static int macio_nvram_shift(void)
{
int nvram_flat;
if (is_oldworld())
return OW_IO_NVRAM_SHIFT;
nvram_flat = fw_cfg_read_i32(FW_CFG_PPC_NVRAM_FLAT);
return nvram_flat ? 0 : 1;
}
int
bootcode_load(ihandle_t dev)
{
int retval = -1, count = 0, fd;
unsigned long bootcode, loadbase, offset;
/* Mark the saved-program-state as invalid */
feval("0 state-valid !");
fd = open_ih(dev);
if (fd == -1) {
goto out;
}
/* Default to loading at load-base */
fword("load-base");
loadbase = POP();
#ifdef CONFIG_PPC
/* However Old World Macs need to load to a different address */
if (is_oldworld()) {
loadbase = OLDWORLD_BOOTCODE_BASEADDR;
}
#endif
bootcode = loadbase;
offset = 0;
while(1) {
if (seek_io(fd, offset) == -1)
break;
count = read_io(fd, (void *)bootcode, 512);
offset += count;
bootcode += count;
}
/* If we didn't read anything then exit */
if (!count) {
goto out;
}
/* Initialise saved-program-state */
PUSH(loadbase);
feval("saved-program-state >sps.entry !");
PUSH(offset);
feval("saved-program-state >sps.file-size !");
feval("bootcode saved-program-state >sps.file-type !");
feval("-1 state-valid !");
out:
close_io(fd);
return retval;
}
