Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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 000000000..31a8441d8
--- /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);
+}