_LOAD_ADDR
);
200 if (initrd_size
< 0) {
201 fprintf(stderr
, "qemu: could not load initrd '%s'\n",
208 bootloader
[1] |= board_id
& 0xff;
209 bootloader
[2] |= (board_id
>> 8) & 0xff;
210 bootloader
[5] = loader_start
+ KERNEL_ARGS_ADDR
;
211 bootloader
[6] = entry
;
212 for (n
= 0; n
< sizeof(bootloader
) / 4; n
++)
213 stl_raw(phys_ram_base
+ (n
* 4), bootloader
[n
]);
215 set_kernel_args_old(ram_size
, initrd_size
,
216 kernel_cmdline
, loader_start
);
218 set_kernel_args(ram_size
, initrd_size
,
219 kernel_cmdline
, loader_start
);