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Subject[PATCH 1/7] asm-generic/io.h: add io{read,write}64 accessors
Date
This will allow device drivers to consistently use io{read,write}XX
also for 64-bit accesses.

Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
---
include/asm-generic/io.h | 63 +++++++++++++++++++++++++++++++++++++++++++++
include/asm-generic/iomap.h | 8 ++++++
2 files changed, 71 insertions(+)

diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h
index eed3bbe88c8a..0e2c73bb6d56 100644
--- a/include/asm-generic/io.h
+++ b/include/asm-generic/io.h
@@ -585,6 +585,16 @@ static inline u32 ioread32(const volatile void __iomem *addr)
}
#endif

+#ifdef CONFIG_64BIT
+#ifndef ioread64
+#define ioread64 ioread64
+static inline u64 ioread64(const volatile void __iomem *addr)
+{
+ return readq(addr);
+}
+#endif
+#endif /* CONFIG_64BIT */
+
#ifndef iowrite8
#define iowrite8 iowrite8
static inline void iowrite8(u8 value, volatile void __iomem *addr)
@@ -609,6 +619,16 @@ static inline void iowrite32(u32 value, volatile void __iomem *addr)
}
#endif

+#ifdef CONFIG_64BIT
+#ifndef iowrite64
+#define iowrite64 iowrite64
+static inline void iowrite64(u64 value, volatile void __iomem *addr)
+{
+ writeq(value, addr);
+}
+#endif
+#endif /* CONFIG_64BIT */
+
#ifndef ioread16be
#define ioread16be ioread16be
static inline u16 ioread16be(const volatile void __iomem *addr)
@@ -625,6 +645,16 @@ static inline u32 ioread32be(const volatile void __iomem *addr)
}
#endif

+#ifdef CONFIG_64BIT
+#ifndef ioread64be
+#define ioread64be ioread64be
+static inline u64 ioread64be(const volatile void __iomem *addr)
+{
+ return __be64_to_cpu(__raw_readq(addr));
+}
+#endif
+#endif /* CONFIG_64BIT */
+
#ifndef iowrite16be
#define iowrite16be iowrite16be
static inline void iowrite16be(u16 value, void volatile __iomem *addr)
@@ -641,6 +671,16 @@ static inline void iowrite32be(u32 value, volatile void __iomem *addr)
}
#endif

+#ifdef CONFIG_64BIT
+#ifndef iowrite64be
+#define iowrite64be iowrite64be
+static inline void iowrite64be(u64 value, volatile void __iomem *addr)
+{
+ __raw_writeq(__cpu_to_be64(value), addr);
+}
+#endif
+#endif /* CONFIG_64BIT */
+
#ifndef ioread8_rep
#define ioread8_rep ioread8_rep
static inline void ioread8_rep(const volatile void __iomem *addr, void *buffer,
@@ -668,6 +708,17 @@ static inline void ioread32_rep(const volatile void __iomem *addr,
}
#endif

+#ifdef CONFIG_64BIT
+#ifndef ioread64_rep
+#define ioread64_rep ioread64_rep
+static inline void ioread64_rep(const volatile void __iomem *addr,
+ void *buffer, unsigned int count)
+{
+ readsq(addr, buffer, count);
+}
+#endif
+#endif /* CONFIG_64BIT */
+
#ifndef iowrite8_rep
#define iowrite8_rep iowrite8_rep
static inline void iowrite8_rep(volatile void __iomem *addr,
@@ -697,6 +748,18 @@ static inline void iowrite32_rep(volatile void __iomem *addr,
writesl(addr, buffer, count);
}
#endif
+
+#ifdef CONFIG_64BIT
+#ifndef iowrite64_rep
+#define iowrite64_rep iowrite64_rep
+static inline void iowrite64_rep(volatile void __iomem *addr,
+ const void *buffer,
+ unsigned int count)
+{
+ writesq(addr, buffer, count);
+}
+#endif
+#endif /* CONFIG_64BIT */
#endif /* CONFIG_GENERIC_IOMAP */

#ifdef __KERNEL__
diff --git a/include/asm-generic/iomap.h b/include/asm-generic/iomap.h
index d8f8622fa044..650fede33c25 100644
--- a/include/asm-generic/iomap.h
+++ b/include/asm-generic/iomap.h
@@ -30,12 +30,20 @@ extern unsigned int ioread16(void __iomem *);
extern unsigned int ioread16be(void __iomem *);
extern unsigned int ioread32(void __iomem *);
extern unsigned int ioread32be(void __iomem *);
+#ifdef CONFIG_64BIT
+extern u64 ioread64(void __iomem *);
+extern u64 ioread64be(void __iomem *);
+#endif

extern void iowrite8(u8, void __iomem *);
extern void iowrite16(u16, void __iomem *);
extern void iowrite16be(u16, void __iomem *);
extern void iowrite32(u32, void __iomem *);
extern void iowrite32be(u32, void __iomem *);
+#ifdef CONFIG_64BIT
+extern void iowrite64(u64, void __iomem *);
+extern void iowrite64be(u64, void __iomem *);
+#endif

/*
* "string" versions of the above. Note that they
--
2.4.4
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