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);