bios_reboot.c File Reference

Standard PC-BIOS reboot mechanism. More...

#include <string.h>
#include <ipxe/reboot.h>
#include <realmode.h>
#include <bios.h>
#include <ipxe/apm.h>
#include <ipxe/acpipwr.h>

Go to the source code of this file.

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
static void	bios_reboot (int flags)
	Reboot system. More...
static int	bios_poweroff (void)
	Power off system. More...
	PROVIDE_REBOOT (pcbios, reboot, bios_reboot)
	PROVIDE_REBOOT (pcbios, poweroff, bios_poweroff)

Detailed Description

Standard PC-BIOS reboot mechanism.

Definition in file bios_reboot.c.

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER_OR_UBDL

)

bios_reboot()

static void bios_reboot ( int  flags )

static

Reboot system.

Parameters

flags

Reboot flags

Definition at line 44 of file bios_reboot.c.

                                      {
        uint16_t type;

        /* Configure BIOS for cold/warm reboot */
        type = ( ( flags & REBOOT_WARM ) ? BDA_REBOOT_WARM : 0 );
        put_real ( type, BDA_SEG, BDA_REBOOT );

        /* Jump to system reset vector */
        __asm__ __volatile__ ( REAL_CODE ( "ljmp $0xf000, $0xfff0" ) : );
}

References __asm__(), __volatile__(), BDA_REBOOT, BDA_REBOOT_WARM, BDA_SEG, flags, put_real, REAL_CODE, REBOOT_WARM, and type.

bios_poweroff()

static int bios_poweroff ( void  )

static

Power off system.

Return values

rc	Return status code

Definition at line 60 of file bios_reboot.c.

                                  {
        int rc;

        /* Try APM */
        if ( ( rc = apm_poweroff() ) != 0 )
                DBG ( "APM power off failed: %s\n", strerror ( rc ) );

        /* Try ACPI */
        if ( ( rc = acpi_poweroff() ) != 0 )
                DBG ( "ACPI power off failed: %s\n", strerror ( rc ) );

        return rc;
}

References acpi_poweroff(), apm_poweroff(), DBG, rc, and strerror().

PROVIDE_REBOOT() [1/2]

PROVIDE_REBOOT	(	pcbios	,
		reboot	,
		bios_reboot
	)

PROVIDE_REBOOT() [2/2]

PROVIDE_REBOOT	(	pcbios	,
		poweroff	,
		bios_poweroff
	)