/*
* 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;
}
static void *claim(unsigned long virt, unsigned long size, unsigned long align)
{
int ret;
unsigned int result;
if (need_map < 0)
need_map = check_of_version();
if (align || !need_map)
return (void *) call_prom("claim", 3, 1, virt, size, align);
ret = call_prom_ret("call-method", 5, 2, &result, "claim", memory,
align, size, virt);
if (ret != 0 || result == -1)
return (void *) -1;
ret = call_prom_ret("call-method", 5, 2, &result, "claim", chosen_mmu,
align, size, virt);
/* 0x12 == coherent + read/write */
ret = call_prom("call-method", 6, 1, "map", chosen_mmu,
0x12, size, virt, virt);
return (void *) virt;
}
static int check_of_version(void)
{
phandle oprom, chosen;
char version[64];
oprom = finddevice("/openprom");
if (oprom == (phandle) -1)
return 0;
if (getprop(oprom, "model", version, sizeof(version)) <= 0)
return 0;
version[sizeof(version)-1] = 0;
printf("OF version = '%s'\r\n", version);
if (!string_match(version, "Open Firmware, 1.")
&& !string_match(version, "FirmWorks,3."))
return 0;
chosen = finddevice("/chosen");
if (chosen == (phandle) -1) {
chosen = finddevice("/chosen@0");
if (chosen == (phandle) -1) {
printf("no chosen\n");
return 0;
}
}
if (getprop(chosen, "mmu", &chosen_mmu, sizeof(chosen_mmu)) <= 0) {
printf("no mmu\n");
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) {
printf("no memory node\n");
return 0;
}
}
printf("old OF detected\r\n");
return 1;
}
int of1275_write(phandle node, void *buf, int buflen)
{
return call_prom("write", 3, 1, node, buf, buflen);
}
int of1275_map(unsigned int phys, unsigned int virt, unsigned int size)
{
return call_prom("call-method", 6, 1, "map", mmu, 0, size, virt, phys);
}
static void of_console_write(char *buf, int len)
{
call_prom("write", 3, 1, of_stdout_handle, buf, len);
}
static int of_setprop(const void *phandle, const char *name, const void *buf,
const int buflen)
{
return call_prom("setprop", 4, 1, phandle, name, buf, buflen);
}
/*
* OF device tree routines
*/
static void *of_finddevice(const char *name)
{
return (phandle) call_prom("finddevice", 1, 1, name);
}
static void of_exit(void)
{
call_prom("exit", 0, 0);
}
int of1275_read(phandle node, void *buf, int buflen)
{
return call_prom("read", 3, 1, node, buf, buflen);
}
