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 void arm_load_kernel(CPUState
*env
, int ram_size
, const char *kernel_filename
,
80 const char *kernel_cmdline
, const char *initrd_filename
,
81 int board_id
, target_phys_addr_t loader_start
)
90 /* Load the kernel. */
91 if (!kernel_filename
) {
92 fprintf(stderr
, "Kernel image must be specified\n");
96 if (!env
->kernel_filename
) {
97 env
->ram_size
= ram_size
;
98 env
->kernel_filename
= kernel_filename
;
99 env
->kernel_cmdline
= kernel_cmdline
;
100 env
->initrd_filename
= initrd_filename
;
101 env
->board_id
= board_id
;
102 env
->loader_start
= loader_start
;
103 qemu_register_reset(main_cpu_reset
, env
);
105 /* Assume that raw images are linux kernels, and ELF images are not. */
106 kernel_size
= load_elf(kernel_filename
, 0, &elf_entry
, NULL
, NULL
);
108 if (kernel_size
< 0) {
109 kernel_size
= load_uboot(kernel_filename
, &entry
, &is_linux
);
111 if (kernel_size
< 0) {
112 kernel_size
= load_image(kernel_filename
,
113 phys_ram_base
+ KERNEL_LOAD_ADDR
);
114 entry
= loader_start
+ KERNEL_LOAD_ADDR
;
117 if (kernel_size
< 0) {
118 fprintf(stderr
, "qemu: could not load kernel '%s'\n", kernel_filename
);
122 /* Jump to the entry point. */
123 env
->regs
[15] = entry
& 0xfffffffe;
124 env
->thumb
= entry
& 1;
126 if (initrd_filename
) {
127 initrd_size
= load_image(initrd_filename
,
128 phys_ram_base
+ INITRD_LOAD_ADDR
);
129 if (initrd_size
< 0) {
130 fprintf(stderr
, "qemu: could not load initrd '%s'\n",
137 bootloader
[1] |= board_id
& 0xff;
138 bootloader
[2] |= (board_id
>> 8) & 0xff;
139 bootloader
[5] = loader_start
+ KERNEL_ARGS_ADDR
;
140 bootloader
[6] = entry
;
141 for (n
= 0; n
< sizeof(bootloader
) / 4; n
++)
142 stl_raw(phys_ram_base
+ (n
* 4), bootloader
[n
]);
143 set_kernel_args(ram_size
, initrd_size
, kernel_cmdline
, loader_start
);