1 files changed, 56 insertions, 0 deletions
diff --git a/arch/m68k/kernel/early_printk.c b/arch/m68k/kernel/early_printk.c
new file mode 100644
index 000000000000..521cbb8a150c
--- /dev/null
+++ b/arch/m68k/kernel/early_printk.c
@@ -0,0 +1,56 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (c) 2014 Finn Thain
+ */
+
+#include <linux/kernel.h>
+#include <linux/console.h>
+#include <linux/init.h>
+#include <linux/string.h>
+#include <asm/setup.h>
+
+
+#include "../mvme147/mvme147.h"
+#include "../mvme16x/mvme16x.h"
+
+asmlinkage void __init debug_cons_nputs(struct console *c, const char *s, unsigned int n);
+
+static struct console early_console_instance = {
+	.name  = "debug",
+	.flags = CON_PRINTBUFFER | CON_BOOT,
+	.index = -1
+};
+
+static int __init setup_early_printk(char *buf)
+{
+	if (early_console || buf)
+		return 0;
+
+	if (MACH_IS_MVME147)
+		early_console_instance.write = mvme147_scc_write;
+	else if (MACH_IS_MVME16x)
+		early_console_instance.write = mvme16x_cons_write;
+	else
+		early_console_instance.write = debug_cons_nputs;
+	early_console = &early_console_instance;
+	register_console(early_console);
+
+	return 0;
+}
+early_param("earlyprintk", setup_early_printk);
+
+static int __init unregister_early_console(void)
+{
+	/*
+	 * debug_cons_nputs() defined in arch/m68k/kernel/head.S cannot be
+	 * called after init sections are discarded (for platforms that use it).
+	 */
+	if (early_console && early_console->write == debug_cons_nputs)
+		return unregister_console(early_console);
+
+	return 0;
+}
+late_initcall(unregister_early_console);