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/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
  34/* XXX How to pass the reboot command to the firmware??? */
  35static 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
  55static 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
  69static void ip27_machine_power_off(void)
  70{
  71        /* To do ...  */
  72        noreturn;
  73}
  74
  75void 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