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-rw-r--r--include/asm-avr32/io.h32
1 files changed, 32 insertions, 0 deletions
diff --git a/include/asm-avr32/io.h b/include/asm-avr32/io.h
index 3c0d569..ba14674 100644
--- a/include/asm-avr32/io.h
+++ b/include/asm-avr32/io.h
@@ -93,4 +93,36 @@ static inline void sync(void)
{
}
+/*
+ * 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".
+ *
+ * This implementation works for memory below 512MiB (flash, etc.) as
+ * well as above 3.5GiB (internal peripherals.)
+ */
+typedef unsigned long phys_addr_t;
+
+#define MAP_NOCACHE (0)
+#define MAP_WRCOMBINE (1 << 7)
+#define MAP_WRBACK (MAP_WRCOMBINE | (1 << 9))
+#define MAP_WRTHROUGH (MAP_WRBACK | (1 << 0))
+
+static inline void *
+map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
+{
+ if (flags == MAP_WRBACK)
+ return (void *)P1SEGADDR(paddr);
+ else
+ return (void *)P2SEGADDR(paddr);
+}
+
+/*
+ * Take down a mapping set up by map_physmem().
+ */
+static inline void unmap_physmem(void *vaddr, unsigned long len)
+{
+
+}
+
#endif /* __ASM_AVR32_IO_H */