(1) the 'physmem' constant has a value which i don't think is
correct
(2) not sure what happens if you mmap a region of kmem which is
not in the kernel's address space...
* patch from vak@zebub.msk.su (Serge V.Vakulenko) to work around
* a hardware bug in cheap WD clone boards where the PROM checksum
* byte is always zero
*
* Revision 2.4 93/09/29 21:24:30 davidg
* Added software NIC reset in NE probe to work around a problem
* with some NE boards where the 8390 doesn't reset properly on
* power-up. Remove initialization of IMR/ISR in the NE probe
* because this is inherent in the reset.
*
* Revision 2.3 93/09/29 15:10:16 davidg
* credit Charles Hannum
*
* Revision 2.2 93/09/29 13:23:25 davidg
* added no multi-buffer override for 3c503
*
* Revision 2.1 93/09/29 12:32:12 davidg
* changed multi-buffer count for 16bit 3c503's from 5 to 2 after
* noticing that the transmitter becomes idle because of so many
* packets to load.
*
* Revision 2.0 93/09/29 00:00:19 davidg
* many changes, rewrites, additions, etc. Now supports the
* NE1000, NE2000, WD8003, WD8013, 3C503, 16bit 3C503, and
* a variety of similar clones. 16bit 3c503 now does multi
* transmit buffers. Nearly every part of the driver has
* changed in some way since rev 1.30.
files.i386.newconf: Remove lpa.
TEST: Enable lms and lpt.
*: Change all lpa's to lpt's. Change fd[0-3] to fd* and wd[0-3] to wd*.
Remove all explicit irq's.
time conversion in delay().
fd.c: Minor changes to autoconfig. Use dv_parent rather than storing another
pointer to the fdc_softc in each fd_softc. Change disk label stuff for our
kernel.
icu.s: Make splx() and splnone() return previous cpl for now.
isa.c: Minor autoconfig changes.
isa.h: rtcin() is now nvram() and is declare in nvram.h. Make isaphysmem a
caddr_t.
pccons.c: XXXX: Maybe we should insist they open /dev/io now.
timerreg.h: #define TIMER_NPORTS.
wd.c: Delete unused wdnoreloc() and wddospart(), and use remaining two bits in
unit number. struct disk --> struct wd_softc. struct board --> struct
wdc_softc. Still needs much work.
mycroft