CVS commit: src/sys/arch/mac68k

["Rin Okuyama" <rin%netbsd.org@localhost>]

Module Name:    src
Committed By:   rin
Date:           Tue Jul 23 15:19:07 UTC 2019

Modified Files:
        src/sys/arch/mac68k/include: psc.h
        src/sys/arch/mac68k/mac68k: psc.c
        src/sys/arch/mac68k/obio: esp.c espvar.h

Log Message:
PR port-mac68k/24883

Support DMA xfer for SCSI adapter of AV Mac (660/840AV), written by
Michael Zucca.

This improves disk I/O performance by nearly one order of magnitude.
In addition, interrupt storm due to heavy disk PIO is resolved.

I'm deeply grateful to Michael Zucca for his analysis of DMA engine
and submission of PR. I also thank Izumi Tsutsui (useful comments on
port-mac68k@) and Martin Husemann (test on 660AV).


To generate a diff of this commit:
cvs rdiff -u -r1.7 -r1.8 src/sys/arch/mac68k/include/psc.h
cvs rdiff -u -r1.10 -r1.11 src/sys/arch/mac68k/mac68k/psc.c
cvs rdiff -u -r1.57 -r1.58 src/sys/arch/mac68k/obio/esp.c
cvs rdiff -u -r1.8 -r1.9 src/sys/arch/mac68k/obio/espvar.h

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.