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-rw-r--r--arch/mips/dec/prom/console.c41
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/mips/dec/prom/console.c b/arch/mips/dec/prom/console.c
new file mode 100644
index 0000000000..31a8441d84
--- /dev/null
+++ b/arch/mips/dec/prom/console.c
@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * DECstation PROM-based early console support.
+ *
+ * Copyright (C) 2004, 2007 Maciej W. Rozycki
+ */
+#include <linux/console.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+
+#include <asm/dec/prom.h>
+
+static void __init prom_console_write(struct console *con, const char *s,
+ unsigned int c)
+{
+ char buf[81];
+ unsigned int chunk = sizeof(buf) - 1;
+
+ while (c > 0) {
+ if (chunk > c)
+ chunk = c;
+ memcpy(buf, s, chunk);
+ buf[chunk] = '\0';
+ prom_printf("%s", buf);
+ s += chunk;
+ c -= chunk;
+ }
+}
+
+static struct console promcons __initdata = {
+ .name = "prom",
+ .write = prom_console_write,
+ .flags = CON_BOOT | CON_PRINTBUFFER,
+ .index = -1,
+};
+
+void __init register_prom_console(void)
+{
+ register_console(&promcons);
+}