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kernel: only set level for pins 10 and 11

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This commit is contained in:
K. Lange 2018-12-03 18:28:06 +09:00
parent 90f1f784a1
commit ed87c468e5
1 changed files with 6 additions and 9 deletions
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15
kernel/cpu/irq.c
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@ -148,18 +148,15 @@ void irq_install(void) {
irq_setup_gates();
/**
* This will set a bunch of random pins we stole
* from Haiku to level-triggered mode. If we don't
* do this, we may end up on an EFI system where
* This will set a few pins to "level triggered".
* If we don't do this, we may end up on an EFI system where
* they were set to level triggered in expectation
* of an IO APIC taking over...
*
* We may possibly only need to set the PCI-mapped
* interrupts to level triggered, or even just
* pins 10 and 11 (based on QEMU startup state)?
*/
outportb(0x4D0, 0xF8);
outportb(0x4D1, 0xDE);
#if 0
outportb(0x4D0, 0x00);
#endif
outportb(0x4D1, (1 << (10-8)) | (1 << (11-8)));
}
void irq_ack(size_t irq_no) {