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/kernel.h> 12 #include <linux/sched.h> 13 #include <linux/timer.h> 14 #include <linux/smp.h> 15 #include <linux/mmzone.h> 16 #include <linux/nodemask.h> 17 #include <linux/pm.h> 18 19 #include <asm/io.h> 20 #include <asm/irq.h> 21 #include <asm/reboot.h> 22 #include <asm/sgialib.h> 23 #include <asm/sn/addrs.h> 24 #include <asm/sn/arch.h> 25 #include <asm/sn/gda.h> 26 #include <asm/sn/sn0/hub.h> 27 28 void machine_restart(char *command) __attribute__((noreturn)); 29 void machine_halt(void) __attribute__((noreturn)); 30 void machine_power_off(void) __attribute__((noreturn)); 31 32 #define noreturn while(1); /* Silence gcc. */ 33 34 /* XXX How to pass the reboot command to the firmware??? */ 35 static void ip27_machine_restart(char *command) 36 { 37 #if 0 38 int i; 39 #endif 40 41 printk("Reboot started from CPU %d\n", smp_processor_id()); 42 #ifdef CONFIG_SMP 43 smp_send_stop(); 44 #endif 45 #if 0 46 for_each_online_node(i) 47 REMOTE_HUB_S(COMPACT_TO_NASID_NODEID(i), PROMOP_REG, 48 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(COMPACT_TO_NASID_NODEID(i), PROMOP_REG, 64 PROMOP_RESTART); 65 LOCAL_HUB_S(NI_PORT_RESET, NPR_PORTRESET | NPR_LOCALRESET); 66 noreturn; 67 } 68 69 static void ip27_machine_power_off(void) 70 { 71 /* To do ... */ 72 noreturn; 73 } 74 75 void ip27_reboot_setup(void) 76 { 77 _machine_restart = ip27_machine_restart; 78 _machine_halt = ip27_machine_halt; 79 pm_power_off = ip27_machine_power_off; 80 } 81