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Only make GSI 0 into an ExtInt and GSIs 1-15 ISA interrupts. When having

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multiple IO-APICs every IO-APIC was initialized to the standard mapping before.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@41434 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Michael Lotz 2011-05-11 09:13:21 +00:00
parent 407af313ca
commit e9d5569740
1 changed files with 6 additions and 5 deletions
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11
src/system/kernel/arch/x86/ioapic.cpp
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@ -319,7 +319,8 @@ ioapic_initialize_ioapic(struct ioapic& ioapic, uint64 targetAPIC)
{
// program the interrupt vectors of the io-apic
ioapic.level_triggered_mask = 0;
for (uint8 i = 0; i <= ioapic.max_redirection_entry; i++) {
uint8 gsi = ioapic.global_interrupt_base;
for (uint8 i = 0; i <= ioapic.max_redirection_entry; i++, gsi++) {
// initialize everything to deliver to the boot CPU in physical mode
// and masked until explicitly enabled through enable_io_interrupt()
uint64 entry = (targetAPIC << IO_APIC_DESTINATION_FIELD_SHIFT)
@ -327,13 +328,13 @@ ioapic_initialize_ioapic(struct ioapic& ioapic, uint64 targetAPIC)
| (IO_APIC_DESTINATION_MODE_PHYSICAL << IO_APIC_DESTINATION_MODE_SHIFT)
| ((i + ARCH_INTERRUPT_BASE) << IO_APIC_INTERRUPT_VECTOR_SHIFT);
if (i == 0) {
// make redirection entry 0 into an external interrupt
if (gsi == 0) {
// make GSI 0 into an external interrupt
entry |= (IO_APIC_TRIGGER_MODE_EDGE << IO_APIC_TRIGGER_MODE_SHIFT)
| (IO_APIC_PIN_POLARITY_HIGH_ACTIVE << IO_APIC_PIN_POLARITY_SHIFT)
| (IO_APIC_DELIVERY_MODE_EXT_INT << IO_APIC_DELIVERY_MODE_SHIFT);
} else if (i < 16) {
// make 1-15 ISA interrupts
} else if (gsi < 16) {
// make GSIs 1-15 ISA interrupts
entry |= (IO_APIC_TRIGGER_MODE_EDGE << IO_APIC_TRIGGER_MODE_SHIFT)
| (IO_APIC_PIN_POLARITY_HIGH_ACTIVE << IO_APIC_PIN_POLARITY_SHIFT)
| (IO_APIC_DELIVERY_MODE_FIXED << IO_APIC_DELIVERY_MODE_SHIFT);