From: Tim Sander <tim@krieglstein.org>
Date: Wed, 26 Mar 2014 15:25:33 +0100
Subject: [U-Boot] CONFIG_ARMV7_NONSEC on altera soc (alignment issues ?)
Message-ID: <5564506.u1KPOY9OcW@dabox>
List-Id: <u-boot.lists.denx.de>
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
To: u-boot@lists.denx.de

Hi

I am currently trying to configure either Altera Soc and Xilinx Zynq to boot Linux in nonsecure-mode.
This mail focusses on the Altera SOC.

As soon as the u-boot switched to normal mode it seems there is a problem with code alignment handling? 
At least it seems the code which is running beforehand stops working in normal mode and stops in either
data_abort or prefetch handler. It stopps working when it hits the call to
stdio_devices[file]->puts(s); in console_puts (console.c:255).

print *stdio_devices[file]
$2 = {flags = 16978471, ext = 16978464, 
name = "$\022\003\001\202\022\003\001\360\031\003\001\020\060\220", <incomplete sequence \345>, 
  start = 0xe92d4070, stop = 0xe2806010, putc = 0xe1530006, puts = 0xe1a04000, tstc = 0xe1a05001, 
  getc = 0xe5810024, priv = 0x1a000007, list = { next = 0xe5831004, prev = 0xe5813000}}

As there are unaligned addresses (putc?) in these function calls i have the impression that this is not working in
normal mode but in secure mode.

Unfortunatly i was not able to get the mainline u-boot to boot on the altera soc so i patched the altera release:
git://git.rocketboards.org/u-boot-socfpga.git
with the 1740999a39ea4217bf926002d10869c0d925a5dc aka socfpga_v2013.01.01-rel branch.

As the altera u-boot release socfpga_v2013.01.01-rel is to old to have the CONFIG_ARMV7_NONSEC patches
i cherry-picked the following patches:
d4296887544ddf95808bfb62f312008f519efb7b	extend non-secure switch to also go into HYP mode
ba6a1698116da272f14c53a3ae41467cb7fc4372 	add SMP support for non-secure switch
bb975455650b1f36681de31a93ffe54952ed3a6b 	trigger non-secure state switch during bootm execution
1ef923851ab8ffcc4265fd991815b88d9c1f12d7 	add C function to switch to non-secure state
16212b594f385bd594d5d316bf11b13c1186e3d7 	add assembly routine to switch to non-secure state
45b940d6f9a9d4989452ea67480e299bfa51ee19 	add secure monitor handler to switch to non-secure state
d75ba503a972df09784f1a332ba356ef8b42a0a6 	ARM: prepare armv7.h to be included from assembly source

I also applied the attached hacked together patches to get the system running and fix up the stack pointer in 
normal mode as it pointed to 0. 

Best regards
Tim