EmbeddedPkg/Application/AndroidFastboot/Arm/BootAndroidBootImg.c

   1 /** @file
   2
   3   Copyright (c) 2013-2015, ARM Ltd. All rights reserved.<BR>
   4
   5   This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #include "AndroidFastbootApp.h"
  16
  17 #include <Protocol/DevicePath.h>
  18
  19 #include <Library/BdsLib.h>
  20 #include <Library/DevicePathLib.h>
  21 #include <Library/UefiBootServicesTableLib.h>
  22 #include <Library/UefiLib.h>
  23
  24 // Device Path representing an image in memory
  25 #pragma pack(1)
  26 typedef struct {
  27   MEMMAP_DEVICE_PATH                      Node1;
  28   EFI_DEVICE_PATH_PROTOCOL                End;
  29 } MEMORY_DEVICE_PATH;
  30 #pragma pack()
  31
  32 STATIC CONST MEMORY_DEVICE_PATH MemoryDevicePathTemplate =
  33 {
  34   {
  35     {
  36       HARDWARE_DEVICE_PATH,
  37       HW_MEMMAP_DP,
  38       {
  39         (UINT8)(sizeof (MEMMAP_DEVICE_PATH)),
  40         (UINT8)((sizeof (MEMMAP_DEVICE_PATH)) >> 8),
  41       },
  42     }, // Header
  43     0, // StartingAddress (set at runtime)
  44     0  // EndingAddress   (set at runtime)
  45   }, // Node1
  46   {
  47     END_DEVICE_PATH_TYPE,
  48     END_ENTIRE_DEVICE_PATH_SUBTYPE,
  49     { sizeof (EFI_DEVICE_PATH_PROTOCOL), 0 }
  50   } // End
  51 };
  52
  53 EFI_STATUS
  54 BootAndroidBootImg (
  55   IN UINTN    BufferSize,
  56   IN VOID    *Buffer
  57   )
  58 {
  59   EFI_STATUS                          Status;
  60   CHAR8                               KernelArgs[BOOTIMG_KERNEL_ARGS_SIZE];
  61   VOID                               *Kernel;
  62   UINTN                               KernelSize;
  63   VOID                               *Ramdisk;
  64   UINTN                               RamdiskSize;
  65   MEMORY_DEVICE_PATH                  KernelDevicePath;
  66   CHAR16                              *LoadOptions, *NewLoadOptions;
  67
  68   Status = ParseAndroidBootImg (
  69             Buffer,
  70             &Kernel,
  71             &KernelSize,
  72             &Ramdisk,
  73             &RamdiskSize,
  74             KernelArgs
  75             );
  76   if (EFI_ERROR (Status)) {
  77     return Status;
  78   }
  79
  80   KernelDevicePath = MemoryDevicePathTemplate;
  81
  82   // Have to cast to UINTN before casting to EFI_PHYSICAL_ADDRESS in order to
  83   // appease GCC.
  84   KernelDevicePath.Node1.StartingAddress = (EFI_PHYSICAL_ADDRESS)(UINTN) Kernel;
  85   KernelDevicePath.Node1.EndingAddress   = (EFI_PHYSICAL_ADDRESS)(UINTN) Kernel + KernelSize;
  86
  87   // Initialize Linux command line
  88   LoadOptions = CatSPrint (NULL, L"%a", KernelArgs);
  89   if (LoadOptions == NULL) {
  90     return EFI_OUT_OF_RESOURCES;
  91   }
  92
  93   if (RamdiskSize != 0) {
  94     NewLoadOptions = CatSPrint (LoadOptions, L" initrd=0x%x,0x%x",
  95                        (UINTN)Ramdisk, RamdiskSize);
  96     FreePool (LoadOptions);
  97     if (NewLoadOptions == NULL) {
  98       return EFI_OUT_OF_RESOURCES;
  99     }
 100     LoadOptions = NewLoadOptions;
 101   }
 102
 103   Status = BdsStartEfiApplication (gImageHandle,
 104              (EFI_DEVICE_PATH_PROTOCOL *) &KernelDevicePath,
 105              StrSize (LoadOptions),
 106              LoadOptions);
 107   if (EFI_ERROR (Status)) {
 108     DEBUG ((EFI_D_ERROR, "Couldn't Boot Linux: %d\n", Status));
 109     Status = EFI_DEVICE_ERROR;
 110     goto FreeLoadOptions;
 111   }
 112
 113   // If we got here we do a confused face because BootLinuxFdt returned,
 114   // reporting success.
 115   DEBUG ((EFI_D_ERROR, "WARNING: BdsBootLinuxFdt returned EFI_SUCCESS.\n"));
 116   return EFI_SUCCESS;
 117
 118 FreeLoadOptions:
 119   FreePool (LoadOptions);
 120   return Status;
 121 }