[rtems commit] bsps/powerpc: Add TMR access macros

[Sebastian Huber]

Module:    rtems
Branch:    master
Commit:    7bad67256e0bb113a5e9a09c3866c7d976c0d662
Changeset: http://git.rtems.org/rtems/commit/?id=7bad67256e0bb113a5e9a09c3866c7d976c0d662

Author:    Sebastian Huber <sebastian.huber at embedded-brains.de>
Date:      Tue Dec 23 08:30:40 2014 +0100

bsps/powerpc: Add TMR access macros

---

 .../powerpc/shared/include/powerpc-utility.h       | 28 ++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/c/src/lib/libcpu/powerpc/shared/include/powerpc-utility.h b/c/src/lib/libcpu/powerpc/shared/include/powerpc-utility.h
index 1cceb75..331aa58 100644
--- a/c/src/lib/libcpu/powerpc/shared/include/powerpc-utility.h
+++ b/c/src/lib/libcpu/powerpc/shared/include/powerpc-utility.h
@@ -628,6 +628,34 @@ static inline void ppc_set_decrementer_register(uint32_t dec)
   } while (0)
 
 /**
+ * @brief Returns the value of the Thread Management Register with number @a tmr.
+ *
+ * @note This macro uses a GNU C extension.
+ */
+#define PPC_THREAD_MGMT_REGISTER(tmr) \
+  ({ \
+    uint32_t val; \
+    __asm__ volatile (\
+      "mftmr %0, " PPC_STRINGOF(tmr) \
+      : "=r" (val) \
+    ); \
+    val;\
+  } )
+
+/**
+ * @brief Sets the Thread Management Register with number @a tmr to the value in
+ * @a val.
+ */
+#define PPC_SET_THREAD_MGMT_REGISTER(tmr, val) \
+  do { \
+    __asm__ volatile (\
+      "mttmr " PPC_STRINGOF(tmr) ", %0" \
+      : \
+      : "r" (val) \
+    ); \
+  } while (0)
+
+/**
  * @brief Returns the value of the Device Control Register with number @a dcr.
  *
  * The PowerPC 4XX family has Device Control Registers.