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-rw-r--r--arch/xtensa/include/asm/io.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/xtensa/include/asm/io.h b/arch/xtensa/include/asm/io.h
index 1482a3636381..2a042d430c25 100644
--- a/arch/xtensa/include/asm/io.h
+++ b/arch/xtensa/include/asm/io.h
@@ -24,6 +24,16 @@
#define IO_SPACE_LIMIT ~0
#ifdef CONFIG_MMU
+
+#if XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY && CONFIG_OF
+extern unsigned long xtensa_kio_paddr;
+
+static inline unsigned long xtensa_get_kio_paddr(void)
+{
+ return xtensa_kio_paddr;
+}
+#endif
+
/*
* Return the virtual address for the specified bus memory.
* Note that we currently don't support any address outside the KIO segment.