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