SH port submitted from Ralf Corsepius <corsepiu@faw.uni-ulm.de>.

1 files changed, 71 insertions, 0 deletions

diff --git a/c/src/exec/score/cpu/sh/rtems.c b/c/src/exec/score/cpu/sh/rtems.c
new file mode 100644
index 0000000000..b0e0e22e02
--- /dev/null
+++ b/c/src/exec/score/cpu/sh/rtems.c
@@ -0,0 +1,71 @@
+/* 
+ *  This file contains the single entry point code for
+ *  the SH implementation of RTEMS.
+ *
+ *  NOTE:  This is supposed to be a .S or .s file NOT a C file.
+ *
+ *  NOTE: UNTESTED, very likely this does not not work.
+ *
+ *  Author: Ralf Corsepius (corsepiu@faw.uni-ulm.de)
+ *
+ *  COPYRIGHT (c) 1997-1998, FAW Ulm, Germany
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * 
+ *
+ *  COPYRIGHT (c) 1998.
+ *  On-Line Applications Research Corporation (OAR).
+ *  Copyright assigned to U.S. Government, 1994.
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.OARcorp.com/rtems/license.html.
+ *
+ *  $Id$
+ */
+
+/*
+ *  This is supposed to be an assembly file.  This means that system.h
+ *  and cpu.h should not be included in a "real" rtems file.
+ */
+
+/* #include <rtems/system.h> */
+/* #include <rtems/score/cpu.h> */
+/* #include "asm.h" */
+
+/*
+ * This should work but due to a bug in rtems building scheme it doesn't work
+ */
+ 
+/* #include <rtems/directives.h> */
+
+extern void* _Entry_points[] ;
+
+/*
+ *  RTEMS
+ *
+ *  This routine jumps to the directive indicated in the
+ *  CPU defined register.  This routine is used when RTEMS is
+ *  linked by itself and placed in ROM.  This routine is the
+ *  first address in the ROM space for RTEMS.  The user "calls"
+ *  this address with the directive arguments in the normal place.
+ *  This routine then jumps indirectly to the correct directive
+ *  preserving the arguments.  The directive should not realize
+ *  it has been "wrapped" in this way.  The table "_Entry_points"
+ *  is used to look up the directive.
+ */
+
+void __RTEMS()
+{
+  asm volatile ( 
+       ".global _RTEMS
+_RTEMS:" );
+
+  asm volatile ( 
+       "jmp %0
+   	rts
+   	nop"
+    :: "m" (_Entry_points) );
+}