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/*

 *  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 ...  */

        sti();

        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;

}