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/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/system.h>
  23#include <asm/sgialib.h>
  24#include <asm/sn/addrs.h>
  25#include <asm/sn/arch.h>
  26#include <asm/sn/gda.h>
  27#include <asm/sn/sn0/hub.h>
  28
  29void machine_restart(char *command) __attribute__((noreturn));
  30void machine_halt(void) __attribute__((noreturn));
  31void machine_power_off(void) __attribute__((noreturn));
  32
  33#define noreturn while(1);                              /* Silence gcc.  */
  34
  35/* XXX How to pass the reboot command to the firmware??? */
  36static void ip27_machine_restart(char *command)
  37{
  38#if 0
  39        int i;
  40#endif
  41
  42        printk("Reboot started from CPU %d\n", smp_processor_id());
  43#ifdef CONFIG_SMP
  44        smp_send_stop();
  45#endif
  46#if 0
  47        for_each_online_node(i)
  48                REMOTE_HUB_S(COMPACT_TO_NASID_NODEID(i), PROMOP_REG,
  49                                                        PROMOP_REBOOT);
  50#else
  51        LOCAL_HUB_S(NI_PORT_RESET, NPR_PORTRESET | NPR_LOCALRESET);
  52#endif
  53        noreturn;
  54}
  55
  56static void ip27_machine_halt(void)
  57{
  58        int i;
  59
  60#ifdef CONFIG_SMP
  61        smp_send_stop();
  62#endif
  63        for_each_online_node(i)
  64                REMOTE_HUB_S(COMPACT_TO_NASID_NODEID(i), PROMOP_REG,
  65                                                        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