From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andrew Lunn <andrew.lunn@ascom.ch>
To: Arnaud Mouiche <arnaud.mouiche@inventel.fr>
Cc: ecos-discuss@sourceware.cygnus.com
Subject: Re: [ECOS] FIQ on ARM processor
Date: Thu, 16 Aug 2001 07:54:00 -0000
Message-id: <20010816165443.J5107@biferten.ma.tech.ascom.ch>
References: <5.0.2.1.0.20010816163127.00b1db70@193.54.84.101>
X-SW-Source: 2001-08/msg00557.html

> If not, is there an other way to do ?

We have only one source generating FIQ interrupts. So we sidestep ecos
all together and install a VSR on the FIQ. That puts our code directly
onto the FIQ vector. You have to take the usual precausions, save
registers etc before jumping into C code. Also you cannot call any
eCos functions since your not in an eCos ISR. Only a few of our FIQ
interrupts require eCos to do something. When that happens we use a
software controlled interrupt to trigger an IRQ interrupt which eCos
then handles.

        Andrew