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// SPDX-License-Identifier: GPL-2.0
/*
* linux/arch/mips/sni/process.c
*
* Reset a SNI machine.
*/
#include <linux/delay.h>
#include <asm/io.h>
#include <asm/reboot.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;
/* 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();
udelay(50);
outb_p(0xfe, 0x64); /* pulse reset low */
udelay(50);
}
}
}
void sni_machine_power_off(void)
{
*(volatile unsigned char *)PCIMT_CSWCSM = 0xfd;
}
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