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History log of /src/sys/arch/x68k/dev/fd.c
RevisionDateAuthorComments
 1.129  07-Jan-2024  isaki TAB/space/indent cleanup.
 1.128  17-Dec-2023  andvar s/FD_DEBUG/FDDEBUG/ for consistency.
 1.127  26-May-2022  tsutsui Make local functions and variable static.
 1.126  23-May-2022  tsutsui Remove unused variables.
 1.125  07-Aug-2021  thorpej Merge thorpej-cfargs2.
 1.124  24-Apr-2021  thorpej branches: 1.124.8;
Merge thorpej-cfargs branch:

Simplify and make extensible the config_search() / config_found() /
config_attach() interfaces: rather than having different variants for
which arguments you want pass along, just have a single call that
takes a variadic list of tag-value arguments.

Adjust all call sites:
- Simplify wherever possible; don't pass along arguments that aren't
actually needed.
- Don't be explicit about what interface attribute is attaching if
the device only has one. (More simplification.)
- Add a config_probe() function to be used in indirect configuiration
situations, making is visibly easier to see when indirect config is
in play, and allowing for future change in semantics. (As of now,
this is just a wrapper around config_match(), but that is an
implementation detail.)

Remove unnecessary or redundant interface attributes where they're not
needed.

There are currently 5 "cfargs" defined:
- CFARG_SUBMATCH (submatch function for direct config)
- CFARG_SEARCH (search function for indirect config)
- CFARG_IATTR (interface attribte)
- CFARG_LOCATORS (locators array)
- CFARG_DEVHANDLE (devhandle_t - wraps OFW, ACPI, etc. handles)

...and a sentinel value CFARG_EOL.

Add some extra sanity checking to ensure that interface attributes
aren't ambiguous.

Use CFARG_DEVHANDLE in MI FDT, OFW, and ACPI code, and macppc and shark
ports to associate those device handles with device_t instance. This
will trickle trough to more places over time (need back-end for pre-OFW
Sun OBP; any others?).
 1.123  10-Nov-2019  chs branches: 1.123.10;
in many device attach paths, allocate memory with M_WAITOK instead of M_NOWAIT
and remove code to handle failures that can no longer happen.
 1.122  08-Feb-2019  mrg make *fd*.c's fd_dev_to_type() always a static inline. some
have it as a const, and have code to copy the defaults to
modify them before using them, but that probably requires a
real test to feel confident in changing.
 1.121  03-Sep-2018  riastradh Rename min/max -> uimin/uimax for better honesty.

These functions are defined on unsigned int. The generic name
min/max should not silently truncate to 32 bits on 64-bit systems.
This is purely a name change -- no functional change intended.

HOWEVER! Some subsystems have

#define min(a, b) ((a) < (b) ? (a) : (b))
#define max(a, b) ((a) > (b) ? (a) : (b))

even though our standard name for that is MIN/MAX. Although these
may invite multiple evaluation bugs, these do _not_ cause integer
truncation.

To avoid `fixing' these cases, I first changed the name in libkern,
and then compile-tested every file where min/max occurred in order to
confirm that it failed -- and thus confirm that nothing shadowed
min/max -- before changing it.

I have left a handful of bootloaders that are too annoying to
compile-test, and some dead code:

cobalt ews4800mips hp300 hppa ia64 luna68k vax
acorn32/if_ie.c (not included in any kernels)
macppc/if_gm.c (superseded by gem(4))

It should be easy to fix the fallout once identified -- this way of
doing things fails safe, and the goal here, after all, is to _avoid_
silent integer truncations, not introduce them.

Maybe one day we can reintroduce min/max as type-generic things that
never silently truncate. But we should avoid doing that for a while,
so that existing code has a chance to be detected by the compiler for
conversion to uimin/uimax without changing the semantics until we can
properly audit it all. (Who knows, maybe in some cases integer
truncation is actually intended!)
 1.120  11-Aug-2017  isaki branches: 1.120.2; 1.120.4;
Allow dmac_alloc_channel() to specify DCR and OCR.
FDC uses 'Cycle Steal Mode with Hold' but ADPCM
should use 'Cycle Steal Mode without Hold' on x68k.
From Y.Suhagara and it was found by XM6i.
 1.119  12-Jan-2017  isaki branches: 1.119.8;
Fix the possibility of off-by-one on the grammer. Reported by coypu.
Currently it never happens because type is (minor number % 7) and
the arraycount of fd_types[] is 8. I.e., it is a dead code...
However, when the capacity of the FDTYPE() changes or the arraycount
of fd_types[] changes, this correction will be effective.
 1.118  11-Jul-2015  kamil branches: 1.118.2;
Improve spelling: regsiter -> register

This change is non-functional.

Approved by <riastradh>, <pgoyette>
 1.117  26-Apr-2015  mlelstv Use C99-style initializers for struct dkdriver.
 1.116  13-Apr-2015  riastradh MD rnd.h cleanups. Please let me know if I broke anything!
 1.115  02-Jan-2015  christos We have three sets of DTYPE_ constants in the kernel:
altq Drop Type
disklabel Disk Type
file Descriptor Type
(not to mention constants that contain the string DTYPE).
Let's make them two, by changing the disklabel one to be DisK TYPE since the
other disklabel constants seem to do that. Not many userland programs use
these constants (and the ones that they do are mostly in ifdefs). They will
be fixed shortly.
 1.114  02-Jan-2015  christos restore part decl.
 1.113  01-Jan-2015  christos declare error
 1.112  31-Dec-2014  christos make more drivers use disk_ioctl, and add a dev parameter to it so that
we can merge the "easy" disklabel ioctls to it. Ultimately all this will
go do dk_ioctl once all the drivers have been converted.
 1.111  10-Aug-2014  tls branches: 1.111.4;
Merge tls-earlyentropy branch into HEAD.
 1.110  25-Jul-2014  dholland Add d_discard to all struct cdevsw instances I could find.

All have been set to "nodiscard"; some should get a real implementation.
 1.109  25-Jul-2014  dholland Add d_discard to all struct bdevsw instances I could find.

I've set them all to nodiscard. Some of them (wd, dk, vnd, ld,
raidframe, maybe cgd) should be implemented for real.
 1.108  26-Mar-2014  christos branches: 1.108.2;
kill sprintf, fix unused.
 1.107  16-Mar-2014  dholland Change (mostly mechanically) every cdevsw/bdevsw I can find to use
designated initializers.

I have not built every extant kernel so I have probably broken at
least one build; however I've also found and fixed some wrong
cdevsw/bdevsw entries so even if so I think we come out ahead.
 1.106  24-May-2013  christos branches: 1.106.2;
kill bogus inline
 1.105  14-Oct-2012  tsutsui KNF and space nits
 1.104  14-Oct-2012  tsutsui Add floppy format support. Mostly taken from sys/dev/isa/fd.c.

Tested both fdNa (1232KB, 1024bytes/sector, 8sectors/track) and
fdNc (1200KB, 512bytes/sector, 15sectors/track) format on X68030
using fdformat(1).

Finally we can prepare NetBSD/x68k install floppies without Human68k
(except actual initial bootstrap).
 1.103  14-Oct-2012  tsutsui Terminate DMAC and call bus_dmamap_unload(9) properly in all FDC xfer
error paths, as sys/dev/isa/fd.c does. Fixes unexpected DMAC errors
(and possible VM panic due to un-unloaded dmamap) on the first floppy
access after read/write errors.
 1.102  14-Oct-2012  tsutsui Before probing floppy drives, call NE7CMD_SENSEI and fdcresult()
to drain possible pending FDC interrupts. Taken from sys/dev/isa/fd.c.
Hopefully might fix occasional fd drive probe failure (but not confirmed).
 1.101  15-May-2012  tsutsui branches: 1.101.2;
- check bus_space_map(9) return value
- use BUS_SPACE_MAP_SHIFTED_ODD for clarify
- define and use proper macro instead of magic
 1.100  13-May-2012  tsutsui KNF and cosmetics. No binary change.
 1.99  13-May-2012  tsutsui - use <sys/bus.h> rather than <machine/bus.h>
- no need to include uvm_extern.h
- include "ioconf.h" for struct cfdriver foo_cd
 1.98  12-May-2012  tsutsui Explicitly specify a proper FDC data register address for HD63450 DMAC
to avoid confusion.

Previous one (fdc->sc_addr + fddata) wasn't a right address for
the FDC's data register but one for the command register by accident,
but FDC ignores A0 address input (connected to A1 of x68k address bus)
during DMA xfer (i.e. when DACK is asserted) so it happened to work
as expected on the real X680x0 hardware, but caused trouble on emulators.

The inconsistency was found by Y.Sugahara during debugging XM6i emulator
(and it will be fixed in the next release).
FDC behavior during DMA is confirmed by uPD72068 hardware application note.

XXX: There is no proper MI API to specify DMA address for DMA controller
(like MC68450) to access devices mapped to memory space by bus_space(9).
 1.97  06-May-2012  tsutsui Make x68k's floppy driver actually work with proper bounce buffer xfer ops
on machines with extended high memories:

- dev/fd.c:
- add missing bus_dmamap_sync(9) POSTREAD/POSTWRITE ops

- x68k/machdep.c:
- update avail_end variable (which is used to check DMA'able memory range
in intio.c) properly per probed extended memory regions

The problem was found during debugging XM6i's FDC emulation by
Y.Sugahara, isaki@, and me.

Should be pulled up to netbsd-6.
 1.96  02-Feb-2012  tls branches: 1.96.2;
Entropy-pool implementation move and cleanup.

1) Move core entropy-pool code and source/sink/sample management code
to sys/kern from sys/dev.

2) Remove use of NRND as test for presence of entropy-pool code throughout
source tree.

3) Remove use of RND_ENABLED in device drivers as microoptimization to
avoid expensive operations on disabled entropy sources; make the
rnd_add calls do this directly so all callers benefit.

4) Fix bug in recent rnd_add_data()/rnd_add_uint32() changes that might
have lead to slight entropy overestimation for some sources.

5) Add new source types for environmental sensors, power sensors, VM
system events, and skew between clocks, with a sample implementation
for each.

ok releng to go in before the branch due to the difficulty of later
pullup (widespread #ifdef removal and moved files). Tested with release
builds on amd64 and evbarm and live testing on amd64.
 1.95  19-Nov-2011  tls branches: 1.95.2;
First step of random number subsystem rework described in
<20111022023242.BA26F14A158@mail.netbsd.org>. This change includes
the following:

An initial cleanup and minor reorganization of the entropy pool
code in sys/dev/rnd.c and sys/dev/rndpool.c. Several bugs are
fixed. Some effort is made to accumulate entropy more quickly at
boot time.

A generic interface, "rndsink", is added, for stream generators to
request that they be re-keyed with good quality entropy from the pool
as soon as it is available.

The arc4random()/arc4randbytes() implementation in libkern is
adjusted to use the rndsink interface for rekeying, which helps
address the problem of low-quality keys at boot time.

An implementation of the FIPS 140-2 statistical tests for random
number generator quality is provided (libkern/rngtest.c). This
is based on Greg Rose's implementation from Qualcomm.

A new random stream generator, nist_ctr_drbg, is provided. It is
based on an implementation of the NIST SP800-90 CTR_DRBG by
Henric Jungheim. This generator users AES in a modified counter
mode to generate a backtracking-resistant random stream.

An abstraction layer, "cprng", is provided for in-kernel consumers
of randomness. The arc4random/arc4randbytes API is deprecated for
in-kernel use. It is replaced by "cprng_strong". The current
cprng_fast implementation wraps the existing arc4random
implementation. The current cprng_strong implementation wraps the
new CTR_DRBG implementation. Both interfaces are rekeyed from
the entropy pool automatically at intervals justifiable from best
current cryptographic practice.

In some quick tests, cprng_fast() is about the same speed as
the old arc4randbytes(), and cprng_strong() is about 20% faster
than rnd_extract_data(). Performance is expected to improve.

The AES code in src/crypto/rijndael is no longer an optional
kernel component, as it is required by cprng_strong, which is
not an optional kernel component.

The entropy pool output is subjected to the rngtest tests at
startup time; if it fails, the system will reboot. There is
approximately a 3/10000 chance of a false positive from these
tests. Entropy pool _input_ from hardware random numbers is
subjected to the rngtest tests at attach time, as well as the
FIPS continuous-output test, to detect bad or stuck hardware
RNGs; if any are detected, they are detached, but the system
continues to run.

A problem with rndctl(8) is fixed -- datastructures with
pointers in arrays are no longer passed to userspace (this
was not a security problem, but rather a major issue for
compat32). A new kernel will require a new rndctl.

The sysctl kern.arandom() and kern.urandom() nodes are hooked
up to the new generators, but the /dev/*random pseudodevices
are not, yet.

Manual pages for the new kernel interfaces are forthcoming.
 1.94  10-Apr-2011  tsutsui branches: 1.94.4;
Fix hangup on the first floppy access since 2008.
Problem was reported by isaki@.

On X680x0 (and most other machines other than ISA FDC),
the ready line from FDD is connected to FDC and fdc driver can
be notified of the ready state after fd_set_motor() by interrupts.
In this case no need to use callout(9) to wait the FDD motor stabilized,
and the callout(9) method used in ISA fdc(4) driver rather caused
infinite unhandled interrupts since callout(9) was no longer invoked
during interrupt storm after vmlocking2 merge, I guess.

Should be pulled up to netbsd-5.
 1.93  06-Jun-2010  mrg branches: 1.93.2;
fix PR 6724 - convert m68k options to defflag's. this means that
M680[12346] are now available from opt_m68k_arch.h. FPSP meantioned
in the PR has already been fixed, and i could not find any more.

i built these kernels to ensure i did not break their builds:

amiga: GENERIC DRACO
atari: HADES FALCON MILAN-PCIIDE
mac68k: GENERIC
sun2: GENERIC
sun3: GENERIC GENERIC3X
cesfic: attempted GENERIC, does not build due to lack of machine/bus.h
hp300: GENERIC
luna68k: GENERIC
mvme68k: GENERIC
news68k: GENERIC
next68k: GENERIC
x68k: GENERIC
 1.92  18-Jan-2009  isaki branches: 1.92.4; 1.92.6;
Clean up header files.
 1.91  13-Jan-2009  yamt g/c BUFQ_FOO() macros and use bufq_foo() directly.
 1.90  10-Jan-2009  isaki Clean up messages.
- fdcintr: remove duplicated status message.
- fdioctl: make it easy to track ioctl.
 1.89  10-Jan-2009  isaki fdc->sc_dev is not necessary.
 1.88  18-Dec-2008  isaki Make it compilable again.
 1.87  16-Dec-2008  christos replace bitmask_snprintf(9) with snprintb(3)
 1.86  05-Dec-2008  isaki Use TAILQ_* macros.
 1.85  29-Jun-2008  isaki branches: 1.85.2; 1.85.4; 1.85.6;
Make it compilable even if FDDEBUG was defined.
 1.84  25-Jun-2008  isaki Link to device_t. I had forgotten it in previous commit.
 1.83  25-Jun-2008  isaki Split device_t/softc. Use aprint*() and device_xname().
 1.82  14-Jun-2008  isaki Fix compile errors.
 1.81  13-Jun-2008  cegger use device_lookup_private to get softc
 1.80  28-Apr-2008  martin branches: 1.80.2; 1.80.4;
Remove clause 3 and 4 from TNF licenses
 1.79  17-Oct-2007  garbled branches: 1.79.16; 1.79.18; 1.79.20;
Merge the ppcoea-renovation branch to HEAD.

This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the various ports to eliminate near-identical copies of files in
every tree. Additionally there is a new PIC system that unifies the
interface to interrupt code for all different OEA ppc arches. The work
for this branch was done by a variety of people, too long to list here.

TODO:
bebox still needs work to complete the transition to -renovation.
ofppc still needs a bunch of work, which I will be looking at.
ev64260 still needs to be renovated
amigappc was not attempted.

NOTES:
pmppc was removed as an arch, and moved to a evbppc target.
 1.78  08-Oct-2007  ad Merge disk init changes from the vmlocking branch. These seperate init /
destroy of 'struct disk' from attach / detach.
 1.77  29-Jul-2007  ad branches: 1.77.4; 1.77.6; 1.77.8;
It's not a good idea for device drivers to modify b_flags, as they don't
need to understand the locking around that field. Instead of setting
B_ERROR, set b_error instead. b_error is 'owned' by whoever completes
the I/O request.
 1.76  09-Jul-2007  ad branches: 1.76.2; 1.76.4;
Merge some of the less invasive changes from the vmlocking branch:

- kthread, callout, devsw API changes
- select()/poll() improvements
- miscellaneous MT safety improvements
 1.75  20-May-2007  isaki Make it compilable with FDDEBUG.
 1.74  12-May-2007  isaki Clean up white spaces and tabs.
 1.73  11-Mar-2007  isaki branches: 1.73.2; 1.73.8;
white space, indent and KNF.
 1.72  05-Mar-2007  he branches: 1.72.2;
Cast to char* before doing pointer arithmetic.
 1.71  04-Mar-2007  christos Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.
 1.70  14-Apr-2006  blymn branches: 1.70.14;
Make i/o statistics collection more generic, include tape drives and
nfs mounts in the set of devices that statistics will be reported on.
 1.69  28-Mar-2006  thorpej Use device_unit().
 1.68  23-Feb-2006  thorpej branches: 1.68.2; 1.68.4; 1.68.6;
Use device_parent().
 1.67  24-Dec-2005  perry branches: 1.67.2; 1.67.4; 1.67.6;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.
 1.66  11-Dec-2005  christos merge ktrace-lwp.
 1.65  15-Oct-2005  yamt - change the way to specify a bufq strategy. (by string rather than by number)
- rather than embedding bufq_state in driver softc,
have a pointer to the former.
- move bufq related functions from kern/subr_disk.c to kern/subr_bufq.c.
- rename method to strategy for consistency.
- move some definitions which don't need to be exposed to the rest of kernel
from sys/bufq.h to sys/bufq_impl.h.
(is it better to move it to kern/ or somewhere?)
- fix some obvious breakage in dev/qbus/ts.c. (not tested)
 1.64  12-Jun-2005  he branches: 1.64.2;
Sprinkle some consts to allow this to compile with -Wcast-qual.
 1.63  18-Jan-2005  chs de-__P, remove register, ansify.
 1.62  28-Oct-2004  yamt branches: 1.62.4;
move buffer queue related stuffs from buf.h to their own header, bufq.h.
 1.61  08-May-2004  minoura An unexported header file was #included from an exported header file.
Introduce <machine/opmreg.h> and move some definitions useful to
userland progs.
 1.60  15-Nov-2003  isaki make it compilable even if FDDEBUG was defined.
 1.59  01-Nov-2003  jdolecek fix several places where variables might be used uninitialized
 1.58  07-Aug-2003  agc Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.
 1.57  15-Jul-2003  lukem rcsid
 1.56  18-Jun-2003  drochner branches: 1.56.2;
don't #include <sys/dkstat.h> where it is (appearently) unused
 1.55  03-May-2003  wiz DMA, not dma nor Dma.
 1.54  01-Apr-2003  thorpej Use PAGE_SIZE rather than NBPG.
 1.53  02-Feb-2003  isaki Fix printf format for DIAGNOSTIC, in the wake of daddr_t having changed.
Use PRId64, instead of %lld.
 1.52  25-Jan-2003  isaki Make it compilable with 64bit daddr_t.
 1.51  01-Jan-2003  thorpej Use aprint_normal() for cfprint routines.
 1.50  23-Oct-2002  jdolecek merge kqueue branch into -current

kqueue provides a stateful and efficient event notification framework
currently supported events include socket, file, directory, fifo,
pipe, tty and device changes, and monitoring of processes and signals

kqueue is supported by all writable filesystems in NetBSD tree
(with exception of Coda) and all device drivers supporting poll(2)

based on work done by Jonathan Lemon for FreeBSD
initial NetBSD port done by Luke Mewburn and Jason Thorpe
 1.49  20-Oct-2002  isaki Remove unbalanced parenthesis in debug message.
 1.48  13-Oct-2002  isaki Style fixes.
 1.47  02-Oct-2002  thorpej Add trailing ; to CFATTACH_DECL.
 1.46  01-Oct-2002  thorpej Missed one use of CFATTACH_DECL().
 1.45  01-Oct-2002  thorpej Use CFATTACH_DECL().
 1.44  27-Sep-2002  thorpej Declare all cfattach structures const.
 1.43  06-Sep-2002  gehenna Merge the gehenna-devsw branch into the trunk.

This merge changes the device switch tables from static array to
dynamically generated by config(8).

- All device switches is defined as a constant structure in device drivers.

- The new grammer ``device-major'' is introduced to ``files''.

device-major <prefix> char <num> [block <num>] [<rules>]

- All device major numbers must be listed up in port dependent majors.<arch>
by using this grammer.

- Added the new naming convention.
The name of the device switch must be <prefix>_[bc]devsw for auto-generation
of device switch tables.

- The backward compatibility of loading block/character device
switch by LKM framework is broken. This is necessary to convert
from block/character device major to device name in runtime and vice versa.

- The restriction to assign device major by LKM is completely removed.
We don't need to reserve LKM entries for dynamic loading of device switch.

- In compile time, device major numbers list is packed into the kernel and
the LKM framework will refer it to assign device major number dynamically.
 1.42  01-Aug-2002  hannken Convert to new device buffer queue interface.

Approved by: NISHIMURA Takeshi <nsmrtks@netbsd.org>
 1.41  31-Jul-2002  isaki Fix compile warnings in debug code.
 1.40  27-Dec-2001  wiz branches: 1.40.8;
bcopy/bcmp/bzero -> memcpy/memcmp/memset
 1.39  19-Dec-2001  minoura Implement bus_dmamap_sync properly.
dma_cachectl is now used only for DMAC array chain.
 1.38  25-Nov-2001  minoura Avoid using array chaining mode of DMAC.
 1.37  08-Jul-2001  wiz branches: 1.37.2; 1.37.4; 1.37.8;
Correct various misspellings of 'transfer' and inflected forms.
 1.36  02-May-2001  minoura Do not use constants, but macros.
 1.35  29-Jun-2000  mrg branches: 1.35.2;
remove include of <vm/vm.h>. <vm/vm.h> -> <uvm/uvm_extern.h>
 1.34  18-Apr-2000  minoura Explicitly include opt_m680x0.h.
 1.33  07-Apr-2000  thorpej Use separate callouts for motor-on and motor-off. Fixes a condition
where the floppy driver would wedge because a motor-on timeout would
be cancelled by another I/O operation cancelling a motor-off timeout.

From enami tsugutomo <enami@sm.sony.co.jp>.
 1.32  27-Mar-2000  minoura Make this compile (typo in callout change).
 1.31  23-Mar-2000  thorpej New callout mechanism with two major improvements over the old
timeout()/untimeout() API:
- Clients supply callout handle storage, thus eliminating problems of
resource allocation.
- Insertion and removal of callouts is constant time, important as
this facility is used quite a lot in the kernel.

The old timeout()/untimeout() API has been removed from the kernel.
 1.30  07-Feb-2000  thorpej Fix a bug in disksort_*() which caused non-optimal ordering when multiple
active partitions were on a single spindle. Add a b_rawblkno member to
struct buf which contains the non-partition-relative block number to sort
by.
 1.29  21-Jan-2000  thorpej Update for sys/buf.h/disksort_*() changes.
 1.28  24-Mar-1999  minoura branches: 1.28.8; 1.28.14;
Shut up gcc -Wall.
 1.27  24-Mar-1999  mrg completely remove Mach VM support. all that is left is the all the
header files as UVM still uses (most of) these.
 1.26  18-Mar-1999  minoura Correct rnd_attach_source args.
 1.25  16-Mar-1999  minoura Merged minoura_x68k_bus_h branch.
 1.24  08-Feb-1999  bouyer Change DIOCEJECT to do what's needed to eject a device before the eject
command (unlock for sd and cd) if no other partitions are open, return
EBUSY otherwise. DIOCEJECT will have the old semantic if its argument is not
0. The old ioctl has been renamed to ODIOCEJECT for binary compatibility.
 1.23  22-Aug-1998  minoura branches: 1.23.6;
Eliminated vm_offset_t and vm_size_t.
 1.22  15-Aug-1998  mycroft Assign copyrights to TNF.
 1.21  15-Aug-1998  mycroft Make copyright notices with my name consistent.
 1.20  04-Aug-1998  minoura __BROKEN_INDIRECT_CONFIG fixes.
 1.19  04-Jul-1998  jonathan defopt DDB.
 1.18  30-Jun-1998  msaitoh sync with -current after a long silence
 1.17  24-May-1998  is Back out the defopt for M680?0. As pointed out to me, this breaks ports which
dont use the M680?0 the way Amiga, Atari, Mac68k, and X68k do. I must have
missed this in the past discussion about this project.
 1.16  23-May-1998  is Move M680[2346]0 to opt_m68kcpu.h.
XXX Some explicit dependencies could be removed now from the individual
arch/$ARCH/conf/Makefile.$ARCH files, but this is still to be done.
 1.15  12-Jan-1998  thorpej Update for changes to config.
 1.14  12-Oct-1997  oki Added prototype.
 1.13  10-Oct-1997  oki Fdopen --> fdopen
 1.12  17-Jul-1997  jtk branches: 1.12.2;
use locator defines in "locators.h" to index cf_loc[]
 1.11  02-Apr-1997  oki Add bits[64] declaration
 1.10  05-Feb-1997  oki Use bitmask_snprintf (from i386)
 1.9  31-Jan-1997  thorpej Use new machine-independent mountroothook code.
 1.8  13-Oct-1996  christos backout previous kprintf change
 1.7  11-Oct-1996  christos printf -> kprintf, sprintf -> ksprintf
 1.6  27-Aug-1996  cgd change cfprint_t type definition to take a const char *, rather than
a char *, because that's what was really intended, and because
if the print function modifies the string, various things could become
unhappy (so the string should _not_ be modified).
 1.5  11-Aug-1996  oki drive 2 (or 3) couldn't access with drive 0 (or 1). fixed this.
 1.4  08-Jul-1996  oki move wait for insert system floppy to mountroot_hook stuff
 1.3  05-Jun-1996  oki fixed compiler error at kvtop().
 1.2  21-May-1996  oki branches: 1.2.2;
Some cleanup.
- Add missing return-type of function.
- Add missing prototype.
- some gcc -Wall printf warning.
 1.1  05-May-1996  oki branches: 1.1.1;
Initial revision
 1.1.1.1  05-May-1996  oki NetBSD/x68k, by Masaru Oki.
 1.2.2.3  16-Aug-1996  jtc Pulled up from rev 1.5 by request from oki
 1.2.2.2  08-Jul-1996  jtc Pulled up from rev 1.4 by request from Masaru Oki
 1.2.2.1  05-Jun-1996  oki pull up from the trunk:
>fixed compiler error at kvtop().
 1.12.2.1  14-Oct-1997  thorpej Update marc-pcmcia branch from trunk.
 1.23.6.5  14-Mar-1999  minoura Mis-sync.
 1.23.6.4  14-Mar-1999  minoura Sync.
 1.23.6.3  13-Feb-1999  minoura Use BUS_SPACE_MAP_SHIFTED.
Flush the data cache for the transfer buffer.
Handle INTIOCF_{INTR,DMA,DMAINTR}_DEFAULT cases.
 1.23.6.2  10-Feb-1999  minoura Sync with other ports'(i386,sparc) fd.c.
Use dma_cachectl.
note: still unstable especially on soft err.
 1.23.6.1  02-Feb-1999  minoura fdc at intio.
 1.28.14.1  21-Dec-1999  wrstuden Initial commit of recent changes to make DEV_BSIZE go away.

Runs on i386, needs work on other arch's. Main kernel routines should be
fine, but a number of the stand programs need help.

cd, fd, ccd, wd, and sd have been updated. sd has been tested with non-512
byte block devices. vnd, raidframe, and lfs need work.

Non 2**n block support is automatic for LKM's and conditional for kernels
on "options NON_PO2_BLOCKS".
 1.28.8.1  20-Nov-2000  bouyer Update thorpej_scsipi to -current as of a month ago
A i386 GENERIC kernel compiles without the siop, ahc and bha drivers
(will be updated later). i386 IDE/ATAPI and ncr work, as well as
sparc/esp_sbus. alpha should work as well (untested yet).
siop, ahc and bha will be updated once I've updated the branch to current
-current, as well as machine-dependant code.
 1.35.2.1  21-Jun-2001  nathanw Catch up to -current.
 1.37.8.8  03-Jan-2003  thorpej Sync with HEAD.
 1.37.8.7  11-Nov-2002  nathanw Catch up to -current
 1.37.8.6  18-Oct-2002  nathanw Catch up to -current.
 1.37.8.5  17-Sep-2002  nathanw Catch up to -current.
 1.37.8.4  13-Aug-2002  nathanw Catch up to -current.
 1.37.8.3  01-Aug-2002  nathanw Catch up to -current.
 1.37.8.2  08-Jan-2002  nathanw Catch up to -current.
 1.37.8.1  08-Jul-2001  nathanw file fd.c was added on branch nathanw_sa on 2002-01-08 00:28:38 +0000
 1.37.4.1  10-Oct-2001  fvdl Convert all remaining devices.
 1.37.2.3  10-Oct-2002  jdolecek sync kqueue with -current; this includes merge of gehenna-devsw branch,
merge of i386 MP branch, and part of autoconf rototil work
 1.37.2.2  06-Sep-2002  jdolecek sync kqueue branch with HEAD
 1.37.2.1  10-Jan-2002  thorpej Sync kqueue branch with -current.
 1.40.8.2  31-Aug-2002  gehenna catch up with -current.
 1.40.8.1  17-May-2002  gehenna Add device switch.
 1.56.2.7  10-Nov-2005  skrll Sync with HEAD. Here we go again...
 1.56.2.6  04-Feb-2005  skrll Adapt to branch.
 1.56.2.5  24-Jan-2005  skrll Sync with HEAD.
 1.56.2.4  02-Nov-2004  skrll Sync with HEAD.
 1.56.2.3  21-Sep-2004  skrll Fix the sync with head I botched.
 1.56.2.2  18-Sep-2004  skrll Sync with HEAD.
 1.56.2.1  03-Aug-2004  skrll Sync with HEAD
 1.62.4.1  29-Apr-2005  kent sync with -current
 1.64.2.3  27-Oct-2007  yamt sync with head.
 1.64.2.2  03-Sep-2007  yamt sync with head.
 1.64.2.1  21-Jun-2006  yamt sync with head.
 1.67.6.1  22-Apr-2006  simonb Sync with head.
 1.67.4.1  09-Sep-2006  rpaulo sync with head
 1.67.2.1  01-Mar-2006  yamt sync with head.
 1.68.6.2  24-May-2006  tron Merge 2006-05-24 NetBSD-current into the "peter-altq" branch.
 1.68.6.1  31-Mar-2006  tron Merge 2006-03-31 NetBSD-current into the "peter-altq" branch.
 1.68.4.1  19-Apr-2006  elad sync with head - hopefully this will work
 1.68.2.2  24-May-2006  yamt sync with head.
 1.68.2.1  01-Apr-2006  yamt sync with head.
 1.70.14.2  17-May-2007  yamt sync with head.
 1.70.14.1  12-Mar-2007  rmind Sync with HEAD.
 1.72.2.5  20-Aug-2007  ad - Alter disk attach/detach to fix a panic when closing a vnd device.
- Sync with HEAD.
 1.72.2.4  19-Aug-2007  ad - Back out the biodone() changes.
- Eliminate B_ERROR (from HEAD).
 1.72.2.3  15-Jul-2007  ad Sync with head.
 1.72.2.2  27-May-2007  ad Sync with head.
 1.72.2.1  13-Mar-2007  ad Sync with head.
 1.73.8.3  16-Oct-2007  garbled Sync with HEAD
 1.73.8.2  03-Oct-2007  garbled Sync with HEAD
 1.73.8.1  22-May-2007  matt Update to HEAD.
 1.73.2.1  11-Jul-2007  mjf Sync with head.
 1.76.4.1  15-Aug-2007  skrll Sync with HEAD.
 1.76.2.1  07-Aug-2007  matt Sync with HEAD.
 1.77.8.1  14-Oct-2007  yamt sync with head.
 1.77.6.1  06-Nov-2007  matt sync with HEAD
 1.77.4.1  26-Oct-2007  joerg Sync with HEAD.

Follow the merge of pmap.c on i386 and amd64 and move
pmap_init_tmp_pgtbl into arch/x86/x86/pmap.c. Modify the ACPI wakeup
code to restore CR4 before jumping back into kernel space as the large
page option might cover that.
 1.79.20.3  11-Aug-2010  yamt sync with head.
 1.79.20.2  04-May-2009  yamt sync with head.
 1.79.20.1  16-May-2008  yamt sync with head.
 1.79.18.2  17-Jun-2008  yamt sync with head.
 1.79.18.1  18-May-2008  yamt sync with head.
 1.79.16.4  17-Jan-2009  mjf Sync with HEAD.
 1.79.16.3  02-Jul-2008  mjf Sync with HEAD.
 1.79.16.2  29-Jun-2008  mjf Sync with HEAD.
 1.79.16.1  02-Jun-2008  mjf Sync with HEAD.
 1.80.4.3  03-Jul-2008  simonb Sync with head.
 1.80.4.2  27-Jun-2008  simonb Sync with head.
 1.80.4.1  18-Jun-2008  simonb Sync with head.
 1.80.2.2  18-Sep-2008  wrstuden Sync with wrstuden-revivesa-base-2.
 1.80.2.1  23-Jun-2008  wrstuden Sync w/ -current. 34 merge conflicts to follow.
 1.85.6.1  20-May-2011  bouyer Pull up following revision(s) (requested by tsutsui in ticket #1617):
sys/arch/x68k/dev/fd.c: revision 1.94 via patch
Fix hangup on the first floppy access since 2008.
Problem was reported by isaki@.
On X680x0 (and most other machines other than ISA FDC),
the ready line from FDD is connected to FDC and fdc driver can
be notified of the ready state after fd_set_motor() by interrupts.
In this case no need to use callout(9) to wait the FDD motor stabilized,
and the callout(9) method used in ISA fdc(4) driver rather caused
infinite unhandled interrupts since callout(9) was no longer invoked
during interrupt storm after vmlocking2 merge, I guess.
Should be pulled up to netbsd-5.
 1.85.4.1  19-Jan-2009  skrll Sync with HEAD.
 1.85.2.1  13-Dec-2008  haad Update haad-dm branch to haad-dm-base2.
 1.92.6.2  21-Apr-2011  rmind sync with head
 1.92.6.1  03-Jul-2010  rmind sync with head
 1.92.4.1  17-Aug-2010  uebayasi Sync with HEAD.
 1.93.2.1  06-Jun-2011  jruoho Sync with HEAD.
 1.94.4.4  22-May-2014  yamt sync with head.

for a reference, the tree before this commit was tagged
as yamt-pagecache-tag8.

this commit was splitted into small chunks to avoid
a limitation of cvs. ("Protocol error: too many arguments")
 1.94.4.3  30-Oct-2012  yamt sync with head
 1.94.4.2  23-May-2012  yamt sync with head.
 1.94.4.1  17-Apr-2012  yamt sync with head
 1.95.2.2  02-Jun-2012  mrg sync to latest -current.
 1.95.2.1  18-Feb-2012  mrg merge to -current.
 1.96.2.2  18-Nov-2012  riz Pull up following revision(s) (requested by tsutsui in ticket #646):
sys/arch/x68k/dev/intio_dmac.c: revision 1.34
sys/arch/x68k/dev/fd.c: revision 1.100
sys/arch/x68k/dev/fd.c: revision 1.101
sys/arch/x68k/dev/fd.c: revision 1.102
sys/arch/x68k/dev/fd.c: revision 1.103
sys/arch/x68k/dev/fd.c: revision 1.104
sys/arch/x68k/dev/fd.c: revision 1.105
sys/arch/x68k/dev/fd.c: revision 1.98
sys/arch/x68k/dev/fd.c: revision 1.99
sys/arch/x68k/dev/fdreg.h: revision 1.5
sys/arch/x68k/dev/fdreg.h: revision 1.6
Explicitly specify a proper FDC data register address for HD63450 DMAC
to avoid confusion.
Previous one (fdc->sc_addr + fddata) wasn't a right address for
the FDC's data register but one for the command register by accident,
but FDC ignores A0 address input (connected to A1 of x68k address bus)
during DMA xfer (i.e. when DACK is asserted) so it happened to work
as expected on the real X680x0 hardware, but caused trouble on emulators.
The inconsistency was found by Y.Sugahara during debugging XM6i emulator
(and it will be fixed in the next release).
FDC behavior during DMA is confirmed by uPD72068 hardware application note.
XXX: There is no proper MI API to specify DMA address for DMA controller
(like MC68450) to access devices mapped to memory space by bus_space(9).
- use <sys/bus.h> rather than <machine/bus.h>
- no need to include uvm_extern.h
- include "ioconf.h" for struct cfdriver foo_cd
KNF and cosmetics. No binary change.
- check bus_space_map(9) return value
- use BUS_SPACE_MAP_SHIFTED_ODD for clarify
- define and use proper macro instead of magic
To abort DMA in dmac_abort_xfer(), set DMAC_CCR_SAB (software abort)
rather than DMAC_CCR_HLT (halt operation).
DMAC_CCR_HLT doesn't abort DMA xfers but only suspends DMA ops
(i.e. clearing HLT bit will resume DMA xfers), so previously
DMAC error always occurs on the next DMA xfer ops after
dmac_abort_xfer() is called.
Also suppress DMAC error messages in dmac_error() if it's caused
by software abort command because it can happen during normal
audio play/record DMA ops in vs(4) driver.
Before probing floppy drives, call NE7CMD_SENSEI and fdcresult()
to drain possible pending FDC interrupts. Taken from sys/dev/isa/fd.c.
Hopefully might fix occasional fd drive probe failure (but not confirmed).
Terminate DMAC and call bus_dmamap_unload(9) properly in all FDC xfer
error paths, as sys/dev/isa/fd.c does. Fixes unexpected DMAC errors
(and possible VM panic due to un-unloaded dmamap) on the first floppy
access after read/write errors.
Add floppy format support. Mostly taken from sys/dev/isa/fd.c.
Tested both fdNa (1232KB, 1024bytes/sector, 8sectors/track) and
fdNc (1200KB, 512bytes/sector, 15sectors/track) format on X68030
using fdformat(1).
Finally we can prepare NetBSD/x68k install floppies without Human68k
(except actual initial bootstrap).
KNF and space nits
 1.96.2.1  09-May-2012  riz Pull up following revision(s) (requested by tsutsui in ticket #236):
sys/arch/x68k/x68k/machdep.c: revision 1.182
sys/arch/x68k/dev/fd.c: revision 1.97
Make x68k's floppy driver actually work with proper bounce buffer xfer ops
on machines with extended high memories:
- dev/fd.c:
- add missing bus_dmamap_sync(9) POSTREAD/POSTWRITE ops
- x68k/machdep.c:
- update avail_end variable (which is used to check DMA'able memory range
in intio.c) properly per probed extended memory regions
The problem was found during debugging XM6i's FDC emulation by
Y.Sugahara, isaki@, and me.
Should be pulled up to netbsd-6.
 1.101.2.4  03-Dec-2017  jdolecek update from HEAD
 1.101.2.3  20-Aug-2014  tls Rebase to HEAD as of a few days ago.
 1.101.2.2  23-Jun-2013  tls resync from head
 1.101.2.1  20-Nov-2012  tls Resync to 2012-11-19 00:00:00 UTC
 1.106.2.1  18-May-2014  rmind sync with head
 1.108.2.2  10-Aug-2014  tls Rebase.
 1.108.2.1  07-Apr-2014  tls Be a little more clear and consistent about harvesting entropy from devices:

1) deprecate RND_FLAG_NO_ESTIMATE

2) define RND_FLAG_COLLECT_TIME, RND_FLAG_COLLECT_VALUE

3) define RND_FLAG_ESTIMATE_TIME, RND_FLAG_ESTIMATE_VALUE

4) define RND_FLAG_DEFAULT: RND_FLAG_COLLECT_TIME|
RND_FLAG_COLLECT_VALUE|RND_FLAG_ESTIMATE_TIME

5) Make entropy harvesting from environmental sensors a little more generic
and remove it from individual sensor drivers.

6) Remove individual open-coded delta-estimators for values from a few
places in the tree (uvm, environmental drivers).

7) 0 -> RND_FLAG_DEFAULT, actually gather entropy from various drivers
that had stubbed out code, other minor cleanups.
 1.111.4.5  28-Aug-2017  skrll Sync with HEAD
 1.111.4.4  05-Feb-2017  skrll Sync with HEAD
 1.111.4.3  22-Sep-2015  skrll Sync with HEAD
 1.111.4.2  06-Jun-2015  skrll Sync with HEAD
 1.111.4.1  06-Apr-2015  skrll Sync with HEAD
 1.118.2.1  20-Mar-2017  pgoyette Sync with HEAD
 1.119.8.1  23-Sep-2017  snj Pull up following revision(s) (requested by isaki in ticket #290):
sys/arch/x68k/dev/dmacvar.h: revision 1.11-1.12 via patch
sys/arch/x68k/dev/intio_dmac.c: revision 1.36-1.37 via patch
sys/arch/x68k/dev/fd.c: revision 1.120 via patch
sys/arch/x68k/dev/vs.c: revision 1.45-1.46 via patch
Use dmac_prepare_xfer().
From Y.Sugahara.
--
Allow dmac_alloc_channel() to specify DCR and OCR.
FDC uses 'Cycle Steal Mode with Hold' but ADPCM
should use 'Cycle Steal Mode without Hold' on x68k.
From Y.Suhagara and it was found by XM6i.
--
Fix a Continue Operation.
Patch from Y.Sugahara.
 1.120.4.2  13-Apr-2020  martin Mostly merge changes from HEAD upto 20200411
 1.120.4.1  10-Jun-2019  christos Sync with HEAD
 1.120.2.1  06-Sep-2018  pgoyette Sync with HEAD

Resolve a couple of conflicts (result of the uimin/uimax changes)
 1.123.10.1  21-Mar-2021  thorpej Give config_found() the same variadic arguments treatment as
config_search(). This commit only adds the CFARG_EOL sentinel
to the existing config_found() calls. Conversion of config_found_sm_loc()
and config_found_ia() call sites will be in subsequent commits.
 1.124.8.1  04-Aug-2021  thorpej Adapt to CFARGS().

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