1 files changed, 73 insertions, 0 deletions
diff --git a/kernel/include/main/apic.h b/kernel/include/main/apic.h
new file mode 100644
index 0000000..ca9c8f5
--- /dev/null
+++ b/kernel/include/main/apic.h
@@ -0,0 +1,73 @@
+#pragma once
+
+#include "main/interrupt.h"
+#include "types.h"
+
+typedef enum
+{
+    DESTINATION_MODE_FIXED = 0,
+    DESTINATION_MODE_LOWEST_PRIORITY = 1,
+    DESTINATION_MODE_SMI = 2,
+    DESTINATION_MODE_NMI = 4,
+    DESTINATION_MODE_INIT = 5,
+    DESTINATION_MODE_SIPI = 6
+} ipi_destination_mode;
+
+#define MAX_LAPICS 8
+
+/* Initializes the APIC using data from the ACPI tables.
+ * ACPI handlers must be initialized before calling this
+ * function. */
+void apic_init();
+
+/* Returns the APIC ID of the current processor */
+long apic_current_id();
+
+/* Returns the largest known APIC ID */
+long apic_max_id();
+
+/* Maps the given IRQ to the given interrupt number. */
+void apic_setredir(uint32_t irq, uint8_t intr);
+
+void apic_enable();
+
+// timer interrupts arrive at a rate of (freq / 16) interrupts per millisecond
+// (with an )
+/* Starts the APIC timer */
+void apic_enable_periodic_timer(uint32_t freq);
+
+/* Stops the APIC timer */
+void apic_disable_periodic_timer();
+
+/* Sets the interrupt to raise when a spurious
+ * interrupt occurs. */
+void apic_setspur(uint8_t intr);
+
+/* Sets the interrupt priority level. This function should
+ * be accessed via wrappers in the interrupt subsystem. */
+void apic_setipl(uint8_t ipl);
+
+/* Gets the interrupt priority level. This function should
+ * be accessed via wrappers in the interrupt subsystem. */
+uint8_t apic_getipl();
+
+long apic_initialized();
+
+/* Writes to the APIC's memory mapped end-of-interrupt
+ * register to indicate that the handling of an interrupt
+ * originating from the APIC has been finished. This function
+ * should only be called from the interrupt subsystem. */
+void apic_eoi();
+
+void apic_start_processor(uint8_t target, uint8_t execution_page);
+
+void apic_send_ipi(uint8_t target, ipi_destination_mode destination_mode,
+                   uint8_t vector);
+
+void apic_broadcast_ipi(ipi_destination_mode mode, uint8_t vector,
+                        long include_self);
+
+/**
+ * Wait for the last IPI sent to be acknowledged by the target processor.
+ */
+void apic_wait_ipi();
+\ No newline at end of file