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Support NMI sources. Any non maskable interrupt (NMI) will be marked as

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unavailable for routing so that we don't end up configuring anything on them.
I haven't seen these in actual use though.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@41530 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Michael Lotz 2011-05-16 13:36:31 +00:00
parent 22d72c8ee1
commit 86d59c04c6
1 changed files with 29 additions and 12 deletions
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41
src/system/kernel/arch/x86/ioapic.cpp
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@ -103,6 +103,7 @@ struct ioapic {
uint8 global_interrupt_base;
uint8 global_interrupt_last;
uint64 level_triggered_mask;
uint64 nmi_mask;
area_id register_area;
ioapic_registers* registers;
@ -342,8 +343,10 @@ ioapic_initialize_ioapic(struct ioapic& ioapic, uint8 targetAPIC)
// program the APIC ID
ioapic_write_32(ioapic, IO_APIC_ID, ioapic.apic_id << IO_APIC_ID_SHIFT);
// program the interrupt vectors of the io-apic
ioapic.level_triggered_mask = 0;
ioapic.nmi_mask = 0;
// program the interrupt vectors of the io-apic
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
@ -510,6 +513,25 @@ acpi_configure_source_overrides(acpi_table_madt* madt)
break;
}
case ACPI_MADT_TYPE_NMI_SOURCE:
{
acpi_madt_nmi_source* info
= (acpi_madt_nmi_source*)apicEntry;
dprintf("found nmi source global irq %lu, flags 0x%04x\n",
(uint32)info->GlobalIrq, (uint16)info->IntiFlags);
struct ioapic* ioapic = find_ioapic(info->GlobalIrq);
if (ioapic == NULL) {
dprintf("nmi source for gsi that is not mapped to any "
" io-apic\n");
break;
}
uint8 pin = info->GlobalIrq - ioapic->global_interrupt_base;
ioapic->nmi_mask |= (uint64)1 << pin;
break;
}
#ifdef TRACE_IOAPIC
case ACPI_MADT_TYPE_LOCAL_APIC:
{
@ -521,16 +543,6 @@ acpi_configure_source_overrides(acpi_table_madt* madt)
break;
}
case ACPI_MADT_TYPE_NMI_SOURCE:
{
// TODO: take these into account
acpi_madt_nmi_source* info
= (acpi_madt_nmi_source*)apicEntry;
dprintf("found nmi source global irq %lu, flags 0x%04x\n",
(uint32)info->GlobalIrq, (uint16)info->IntiFlags);
break;
}
case ACPI_MADT_TYPE_LOCAL_APIC_NMI:
{
// TODO: take these into account, but at apic.cpp
@ -589,7 +601,12 @@ acpi_set_interrupt_model(acpi_module_info* acpiModule, uint32 interruptModel)
bool
ioapic_is_interrupt_available(int32 gsi)
{
return find_ioapic(gsi) != NULL;
struct ioapic* ioapic = find_ioapic(gsi);
if (ioapic == NULL)
return false;
uint8 pin = gsi - ioapic->global_interrupt_base;
return (ioapic->nmi_mask & ((uint64)1 << pin)) == 0;
}