ARM DS-5 Using the Debug Hardware Configuration Utilities

Creating debug hardware target configurations5.22 Configuring TrustZone enabled processor behavior when debug privileges arereducedThe target does not allow invasive debug, that is when the processor enters debug state, whilethe execution environment is in the Secure World. Any attempt to do so might result in thefollowing errors:• Insufficient debug privilege to restore processor state for restart.• Insufficient debug privilege to write software breakpoint to memory.To suppress these errors, set the Ignore debug privilege errors when starting core(IGNORE_START_DEBUG_PRIV_FAIL) configuration item.This option is useful if you are trying to debug an application in Normal World, while the currentconnection state of the target is in Secure World.In this setup, the debug information and breakpoints are applied to the Normal World. However,the initial connection still happens while the target is in Secure World. The debug hardware unithas no control in this state, so debug control must be delayed until the target enters NormalWorld. Until that time, any errors arising from debug operations must be silently ignored.5.22.1 See alsoTasks• Configuring SecurCore behavior if the processor clock stops when stepping instructionson page 5-38.Reference• Debug hardware Advanced configuration reset options on page 5-37.ARM DUI 0498F Copyright © 2010-2012 ARM. All rights reserved. 5-39ID021112Non-Confidential