Hi Pali Rohár,
Le 06/01/2015 23:19, Pali Rohár a écrit :
ooo, thanks very much for help!
On non omap HS devices that SMC instruction must not be called.
Qemu emulate omap GP device (not HS), so here is must not be
called too. I remember that linux kernel crashed when called
similar function in qemu.
Are you sure?
In the working version (before commit 41623c) SMC instruction is used
(in the do_omap3_emu_romcode_call) and it works well.
I temporary commented do_omap3_emu_romcode_call asm code and qemu
does not crash anymore.
Can somebody look into uboot code how to disable calling any code
which is using smc instructions on non HS devices?
It looks like do_omap3_emu_romcode_call() is called for nokia
n900 only from board code. So check for HS device can be added
here...
Commenting do_omap3_emu_romcode_call() in board/nokia/rx51/rx51.c
also fixed problem in qemu.
On Tuesday 06 January 2015 23:03:23 Georges Savoundararadj wrote:
Hi Pali Rohár,
The "prefetch abort exception" occurs in the function
do_omap3_emu_romcode_call (in
arch/arm/cpu/armv7/omap3/lowlevel_init.S) when executing the
instruction "SMC #1".
I can't figure out what makes the difference between the
working and the not-working versions.
Maybe we should monitor the Secure Configuration Register but
gdb does not allow to watch the coprocessor registers.
I hope it helps.
Regards,
Georges
Le 04/01/2015 23:28, Georges Savoundararadj a écrit :
Hi Pali Rohár,
Le 04/01/2015 23:14, Pali Rohár a écrit :
Hello,
here are commands how to compile u-boot for nokia n900,
convert uboot image into n900 nand MTD file and run it
under linaro arm version of qemu (upstream version of qemu
have not merged n900 support yet):
$ export ARCH=arm
$ export CROSS_COMPILE=arm-linux-gnueabi-
$ make nokia_rx51_config
$ make
$ qflasher -x xloader-qemu.bin -s secondary-qemu.bin \
-k u-boot.bin -m rx51 -o u-boot.mtd
$ qemu-system-arm -M n900 -mtdblock u-boot.mtd -serial
/dev/tty
You need:
* qflasher - Nokia generator of nand MTD image with CAL
data * xloader-qemu.bin - Nokia first stage bootloader
(X-Loader) * secondary-qemu.bin - Nokia second stage
bootloader (NOLO) * qemu-system-arm - Linaro arm version
of qemu
Linaro arm version of qemu can be downloaded e.g. from
ubuntu:
http://packages.ubuntu.com/source/precise/qemu-linaro (I'm
using this version)
Nokia qflasher and bootloaders are proprietary and closed
source but could be found on internet. License allows to
redistribute binaries for non commercial purposes. If you
are unable to find it on internet anymore (originally they
were hosted on website repo.meego.com before intel turned
it off) and you are OK with that license, I can send you
needed files.
====
Copyright (c) Nokia Corporation 2010
All Rights Reserved.
This material, including documentation and any related
computer programs, is protected by copyright controlled by
Nokia Corporation. All rights are reserved. Modifying,
adapting and/or translating, any or all of this material
requires the prior written consent of Nokia. Distribution
for commercial purposes not allowed without prior written
approval from Nokia. ====
I am OK with that. Please send me the needed files.
Thanks,
Best regards,
Georges
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