Avoid running audio ctl's when vm is not running
[qemu/mdroth.git] / hw / arm_boot.c
blobcf9616ae0bb988a09084ef2d8002c5e5a5810d9c
1 /*
2 * ARM kernel loader.
4 * Copyright (c) 2006-2007 CodeSourcery.
5 * Written by Paul Brook
7 * This code is licenced under the GPL.
8 */
10 #include "hw.h"
11 #include "arm-misc.h"
12 #include "sysemu.h"
14 #define KERNEL_ARGS_ADDR 0x100
15 #define KERNEL_LOAD_ADDR 0x00010000
16 #define INITRD_LOAD_ADDR 0x00800000
18 /* The worlds second smallest bootloader. Set r0-r2, then jump to kernel. */
19 static uint32_t bootloader[] = {
20 0xe3a00000, /* mov r0, #0 */
21 0xe3a01000, /* mov r1, #0x?? */
22 0xe3811c00, /* orr r1, r1, #0x??00 */
23 0xe59f2000, /* ldr r2, [pc, #0] */
24 0xe59ff000, /* ldr pc, [pc, #0] */
25 0, /* Address of kernel args. Set by integratorcp_init. */
26 0 /* Kernel entry point. Set by integratorcp_init. */
29 /* Entry point for secondary CPUs. Enable interrupt controller and
30 Issue WFI until start address is written to system controller. */
31 static uint32_t smpboot[] = {
32 0xe3a00201, /* mov r0, #0x10000000 */
33 0xe3800601, /* orr r0, r0, #0x001000000 */
34 0xe3a01001, /* mov r1, #1 */
35 0xe5801100, /* str r1, [r0, #0x100] */
36 0xe3a00201, /* mov r0, #0x10000000 */
37 0xe3800030, /* orr r0, #0x30 */
38 0xe320f003, /* wfi */
39 0xe5901000, /* ldr r1, [r0] */
40 0xe3110003, /* tst r1, #3 */
41 0x1afffffb, /* bne <wfi> */
42 0xe12fff11 /* bx r1 */
45 static void main_cpu_reset(void *opaque)
47 CPUState *env = opaque;
49 cpu_reset(env);
50 if (env->boot_info)
51 arm_load_kernel(env, env->boot_info);
53 /* TODO: Reset secondary CPUs. */
56 static void set_kernel_args(struct arm_boot_info *info,
57 int initrd_size, void *base)
59 uint32_t *p;
61 p = (uint32_t *)(base + KERNEL_ARGS_ADDR);
62 /* ATAG_CORE */
63 stl_raw(p++, 5);
64 stl_raw(p++, 0x54410001);
65 stl_raw(p++, 1);
66 stl_raw(p++, 0x1000);
67 stl_raw(p++, 0);
68 /* ATAG_MEM */
69 /* TODO: handle multiple chips on one ATAG list */
70 stl_raw(p++, 4);
71 stl_raw(p++, 0x54410002);
72 stl_raw(p++, info->ram_size);
73 stl_raw(p++, info->loader_start);
74 if (initrd_size) {
75 /* ATAG_INITRD2 */
76 stl_raw(p++, 4);
77 stl_raw(p++, 0x54420005);
78 stl_raw(p++, info->loader_start + INITRD_LOAD_ADDR);
79 stl_raw(p++, initrd_size);
81 if (info->kernel_cmdline && *info->kernel_cmdline) {
82 /* ATAG_CMDLINE */
83 int cmdline_size;
85 cmdline_size = strlen(info->kernel_cmdline);
86 memcpy(p + 2, info->kernel_cmdline, cmdline_size + 1);
87 cmdline_size = (cmdline_size >> 2) + 1;
88 stl_raw(p++, cmdline_size + 2);
89 stl_raw(p++, 0x54410009);
90 p += cmdline_size;
92 if (info->atag_board) {
93 /* ATAG_BOARD */
94 int atag_board_len;
96 atag_board_len = (info->atag_board(info, p + 2) + 3) >> 2;
97 stl_raw(p++, 2 + atag_board_len);
98 stl_raw(p++, 0x414f4d50);
99 p += atag_board_len;
101 /* ATAG_END */
102 stl_raw(p++, 0);
103 stl_raw(p++, 0);
106 static void set_kernel_args_old(struct arm_boot_info *info,
107 int initrd_size, void *base)
109 uint32_t *p;
110 unsigned char *s;
112 /* see linux/include/asm-arm/setup.h */
113 p = (uint32_t *)(base + KERNEL_ARGS_ADDR);
114 /* page_size */
115 stl_raw(p++, 4096);
116 /* nr_pages */
117 stl_raw(p++, info->ram_size / 4096);
118 /* ramdisk_size */
119 stl_raw(p++, 0);
120 #define FLAG_READONLY 1
121 #define FLAG_RDLOAD 4
122 #define FLAG_RDPROMPT 8
123 /* flags */
124 stl_raw(p++, FLAG_READONLY | FLAG_RDLOAD | FLAG_RDPROMPT);
125 /* rootdev */
126 stl_raw(p++, (31 << 8) | 0); /* /dev/mtdblock0 */
127 /* video_num_cols */
128 stl_raw(p++, 0);
129 /* video_num_rows */
130 stl_raw(p++, 0);
131 /* video_x */
132 stl_raw(p++, 0);
133 /* video_y */
134 stl_raw(p++, 0);
135 /* memc_control_reg */
136 stl_raw(p++, 0);
137 /* unsigned char sounddefault */
138 /* unsigned char adfsdrives */
139 /* unsigned char bytes_per_char_h */
140 /* unsigned char bytes_per_char_v */
141 stl_raw(p++, 0);
142 /* pages_in_bank[4] */
143 stl_raw(p++, 0);
144 stl_raw(p++, 0);
145 stl_raw(p++, 0);
146 stl_raw(p++, 0);
147 /* pages_in_vram */
148 stl_raw(p++, 0);
149 /* initrd_start */
150 if (initrd_size)
151 stl_raw(p++, info->loader_start + INITRD_LOAD_ADDR);
152 else
153 stl_raw(p++, 0);
154 /* initrd_size */
155 stl_raw(p++, initrd_size);
156 /* rd_start */
157 stl_raw(p++, 0);
158 /* system_rev */
159 stl_raw(p++, 0);
160 /* system_serial_low */
161 stl_raw(p++, 0);
162 /* system_serial_high */
163 stl_raw(p++, 0);
164 /* mem_fclk_21285 */
165 stl_raw(p++, 0);
166 /* zero unused fields */
167 memset(p, 0, 256 + 1024 -
168 (p - ((uint32_t *)(base + KERNEL_ARGS_ADDR))));
169 s = base + KERNEL_ARGS_ADDR + 256 + 1024;
170 if (info->kernel_cmdline)
171 strcpy (s, info->kernel_cmdline);
172 else
173 stb_raw(s, 0);
176 void arm_load_kernel(CPUState *env, struct arm_boot_info *info)
178 int kernel_size;
179 int initrd_size;
180 int n;
181 int is_linux = 0;
182 uint64_t elf_entry;
183 target_ulong entry;
184 uint32_t pd;
185 void *loader_phys;
187 /* Load the kernel. */
188 if (!info->kernel_filename) {
189 fprintf(stderr, "Kernel image must be specified\n");
190 exit(1);
193 if (!env->boot_info) {
194 if (info->nb_cpus == 0)
195 info->nb_cpus = 1;
196 env->boot_info = info;
197 qemu_register_reset(main_cpu_reset, env);
200 pd = cpu_get_physical_page_desc(info->loader_start);
201 loader_phys = phys_ram_base + (pd & TARGET_PAGE_MASK) +
202 (info->loader_start & ~TARGET_PAGE_MASK);
204 /* Assume that raw images are linux kernels, and ELF images are not. */
205 kernel_size = load_elf(info->kernel_filename, 0, &elf_entry, NULL, NULL);
206 entry = elf_entry;
207 if (kernel_size < 0) {
208 kernel_size = load_uimage(info->kernel_filename, &entry, NULL,
209 &is_linux);
211 if (kernel_size < 0) {
212 kernel_size = load_image(info->kernel_filename,
213 loader_phys + KERNEL_LOAD_ADDR);
214 entry = info->loader_start + KERNEL_LOAD_ADDR;
215 is_linux = 1;
217 if (kernel_size < 0) {
218 fprintf(stderr, "qemu: could not load kernel '%s'\n",
219 info->kernel_filename);
220 exit(1);
222 if (!is_linux) {
223 /* Jump to the entry point. */
224 env->regs[15] = entry & 0xfffffffe;
225 env->thumb = entry & 1;
226 } else {
227 if (info->initrd_filename) {
228 initrd_size = load_image(info->initrd_filename,
229 loader_phys + INITRD_LOAD_ADDR);
230 if (initrd_size < 0) {
231 fprintf(stderr, "qemu: could not load initrd '%s'\n",
232 info->initrd_filename);
233 exit(1);
235 } else {
236 initrd_size = 0;
238 bootloader[1] |= info->board_id & 0xff;
239 bootloader[2] |= (info->board_id >> 8) & 0xff;
240 bootloader[5] = info->loader_start + KERNEL_ARGS_ADDR;
241 bootloader[6] = entry;
242 for (n = 0; n < sizeof(bootloader) / 4; n++)
243 stl_raw(loader_phys + (n * 4), bootloader[n]);
244 if (info->nb_cpus > 1)
245 for (n = 0; n < sizeof(smpboot) / 4; n++)
246 stl_raw(loader_phys + info->ram_size + (n * 4), smpboot[n]);
247 if (old_param)
248 set_kernel_args_old(info, initrd_size, loader_phys);
249 else
250 set_kernel_args(info, initrd_size, loader_phys);