int boot_linux_from_flash(void)
{
boot_img_hdr *hdr = (void*) raw_header;
unsigned n;
ptentry *p;
unsigned offset = 0;
const char *cmdline;
if((p = flash_find_ptn("boot")) == 0) {
cprintf("NO BOOT PARTITION\n");
return -1;
}
if(flash_read(p, offset, raw_header, 2048)) {
cprintf("CANNOT READ BOOT IMAGE HEADER\n");
return -1;
}
offset += 2048;
if(memcmp(hdr->magic, BOOT_MAGIC, BOOT_MAGIC_SIZE)) {
cprintf("INVALID BOOT IMAGE HEADER\n");
return -1;
}
n = (hdr->kernel_size + (FLASH_PAGE_SIZE - 1)) & (~(FLASH_PAGE_SIZE - 1));
if(flash_read(p, offset, (void*) hdr->kernel_addr, n)) {
cprintf("CANNOT READ KERNEL IMAGE\n");
return -1;
}
offset += n;
n = (hdr->ramdisk_size + (FLASH_PAGE_SIZE - 1)) & (~(FLASH_PAGE_SIZE - 1));
if(flash_read(p, offset, (void*) hdr->ramdisk_addr, n)) {
cprintf("CANNOT READ RAMDISK IMAGE\n");
return -1;
}
offset += n;
dprintf("\nkernel @ %x (%d bytes)\n", hdr->kernel_addr, hdr->kernel_size);
dprintf("ramdisk @ %x (%d bytes)\n\n\n", hdr->ramdisk_addr, hdr->ramdisk_size);
if(hdr->cmdline[0]) {
cmdline = (char*) hdr->cmdline;
} else {
cmdline = board_cmdline();
if(cmdline == 0) {
cmdline = "mem=50M console=null";
}
}
cprintf("cmdline = '%s'\n", cmdline);
cprintf("\nBooting Linux\n");
create_atags(ADDR_TAGS, cmdline,
hdr->ramdisk_addr, hdr->ramdisk_size);
boot_linux(hdr->kernel_addr);
return 0;
}
static void boot_linux(void)
{
unsigned *tags = (unsigned*) TAGS_ADDR;
int ret;
int (*entry)(unsigned,unsigned,unsigned) = (void*) kernel_addr;
if(linux_type == 0) {
linux_type = board_machtype();
}
if(!cmdline[0]){
strcpy(cmdline, board_cmdline());
}
fixup_tags((unsigned*) linux_tags, tags, cmdline);
DISPLAY_MSG("entry=%x, entry(%d, %d, %x)\n", entry, 0, linux_type, tags);
ret = entry(0, linux_type, tags);
mmu_off();
DISPLAY_MSG("ok ret=%x\n", ret);
//goroh for re-entry boot-img loading
// for(;;);
}
