Add an early boot testing module

modules/xtest.c

@@ -0,0 +1,46 @@
+/* vim: tabstop=4 shiftwidth=4 noexpandtab
+ * This file is part of ToaruOS and is released under the terms
+ * of the NCSA / University of Illinois License - see LICENSE.md
+ * Copyright (C) 2014 Kevin Lange
+ */
+#include <system.h>
+#include <module.h>
+#include <printf.h>
+#include <logging.h>
+
+#include <mod/shell.h>
+
+static void xtest_a(void * data, char * name) {
+	fs_node_t * tty = data;
+
+	fprintf(tty, "[%s] Hello world.\n", name);
+
+	while (1) {
+		fprintf(tty, "[%s] Ping.\n", name);
+		unsigned long s, ss;
+		relative_time(1, 0, &s, &ss);
+		sleep_until((process_t *)current_process, s, ss);
+		switch_task(0);
+	}
+}
+
+static int hello(void) {
+	fs_node_t * tty = kopen("/dev/ttyS0", 0);
+
+	fprintf(tty, "[xtest] Starting background thread...\n");
+	create_kernel_tasklet(xtest_a,  "xtest-a", (void *)tty);
+
+	fprintf(tty, "[xtest] Enabling logging directly to serial...\n");
+	debug_file = tty;
+	debug_level = 1;
+
+	return 0;
+}
+
+static int goodbye(void) {
+	return 0;
+}
+
+MODULE_DEF(xtest, hello, goodbye);
+MODULE_DEPENDS(serial);
+