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* Use NULL in preference to 0 in pointer contexts.imp2009-02-031-6/+6
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* Modularize the Open Firmware client interface to allow run-time switchingnwhitehorn2008-12-201-25/+34
| | | | | | | | | | | | 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
* Increment kobj_lookup_misses on a miss rather than decrementing it.jhb2005-12-291-1/+1
| | | | | Otherwise, the miss count is actually -kobj_lookup_misses. Mostly a pedantic change as KOBJ_STATS isn't on by default.
* Export a routine, kobj_machdep_init(), that allows platformsgrehan2005-08-071-2/+11
| | | | | | | 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
* * Add multiple inheritance to kobj. Each class can have zero or more basedfr2003-10-161-33/+155
| | | | | | | | | | | | | | | | | | | | | | | | 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.
* add a read-only sysctl to display the number of entries in the fixed sizecg2003-08-141-5/+9
| | | | | | | | | 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.
* Use __FBSDID().obrien2003-06-111-2/+3
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* Convert hit and miss counters to unsigned values. Surely negative valueskbyanc2002-06-101-4/+4
| | | | | | for either does not make sense. PR: (one small part of) 19720
* Convert more malloc+bzero to malloc+M_ZERO.dwmalone2000-12-081-2/+1
| | | | | Submitted by: josh@zipperup.org Submitted by: Robert Drehmel <robd@gmx.net>
* Add kobj_class_compile_static() to allow classes to be initialiseddfr2000-08-281-7/+27
| | | | | statically (i.e. without calling malloc). This allows kobj to be used very early in the boot sequence.
* * Move the driver_t::refs field to kobj_t to replace kobj_t::instances.dfr2000-05-011-3/+3
| | | | | * Back out a couple of workarounds for the confusion between kobj_t::instances and driver_t::refs.
* * Factor out the object system from new-bus so that it can be used bydfr2000-04-081-0/+197
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.
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