// SPDX-License-Identifier: GPL-2.0
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/*
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* linux/arch/mips/sni/process.c
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*
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* Reset a SNI machine.
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*/
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#include <linux/delay.h>
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#include <asm/io.h>
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#include <asm/reboot.h>
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#include <asm/sni.h>
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/*
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* This routine reboots the machine by asking the keyboard
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* controller to pulse the reset-line low. We try that for a while,
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* and if it doesn't work, we do some other stupid things.
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*/
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static inline void kb_wait(void)
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{
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int i;
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for (i = 0; i < 0x10000; i++)
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if ((inb_p(0x64) & 0x02) == 0)
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break;
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}
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/* XXX This ends up at the ARC firmware prompt ... */
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void sni_machine_restart(char *command)
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{
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int i;
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/* This does a normal via the keyboard controller like a PC.
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We can do that easier ... */
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local_irq_disable();
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for (;;) {
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for (i = 0; i < 100; i++) {
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kb_wait();
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udelay(50);
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outb_p(0xfe, 0x64); /* pulse reset low */
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udelay(50);
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}
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}
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}
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void sni_machine_power_off(void)
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{
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*(volatile unsigned char *)PCIMT_CSWCSM = 0xfd;
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}
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