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/** @file
Copyright (c) 2013-2014, ARM Ltd. All rights reserved.<BR>
Copyright (c) 2017, Linaro. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Library/AndroidBootImgLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <Library/DevicePathLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Protocol/BlockIo.h>
#include <Protocol/DevicePathFromText.h>
/* Validate the node is media hard drive type */
EFI_STATUS
ValidateAndroidMediaDevicePath (
IN EFI_DEVICE_PATH *DevicePath
)
{
EFI_DEVICE_PATH_PROTOCOL *Node, *NextNode;
NextNode = DevicePath;
while (NextNode != NULL) {
Node = NextNode;
if (Node->Type == MEDIA_DEVICE_PATH &&
Node->SubType == MEDIA_HARDDRIVE_DP) {
return EFI_SUCCESS;
}
NextNode = NextDevicePathNode (Node);
}
return EFI_INVALID_PARAMETER;
}
EFI_STATUS
EFIAPI
AndroidBootAppEntryPoint (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
CHAR16 *BootPathStr;
EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL *EfiDevicePathFromTextProtocol;
EFI_DEVICE_PATH *DevicePath;
EFI_BLOCK_IO_PROTOCOL *BlockIo;
UINT32 MediaId, BlockSize;
VOID *Buffer;
EFI_HANDLE Handle;
UINTN BootImgSize;
BootPathStr = (CHAR16 *)PcdGetPtr (PcdAndroidBootDevicePath);
ASSERT (BootPathStr != NULL);
Status = gBS->LocateProtocol (&gEfiDevicePathFromTextProtocolGuid, NULL,
(VOID **)&EfiDevicePathFromTextProtocol);
ASSERT_EFI_ERROR(Status);
DevicePath = (EFI_DEVICE_PATH *)EfiDevicePathFromTextProtocol->ConvertTextToDevicePath (BootPathStr);
ASSERT (DevicePath != NULL);
Status = ValidateAndroidMediaDevicePath (DevicePath);
if (EFI_ERROR (Status)) {
return Status;
}
Status = gBS->LocateDevicePath (&gEfiDevicePathProtocolGuid,
&DevicePath, &Handle);
if (EFI_ERROR (Status)) {
return Status;
}
Status = gBS->OpenProtocol (
Handle,
&gEfiBlockIoProtocolGuid,
(VOID **) &BlockIo,
gImageHandle,
NULL,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "Failed to get BlockIo: %r\n", Status));
return Status;
}
MediaId = BlockIo->Media->MediaId;
BlockSize = BlockIo->Media->BlockSize;
Buffer = AllocatePages (EFI_SIZE_TO_PAGES (sizeof(ANDROID_BOOTIMG_HEADER)));
if (Buffer == NULL) {
return EFI_BUFFER_TOO_SMALL;
}
/* Load header of boot.img */
Status = BlockIo->ReadBlocks (
BlockIo,
MediaId,
0,
BlockSize,
Buffer
);
Status = AndroidBootImgGetImgSize (Buffer, &BootImgSize);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "Failed to get AndroidBootImg Size: %r\n", Status));
return Status;
}
BootImgSize = ALIGN_VALUE (BootImgSize, BlockSize);
FreePages (Buffer, EFI_SIZE_TO_PAGES (sizeof(ANDROID_BOOTIMG_HEADER)));
/* Both PartitionStart and PartitionSize are counted as block size. */
Buffer = AllocatePages (EFI_SIZE_TO_PAGES (BootImgSize));
if (Buffer == NULL) {
return EFI_BUFFER_TOO_SMALL;
}
/* Load header of boot.img */
Status = BlockIo->ReadBlocks (
BlockIo,
MediaId,
0,
BootImgSize,
Buffer
);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "Failed to read blocks: %r\n", Status));
goto EXIT;
}
Status = AndroidBootImgBoot (Buffer, BootImgSize);
EXIT:
return Status;
}
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