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reboot.c

#include <linux/module.h>
#include <linux/smp.h>
#include <linux/delay.h>

#include <asm/io.h>
#include "piix4.h"

void (*pm_power_off)(void);
EXPORT_SYMBOL(pm_power_off);

void machine_shutdown(void)
{
#ifdef CONFIG_SMP
      smp_send_stop();
#endif
}

void machine_emergency_restart(void)
{
      /*
       * Visual Workstations restart after this
       * register is poked on the PIIX4
       */
      outb(PIIX4_RESET_VAL, PIIX4_RESET_PORT);
}

void machine_restart(char * __unused)
{
      machine_shutdown();
      machine_emergency_restart();
}

void machine_power_off(void)
{
      unsigned short pm_status;
      extern unsigned int pci_bus0;

      while ((pm_status = inw(PMSTS_PORT)) & 0x100)
            outw(pm_status, PMSTS_PORT);

      outw(PM_SUSPEND_ENABLE, PMCNTRL_PORT);

      mdelay(10);

#define PCI_CONF1_ADDRESS(bus, devfn, reg) \
      (0x80000000 | (bus << 16) | (devfn << 8) | (reg & ~3))

      outl(PCI_CONF1_ADDRESS(pci_bus0, SPECIAL_DEV, SPECIAL_REG), 0xCF8);
      outl(PIIX_SPECIAL_STOP, 0xCFC);
}

void machine_halt(void)
{
}


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