Added routines to enable/disable interrupts for Patmos

c/src/lib/libbsp/bfin/acinclude.m4

@@ -2,12 +2,12 @@
 AC_DEFUN([RTEMS_CHECK_BSPDIR],
 [
   case "$1" in
-  TLL6527M )
-    AC_CONFIG_SUBDIRS([TLL6527M]);;
   bf537Stamp )
     AC_CONFIG_SUBDIRS([bf537Stamp]);;
   eZKit533 )
     AC_CONFIG_SUBDIRS([eZKit533]);;
+  TLL6527M )
+    AC_CONFIG_SUBDIRS([TLL6527M]);;
   *)
     AC_MSG_ERROR([Invalid BSP]);;
   esac

c/src/lib/libbsp/patmos/pasim/Makefile.am

@@ -46,5 +46,8 @@ libbsp_a_SOURCES += clock/ckinit.c ../../../shared/clockdrv_shell.h
 # timer
 libbsp_a_SOURCES += timer/timer.c
 
+libbsp_a_LIBADD = ../../../libcpu/@RTEMS_CPU@/cache.rel \
+    ../../../libcpu/@RTEMS_CPU@/exceptions.rel
+
 include $(srcdir)/preinstall.am
 include $(top_srcdir)/../../../../automake/local.am

c/src/lib/libbsp/patmos/pasim/clock/ckinit.c

@@ -245,8 +245,7 @@ rtems_isr Clock_isr(
 	 * load general-purpose registers from the shadow stack
 	 * load special-purpose registers from the shadow stack cache
 	 */
-	asm volatile("restore_context: \n\t"
-			"lwc   $r0  = [ $r31 + %0 ] \n\t"				//load r0
+	asm volatile("lwc   $r0  = [ $r31 + %0 ] \n\t"			//load r0
 			"lwc   $r2  = [ $r31 + %1 ] \n\t"				//load r2
 			"lwc   $r3  = [ $r31 + %2 ] \n\t"				//load r3
 			"lwc   $r4  = [ $r31 + %3 ] \n\t"				//load r4
@@ -377,6 +376,8 @@ void Clock_exit( void )
 {
 	/* XXX: turn off the timer interrupts */
 
+	patmos_disable_interrupts();
+
 	/* XXX: If necessary, restore the old vector */
 }
 

c/src/lib/libbsp/patmos/pasim/include/pasim.h

@@ -175,6 +175,29 @@ extern uint64_t get_cpu_time(void);
  * End of RTC Management
  */
 
+
+/*
+ * Exception Management
+ */
+
+extern char _excunit_base; /* linker symbol giving the base address of the exception handling unit */
+
+/* The status register of the exception unit */
+#define EXC_STATUS (*((_iodev_ptr_t)(&_excunit_base+0x00)))
+
+/* The interrupt mask register */
+#define EXC_MASK   (*((_iodev_ptr_t)(&_excunit_base+0x04)))
+
+/* The pending interrupts register */
+#define EXC_PEND   (*((_iodev_ptr_t)(&_excunit_base+0x08)))
+
+/* The exception source register */
+#define EXC_SOURCE (*((_iodev_ptr_t)(&_excunit_base+0x0c)))
+
+/*
+ * End of Exception Management
+ */
+
 #endif /* !ASM */
 
 #ifdef __cplusplus

c/src/lib/libcpu/patmos/Makefile.am

@@ -1,14 +1,17 @@
 ##
-## $Id: Makefile.am,v 1.00 2013/06/14 15:17:12 André Rocha $
+## $Id: Makefile.am,v 1.00 2013/06/14 15:17:12 Andre Rocha $
 ##
 
 ACLOCAL_AMFLAGS = -I ../../../aclocal
 
 include $(top_srcdir)/../../../automake/compile.am
 
+
 noinst_PROGRAMS =
 
 include_libcpudir = $(includedir)/libcpu
+
+## cache
 include_libcpu_HEADERS = ../shared/include/cache.h
 
 noinst_PROGRAMS += cache.rel
@@ -21,5 +24,13 @@ if has_instruction_cache
 cache_rel_CPPFLAGS += -DHAS_INSTRUCTION_CACHE
 endif
 
+## exceptions
+include_libcpu_HEADERS += exceptions/exceptions.h
+
+noinst_PROGRAMS += exceptions.rel
+exceptions_rel_SOURCES = exceptions/exceptions.c
+exceptions_rel_CPPFLAGS = $(AM_CPPFLAGS) -I$(srcdir)/exceptions
+exceptions_rel_LDFLAGS = $(RTEMS_RELLDFLAGS)
+
 include $(srcdir)/preinstall.am
-include $(top_srcdir)/../../../automake/local.am
+include $(top_srcdir)/../../../automake/local.am

c/src/lib/libcpu/patmos/cache/cache.c

@@ -13,6 +13,11 @@
 /* XXX these need to be addressed */
 void _CPU_cache_invalidate_entire_instruction ( void )
 {
+<<<<<<< HEAD
+=======
+  // No flush instruction at the moment
+  //asm volatile ("flush");
+>>>>>>> 0524f11f213c4b1a72cf113f24422977a9bae877
 }
 
 void _CPU_cache_freeze_instruction ( void )

c/src/lib/libcpu/patmos/exceptions/exceptions.c

@@ -0,0 +1,35 @@
+/*
+ *  Exceptions
+ *
+ *  This module implements functions to handle exceptions in Patmos
+ *
+ *
+ *  Project: T-CREST - Time-Predictable Multi-Core Architecture for Embedded Systems
+ *
+ *  Copyright (C) GMVIS Skysoft S.A., 2014
+ *  @author Andre Rocha
+ *
+ *  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.
+ *
+ */
+
+#include <stdlib.h>
+
+#include <rtems.h>
+#include <bsp.h>
+
+/*
+ * Enable interrupts
+ */
+void patmos_enable_interrupts(void){
+  EXC_STATUS |= 1;
+}
+
+/*
+ * Disable interrupts
+ */
+void patmos_disable_interrupts(void){
+  EXC_STATUS &= ~1;
+}

c/src/lib/libcpu/patmos/exceptions/exceptions.h

@@ -0,0 +1,23 @@
+/*
+ *  Patmos Exception Management
+ *
+ *  Project: T-CREST - Time-Predictable Multi-Core Architecture for Embedded Systems
+ *
+ *  Copyright (C) GMVIS Skysoft S.A., 2014
+ *  @author Andre Rocha
+ *
+ *  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.
+ */
+
+#ifndef __PATMOS_EXCEPTIONS_h
+#define __PATMOS_EXCEPTIONS_h
+
+void patmos_enable_interrupts(void);
+
+void patmos_disable_interrupts(void);
+
+#endif
+
+/* end of include file */

c/src/lib/libcpu/patmos/preinstall.am

@@ -22,3 +22,7 @@ $(PROJECT_INCLUDE)/libcpu/cache.h: ../shared/include/cache.h $(PROJECT_INCLUDE)/
 	$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/libcpu/cache.h
 PREINSTALL_FILES += $(PROJECT_INCLUDE)/libcpu/cache.h
 
+$(PROJECT_INCLUDE)/libcpu/exceptions.h: exceptions/exceptions.h $(PROJECT_INCLUDE)/libcpu/$(dirstamp)
+	$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/libcpu/exceptions.h
+PREINSTALL_FILES += $(PROJECT_INCLUDE)/libcpu/exceptions.h
+

cpukit/score/cpu/patmos/rtems/score/cpu.h

@@ -9,7 +9,7 @@
  *  Project: T-CREST - Time-Predictable Multi-Core Architecture for Embedded Systems
  *
  *  Copyright (C) GMVIS Skysoft S.A., 2013
- *  @author André Rocha
+ *  @author Andre Rocha
  *
  *  The license and distribution terms for this file may be
  *  found in the file LICENSE in this distribution or at
@@ -564,7 +564,8 @@ SCORE_EXTERN volatile uint32_t _CPU_ISR_Dispatch_disable;
  *  level is returned in _level.
  */
 
-#define _CPU_ISR_Disable( _level )  
+#define _CPU_ISR_Disable( _level ) \
+		patmos_disable_interrupts()
 
 /*
  *  Enable interrupts to the previous level (returned by _CPU_ISR_Disable).
@@ -572,7 +573,8 @@ SCORE_EXTERN volatile uint32_t _CPU_ISR_Dispatch_disable;
  *  _level is not modified.
  */
 
-#define _CPU_ISR_Enable( _level )  
+#define _CPU_ISR_Enable( _level ) \
+		patmos_enable_interrupts()
 
 /*
  *  This temporarily restores the interrupt to _level before immediately

cpukit/score/cpu/patmos/rtems/score/patmos.h

@@ -9,7 +9,7 @@
  *  Project: T-CREST - Time-Predictable Multi-Core Architecture for Embedded Systems
  *
  *  Copyright (C) GMVIS Skysoft S.A., 2013
- *  @author André Rocha
+ *  @author Andre Rocha
  *
  *  The license and distribution terms for this file may be
  *  found in the file LICENSE in this distribution or at
@@ -24,9 +24,13 @@
 extern "C" {
 #endif
 
+#ifndef ASM
+#include <libcpu/exceptions.h>
+#endif
+
 /*
  *  This file contains the information required to build
- *  RTEMS for a particular member of the "patmos" family.  It does
+ *  RTEMS for a particular member of the Patmos family.  It does
  *  this by setting variables to indicate which implementation
  *  dependent features are present in a particular member
  *  of the family.