ip27-reset.c

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/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Reset an IP27.
 *
 * Copyright (C) 1997, 1998, 1999, 2000, 06 by Ralf Baechle
 * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
 */
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/timer.h>
#include <linux/smp.h>
#include <linux/mmzone.h>
#include <linux/nodemask.h>
#include <linux/pm.h>

#include <asm/io.h>
#include <asm/irq.h>
#include <asm/reboot.h>
#include <asm/sgialib.h>
#include <asm/sn/addrs.h>
#include <asm/sn/arch.h>
#include <asm/sn/gda.h>
#include <asm/sn/sn0/hub.h>

void machine_restart(char *command) __attribute__((noreturn));
void machine_halt(void) __attribute__((noreturn));
void machine_power_off(void) __attribute__((noreturn));

#define noreturn while(1);              /* Silence gcc.  */

/* XXX How to pass the reboot command to the firmware??? */
static void ip27_machine_restart(char *command)
{
#if 0
    int i;
#endif

    printk("Reboot started from CPU %d\n", smp_processor_id());
#ifdef CONFIG_SMP
    smp_send_stop();
#endif
#if 0
    for_each_online_node(i)
        REMOTE_HUB_S(COMPACT_TO_NASID_NODEID(i), PROMOP_REG,
                            PROMOP_REBOOT);
#else
    LOCAL_HUB_S(NI_PORT_RESET, NPR_PORTRESET | NPR_LOCALRESET);
#endif
    noreturn;
}

static void ip27_machine_halt(void)
{
    int i;

#ifdef CONFIG_SMP
    smp_send_stop();
#endif
    for_each_online_node(i)
        REMOTE_HUB_S(COMPACT_TO_NASID_NODEID(i), PROMOP_REG,
                            PROMOP_RESTART);
    LOCAL_HUB_S(NI_PORT_RESET, NPR_PORTRESET | NPR_LOCALRESET);
    noreturn;
}

static void ip27_machine_power_off(void)
{
    /* To do ...  */
    noreturn;
}

void ip27_reboot_setup(void)
{
    _machine_restart = ip27_machine_restart;
    _machine_halt = ip27_machine_halt;
    pm_power_off = ip27_machine_power_off;
}