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-rw-r--r--arch/alpha/include/asm/io_trivial.h131
1 files changed, 131 insertions, 0 deletions
diff --git a/arch/alpha/include/asm/io_trivial.h b/arch/alpha/include/asm/io_trivial.h
new file mode 100644
index 0000000..1c77f10
--- /dev/null
+++ b/arch/alpha/include/asm/io_trivial.h
@@ -0,0 +1,131 @@
+/* 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
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