[rtems commit] powerpc: Use wrtee for e6500 multilib

[Sebastian Huber]

Module:    rtems
Branch:    master
Commit:    08317ef3ff739b5abce2cbc0fc8bc2d9eb310b99
Changeset: http://git.rtems.org/rtems/commit/?id=08317ef3ff739b5abce2cbc0fc8bc2d9eb310b99

Author:    Sebastian Huber <sebastian.huber at embedded-brains.de>
Date:      Fri Oct  2 07:30:13 2015 +0200

powerpc: Use wrtee for e6500 multilib

This reduces the code size.

---

 cpukit/score/cpu/powerpc/rtems/powerpc/registers.h | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/cpukit/score/cpu/powerpc/rtems/powerpc/registers.h b/cpukit/score/cpu/powerpc/rtems/powerpc/registers.h
index 5502120..c982e46 100644
--- a/cpukit/score/cpu/powerpc/rtems/powerpc/registers.h
+++ b/cpukit/score/cpu/powerpc/rtems/powerpc/registers.h
@@ -620,6 +620,14 @@ static inline uint32_t ppc_interrupt_get_disable_mask( void )
 static inline uint32_t ppc_interrupt_disable( void )
 {
   uint32_t level;
+
+#if defined(__PPC_CPU_E6500__)
+  __asm__ volatile (
+    "mfmsr %0;"
+    "wrteei 0"
+    : "=r" (level)
+  );
+#else
   uint32_t mask;
 
   __asm__ volatile (
@@ -630,17 +638,26 @@ static inline uint32_t ppc_interrupt_disable( void )
     "mtmsr %1"
     : "=r" (level), "=r" (mask)
   );
+#endif
 
   return level;
 }
 
 static inline void ppc_interrupt_enable( uint32_t level )
 {
+#if defined(__PPC_CPU_E6500__)
+  __asm__ volatile (
+    "wrtee %0"
+    :
+    : "r" (level)
+  );
+#else
   __asm__ volatile (
     "mtmsr %0"
     :
     : "r" (level)
   );
+#endif
 }
 
 static inline void ppc_interrupt_flash( uint32_t level )