port-mips: Re: PR port-mips/4400: news3400 hangs up in Flush[DI]Cache

Subject: Re: PR port-mips/4400: news3400 hangs up in Flush[DI]Cache
To: None <port-mips@netbsd.org>
From: Toru Nishimura <nisimura@itc.aist-nara.ac.jp>
List: port-mips
Date: 01/28/1999 16:42:23

Speaking specifically to DECstations, ULTRIX cache flushing routines,
r3_kn01_clean_icache() and r3_kn01_clean_dcache(), do not attempt
writebuffer drained.  Both seem to do just text book case of I/D
flush, without 'bc0f 1b' instruction.  Old Mach3/pmax 'mips_cache.s'
seems consistent with what ULTRIX does.  I wonder it might be just ok
for DECstations to remove '#ifdef pmax' clauses.

Tohru Nishimura
Information Technology Centre
Nara Institute of Science and Technology