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1 | 16406950 | pbrook | /*
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2 | 16406950 | pbrook | * ARM kernel loader.
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3 | 16406950 | pbrook | *
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4 | 16406950 | pbrook | * Copyright (c) 2006 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 | 16406950 | pbrook | #include "vl.h" |
11 | 16406950 | pbrook | |
12 | 16406950 | pbrook | #define KERNEL_ARGS_ADDR 0x100 |
13 | 16406950 | pbrook | #define KERNEL_LOAD_ADDR 0x00010000 |
14 | 16406950 | pbrook | #define INITRD_LOAD_ADDR 0x00800000 |
15 | 16406950 | pbrook | |
16 | 16406950 | pbrook | /* The worlds second smallest bootloader. Set r0-r2, then jump to kernel. */
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17 | 16406950 | pbrook | static uint32_t bootloader[] = {
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18 | 16406950 | pbrook | 0xe3a00000, /* mov r0, #0 */ |
19 | 16406950 | pbrook | 0xe3a01000, /* mov r1, #0x?? */ |
20 | 16406950 | pbrook | 0xe3811c00, /* orr r1, r1, #0x??00 */ |
21 | 16406950 | pbrook | 0xe59f2000, /* ldr r2, [pc, #0] */ |
22 | 16406950 | pbrook | 0xe59ff000, /* ldr pc, [pc, #0] */ |
23 | 16406950 | pbrook | 0, /* Address of kernel args. Set by integratorcp_init. */ |
24 | 16406950 | pbrook | 0 /* Kernel entry point. Set by integratorcp_init. */ |
25 | 16406950 | pbrook | }; |
26 | 16406950 | pbrook | |
27 | f3d6b95e | pbrook | static void main_cpu_reset(void *opaque) |
28 | f3d6b95e | pbrook | { |
29 | f3d6b95e | pbrook | CPUState *env = opaque; |
30 | f3d6b95e | pbrook | |
31 | f3d6b95e | pbrook | cpu_reset(env); |
32 | f3d6b95e | pbrook | if (env->kernel_filename)
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33 | f3d6b95e | pbrook | arm_load_kernel(env, env->ram_size, env->kernel_filename, |
34 | f3d6b95e | pbrook | env->kernel_cmdline, env->initrd_filename, |
35 | f3d6b95e | pbrook | env->board_id); |
36 | f3d6b95e | pbrook | } |
37 | f3d6b95e | pbrook | |
38 | 16406950 | pbrook | static void set_kernel_args(uint32_t ram_size, int initrd_size, |
39 | 16406950 | pbrook | const char *kernel_cmdline) |
40 | 16406950 | pbrook | { |
41 | 16406950 | pbrook | uint32_t *p; |
42 | 16406950 | pbrook | |
43 | 16406950 | pbrook | p = (uint32_t *)(phys_ram_base + KERNEL_ARGS_ADDR); |
44 | 16406950 | pbrook | /* ATAG_CORE */
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45 | 16406950 | pbrook | stl_raw(p++, 5);
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46 | 16406950 | pbrook | stl_raw(p++, 0x54410001);
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47 | 16406950 | pbrook | stl_raw(p++, 1);
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48 | 16406950 | pbrook | stl_raw(p++, 0x1000);
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49 | 16406950 | pbrook | stl_raw(p++, 0);
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50 | 16406950 | pbrook | /* ATAG_MEM */
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51 | 16406950 | pbrook | stl_raw(p++, 4);
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52 | 16406950 | pbrook | stl_raw(p++, 0x54410002);
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53 | 16406950 | pbrook | stl_raw(p++, ram_size); |
54 | 16406950 | pbrook | stl_raw(p++, 0);
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55 | 16406950 | pbrook | if (initrd_size) {
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56 | 16406950 | pbrook | /* ATAG_INITRD2 */
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57 | 16406950 | pbrook | stl_raw(p++, 4);
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58 | 16406950 | pbrook | stl_raw(p++, 0x54420005);
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59 | 16406950 | pbrook | stl_raw(p++, INITRD_LOAD_ADDR); |
60 | 16406950 | pbrook | stl_raw(p++, initrd_size); |
61 | 16406950 | pbrook | } |
62 | 16406950 | pbrook | if (kernel_cmdline && *kernel_cmdline) {
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63 | 16406950 | pbrook | /* ATAG_CMDLINE */
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64 | 16406950 | pbrook | int cmdline_size;
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65 | 16406950 | pbrook | |
66 | 16406950 | pbrook | cmdline_size = strlen(kernel_cmdline); |
67 | 16406950 | pbrook | memcpy (p + 2, kernel_cmdline, cmdline_size + 1); |
68 | 16406950 | pbrook | cmdline_size = (cmdline_size >> 2) + 1; |
69 | 16406950 | pbrook | stl_raw(p++, cmdline_size + 2);
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70 | 16406950 | pbrook | stl_raw(p++, 0x54410009);
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71 | 16406950 | pbrook | p += cmdline_size; |
72 | 16406950 | pbrook | } |
73 | 16406950 | pbrook | /* ATAG_END */
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74 | 16406950 | pbrook | stl_raw(p++, 0);
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75 | 16406950 | pbrook | stl_raw(p++, 0);
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76 | 16406950 | pbrook | } |
77 | 16406950 | pbrook | |
78 | daf90626 | pbrook | void arm_load_kernel(CPUState *env, int ram_size, const char *kernel_filename, |
79 | 16406950 | pbrook | const char *kernel_cmdline, const char *initrd_filename, |
80 | 16406950 | pbrook | int board_id)
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81 | 16406950 | pbrook | { |
82 | 16406950 | pbrook | int kernel_size;
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83 | 16406950 | pbrook | int initrd_size;
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84 | 16406950 | pbrook | int n;
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85 | 1c7b3754 | pbrook | int is_linux = 0; |
86 | 1c7b3754 | pbrook | uint64_t elf_entry; |
87 | 1c7b3754 | pbrook | target_ulong entry; |
88 | 16406950 | pbrook | |
89 | 16406950 | pbrook | /* Load the kernel. */
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90 | 16406950 | pbrook | if (!kernel_filename) {
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91 | 16406950 | pbrook | fprintf(stderr, "Kernel image must be specified\n");
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92 | 16406950 | pbrook | exit(1);
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93 | 16406950 | pbrook | } |
94 | daf90626 | pbrook | |
95 | f3d6b95e | pbrook | if (!env->kernel_filename) {
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96 | f3d6b95e | pbrook | env->ram_size = ram_size; |
97 | f3d6b95e | pbrook | env->kernel_filename = kernel_filename; |
98 | f3d6b95e | pbrook | env->kernel_cmdline = kernel_cmdline; |
99 | f3d6b95e | pbrook | env->initrd_filename = initrd_filename; |
100 | f3d6b95e | pbrook | env->board_id = board_id; |
101 | f3d6b95e | pbrook | qemu_register_reset(main_cpu_reset, env); |
102 | f3d6b95e | pbrook | } |
103 | 1c7b3754 | pbrook | /* Assume that raw images are linux kernels, and ELF images are not. */
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104 | 74287114 | ths | kernel_size = load_elf(kernel_filename, 0, &elf_entry, NULL, NULL); |
105 | 1c7b3754 | pbrook | entry = elf_entry; |
106 | 1c7b3754 | pbrook | if (kernel_size < 0) { |
107 | 1c7b3754 | pbrook | kernel_size = load_uboot(kernel_filename, &entry, &is_linux); |
108 | 1c7b3754 | pbrook | } |
109 | 1c7b3754 | pbrook | if (kernel_size < 0) { |
110 | 1c7b3754 | pbrook | kernel_size = load_image(kernel_filename, |
111 | 1c7b3754 | pbrook | phys_ram_base + KERNEL_LOAD_ADDR); |
112 | 1c7b3754 | pbrook | entry = KERNEL_LOAD_ADDR; |
113 | 1c7b3754 | pbrook | is_linux = 1;
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114 | 1c7b3754 | pbrook | } |
115 | 1c7b3754 | pbrook | if (kernel_size < 0) { |
116 | 1c7b3754 | pbrook | fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename);
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117 | 1c7b3754 | pbrook | exit(1);
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118 | 1c7b3754 | pbrook | } |
119 | 1c7b3754 | pbrook | if (!is_linux) {
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120 | 1c7b3754 | pbrook | /* Jump to the entry point. */
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121 | daf90626 | pbrook | env->regs[15] = entry & 0xfffffffe; |
122 | daf90626 | pbrook | env->thumb = entry & 1;
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123 | daf90626 | pbrook | } else {
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124 | daf90626 | pbrook | if (initrd_filename) {
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125 | daf90626 | pbrook | initrd_size = load_image(initrd_filename, |
126 | daf90626 | pbrook | phys_ram_base + INITRD_LOAD_ADDR); |
127 | daf90626 | pbrook | if (initrd_size < 0) { |
128 | daf90626 | pbrook | fprintf(stderr, "qemu: could not load initrd '%s'\n",
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129 | daf90626 | pbrook | initrd_filename); |
130 | daf90626 | pbrook | exit(1);
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131 | daf90626 | pbrook | } |
132 | daf90626 | pbrook | } else {
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133 | daf90626 | pbrook | initrd_size = 0;
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134 | daf90626 | pbrook | } |
135 | daf90626 | pbrook | bootloader[1] |= board_id & 0xff; |
136 | daf90626 | pbrook | bootloader[2] |= (board_id >> 8) & 0xff; |
137 | daf90626 | pbrook | bootloader[5] = KERNEL_ARGS_ADDR;
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138 | 1c7b3754 | pbrook | bootloader[6] = entry;
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139 | daf90626 | pbrook | for (n = 0; n < sizeof(bootloader) / 4; n++) |
140 | daf90626 | pbrook | stl_raw(phys_ram_base + (n * 4), bootloader[n]);
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141 | daf90626 | pbrook | set_kernel_args(ram_size, initrd_size, kernel_cmdline); |
142 | 16406950 | pbrook | } |
143 | 16406950 | pbrook | } |