Handout

kernel/main.cc

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+
+#include "./arch/lapic.h"
+#include "./debug/copystream.h"
+#include "./debug/output.h"
+#include "./device/serialstream.h"
+#include "./types.h"  // This is actually used
+#include "arch/core_interrupt.h"
+SerialStream sout;
+
+#include "./device/textstream.h"
+
+// Separate title window on first line (for simplicity at scrolling)
+static TextStream tout(0, CGA::COLUMNS, 0, 1);
+
+TextStream dout(0, 80, 17, 25);
+CopyStream copystream(&dout, &sout);
+OutputStream* copyout = &copystream;
+
+#include "./arch/core.h"
+#include "./arch/ioapic.h"
+#include "./device/ps2controller.h"
+#include "./interrupt/guard.h"
+#include "./sync/semaphore.h"
+#include "./thread/thread.h"
+Semaphore koutsem(1);
+TextStream kout(0, 80, 1, 17, true);
+
+// Applications
+#include "./user/app1/appl.h"
+#include "./user/app2/kappl.h"
+
+static const uint32_t NUM_APPS = 9;
+Application apps[NUM_APPS];
+
+static KeyboardApplication kapp;
+
+// Main function
+extern "C" int main() {
+	tout.reset();
+	tout.setPos(33, 0);
+	tout << OS_NAME << " (2.x)" << flush;
+
+	// Initialize IOAPIC
+	IOAPIC::init();
+
+	// Init timer (1000us = 1ms)
+	LAPIC::Timer::setup(10000);
+
+	// Activate Keyboard
+	PS2Controller::init();
+
+	// Enter Level 1/2
+	Guarded g = Guard::enter();
+
+	for (uint32_t i = 0; i < NUM_APPS; ++i) {
+		g.vault().scheduler.ready(&(apps[i]));
+	}
+
+	g.vault().scheduler.ready(&kapp);
+
+	// Enable Interrupts
+	Core::Interrupt::enable();
+
+	/* Activate timer
+	 * Be careful:
+	 * If enabled early and interrupts are enabled, it might start scheduling
+	 * (resume in epilogue) and dispatch the first app, never returning back to
+	 * main and finish initialization.
+	 * Therefore activate the LAPIC timer in level 1/2 after initialization
+	 * (just before schedule())
+	 */
+	LAPIC::Timer::activate();
+
+	DBG_VERBOSE << "Schedule..." << endl;
+	// Schedule first app
+	g.vault().scheduler.schedule();
+
+	return 0;
+}