Doesn't do much but provided the detection path for it and ability to
hold initialized state. The higher level platform code is going to need
to use it directly so will mostly just provide an api for access to it.
Moved ACPI sniffing back to just after the VM is initialized instead of
all the way into platform_init(). This should try to ensure that all
drivers that come up afterwards will have ioapics discovered in case
future development tries to enable and use them, kicking the machine out
of virtual-wire-mode.
I have a bulldozer machine here that curiously starts the APIC IDs for
the cpus at 16 and counts up.
This is a problem since the current code assumes that the boot cpu is 0,
and would try to start itself (apic id 16) later because it thought it
was the first secondary. Fix this by re-reading the APIC id on the boot
cpu and patching the percpu structure a bit into boot. Kinda a hack but
avoids having to detect the APIC, find the type of ID to read, etc.
Also means that practically speaking the system is using the full 32bit
APIC IDs if that feature is present, since now the local apic id is
entirely read from the local apic as it should be (if present).
Fixes#475
- Skip cpus in the MADT table that are not enabled
- Bump count to 16 cpus
- Move the spurious interrupt vector to 0xff since it needs to end in
0xf on <=P6.
- Fix an assert in local apic code when not using x2apic and starting
secondaries.
- Follow the spec a bit closer and wait up till a second for each
secondary core to start.
-Move the local apic driver to arch/x86
-Add routines to send IPIs between cpus
Something is unstable at the moment and the system crashes after a while
with random corruptions when using SMP.
