This is the mail archive of the
ecos-discuss@sources.redhat.com
mailing list for the eCos project.
Re: about interrupts nesting and vector number decoding
- To: "yyl" <ylyuan at davform dot com>
- Subject: Re: [ECOS] about interrupts nesting and vector number decoding
- From: Jesper Skov <jskov at redhat dot com>
- Date: 25 Oct 2000 08:52:08 +0200
- Cc: "eCos_discuss" <ecos-discuss at sourceware dot cygnus dot com>
- References: <002901c03e34$9e79d560$8664a8c0@yyl_nt>
>>>>> "yyl" == yyl <ylyuan@davform.com> writes:
yyl> Q2:i think the macro of hal_intc_decode
yyl> in the file variant.inc only = decodes the vector from SIU
yyl> level,i don't find the code decoding the vector using the
yyl> rigester CIVR of CPM? Thanks!
Correct, only 1st level decoding is done in the assembly code. Further
decoding is done by an arbiter. See the var_intr.c file.
There's been some discussion on the CPM interrupt handling the last
couple of weeks on the list - you may want to go back and read all
those.
Jesper