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 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 18#include <asm/io.h> 19#include <asm/irq.h> 20#include <asm/reboot.h> 21#include <asm/system.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 28void machine_restart(char *command) __attribute__((noreturn)); 29void machine_halt(void) __attribute__((noreturn)); 30void machine_power_off(void) __attribute__((noreturn)); 31 32#define noreturn while(1); /* Silence gcc. */ 33 34static void ip27_machine_restart(char *command) 35{ 36 37 printk("Reboot started from CPU %d\n", smp_processor_id()); 38#ifdef CONFIG_SMP 39 smp_send_stop(); 40#endif 41 LOCAL_HUB_S(NI_PORT_RESET, NPR_PORTRESET | NPR_LOCALRESET); 42 noreturn; 43} 44 45static void ip27_machine_halt(void) 46{ 47 int i; 48 49#ifdef CONFIG_SMP 50 smp_send_stop(); 51#endif 52 for (i = 0; i < numnodes; i++) 53 REMOTE_HUB_S(COMPACT_TO_NASID_NODEID(i), PROMOP_REG, 54 PROMOP_RESTART); 55 LOCAL_HUB_S(NI_PORT_RESET, NPR_PORTRESET | NPR_LOCALRESET); 56 noreturn; 57} 58 59static void ip27_machine_power_off(void) 60{ 61 /* To do ... */ 62 noreturn; 63} 64 65void ip27_reboot_setup(void) 66{ 67 _machine_restart = ip27_machine_restart; 68 _machine_halt = ip27_machine_halt; 69 _machine_power_off = ip27_machine_power_off; 70} 71