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.

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

* 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). T

* 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.

show more ...

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 t

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.

show more ...

Use __FBSDID().

Convert hit and miss counters to unsigned values. Surely negative values
for either does not make sense.

PR: (one small part of) 19720

Convert more malloc+bzero to malloc+M_ZERO.

Submitted by: josh@zipperup.org
Submitted by: Robert Drehmel <robd@gmx.net>

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.

* 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.

* 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 dispa

* 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.

show more ...

Update the projects tree to a newer FreeBSD current.

Use NULL in preference to 0 in pointer contexts.

MFH @ 186335

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 inter

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

show more ...

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.

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

* 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). T

* 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.

show more ...

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 t

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.

show more ...

Use __FBSDID().

Convert hit and miss counters to unsigned values. Surely negative values
for either does not make sense.

PR: (one small part of) 19720

Convert more malloc+bzero to malloc+M_ZERO.

Submitted by: josh@zipperup.org
Submitted by: Robert Drehmel <robd@gmx.net>

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.

* 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.

* 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 dispa

* 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.

show more ...