ArmPlatformPkg/Bds: Added support for booting legacy kernel from BDS

[mirror_edk2.git] / ArmPlatformPkg / Bds / BootLinux.c

diff --git a/ArmPlatformPkg/Bds/BootLinux.c b/ArmPlatformPkg/Bds/BootLinux.c
new file mode 100644 (file)
index 0000000..0445e89
--- /dev/null
+++ b/ArmPlatformPkg/Bds/BootLinux.c
@@ -0,0 +1,124 @@
+/** @file\r
+*\r
+*  Copyright (c) 2011 - 2015, ARM Limited. All rights reserved.\r
+*\r
+*  This program and the accompanying materials\r
+*  are licensed and made available under the terms and conditions of the BSD License\r
+*  which accompanies this distribution.  The full text of the license may be found at\r
+*  http://opensource.org/licenses/bsd-license.php\r
+*\r
+*  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+*  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+*\r
+**/\r
+\r
+#include "BdsInternal.h"\r
+\r
+// This GUID is defined in the INGF file of ArmPkg/Application/LinuxLoader\r
+CONST EFI_GUID mLinuxLoaderAppGuid = { 0x701f54f2, 0x0d70, 0x4b89, { 0xbc, 0x0a, 0xd9, 0xca, 0x25, 0x37, 0x90, 0x59 }};\r
+\r
+// Device path of the EFI Linux Loader in the Firmware Volume\r
+EFI_DEVICE_PATH* mLinuxLoaderDevicePath = NULL;\r
+\r
+STATIC\r
+BOOLEAN\r
+HasFilePathEfiExtension (\r
+  IN CHAR16* FilePath\r
+  )\r
+{\r
+  return (StrCmp (FilePath + (StrSize (FilePath) / sizeof (CHAR16)) - 5, L".EFI") == 0) ||\r
+         (StrCmp (FilePath + (StrSize (FilePath) / sizeof (CHAR16)) - 5, L".efi") == 0);\r
+}\r
+\r
+/**\r
+ * This function check if the DevicePath defines an EFI binary\r
+ *\r
+ * This function is used when the BDS support Linux loader to\r
+ * detect if the binary is an EFI application or potentially a\r
+ * Linux kernel.\r
+ */\r
+EFI_STATUS\r
+IsEfiBinary (\r
+  IN  EFI_DEVICE_PATH* DevicePath,\r
+  OUT BOOLEAN          *EfiBinary\r
+  )\r
+{\r
+  EFI_STATUS              Status;\r
+  CHAR16*                 FileName;\r
+  EFI_DEVICE_PATH*        PrevDevicePathNode;\r
+  EFI_DEVICE_PATH*        DevicePathNode;\r
+  EFI_PHYSICAL_ADDRESS    Image;\r
+  UINTN                   FileSize;\r
+  EFI_IMAGE_DOS_HEADER*   DosHeader;\r
+  UINTN                   PeCoffHeaderOffset;\r
+  EFI_IMAGE_NT_HEADERS32* NtHeader;\r
+\r
+  ASSERT (EfiBinary != NULL);\r
+\r
+  //\r
+  // Check if the last node of the device path is a FilePath node\r
+  //\r
+  PrevDevicePathNode = NULL;\r
+  DevicePathNode = DevicePath;\r
+  while ((DevicePathNode != NULL) && !IsDevicePathEnd (DevicePathNode)) {\r
+    PrevDevicePathNode = DevicePathNode;\r
+    DevicePathNode     = NextDevicePathNode (DevicePathNode);\r
+  }\r
+\r
+  if ((PrevDevicePathNode != NULL) &&\r
+      (PrevDevicePathNode->Type == MEDIA_DEVICE_PATH) &&\r
+      (PrevDevicePathNode->SubType == MEDIA_FILEPATH_DP))\r
+  {\r
+    FileName = ((FILEPATH_DEVICE_PATH*)PrevDevicePathNode)->PathName;\r
+  } else {\r
+    FileName = NULL;\r
+  }\r
+\r
+  if (FileName == NULL) {\r
+    Print (L"Is an EFI Application? ");\r
+    Status = GetHIInputBoolean (EfiBinary);\r
+    if (EFI_ERROR (Status)) {\r
+      return EFI_ABORTED;\r
+    }\r
+  } else if (HasFilePathEfiExtension (FileName)) {\r
+    *EfiBinary = TRUE;\r
+  } else {\r
+    // Check if the file exist\r
+    Status = BdsLoadImage (DevicePath, AllocateAnyPages, &Image, &FileSize);\r
+    if (!EFI_ERROR (Status)) {\r
+\r
+      DosHeader = (EFI_IMAGE_DOS_HEADER *)(UINTN) Image;\r
+      if (DosHeader->e_magic == EFI_IMAGE_DOS_SIGNATURE) {\r
+        //\r
+        // DOS image header is present,\r
+        // so read the PE header after the DOS image header.\r
+        //\r
+        PeCoffHeaderOffset = DosHeader->e_lfanew;\r
+      } else {\r
+        PeCoffHeaderOffset = 0;\r
+      }\r
+\r
+      //\r
+      // Check PE/COFF image.\r
+      //\r
+      NtHeader = (EFI_IMAGE_NT_HEADERS32 *)(UINTN) (Image + PeCoffHeaderOffset);\r
+      if (NtHeader->Signature != EFI_IMAGE_NT_SIGNATURE) {\r
+        *EfiBinary = FALSE;\r
+      } else {\r
+        *EfiBinary = TRUE;\r
+      }\r
+\r
+      // Free memory\r
+      gBS->FreePages (Image, EFI_SIZE_TO_PAGES (FileSize));\r
+    } else {\r
+      // If we did not manage to open it then ask for the type\r
+      Print (L"Is an EFI Application? ");\r
+      Status = GetHIInputBoolean (EfiBinary);\r
+      if (EFI_ERROR (Status)) {\r
+        return EFI_ABORTED;\r
+      }\r
+    }\r
+  }\r
+\r
+  return EFI_SUCCESS;\r
+}\r