A20-OLinuXino-MICRO-4GB

[Martin Stein]

Hi Nick,

I don't think that the instruction set will differ that much.
Differences in the ARMv7 revisions more often refer to details of the
hardware virtualisation. The different Cortex-A revisions in turn more
likely mean that you can't e.g. reuse the Cortex-A9 timer
base-hw/src/core/timer/cortex_a9.h. However, in regards to the interrupt
controller merely the MMIO base depends on Cortex A9. So maybe you can
reuse at least the ARM-GIC backend base-hw/src/core/pic/arm_gic.h.

Greetings,
Martin

On 17.12.2013 15:36, buzz heavyyear wrote:
> Hi Martin
>
> It's a Cortex-A7 - I'm hoping that the assembler is 100% compatible.
> If not, I'll dig down into the linux that the AOlinuXino refers to.
>
> Thanks for taking time to outline the structure I need to set up.
>
> Very best, and if I don't manage to post before the 25th, have a great
> xmas %*}
> Nick
>
> ------------------------------------------------------------------------
> Date: Tue, 17 Dec 2013 15:06:27 +0100
> From: martin.stein at ...1...
> To: genode-main at lists.sourceforge.net
> Subject: Re: A20-OLinuXino-MICRO-4GB
>
> Hi Nick,
>
> Nice to hear that you're intending to port base-hw to A20-OLinuXino
> :-) Currently there are 3 Cortex-A9 boards officially supported by
> base-hw: VEA9X4, PBXA9, and the Pandaboard. You can refer to any of
> these boards. Looking e.g. at PBXA9, you can see that basically the
> following files must be implemented for your board:
>
> base/mk/spec-platform_<BOARD>.mk
> base/include/platform/<BOARD>/drivers/board_base.h
>
> base-hw/mk/spec-hw_<BOARD>.mk
> base-hw/src/core/<BOARD>/tlb.h
> base-hw/src/core/<BOARD>/target.mk
> base-hw/src/core/<BOARD>/timer.h
> base-hw/src/core/<BOARD>/pic.h
> base-hw/src/core/<BOARD>/platform_support.cc
> base-hw/src/core/<BOARD>/cpu.h
>
> To add support for your board in the builddir tool you should add
>
> hw_<BOARD>::
>     @echo "SPECS = genode hw_<BOARD>" > $(BUILD_DIR)/etc/specs.conf
>
> to tool/create_builddir and copy tool/builddir/etc/build.conf.hw_pbxa9
> to tool/builddir/etc/build.conf.hw_<BOARD>.
>
> Cortex-A9 brings its own core timer and interrupt controller, so the
> only thing left is a UART driver. Either one of the drivers in
> base/include/drivers/uart/ fit or you should implement your own at
> this place. To install the driver afterwards you should create
> base-hw/include/<UARTNAME>/drivers/serial_log.h (for instance PBXA9
> uses base-hw/include/pl011/drivers/serial_log.h) and add UARTNAME to
> SPECS in your base/mk/spec-platform_<BOARD>.mk. After that
> Genode::printf should print to the UART.
>
> Assuming that the Cortex-A9 / ARMv7 revision of your board and the
> board you used as reference do not differ, you should be able to run a
> first scenario after this. If you have further questions do not
> hesitate to ask  ;-)
>
> Greetings,
> Martin
>
> On 17.12.2013 14:19, buzz heavyyear wrote:
>
>     Hi
>
>     I have just received a new board with a dual core cortex a7, the
>     A20-OLinuXino, which I'd like to set up and add to the genode tree
>     - currently more pressing than the RPi!
>
>     I'm no Arm expert, but I'm assuming that I can take most of the
>     existing arm_v7 and a9 code in base-hw and just use this for
>     setting up an a20olinuxino environment and building an image?
>
>     https://www.olimex.com/Products/OLinuXino/A20/A20-OLinuXino-MICRO-4GB/open-source-hardware
>
>     Cheers
>     Nick
>
>
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