ArmPlatformPkg

ArmPlatformPkg supports UEFI for ARM delveopment boards and their drivers (ARM RealView EB/RTSM, ARM Versatile Express. This package also exposes some common components (such as SEC, PEIMs, BDS) which can be reused by ARM platforms to make the port easier. These components support UniCore and MPCore and are tested on real hardware.

Table of Contents How to port Tianocore/UEFI to a new ARM Platform Case 1: EDK2 from cold boot Case 2: EDK2 as a 2nd stage Boot Loader Source Repository Instruction to build ARM Versatile Express Development Board

How to port Tianocore/UEFI to a new ARM Platform

There are actually two cases:

• Case 1 - EDK2 from cold boot: the Tianocore project is used to produce the boot firmware that will control the boot process from the first instruction executed after cold boot to the start of the operating system on your platform
• Case 2 - EDK2 as a 2nd stage Boot Loader: the Tianocore project is only used to generate a 2nd (or 3rd) stage boot loader (such as the BeagleBoard)

Image:ARM-EDK2-Overview.png

Case 1: EDK2 from cold boot

1. Duplicate the ARM Platform reference DSC and FDF files

cp ArmPlatformPkg/ArmPlatformPkg.dsc [YOUR_PLATFORM_PKG]/[YOUR_PLATFORM].dsc
cp ArmPlatformPkg/ArmPlatformPkg.fdf [YOUR_PLATFORM_PKG]/[YOUR_PLATFORM].fdf

2. Implement ArmPlatformLib by copying ArmPlatformPkg/Library/ArmPlatformLibNull/

cp -a ArmPlatformPkg/Library/ArmPlatformLibNull [YOUR_PLATFORM_PKG]/Library/[YOUR_PLATFORM]Lib

3. Update ArmLib/ArmCpuLib/ArmPlatformLib to use the correct library in your DSC file:

  ArmLib|ArmPkg/Library/ArmLib/ArmV7/ArmV7Lib.inf
  ArmCpuLib|ArmPkg/Drivers/ArmCpuLib/ArmCortexA9Lib/ArmCortexA9Lib.inf
  ArmPlatformLib|ArmPlatformPkg/Library/ArmPlatformLibNull/ArmPlatformLibNull.inf

• ArmLib can be :

  - ArmPkg/Library/ArmLib/ArmV7/ArmV7Lib.inf
  - ArmPkg/Library/ArmLib/Arm11/Arm11Lib.inf

• ArmCpuLib can be:

  - ArmPkg/Drivers/ArmCpuLib/Arm11MpCoreLib/Arm11MpCoreLib.inf
  - ArmPkg/Drivers/ArmCpuLib/ArmCortexA8Lib/ArmCortexA8Lib.inf
  - ArmPkg/Drivers/ArmCpuLib/ArmCortexA9Lib/ArmCortexA9Lib.inf
  - ArmPkg/Drivers/ArmCpuLib/ArmCortexA15Lib/ArmCortexA15Lib.inf

• ArmPlatformLib must be [YOUR_PLATFORM_PKG]/Library/[YOUR_PLATFORM]Lib/[YOUR_PLATFORM]Lib.inf

4. Define the Secure / Monitor / Normal Stacks positions

  # Stacks for MPCores in Secure World
  gArmPlatformTokenSpaceGuid.PcdCPUCoresSecStackBase|0
  # Stacks for MPCores in Monitor Mode
  gArmPlatformTokenSpaceGuid.PcdCPUCoresSecMonStackBase|0
  # Stacks for MPCores in Normal World
  gArmPlatformTokenSpaceGuid.PcdCPUCoresStackBase|0

The Secure and Monitor stacks must be in Secure memory. And the Normal Stack in your Scratch RAM (or any memory initialized at the early stage of the boot process)

5. Define the Base and the Size of your System Memory (RAM)

  gArmTokenSpaceGuid.PcdSystemMemoryBase|0
  gArmTokenSpaceGuid.PcdSystemMemorySize|0

6. Implement and Update GicLib if required (if not ARM PL390 Generic Interrupt Controller)

7. Implement SerialPortLib, TimerLib, EfiResetSystemLib, RealTimeClockLib for your platform

Case 2: EDK2 as a 2nd stage Boot Loader

1. Duplicate the ARM Platform reference DSC and FDF files

cp ArmPlatformPkg/ArmPlatformPkg&#45&#59;2ndstage.dsc &#91&#59;YOUR_PLATFORM_PKG&#93&#59;/&#91&#59;YOUR_PLATFORM&#93&#59;.dsc
cp ArmPlatformPkg/ArmPlatformPkg&#45&#59;2ndstage.fdf &#91&#59;YOUR_PLATFORM_PKG&#93&#59;/&#91&#59;YOUR_PLATFORM&#93&#59;.fdf

2. Implement ArmPlatformLib by copying ArmPlatformPkg/Library/ArmPlatformLibNull/

cp &#45&#59;a ArmPlatformPkg/Library/ArmPlatformLibNull &#91&#59;YOUR_PLATFORM_PKG&#93&#59;/Library/&#91&#59;YOUR_PLATFORM&#93&#59;Lib

3. Update ArmLib/ArmCpuLib/ArmPlatformLib to use the correct library in your DSC file:

  ArmLib&#124&#59;ArmPkg/Library/ArmLib/ArmV7/ArmV7Lib.inf
  ArmCpuLib&#124&#59;ArmPkg/Drivers/ArmCpuLib/ArmCortexA9Lib/ArmCortexA9Lib.inf
  ArmPlatformLib&#124&#59;ArmPlatformPkg/Library/ArmPlatformLibNull/ArmPlatformLibNull.inf

• ArmLib can be :

  - ArmPkg/Library/ArmLib/ArmV7/ArmV7Lib.inf
  - ArmPkg/Library/ArmLib/Arm11/Arm11Lib.inf

• ArmCpuLib can be:

  - ArmPkg/Drivers/ArmCpuLib/Arm11MpCoreLib/Arm11MpCoreLib.inf
  - ArmPkg/Drivers/ArmCpuLib/ArmCortexA8Lib/ArmCortexA8Lib.inf
  - ArmPkg/Drivers/ArmCpuLib/ArmCortexA9Lib/ArmCortexA9Lib.inf
  - ArmPkg/Drivers/ArmCpuLib/ArmCortexA15Lib/ArmCortexA15Lib.inf

• ArmPlatformLib must be [YOUR_PLATFORM_PKG]/Library/[YOUR_PLATFORM]Lib/[YOUR_PLATFORM]Lib.inf

4. Define the Base and the Size of your System Memory (RAM)

  gArmTokenSpaceGuid.PcdSystemMemoryBase&#124&#59;0
  gArmTokenSpaceGuid.PcdSystemMemorySize&#124&#59;0

5. Implement and Update GicLib if required (if not ARM PL390 Generic Interrupt Controller)

6. Implement SerialPortLib, TimerLib, EfiResetSystemLib, RealTimeClockLib for your platform

Source Repository

Instruction to build ARM Versatile Express Development Board

ArmPlatformPkg-ArmVExpressPkg