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/agent.h> 26 #include <asm/sn/arch.h> 27 #include <asm/sn/gda.h> 28 29 #include "ip27-common.h" 30 31 void machine_restart(char *command) __noreturn; 32 void machine_halt(void) __noreturn; 33 void machine_power_off(void) __noreturn; 34 35 #define noreturn while(1); /* Silence gcc. */ 36 37 /* XXX How to pass the reboot command to the firmware??? */ 38 static void ip27_machine_restart(char *command) 39 { 40 #if 0 41 int i; 42 #endif 43 44 printk("Reboot started from CPU %d\n", smp_processor_id()); 45 #ifdef CONFIG_SMP 46 smp_send_stop(); 47 #endif 48 #if 0 49 for_each_online_node(i) 50 REMOTE_HUB_S(i, PROMOP_REG, PROMOP_REBOOT); 51 #else 52 LOCAL_HUB_S(NI_PORT_RESET, NPR_PORTRESET | NPR_LOCALRESET); 53 #endif 54 noreturn; 55 } 56 57 static void ip27_machine_halt(void) 58 { 59 int i; 60 61 #ifdef CONFIG_SMP 62 smp_send_stop(); 63 #endif 64 for_each_online_node(i) 65 REMOTE_HUB_S(i, PROMOP_REG, PROMOP_RESTART); 66 LOCAL_HUB_S(NI_PORT_RESET, NPR_PORTRESET | NPR_LOCALRESET); 67 noreturn; 68 } 69 70 static void ip27_machine_power_off(void) 71 { 72 /* To do ... */ 73 noreturn; 74 } 75 76 void ip27_reboot_setup(void) 77 { 78 _machine_restart = ip27_machine_restart; 79 _machine_halt = ip27_machine_halt; 80 pm_power_off = ip27_machine_power_off; 81 } 82