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| /freebsd-11-stable/sys/x86/isa/ | ||
| H A D | atpic.c | diff 153136 Mon Dec 05 20:09:30 MST 2005 jhb Really slam the door on mixed mode now that we don't depend on it for a working IRQ0 with APIC anymore. Previously, it was possible to have some other ATPIC IRQS "leak" through in a few edge cases. For example, on my x86 test machine, ACPI re-routes the SCI (IRQ 9) to intpin 13 on the first I/O APIC. This leaves a hole for IRQ 13 (since the APIC doesn't provide a source for IRQ 13 in that case) with the result that the ATPIC IRQ13 source was registered instead. This changes the 8259A drivers to only register their interrupt sources if none of the 16 ISA IRQs have an interrupt source already installed. MFC after: 1 week |
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