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RE: Question about Stack usage in eCOS ? Thanks
- From: "Qiang Huang" <jameshq at liverpool dot ac dot uk>
- To: "sandeep" <sandeep at codito dot com>
- Cc: "Ecos-Discuss" <ecos-discuss at sources dot redhat dot com>
- Date: Mon, 23 Sep 2002 15:58:20 +0100
- Subject: RE: [ECOS] Question about Stack usage in eCOS ? Thanks
Thanks a lot.
From the post I learnt a lot but still have a slight problem in
understanding stack usage.
As said in the
http://sources.redhat.com/ml/ecos-discuss/2002-09/msg00224.html post,
switch to interrupt stack(4)
|
[enable interrupts](3)
|
call any DSRs ??
|
[restore interrupt state]
|
switch back to thread stack(5)
|
|----------N-new thread?
| Y
| |
| switch context
| {enable interrupts}
| |
| return from switch
| {restore interrupt state}
| |
|----------------|
|
zero scheduler lock
Does the DSR mentioned in the diagram include the Cyg_RealTimeClock::dsr()
which rtc->tick() will be called inside. runs on the interrupt stack? if so
when will the stack switch back to the thread stack? how and where does this
switching from interrupt stack to user thread stack implemented?
Thanks a lot
-----Original Message-----
From: sandeep@dns.codito.co.in [mailto:sandeep@dns.codito.co.in]On
Behalf Of sandeep
Sent: Monday, September 23, 2002 3:03 PM
To: Qiang Huang
Subject: Re: [ECOS] Question about Stack usage in eCOS ? Thanks
Hi Qiang,
may be you look at the mail on the list that was posted few days back. I
hope
it will answer lot of your questions.
Subject: [ECOS] Re: On ecos interrupt process
Date: 20 Sep 2002 14:45:08 +0100
From: Nick Garnett <nickg@ecoscentric.com>
To: ÕÅ ÁÁ <johnsonest@hotmail.com>
CC: ecos-discuss@sources.redhat.com
regards
sandeep
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