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/system.h> 9 #include <asm/sni.h> 10 11 /* 12 * This routine reboots the machine by asking the keyboard 13 * controller to pulse the reset-line low. We try that for a while, 14 * and if it doesn't work, we do some other stupid things. 15 */ 16 static inline void kb_wait(void) 17 { 18 int i; 19 20 for (i = 0; i < 0x10000; i++) 21 if ((inb_p(0x64) & 0x02) == 0) 22 break; 23 } 24 25 /* XXX This ends up at the ARC firmware prompt ... */ 26 void sni_machine_restart(char *command) 27 { 28 int i, j; 29 30 /* This does a normal via the keyboard controller like a PC. 31 We can do that easier ... */ 32 local_irq_disable(); 33 for (;;) { 34 for (i = 0; i < 100; i++) { 35 kb_wait(); 36 for (j = 0; j < 100000 ; j++) 37 /* nothing */; 38 outb_p(0xfe, 0x64); /* pulse reset low */ 39 } 40 } 41 } 42 43 void sni_machine_power_off(void) 44 { 45 *(volatile unsigned char *)PCIMT_CSWCSM = 0xfd; 46 } 47