This is the mail archive of the
ecos-discuss@sources.redhat.com
mailing list for the eCos project.
Re: Req for Comments: Power management and Memory Protection
- To: "ecos-discuss at sources dot redhat dot com" <ecos-discuss at sources dot redhat dot com>
- Subject: Re: [ECOS] Req for Comments: Power management and Memory Protection
- From: Andrea Acquaviva <aacquaviva at deis dot unibo dot it>
- Date: Tue, 06 Mar 2001 15:43:06 +0100
- CC: Dominic Ostrowski <dominic dot ostrowski at 3glab dot com>
- Organization: DEIS
- References: <3AA3AAAC.89D5E8C9@3glab.com>
Dominic Ostrowski wrote:
> Hi,
>
> We're currently engaged in adding support to eCos for power managment
> and memory protection on ARM platforms (currently Assabet & Ipaq).
>
> As these topics may be of interest to many eCos developers - we would
> particulalrly welcome your feedback on these two docs:
>
> An overview of Power Management under eCos (pdf)
> An overview of Memory Protection under eCos
>
> (from http://www.3glab.org/developer/ecos/)
>
> Reply either via this list or directly to richard.panton@3glab.com (for
> memory protection) or bill.munday@3glab.com (for power management).
>
> Dominic
>
> (See www.3glab.org for the latest open source developments and
> www.3glab.com for company info)
Hi,
I am very interested in power management strategies under strongarm-eCos,
so I read the document and pricipally I have two comments:
1. I modified ecos kernel by putting the proc in idle mode when it reaches
the idle thread,
and I found that it's not necessary to reenable clock switching after
exiting the idle mode.
However, what's the exact sequence of operation you make before and
after entering the idle mode?
2. I wrote some multimedia standalone applications for my strongarm-based
board. Now I'm in the process
of porting under eCos these programs. I used speed-setting policies
in order to save power, so I'm interested
on the possibility of using these strategies under eCos. Have you
thought about this? Are you interested on
this matter?
Andrea.
--
Ing. Andrea Acquaviva
D.E.I.S. - Universita' di Bologna
V.le Risorgimento, 2 40136 BOLOGNA (ITALY)
Tel: (+39) 051 20 93787 Fax: (+39) 051 2093786