| Overview of SPL verified boot on powerpc/mpc85xx & arm/layerscape platforms |
| =========================================================================== |
| |
| Introduction |
| ------------ |
| |
| This document provides an overview of how SPL verified boot works on powerpc/ |
| mpc85xx & arm/layerscape platforms. |
| |
| Methodology |
| ----------- |
| |
| The SPL image is responsible for loading the next stage boot loader, which is |
| the main u-boot image. For secure boot process on these platforms ROM verifies |
| SPL image, so to continue chain of trust SPL image verifies U-boot image using |
| spl_validate_uboot(). This function uses QorIQ Trust Architecture header |
| (appended to U-boot image) to validate the U-boot binary just before passing |
| control to it. |
