efi_reboot.c File Reference

EFI reboot mechanism. More...

#include <errno.h>
#include <string.h>
#include <ipxe/efi/efi.h>
#include <ipxe/efi/Guid/GlobalVariable.h>
#include <ipxe/reboot.h>

Go to the source code of this file.

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
	FILE_SECBOOT (PERMITTED)
static void	efi_reboot (int flags)
	Reboot system. More...
static int	efi_poweroff (void)
	Power off system. More...
	PROVIDE_REBOOT (efi, reboot, efi_reboot)
	PROVIDE_REBOOT (efi, poweroff, efi_poweroff)

Detailed Description

EFI reboot mechanism.

Definition in file efi_reboot.c.

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER_OR_UBDL

)

FILE_SECBOOT()

FILE_SECBOOT

(

PERMITTED

)

efi_reboot()

static void efi_reboot ( int  flags )

static

Reboot system.

Parameters

flags

Reboot flags

Definition at line 45 of file efi_reboot.c.

                                     {
        EFI_RUNTIME_SERVICES *rs = efi_systab->RuntimeServices;
        static CHAR16 wname[] = EFI_OS_INDICATIONS_VARIABLE_NAME;
        UINT64 osind;
        UINT32 attrs;
        EFI_RESET_TYPE type;
        EFI_STATUS efirc;
        int rc;

        /* Request boot to firmware setup, if applicable */
        if ( flags & REBOOT_SETUP ) {
                osind = EFI_OS_INDICATIONS_BOOT_TO_FW_UI;
                attrs = ( EFI_VARIABLE_BOOTSERVICE_ACCESS |
                          EFI_VARIABLE_RUNTIME_ACCESS |
                          EFI_VARIABLE_NON_VOLATILE );
                if ( ( efirc = rs->SetVariable ( wname, &efi_global_variable,
                                                 attrs, sizeof ( osind ),
                                                 &osind ) ) != 0 ) {
                        rc = -EEFI ( efirc );
                        DBGC ( efi_systab, "EFI could not set %ls: %s\n",
                               wname, strerror ( rc ) );
                        /* Continue to reboot anyway */
                }
        }

        /* Use runtime services to reset system */
        type = ( ( flags & REBOOT_WARM ) ? EfiResetWarm : EfiResetCold );
        rs->ResetSystem ( type, 0, 0, NULL );
}

References DBGC, EEFI, efi_global_variable, EFI_OS_INDICATIONS_BOOT_TO_FW_UI, EFI_OS_INDICATIONS_VARIABLE_NAME, efi_systab, EFI_VARIABLE_BOOTSERVICE_ACCESS, EFI_VARIABLE_NON_VOLATILE, EFI_VARIABLE_RUNTIME_ACCESS, EfiResetCold, EfiResetWarm, flags, NULL, rc, REBOOT_SETUP, REBOOT_WARM, EFI_RUNTIME_SERVICES::ResetSystem, EFI_SYSTEM_TABLE::RuntimeServices, EFI_RUNTIME_SERVICES::SetVariable, strerror(), and type.

efi_poweroff()

static int efi_poweroff ( void  )

static

Power off system.

Return values

rc	Return status code

Definition at line 80 of file efi_reboot.c.

                                 {
        EFI_RUNTIME_SERVICES *rs = efi_systab->RuntimeServices;

        /* Use runtime services to power off system */
        rs->ResetSystem ( EfiResetShutdown, 0, 0, NULL );

        /* Should never happen */
        return -ECANCELED;
}

References ECANCELED, efi_systab, EfiResetShutdown, NULL, EFI_RUNTIME_SERVICES::ResetSystem, and EFI_SYSTEM_TABLE::RuntimeServices.

PROVIDE_REBOOT() [1/2]

PROVIDE_REBOOT	(	efi	,
		reboot	,
		efi_reboot
	)

PROVIDE_REBOOT() [2/2]

PROVIDE_REBOOT	(	efi	,
		poweroff	,
		efi_poweroff
	)