Minoca-os/uefi/plat/beagbone/memmap.c

/*++

Copyright (c) 2014 Minoca Corp. All Rights Reserved

Module Name:

    memmap.c

Abstract:

    This module implements support for returning the initial memory map on the
    TI BeagleBone Black.

Author:

    Evan Green 19-Dec-2014

Environment:

    Firmware

--*/

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

#include <uefifw.h>
#include "bbonefw.h"
#include <minoca/soc/am335x.h>

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

#define BEAGLEBONE_BLACK_BOARD_MEMORY_MAP_SIZE  \
    (sizeof(EfiBeagleBoneBlackMemoryMap) /      \
     sizeof(EfiBeagleBoneBlackMemoryMap[0]))

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

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

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

//
// Define the initial memory map.
//

EFI_MEMORY_DESCRIPTOR EfiBeagleBoneBlackMemoryMap[] = {
    {
        EfiConventionalMemory,
        0,
        BEAGLE_BONE_BLACK_RAM_START,
        0,
        BEAGLE_BONE_BLACK_RAM_SIZE / EFI_PAGE_SIZE,
        0
    },
    {
        EfiRuntimeServicesData,
        0,
        AM335_PRCM_REGISTERS,
        0,
        EFI_SIZE_TO_PAGES(AM335_PRCM_SIZE),
        EFI_MEMORY_UC | EFI_MEMORY_RUNTIME
    },
    {
        EfiRuntimeServicesData,
        0,
        AM335_RTC_BASE,
        0,
        EFI_SIZE_TO_PAGES(AM335_RTC_SIZE),
        EFI_MEMORY_UC | EFI_MEMORY_RUNTIME
    },

};

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

EFI_STATUS
EfiPlatformGetInitialMemoryMap (
    EFI_MEMORY_DESCRIPTOR **Map,
    UINTN *MapSize
    )

/*++

Routine Description:

    This routine returns the initial platform memory map to the EFI core. The
    core maintains this memory map. The memory map returned does not need to
    take into account the firmare image itself or stack, the EFI core will
    reserve those regions automatically.

Arguments:

    Map - Supplies a pointer where the array of memory descriptors constituting
        the initial memory map is returned on success. The EFI core will make
        a copy of these descriptors, so they can be in read-only or
        temporary memory.

    MapSize - Supplies a pointer where the number of elements in the initial
        memory map will be returned on success.

Return Value:

    EFI status code.

--*/

{

    *Map = EfiBeagleBoneBlackMemoryMap;
    *MapSize = BEAGLEBONE_BLACK_BOARD_MEMORY_MAP_SIZE;
    return EFI_SUCCESS;
}

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