2. Note that ct device uses ctau name as driver name (due to name conflict
with ct driver) and also mark it as a driver inside the CVS tree.
MFC after: 10 days
segment, remove the groping around in the Option ROM segments, remove the
bogus tests for bcopy vs. copyout. There really is no reason for a
management app to know these things other than to create l33t info tables
for the user.
a significant functional change, but it further cleans up the code and
brings it closer to being portable. Thanks to Don Bowman for helping to
test this.
and type for printing info about the device that didn't probe from child, not
parent.
This fixes a panic on systems where not yet supported devices hang off of the
nexus, e.g. on E450.
Reported by: joerg
host-PCI bridge device and find a valid $PIR.
- Make pci_pir_parse() private to pci_pir.c and have pir0's attach routine
call it instead of having legacy_pcib_attach() call it.
- Implement suspend/resume support for the $PIR by giving pir0 a resume
method that calls the BIOS to reroute each link that was already routed
before the machine was suspended.
- Dump the state of the routed flag in the links display code.
- If a link's IRQ is set by a tunable, then force that link to be re-routed
the first time it is used.
- Move the 'Found $PIR' message under bootverbose as the pir0 description
line lists the number of entries already. The pir0 line also only shows
up if we are actually using the $PIR which is a bonus.
- Use BUS_CONFIG_INTR() to ensure that any IRQs used by a PCI link are
set to level/low trigger/polarity.
active low polarity when using the PIC interrupt model. This should fix
broken SCI interrupts on machines when not using the APIC where the BIOS
doesn't program the ELCR to level trigger for the ACPI SCI.
Requested by: njl
polarity for a specified IRQ. The intr_config_intr() function wraps
this pic method hiding the IRQ to interrupt source lookup.
- Add a config_intr() method to the atpic(4) driver that reconfigures
the interrupt using the ELCR if possible and returns an error otherwise.
- Add a config_intr() method to the apic(4) driver that just logs any
requests that would change the existing programming under bootverbose.
Currently, the only changes the apic(4) driver receives are due to bugs
in the acpi(4) driver and its handling of link devices, hence the reason
for such requests currently being ignored.
- Have the nexus(4) driver on i386 implement the bus_config_intr() function
by calling intr_config_intr().
and intr_polarity enums for passing around interrupt trigger modes and
polarity rather than using the magic numbers 0 for level/low and 1 for
edge/high.
- Convert the mptable parsing code to use the new ELCR wrapper code rather
than reading the ELCR directly. Also, use the ELCR settings to control
both the trigger and polarity of EISA IRQs instead of just the trigger
mode.
- Rework the MADT's handling of the ACPI SCI again:
- If no override entry for the SCI exists at all, use level/low trigger
instead of the default edge/high used for ISA IRQs.
- For the ACPI SCI, use level/low values for conforming trigger and
polarity rather than the edge/high values we use for all other ISA
IRQs.
- Rework the tunables available to override the MADT. The
hw.acpi.force_sci_lo tunable is no longer supported. Instead, there
are now two tunables that can independently override the trigger mode
and/or polarity of the SCI. The hw.acpi.sci.trigger tunable can be
set to either "edge" or "level", and the hw.acpi.sci.polarity tunable
can be set to either "high" or "low". To simulate hw.acpi.force_sci_lo,
set hw.acpi.sci.trigger to "level" and hw.acpi.sci.polarity to "low".
If you are having problems with ACPI either causing an interrupt storm
or not working at all (e.g., the power button doesn't turn invoke a
shutdown -p now), you can try tweaking these two tunables to find the
combination that works.
IRQ is edge triggered or level triggered. For ISA interrupts, we assume
that edge triggered interrupts are always active high and that level
triggered interrupts are always active low.
- Don't disable an edge triggered interrupt in the PIC. This avoids
outb instructions to the actual PIC for traditional ISA IRQs such as
IRQ 1, 6, 14, and 15. (Fast interrupts such as IRQs 0 and 8 don't mask
their source, so this doesn't change anything for them.)
- For MCA systems we assume that all interrupts are level triggered and
thus need masking. Otherwise, we probe the ELCR. If it exists we trust
what it tells us regarding which interrupts are level triggered. If it
does not exist, we assume that IRQs 0, 1, 2, and 8 are edge triggered
and that all other IRQs are level triggered and need masking.
- Instruct the ELCR mini-driver to restore its saved state during resume.
register controlled the trigger mode and polarity of EISA interrupts.
However, it appears that most (all?) PCI systems use the ELCR to manage
the trigger mode and polarity of ISA interrupts as well since ISA IRQs used
to route PCI interrupts need to be level triggered with active low
polarity. We check to see if the ELCR exists by sanity checking the value
we get back ensuring that IRQS 0 (8254), 1 (atkbd), 2 (the link from the
slave PIC), and 8 (RTC) are all clear indicating edge trigger and active
high polarity.
This mini-driver will be used by the atpic driver to manage the trigger and
polarity of ISA IRQs. Also, the mptable parsing code will use this mini
driver rather than examining the ELCR directly.
systems. The fts.h here is an exact copy of include/fts.h (except for
an initial explanatory comment and the revision tags, of course). The
fts.c here is slightly modified from lib/libc/gen/fts.c so it can
compile correctly on non-FreeBSD systems.
violate POLA a little less by not requiring exactly two spaces in front
of the entry (and silently discarding any non-matching entry). We now
recognize anything starting with a letter followed by a colon as the
first non-space chars as a partition entry.
depending on namespace pollution in <sys/stat.h>. struct bintime is
only needed to satisfy leakage of kernel interfaces to userland and
namespace bugs in those interfaces...
not as a pending interrupt status, but as a matter of status quo.
Consequently, when there's no data to be transmitted the condition
is not cleared and uart_intr() is stuck in an infinite loop trying
to clear the UART_IPEND_TXIDLE status.
The z8530_bus_ipend() function is changed to return idle only once
after having sent any data.
The root cause for this problem is that we cannot use the interrupt
status bits of the SCC itself. The register that holds the interrupt
status can only be accessed by channel A and holds the status for
both channels. Using the interrupt status register would complicate
the driver because we need to synchronize access to the SCC between
the channels.
Elementary testing: marius
