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