linux-kernel - Re: [PATCH v2 0/4] Exynos 5410 Dual cluster support

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Message-ID: <87zjq71xcq.fsf@linaro.org>
Date:	Thu, 17 Oct 2013 13:00:37 -0700
From:	Kevin Hilman <khilman@...aro.org>
To:	Aliaksei Katovich <aliaksei.katovich@...il.com>
Cc:	Vyacheslav Tyrtov <v.tyrtov@...sung.com>,
	Mark Rutland <mark.rutland@....com>,
	devicetree@...r.kernel.org, Kukjin Kim <kgene.kim@...sung.com>,
	Russell King <linux@....linux.org.uk>,
	Ben Dooks <ben-linux@...ff.org>,
	Pawel Moll <pawel.moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Stephen Warren <swarren@...dotorg.org>,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	Rob Herring <rob.herring@...xeda.com>,
	Tarek Dakhran <t.dakhran@...sung.com>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	linux-samsung-soc@...r.kernel.org, Rob Landley <rob@...dley.net>,
	Mike Turquette <mturquette@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Naour Romain <romain.naour@...nwide.fr>,
	linux-arm-kernel@...ts.infradead.org,
	Heiko Stuebner <heiko@...ech.de>
Subject: Re: [PATCH v2 0/4] Exynos 5410 Dual cluster support

Aliaksei Katovich <aliaksei.katovich@...il.com> writes:

> hi Kevin;
>
>> Vyacheslav Tyrtov <v.tyrtov@...sung.com> writes:
>> 
>> > The series of patches represent support of Exynos 5410 SoC
>> >     
>> > The Exynos 5410 is the first Samsung SoC based on bigLITTLE architecture.
>> > Patches allow all 8 CPU cores (4 x A7 and 4 x A15) to run at the same time
>> >     
>> > Patches add new platform description, support of clock controller,
>> > dual cluster support and device tree for Exynos 5410 
>> >    
>> > Has been build on v3.12-rc5.
>> > Has been tested on Exynos 5410 reference board (exynos_defconfig).
>> 
>> Has anyone tried this on the exynos5410 based odroid-xu yet?  
>> 
>> I tried booting this on my recently arrived odroid-xu, but am not
>> getting it to boot.
>
> 	I am able to boot my odroid-xu+e to busybox with these patches applied
> 	against 3.12-rc5: exynos_defconfig and exynos5410-smdk5410.dtb were
> 	used.
>
> 	However there seem to be some issues with virq allocations, like this:

Ah, I've seen the same thing, but for me it doesn't boot reliably.
Sometimes there's an immediate fault like this[1], and once in a rare
while, it starts to boot and I see the same virq errors.

Curious what you guys are using for boot loaders.  I found some
pre-build u-boot binaries along with the necessary BL1/2 binary blobs in
the hardkernel kernel repo: https://github.com/hardkernel/linux.git
branch: origin/odroidxu-3.4.y
path: tools/hardkernel/u-boot-pre-built

Unfortunatly, that u-boot doesn't have usb networking support built in
so I couln't use u-boot to tftp the kernel, so I was able to use fasboot
to load the kernel/ramdisk, but it's very flaky.

Do you have an pointers of where to get a known working bootloader.
Ideally, a u-boot with networking/tftp support would be ideal.

Thanks,

Kevin

[1]
USB cable Connected![0x4]
Starting download of 10008576 bytes
.........
downloading of 10008576 bytes finished
Kernel size: 00296bc5
Ramdisk size: 006f3c00
Booting kernel..
## Booting kernel from Legacy Image at 40008000 ...
   Image Name:   Linux
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    2714501 Bytes = 2.6 MiB
   Load Address: 40008000
   Entry Point:  40008000
   Verifying Checksum ... OK
   XIP Kernel Image ... OK
OK 

Starting kernel ...

undefined instruction
pc : [<4000800c>]          lr : [<bfc65df4>]
sp : bfb5bbc8  ip : 00000000     fp : 00001251
r10: 00000000  r9 : 00000000     r8 : bfb5bf30
r7 : 00000000  r6 : 00000000     r5 : 40008000  r4 : bfcabac0
r3 : bfb5bfa8  r2 : 40000100     r1 : 00001251  r0 : 00000000
Flags: nZCv  IRQs off  FIQs off  Mode SVC_32
Resetting CPU ...

emmc resetting ...
resetting ...

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