A hack was required for the loapic code due to the address
range not being in DTS. A bug was filed.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
If IO APIC is in logical destination mode, local APICs compare their
logical APIC ID defined in LDR (Logical Destination Register) with
the destination code sent with the interrupt to determine whether or not
to accept the incoming interrupt.
This patch programs LDR in xAPIC mode to support IO APIC logical mode.
The local APIC ID from local APIC ID register can't be used as the
'logical APIC ID' because LAPIC ID may not be consecutive numbers hence
it makes it impossible for LDR to encode 8 IDs within 8 bits.
This patch chooses 0 for BSP, and for APs, cpu_number which is the index
to x86_cpuboot[], which ultimately assigned in z_smp_init[].
Signed-off-by: Zide Chen <zide.chen@intel.com>
If IO APIC is in logical destination mode, local APICs compare their
logical APIC ID defined in LDR (Logical Destination Register) with
the destination code sent with the interrupt to determine whether or not
to accept the incoming interrupt.
This patch programs LDR in xAPIC mode to support IO APIC logical mode.
The local APIC ID from local APIC ID register can't be used as the
'logical APIC ID' because LAPIC ID may not be consecutive numbers hence
it makes it impossible for LDR to encode 8 IDs within 8 bits.
This patch chooses 0 for BSP, and for APs, cpu_number which is the index
to x86_cpuboot[], which ultimately assigned in z_smp_init[].
Signed-off-by: Zide Chen <zide.chen@intel.com>
Pattern being <domain>_<model>.<c/h>.
Here interrupt_controller as a domain would be far too long so
shortening it to "intc", as DTS does actually.
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
2019-12-18 21:49:46 +01:00
Renamed from drivers/interrupt_controller/loapic_intr.c (Browse further)
