how to switch from EL3 to El1 inside u-boot before linux kernel?

linux requires EL1,however uboot is in EL3 mode.linux is halted.
UEFI on ARM-V8 based Linux Embedded System

Dear ARM Forum, I want to understand more about UEFI for ARM-V8 based Embedded systems. 1. Is UEFI on ARM-V8 Linux platform is good or bad ? why ? 2. How UEFI is better than conventional Embedded...
How to get Interrupt number (IRQ number) during kernel panic in interrupt context?

I have a kernel panic in the Interrupt context. I have an use case to know the interrupt service routine number (IRQ number) during kernel panic. I had look on GIC registers from register spec, I could...
SMP Linux on a Minimal Dual-Core ARM Cortex-A15 System

Previously , I explained how to create a minimal, single-core ARM® Cortex™-A15 system running Linux®. In this article I will update the hardware design to use a dual-core ARM Cortex-A15 CPU and run SMP...
where are the C++ libraries for linux app?

I have an Altera Cyclone V SoC DevKit that came with the ARM DS-5 tools. I have been running the Hello World C linux app examples that came with the tools. I want to run a similar C++ linux app example...