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Re: [Qemu-devel] [PATCH] Add e500 instructions dcblc, dcbtls and dcbtstl
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From: |
Fabien Chouteau |
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Subject: |
Re: [Qemu-devel] [PATCH] Add e500 instructions dcblc, dcbtls and dcbtstl as no-op |
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Date: |
Fri, 01 Jul 2011 18:21:38 +0200 |
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User-agent: |
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.17) Gecko/20110516 Lightning/1.0b2 Mnenhy/0.8.3 Thunderbird/3.1.10 |
On 01/07/2011 18:00, Scott Wood wrote:
> On Fri, 1 Jul 2011 17:39:49 +0200
> Fabien Chouteau <address@hidden> wrote:
>
>> No, I just implemented these no-oped instructions to get rid of an illegal
>> instruction exception while running u-boot on my emulated p2010.
>>
>
> Heh, so someone *is* trying to run firmware. :-)
>
> It would take a lot of low-level hardware simulation to get unmodified
> U-Boot to run -- probably not worth it unless your goal is an environment
> for debugging U-Boot.
>
> It uses cache locking to create working space before the memory controller
> is initialized, so it's really expecting those instructions to work.
It was mainly to test the correctness of emulation, but it appears that I have
to implement more devices (eSPI, I2C, LBC...) than I initially thought.
--
Fabien Chouteau