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Re: PID ROM and eCos
- To: Gary Thomas <gthomas at cambridge dot redhat dot com>
- Subject: Re: [ECOS] PID ROM and eCos
- From: Jonathan Larmour <jlarmour at redhat dot com>
- Date: Wed, 24 Jan 2001 19:08:16 +0000
- Cc: Grant Edwards <grante at visi dot com>, ecos-discuss at sources dot redhat dot com,Dave Airlie <airlied at parthus dot com>
- Organization: Red Hat UK Ltd.
- References: <XFMail.20010124090159.gthomas@cambridge.redhat.com>
Gary Thomas wrote:
>
> Look at the startup code for the Cirrus Logic EDB7xxx boards. They
> support this configuration where the image in ROM (FLASH or whatever)
> is linked at an address different from where they are stored. If
> this case is detected, the ROM code simply gets copied to RAM at
> startup time. Look in the file:
> hal/arm/edb7xxx/current/include/hal_platform_setup.h
Why was it done this way, and not with a more explicit ROMRAM startup type?
If you have a separate startup type it is more under user control.
Anyway, you can also refer to the way the mips vrc4373 or sh edk7708 do it,
which use an explicit ROMRAM startup.
Jifl
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