1Overview of SPL verified boot on powerpc/mpc85xx & arm/layerscape platforms 2=========================================================================== 3 4Introduction 5------------ 6 7This document provides an overview of how SPL verified boot works on powerpc/ 8mpc85xx & arm/layerscape platforms. 9 10Methodology 11----------- 12 13The SPL image is responsible for loading the next stage boot loader, which is 14the main u-boot image. For secure boot process on these platforms ROM verifies 15SPL image, so to continue chain of trust SPL image verifies U-boot image using 16spl_validate_uboot(). This function uses QorIQ Trust Architecture header 17(appended to U-boot image) to validate the U-boot binary just before passing 18control to it. 19