Subject: Bugfix for SB16 with DSP version 4 and above
No description sent, but it appears to fix a major number problem
with certain models of the SB16.
Small hack, if heads > 16, output a warning and then set the head
count to 16. This stops the infinite loop on this error and allows
people to later fix the DOS parameter table later with fdisk.
run Exabyte 8505 on 1742's. This may not be the final solution, but it
makes it work. It may be better to change the DELAY(10) to DELAY(30)
inside the loop instead of increasing the loop count from 100 to 300.
Subject: Bug Fix for ft.c - please commit
Date: Mon, 14 Feb 94 10:22:54 CST
This fixes a bug where the system can crash if the tape is used
after the floppy has been used.
a pv chain was being traversed while interrupts were
fully enabled in pmap_remove_all ... this is bogus, and
has been fixed in pmap.c. (sorry for adding the splimp)
Description:
The integer overflow instruction (into) and the interrupt instruction with
value 4 (int #4) both give rise to SIGBUS signals rather than SIGFPE. The
problem is that overflow is a trap not a fault (unlike the BOUND instruction).
When the keyboard is probed, the LED's blink quickly and
"Keyboard reset failed" is printed on the console. The
init routine keeps trying endlessly with the same behavior
as above.
I got the latest -current sup sources (06-Feb-94 12:00 GMT) to work using the
old syscons.c. The following patch makes the new syscons work:
2) Make SNAKE_SAVER like default, if no saver specified in "options"
3) Remove #ifdef STAR_SAVER before line /* make screensaver happy */
this code needed in any case.
Subject: syscons-1.3
Date: Sat, 29 Jan 94 23:33:50 MET
But here is the (hopefully) final syscons-1.3....
....
I've changed sgetc so it works as the pccons parallel
(it now uses a scgetc internally).
[
There were a couple changes that Bruce Evans sent me that were applied
to this version along with some changes that S'ren didn't incorporate
into the final version. There will be only minor changes if anything
from this version to his final release.
]
o merged and fixed timeout code from sos.
o merged DOS partition support from sos.
o fixed "extra" interrupts.
o check if malloc retuns NULL :-(.
o print drive size as in NetBSD
o after an error, return the residual count, not 0.
o give up early for > 16 heads.
o cleaned up the old-drive detection in wdgetctlr().
o rewrote wddump(). I'd been putting this off because
I'd had the dump disabled since 0.0 and had no idea
if even the standard version worked. It didn't:
(0) syscons' sgetc() interface broke some keyboard
stuff.
(1) CADDR1 is mapped using pmap() and pmap got a NULL
pointer trap (at least when I got to wddump() using
call diediedie from ddb) because the pte for CADDR1
is only supposed to be hacked on directly (e.g. in
physcopyseg()).
(2) bad144 handling was not done.
(3) it was slooow (3600 sectors/minute) because my
controller doesn't cache writes.
o miscellaneous other cleanups, e.g., removed scattered
patchkit/terry dates.
o lots of reformatting.
To be done:
o Merge/fix TIH/NetBSD bad144 code (doesn't belong in any
particular driver. Why aren't we using i386/dkbad.c?).
o Merge/fix Dyson/NetBSD clustering code (large parts
should be shared).
o Fix/extend the partition in use bits. Support extended
partitions. This should be shared by all disk drivers. Swap
to a DOS partition so that the swap space can be shared with
linux.
o Don't use polling except for initialization. Need to
reorganise the state machine. Then "extra" interrupts
shouldn't happen (except maybe one for initialization).
o Fix disklabel, boot and driver inconsistencies with
bad144 in standard versions.
o Look at latest linux clustering methods. Our disksort()
gets in the way of clustering.
o cleaned up the ATA changes (needs more work. I think
the ATA specs say that the only thing really wrong with
the original version of wx is that there was no test
for drive-ready before some commands. 400 nsec delay
suffices for almost everything and 400 nsec delay is
usually "free").
netmask or impmask.
2) Fixes from Bruce:
o Changed name of schedsoftcom() to setsofttty() to match
setsoftclock()
o Bool_t isn't used.
o tx_fifo_size is 1 for chips without fifos, 16 for 16550's, to
help to output more efficiently for 16550's (LSR_TXRDY means
that the fifo is empty, not that it has space for one char).
o Changed name of softsio1() to siopoll() and merged compoll()
into siopoll().
o The probe forgot to clear com_mcr after it failed. This is
harmful for 4 single serial ports on 2 interrupts. It makes
partial misconfigurations worse.
o Don't bother initializing static variables that are 0 (bidir
stuff).
o Only initialize t_oflag to TTYDEF_OFLAG if unit == COMCONSOLE,
not if COMCONSOLE is defined.
o Don't call siointr() from comparam() if there is no output in
progress. For the call from sioopen(), there's no output in
progress, and siointr() often saw silo overflows for stale
input because it was called before sioopen() discarded the
input.
o Let ttselect() do the work for select(), so that the fixes for
ttselect() don't have to be duplicated in zillions of drivers.
Yes, I know that IFADDR ioctl is supposed to be deprecated... Note
that the patch was modified by me to fit better into the driver. -DG
...
While porting CAP to 386bsd/pk0.2.4 and now to FreeBSD Release 1.0
I found a couple of bugs associated with the packet filter. Here
are the fixes. I'm posting them here because they apply to
FreeBSD and 386bsd/pk0.2.4 and possibly to other *BSD.
The first occurs when using the packet filter to write raw
ethernet packets. The header consisting of the sender and
destination addresses and the protocol is removed and later
added back on, but with the byte order of the protocol reversed.
The fix ensures that the byte order in the protocol field is
swapped when it is removed.
The second fix ensures that SIOCGIFADDR works for BPF as claimed
in the man pages, by adding it to the ed driver. Similar fixes
will be needed for other ethernet drivers.
Dave Matthews.
file override to disable fifo on 16550s:
I bought a board with two 16550's, but one of those ports has a mouse
on it. The sio driver always enables the fifo, which is a bad thing
for mice and X. The mouse is jerky and hard to use. The simple thing
is be to treat one of the ports as a non-fifo'ed UART, and I use the
flags option in my config file.
So, my config file has:
device sio0 at isa? port "IO_COM1" tty irq 4 flags 0x2 vector siointr
device sio1 at isa? port "IO_COM2" tty irq 3 vector siointr
(patch deleted)
following is a summary:
1) increased object cache back up to a more reasonable value.
2) removed old & bogus cruft from machdep.c (clearseg, copyseg,
physcopyseg, etc).
3) inlined many functions in pmap.c
4) changed "load_cr3(rcr3())" into tlbflush() and made tlbflush inline
assembly.
5) changed the way that modified pages are tracked - now vm_page struct
is kept updated directly - no more scanning page tables.
6) removed lots of unnecessary spl's
7) removed old unused functions from pmap.c
8) removed all use of page_size, page_shift, page_mask variables - replaced
with PAGE_ constants.
9) moved trunc/round_page, atop, ptoa, out of vm_param.h and into i386/
include/param.h, and optimized them.
10) numerous changes to sys/vm/ swap_pager, vnode_pager, pageout, fault
code to improve performance. LRU algorithm modified to be more
effective, read ahead/behind values tuned for better performance,
etc, etc...
Cuddle { braces up where possible on if statements
Add missing splx(s) calls before some returns.
Remove extra semicolon that was keeping uha_init from returning
before the timeout occured. This should speed probing up quite
a bit!
0) FreeBSD additional include files additions
1) Rod's arpacom changes
2) Function type and return code cleanup, and all functions have correct
casting to the correct data types
3) Bugfix where driver would not function due to missing structure not
given a value.
4) General cleanup. (Theo did a lot already, I just did some more)
Removed com port comments, since we are about to depricate the driver.
Fix several plaes in LINT where people have been cutting and pasting using
xterms :-(
the device close routine. This works because the device close calls
the line discipline close (which only flushes the output buffers) and
the ttyclose() routine, which does little of nothing except screw with
the session and process group fields (which is what was causing all
the problems).
Date: Mon, 17 Jan 94 20:52:14 PST
As reported on the -bugs list by some one, and confirmed by Julian:
> I increased AHA_RESET_TIMEOUT in aha1542.c from 1000 to 10000
> and now my 1542C is found everytime.
problem with some chipsets (UMC) remapping the 'hole' memory even when
you've got 16MB. People were led to believe that since there was only
16MB of memory in the machine, that they were okay wrt the ISA DMA
limit. This hack simply causes the extra memory to be ignored if it
appears around the 16MB limit.
* Removed pmap_is_wired
* added extra cli/sti protection in idle (swtch.s)
* slight code improvement in trap.c
* added lots of comments
* improved paging and other algorithms in VM system
Changed the output of the isa probe routine, that only devices, that
have an IO address and are smaller than 0x100 to be on the motherboard.
The seagate SCSI adapter is an example of a card, that doesn't have
an IO address and works only memory mapped.
Choose older MULTIPORT version, because lastest bde version
not worked.
Don't force HUPCL for bidirectional case.
From bde:
Use bit (1 << (16 + 4)) in schedsoftcom() to avoid clash with
non-serial h/w on IRQ4.
Allow FIFO_TRIGGER in config.
Clear com->mcr_image when clearing mcr for init of 4port. The
usual value MCR_IENABLE should have broken 4ports unless
something happened to clear it later.
Turn off interrupts as well as DTR after an error waiting for
carrier (bidir dialin case).
Drain fifo more carefully.
Don't hang up if debugging.
Rearrange siointr() -> siointr1() for multiport case for speed,
lower latency and clarity.
Use suser() to check perms.
Provide missing splx() after failed perms checks.
c_ispeed == 0 means c_ispeed = c_ospeed (POSIX).
Set parameters (except speed) for c_ospeed == 0 as well as
hanging up.
Better initialization for console (fifo stuff...).
Misc. cleanups.
Fix dead hang if modem power is off.
problems in the moment are stray intr's in the ifconfig up/down.
No way to select all three interfaces on a combo card with
AUI/BNC/UTP interfaces and the performance doesn't look good.
Only tested with a ISA AUI/BNC card yet.
Added it to the list of known boards and put it into the the list for
the mailbox unlock. Maybe all board-ids over 0x42 should be in the
mailbox unlock part ?
enough tests to be considered more stable than current driver.
Lots of work by Bruce, David G., and Guido have gone into this version, and
more is to come in the future.
Support for multiple controllers is in, but doesn't work correctly with
different controllers (IDE AND MFM), but multiple alike controllers appears
to work.
Most of the stray interrupts problems should be fixed, although you will
get a couple 'extra interrupts' when disklabeling and on startup.
can actually write a sane netif device to support one of these. Note that it
was necessary to steal a netisr bit from another protocol; I took the one for
PF_DATAKIT (no great loss).
a binary link-kit. Make all non-optional options (pagers, procfs) standard,
and update LINT to reflect new symtab requirements.
NB: -Wtraditional will henceforth be forgotten. This editing pass was
primarily intended to detect any constructions where the old code might
have been relying on traditional C semantics or syntax. These were all
fixed, and the result of fixing some of them means that -Wall is now a
realistic possibility within a few weeks.
Entries for 800 and 820 fixed.
From vak@kiae.su:
incorporate Joerg Wunsch formatting code
correct handle timeouted operations
fixed entry for 720 media
GAP values changed suitable for possible format code addition.
Read/write GAP always 2 now.
Interleave parameter added for possible format code addition.
Many logical formats added.
720K physical drive added.
Problems: still can't read 720..820 media in 1.44 drive.
800K in HD 5.25in (maximum for DD diskettes)
1.44M in HD 5.25in (for easy distributions)
1.46M in HD 5.25in (maximum for 5.25)
Some cosmetique changes.
Now minor looks like UU DDDDDD, UU - unit, DDDDDD - density.
If density == 0, CMOS-detect format assumed.
Fix attach code for correct work with unknown CMOS
floppy types.
Trick diskerr to handle new minor.
1.722M floppy in 1.44M drive popular format added.
from:
Sergey Ryzhkov, Serge Vakulenko
E-mail: <sir@kiae.su>, <vak@zebub.msk.su>
This is the streamer tape driver for 386bsd and FreeBSD, which
supports Wangtek and Archive compatible QIC-02/QIC-36 controllers.
It was developed as a replacement of the old Wangtek tape driver from CMU.
In comparison with the CMU driver, this version has the following enhancements:
1) Support for Archive SC402 and SC499 tape controllers added.
2) Support for up to three tape controllers on the same machine.
3) Support for BSD-style ioctls MTIOCGET, MTIOCTOP.
Mt command now works adequately with this driver.
2) Asynchronous REWIND and FSF operations, close() will not wait
until they finish. The next open() will wait for it instead.
4) Use of WTQICMD ioctl is limited to ERASE and RETENS operations.
This prevents the user from locking the tape driver by strange
tape operations.
5) Tape density switching added.
6) The status of the process, blocked on the tape operation,
is displayed at the WCHAN column of the `ps' command as:
wtread reading data from the tape
wtwrite writing data to the tape
wtrfm reading the tape marker
wtwfm writing the tape marker
wtrew rewinding the tape
wterase doing WTQICMD ERASE operation
wtretens doing WTQICMD RETENS operation
wtorew doing MTIOCTOP REW/OFFL operation
wtorfm doing MTIOCTOP FSF operation
wtowfm doing MTIOCTOP WEOF operation
7) It's possible to use the tape with "default density",
useful for devices which don't support density switching
or do automatic format determination.
8) Some controllers support only 1024 block length.
Setting WT_BSIZE bit in device minor number turns on this mode.
Minor number structure:
0bfffuuu
Fields:
uuu - Unit number. It's possible to install
up to three tape controllers on the same machine,
using DRQs 1..3. Hence, unit number can lie
in range 0..2.
fff - Tape format number:
0 - /dev/rwt0 - default density (auto select)
1 - /dev/rwt0a - QIC 11 (obsolete)
2 - /dev/rwt0b - QIC 24 (60 megabytes)
3 - /dev/rwt0c - QIC 120 (120 megabytes)
4 - /dev/rwt0d - QIC 150 (150 megabytes)
5 - /dev/rwt0e - QIC 300 (300 megabytes?)
6 - /dev/rwt0f - QIC 600 (600 megabytes?)
b - Long block size flag. With this bit set,
the driver will perform all i/o operations
with the controller using 1024-byte
blocks, instead of 512 ones.
Some controllers need it (CMS for example).
If you Wangtek controller does not stream well,
you can try to use /dev/rWt0 device instead
of /dev/rwt0 (uncomment needed lines in /dev/MAKEDEV
to create it).
Block interface (writing blocks less than 2048 bytes) is not functioning
pwoperly. Use raw interface instead.
Thanks to all who helped to test it on the following hardware:
Controller Drive Volume Interface Thanks to
---------------------------------------------------------------------------
Archive SC-499 Archive 2150L 150 Meg QIC-02 KIAE
CMS? ? 150 Meg QIC-02 KIAE
Everex EV 831/833 ? ? QIC-36 Joergen Haegg
Wangtek ASSY Wangtek 60 Meg QIC-02 Ken Whedbee
Tecmar QT150i? Wangtek 5150EQ ? QIC-02? Marko Teiste
? Wangtek 5099EK 60 Meg QIC-36 Robert Shien
Archive SC400S ? 60 Meg ? Warren Toomey
possible end-user errors.
Now:
1) on physical 1.2 can open logical 1.2, 720, 360H
2) on physical 1.44 can open logical 1.44, 720
3) on physical 360 can open logical 360
All other variants refused.
C-style improved in this check, multiply if's changed to switch.
More work to add 720K floppy support.
Restore good old dependance of device and floppy type.
Now:
fd?a == 1.44
fd?b == 1.2
fd?c == 720
fd?d == 360 in HD
fd?e == 360
Add more strict size check in Fdopen, not it refuse:
1) Attempt to open any type expect fd?e, if you have only 360K drive.
2) Attempt to open fd?a if you have only 1.2 drive.
John Dyson to make it reliably work under FreeBSD.
2) Added and enabled PROCFS in the GENERICxx and LINT kernels.
3) New execve() from me. Still work to be done here, but this version
works well and is needed before other changes can be made. For
a description of the design behind this, see freebsd-arch or
ask me.
4) Rewrote stack fault code; made user stack VM grow as needed rather
than all up front; improves performance a little and reduces
process memory requirements.
5) Incorporated fix from Gene Stark to fault/wire a user page table
page to fix a problem in copyout. This is a temporary fix and
is not appropriate for pageable page tables. For a description
of the problem, see Gene's post to the freebsd-hackers mailing
list.
6) Tighten up vm_page struct to reduce memory requirements for it. ifdef
pager page lock code as it's not being used currently.
7) Introduced new element to vmspace struct - vm_minsaddr; initial
(minimum) stack address. Compliment to vm_maxsaddr.
8) Added a panic if the allocation for process u-pages fails.
9) Improve performance and accuracy of kernel profiling by putting in
a little inline assembly instead of spl().
10) Made serial console with sio driver work. Still has problems with
serial input, but is almost useable.
11) Added -Bstatic to SYSTEM_LD in Makefile.i386 so that kernels will
build properly with the new ld.
added to probe.
2) Force CLOCAL=on for outgoing ports and CLOCAL=off for
incoming ports into open in bidirectional case.
3) Add DELAY after writing to com_ier for fifo drain into probe.
The following patch adds the addr argument to signal handlers.
The kernel with the patch is no more and no less in compliance or in
violation of POSIX and ANSI C than the kernel before the patch.
The added functionality this addr argument provides is quite useful. It
enables an entire class of algorithms which use mprotect to trace memory
references. Beside garbage collectors, I have heard of this technique being
applied to debuggers and profilers. The only benchmarking I've performed is
using akcl to compile maxima: without the kernel patch, it takes 7 hours to
compile maxima, while with stratified garbage collection, it only takes 50
minutes.
Basically, I can't think of a reason not to add the addr argument and there
is a compelling need for it.
If you find the patch acceptable, please let me know so I can send my
FreeBSD akcl config files to wfs for inclusion in the core akcl release.
The old 386BSD config files there won't work on either NetBSD or FreeBSD.
From: <dec@lazarus.nrtc.northrop.com>
Changes between EPSILON and RELEASE of FreeBSD have again caused
the kernel to not see my floppy disk drives. I don't know what happened,
'cause I don't see any changes to fd.c, but here is an old fix that
I have applied to the probe routine which will solve the problem (at
least for me). Since this is a rather brute-force solution - I understand
if you want to ignore it...
[Upgrading to pre-Beta FreeBSD caused this on my system. -AM]
* merged in Garrett Wollman's strict prototype changes
*
* Revision 2.15 1993/11/29 16:32:58 davidg
* From Thomas Sandford <t.d.g.sandford@comp.brad.ac.uk>
* Add support for the 8013W board type
Subject: Page fault in PTE area fails in copyout
Index: sys/i386/i386/trap.c FreeBSD-1.0.2
Description:
Reading files of several megabytes into Emacs, or many small
files all at once, would fail with "IO error - bad address".
Repeat-By:
The bug can be exercised by a test program that malloc()'s
a 5MB chunk of memory, and then, without accessing the memory
first, filling it with data from a file using read().
(I read 64k chunks from /dev/wd0d into successive 64k regions
of the 5MB chunk.) The read() will fail with EFAULT at the first
virtual address boundary that is a multiple of 0x400000.
Fix:
The problem was code in sys/i386/i386/trap.c that tries to
figure out what kind of trap occurred and to handle it appropriately.
It was interpreting any page fault with virtual address
>= vm->vm_maxsaddr as being a user stack segment fault.
In fact, addresses >= USRSTACK are in the user structure/PTE area,
and if they are handled as stack faults, the proper PTE will
not be paged in when it is supposed to be. This situation comes
up in copyout() and copyoutstr(), if PTE's are accessed for the
first time ever. The page fault on accessing the nonexistent PTE
is mishandled as a stack fault, and then the fault that occurs on
the subsequent access to the page itself causes copyout to fail
with EFAULT.
From: Geoff Rehmet <g89r4222@braae.ru.ac.za>
Description:
On bootup, probe of wd drives fails (CP30104), and kernel panics
- cannot mount root
It appears that the device probe just times out.
Increasing the timeout back to its old value fixes the problem.
Repeat-By:
SUP FreBSD-current, Find a CP30104 ..... (ok ok ok)
Basically - Soren's changes barf my disk.
---
From: sos@login.dkuug.dk (S|ren Schmidt)
Subject: IDE-disk hangs - solution/patches NetBSD/FreeBSD
Summary: fixes for lost interrupts with IDE disks
Keywords: hanging-disk, IDE-disk, lost-interrupt
Due to "popular" demand I'm posting these patches to NetBSD/FreeBSD
instead of mailing them around the world :-)
As many have found out there is a problem when using IDE disks on
FreeBSD. Following is a patch that fixes the problem with lost intterrupts.
Both fixes is based on a patch posted here some month ago by
Stefan Behrens?? (sorry I've lost the original article). But anyway it
works (for me :-).
Basically it does a timeout on lost interrupts, starting the operation
again and logging and error message on the console.
It additionally makes the allready present while loop timeouts
independent of CPU speed, and adds minor numbers for easy access to
dos partitions.
* change all splnet's to splimp's
*
* Revision 2.13 1993/11/22 10:53:52 davidg
* patch to add support for SMC8216 (Elite-Ultra) boards
* from Glen H. Lowe
*
* Revision 2.12 1993/11/07 18:04:13 davidg
* fix from Garrett Wollman:
* add a return(0) at the end of ed_probe so that if the various device
* specific probes fail that we just don't fall of the end of the function.
Change movl %es: -2(reg) to use a subl $2,reg when fixing up the IDT
entries for bdb. This seems to be the best way to go.
Some day soon #ifdef BDB all of Bruces debugger code.
when the machine panics.
i386/i386/locore.s:
1) got rid of most .set directives that were being used like
#define's, and replaced them with appropriate #define's in
the appropriate header files (accessed via genassym).
2) added comments to header inclusions and global definitions,
and global variables
3) replaced some hardcoded constants with cpp defines (such as
PDESIZE and others)
4) aligned all comments to the same column to make them easier to
read
5) moved macro definitions for ENTRY, ALIGN, NOP, etc. to
/sys/i386/include/asmacros.h
6) added #ifdef BDE_DEBUGGER around all of Bruce's debugger code
7) added new global '_KERNend' to store last location+1 of kernel
8) cleaned up zeroing of bss so that only bss is zeroed
9) fix zeroing of page tables so that it really does zero them all
- not just if they follow the bss.
10) rewrote page table initialization code so that 1) works correctly
and 2) write protects the kernel text by default
11) properly initialize the kernel page directory, upages, p0stack PT,
and page tables. The previous scheme was more than a bit
screwy.
12) change allocation of virtual area of IO hole so that it is
fixed at KERNBASE + 0xa0000. The previous scheme put it
right after the kernel page tables and then later expected
it to be at KERNBASE +0xa0000
13) change multiple bogus settings of user read/write of various
areas of kernel VM - including the IO hole; we should never
be accessing the IO hole in user mode through the kernel
page tables
14) split kernel support routines such as bcopy, bzero, copyin,
copyout, etc. into a seperate file 'support.s'
15) split swtch and related routines into a seperate 'swtch.s'
16) split routines related to traps, syscalls, and interrupts
into a seperate file 'exception.s'
17) remove some unused global variables from locore that got
inserted by Garrett when he pulled them out of some .h
files.
i386/isa/icu.s:
1) clean up global variable declarations
2) move in declaration of astpending and netisr
i386/i386/pmap.c:
1) fix calculation of virtual_avail. It previously was calculated
to be right in the middle of the kernel page tables - not
a good place to start allocating kernel VM.
2) properly allocate kernel page dir/tables etc out of kernel map
- previously only took out 2 pages.
i386/i386/machdep.c:
1) modify boot() to print a warning that the system will reboot in
PANIC_REBOOT_WAIT_TIME amount of seconds, and let the user
abort with a key on the console. The machine will wait for
ever if a key is typed before the reboot. The default is
15 seconds, but can be set to 0 to mean don't wait at all,
-1 to mean wait forever, or any positive value to wait for
that many seconds.
2) print "Rebooting..." just before doing it.
kern/subr_prf.c:
1) remove PANICWAIT as it is deprecated by the change to machdep.c
i386/i386/trap.c:
1) add table of trap type strings and use it to print a real trap/
panic message rather than just a number. Lot's of work to
be done here, but this is the first step. Symbolic traceback
is in the TODO.
i386/i386/Makefile.i386:
1) add support in to build support.s, exception.s and swtch.s
...and various changes to various header files to make all of the
above happen.
if something changes which doesn't affect it, locore doesn't have to get
rebuilt. This is at the cost of a genassym and a cmp in every compile,
until someone can figure out how to make `make' smarter itself.
pccons or syscons usage. Modified comment in LINT for FAT_CURSOR.
Now the FAT_CURSOR can be controlled over the option, instead of hacking
syscons.c and pccons.c.
the stack area and not memory above VM_MAXUSER_ADDRESS.
That way, copyout and friends now work for pages whose page table entries
have not yet been allocated/been paged out.
machines (now 20% of all memory after the first 3MB). This is necessary
in order for 4MB machine to be able to rebuild the entire source tree
and not run out of physical memory because of fixed memory requirements
of processes and kernel VM.
set when extended translation is turned on, thus we need to do the mailbox
unlock command no matter what value is in the extended bios flag byte as
the other extensions (ie, > 2 drive support) cause the same problems.
The code has been changed to ALWAYS unlock the mailbox interface on ALL
1542C class boards.
called once when card is attached. Solved problem with driver
getting hosed when a reset takes place.
Removed init_block array -- now part of malloced memory. No more
static declarations left.
Added code so that debug ioctl actually does something.
ifconfig is0 debug will now switch on debugging code.
Other general cleanups.
