cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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reset.c (963B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 *  linux/arch/mips/sni/process.c
      4 *
      5 *  Reset a SNI machine.
      6 */
      7#include <linux/delay.h>
      8
      9#include <asm/io.h>
     10#include <asm/reboot.h>
     11#include <asm/sni.h>
     12
     13/*
     14 * This routine reboots the machine by asking the keyboard
     15 * controller to pulse the reset-line low. We try that for a while,
     16 * and if it doesn't work, we do some other stupid things.
     17 */
     18static inline void kb_wait(void)
     19{
     20	int i;
     21
     22	for (i = 0; i < 0x10000; i++)
     23		if ((inb_p(0x64) & 0x02) == 0)
     24			break;
     25}
     26
     27/* XXX This ends up at the ARC firmware prompt ...  */
     28void sni_machine_restart(char *command)
     29{
     30	int i;
     31
     32	/* This does a normal via the keyboard controller like a PC.
     33	   We can do that easier ...  */
     34	local_irq_disable();
     35	for (;;) {
     36		for (i = 0; i < 100; i++) {
     37			kb_wait();
     38			udelay(50);
     39			outb_p(0xfe, 0x64);	 /* pulse reset low */
     40			udelay(50);
     41		}
     42	}
     43}
     44
     45void sni_machine_power_off(void)
     46{
     47	*(volatile unsigned char *)PCIMT_CSWCSM = 0xfd;
     48}