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-rw-r--r--lib_mips/board.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/lib_mips/board.c b/lib_mips/board.c
index 91ccec04df7..c1a0acf4698 100644
--- a/lib_mips/board.c
+++ b/lib_mips/board.c
@@ -62,6 +62,11 @@ static ulong mem_malloc_start;
static ulong mem_malloc_end;
static ulong mem_malloc_brk;
+/*
+ * mips_io_port_base is the begin of the address space to which x86 style
+ * I/O ports are mapped.
+ */
+unsigned long mips_io_port_base = -1;
/*
* The Malloc area is immediately below the monitor copy in DRAM