1 /* 2 * linux/arch/mips/sni/process.c 3 * 4 * Reset a SNI machine. 5 */ 6 #include <asm/io.h> 7 #include <asm/reboot.h> 8 #include <asm/sni.h> 9 10 /* 11 * This routine reboots the machine by asking the keyboard 12 * controller to pulse the reset-line low. We try that for a while, 13 * and if it doesn't work, we do some other stupid things. 14 */ 15 static inline void kb_wait(void) 16 { 17 int i; 18 19 for (i = 0; i < 0x10000; i++) 20 if ((inb_p(0x64) & 0x02) == 0) 21 break; 22 } 23 24 /* XXX This ends up at the ARC firmware prompt ... */ 25 void sni_machine_restart(char *command) 26 { 27 int i, j; 28 29 /* This does a normal via the keyboard controller like a PC. 30 We can do that easier ... */ 31 local_irq_disable(); 32 for (;;) { 33 for (i = 0; i < 100; i++) { 34 kb_wait(); 35 for (j = 0; j < 100000 ; j++) 36 /* nothing */; 37 outb_p(0xfe, 0x64); /* pulse reset low */ 38 } 39 } 40 } 41 42 void sni_machine_power_off(void) 43 { 44 *(volatile unsigned char *)PCIMT_CSWCSM = 0xfd; 45 } 46