void of1275_prominit(prom_entry entry)
{
promptr = entry;
chosen_handle = of1275_finddevice("/chosen");
if (chosen_handle == (phandle) (-1)) {
chosen_handle = of1275_finddevice("/chosen@0");
if (chosen_handle == (phandle) (-1))
of1275_exit();
}
if (of1275_getprop(chosen_handle, "stdout", &stdout, sizeof(stdout)) !=
4)
of1275_exit();
stderr = stdout;
if (of1275_getprop(chosen_handle, "stdin", &stdin, sizeof(stdin)) != 4)
of1275_exit();
if (!check_of_version())
return;
claim_needs_map = 1;
if (of1275_getprop(chosen_handle, "mmu", &mmu, sizeof(mmu)) != 4)
of1275_exit();
}
int of_find_integer_property(const char *device, const char *property)
{
int phandle;
int integer;
int size;
/* find the device's phandle */
if (of1275_finddevice(device, &phandle) < 0) {
//printk("of1275: no such device '%s'\n", device);
exit(1);
}
/* find the device's property */
of1275_getprop(phandle, property, &integer,
sizeof(integer), &size);
if (size < sizeof(integer)) {
//printk("of1275: unknown integer property '%s'\n", property);
exit(1);
}
return ntohl(integer);
}
void
of_find_string_property(const char *device,
const char *property,
char *string, int sizeof_string)
{
int phandle;
int size;
/* find the device's phandle */
if (of1275_finddevice(device, &phandle) < 0) {
//printk("of1275: no such device '%s'\n", device);
exit(1);
}
/* find the device's property */
of1275_getprop(phandle, property, string, sizeof_string, &size);
if (size == 0 || size >= sizeof_string) {
//printk("of1275: unknown string property '%s'\n", property);
exit(1);
}
}
/*
* Older OF's require that when claiming a specific range of addresses,
* we claim the physical space in the /memory node and the virtual
* space in the chosen mmu node, and then do a map operation to
* map virtual to physical.
*/
static int check_of_version(void)
{
phandle oprom;
char version[20];
oprom = of1275_finddevice("/openprom");
if (oprom == (phandle) (-1))
return 0;
if (of1275_getprop(oprom, "model", version, sizeof(version)) <= 0)
return 0;
if (!string_match(version, "Open Firmware, 1.")
&& !string_match(version, "FirmWorks,3."))
return 0;
memory = (ihandle) call_prom("open", 1, 1, "/memory");
if (memory == (ihandle) (-1)) {
memory = (ihandle) call_prom("open", 1, 1, "/memory@0");
if (memory == (ihandle) (-1))
return 0;
}
return 1;
}
