Implement preliminary thread context

Three new modules are added :
 - kern/task: Tasks are thread groups and resource containers for their
   threads.
 - kern/thread: The well known scheduling unit.
 - x86/tcb: The architecture specific thread control block.

The kernel currently loads a single thread context on the main processor.

1 files changed, 27 insertions, 3 deletions

diff --git a/kern/kernel.c b/kern/kernel.c
index 52217876..7c83d8d1 100644
--- a/kern/kernel.c
+++ b/kern/kernel.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2011 Richard Braun.
+ * Copyright (c) 2011, 2012 Richard Braun.
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -17,15 +17,39 @@
 
 #include <kern/init.h>
 #include <kern/kernel.h>
+#include <kern/panic.h>
+#include <kern/task.h>
+#include <kern/thread.h>
 #include <machine/cpu.h>
 
-void __init
-kernel_main(void)
+static void __init
+kernel_setup(void *arg)
 {
+    (void)arg;
+
+    cpu_mp_setup();
+
     cpu_intr_enable();
 
     for (;;)
         cpu_idle();
+}
+
+void __init
+kernel_main(void)
+{
+    struct thread *thread;
+    int error;
+
+    task_setup();
+    thread_setup();
+
+    error = thread_create(&thread, "core", kernel_task, kernel_setup, NULL);
+
+    if (error)
+        panic("kernel: unable to create kernel thread");
+
+    thread_load(thread);
 
     /* Never reached */
 }