linux/arch/alpha/include/asm/io_trivial.h
Linus Torvalds 024b246ed2 alpha: move include/asm-alpha to arch/alpha/include/asm
Sam Ravnborg did the build-test that the direct header file move works,
I'm just committing it.

This is a pure move:

	mkdir arch/alpha/include
	git mv include/asm-alpha arch/alpha/include/asm

with no other changes.

Requested-and-tested-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-08-15 09:19:40 -07:00

131 lines
3 KiB
C

/* Trivial implementations of basic i/o routines. Assumes that all
of the hard work has been done by ioremap and ioportmap, and that
access to i/o space is linear. */
/* This file may be included multiple times. */
#if IO_CONCAT(__IO_PREFIX,trivial_io_bw)
__EXTERN_INLINE unsigned int
IO_CONCAT(__IO_PREFIX,ioread8)(void __iomem *a)
{
return __kernel_ldbu(*(volatile u8 __force *)a);
}
__EXTERN_INLINE unsigned int
IO_CONCAT(__IO_PREFIX,ioread16)(void __iomem *a)
{
return __kernel_ldwu(*(volatile u16 __force *)a);
}
__EXTERN_INLINE void
IO_CONCAT(__IO_PREFIX,iowrite8)(u8 b, void __iomem *a)
{
__kernel_stb(b, *(volatile u8 __force *)a);
}
__EXTERN_INLINE void
IO_CONCAT(__IO_PREFIX,iowrite16)(u16 b, void __iomem *a)
{
__kernel_stw(b, *(volatile u16 __force *)a);
}
#endif
#if IO_CONCAT(__IO_PREFIX,trivial_io_lq)
__EXTERN_INLINE unsigned int
IO_CONCAT(__IO_PREFIX,ioread32)(void __iomem *a)
{
return *(volatile u32 __force *)a;
}
__EXTERN_INLINE void
IO_CONCAT(__IO_PREFIX,iowrite32)(u32 b, void __iomem *a)
{
*(volatile u32 __force *)a = b;
}
#endif
#if IO_CONCAT(__IO_PREFIX,trivial_rw_bw) == 1
__EXTERN_INLINE u8
IO_CONCAT(__IO_PREFIX,readb)(const volatile void __iomem *a)
{
return __kernel_ldbu(*(const volatile u8 __force *)a);
}
__EXTERN_INLINE u16
IO_CONCAT(__IO_PREFIX,readw)(const volatile void __iomem *a)
{
return __kernel_ldwu(*(const volatile u16 __force *)a);
}
__EXTERN_INLINE void
IO_CONCAT(__IO_PREFIX,writeb)(u8 b, volatile void __iomem *a)
{
__kernel_stb(b, *(volatile u8 __force *)a);
}
__EXTERN_INLINE void
IO_CONCAT(__IO_PREFIX,writew)(u16 b, volatile void __iomem *a)
{
__kernel_stw(b, *(volatile u16 __force *)a);
}
#elif IO_CONCAT(__IO_PREFIX,trivial_rw_bw) == 2
__EXTERN_INLINE u8
IO_CONCAT(__IO_PREFIX,readb)(const volatile void __iomem *a)
{
void __iomem *addr = (void __iomem *)a;
return IO_CONCAT(__IO_PREFIX,ioread8)(addr);
}
__EXTERN_INLINE u16
IO_CONCAT(__IO_PREFIX,readw)(const volatile void __iomem *a)
{
void __iomem *addr = (void __iomem *)a;
return IO_CONCAT(__IO_PREFIX,ioread16)(addr);
}
__EXTERN_INLINE void
IO_CONCAT(__IO_PREFIX,writeb)(u8 b, volatile void __iomem *a)
{
void __iomem *addr = (void __iomem *)a;
IO_CONCAT(__IO_PREFIX,iowrite8)(b, addr);
}
__EXTERN_INLINE void
IO_CONCAT(__IO_PREFIX,writew)(u16 b, volatile void __iomem *a)
{
void __iomem *addr = (void __iomem *)a;
IO_CONCAT(__IO_PREFIX,iowrite16)(b, addr);
}
#endif
#if IO_CONCAT(__IO_PREFIX,trivial_rw_lq) == 1
__EXTERN_INLINE u32
IO_CONCAT(__IO_PREFIX,readl)(const volatile void __iomem *a)
{
return *(const volatile u32 __force *)a;
}
__EXTERN_INLINE u64
IO_CONCAT(__IO_PREFIX,readq)(const volatile void __iomem *a)
{
return *(const volatile u64 __force *)a;
}
__EXTERN_INLINE void
IO_CONCAT(__IO_PREFIX,writel)(u32 b, volatile void __iomem *a)
{
*(volatile u32 __force *)a = b;
}
__EXTERN_INLINE void
IO_CONCAT(__IO_PREFIX,writeq)(u64 b, volatile void __iomem *a)
{
*(volatile u64 __force *)a = b;
}
#endif
#if IO_CONCAT(__IO_PREFIX,trivial_iounmap)
__EXTERN_INLINE void IO_CONCAT(__IO_PREFIX,iounmap)(volatile void __iomem *a)
{
}
#endif