linux/arch/mips/sni/reset.c
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

51 lines
973 B
C

/*
* linux/arch/mips/sni/process.c
*
* Reset a SNI machine.
*/
#include <asm/io.h>
#include <asm/reboot.h>
#include <asm/system.h>
#include <asm/sni.h>
/*
* This routine reboots the machine by asking the keyboard
* controller to pulse the reset-line low. We try that for a while,
* and if it doesn't work, we do some other stupid things.
*/
static inline void
kb_wait(void)
{
int i;
for (i=0; i<0x10000; i++)
if ((inb_p(0x64) & 0x02) == 0)
break;
}
/* XXX This ends up at the ARC firmware prompt ... */
void sni_machine_restart(char *command)
{
int i, j;
/* This does a normal via the keyboard controller like a PC.
We can do that easier ... */
local_irq_disable();
for (;;) {
for (i=0; i<100; i++) {
kb_wait();
for(j = 0; j < 100000 ; j++)
/* nothing */;
outb_p(0xfe,0x64); /* pulse reset low */
}
}
}
void sni_machine_halt(void)
{
}
void sni_machine_power_off(void)
{
*(volatile unsigned char *)PCIMT_CSWCSM = 0xfd;
}