mirror of
https://github.com/torvalds/linux.git
synced 2024-11-15 08:31:55 +00:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
128 lines
2.9 KiB
C
128 lines
2.9 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)
|
|
{
|
|
return IO_CONCAT(__IO_PREFIX,ioread8)((void __iomem *)a);
|
|
}
|
|
|
|
__EXTERN_INLINE u16
|
|
IO_CONCAT(__IO_PREFIX,readw)(const volatile void __iomem *a)
|
|
{
|
|
return IO_CONCAT(__IO_PREFIX,ioread16)((void __iomem *)a);
|
|
}
|
|
|
|
__EXTERN_INLINE void
|
|
IO_CONCAT(__IO_PREFIX,writeb)(u8 b, volatile void __iomem *a)
|
|
{
|
|
IO_CONCAT(__IO_PREFIX,iowrite8)(b, (void __iomem *)a);
|
|
}
|
|
|
|
__EXTERN_INLINE void
|
|
IO_CONCAT(__IO_PREFIX,writew)(u16 b, volatile void __iomem *a)
|
|
{
|
|
IO_CONCAT(__IO_PREFIX,iowrite16)(b, (void __iomem *)a);
|
|
}
|
|
#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
|