Minoca-os/uefi/plat/panda/runtime/reboot.c

/*++

Copyright (c) 2014 Minoca Corp. All Rights Reserved

Module Name:

    reboot.c

Abstract:

    This module implements reset support on the TI OMAP4430.

Author:

    Evan Green 26-Mar-2014

Environment:

    Firmware

--*/

//
// ------------------------------------------------------------------- Includes
//

#include <uefifw.h>
#include "../pandafw.h"

//
// ---------------------------------------------------------------- Definitions
//

#define OMAP4_PRM_DEVICE_RESET_CONTROL 0x00

#define OMAP4_PRM_DEVICE_RESET_CONTROL_WARM_RESET 0x00000002

//
// ------------------------------------------------------ Data Type Definitions
//

//
// ----------------------------------------------- Internal Function Prototypes
//

//
// -------------------------------------------------------------------- Globals
//

VOID *EfiOmap4PrmDeviceBase =
                      (VOID *)(OMAP4430_PRM_BASE + OMAP4430_PRM_DEVICE_OFFSET);

//
// ------------------------------------------------------------------ Functions
//

EFIAPI
VOID
EfipOmap4ResetSystem (
    EFI_RESET_TYPE ResetType,
    EFI_STATUS ResetStatus,
    UINTN DataSize,
    VOID *ResetData
    )

/*++

Routine Description:

    This routine resets the entire platform.

Arguments:

    ResetType - Supplies the type of reset to perform.

    ResetStatus - Supplies the status code for this reset.

    DataSize - Supplies the size of the reset data.

    ResetData - Supplies an optional pointer for reset types of cold, warm, or
        shutdown to a null-terminated string, optionally followed by additional
        binary data.

Return Value:

    None. This routine does not return.

--*/

{

    volatile UINT32 *ResetControl;

    //
    // Attempt to flush non-volatile variable data out to storage.
    //

    EfiCoreFlushVariableData();
    ResetControl = EfiOmap4PrmDeviceBase + OMAP4_PRM_DEVICE_RESET_CONTROL;
    *ResetControl = *ResetControl | OMAP4_PRM_DEVICE_RESET_CONTROL_WARM_RESET;
    while (TRUE) {
        if ((*ResetControl & OMAP4_PRM_DEVICE_RESET_CONTROL_WARM_RESET) != 0) {
            break;
        }
    }

    //
    // Execution really should not get this far.
    //

    return;
}

//
// --------------------------------------------------------- Internal Functions
//