Kernel: Add SMP IPI support

We can now properly initialize all processors without
crashing by sending SMP IPI messages to synchronize memory
between processors.

We now initialize the APs once we have the scheduler running.
This is so that we can process IPI messages from the other
cores.

Also rework interrupt handling a bit so that it's more of a
1:1 mapping. We need to allocate non-sharable interrupts for
IPIs.

This also fixes the occasional hang/crash because all
CPUs now synchronize memory with each other.

1 files changed, 3 insertions, 1 deletions

diff --git a/Kernel/Scheduler.h b/Kernel/Scheduler.h
index 5ffb57d201..4b5588fc93 100644
--- a/Kernel/Scheduler.h
+++ b/Kernel/Scheduler.h
@@ -51,7 +51,9 @@ extern RecursiveSpinLock g_scheduler_lock;
 
 class Scheduler {
 public:
-    static void initialize(u32 cpu);
+    static void initialize();
+    static Thread* create_ap_idle_thread(u32 cpu);
+    static void set_idle_thread(Thread* idle_thread);
     static void timer_tick(const RegisterState&);
     [[noreturn]] static void start();
     static bool pick_next();