Merged of mcp750 and mvme2307 BSP by Eric Valette <valette@crf.canon.fr>.

As part of this effort, the mpc750 libcpu code is now shared with the
ppc6xx.

1 files changed, 61 insertions, 0 deletions

diff --git a/c/src/lib/libbsp/powerpc/support/old_exception_processing/ppccache.c b/c/src/lib/libbsp/powerpc/support/old_exception_processing/ppccache.c
new file mode 100644
index 0000000000..ecfb4b96ca
--- /dev/null
+++ b/c/src/lib/libbsp/powerpc/support/old_exception_processing/ppccache.c
@@ -0,0 +1,61 @@
+/*
+ *  PowerPC Cache enable routines
+ *
+ *  $Id$
+ */
+
+#include <rtems/system.h>
+
+#define PPC_Get_HID0( _value ) \
+  do { \
+      _value = 0;        /* to avoid warnings */ \
+      asm volatile( \
+          "mfspr %0, 0x3f0;"     /* get HID0 */ \
+          "isync" \
+          : "=r" (_value) \
+          : "0" (_value) \
+      ); \
+  } while (0)
+
+#define PPC_Set_HID0( _value ) \
+  do { \
+      asm volatile( \
+          "isync;" \
+          "mtspr 0x3f0, %0;"     /* load HID0 */ \
+          "isync" \
+          : "=r" (_value) \
+          : "0" (_value) \
+      ); \
+  } while (0)
+
+
+void powerpc_instruction_cache_enable ()
+{
+  unsigned32 value;
+
+  /*
+   * Enable the instruction cache
+   */
+
+  PPC_Get_HID0( value );
+
+  value |= 0x00008000;       /* Set ICE bit */
+
+  PPC_Set_HID0( value );
+}
+
+void powerpc_data_cache_enable ()
+{
+  unsigned32 value;
+
+  /*
+   * enable data cache
+   */
+
+  PPC_Get_HID0( value );
+
+  value |= 0x00004000;        /* set DCE bit */
+
+  PPC_Set_HID0( value );
+}
+