diff options
| author | Olivier Martin <olivier.martin@arm.com> | 2014-03-05 04:15:44 +0000 |
|---|---|---|
| committer | oliviermartin <oliviermartin@6f19259b-4bc3-4df7-8a09-765794883524> | 2014-03-05 04:15:44 +0000 |
| commit | f6755908dee0d71926ec4f440edd384523746ef6 (patch) | |
| tree | 83dae79d1017391bac3ea9bf606f68811bb3cadc /EmbeddedPkg/Application/AndroidFastboot/AndroidBootImg.c | |
| parent | ddd1436622131ced99193700dcd7dca5dc0aa315 (diff) | |
| download | edk2-platforms-f6755908dee0d71926ec4f440edd384523746ef6.tar.xz | |
EmbeddedPkg/AndroidFastboot: Introduce Android FastBoot Application
This application enables Android FastBoot on UEFI.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Olivier Martin <olivier.martin@arm.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15312 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'EmbeddedPkg/Application/AndroidFastboot/AndroidBootImg.c')
| -rw-r--r-- | EmbeddedPkg/Application/AndroidFastboot/AndroidBootImg.c | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/EmbeddedPkg/Application/AndroidFastboot/AndroidBootImg.c b/EmbeddedPkg/Application/AndroidFastboot/AndroidBootImg.c new file mode 100644 index 0000000000..bbca90fc08 --- /dev/null +++ b/EmbeddedPkg/Application/AndroidFastboot/AndroidBootImg.c @@ -0,0 +1,90 @@ +/** @file
+
+ Copyright (c) 2013-2014, ARM Ltd. All rights reserved.<BR>
+
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include "AndroidFastbootApp.h"
+
+#define BOOT_MAGIC "ANDROID!"
+#define BOOT_MAGIC_LENGTH sizeof (BOOT_MAGIC) - 1
+
+// Check Val (unsigned) is a power of 2 (has only one bit set)
+#define IS_POWER_OF_2(Val) (Val != 0 && ((Val & (Val - 1)) == 0))
+
+// No documentation for this really - sizes of fields has been determined
+// empirically.
+#pragma pack(1)
+typedef struct {
+ CHAR8 BootMagic[BOOT_MAGIC_LENGTH];
+ UINT32 KernelSize;
+ UINT32 KernelAddress;
+ UINT32 RamdiskSize;
+ UINT32 RamdiskAddress;
+ UINT32 SecondStageBootloaderSize;
+ UINT32 SecondStageBootloaderAddress;
+ UINT32 KernelTaggsAddress;
+ UINT32 PageSize;
+ UINT32 Reserved[2];
+ CHAR8 ProductName[16];
+ CHAR8 KernelArgs[BOOTIMG_KERNEL_ARGS_SIZE];
+ UINT32 Id[32];
+} ANDROID_BOOTIMG_HEADER;
+#pragma pack()
+
+// Find the kernel and ramdisk in an Android boot.img.
+// return EFI_INVALID_PARAMTER if the boot.img is invalid (i.e. doesn't have the
+// right magic value),
+// return EFI_NOT_FOUND if there was no kernel in the boot.img.
+// Note that the Ramdisk is optional - *Ramdisk won't be touched if it isn't
+// present, but RamdiskSize will be set to 0.
+EFI_STATUS
+ParseAndroidBootImg (
+ IN VOID *BootImg,
+ OUT VOID **Kernel,
+ OUT UINTN *KernelSize,
+ OUT VOID **Ramdisk,
+ OUT UINTN *RamdiskSize,
+ OUT CHAR8 *KernelArgs
+ )
+{
+ ANDROID_BOOTIMG_HEADER *Header;
+ UINT8 *BootImgBytePtr;
+
+ // Cast to UINT8 so we can do pointer arithmetic
+ BootImgBytePtr = (UINT8 *) BootImg;
+
+ Header = (ANDROID_BOOTIMG_HEADER *) BootImg;
+
+ if (AsciiStrnCmp (Header->BootMagic, BOOT_MAGIC, BOOT_MAGIC_LENGTH) != 0) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (Header->KernelSize == 0) {
+ return EFI_NOT_FOUND;
+ }
+
+ ASSERT (IS_POWER_OF_2 (Header->PageSize));
+
+ *KernelSize = Header->KernelSize;
+ *Kernel = BootImgBytePtr + Header->PageSize;
+ *RamdiskSize = Header->RamdiskSize;
+
+ if (Header->RamdiskSize != 0) {
+ *Ramdisk = (VOID *) (BootImgBytePtr
+ + Header->PageSize
+ + ALIGN_VALUE (Header->KernelSize, Header->PageSize));
+ }
+
+ AsciiStrnCpy (KernelArgs, Header->KernelArgs, BOOTIMG_KERNEL_ARGS_SIZE);
+
+ return EFI_SUCCESS;
+}
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