map virtual address to physical address in kernel

Change-Id: Id18e604facd517598a18968af3dff927026ad894
Reviewed-on: http://gfw160.austin.ibm.com:8080/gerrit/272
Tested-by: Jenkins Server
Reviewed-by: A. Patrick Williams III <iawillia@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/src/include/kernel/segment.H b/src/include/kernel/segment.H
index a3df88602..05c5c0fdc 100644
--- a/src/include/kernel/segment.H
+++ b/src/include/kernel/segment.H
@@ -27,6 +27,7 @@
 #define __KERNEL_SEGMENT_H
 
 #include <kernel/task.H>
+#include <errno.h>
 
 /** @class Segment
  *  @brief Virtual segment class to handle virtual memory management within
@@ -66,6 +67,14 @@ class Segment
          */
         uint64_t getBaseAddress() const { return iv_baseAddress; };
 
+        /**
+         * @brief Locate the physical address of the given virtual address
+         * @param[in] i_vaddr virtual address
+         * @return the physical address bound to the virtual address,
+         *          or -EFAULT if i_vaddr not found. @see errno.h
+         */
+         virtual uint64_t findPhysicalAddress(uint64_t i_vaddr) const { return -EFAULT; };
+
     protected:
             /** The base address of the segment. */
         const uint64_t iv_baseAddress;