1 /* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Reset an IP27. 7 * 8 * Copyright (C) 1997, 1998, 1999, 2000, 06 by Ralf Baechle 9 * Copyright (C) 1999, 2000 Silicon Graphics, Inc. 10 */ 11 #include <linux/compiler.h> 12 #include <linux/kernel.h> 13 #include <linux/sched.h> 14 #include <linux/timer.h> 15 #include <linux/smp.h> 16 #include <linux/mmzone.h> 17 #include <linux/nodemask.h> 18 #include <linux/pm.h> 19 20 #include <asm/io.h> 21 #include <asm/irq.h> 22 #include <asm/reboot.h> 23 #include <asm/sgialib.h> 24 #include <asm/sn/addrs.h> 25 #include <asm/sn/arch.h> 26 #include <asm/sn/gda.h> 27 #include <asm/sn/sn0/hub.h> 28 29 void machine_restart(char *command) __noreturn; 30 void machine_halt(void) __noreturn; 31 void machine_power_off(void) __noreturn; 32 33 #define noreturn while(1); /* Silence gcc. */ 34 35 /* XXX How to pass the reboot command to the firmware??? */ 36 static void ip27_machine_restart(char *command) 37 { 38 #if 0 39 int i; 40 #endif 41 42 printk("Reboot started from CPU %d\n", smp_processor_id()); 43 #ifdef CONFIG_SMP 44 smp_send_stop(); 45 #endif 46 #if 0 47 for_each_online_node(i) 48 REMOTE_HUB_S(i, PROMOP_REG, PROMOP_REBOOT); 49 #else 50 LOCAL_HUB_S(NI_PORT_RESET, NPR_PORTRESET | NPR_LOCALRESET); 51 #endif 52 noreturn; 53 } 54 55 static void ip27_machine_halt(void) 56 { 57 int i; 58 59 #ifdef CONFIG_SMP 60 smp_send_stop(); 61 #endif 62 for_each_online_node(i) 63 REMOTE_HUB_S(i, PROMOP_REG, PROMOP_RESTART); 64 LOCAL_HUB_S(NI_PORT_RESET, NPR_PORTRESET | NPR_LOCALRESET); 65 noreturn; 66 } 67 68 static void ip27_machine_power_off(void) 69 { 70 /* To do ... */ 71 noreturn; 72 } 73 74 void ip27_reboot_setup(void) 75 { 76 _machine_restart = ip27_machine_restart; 77 _machine_halt = ip27_machine_halt; 78 pm_power_off = ip27_machine_power_off; 79 } 80