1 // SPDX-License-Identifier: GPL-2.0 << 2 /* 1 /* 3 * linux/arch/mips/sni/process.c 2 * linux/arch/mips/sni/process.c 4 * 3 * 5 * Reset a SNI machine. 4 * Reset a SNI machine. 6 */ 5 */ 7 #include <linux/delay.h> << 8 << 9 #include <asm/io.h> 6 #include <asm/io.h> 10 #include <asm/reboot.h> 7 #include <asm/reboot.h> >> 8 #include <asm/system.h> 11 #include <asm/sni.h> 9 #include <asm/sni.h> 12 10 13 /* 11 /* 14 * This routine reboots the machine by asking 12 * This routine reboots the machine by asking the keyboard 15 * controller to pulse the reset-line low. We 13 * controller to pulse the reset-line low. We try that for a while, 16 * and if it doesn't work, we do some other st 14 * and if it doesn't work, we do some other stupid things. 17 */ 15 */ 18 static inline void kb_wait(void) !! 16 static inline void >> 17 kb_wait(void) 19 { 18 { 20 int i; 19 int i; 21 20 22 for (i = 0; i < 0x10000; i++) !! 21 for (i=0; i<0x10000; i++) 23 if ((inb_p(0x64) & 0x02) == 0) 22 if ((inb_p(0x64) & 0x02) == 0) 24 break; 23 break; 25 } 24 } 26 25 27 /* XXX This ends up at the ARC firmware prompt 26 /* XXX This ends up at the ARC firmware prompt ... */ 28 void sni_machine_restart(char *command) 27 void sni_machine_restart(char *command) 29 { 28 { 30 int i; !! 29 int i, j; 31 30 32 /* This does a normal via the keyboard 31 /* This does a normal via the keyboard controller like a PC. 33 We can do that easier ... */ 32 We can do that easier ... */ 34 local_irq_disable(); 33 local_irq_disable(); 35 for (;;) { 34 for (;;) { 36 for (i = 0; i < 100; i++) { !! 35 for (i=0; i<100; i++) { 37 kb_wait(); 36 kb_wait(); 38 udelay(50); !! 37 for(j = 0; j < 100000 ; j++) 39 outb_p(0xfe, 0x64); !! 38 /* nothing */; 40 udelay(50); !! 39 outb_p(0xfe,0x64); /* pulse reset low */ 41 } 40 } 42 } 41 } >> 42 } >> 43 >> 44 void sni_machine_halt(void) >> 45 { 43 } 46 } 44 47 45 void sni_machine_power_off(void) 48 void sni_machine_power_off(void) 46 { 49 { 47 *(volatile unsigned char *)PCIMT_CSWCS 50 *(volatile unsigned char *)PCIMT_CSWCSM = 0xfd; 48 } 51 } 49 52
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