about devclass_find_internal
devclass_find_internal will be called to create a new devclass in
such 2 conditions :
one is creating a new device , as : if (name) { dc =
devclass_find_internal(name, 0, TRUE);
another is in the function:devclass_add_driver. but ,if a driver 's
name is different from the name of any deviceclass in the system ,it
just create a new devclass ,and link it self into the parent
busdevice's driver link and do nothing .what is the use of the driver
at this situation?
On 11/4/05, kylin <[EMAIL PROTECTED]> wrote:
hello every one :) good day!
i have list the 3 puzzle coming to me in my recent coding reading of freebsd
0
///////////////
pci bridge dynamic resize
/////////////
it seems that the device arch of freebsd is similar to what is revealed in
window OS. i have read the pcie hotplug tps of windows longhorn ,it is said
that with some hardware mechanisms the pci bridge driver can do global pci
resource window reconfiguration.so good to the hotplugin pci device for it
avoid prelocating resource for the device .
i wonder ,if the mem /io/irq reconfiguration possible under freebsd .:)
1
//////////////
is bus_data_generation
/////////
what idoes bus_data_generation for, is it the generation count for the
device manager tree?
void
bus_data_generation_update(void)
{
bus_data_generation++;
}
2
//////////////
pci_write_config vs pci_write_config_method
//////////////
under the source code /dev/pci .there are functions name pci_write_config
(pcivar.h) and pci_write_config_method(pci.c)
they both call the parent method ,though the content is different ,but does
that a liitle overlap whit each other?
--
we who r about to die,salute u!
--
we who r about to die,salute u!
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