git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2574 c046a42c-6fe2-441c-8c8c-71466251a162
145 lines
4.2 KiB
C
145 lines
4.2 KiB
C
/*
|
|
* ARM kernel loader.
|
|
*
|
|
* Copyright (c) 2006 CodeSourcery.
|
|
* Written by Paul Brook
|
|
*
|
|
* This code is licenced under the GPL.
|
|
*/
|
|
|
|
#include "vl.h"
|
|
|
|
#define KERNEL_ARGS_ADDR 0x100
|
|
#define KERNEL_LOAD_ADDR 0x00010000
|
|
#define INITRD_LOAD_ADDR 0x00800000
|
|
|
|
/* The worlds second smallest bootloader. Set r0-r2, then jump to kernel. */
|
|
static uint32_t bootloader[] = {
|
|
0xe3a00000, /* mov r0, #0 */
|
|
0xe3a01000, /* mov r1, #0x?? */
|
|
0xe3811c00, /* orr r1, r1, #0x??00 */
|
|
0xe59f2000, /* ldr r2, [pc, #0] */
|
|
0xe59ff000, /* ldr pc, [pc, #0] */
|
|
0, /* Address of kernel args. Set by integratorcp_init. */
|
|
0 /* Kernel entry point. Set by integratorcp_init. */
|
|
};
|
|
|
|
static void main_cpu_reset(void *opaque)
|
|
{
|
|
CPUState *env = opaque;
|
|
|
|
cpu_reset(env);
|
|
if (env->kernel_filename)
|
|
arm_load_kernel(env, env->ram_size, env->kernel_filename,
|
|
env->kernel_cmdline, env->initrd_filename,
|
|
env->board_id);
|
|
}
|
|
|
|
static void set_kernel_args(uint32_t ram_size, int initrd_size,
|
|
const char *kernel_cmdline)
|
|
{
|
|
uint32_t *p;
|
|
|
|
p = (uint32_t *)(phys_ram_base + KERNEL_ARGS_ADDR);
|
|
/* ATAG_CORE */
|
|
stl_raw(p++, 5);
|
|
stl_raw(p++, 0x54410001);
|
|
stl_raw(p++, 1);
|
|
stl_raw(p++, 0x1000);
|
|
stl_raw(p++, 0);
|
|
/* ATAG_MEM */
|
|
stl_raw(p++, 4);
|
|
stl_raw(p++, 0x54410002);
|
|
stl_raw(p++, ram_size);
|
|
stl_raw(p++, 0);
|
|
if (initrd_size) {
|
|
/* ATAG_INITRD2 */
|
|
stl_raw(p++, 4);
|
|
stl_raw(p++, 0x54420005);
|
|
stl_raw(p++, INITRD_LOAD_ADDR);
|
|
stl_raw(p++, initrd_size);
|
|
}
|
|
if (kernel_cmdline && *kernel_cmdline) {
|
|
/* ATAG_CMDLINE */
|
|
int cmdline_size;
|
|
|
|
cmdline_size = strlen(kernel_cmdline);
|
|
memcpy (p + 2, kernel_cmdline, cmdline_size + 1);
|
|
cmdline_size = (cmdline_size >> 2) + 1;
|
|
stl_raw(p++, cmdline_size + 2);
|
|
stl_raw(p++, 0x54410009);
|
|
p += cmdline_size;
|
|
}
|
|
/* ATAG_END */
|
|
stl_raw(p++, 0);
|
|
stl_raw(p++, 0);
|
|
}
|
|
|
|
void arm_load_kernel(CPUState *env, int ram_size, const char *kernel_filename,
|
|
const char *kernel_cmdline, const char *initrd_filename,
|
|
int board_id)
|
|
{
|
|
int kernel_size;
|
|
int initrd_size;
|
|
int n;
|
|
int is_linux = 0;
|
|
uint64_t elf_entry;
|
|
target_ulong entry;
|
|
|
|
/* Load the kernel. */
|
|
if (!kernel_filename) {
|
|
fprintf(stderr, "Kernel image must be specified\n");
|
|
exit(1);
|
|
}
|
|
|
|
if (!env->kernel_filename) {
|
|
env->ram_size = ram_size;
|
|
env->kernel_filename = kernel_filename;
|
|
env->kernel_cmdline = kernel_cmdline;
|
|
env->initrd_filename = initrd_filename;
|
|
env->board_id = board_id;
|
|
qemu_register_reset(main_cpu_reset, env);
|
|
}
|
|
/* Assume that raw images are linux kernels, and ELF images are not. */
|
|
kernel_size = load_elf(kernel_filename, 0, &elf_entry, NULL, NULL);
|
|
entry = elf_entry;
|
|
if (kernel_size < 0) {
|
|
kernel_size = load_uboot(kernel_filename, &entry, &is_linux);
|
|
}
|
|
if (kernel_size < 0) {
|
|
kernel_size = load_image(kernel_filename,
|
|
phys_ram_base + KERNEL_LOAD_ADDR);
|
|
entry = KERNEL_LOAD_ADDR;
|
|
is_linux = 1;
|
|
}
|
|
if (kernel_size < 0) {
|
|
fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename);
|
|
exit(1);
|
|
}
|
|
if (!is_linux) {
|
|
/* Jump to the entry point. */
|
|
env->regs[15] = entry & 0xfffffffe;
|
|
env->thumb = entry & 1;
|
|
} else {
|
|
if (initrd_filename) {
|
|
initrd_size = load_image(initrd_filename,
|
|
phys_ram_base + INITRD_LOAD_ADDR);
|
|
if (initrd_size < 0) {
|
|
fprintf(stderr, "qemu: could not load initrd '%s'\n",
|
|
initrd_filename);
|
|
exit(1);
|
|
}
|
|
} else {
|
|
initrd_size = 0;
|
|
}
|
|
bootloader[1] |= board_id & 0xff;
|
|
bootloader[2] |= (board_id >> 8) & 0xff;
|
|
bootloader[5] = KERNEL_ARGS_ADDR;
|
|
bootloader[6] = entry;
|
|
for (n = 0; n < sizeof(bootloader) / 4; n++)
|
|
stl_raw(phys_ram_base + (n * 4), bootloader[n]);
|
|
set_kernel_args(ram_size, initrd_size, kernel_cmdline);
|
|
}
|
|
}
|
|
|