mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 14:43:58 +08:00
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
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of the hard work has been done by ioremap and ioportmap, and that
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access to i/o space is linear. */
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/* This file may be included multiple times. */
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#if IO_CONCAT(__IO_PREFIX,trivial_io_bw)
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__EXTERN_INLINE unsigned int
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IO_CONCAT(__IO_PREFIX,ioread8)(void __iomem *a)
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{
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return __kernel_ldbu(*(volatile u8 __force *)a);
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}
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__EXTERN_INLINE unsigned int
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IO_CONCAT(__IO_PREFIX,ioread16)(void __iomem *a)
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{
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return __kernel_ldwu(*(volatile u16 __force *)a);
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}
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__EXTERN_INLINE void
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IO_CONCAT(__IO_PREFIX,iowrite8)(u8 b, void __iomem *a)
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{
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__kernel_stb(b, *(volatile u8 __force *)a);
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}
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__EXTERN_INLINE void
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IO_CONCAT(__IO_PREFIX,iowrite16)(u16 b, void __iomem *a)
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{
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__kernel_stw(b, *(volatile u16 __force *)a);
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}
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#endif
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#if IO_CONCAT(__IO_PREFIX,trivial_io_lq)
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__EXTERN_INLINE unsigned int
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IO_CONCAT(__IO_PREFIX,ioread32)(void __iomem *a)
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{
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return *(volatile u32 __force *)a;
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}
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__EXTERN_INLINE void
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IO_CONCAT(__IO_PREFIX,iowrite32)(u32 b, void __iomem *a)
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{
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*(volatile u32 __force *)a = b;
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}
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#endif
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#if IO_CONCAT(__IO_PREFIX,trivial_rw_bw) == 1
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__EXTERN_INLINE u8
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IO_CONCAT(__IO_PREFIX,readb)(const volatile void __iomem *a)
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{
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return __kernel_ldbu(*(const volatile u8 __force *)a);
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}
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__EXTERN_INLINE u16
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IO_CONCAT(__IO_PREFIX,readw)(const volatile void __iomem *a)
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{
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return __kernel_ldwu(*(const volatile u16 __force *)a);
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}
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__EXTERN_INLINE void
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IO_CONCAT(__IO_PREFIX,writeb)(u8 b, volatile void __iomem *a)
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{
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__kernel_stb(b, *(volatile u8 __force *)a);
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}
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__EXTERN_INLINE void
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IO_CONCAT(__IO_PREFIX,writew)(u16 b, volatile void __iomem *a)
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{
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__kernel_stw(b, *(volatile u16 __force *)a);
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}
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#elif IO_CONCAT(__IO_PREFIX,trivial_rw_bw) == 2
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__EXTERN_INLINE u8
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IO_CONCAT(__IO_PREFIX,readb)(const volatile void __iomem *a)
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{
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return IO_CONCAT(__IO_PREFIX,ioread8)((void __iomem *)a);
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}
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__EXTERN_INLINE u16
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IO_CONCAT(__IO_PREFIX,readw)(const volatile void __iomem *a)
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{
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return IO_CONCAT(__IO_PREFIX,ioread16)((void __iomem *)a);
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}
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__EXTERN_INLINE void
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IO_CONCAT(__IO_PREFIX,writeb)(u8 b, volatile void __iomem *a)
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{
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IO_CONCAT(__IO_PREFIX,iowrite8)(b, (void __iomem *)a);
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}
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__EXTERN_INLINE void
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IO_CONCAT(__IO_PREFIX,writew)(u16 b, volatile void __iomem *a)
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{
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IO_CONCAT(__IO_PREFIX,iowrite16)(b, (void __iomem *)a);
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}
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#endif
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#if IO_CONCAT(__IO_PREFIX,trivial_rw_lq) == 1
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__EXTERN_INLINE u32
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IO_CONCAT(__IO_PREFIX,readl)(const volatile void __iomem *a)
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{
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return *(const volatile u32 __force *)a;
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}
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__EXTERN_INLINE u64
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IO_CONCAT(__IO_PREFIX,readq)(const volatile void __iomem *a)
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{
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return *(const volatile u64 __force *)a;
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}
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__EXTERN_INLINE void
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IO_CONCAT(__IO_PREFIX,writel)(u32 b, volatile void __iomem *a)
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{
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*(volatile u32 __force *)a = b;
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}
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__EXTERN_INLINE void
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IO_CONCAT(__IO_PREFIX,writeq)(u64 b, volatile void __iomem *a)
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{
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*(volatile u64 __force *)a = b;
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}
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#endif
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#if IO_CONCAT(__IO_PREFIX,trivial_iounmap)
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__EXTERN_INLINE void IO_CONCAT(__IO_PREFIX,iounmap)(volatile void __iomem *a)
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{
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}
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#endif
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