/* $Id: misc.c,v 1.20 2001/09/21 03:17:07 kanoj Exp $
* misc.c: Miscellaneous prom functions that don't belong
* anywhere else.
*
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
* Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
*/
#include <linux/config.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <asm/openprom.h>
#include <asm/oplib.h>
#include <asm/system.h>
/* Reset and reboot the machine with the command 'bcommand'. */
void prom_reboot(const char *bcommand)
{
p1275_cmd("boot", P1275_ARG(0, P1275_ARG_IN_STRING) |
P1275_INOUT(1, 0), bcommand);
}
/* Forth evaluate the expression contained in 'fstring'. */
void prom_feval(const char *fstring)
{
if (!fstring || fstring[0] == 0)
return;
p1275_cmd("interpret", P1275_ARG(0, P1275_ARG_IN_STRING) |
P1275_INOUT(1, 1), fstring);
}
/* We want to do this more nicely some day. */
extern void (*prom_palette)(int);
#ifdef CONFIG_SMP
extern void smp_capture(void);
extern void smp_release(void);
#endif
/* Drop into the prom, with the chance to continue with the 'go'
* prom command.
*/
void prom_cmdline(void)
{
unsigned long flags;
local_irq_save(flags);
if (!serial_console && prom_palette)
prom_palette(1);
#ifdef CONFIG_SMP
smp_capture();
#endif
p1275_cmd("enter", P1275_INOUT(0, 0));
#ifdef CONFIG_SMP
smp_release();
#endif
if (!serial_console && prom_palette)
prom_palette(0);
local_irq_restore(flags);
}
/* Drop into the prom, but completely terminate the program.
* No chance of continuing.
*/
void prom_halt(void)
{
again:
p1275_cmd("exit", P1275_INOUT(0, 0));
goto again; /* PROM is out to get me -DaveM */
}
void prom_halt_power_off(void)
{
p1275_cmd("SUNW,power-off", P1275_INOUT(0, 0));
/* if nothing else helps, we just halt */
prom_halt();
}
/* Set prom sync handler to call function 'funcp'. */
void prom_setcallback(callback_func_t funcp)
{
if (!funcp)
return;
p1275_cmd("set-callback", P1275_ARG(0, P1275_ARG_IN_FUNCTION) |
P1275_INOUT(1, 1), funcp);
}
/* Get the idprom and stuff it into buffer 'idbuf'. Returns the
* format type. 'num_bytes' is the number of bytes that your idbuf
* has space for. Returns 0xff on error.
*/
unsigned char prom_get_idprom(char *idbuf, int num_bytes)
{
int len;
len = prom_getproplen(prom_root_node, "idprom");
if ((len >num_bytes) || (len == -1))
return 0xff;
if (!prom_getproperty(prom_root_node, "idprom", idbuf, num_bytes))
return idbuf[0];
return 0xff;
}
/* Get the major prom version number. */
int prom_version(void)
{
return PROM_P1275;
}
/* Get the prom plugin-revision. */
int prom_getrev(void)
{
return prom_rev;
}
/* Get the prom firmware print revision. */
int prom_getprev(void)
{
return prom_prev;
}
/* Install Linux trap table so PROM uses that instead of its own. */
void prom_set_trap_table(unsigned long tba)
{
p1275_cmd("SUNW,set-trap-table", P1275_INOUT(1, 0), tba);
}
int prom_get_mmu_ihandle(void)
{
int node, ret;
if (prom_mmu_ihandle_cache != 0)
return prom_mmu_ihandle_cache;
node = prom_finddevice(prom_chosen_path);
ret = prom_getint(node, prom_mmu_name);
if (ret == -1 || ret == 0)
prom_mmu_ihandle_cache = -1;
else
prom_mmu_ihandle_cache = ret;
return ret;
}
static int prom_get_memory_ihandle(void)
{
static int memory_ihandle_cache;
int node, ret;
if (memory_ihandle_cache != 0)
return memory_ihandle_cache;
node = prom_finddevice("/chosen");
ret = prom_getint(node, "memory");
if (ret == -1 || ret == 0)
memory_ihandle_cache = -1;
else
memory_ihandle_cache = ret;
return ret;
}
/* Load explicit I/D TLB entries. */
long prom_itlb_load(unsigned long index,
unsigned long tte_data,
unsigned long vaddr)
{
return p1275_cmd(prom_callmethod_name,
(P1275_ARG(0, P1275_ARG_IN_STRING) |
P1275_ARG(2, P1275_ARG_IN_64B) |
P1275_ARG(3, P1275_ARG_IN_64B) |
P1275_INOUT(5, 1)),
"SUNW,itlb-load",
prom_get_mmu_ihandle(),
/* And then our actual args are pushed backwards. */
vaddr,
tte_data,
index);
}
long prom_dtlb_load(unsigned long index,
unsigned long tte_data,
unsigned long vaddr)
{
return p1275_cmd(prom_callmethod_name,
(P1275_ARG(0, P1275_ARG_IN_STRING) |
P1275_ARG(2, P1275_ARG_IN_64B) |
P1275_ARG(3, P1275_ARG_IN_64B) |
P1275_INOUT(5, 1)),
"SUNW,dtlb-load",
prom_get_mmu_ihandle(),
/* And then our actual args are pushed backwards. */
vaddr,
tte_data,
index);
}
int prom_map(int mode, unsigned long size,
unsigned long vaddr, unsigned long paddr)
{
int ret = p1275_cmd(prom_callmethod_name,
(P1275_ARG(0, P1275_ARG_IN_STRING) |
P1275_ARG(3, P1275_ARG_IN_64B) |
P1275_ARG(4, P1275_ARG_IN_64B) |
P1275_ARG(6, P1275_ARG_IN_64B) |
P1275_INOUT(7, 1)),
prom_map_name,
prom_get_mmu_ihandle(),
mode,
size,
vaddr,
0,
paddr);
if (ret == 0)
ret = -1;
return ret;
}
void prom_unmap(unsigned long size, unsigned long vaddr)
{
p1275_cmd(prom_callmethod_name,
(P1275_ARG(0, P1275_ARG_IN_STRING) |
P1275_ARG(2, P1275_ARG_IN_64B) |
P1275_ARG(3, P1275_ARG_IN_64B) |
P1275_INOUT(4, 0)),
prom_unmap_name,
prom_get_mmu_ihandle(),
size,
vaddr);
}
/* Set aside physical memory which is not touched or modified
* across soft resets.
*/
unsigned long prom_retain(const char *name,
unsigned long pa_low, unsigned long pa_high,
long size, long align)
{
/* XXX I don't think we return multiple values correctly.
* XXX OBP supposedly returns pa_low/pa_high here, how does
* XXX it work?
*/
/* If align is zero, the pa_low/pa_high args are passed,
* else they are not.
*/
if (align == 0)
return p1275_cmd("SUNW,retain",
(P1275_ARG(0, P1275_ARG_IN_BUF) | P1275_INOUT(5, 2)),
name, pa_low, pa_high, size, align);
else
return p1275_cmd("SUNW,retain",
(P1275_ARG(0, P1275_ARG_IN_BUF) | P1275_INOUT(3, 2)),
name, size, align);
}
/* Get "Unumber" string for the SIMM at the given
* memory address. Usually this will be of the form
* "Uxxxx" where xxxx is a decimal number which is
* etched into the motherboard next to the SIMM slot
* in question.
*/
int prom_getunumber(int syndrome_code,
unsigned long phys_addr,
char *buf, int buflen)
{
return p1275_cmd(prom_callmethod_name,
(P1275_ARG(0, P1275_ARG_IN_STRING) |
P1275_ARG(3, P1275_ARG_OUT_BUF) |
P1275_ARG(6, P1275_ARG_IN_64B) |
P1275_INOUT(8, 2)),
"SUNW,get-unumber", prom_get_memory_ihandle(),
buflen, buf, P1275_SIZE(buflen),
0, phys_addr, syndrome_code);
}
/* Power management extensions. */
void prom_sleepself(void)
{
p1275_cmd("SUNW,sleep-self", P1275_INOUT(0, 0));
}
int prom_sleepsystem(void)
{
return p1275_cmd("SUNW,sleep-system", P1275_INOUT(0, 1));
}
int prom_wakeupsystem(void)
{
return p1275_cmd("SUNW,wakeup-system", P1275_INOUT(0, 1));
}
#ifdef CONFIG_SMP
void prom_startcpu(int cpunode, unsigned long pc, unsigned long o0)
{
p1275_cmd("SUNW,start-cpu", P1275_INOUT(3, 0), cpunode, pc, o0);
}
void prom_stopself(void)
{
p1275_cmd("SUNW,stop-self", P1275_INOUT(0, 0));
}
void prom_idleself(void)
{
p1275_cmd("SUNW,idle-self", P1275_INOUT(0, 0));
}
void prom_resumecpu(int cpunode)
{
p1275_cmd("SUNW,resume-cpu", P1275_INOUT(1, 0), cpunode);
}
#endif
