ioapic: Properly log interrupt mode

ioapic: Don't assert that interrupt mode are level/low or edge/high

For ACPI SCI, other combinations may be used by brain damaged BIOSes.

8254: Setup interrupt properly for new I/O APIC code

mptable/ioapic: Properly routing PCI interrupts

ioapic/abi: Mark unused ISA IRQs as reserved

ioapic: Let callers of pin_setup() to hold imen_spinlock

ioapic: Move MachIntrABI switching from ABI finalize to I/O APIC configure

lapic: Centralize LAPIC configuration

apic: Centralize IMCR present setting

ioapic/abi: Log interrupt trigger mode changes

It is mainly used to locate missing bus_config_intr call

machintr: Add intr_config interface

This interface is used to change pre-configured interrupt's trigger
mode and polarity.

ioapic: Properly setup I/O APIC pin according to the saved information

ioapic/abi: Save IRQ to GSI mapping

ioapic/abi: Save interrupt polarity

ioapic: During initmap, only GSIs should be configured.

irqmap: Consume the syscall entry in irqmap

ioapic: Pass ioapic address to ioapic_{read,write}()

This makes easier for us to get rid of the ioapic addresses array.

ioapic/icu: Add irqmap

intr: Further delay MachIntrABI.finalize()

It only affects SMP case. For ICU, it will be better if finalize()
is called after IMCR detection is done, though on most modern systems
IMCR does not exi

intr: Further delay MachIntrABI.finalize()

It only affects SMP case. For ICU, it will be better if finalize()
is called after IMCR detection is done, though on most modern systems
IMCR does not exist. For I/O APIC, finalize() _should_ be called
after BSP's LAPIC is initialized, since it alters BSP LAPIC's LINT0
and LINT1 configuration.

Add stabilize() ABI to MachIntrABI which is only implemented by ICU
currently and this ABI is called in the place where finalize() used
to be called.

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ioapic: File renaming (apic -> ioapic)