From 5429211e0acefeecc16a045bbda99be9f1aaaf37 Mon Sep 17 00:00:00 2001
From: Adrian Chadd <adrian@FreeBSD.org>
Date: Wed, 18 Aug 2010 09:11:45 +0000
Subject: [PATCH] Add a DDR flush function, inspired by both Linux and
 if_arge.c.

---
 sys/mips/atheros/ar71xxreg.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/sys/mips/atheros/ar71xxreg.h b/sys/mips/atheros/ar71xxreg.h
index a87151f62429..e6b7b8e8ac53 100644
--- a/sys/mips/atheros/ar71xxreg.h
+++ b/sys/mips/atheros/ar71xxreg.h
@@ -491,5 +491,15 @@ ar71xx_ahb_freq(void)
 	return (freq);
 }
 
+static inline void
+ar71xx_ddr_flush(uint32_t reg)
+{ 
+	ATH_WRITE_REG(reg, 1);
+	while ((ATH_READ_REG(reg) & 0x1))
+		;
+	ATH_WRITE_REG(reg, 1);
+	while ((ATH_READ_REG(reg) & 0x1))
+		;
+} 
 
 #endif /* _AR71XX_REG_H_ */