diff options
| author | oliviermartin <oliviermartin@6f19259b-4bc3-4df7-8a09-765794883524> | 2011-09-22 22:57:03 +0000 |
|---|---|---|
| committer | oliviermartin <oliviermartin@6f19259b-4bc3-4df7-8a09-765794883524> | 2011-09-22 22:57:03 +0000 |
| commit | 75e4db2d3bb063e767f94c78259760755eedbaff (patch) | |
| tree | 83cb961710b29777f1d1f4fcf3f0d3319060ef8a /ArmPkg/Application/LinuxLoader/LinuxAtagLoader.c | |
| parent | d9325c8e4f858abe7b888b21df4bd0a34864492f (diff) | |
| download | edk2-platforms-75e4db2d3bb063e767f94c78259760755eedbaff.tar.xz | |
ArmPkg/Application/LinuxLoader: Create a Linux Loader EFI application
There are two variants of the Linux Loader EFI application:
- the ATAG version 'LinuxAtagLoader.inf': expect to start an ATAG 'zImage'
in the same directory as the EFI application
- the FDT version 'LinuxFdtLoader.inf': load the FDT blob 'platform.dtb'
and the FDT 'zImage' from the same directory as the EFI application.
When these applications are started without any argument, a menu appears
to the user to create/update a boot entry.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12410 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'ArmPkg/Application/LinuxLoader/LinuxAtagLoader.c')
| -rw-r--r-- | ArmPkg/Application/LinuxLoader/LinuxAtagLoader.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/ArmPkg/Application/LinuxLoader/LinuxAtagLoader.c b/ArmPkg/Application/LinuxLoader/LinuxAtagLoader.c new file mode 100644 index 0000000000..50a4b474cf --- /dev/null +++ b/ArmPkg/Application/LinuxLoader/LinuxAtagLoader.c @@ -0,0 +1,103 @@ +/** @file
+*
+* Copyright (c) 2011, ARM Limited. All rights reserved.
+*
+* 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 "LinuxInternal.h"
+
+#include <Library/PrintLib.h>
+#include <Library/UefiApplicationEntryPoint.h>
+
+/**
+ The user Entry Point for Application. The user code starts with this function
+ as the real entry point for the application.
+
+ @param[in] ImageHandle The firmware allocated handle for the EFI image.
+ @param[in] SystemTable A pointer to the EFI System Table.
+
+ @retval EFI_SUCCESS The entry point is executed successfully.
+ @retval other Some error occurs when executing this entry point.
+
+**/
+EFI_STATUS
+EFIAPI
+UefiMain (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status;
+ EFI_LOADED_IMAGE_PROTOCOL *LoadedImage;
+ LINUX_LOADER_OPTIONAL_DATA* LinuxOptionalData;
+ EFI_DEVICE_PATH* DevicePathKernel;
+ EFI_DEVICE_PATH* InitrdDevicePath;
+ CHAR16* OptionalDataInitrd;
+ CHAR8* OptionalDataArguments;
+ CHAR16* Initrd;
+
+ Status = gBS->HandleProtocol (ImageHandle, &gEfiLoadedImageProtocolGuid, (VOID **)&LoadedImage);
+ ASSERT_EFI_ERROR (Status);
+
+ if (LoadedImage->LoadOptionsSize == 0) {
+ Status = LinuxLoaderConfig (LoadedImage);
+ } else {
+ // Ensure the signature is correct
+ LinuxOptionalData = (LINUX_LOADER_OPTIONAL_DATA*)LoadedImage->LoadOptions;
+ if (LinuxOptionalData->Signature != LINUX_LOADER_SIGNATURE) {
+ return EFI_UNSUPPORTED;
+ }
+
+ // Generate the File Path Node for the Linux Kernel
+ DevicePathKernel = FileDevicePath (LoadedImage->DeviceHandle, LINUX_KERNEL_NAME);
+
+ if (LinuxOptionalData->CmdLineLength > 0) {
+ OptionalDataArguments = (CHAR8*)LinuxOptionalData + sizeof(LINUX_LOADER_OPTIONAL_DATA);
+ } else {
+ OptionalDataArguments = NULL;
+ }
+
+ if (LinuxOptionalData->InitrdPathListLength > 0) {
+ if (OptionalDataArguments != NULL) {
+ OptionalDataInitrd = (CHAR16*)(OptionalDataArguments + LinuxOptionalData->CmdLineLength);
+ } else {
+ OptionalDataInitrd = (CHAR16*)LinuxOptionalData + sizeof(LINUX_LOADER_OPTIONAL_DATA);
+ }
+
+ // If pointer not aligned
+ if ((UINTN)OptionalDataInitrd & 0x1) {
+ Initrd = (CHAR16*)AllocateCopyPool (LinuxOptionalData->InitrdPathListLength, OptionalDataInitrd);
+ } else {
+ Initrd = OptionalDataInitrd;
+ }
+
+ InitrdDevicePath = FileDevicePath (LoadedImage->DeviceHandle, Initrd);
+ } else {
+ OptionalDataInitrd = NULL;
+ InitrdDevicePath = NULL;
+ Initrd = NULL;
+ }
+
+ // Load and Start the Linux Kernel (we should never return)
+ Status = BdsBootLinuxAtag (DevicePathKernel, InitrdDevicePath, OptionalDataArguments);
+
+ if ((UINTN)OptionalDataInitrd & 0x1) {
+ FreePool (Initrd);
+ }
+
+ FreePool (DevicePathKernel);
+ if (InitrdDevicePath) {
+ FreePool (InitrdDevicePath);
+ }
+ }
+
+ return Status;
+}
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