From a57c228935fd55c4a1cf7c0b7823537c81914000 Mon Sep 17 00:00:00 2001
From: Ralf Baechle <ralf@linux-mips.org>
Date: Sun, 4 Nov 2007 04:49:44 +0000
Subject: [MIPS] Qemu: Add early printk, your friend in a cold night.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---
 arch/mips/qemu/q-console.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 arch/mips/qemu/q-console.c

(limited to 'arch/mips/qemu/q-console.c')

diff --git a/arch/mips/qemu/q-console.c b/arch/mips/qemu/q-console.c
new file mode 100644
index 000000000000..81101ae5017a
--- /dev/null
+++ b/arch/mips/qemu/q-console.c
@@ -0,0 +1,26 @@
+#include <linux/console.h>
+#include <linux/init.h>
+#include <linux/serial_reg.h>
+#include <asm/io.h>
+
+#define PORT(offset) (0x3f8 + (offset))
+
+static inline unsigned int serial_in(int offset)
+{
+	return inb(PORT(offset));
+}
+
+static inline void serial_out(int offset, int value)
+{
+	outb(value, PORT(offset));
+}
+
+int prom_putchar(char c)
+{
+	while ((serial_in(UART_LSR) & UART_LSR_THRE) == 0)
+		;
+
+	serial_out(UART_TX, c);
+
+	return 1;
+}
-- 
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