2008-09-25 Joel Sherrill <joel.sherrill@oarcorp.com>

	* Makefile.am, configure.ac, sh7032/score/cpu_asm.c,
	sh7045/score/cpu_asm.c, sh7750/score/cpu_asm.c: Move duplicated
	context switch code to score/cpu and provide an interrupt handling
	stub for the GDB SuperH simulator since it does not support
	interrupts or devices. This has been used to run tests on the
	simulator BSP as SH1, SH2, and SH4.
	* shgdb/score/cpu_asm.c, shgdb/score/ispshgdb.c: New files.

1 files changed, 83 insertions, 0 deletions

diff --git a/c/src/lib/libcpu/sh/shgdb/score/cpu_asm.c b/c/src/lib/libcpu/sh/shgdb/score/cpu_asm.c
new file mode 100644
index 0000000000..210e4ee1f4
--- /dev/null
+++ b/c/src/lib/libcpu/sh/shgdb/score/cpu_asm.c
@@ -0,0 +1,83 @@
+/*
+ *  Support for SuperH Simulator in GDB
+ *
+ *  COPYRIGHT (c) 1989-2008.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.com/license/LICENSE.
+ *
+ *  $Id$
+ */
+
+#include <rtems/system.h>
+#include <rtems/score/cpu.h>
+#include <rtems/score/isr.h>
+#include <rtems/score/thread.h>
+#include <rtems/score/sh.h>
+
+#if( CPU_HAS_SOFTWARE_INTERRUPT_STACK == TRUE)
+  unsigned long    *_old_stack_ptr;
+#endif
+
+register unsigned long  *stack_ptr asm("r15");
+
+/*
+ *  This routine provides the RTEMS interrupt management.
+ */
+
+void __ISR_Handler( uint32_t   vector)
+{
+  ISR_Level level;
+
+  _ISR_Disable( level );
+
+  _Thread_Dispatch_disable_level++;
+
+#if( CPU_HAS_SOFTWARE_INTERRUPT_STACK == TRUE)
+  if( _ISR_Nest_level == 0 )
+    {
+      /* Install irq stack */
+      _old_stack_ptr = stack_ptr;
+      stack_ptr = _CPU_Interrupt_stack_high;
+    }
+
+#endif
+
+  _ISR_Nest_level++;
+
+  _ISR_Enable( level );
+
+  /* call isp */
+  if( _ISR_Vector_table[ vector])
+    (*_ISR_Vector_table[ vector ])( vector );
+
+  _ISR_Disable( level );
+
+  _Thread_Dispatch_disable_level--;
+
+  _ISR_Nest_level--;
+
+#if( CPU_HAS_SOFTWARE_INTERRUPT_STACK == TRUE)
+
+  if( _ISR_Nest_level == 0 )
+    /* restore old stack pointer */
+    stack_ptr = _old_stack_ptr;
+#endif
+
+  _ISR_Enable( level );
+
+  if ( _ISR_Nest_level )
+    return;
+
+  if ( _Thread_Dispatch_disable_level ) {
+    _ISR_Signals_to_thread_executing = FALSE;
+    return;
+  }
+
+  if ( _Context_Switch_necessary || _ISR_Signals_to_thread_executing ) {
+    _ISR_Signals_to_thread_executing = FALSE;
+    _Thread_Dispatch();
+  }
+}