// 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; }