LXR linux/arch/mips/sgi-ip27/ip27-reset.c

   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
  31void machine_restart(char *command) __noreturn;
  32void machine_halt(void) __noreturn;
  33void 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??? */
  38static 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
  57static 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
  70static void ip27_machine_power_off(void)
  71{
  72        /* To do ...  */
  73        noreturn;
  74}
  75
  76void 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