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Diffstat (limited to 'include/asm-nios2/io.h')
-rw-r--r--include/asm-nios2/io.h34
1 files changed, 34 insertions, 0 deletions
diff --git a/include/asm-nios2/io.h b/include/asm-nios2/io.h
index 5bb5322..a52b95c 100644
--- a/include/asm-nios2/io.h
+++ b/include/asm-nios2/io.h
@@ -29,10 +29,44 @@ static inline void sync(void)
__asm__ __volatile__ ("sync" : : : "memory");
}
+/*
+ * Given a physical address and a length, return a virtual address
+ * that can be used to access the memory range with the caching
+ * properties specified by "flags".
+ */
+typedef unsigned long phys_addr_t;
+
+#define MAP_NOCACHE (0)
+#define MAP_WRCOMBINE (0)
+#define MAP_WRBACK (0)
+#define MAP_WRTHROUGH (0)
+
+static inline void *
+map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
+{
+ return (void *)paddr;
+}
+
+/*
+ * Take down a mapping set up by map_physmem().
+ */
+static inline void unmap_physmem(void *vaddr, unsigned long flags)
+{
+
+}
+
extern unsigned char inb (unsigned char *port);
extern unsigned short inw (unsigned short *port);
extern unsigned inl (unsigned port);
+#define __raw_writeb(v,a) (*(volatile unsigned char *)(a) = (v))
+#define __raw_writew(v,a) (*(volatile unsigned short *)(a) = (v))
+#define __raw_writel(v,a) (*(volatile unsigned int *)(a) = (v))
+
+#define __raw_readb(a) (*(volatile unsigned char *)(a))
+#define __raw_readw(a) (*(volatile unsigned short *)(a))
+#define __raw_readl(a) (*(volatile unsigned int *)(a))
+
#define readb(addr)\
({unsigned char val;\
asm volatile( "ldbio %0, 0(%1)" :"=r"(val) : "r" (addr)); val;})