1 files changed, 124 insertions, 0 deletions
diff --git a/ArmPlatformPkg/Bds/BootLinux.c b/ArmPlatformPkg/Bds/BootLinux.c
new file mode 100644
index 0000000000..0445e894e1
--- /dev/null
+++ b/ArmPlatformPkg/Bds/BootLinux.c
@@ -0,0 +1,124 @@
+/** @file
+*
+*  Copyright (c) 2011 - 2015, 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 "BdsInternal.h"
+
+// This GUID is defined in the INGF file of ArmPkg/Application/LinuxLoader
+CONST EFI_GUID mLinuxLoaderAppGuid = { 0x701f54f2, 0x0d70, 0x4b89, { 0xbc, 0x0a, 0xd9, 0xca, 0x25, 0x37, 0x90, 0x59 }};
+
+// Device path of the EFI Linux Loader in the Firmware Volume
+EFI_DEVICE_PATH* mLinuxLoaderDevicePath = NULL;
+
+STATIC
+BOOLEAN
+HasFilePathEfiExtension (
+  IN CHAR16* FilePath
+  )
+{
+  return (StrCmp (FilePath + (StrSize (FilePath) / sizeof (CHAR16)) - 5, L".EFI") == 0) ||
+         (StrCmp (FilePath + (StrSize (FilePath) / sizeof (CHAR16)) - 5, L".efi") == 0);
+}
+
+/**
+ * This function check if the DevicePath defines an EFI binary
+ *
+ * This function is used when the BDS support Linux loader to
+ * detect if the binary is an EFI application or potentially a
+ * Linux kernel.
+ */
+EFI_STATUS
+IsEfiBinary (
+  IN  EFI_DEVICE_PATH* DevicePath,
+  OUT BOOLEAN          *EfiBinary
+  )
+{
+  EFI_STATUS              Status;
+  CHAR16*                 FileName;
+  EFI_DEVICE_PATH*        PrevDevicePathNode;
+  EFI_DEVICE_PATH*        DevicePathNode;
+  EFI_PHYSICAL_ADDRESS    Image;
+  UINTN                   FileSize;
+  EFI_IMAGE_DOS_HEADER*   DosHeader;
+  UINTN                   PeCoffHeaderOffset;
+  EFI_IMAGE_NT_HEADERS32* NtHeader;
+
+  ASSERT (EfiBinary != NULL);
+
+  //
+  // Check if the last node of the device path is a FilePath node
+  //
+  PrevDevicePathNode = NULL;
+  DevicePathNode = DevicePath;
+  while ((DevicePathNode != NULL) && !IsDevicePathEnd (DevicePathNode)) {
+    PrevDevicePathNode = DevicePathNode;
+    DevicePathNode     = NextDevicePathNode (DevicePathNode);
+  }
+
+  if ((PrevDevicePathNode != NULL) &&
+      (PrevDevicePathNode->Type == MEDIA_DEVICE_PATH) &&
+      (PrevDevicePathNode->SubType == MEDIA_FILEPATH_DP))
+  {
+    FileName = ((FILEPATH_DEVICE_PATH*)PrevDevicePathNode)->PathName;
+  } else {
+    FileName = NULL;
+  }
+
+  if (FileName == NULL) {
+    Print (L"Is an EFI Application? ");
+    Status = GetHIInputBoolean (EfiBinary);
+    if (EFI_ERROR (Status)) {
+      return EFI_ABORTED;
+    }
+  } else if (HasFilePathEfiExtension (FileName)) {
+    *EfiBinary = TRUE;
+  } else {
+    // Check if the file exist
+    Status = BdsLoadImage (DevicePath, AllocateAnyPages, &Image, &FileSize);
+    if (!EFI_ERROR (Status)) {
+
+      DosHeader = (EFI_IMAGE_DOS_HEADER *)(UINTN) Image;
+      if (DosHeader->e_magic == EFI_IMAGE_DOS_SIGNATURE) {
+        //
+        // DOS image header is present,
+        // so read the PE header after the DOS image header.
+        //
+        PeCoffHeaderOffset = DosHeader->e_lfanew;
+      } else {
+        PeCoffHeaderOffset = 0;
+      }
+
+      //
+      // Check PE/COFF image.
+      //
+      NtHeader = (EFI_IMAGE_NT_HEADERS32 *)(UINTN) (Image + PeCoffHeaderOffset);
+      if (NtHeader->Signature != EFI_IMAGE_NT_SIGNATURE) {
+        *EfiBinary = FALSE;
+      } else {
+        *EfiBinary = TRUE;
+      }
+
+      // Free memory
+      gBS->FreePages (Image, EFI_SIZE_TO_PAGES (FileSize));
+    } else {
+      // If we did not manage to open it then ask for the type
+      Print (L"Is an EFI Application? ");
+      Status = GetHIInputBoolean (EfiBinary);
+      if (EFI_ERROR (Status)) {
+        return EFI_ABORTED;
+      }
+    }
+  }
+
+  return EFI_SUCCESS;
+}