Introduce virt_to_phys()
virt_to_phys() returns the physical address given a virtual. In most
cases this will be just the input value as the vast majority of
systems run in a 1:1 mode.
However in systems that are not running this way it should report the
physical address or ~0 if no mapping exists for the given virtual
address.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/include/asm-arm/io.h b/include/asm-arm/io.h
index f4ae307..fec3a7e 100644
--- a/include/asm-arm/io.h
+++ b/include/asm-arm/io.h
@@ -57,6 +57,11 @@
}
+static inline phys_addr_t virt_to_phys(void * vaddr)
+{
+ return (phys_addr_t)(vaddr);
+}
+
/*
* Generic virtual read/write. Note that we don't support half-word
* read/writes. We define __arch_*[bl] here, and leave __arch_*w