1 files changed, 55 insertions, 0 deletions

diff --git a/arch/mips/dec/prom/console.c b/arch/mips/dec/prom/console.c
new file mode 100644
index 000000000000..cade16ec7e5a
--- /dev/null
+++ b/arch/mips/dec/prom/console.c
@@ -0,0 +1,55 @@
+/*
+ *      arch/mips/dec/prom/console.c
+ *
+ *      DECstation PROM-based early console support.
+ *
+ *      Copyright (C) 2004  Maciej W. Rozycki
+ *
+ *      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 the Free Software Foundation; either version
+ *      2 of the License, or (at your option) any later version.
+ */
+#include <linux/console.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+
+#include <asm/dec/prom.h>
+
+static void __init prom_console_write(struct console *con, const char *s,
+                                      unsigned int c)
+{
+        static char sfmt[] __initdata = "%%%us";
+        char fmt[13];
+
+        snprintf(fmt, sizeof(fmt), sfmt, c);
+        prom_printf(fmt, s);
+}
+
+static struct console promcons __initdata = {
+        .name   = "prom",
+        .write  = prom_console_write,
+        .flags  = CON_PRINTBUFFER,
+        .index  = -1,
+};
+
+static int promcons_output __initdata = 0;
+
+void __init register_prom_console(void)
+{
+        if (!promcons_output) {
+                promcons_output = 1;
+                register_console(&promcons);
+        }
+}
+
+void __init unregister_prom_console(void)
+{
+        if (promcons_output) {
+                unregister_console(&promcons);
+                promcons_output = 0;
+        }
+}
+
+void disable_early_printk(void)
+        __attribute__((alias("unregister_prom_console")));