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Message
From: "Damon Brantley" <brantley@m...>
Date: Fri, 25 Jul 2003 07:27:07 -0500
Subject: Re: [openrisc] uclinux ram model in or1k sim.
I will try the build scripts from ATS this evening to see if there is any
difference, but I notice
the build is done using CONFIG_ROMKERNEL. For my hardware, I will be
loading memory directly so I do not
want to load from flash.
Maybe I am misunderstanding what CONFIG_ROMKERNEL means. Looking at the
code(head.S __flsh_start), it looks like
CONFIG_ROMKERNEL will cause the kernel to be loaded into RAM from flash.
In my case I am using CONFIG_RAMKERNEL which bypasses flsh_start for the
most part and goes to start_kernel.
Also ram.ld gets used in the CONFIG_RAMKERNEL case.
The build did have problems for me with CONFIG_RAMKERNEL. I did have to
modify a file because of a link error.
It was ramvec or ramvec_start. I can not remember which file.
I am just trying to get some ideas for the weekend, since this list pretty
much goes dormant on the weekend.
I guess everyone else has a life.:-)
Regards,
Damon
At 07:57 AM 7/25/2003 +0200, you wrote:
>On Friday 25 July 2003 05:36, Damon Brantley wrote:
>> I am attempting to simulate uclinux in or1k sim. I will be loading the
>> image directly into ram,
>> so I am using the ram model. The problem I am running into is the kernal
>> hangs at serial.c line 411.
>>
>> I did make some changes to the ram.ld to accomodate the size of the binary,
>> but nothing that should be
>> interfereing with the UART memory locations. The memory is readable and
>> shows data present. I also
>> made a few changes to the sim.cfg because of the kernel not appearing in
>> memory at all.
>>
>> I was able to successfully run the rom model in the simulator.I did notice
>> in the rom model though, the simulator
>> would print warnings about nonwritable memory locations when accessing ROM
>> memory. I do not see this
>> in the ram model. Also in the rom model, unaccessed UART memory locations
>> showed unknowns (xx) instead of values.
>> I saw hex values for all locations in the ram model
>>
>> Has anyone else run the uclinux in the ram model in the or1k with success?
>Very likely you have done something wrong.
>
>See ATS page under or1k projects on opencores.org, where tools and uclinux
>builds daily. There are also scripts how to build everything.
>
>Marko
>
>
>
>
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