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/config.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/system.h> 24 #include <asm/sgialib.h> 25 #include <asm/sn/addrs.h> 26 #include <asm/sn/arch.h> 27 #include <asm/sn/gda.h> 28 #include <asm/sn/sn0/hub.h> 29 30 void machine_restart(char *command) __attribute__((noreturn)); 31 void machine_halt(void) __attribute__((noreturn)); 32 void machine_power_off(void) __attribute__((noreturn)); 33 34 #define noreturn while(1); /* Silence gcc. */ 35 36 /* XXX How to pass the reboot command to the firmware??? */ 37 static void ip27_machine_restart(char *command) 38 { 39 #if 0 40 int i; 41 #endif 42 43 printk("Reboot started from CPU %d\n", smp_processor_id()); 44 #ifdef CONFIG_SMP 45 smp_send_stop(); 46 #endif 47 #if 0 48 for_each_online_node(i) 49 REMOTE_HUB_S(COMPACT_TO_NASID_NODEID(i), PROMOP_REG, 50 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(COMPACT_TO_NASID_NODEID(i), PROMOP_REG, 66 PROMOP_RESTART); 67 LOCAL_HUB_S(NI_PORT_RESET, NPR_PORTRESET | NPR_LOCALRESET); 68 noreturn; 69 } 70 71 static void ip27_machine_power_off(void) 72 { 73 /* To do ... */ 74 noreturn; 75 } 76 77 void ip27_reboot_setup(void) 78 { 79 _machine_restart = ip27_machine_restart; 80 _machine_halt = ip27_machine_halt; 81 pm_power_off = ip27_machine_power_off; 82 } 83