UEFI 基础教程 （四） - 运行第一个DXE Driver

一、 编写源代码

1. 编写C:\edkii\OvmfPkg\MyHelloWorldDXEDriver\MyHelloWorldDXEDriver.c

   #include <uefi.h> 
   #include <Library/UefiLib.h> 
   #include <Library/BaseLib.h>
   #include <Library/DebugLib.h>
   #include <Library/BaseMemoryLib.h>
   #include <Library/UefiDriverEntryPoint.h>
   #include <Library/UefiBootServicesTableLib.h>
   
   EFI_STATUS
   EFIAPI
   MyHelloWorldDXEDriverEntry(
     IN EFI_HANDLE        ImageHandle,
     IN EFI_SYSTEM_TABLE  *SystemTable
   )
   { 
     EFI_STATUS                              Status = EFI_SUCCESS;
     DEBUG ((EFI_D_ERROR , "MyHelloWorldDXEDriverEntry Start..\n"));
     DEBUG ((EFI_D_ERROR ,"MyHelloWorldDXEDriverEntry Endt..\n"));
     return Status;
   }
   

2. 编写C:\edkii\OvmfPkg\MyHelloWorldDXEDriver\MyHelloWorldDXEDriver.inf

   [Defines] 
     INF_VERSION = 0x00010006 
     BASE_NAME = MyHelloWorldDXEDriver 
     FILE_GUID = 6AE7DE6E-F0AF-485f-9937-EB70FDCFC82F
     MODULE_TYPE = UEFI_DRIVER
     VERSION_STRING = 1.0
     ENTRY_POINT = MyHelloWorldDXEDriverEntry 
     
   [Sources] 
     MyHelloWorldDXEDriver.c 
     
   [Packages]
     MdePkg/MdePkg.dec
     ShellPkg/ShellPkg.dec 
     MdeModulePkg/MdeModulePkg.dec
     
   [LibraryClasses]
     UefiDriverEntryPoint
     BaseLib
     BaseMemoryLib
     DebugLib
     DevicePathLib
     UefiBootServicesTableLib
     MemoryAllocationLib
     UefiLib
     
   [depex]
     TRUE
   

3. 修改C:\edkii\OvmfPkg\OvmfPkgX64.dsc

   [Components]
   ...    
   #
   # DXE Phase modules
   #
   OvmfPkg/MyHelloWorldDXEDriver/MyHelloWorldDXEDriver.inf
   ...
   

4. 修改C:\edkii\OvmfPkg\OvmfPkgX64.fdf

   [FV.DXEFV]
   ...
   #
   # DXE Phase modules
   #
   INF  OvmfPkg/MyHelloWorldDXEDriver/MyHelloWorldDXEDriver.inf
   ...
   

二、 编译生成EFI文件

运行edksetup.bat编译整个OvmfPkg Package

三、 运行HelloWorld DXE Driver

1. 拷贝 C:\edkii\Build\OvmfX64\DEBUG_VS2013x86\FV\OVMF.fd 到C:\qemu
2. 执行setup-qemu-x64.bat | findstr MyHelloWorldDXEDriver ,如下
   

四、 小结

UEFI DXE和UEFI PEIM的写法区别:

1. INF文件中的MODULE_TYPE不同（PEIM、UEFI_DRIVER）
2. FDF 文件中放置位置不同
   PEIM需要放在[FV.PEIFV]下，而 DXE 放在[FV.DXEFV]中

DXEDriver DEMO源码