x86/acpi: handle the PCAT_COMPAT flag

1 files changed, 8 insertions, 1 deletions

diff --git a/arch/x86/machine/acpi.c b/arch/x86/machine/acpi.c
index 5927e950..1f7e5683 100644
--- a/arch/x86/machine/acpi.c
+++ b/arch/x86/machine/acpi.c
@@ -31,6 +31,7 @@
 #include <machine/io.h>
 #include <machine/ioapic.h>
 #include <machine/lapic.h>
+#include <machine/pic.h>
 #include <machine/types.h>
 #include <vm/vm_kmem.h>
 
@@ -109,6 +110,8 @@ union acpi_madt_entry {
     struct acpi_madt_entry_ioapic ioapic;
 } __packed;
 
+#define ACPI_MADT_PC_COMPAT 0x1
+
 struct acpi_madt {
     struct acpi_sdth header;
     uint32_t lapic_addr;
@@ -494,11 +497,11 @@ acpi_load_madt(void)
     table = acpi_lookup_table("APIC");
     assert(table != NULL);
     madt = structof(table, struct acpi_madt, header);
+
     lapic_setup(madt->lapic_addr);
     is_bsp = 1;
 
     /*
-     * TODO Handle PCAT_COMPAT flag
      * TODO Handle interrupt overrides
      */
 
@@ -511,6 +514,10 @@ acpi_load_madt(void)
             acpi_load_ioapic(&iter.entry->ioapic);
         }
     }
+
+    if (madt->flags & ACPI_MADT_PC_COMPAT) {
+        pic_setup_disabled();
+    }
 }
 
 int __init