From: David Daney <ddaney@caviumnetworks.com>
Date: Thu, 11 Dec 2008 23:33:29 +0000 (-0800)
Subject: MIPS: Modify core io.h macros to account for the Octeon Errata Core-301.
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=8faca49a6731299c32b333fd6535db8d21557ce3;p=linux-beck.git

MIPS: Modify core io.h macros to account for the Octeon Errata Core-301.

Signed-off-by: Tomaso Paoletti <tpaoletti@caviumnetworks.com>
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---

diff --git a/arch/mips/include/asm/io.h b/arch/mips/include/asm/io.h
index 501a40b9f18d..436878e4e063 100644
--- a/arch/mips/include/asm/io.h
+++ b/arch/mips/include/asm/io.h
@@ -295,6 +295,12 @@ static inline void iounmap(const volatile void __iomem *addr)
 #undef __IS_KSEG1
 }
 
+#ifdef CONFIG_CPU_CAVIUM_OCTEON
+#define war_octeon_io_reorder_wmb()  		wmb()
+#else
+#define war_octeon_io_reorder_wmb()		do { } while (0)
+#endif
+
 #define __BUILD_MEMORY_SINGLE(pfx, bwlq, type, irq)			\
 									\
 static inline void pfx##write##bwlq(type val,				\
@@ -303,6 +309,8 @@ static inline void pfx##write##bwlq(type val,				\
 	volatile type *__mem;						\
 	type __val;							\
 									\
+	war_octeon_io_reorder_wmb();					\
+									\
 	__mem = (void *)__swizzle_addr_##bwlq((unsigned long)(mem));	\
 									\
 	__val = pfx##ioswab##bwlq(__mem, val);				\
@@ -370,6 +378,8 @@ static inline void pfx##out##bwlq##p(type val, unsigned long port)	\
 	volatile type *__addr;						\
 	type __val;							\
 									\
+	war_octeon_io_reorder_wmb();					\
+									\
 	__addr = (void *)__swizzle_addr_##bwlq(mips_io_port_base + port); \
 									\
 	__val = pfx##ioswab##bwlq(__addr, val);				\
@@ -504,8 +514,12 @@ BUILDSTRING(q, u64)
 #endif
 
 
+#ifdef CONFIG_CPU_CAVIUM_OCTEON
+#define mmiowb() wmb()
+#else
 /* Depends on MIPS II instruction set */
 #define mmiowb() asm volatile ("sync" ::: "memory")
+#endif
 
 static inline void memset_io(volatile void __iomem *addr, unsigned char val, int count)
 {