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Date: Thu, 19 Jan 2012 13:25:55 -0600
From: Mark Langsdorf <mark.langsdorf@calxeda.com>
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Subject: Re: [Qemu-devel] [PATCH v11 5/6] arm: SoC model for Calxeda Highbank
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To: Peter Maydell <peter.maydell@linaro.org>
Cc: "i.mitsyanko@gmail.com" <i.mitsyanko@gmail.com>, "edgar.iglesias@gmail.com" <edgar.iglesias@gmail.com>, "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>, Rob Herring <rob.herring@calxeda.com>, "afaerber@suse.de" <afaerber@suse.de>

On 01/19/2012 01:15 PM, Peter Maydell wrote:
> On 19 January 2012 15:43, Mark Langsdorf <mark.langsdorf@calxeda.com> wrote:
>> +    highbank_binfo.board_id = -1; /* provided by deviceTree */
> 
> This doesn't work, because arm_boot.c does:
>         bootloader[1] |= info->board_id & 0xff;
>         bootloader[2] |= (info->board_id >> 8) & 0xff;
> 
> and so when you try to boot the kernel it does this:
> 
> ===begin===
> cam-vm-266:maverick:qemu-jeos$
> ~/linaro/qemu-from-laptop/qemu/arm-softmmu/qemu-system-arm -kernel
> build-arm/linux/arch/arm/boot/zImage -initrd build-arm/initramfs.img
> -M highbank -serial stdio
> 
> Error: unrecognized/unsupported machine ID (r1 = 0x0000ffff).
> 
> Available machine support:
> 
> ID (hex)        NAME
> ffffffff        Highbank
> 
> Please check your kernel config and/or bootloader.
> ===endit===

Works for me, but it requires a kernel build with the device tree
dtb appended to it.

===begin===
mlangsdorf@mjl-dell:~/work/qemu$
./mainline_qemu/arm-softmmu/qemu-system-arm -nographic -M highbank
-kernel linux-2.6/kernel_with_dtb.img -drive
id=disk,if=ide,file=sataDisk -device ide-drive,drive=disk,bus=ide.0
-append "root=/dev/sda2 console=ttyAMA0,38400 debug earlyprintk" -m 4089
-smp 3
[    0.000000] Booting Linux on physical CPU 0
[    0.000000] Initializing cgroup subsys cpuset
[    0.000000] Initializing cgroup subsys cpu
[    0.000000] Linux version 3.2.0+ (mlangsdorf@mjl-dell) (gcc version
4.6.1 (Ubuntu/Linaro 4.6.1-9ubuntu3) ) #72 SMP Wed Jan 18 15:10:31 CST 2012
[    0.000000] CPU: ARMv7 Processor [410fc090] revision 0 (ARMv7),
cr=10c5387d
[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing
instruction cache
[    0.000000] Machine: Highbank, model: Calxeda Highbank
[    0.000000] Memory policy: ECC disabled, Data cache writealloc
[    0.000000] On node 0 totalpages: 1046784
===endit===

--Mark Langsdorf
Calxeda, Inc.