From 53ad02103fb8be4138a9937a8ab91fcdff7b4987 Mon Sep 17 00:00:00 2001
From: Stefan Roese <sr@denx.de>
Date: Fri, 1 Jun 2007 15:16:58 +0200
Subject: [PATCH] ppc4xx: Update in_be32() functions and friends to latest
Linux version
Signed-off-by: Stefan Roese <sr@denx.de>
---
include/asm-ppc/io.h | 89 +++++++++++++++++++++++++++-----------------
1 file changed, 55 insertions(+), 34 deletions(-)
diff --git a/include/asm-ppc/io.h b/include/asm-ppc/io.h
index bbc9ba0be6..03289bcc21 100644
--- a/include/asm-ppc/io.h
+++ b/include/asm-ppc/io.h
@@ -105,6 +105,11 @@ static inline void sync(void)
__asm__ __volatile__ ("sync" : : : "memory");
}
+static inline void isync(void)
+{
+ __asm__ __volatile__ ("isync" : : : "memory");
+}
+
/* Enforce in-order execution of data I/O.
* No distinction between read/write on PPC; use eieio for all three.
*/
@@ -114,74 +119,90 @@ static inline void sync(void)
/*
* 8, 16 and 32 bit, big and little endian I/O operations, with barrier.
+ *
+ * Read operations have additional twi & isync to make sure the read
+ * is actually performed (i.e. the data has come back) before we start
+ * executing any following instructions.
*/
-extern inline int in_8(volatile u8 *addr)
+#define __iomem
+extern inline int in_8(const volatile unsigned char __iomem *addr)
{
- int ret;
+ int ret;
- __asm__ __volatile__("lbz%U1%X1 %0,%1; eieio" : "=r" (ret) : "m" (*addr));
- return ret;
+ __asm__ __volatile__(
+ "sync; lbz%U1%X1 %0,%1;\n"
+ "twi 0,%0,0;\n"
+ "isync" : "=r" (ret) : "m" (*addr));
+ return ret;
}
-extern inline void out_8(volatile u8 *addr, int val)
+extern inline void out_8(volatile unsigned char __iomem *addr, int val)
{
- __asm__ __volatile__("stb%U0%X0 %1,%0; eieio" : "=m" (*addr) : "r" (val));
+ __asm__ __volatile__("stb%U0%X0 %1,%0; eieio" : "=m" (*addr) : "r" (val));
}
-extern inline int in_le16(volatile u16 *addr)
+extern inline int in_le16(const volatile unsigned short __iomem *addr)
{
- int ret;
+ int ret;
- __asm__ __volatile__("lhbrx %0,0,%1; eieio" : "=r" (ret) :
- "r" (addr), "m" (*addr));
- return ret;
+ __asm__ __volatile__("sync; lhbrx %0,0,%1;\n"
+ "twi 0,%0,0;\n"
+ "isync" : "=r" (ret) :
+ "r" (addr), "m" (*addr));
+ return ret;
}
-extern inline int in_be16(volatile u16 *addr)
+extern inline int in_be16(const volatile unsigned short __iomem *addr)
{
- int ret;
+ int ret;
- __asm__ __volatile__("lhz%U1%X1 %0,%1; eieio" : "=r" (ret) : "m" (*addr));
- return ret;
+ __asm__ __volatile__("sync; lhz%U1%X1 %0,%1;\n"
+ "twi 0,%0,0;\n"
+ "isync" : "=r" (ret) : "m" (*addr));
+ return ret;
}
-extern inline void out_le16(volatile u16 *addr, int val)
+extern inline void out_le16(volatile unsigned short __iomem *addr, int val)
{
- __asm__ __volatile__("sthbrx %1,0,%2; eieio" : "=m" (*addr) :
- "r" (val), "r" (addr));
+ __asm__ __volatile__("sync; sthbrx %1,0,%2" : "=m" (*addr) :
+ "r" (val), "r" (addr));
}
-extern inline void out_be16(volatile u16 *addr, int val)
+extern inline void out_be16(volatile unsigned short __iomem *addr, int val)
{
- __asm__ __volatile__("sth%U0%X0 %1,%0; eieio" : "=m" (*addr) : "r" (val));
+ __asm__ __volatile__("sync; sth%U0%X0 %1,%0" : "=m" (*addr) : "r" (val));
}
-extern inline unsigned in_le32(volatile u32 *addr)
+extern inline unsigned in_le32(const volatile unsigned __iomem *addr)
{
- unsigned ret;
+ unsigned ret;
- __asm__ __volatile__("lwbrx %0,0,%1; eieio" : "=r" (ret) :
- "r" (addr), "m" (*addr));
- return ret;
+ __asm__ __volatile__("sync; lwbrx %0,0,%1;\n"
+ "twi 0,%0,0;\n"
+ "isync" : "=r" (ret) :
+ "r" (addr), "m" (*addr));
+ return ret;
}
-extern inline unsigned in_be32(volatile u32 *addr)
+extern inline unsigned in_be32(const volatile unsigned __iomem *addr)
{
- unsigned ret;
+ unsigned ret;
- __asm__ __volatile__("lwz%U1%X1 %0,%1; eieio" : "=r" (ret) : "m" (*addr));
- return ret;
+ __asm__ __volatile__("sync; lwz%U1%X1 %0,%1;\n"
+ "twi 0,%0,0;\n"
+ "isync" : "=r" (ret) : "m" (*addr));
+ return ret;
}
-extern inline void out_le32(volatile unsigned *addr, int val)
+extern inline void out_le32(volatile unsigned __iomem *addr, int val)
{
- __asm__ __volatile__("stwbrx %1,0,%2; eieio" : "=m" (*addr) :
- "r" (val), "r" (addr));
+ __asm__ __volatile__("sync; stwbrx %1,0,%2" : "=m" (*addr) :
+ "r" (val), "r" (addr));
}
-extern inline void out_be32(volatile unsigned *addr, int val)
+extern inline void out_be32(volatile unsigned __iomem *addr, int val)
{
- __asm__ __volatile__("stw%U0%X0 %1,%0; eieio" : "=m" (*addr) : "r" (val));
+ __asm__ __volatile__("sync; stw%U0%X0 %1,%0" : "=m" (*addr) : "r" (val));
}
#endif
--
2.39.5