1 files changed, 30 insertions, 0 deletions

diff --git a/arch/mips/bcm63xx/early_printk.c b/arch/mips/bcm63xx/early_printk.c
new file mode 100644
index 000000000000..bf353c937df2
--- /dev/null
+++ b/arch/mips/bcm63xx/early_printk.c
@@ -0,0 +1,30 @@
+/*
+ * 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) 2008 Maxime Bizon <mbizon@freebox.fr>
+ */
+
+#include <linux/init.h>
+#include <bcm63xx_io.h>
+#include <bcm63xx_regs.h>
+
+static void __init wait_xfered(void)
+{
+        unsigned int val;
+
+        /* wait for any previous char to be transmitted */
+        do {
+                val = bcm_uart0_readl(UART_IR_REG);
+                if (val & UART_IR_STAT(UART_IR_TXEMPTY))
+                        break;
+        } while (1);
+}
+
+void __init prom_putchar(char c)
+{
+        wait_xfered();
+        bcm_uart0_writel(c, UART_FIFO_REG);
+        wait_xfered();
+}