until all device driver discovery threads have had a chance to do their
work. This in turn blocks initproc's exec of init(8) until root is
mounted and process start times and CWD info has been fixed up.
Addresses kern/9247.
if you com* at pcmcia?, and com3 and com4 as pcmcia cards, and removed
and reinserted the card that was com3, it would become com5. if you then
removed and reinserted com4, it would become com6. etc.) Now, instead
of incrementing FSTATE_STAR configuration entries for a driver when
a cloning instance is attached, leave it alone, and scan the device softc
array (starting at the first cloning unit number) for units which are
available for use. This wastes a tiny bit of time (can require a linear
scan of the softc table for the device), but device attachment should be
relatively infrequent and the number of units of each type of device
is never particularly large anyway.
- Call configure() after setting up proc0.
- Call initclocks() from configure(), after cpu_configure(). Once the
clocks are running, clear `cold'. Then run interrupt-driven
autoconfiguration.
by Ken Hornstein and myself.
Add flags to struct device, and define one as "active". Devices are
initially active from config_attach(). Their active state may be changed
via config_activate() and config_deactivate().
These new functions assume that the device being manipulated will recursively
perform the action on its children.
Together, config_deactivate() and config_detach() may be used to implement
interrupt-driven device detachment. config_deactivate() will take care of
things that need to be performed at interrupt time, and config_detach()
(which must run in a valid thread context) finishes the job, which may
block.
defined:
define match functions to take a struct cfdata * as their second
argument, config_search() to take a struct cfdata * as its second
argument, and config_{root,}search() to return struct cfdata *.
remove 'cd_indirect' cfdriver element.
remove config_scan().
remove config_make_softc() as a seperate function, reintegrating
its functionality into config_attach().
Ports will define __BROKEN_INDIRECT_CONFIG until their drivers prototypes
are updated to work with the new definitions, and until it is sure that
their indirect-config drivers do not assume that they have a softc
in their match routine.
structure and 'aux', right before ca_attach is called for the
newly-attached device. This allows the alpha port to do root device
autodetection without modifying every bus and device driver which could
be in the 'boot path.' In the long run, it may make sense to make
this machine-independent.
return a struct device * of attached device, or NULL if device attach failed,
rather than 1/0 for success/failure, so that code that bus code which needs
to know what the child device is doesn't have to open-code a hacked variant
of config_found(). Make config_attach() return struct device *, rather than
void, to facilitate that.
- split softc size and match/attach out from cfdriver into
a new struct cfattach.
- new "attach" directive for files.*. May specify the name of
the cfattach structure, so that devices may be easily attached
to parents with different autoconfiguration semantics.
argument list. This allows easy 'submatching', which will eliminate a fair
bit of slightly tricky duplicated code from various busses. config_found()
is now a #define in sys/device.h, which invokes config_found_sm().
