From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jonathan Larmour To: Arnaud Mouiche Cc: ecos-discuss@sourceware.cygnus.com Subject: Re: [ECOS] FIQ on ARM processor Date: Thu, 16 Aug 2001 07:51:00 -0000 Message-id: <3B7BDE04.2593077E@redhat.com> References: <5.0.2.1.0.20010816163127.00b1db70@193.54.84.101> X-SW-Source: 2001-08/msg00556.html Arnaud Mouiche wrote: > > Hi. > > when reading vector.s, it looks like ecos deal with FIQ like it deals with > IRQ. Does it means there is no advantage to use FIQ than IRQ. Yes there is. FIQs are defined for very fast interrupts. If you choose to use the "standard" eCos interrupt handling mechanism then this somewhat defeats this, so there is no point eCos trying to handle FIQ differently. But you can still attach your own VSR (written in assembler) to FIQ. Jifl -- Red Hat, Rustat House, Clifton Road, Cambridge, UK. Tel: +44 (1223) 271062 Maybe this world is another planet's Hell -Aldous Huxley || Opinions==mine