root / hw / arm_boot.c @ 28366c3a
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1 | 5fafdf24 | ths | /*
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2 | 16406950 | pbrook | * ARM kernel loader.
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3 | 16406950 | pbrook | *
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4 | 9ee6e8bb | pbrook | * Copyright (c) 2006-2007 CodeSourcery.
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5 | 16406950 | pbrook | * Written by Paul Brook
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6 | 16406950 | pbrook | *
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7 | 16406950 | pbrook | * This code is licenced under the GPL.
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8 | 16406950 | pbrook | */
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9 | 16406950 | pbrook | |
10 | 87ecb68b | pbrook | #include "hw.h" |
11 | 87ecb68b | pbrook | #include "arm-misc.h" |
12 | 87ecb68b | pbrook | #include "sysemu.h" |
13 | ca20cf32 | Blue Swirl | #include "loader.h" |
14 | ca20cf32 | Blue Swirl | #include "elf.h" |
15 | 16406950 | pbrook | |
16 | 16406950 | pbrook | #define KERNEL_ARGS_ADDR 0x100 |
17 | 16406950 | pbrook | #define KERNEL_LOAD_ADDR 0x00010000 |
18 | 16406950 | pbrook | #define INITRD_LOAD_ADDR 0x00800000 |
19 | 16406950 | pbrook | |
20 | 16406950 | pbrook | /* The worlds second smallest bootloader. Set r0-r2, then jump to kernel. */
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21 | 16406950 | pbrook | static uint32_t bootloader[] = {
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22 | 16406950 | pbrook | 0xe3a00000, /* mov r0, #0 */ |
23 | 16406950 | pbrook | 0xe3a01000, /* mov r1, #0x?? */ |
24 | 16406950 | pbrook | 0xe3811c00, /* orr r1, r1, #0x??00 */ |
25 | 16406950 | pbrook | 0xe59f2000, /* ldr r2, [pc, #0] */ |
26 | 16406950 | pbrook | 0xe59ff000, /* ldr pc, [pc, #0] */ |
27 | 16406950 | pbrook | 0, /* Address of kernel args. Set by integratorcp_init. */ |
28 | 16406950 | pbrook | 0 /* Kernel entry point. Set by integratorcp_init. */ |
29 | 16406950 | pbrook | }; |
30 | 16406950 | pbrook | |
31 | 9ee6e8bb | pbrook | /* Entry point for secondary CPUs. Enable interrupt controller and
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32 | 9ee6e8bb | pbrook | Issue WFI until start address is written to system controller. */
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33 | 9ee6e8bb | pbrook | static uint32_t smpboot[] = {
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34 | 9ee6e8bb | pbrook | 0xe3a00201, /* mov r0, #0x10000000 */ |
35 | 9ee6e8bb | pbrook | 0xe3800601, /* orr r0, r0, #0x001000000 */ |
36 | 9ee6e8bb | pbrook | 0xe3a01001, /* mov r1, #1 */ |
37 | 9ee6e8bb | pbrook | 0xe5801100, /* str r1, [r0, #0x100] */ |
38 | 9ee6e8bb | pbrook | 0xe3a00201, /* mov r0, #0x10000000 */ |
39 | 9ee6e8bb | pbrook | 0xe3800030, /* orr r0, #0x30 */ |
40 | 9ee6e8bb | pbrook | 0xe320f003, /* wfi */ |
41 | 9ee6e8bb | pbrook | 0xe5901000, /* ldr r1, [r0] */ |
42 | 9ee6e8bb | pbrook | 0xe3110003, /* tst r1, #3 */ |
43 | 9ee6e8bb | pbrook | 0x1afffffb, /* bne <wfi> */ |
44 | 9ee6e8bb | pbrook | 0xe12fff11 /* bx r1 */ |
45 | 9ee6e8bb | pbrook | }; |
46 | 9ee6e8bb | pbrook | |
47 | f3d6b95e | pbrook | static void main_cpu_reset(void *opaque) |
48 | f3d6b95e | pbrook | { |
49 | f3d6b95e | pbrook | CPUState *env = opaque; |
50 | f3d6b95e | pbrook | |
51 | f3d6b95e | pbrook | cpu_reset(env); |
52 | f93eb9ff | balrog | if (env->boot_info)
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53 | f93eb9ff | balrog | arm_load_kernel(env, env->boot_info); |
54 | 9ee6e8bb | pbrook | |
55 | 9ee6e8bb | pbrook | /* TODO: Reset secondary CPUs. */
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56 | f3d6b95e | pbrook | } |
57 | f3d6b95e | pbrook | |
58 | 52b43737 | pbrook | #define WRITE_WORD(p, value) do { \ |
59 | 52b43737 | pbrook | stl_phys_notdirty(p, value); \ |
60 | 52b43737 | pbrook | p += 4; \
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61 | 52b43737 | pbrook | } while (0) |
62 | 52b43737 | pbrook | |
63 | f93eb9ff | balrog | static void set_kernel_args(struct arm_boot_info *info, |
64 | c227f099 | Anthony Liguori | int initrd_size, target_phys_addr_t base)
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65 | 16406950 | pbrook | { |
66 | c227f099 | Anthony Liguori | target_phys_addr_t p; |
67 | 16406950 | pbrook | |
68 | 52b43737 | pbrook | p = base + KERNEL_ARGS_ADDR; |
69 | 16406950 | pbrook | /* ATAG_CORE */
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70 | 52b43737 | pbrook | WRITE_WORD(p, 5);
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71 | 52b43737 | pbrook | WRITE_WORD(p, 0x54410001);
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72 | 52b43737 | pbrook | WRITE_WORD(p, 1);
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73 | 52b43737 | pbrook | WRITE_WORD(p, 0x1000);
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74 | 52b43737 | pbrook | WRITE_WORD(p, 0);
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75 | 16406950 | pbrook | /* ATAG_MEM */
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76 | f93eb9ff | balrog | /* TODO: handle multiple chips on one ATAG list */
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77 | 52b43737 | pbrook | WRITE_WORD(p, 4);
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78 | 52b43737 | pbrook | WRITE_WORD(p, 0x54410002);
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79 | 52b43737 | pbrook | WRITE_WORD(p, info->ram_size); |
80 | 52b43737 | pbrook | WRITE_WORD(p, info->loader_start); |
81 | 16406950 | pbrook | if (initrd_size) {
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82 | 16406950 | pbrook | /* ATAG_INITRD2 */
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83 | 52b43737 | pbrook | WRITE_WORD(p, 4);
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84 | 52b43737 | pbrook | WRITE_WORD(p, 0x54420005);
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85 | 52b43737 | pbrook | WRITE_WORD(p, info->loader_start + INITRD_LOAD_ADDR); |
86 | 52b43737 | pbrook | WRITE_WORD(p, initrd_size); |
87 | 16406950 | pbrook | } |
88 | f93eb9ff | balrog | if (info->kernel_cmdline && *info->kernel_cmdline) {
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89 | 16406950 | pbrook | /* ATAG_CMDLINE */
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90 | 16406950 | pbrook | int cmdline_size;
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91 | 16406950 | pbrook | |
92 | f93eb9ff | balrog | cmdline_size = strlen(info->kernel_cmdline); |
93 | 52b43737 | pbrook | cpu_physical_memory_write(p + 8, (void *)info->kernel_cmdline, |
94 | 52b43737 | pbrook | cmdline_size + 1);
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95 | 16406950 | pbrook | cmdline_size = (cmdline_size >> 2) + 1; |
96 | 52b43737 | pbrook | WRITE_WORD(p, cmdline_size + 2);
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97 | 52b43737 | pbrook | WRITE_WORD(p, 0x54410009);
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98 | 52b43737 | pbrook | p += cmdline_size * 4;
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99 | 16406950 | pbrook | } |
100 | f93eb9ff | balrog | if (info->atag_board) {
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101 | f93eb9ff | balrog | /* ATAG_BOARD */
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102 | f93eb9ff | balrog | int atag_board_len;
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103 | 52b43737 | pbrook | uint8_t atag_board_buf[0x1000];
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104 | f93eb9ff | balrog | |
105 | 52b43737 | pbrook | atag_board_len = (info->atag_board(info, atag_board_buf) + 3) & ~3; |
106 | 52b43737 | pbrook | WRITE_WORD(p, (atag_board_len + 8) >> 2); |
107 | 52b43737 | pbrook | WRITE_WORD(p, 0x414f4d50);
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108 | 52b43737 | pbrook | cpu_physical_memory_write(p, atag_board_buf, atag_board_len); |
109 | f93eb9ff | balrog | p += atag_board_len; |
110 | f93eb9ff | balrog | } |
111 | 16406950 | pbrook | /* ATAG_END */
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112 | 52b43737 | pbrook | WRITE_WORD(p, 0);
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113 | 52b43737 | pbrook | WRITE_WORD(p, 0);
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114 | 16406950 | pbrook | } |
115 | 16406950 | pbrook | |
116 | f93eb9ff | balrog | static void set_kernel_args_old(struct arm_boot_info *info, |
117 | c227f099 | Anthony Liguori | int initrd_size, target_phys_addr_t base)
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118 | 2b8f2d41 | balrog | { |
119 | c227f099 | Anthony Liguori | target_phys_addr_t p; |
120 | 52b43737 | pbrook | const char *s; |
121 | 52b43737 | pbrook | |
122 | 2b8f2d41 | balrog | |
123 | 2b8f2d41 | balrog | /* see linux/include/asm-arm/setup.h */
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124 | 52b43737 | pbrook | p = base + KERNEL_ARGS_ADDR; |
125 | 2b8f2d41 | balrog | /* page_size */
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126 | 52b43737 | pbrook | WRITE_WORD(p, 4096);
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127 | 2b8f2d41 | balrog | /* nr_pages */
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128 | 52b43737 | pbrook | WRITE_WORD(p, info->ram_size / 4096);
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129 | 2b8f2d41 | balrog | /* ramdisk_size */
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130 | 52b43737 | pbrook | WRITE_WORD(p, 0);
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131 | 2b8f2d41 | balrog | #define FLAG_READONLY 1 |
132 | 2b8f2d41 | balrog | #define FLAG_RDLOAD 4 |
133 | 2b8f2d41 | balrog | #define FLAG_RDPROMPT 8 |
134 | 2b8f2d41 | balrog | /* flags */
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135 | 52b43737 | pbrook | WRITE_WORD(p, FLAG_READONLY | FLAG_RDLOAD | FLAG_RDPROMPT); |
136 | 2b8f2d41 | balrog | /* rootdev */
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137 | 52b43737 | pbrook | WRITE_WORD(p, (31 << 8) | 0); /* /dev/mtdblock0 */ |
138 | 2b8f2d41 | balrog | /* video_num_cols */
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139 | 52b43737 | pbrook | WRITE_WORD(p, 0);
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140 | 2b8f2d41 | balrog | /* video_num_rows */
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141 | 52b43737 | pbrook | WRITE_WORD(p, 0);
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142 | 2b8f2d41 | balrog | /* video_x */
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143 | 52b43737 | pbrook | WRITE_WORD(p, 0);
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144 | 2b8f2d41 | balrog | /* video_y */
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145 | 52b43737 | pbrook | WRITE_WORD(p, 0);
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146 | 2b8f2d41 | balrog | /* memc_control_reg */
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147 | 52b43737 | pbrook | WRITE_WORD(p, 0);
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148 | 2b8f2d41 | balrog | /* unsigned char sounddefault */
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149 | 2b8f2d41 | balrog | /* unsigned char adfsdrives */
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150 | 2b8f2d41 | balrog | /* unsigned char bytes_per_char_h */
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151 | 2b8f2d41 | balrog | /* unsigned char bytes_per_char_v */
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152 | 52b43737 | pbrook | WRITE_WORD(p, 0);
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153 | 2b8f2d41 | balrog | /* pages_in_bank[4] */
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154 | 52b43737 | pbrook | WRITE_WORD(p, 0);
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155 | 52b43737 | pbrook | WRITE_WORD(p, 0);
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156 | 52b43737 | pbrook | WRITE_WORD(p, 0);
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157 | 52b43737 | pbrook | WRITE_WORD(p, 0);
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158 | 2b8f2d41 | balrog | /* pages_in_vram */
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159 | 52b43737 | pbrook | WRITE_WORD(p, 0);
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160 | 2b8f2d41 | balrog | /* initrd_start */
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161 | 2b8f2d41 | balrog | if (initrd_size)
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162 | 52b43737 | pbrook | WRITE_WORD(p, info->loader_start + INITRD_LOAD_ADDR); |
163 | 2b8f2d41 | balrog | else
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164 | 52b43737 | pbrook | WRITE_WORD(p, 0);
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165 | 2b8f2d41 | balrog | /* initrd_size */
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166 | 52b43737 | pbrook | WRITE_WORD(p, initrd_size); |
167 | 2b8f2d41 | balrog | /* rd_start */
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168 | 52b43737 | pbrook | WRITE_WORD(p, 0);
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169 | 2b8f2d41 | balrog | /* system_rev */
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170 | 52b43737 | pbrook | WRITE_WORD(p, 0);
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171 | 2b8f2d41 | balrog | /* system_serial_low */
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172 | 52b43737 | pbrook | WRITE_WORD(p, 0);
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173 | 2b8f2d41 | balrog | /* system_serial_high */
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174 | 52b43737 | pbrook | WRITE_WORD(p, 0);
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175 | 2b8f2d41 | balrog | /* mem_fclk_21285 */
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176 | 52b43737 | pbrook | WRITE_WORD(p, 0);
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177 | 2b8f2d41 | balrog | /* zero unused fields */
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178 | 52b43737 | pbrook | while (p < base + KERNEL_ARGS_ADDR + 256 + 1024) { |
179 | 52b43737 | pbrook | WRITE_WORD(p, 0);
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180 | 52b43737 | pbrook | } |
181 | 52b43737 | pbrook | s = info->kernel_cmdline; |
182 | 52b43737 | pbrook | if (s) {
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183 | 52b43737 | pbrook | cpu_physical_memory_write(p, (void *)s, strlen(s) + 1); |
184 | 52b43737 | pbrook | } else {
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185 | 52b43737 | pbrook | WRITE_WORD(p, 0);
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186 | 52b43737 | pbrook | } |
187 | 2b8f2d41 | balrog | } |
188 | 2b8f2d41 | balrog | |
189 | f93eb9ff | balrog | void arm_load_kernel(CPUState *env, struct arm_boot_info *info) |
190 | 16406950 | pbrook | { |
191 | 16406950 | pbrook | int kernel_size;
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192 | 16406950 | pbrook | int initrd_size;
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193 | 16406950 | pbrook | int n;
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194 | 1c7b3754 | pbrook | int is_linux = 0; |
195 | 1c7b3754 | pbrook | uint64_t elf_entry; |
196 | c227f099 | Anthony Liguori | target_phys_addr_t entry; |
197 | ca20cf32 | Blue Swirl | int big_endian;
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198 | 16406950 | pbrook | |
199 | 16406950 | pbrook | /* Load the kernel. */
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200 | f93eb9ff | balrog | if (!info->kernel_filename) {
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201 | 16406950 | pbrook | fprintf(stderr, "Kernel image must be specified\n");
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202 | 16406950 | pbrook | exit(1);
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203 | 16406950 | pbrook | } |
204 | daf90626 | pbrook | |
205 | f93eb9ff | balrog | if (!env->boot_info) {
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206 | f93eb9ff | balrog | if (info->nb_cpus == 0) |
207 | f93eb9ff | balrog | info->nb_cpus = 1;
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208 | f93eb9ff | balrog | env->boot_info = info; |
209 | a08d4367 | Jan Kiszka | qemu_register_reset(main_cpu_reset, env); |
210 | f3d6b95e | pbrook | } |
211 | f93eb9ff | balrog | |
212 | ca20cf32 | Blue Swirl | #ifdef TARGET_WORDS_BIGENDIAN
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213 | ca20cf32 | Blue Swirl | big_endian = 1;
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214 | ca20cf32 | Blue Swirl | #else
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215 | ca20cf32 | Blue Swirl | big_endian = 0;
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216 | ca20cf32 | Blue Swirl | #endif
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217 | ca20cf32 | Blue Swirl | |
218 | 1c7b3754 | pbrook | /* Assume that raw images are linux kernels, and ELF images are not. */
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219 | ca20cf32 | Blue Swirl | kernel_size = load_elf(info->kernel_filename, 0, &elf_entry, NULL, NULL, |
220 | ca20cf32 | Blue Swirl | big_endian, ELF_MACHINE, 1);
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221 | 1c7b3754 | pbrook | entry = elf_entry; |
222 | 1c7b3754 | pbrook | if (kernel_size < 0) { |
223 | 5a9154e0 | aliguori | kernel_size = load_uimage(info->kernel_filename, &entry, NULL,
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224 | 5a9154e0 | aliguori | &is_linux); |
225 | 1c7b3754 | pbrook | } |
226 | 1c7b3754 | pbrook | if (kernel_size < 0) { |
227 | f93eb9ff | balrog | entry = info->loader_start + KERNEL_LOAD_ADDR; |
228 | 3b760e04 | pbrook | kernel_size = load_image_targphys(info->kernel_filename, entry, |
229 | 3b760e04 | pbrook | ram_size - KERNEL_LOAD_ADDR); |
230 | 1c7b3754 | pbrook | is_linux = 1;
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231 | 1c7b3754 | pbrook | } |
232 | 1c7b3754 | pbrook | if (kernel_size < 0) { |
233 | f93eb9ff | balrog | fprintf(stderr, "qemu: could not load kernel '%s'\n",
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234 | f93eb9ff | balrog | info->kernel_filename); |
235 | 1c7b3754 | pbrook | exit(1);
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236 | 1c7b3754 | pbrook | } |
237 | 1c7b3754 | pbrook | if (!is_linux) {
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238 | 1c7b3754 | pbrook | /* Jump to the entry point. */
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239 | daf90626 | pbrook | env->regs[15] = entry & 0xfffffffe; |
240 | daf90626 | pbrook | env->thumb = entry & 1;
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241 | daf90626 | pbrook | } else {
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242 | f93eb9ff | balrog | if (info->initrd_filename) {
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243 | 3b760e04 | pbrook | initrd_size = load_image_targphys(info->initrd_filename, |
244 | 3b760e04 | pbrook | info->loader_start |
245 | 3b760e04 | pbrook | + INITRD_LOAD_ADDR, |
246 | 3b760e04 | pbrook | ram_size - INITRD_LOAD_ADDR); |
247 | daf90626 | pbrook | if (initrd_size < 0) { |
248 | daf90626 | pbrook | fprintf(stderr, "qemu: could not load initrd '%s'\n",
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249 | f93eb9ff | balrog | info->initrd_filename); |
250 | daf90626 | pbrook | exit(1);
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251 | daf90626 | pbrook | } |
252 | daf90626 | pbrook | } else {
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253 | daf90626 | pbrook | initrd_size = 0;
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254 | daf90626 | pbrook | } |
255 | f93eb9ff | balrog | bootloader[1] |= info->board_id & 0xff; |
256 | f93eb9ff | balrog | bootloader[2] |= (info->board_id >> 8) & 0xff; |
257 | f93eb9ff | balrog | bootloader[5] = info->loader_start + KERNEL_ARGS_ADDR;
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258 | 1c7b3754 | pbrook | bootloader[6] = entry;
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259 | 52b43737 | pbrook | for (n = 0; n < sizeof(bootloader) / 4; n++) { |
260 | 52b43737 | pbrook | stl_phys_notdirty(info->loader_start + (n * 4), bootloader[n]);
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261 | 52b43737 | pbrook | } |
262 | 52b43737 | pbrook | if (info->nb_cpus > 1) { |
263 | 52b43737 | pbrook | for (n = 0; n < sizeof(smpboot) / 4; n++) { |
264 | 52b43737 | pbrook | stl_phys_notdirty(info->smp_loader_start + (n * 4), smpboot[n]);
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265 | 52b43737 | pbrook | } |
266 | 52b43737 | pbrook | } |
267 | 2b8f2d41 | balrog | if (old_param)
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268 | 52b43737 | pbrook | set_kernel_args_old(info, initrd_size, info->loader_start); |
269 | 2b8f2d41 | balrog | else
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270 | 52b43737 | pbrook | set_kernel_args(info, initrd_size, info->loader_start); |
271 | 16406950 | pbrook | } |
272 | 16406950 | pbrook | } |