Kernel: Change the Spurious Interrupt Handler offset in the APIC

The Spurious Interrupt Handler number that is written to APIC_REG_SIV is correct now.
Author: https://github.com/supercomputer7 Commit: https://github.com/SerenityOS/serenity/commit/7c859efa85f Pull-request: https://github.com/SerenityOS/serenity/pull/1361 Reviewed-by: https://github.com/awesomekling
2020-03-06 15:51:32 +02:00 · 2020-03-06 15:51:32 +02:00 · 7c859efa85 · 2024-07-19 08:09:39 +09:00
commit 7c859efa85
parent f7b207c7ae
1 changed files with 2 additions and 1 deletions
--- a/Kernel/Interrupts/APIC.cpp
+++ b/Kernel/Interrupts/APIC.cpp
@ -159,6 +159,7 @@ void eoi()

 bool init()
 {
+    // FIXME: Use the ACPI MADT table
    if (!MSR::have())
        return false;

@ -189,7 +190,7 @@ void enable(u32 cpu)
    // dummy read, apparently to avoid a bug in old CPUs.
    read_register(APIC_REG_SIV);
    // set spurious interrupt vector
-    write_register(APIC_REG_SIV, IRQ_APIC_SPURIOUS | 0x100);
+    write_register(APIC_REG_SIV, (IRQ_APIC_SPURIOUS + IRQ_VECTOR_BASE) | 0x100);

    // local destination mode (flat mode)
    write_register(APIC_REG_DF, 0xf0000000);