Hello Martin

On further examination, I've noticed you've added the commands to generate uImage in build_uboot_image in tool/run (but it doesn't generate the uImage in var/run/<script>).

Secondly, On what basis have you filled the enumerations in board_base.h ? Because there are different values for pbxa9, vea9x4 and pandaboard. I understand that every SoC might have a different driver implementation, but how did you get around to building one, say for pbxa9? Can you share some insight into the process: the use of mmio regions, IRQ handlers etc.?

Thanks in advance
Aditya


On Tue, Dec 17, 2013 at 7:36 PM, Martin Stein <martin.stein@...1...> wrote:
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?


Cheers
Nick


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