| # Copyright (c) 2019 Intel Corporation |
| # SPDX-License-Identifier: Apache-2.0 |
| |
| menuconfig LOAPIC |
| bool "LOAPIC" |
| depends on X86 |
| help |
| This option selects local APIC as the interrupt controller. |
| |
| if LOAPIC |
| |
| config LOAPIC_BASE_ADDRESS |
| hex "Local APIC Base Address" |
| default 0xFEE00000 |
| help |
| This option specifies the base address of the Local APIC device. |
| |
| config X2APIC |
| bool "Access local APIC in x2APIC mode" |
| help |
| If your local APIC supports x2APIC mode, turn this on. |
| |
| config LOAPIC_SPURIOUS_VECTOR |
| bool "Handle LOAPIC spurious interrupts" |
| help |
| A special situation may occur when a processor raises its task |
| priority to be greater than or equal to the level of the |
| interrupt for which the processor INTR signal is currently being |
| asserted. If at the time the INTA cycle is issued, the |
| interrupt that was to be dispensed has become masked (programmed |
| by software), the local APIC will deliver a spurious-interrupt |
| vector. Dispensing the spurious-interrupt vector does not affect |
| the ISR, so the handler for this vector should return without an EOI. |
| From x86 manual Volume 3 Section 10.9. |
| |
| config LOAPIC_SPURIOUS_VECTOR_ID |
| int "LOAPIC spurious vector ID" |
| default -1 |
| depends on LOAPIC_SPURIOUS_VECTOR |
| help |
| IDT vector to use for spurious LOAPIC interrupts. Note that some |
| arches (P6, Pentium) ignore the low 4 bits and fix them at 0xF. |
| If this value is left at -1 the last entry in the IDT will be used. |
| |
| config IOAPIC |
| bool "IO-APIC" |
| default y |
| help |
| This option signifies that the target has an IO-APIC device. This |
| capability allows IO-APIC-dependent code to be included. |
| |
| config IOAPIC_MASK_RTE |
| bool "Mask out RTE entries on boot" |
| default y |
| depends on IOAPIC |
| help |
| At boot, mask all IOAPIC RTEs if they may be in an undefined state. |
| You don't need this if the RTEs are either all guaranteed to be masked |
| when the OS starts up, or a previous boot stage has done some IOAPIC |
| configuration that needs to be preserved. |
| |
| endif # LOAPIC |
