1 files changed, 21 insertions, 0 deletions

diff --git a/arch/arm/mm/ioremap.c b/arch/arm/mm/ioremap.c
index ab506272b2d3..bdb248c4f55c 100644
--- a/arch/arm/mm/ioremap.c
+++ b/arch/arm/mm/ioremap.c
@@ -289,6 +289,27 @@ __arm_ioremap(unsigned long phys_addr, size_t size, unsigned int mtype)
 }
 EXPORT_SYMBOL(__arm_ioremap);
 
+/*
+ * Remap an arbitrary physical address space into the kernel virtual
+ * address space as memory. Needed when the kernel wants to execute
+ * code in external memory. This is needed for reprogramming source
+ * clocks that would affect normal memory for example. Please see
+ * CONFIG_GENERIC_ALLOCATOR for allocating external memory.
+ */
+void __iomem *
+__arm_ioremap_exec(unsigned long phys_addr, size_t size, bool cached)
+{
+        unsigned int mtype;
+
+        if (cached)
+                mtype = MT_MEMORY;
+        else
+                mtype = MT_MEMORY_NONCACHED;
+
+        return __arm_ioremap_caller(phys_addr, size, mtype,
+                        __builtin_return_address(0));
+}
+
 void __iounmap(volatile void __iomem *io_addr)
 {
         void *addr = (void *)(PAGE_MASK & (unsigned long)io_addr);