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Re: ECOS/Redboot -- Several Questions
- From: Gary Thomas <gary at mlbassoc dot com>
- To: dorin at gr-303 dot com
- Cc: eCos Discussion <ecos-discuss at ecos dot sourceware dot org>
- Date: Thu, 28 Apr 2005 13:10:49 -0600
- Subject: Re: [ECOS] ECOS/Redboot -- Several Questions
- References: <20050428190641.40773.qmail@web42006.mail.yahoo.com>
On Thu, 2005-04-28 at 12:06 -0700, Michael Dorin wrote:
> Hello,
>
> I have an 860T based board and am trying to convert
> the MBX templete. However a couple differences:
>
> * My board has CS0 tied to address 0. I believe the
> wants to boot from 0xfe000000. I don't have ram
> at 0. I have changed the ram.ldi and rom.ldi files
> in the pkgconf directory. I have changed the
> lib/target.ld files.
>
> I can't seem to get a good link though.
>
> Where might I be missing something?
>
> Second question...
> Is it bad that 0 is my flash address?
Yup - poor choice. You have total control over this during the
machine initialization, so it's much better to map the FLASH (CS0)
up high, e.g. 0xFE000000, and put the RAM (typically CS1) at 0x0.
Also, use the viper as a better template for 860T starting point.
--
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Gary Thomas | Consulting for the
MLB Associates | Embedded world
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