CVS commit: src/sys/dev/isa

["Jaromir Dolecek" <jdolecek%netbsd.org@localhost>]

Module Name:    src
Committed By:   jdolecek
Date:           Tue May 29 06:14:34 UTC 2018

Modified Files:
        src/sys/dev/isa: isadma.c isadmareg.h isareg.h

Log Message:
fix off-by-one in the mapping of the ISA DMA page registers, they actually
start at 0x81; the code used bus_space_map() starting from 0x80 but
used +1 offset for actual I/O, now it maps starting 0x81 and does I/O
without offset

the reads and writes work exactly the same as before, but this frees
0x80 for being mapped independantly

patch provided in PR kern/52468 by Jonathan Chapman; checked against the spec
and also FreeBSD sys/x86/isa/isa_dma.c


To generate a diff of this commit:
cvs rdiff -u -r1.66 -r1.67 src/sys/dev/isa/isadma.c
cvs rdiff -u -r1.8 -r1.9 src/sys/dev/isa/isadmareg.h
cvs rdiff -u -r1.9 -r1.10 src/sys/dev/isa/isareg.h

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