machine.c

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/*
 * kernel_arch/i386/kernel/machine.c
 *
 * Copyright (c) 2003-2004 Lukasz Dembinski <dembol@nasa.com.pl>
 * All Rights Reserved
 * 
 * Date:        2004/01
 * Author:      Lukasz Dembinski
 * Info:        machine.c core file
 * Contact:     mailto: <dembol@nasa.com.pl>
 *
 */

#include <agnix/agnix.h> 
#include <agnix/bios/apm.h>
#include <agnix/console.h>
#include <agnix/irq.h> 

#define MOD_NAME        "MACHINE: "

/*
 * address = 0x00000000
 * limit   = 0
 */
u32 dummy_idt[2];
extern int apm_enabled;

void do_machine_real_mode_reboot(void)
{
    /* todo */
}

/*
 * triple fault:
 * 1. int 0
 * 2. double fault
 * 3. tripple fault and reset
 */
void do_machine_hard_reboot(void)
{
    printk(MOD_NAME "Machine hard reboot... ");

    __asm__ __volatile__ ("lidt %0\n\t"
                          "int $0"
                          :
                          :"m"(dummy_idt));
                          
    printk("failed\n");
}

void do_machine_reboot(void)
{
    printk(MOD_NAME "Machine rebooting...\n");
        
    do_machine_hard_reboot();
    do_machine_real_mode_reboot();
    
    printk(MOD_NAME "Machine reboot failed\n");
    
    for(;;) {
        __asm__ __volatile__ ("hlt");
    }    
}

void do_machine_powerdown(void)
{
    printk(MOD_NAME "Machine poweroff\n");

#ifdef CONFIG_BIOS_APM
    if (apm_enabled) {
        apm_set_power_state(APM_ALL_DEVICES, APM_POWER_STATE_OFF);

        printk(MOD_NAME "Machine poweroff failed\n");
    } else {
        printk(MOD_NAME "APM disabled, halting machine\n");
    }
#endif

    cli();      
    for(;;) {
        __asm__ __volatile__ ("hlt");
    }    
}

void do_machine_halt(void)
{
    printk(MOD_NAME "Machine halt\n");

    for(;;) {
        __asm__ __volatile__ ("hlt");
    }    
}