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asm-generic/io.h: allow people to override individual funcs 

For the Blackfin port, we can use much of the asm-generic/io.h header,
but we still need to declare some of our own versions of functions.
Like the __raw_read* and in/out "string" helpers.  So let people do
this easily for many of these funcs.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Mike Frysinger 2010-10-18 03:09:39 -04:00 committed by Arnd Bergmann
parent d852a6afd9
commit 35dbc0e020
1 changed files with 26 additions and 0 deletions
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26
include/asm-generic/io.h
View File

@ -19,7 +19,9 @@
#include <asm-generic/iomap.h>
#endif
#ifndef mmiowb
#define mmiowb() do {} while (0)
#endif
/*****************************************************************************/
/*
@ -28,39 +30,51 @@
* differently. On the simple architectures, we just read/write the
* memory location directly.
*/
#ifndef __raw_readb
static inline u8 __raw_readb(const volatile void __iomem *addr)
{
return *(const volatile u8 __force *) addr;
}
#endif
#ifndef __raw_readw
static inline u16 __raw_readw(const volatile void __iomem *addr)
{
return *(const volatile u16 __force *) addr;
}
#endif
#ifndef __raw_readl
static inline u32 __raw_readl(const volatile void __iomem *addr)
{
return *(const volatile u32 __force *) addr;
}
#endif
#define readb __raw_readb
#define readw(addr) __le16_to_cpu(__raw_readw(addr))
#define readl(addr) __le32_to_cpu(__raw_readl(addr))
#ifndef __raw_writeb
static inline void __raw_writeb(u8 b, volatile void __iomem *addr)
{
*(volatile u8 __force *) addr = b;
}
#endif
#ifndef __raw_writew
static inline void __raw_writew(u16 b, volatile void __iomem *addr)
{
*(volatile u16 __force *) addr = b;
}
#endif
#ifndef __raw_writel
static inline void __raw_writel(u32 b, volatile void __iomem *addr)
{
*(volatile u32 __force *) addr = b;
}
#endif
#define writeb __raw_writeb
#define writew(b,addr) __raw_writew(__cpu_to_le16(b),addr)
@ -122,6 +136,7 @@ static inline void outl(u32 b, unsigned long addr)
#define outw_p(x, addr) outw((x), (addr))
#define outl_p(x, addr) outl((x), (addr))
#ifndef insb
static inline void insb(unsigned long addr, void *buffer, int count)
{
if (count) {
@ -132,7 +147,9 @@ static inline void insb(unsigned long addr, void *buffer, int count)
} while (--count);
}
}
#endif
#ifndef insw
static inline void insw(unsigned long addr, void *buffer, int count)
{
if (count) {
@ -143,7 +160,9 @@ static inline void insw(unsigned long addr, void *buffer, int count)
} while (--count);
}
}
#endif
#ifndef insl
static inline void insl(unsigned long addr, void *buffer, int count)
{
if (count) {
@ -154,7 +173,9 @@ static inline void insl(unsigned long addr, void *buffer, int count)
} while (--count);
}
}
#endif
#ifndef outsb
static inline void outsb(unsigned long addr, const void *buffer, int count)
{
if (count) {
@ -164,7 +185,9 @@ static inline void outsb(unsigned long addr, const void *buffer, int count)
} while (--count);
}
}
#endif
#ifndef outsw
static inline void outsw(unsigned long addr, const void *buffer, int count)
{
if (count) {
@ -174,7 +197,9 @@ static inline void outsw(unsigned long addr, const void *buffer, int count)
} while (--count);
}
}
#endif
#ifndef outsl
static inline void outsl(unsigned long addr, const void *buffer, int count)
{
if (count) {
@ -184,6 +209,7 @@ static inline void outsl(unsigned long addr, const void *buffer, int count)
} while (--count);
}
}
#endif
#ifndef CONFIG_GENERIC_IOMAP
#define ioread8(addr) readb(addr)