code to permit detaching (and possible module unloading). Also,
convert tsleep()/wakeup() locking to use cv_wait_sig()/cv_broadcast().
Tested in non-modular, modular-builtin, and modular-loaded-at-runtime
environments.
- PCH_LPT (and newer device) is required to check FWSM_WLOCK_MAC bit to
determine the range of the RAL.
- Fix typo in comment and modify comment by tnn@.
- Rename wm_check_reset_block() to wm_phy_resetisblocked() and make it returns
bool. No functional change.
This is a complete, but untested, driver; except that it needs to be able
to configure gpios and, afaict, we don't yet have an fdtbus_gpio_* function
that will do that.
Written but untested. I'm still confused about how to handle two things:
1) at interrupt disestablishment, where do I get an interrupt number so
that I can disable the interrupt on the combiner?
2) How is interrupt multiplexing handled? I don't seem to have any sort of
interrupt dispatch routine that takes the 1 interrupt that reaches the
gic and turn it into one of eight combined interrupts to call the
established interrupt for the original uncombined interrupt source.
(0) softint handler "handler A" is established
(1) CPU#X does softint_schedule() for "handler A"
- the softhand_t is set SOFTINT_PENDING flag
- the softhand_t is NOT set SOFTINT_ACTIVE flag yet
(2) CPU#X begins other H/W interrupt processing
(3) CPU#Y does softint_disestablish() for "handler A"
- waits until softhand_t's SOFTINT_ACTIVE of all CPUs is clear
- the softhand_t is set not SOFTINT_ACTIVE but SOFTINT_PENDING,
so CPU#Y does not wait
- unset the function of "handler A"
(4) CPU#X does softint_execute()
- the function of "handler A" is already clear, so panic
filehandle to a vnode. This can come from nfs and it could be out of range.
In that case we read garbage from the disk, end up trying to free bogus data
when we put the vnode back and we crash.
XXX: pullup-7
