Re: Installable ARMv8 cross-toolchain
On Sat, Nov 03, 2012, Marek Vasut wrote:
> I need to catch up with you in there ;-) What do you use for a bootloader on
> these armv8 devices?
No bootloader at the moment, but a boot wrapper! ;-)
At the moment, ARMv8 work is mostly on virtual platforms (I guess there
might be some people with expensive FGPAs too); the two virtual
platforms Linaro is using are:
* the free (as in beer) ARMv8 Foundation model ("Foundation")
* the pre-built ARMv8 Versatile Express model ("VE RTSM")
ARM recently published some information on the various models at:
http://www.arm.com/fvp
The two virtual platforms are relatively similar; the main differences
are:
* VE model has a MMC while the Foundation model has an AMBA virtio block
device
* VE has a RTC while Foundation model hasn't
* VE has an AMBA LCD (clcd) while Foundation model hasn't
At least the first difference prevents us from sharing a single Device
Tree with all devices between the two platforms (kernel oops when
starting the Foundation model with the MMC listed or vice-versa).
To boot the platform, a small boot wrapper is combined with the kernel,
device tree, and kernel cmdline into an ELF .axf file for the model to
run.
This page explains how to rebuild kernel + device tree + boot wrapper:
https://wiki.linaro.org/HowTo/BuildArm64Kernel
(the boot wrapper is maintained by Catalin Marinas on git.kernel.org)
The plan is to switch to a full bootloader -- likely Tianocore (UEFI) --
when available as it's painful to have to rebuild the .axf whenever the
kernel or kernel cmdline change, and real hardware wouldn't use a boot
wrapper anyway.
I guess you're asking because you consider an U-Boot port? :-)
Cheers,
--
Loïc Minier
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Re: Support for Raspberry Pi
Hi Geert, On Fri, Nov 02, 2012, Geert Schuring wrote: > Could you tell me if you have any plans to enable Ubuntu on the Raspberry Pi > (ARMv6) ? Short answer: an Ubuntu ARMv6 port for the Raspberry Pi isn't a Linaro target, but we're taking patches and we're interested in some bugs! :-) There are two main reasons for that: - Linaro doesn't have the capacity to do large scale distro ports, this is usually mainly the job of distros, and we're sometimes giving a hand - Linaro is all about the future of ARM, so the focus is mainly on ARMv7 and ARMv8 at this point That said, there is hope! First, a bunch of Linaro folks have a Raspberry Pi and play with it; second, I believe Ubuntu's armel port is being re-targeted to ARMv5, so Ubuntu armel binaries should eventually run on the Pi. Linaro does directly care about toolchain regressions you might encounter on ARMv5/ARMv6 (or even on x86), so please do report us any toolchain regressions caused by Linaro patches. Cheers, -- Loïc Minier ___ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
Re: [U-Boot] [PATCH v2 0/3] EXYNOS: Add support for Exynos4x12
Dear Chander Kashyap, > ping CCing custodian. > On 2 October 2012 15:16, Chander Kashyap wrote: > > This patch series popultes Register addresses, clock structure and > > gpio structure for Exynos4x12. > > > > Changes in v2: > > - Fixed the GPIO base address macro for > > exynos4x12_gpio_part3_get_nr > > > > in arch/arm/include/asm/arch-exynos/gpio.h > > > > Chander Kashyap (3): > > EXYNOS: EXYNOS4X12: Populate Exynos4x12 register addresses > > EXYNOS: EXYNOS4X12: Add clock structure for EXYNOS4X12 > > EXYNOS: EXYNOS4X12: Add gpio structure for EXYNOS4X12 > > > > arch/arm/include/asm/arch-exynos/clock.h | 276 > > ++ arch/arm/include/asm/arch-exynos/cpu.h > > | 48 +- > > arch/arm/include/asm/arch-exynos/gpio.h | 85 + > > 3 files changed, 402 insertions(+), 7 deletions(-) > > > > -- > > 1.7.9.5 Best regards, Marek Vasut ___ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
Re: Installable ARMv8 cross-toolchain
Dear Wookey, > After a fair amount of dicking about I have managed to build a > cross-toolchain for arm64/aarch64 which installs on Ubuntu Quantal. It > even builds packages, although it has at least one notable limitation, > and I have no idea if it produces working code yet :-) > > The main limitation is that the default library search paths have come > out as the old dpkg-cross ones, not the new multiarch ones. If someone > can tell me where to fix that it would be very helpful and I'll try > and put an updated one in the repo. > > In the meantime you can work round it effectively using > /etc/dpkg/buildflags. (see wiki page below for details) > > The cross-toolchain only supports C, C++ and fortran with no extras > like libssp, libmudflap etc, because there is no architecture support > for them yet. > > I started a port page to keep track of things here: > http://wiki.debian.org/Arm64Port > > And if you want to set up a quantal chroot and see if you can build > things, details are here: > https://wiki.linaro.org/Platform/DevPlatform/CrossCompile/arm64bootstrap > > The bottom line is that you can debootstrap (or sbuild-createchroot) a > quantal chroot, add the bootstrap repo and do 'apt-get install > crossbuild-essential-arm64' and get a working cross-build environment. > > The repo is here: > http://people.debian.org/~wookey/bootstrap.html > > That should be useable for both dpkg-cross style bulding or > multiarch-style bulding. > > The repo also contains updated dpkg-cross, multiarch python, multiarch > perl, updated dpkg with buildprofile/staging support, sbuild (although > in fact I think stock sbuild should work OK), and dose-builddebcheck > which can tell you what things are currently cross-buildable from > available binaries and sources. Most of that is pretty new and not > very well tested but 'it works for me'. > > More arm64 packages will be along soon (dose3 currently indicates 40 > more buildabale packages), but there is plenty still to fix for a full > debootstrap-able arm64 package set. > > Anyone keen to help with bootstrapping the port is very welcome. There > will be a session about it at UDS next week, and a more general one on > distro bootrapping at the Armv8 minisummit a the co-located linaro > connect. And I'll be giving a talk about this stuff at Linxconf-Europe > in Barcelona the week after. > > I think that's all for now. Enjoy, and tell me what breaks :-) I need to catch up with you in there ;-) What do you use for a bootloader on these armv8 devices? > Wookey Best regards, Marek Vasut ___ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
