Commit Graph

13 Commits

Author SHA1 Message Date
Matthew D Fleming
fbbb13f962 sysctl(9) cleanup checkpoint: amd64 GENERIC builds cleanly.
Commit the kernel changes.
2011-01-12 19:54:19 +00:00
Warner Losh
2c204a1631 Use NULL in preference to 0 in pointer contexts. 2009-02-03 07:54:42 +00:00
Nathan Whitehorn
91416fb268 Modularize the Open Firmware client interface to allow run-time switching
of OFW access semantics, in order to allow future support for real-mode
OF access and flattened device frees. OF client interface modules are
implemented using KOBJ, in a similar way to the PPC PMAP modules.

Because we need Open Firmware to be available before mutexes can be used on
sparc64, changes are also included to allow KOBJ to be used very early in
the boot process by only using the mutex once we know it has been initialized.

Reviewed by:    marius, grehan
2008-12-20 00:33:10 +00:00
John Baldwin
42b6a681bc Increment kobj_lookup_misses on a miss rather than decrementing it.
Otherwise, the miss count is actually -kobj_lookup_misses.  Mostly a
pedantic change as KOBJ_STATS isn't on by default.
2005-12-29 18:00:42 +00:00
Peter Grehan
e000e00118 Export a routine, kobj_machdep_init(), that allows platforms
to use the kobj subsystem as soon at mutex_init() has been called
instead of having to wait for the SI_SUB_LOCK sysinit.

Reviewed by:	dfr
2005-08-07 02:20:35 +00:00
Doug Rabson
46ba7a35f2 * Add multiple inheritance to kobj. Each class can have zero or more base
classes and if a method is not found in a given class, its base classes
  are searched (in the order they were declared). This search is recursive,
  i.e. a method may be define in a base class of a base class.
* Change the kobj method lookup algorithm to one which is SMP-safe. This
  relies only on the constraint that an observer of a sequence of writes
  of pointer-sized values will see exactly one of those values, not a
  mixture of two or more values. This assumption holds for all processors
  which FreeBSD supports.
* Add locking to kobj class initialisation.
* Add a simpler form of 'inheritance' for devclasses. Each devclass can
  have a parent devclass. Searches for drivers continue up the chain of
  devclasses until either a matching driver is found or a devclass is
  reached which has no parent. This can allow, for instance, pci drivers
  to match cardbus devices (assuming that cardbus declares pci as its
  parent devclass).
* Increment __FreeBSD_version.

This preserves the driver API entirely except for one minor feature used
by the ISA compatibility shims. A workaround for ISA compatibility will
be committed separately. The kobj and newbus ABI has changed - all modules
must be recompiled.
2003-10-16 09:16:28 +00:00
Cameron Grant
828447e0ca add a read-only sysctl to display the number of entries in the fixed size
kobj global method table; also kassert that the table has not overflowed
when defining a new method.

there are indications that the table is being overflowed in certain
situations as we gain more kobj consumers- this will allow us to check
whether kobj is at fault.  symptoms would be incorrect methods being called.
2003-08-14 21:16:46 +00:00
David E. O'Brien
677b542ea2 Use __FBSDID(). 2003-06-11 00:56:59 +00:00
Kelly Yancey
3316a80bd1 Convert hit and miss counters to unsigned values. Surely negative values
for either does not make sense.

PR:		(one small part of) 19720
2002-06-10 22:40:26 +00:00
David Malone
7cc0979fd6 Convert more malloc+bzero to malloc+M_ZERO.
Submitted by:	josh@zipperup.org
Submitted by:	Robert Drehmel <robd@gmx.net>
2000-12-08 21:51:06 +00:00
Doug Rabson
f80e454726 Add kobj_class_compile_static() to allow classes to be initialised
statically (i.e. without calling malloc). This allows kobj to be used
very early in the boot sequence.
2000-08-28 21:11:12 +00:00
Doug Rabson
4b4a49fda5 * Move the driver_t::refs field to kobj_t to replace kobj_t::instances.
* Back out a couple of workarounds for the confusion between
  kobj_t::instances and driver_t::refs.
2000-05-01 10:45:15 +00:00
Doug Rabson
f7b7769172 * Factor out the object system from new-bus so that it can be used by
non-device code.
* Re-implement the method dispatch to improve efficiency. The new system
  takes about 40ns for a method dispatch on a 300Mhz PII which is only
  10ns slower than a direct function call on the same hardware.

This changes the new-bus ABI slightly so make sure you re-compile any
driver modules which you use.
2000-04-08 14:17:18 +00:00