2004-04-12 David Querbach <querbach@realtime.bc.ca>

* README, configure.ac, mpc5xx/Makefile.am, mpc5xx/exceptions/raw_exception.c, mpc5xx/exceptions/raw_exception.h, mpc5xx/timer/timer.c, shared/include/cpuIdent.h: addition of a significant amount of MPC5xx support as part of the addition of the SS555 BSP. * mpc5xx/README, mpc5xx/clock/clock.c, mpc5xx/console-generic/console-generic.c, mpc5xx/include/console.h, mpc5xx/include/mpc5xx.h, mpc5xx/irq/irq.c, mpc5xx/irq/irq.h, mpc5xx/irq/irq_asm.S, mpc5xx/irq/irq_init.c, mpc5xx/vectors/vectors.S, mpc5xx/vectors/vectors.h, mpc5xx/vectors/vectors_init.c: New files. * mpc5xx/exceptions/asm_utils.S: Removed.
author: Joel Sherrill <joel.sherrill@OARcorp.com> 2004-04-12 22:04:28 +0000
committer: Joel Sherrill <joel.sherrill@OARcorp.com> 2004-04-12 22:04:28 +0000
commit: 8430205c224c1bfcb67156e5b97dd44ecd81fd7d (patch)
tree: 5ce5170ec6f228407d7ebfab0c1efbf17c495595 /c/src/lib/libcpu/powerpc/mpc5xx
parent: 2004-04-12 David Querbach <querbach@realtime.bc.ca> (diff)
download: rtems-8430205c224c1bfcb67156e5b97dd44ecd81fd7d.tar.bz2
17 files changed, 3377 insertions, 309 deletions
diff --git a/c/src/lib/libcpu/powerpc/mpc5xx/Makefile.am b/c/src/lib/libcpu/powerpc/mpc5xx/Makefile.am
index 582a354de6..2e035eac11 100644
--- a/c/src/lib/libcpu/powerpc/mpc5xx/Makefile.am
+++ b/c/src/lib/libcpu/powerpc/mpc5xx/Makefile.am
@@ -10,14 +10,49 @@ noinst_DATA =
 include $(top_srcdir)/../../../automake/compile.am
 
 if mpc5xx
+include_mpc5xxdir = $(includedir)/mpc5xx
 include_libcpudir = $(includedir)/libcpu
 
-# exceptions
+include_HEADERS = include/mpc5xx.h
+
+## clock
+EXTRA_PROGRAMS += clock.rel
+CLEANFILES += clock.rel
+clock_rel_SOURCES = clock/clock.c
+clock_rel_CPPFLAGS = $(AM_CPPFLAGS) $(CFLAGS_OPTIMIZE_V)
+clock_rel_LDFLAGS = $(RTEMS_RELLDFLAGS)
+
+EXTRA_PROGRAMS += clock_g.rel
+CLEANFILES += clock_g.rel
+clock_g_rel_SOURCES = $(clock_rel_SOURCES)
+clock_g_rel_CPPFLAGS = $(AM_CPPFLAGS) $(CFLAGS_DEBUG_V)
+clock_g_rel_LDFLAGS = $(RTEMS_RELLDFLAGS)
+
+noinst_DATA += clock$(LIB_VARIANT).rel
+
+## console-generic
+include_mpc5xx_HEADERS = include/console.h
+
+EXTRA_PROGRAMS += console-generic.rel
+CLEANFILES += console-generic.rel
+console_generic_rel_SOURCES = console-generic/console-generic.c
+console_generic_rel_CPPFLAGS = $(AM_CPPFLAGS) $(CFLAGS_OPTIMIZE_V)
+console_generic_rel_LDFLAGS = $(RTEMS_RELLDFLAGS)
+
+EXTRA_PROGRAMS += console-generic_g.rel
+CLEANFILES += console-generic_g.rel
+console_generic_g_rel_SOURCES = $(console_generic_rel_SOURCES)
+console_generic_g_rel_CPPFLAGS = $(AM_CPPFLAGS) $(CFLAGS_DEBUG_V)
+console_generic_g_rel_LDFLAGS = $(RTEMS_RELLDFLAGS)
+
+noinst_DATA += console-generic$(LIB_VARIANT).rel
+
+## exceptions
 include_libcpu_HEADERS = exceptions/raw_exception.h
 
 EXTRA_PROGRAMS += exceptions.rel
 CLEANFILES += exceptions.rel
-exceptions_rel_SOURCES = exceptions/raw_exception.c exceptions/asm_utils.S
+exceptions_rel_SOURCES = exceptions/raw_exception.c
 exceptions_rel_CPPFLAGS = $(AM_CPPFLAGS) $(CFLAGS_OPTIMIZE_V)
 exceptions_rel_LDFLAGS = $(RTEMS_RELLDFLAGS)
 
@@ -29,24 +64,24 @@ exceptions_g_rel_LDFLAGS = $(RTEMS_RELLDFLAGS)
 
 noinst_DATA += exceptions$(LIB_VARIANT).rel
 
-# ictrl
-include_HEADERS = ictrl/ictrl.h
+## irq
+include_libcpu_HEADERS += irq/irq.h
 
-EXTRA_PROGRAMS += ictrl.rel
-CLEANFILES += ictrl.rel
-ictrl_rel_SOURCES = ictrl/ictrl.c ictrl/ictrl.h
-ictrl_rel_CPPFLAGS = $(AM_CPPFLAGS) $(CFLAGS_OPTIMIZE_V)
-ictrl_rel_LDFLAGS = $(RTEMS_RELLDFLAGS)
+EXTRA_PROGRAMS += irq.rel
+CLEANFILES += irq.rel
+irq_rel_SOURCES = irq/irq.c irq/irq_init.c irq/irq_asm.S
+irq_rel_CPPFLAGS = $(AM_CPPFLAGS) $(CFLAGS_OPTIMIZE_V)
+irq_rel_LDFLAGS = $(RTEMS_RELLDFLAGS)
 
-EXTRA_PROGRAMS += ictrl_g.rel
-CLEANFILES += ictrl_g.rel
-ictrl_g_rel_SOURCES = $(ictrl_rel_SOURCES)
-ictrl_g_rel_CPPFLAGS = $(AM_CPPFLAGS) $(CFLAGS_DEBUG_V)
-ictrl_g_rel_LDFLAGS = $(RTEMS_RELLDFLAGS)
+EXTRA_PROGRAMS += irq_g.rel
+CLEANFILES += irq_g.rel
+irq_g_rel_SOURCES = $(irq_rel_SOURCES)
+irq_g_rel_CPPFLAGS = $(AM_CPPFLAGS) $(CFLAGS_DEBUG_V)
+irq_g_rel_LDFLAGS = $(RTEMS_RELLDFLAGS)
 
-noinst_DATA += ictrl$(LIB_VARIANT).rel
+noinst_DATA += irq$(LIB_VARIANT).rel
 
-# timer
+## timer
 EXTRA_PROGRAMS += timer.rel
 CLEANFILES += timer.rel
 timer_rel_SOURCES = timer/timer.c
@@ -60,8 +95,28 @@ timer_g_rel_CPPFLAGS = $(AM_CPPFLAGS) $(CFLAGS_DEBUG_V)
 timer_g_rel_LDFLAGS = $(RTEMS_RELLDFLAGS)
 
 noinst_DATA += timer$(LIB_VARIANT).rel
+
+## vectors
+include_libcpu_HEADERS += vectors/vectors.h
+
+EXTRA_PROGRAMS += vectors.rel
+CLEANFILES += vectors.rel
+vectors_rel_SOURCES = vectors/vectors_init.c vectors/vectors.S
+vectors_rel_CPPFLAGS = $(AM_CPPFLAGS) $(CFLAGS_OPTIMIZE_V)
+vectors_rel_LDFLAGS = $(RTEMS_RELLDFLAGS)
+
+EXTRA_PROGRAMS += vectors_g.rel
+CLEANFILES += vectors_g.rel
+vectors_g_rel_SOURCES = $(vectors_rel_SOURCES)
+vectors_g_rel_CPPFLAGS = $(AM_CPPFLAGS) $(CFLAGS_DEBUG_V)
+vectors_g_rel_LDFLAGS = $(RTEMS_RELLDFLAGS)
+
+noinst_DATA += vectors$(LIB_VARIANT).rel
 endif
 
+## --
+all-local: $(PREINSTALL_FILES)
+
 PREINSTALL_DIRS =
 PREINSTALL_FILES =
 
@@ -71,21 +126,38 @@ $(PROJECT_INCLUDE)/$(dirstamp):
 PREINSTALL_DIRS += $(PROJECT_INCLUDE)/$(dirstamp)
 
 if mpc5xx
+$(PROJECT_INCLUDE)/mpc5xx/$(dirstamp):
+	@$(mkdir_p) $(PROJECT_INCLUDE)/mpc5xx
+	@: > $(PROJECT_INCLUDE)/mpc5xx/$(dirstamp)
+PREINSTALL_DIRS += $(PROJECT_INCLUDE)/mpc5xx/$(dirstamp)
+
 $(PROJECT_INCLUDE)/libcpu/$(dirstamp):
 	@$(mkdir_p) $(PROJECT_INCLUDE)/libcpu
 	@: > $(PROJECT_INCLUDE)/libcpu/$(dirstamp)
 PREINSTALL_DIRS += $(PROJECT_INCLUDE)/libcpu/$(dirstamp)
 
+$(PROJECT_INCLUDE)/mpc5xx.h: include/mpc5xx.h $(PROJECT_INCLUDE)/$(dirstamp)
+	$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/mpc5xx.h
+PREINSTALL_FILES += $(PROJECT_INCLUDE)/mpc5xx.h
+
+$(PROJECT_INCLUDE)/mpc5xx/console.h: include/console.h $(PROJECT_INCLUDE)/mpc5xx/$(dirstamp)
+	$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/mpc5xx/console.h
+PREINSTALL_FILES += $(PROJECT_INCLUDE)/mpc5xx/console.h
+
 $(PROJECT_INCLUDE)/libcpu/raw_exception.h: exceptions/raw_exception.h $(PROJECT_INCLUDE)/libcpu/$(dirstamp)
 	$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/libcpu/raw_exception.h
 PREINSTALL_FILES += $(PROJECT_INCLUDE)/libcpu/raw_exception.h
 
-$(PROJECT_INCLUDE)/ictrl.h: ictrl/ictrl.h $(PROJECT_INCLUDE)/$(dirstamp)
-	$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/ictrl.h
-PREINSTALL_FILES += $(PROJECT_INCLUDE)/ictrl.h
+$(PROJECT_INCLUDE)/libcpu/irq.h: irq/irq.h $(PROJECT_INCLUDE)/libcpu/$(dirstamp)
+	$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/libcpu/irq.h
+PREINSTALL_FILES += $(PROJECT_INCLUDE)/libcpu/irq.h
+
+$(PROJECT_INCLUDE)/libcpu/vectors.h: vectors/vectors.h $(PROJECT_INCLUDE)/libcpu/$(dirstamp)
+	$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/libcpu/vectors.h
+PREINSTALL_FILES += $(PROJECT_INCLUDE)/libcpu/vectors.h
 endif
 
 CLEANFILES += $(PREINSTALL_FILES)
 DISTCLEANFILES = $(PREINSTALL_DIRS)
 
-include $(top_srcdir)/../../../../../automake/local.am
+include $(top_srcdir)/../../../automake/local.am
diff --git a/c/src/lib/libcpu/powerpc/mpc5xx/README b/c/src/lib/libcpu/powerpc/mpc5xx/README
new file mode 100644
index 0000000000..47b9a7b9be
--- /dev/null
+++ b/c/src/lib/libcpu/powerpc/mpc5xx/README
@@ -0,0 +1,27 @@
+#
+#  $Id$
+#
+
+Various non-BSP-dependent support routines.
+
+timer -		Support for the RTEMS timer tick, using the Programmable
+		Interval Timer (PIT).
+
+console-generic	- Console support via the on-chip dual SCI port in the QSMCM
+		module.
+
+exception -	Installation and deinstallation of exception handlers, by
+		manipulation of exception vector table.
+
+irq -		Exception handler for all external and decrementer interrupts. 
+		Generalized interrupt handler which calls specific handlers
+		via entries in the interrupt connection table.  Interrupt
+		connection table maintenance routines.  USIU and UIMB
+		interrupt masking and level control.
+
+timer -		Support for RTEMS timer tests, using the PowerPC timebase
+		(TB) registers.
+
+vectors -	Compressed MPC5XX exception vector table, exception handler
+		prologues, default exception handler.  Code to initialize
+		table with default handlers.
diff --git a/c/src/lib/libcpu/powerpc/mpc5xx/clock/clock.c b/c/src/lib/libcpu/powerpc/mpc5xx/clock/clock.c
new file mode 100644
index 0000000000..eac471218e
--- /dev/null
+++ b/c/src/lib/libcpu/powerpc/mpc5xx/clock/clock.c
@@ -0,0 +1,196 @@
+/* clock.c
+ *
+ *  This routine initializes the PIT on the MPC5xx.
+ *  The tick frequency is specified by the bsp.
+ *
+ *
+ *  MPC5xx port sponsored by Defence Research and Development Canada - Suffield
+ *  Copyright (C) 2004, Real-Time Systems Inc. (querbach@realtime.bc.ca)
+ *
+ *  Derived from c/src/lib/libcpu/powerpc/mpc8xx/clock/clock.c:
+ *
+ *  Author: Jay Monkman (jmonkman@frasca.com)
+ *  Copyright (C) 1998 by Frasca International, Inc.
+ *
+ *  Derived from c/src/lib/libcpu/ppc/ppc403/clock/clock.c:
+ *
+ *  Author: Andrew Bray <andy@i-cubed.co.uk>
+ *
+ *  COPYRIGHT (c) 1995 by i-cubed ltd.
+ *
+ *  To anyone who acknowledges that this file is provided "AS IS"
+ *  without any express or implied warranty:
+ *      permission to use, copy, modify, and distribute this file
+ *      for any purpose is hereby granted without fee, provided that
+ *      the above copyright notice and this notice appears in all
+ *      copies, and that the name of i-cubed limited not be used in
+ *      advertising or publicity pertaining to distribution of the
+ *      software without specific, written prior permission.
+ *      i-cubed limited makes no representations about the suitability
+ *      of this software for any purpose.
+ *
+ *  Derived from c/src/lib/libcpu/hppa1_1/clock/clock.c:
+ *
+ *  COPYRIGHT (c) 1989-1998.
+ *  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.h>
+#include <clockdrv.h>
+#include <rtems/libio.h>
+#include <libcpu/irq.h>
+
+#include <stdlib.h>                     /* for atexit() */
+#include <mpc5xx.h>
+
+volatile rtems_unsigned32 Clock_driver_ticks;
+extern int BSP_connect_clock_handler(rtems_isr_entry);
+extern int BSP_disconnect_clock_handler();
+
+void Clock_exit( void );
+
+/*
+ * These are set by clock driver during its init
+ */
+ 
+rtems_device_major_number rtems_clock_major = ~0;
+rtems_device_minor_number rtems_clock_minor;
+ 
+/*
+ *  ISR Handler
+ */
+rtems_isr Clock_isr(rtems_vector_number vector)
+{
+  usiu.piscrk = USIU_UNLOCK_KEY;
+  usiu.piscr |= USIU_PISCR_PS;			/* acknowledge interrupt */
+  usiu.piscrk = 0;
+  
+  Clock_driver_ticks++;
+  rtems_clock_tick();
+}
+
+void clockOn(void* unused)
+{
+  unsigned desiredLevel;
+  rtems_unsigned32 pit_value;
+
+  /* calculate and set modulus */  
+  pit_value = (rtems_configuration_get_microseconds_per_tick() *
+               rtems_cpu_configuration_get_clicks_per_usec()) - 1 ;
+  
+  if (pit_value > 0xffff) {           /* pit is only 16 bits long */
+    rtems_fatal_error_occurred(-1);
+  }
+  usiu.sccrk = USIU_UNLOCK_KEY;
+  usiu.sccr &= ~USIU_SCCR_RTDIV;	/* RTC and PIT clock is divided by 4 */
+  usiu.sccrk = 0;
+
+  usiu.pitck = USIU_UNLOCK_KEY;
+  usiu.pitc = pit_value;
+  usiu.pitck = 0;
+
+  /* set PIT irq level, enable PIT, PIT interrupts */
+  /*  and clear int. status */
+  desiredLevel = CPU_irq_level_from_symbolic_name(CPU_PERIODIC_TIMER);
+
+  usiu.piscrk = USIU_UNLOCK_KEY;
+  usiu.piscr = USIU_PISCR_PIRQ(desiredLevel) 	/* set interrupt priority */
+             | USIU_PISCR_PS			/* acknowledge interrupt */
+             | USIU_PISCR_PIE			/* enable interrupt */
+             | USIU_PISCR_PITF			/* freeze during debug */
+             | USIU_PISCR_PTE;			/* enable timer */
+  usiu.piscrk = 0;
+}
+
+void
+clockOff(void* unused)
+{
+  /* disable PIT and PIT interrupts */
+  usiu.piscrk = USIU_UNLOCK_KEY;
+  usiu.piscr &= ~(USIU_PISCR_PTE | USIU_PISCR_PIE); 
+  usiu.piscrk = 0;
+}
+
+int clockIsOn(void* unused)
+{
+  if (usiu.piscr & USIU_PISCR_PIE) 
+    return 1;
+  return 0;
+}
+
+/*
+ * Called via atexit()
+ * Remove the clock interrupt handler by setting handler to NULL
+ */
+void
+Clock_exit(void)
+{
+  (void) BSP_disconnect_clock_handler ();
+}
+
+void Install_clock(rtems_isr_entry clock_isr)
+{
+  Clock_driver_ticks = 0;
+
+  BSP_connect_clock_handler (clock_isr);
+  atexit(Clock_exit);
+}
+
+void
+ReInstall_clock(rtems_isr_entry new_clock_isr)
+{
+  BSP_connect_clock_handler (new_clock_isr);
+}
+
+
+rtems_device_driver Clock_initialize(
+  rtems_device_major_number major,
+  rtems_device_minor_number minor,
+  void *pargp
+)
+{
+  Install_clock( Clock_isr );
+  
+  /*
+   * make major/minor avail to others such as shared memory driver
+   */
+ 
+  rtems_clock_major = major;
+  rtems_clock_minor = minor;
+ 
+  return RTEMS_SUCCESSFUL;
+}
+ 
+rtems_device_driver Clock_control(
+  rtems_device_major_number major,
+  rtems_device_minor_number minor,
+  void *pargp
+)
+{
+  rtems_libio_ioctl_args_t *args = pargp;
+  
+  if (args == 0)
+    goto done;
+  
+  /*
+   * This is hokey, but until we get a defined interface
+   * to do this, it will just be this simple...
+   */
+  
+  if (args->command == rtems_build_name('I', 'S', 'R', ' ')) {
+    Clock_isr(0);		/* vector number ignored */
+  }
+  else if (args->command == rtems_build_name('N', 'E', 'W', ' ')) {
+    ReInstall_clock(args->buffer);
+  }
+  
+ done:
+  return RTEMS_SUCCESSFUL;
+}
+
diff --git a/c/src/lib/libcpu/powerpc/mpc5xx/console-generic/console-generic.c b/c/src/lib/libcpu/powerpc/mpc5xx/console-generic/console-generic.c
new file mode 100644
index 0000000000..89282506a7
--- /dev/null
+++ b/c/src/lib/libcpu/powerpc/mpc5xx/console-generic/console-generic.c
@@ -0,0 +1,347 @@
+/*
+ *  General Serial I/O functions.
+ *
+ *  This file contains the functions for performing serial I/O.  The actual
+ *  system calls (console_*) should be in the BSP part of the source tree.
+ *  That way different BSPs can use whichever SCI they wish for /dev/console.
+ *
+ *  On-chip resources used:
+ *   resource   minor                note
+ *	SCI1	  0
+ *	SCI2	  1
+ *
+ *
+ *  MPC5xx port sponsored by Defence Research and Development Canada - Suffield
+ *  Copyright (C) 2004, Real-Time Systems Inc. (querbach@realtime.bc.ca)
+ *
+ *  Derived from 
+ *    c/src/lib/libcpu/powerpc/mpc8xx/console_generic/console_generic.c:
+ *  Author: Jay Monkman (jmonkman@frasca.com)
+ *  Copyright (C) 1998 by Frasca International, Inc.
+ *
+ *  Derived from c/src/lib/libbsp/m68k/gen360/console/console.c written by:
+ *    W. Eric Norum
+ *    Saskatchewan Accelerator Laboratory
+ *    University of Saskatchewan
+ *    Saskatoon, Saskatchewan, CANADA
+ *    eric@skatter.usask.ca
+ *
+ *  COPYRIGHT (c) 1989-1998.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  Modifications by Darlene Stewart <Darlene.Stewart@iit.nrc.ca>
+ *  and Charles-Antoine Gauthier <charles.gauthier@iit.nrc.ca>
+ *  Copyright (c) 1999, National Research Council of Canada
+ *
+ *  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 <stdlib.h>
+#include <unistd.h>
+#include <termios.h>
+#include <rtems.h>
+#include <rtems/libio.h>
+#include <rtems/bspIo.h>   /* for printk */
+#include <mpc5xx.h>
+#include <mpc5xx/console.h>
+#include <libcpu/irq.h>
+
+
+extern rtems_cpu_table Cpu_table;	/* for CPU clock speed */
+
+/*
+ * SCI port descriptor table.
+ */
+typedef struct
+{
+  volatile m5xxSCIRegisters_t *regs;	/* hardware registers */
+  struct rtems_termios_tty *ttyp;	/* termios data for this port */
+} sci_desc;
+
+static sci_desc sci_descs[] = {
+  { &imb.qsmcm.sci1, 0 },		/* SCI 1 */
+  { &imb.qsmcm.sci2, 0 },		/* SCI 2 */
+};
+
+/*
+ * Number of SCI port initialization calls made so far.  Used to avoid
+ * installing the common interrupt handler more than once.
+ */
+int init_calls = 0;
+
+/*
+ * Default configuration.
+ */
+static struct termios default_termios = {
+  0, 					/* input mode flags */
+  0, 					/* output mode flags */
+  CS8 | CREAD | CLOCAL | B9600, 	/* control mode flags */
+  0, 					/* local mode flags */
+  0,					/* line discipline */
+  { 0 }					/* control characters */
+};
+
+  
+/*
+ * Termios callback functions
+ */
+
+int
+m5xx_uart_firstOpen(
+  int major, 
+  int minor, 
+  void *arg
+)
+{
+  rtems_libio_open_close_args_t *args = arg;
+  sci_desc* desc = &sci_descs[minor];
+  struct rtems_termios_tty *tty = args->iop->data1;
+
+  desc->ttyp = tty;				/* connect tty */
+  if ( tty->device.outputUsesInterrupts == TERMIOS_IRQ_DRIVEN)
+    desc->regs->sccr1 |= QSMCM_SCI_RIE;		/* enable rx interrupt */
+
+  return RTEMS_SUCCESSFUL;
+}
+
+int
+m5xx_uart_lastClose(
+  int major, 
+  int minor,
+  void* arg
+)
+{
+  sci_desc* desc = &sci_descs[minor];
+
+  desc->regs->sccr1 &= ~(QSMCM_SCI_RIE | QSMCM_SCI_TIE);  /* disable all */
+  desc->ttyp = NULL;					  /* disconnect tty */
+
+  return RTEMS_SUCCESSFUL;
+}
+
+int
+m5xx_uart_pollRead(
+  int minor
+)
+{
+  volatile m5xxSCIRegisters_t *regs = sci_descs[minor].regs;
+  int c = -1;
+  
+  if ( regs ) {
+    while ( (regs->scsr & QSMCM_SCI_RDRF) == 0 )
+      ;
+    c = regs->scdr;
+  }
+
+  return c;
+}
+
+int 
+m5xx_uart_write(
+  int minor,
+  const char *buf,
+  int len
+)
+{
+  volatile m5xxSCIRegisters_t *regs = sci_descs[minor].regs;
+
+  regs->scdr = *buf;			/* start transmission */
+  regs->sccr1 |= QSMCM_SCI_TIE;		/* enable interrupt */
+  return 0;
+}
+
+int
+m5xx_uart_pollWrite(
+  int minor,
+  const char *buf,
+  int len
+)
+{
+  volatile m5xxSCIRegisters_t *regs = sci_descs[minor].regs;
+
+  while ( len-- ) {
+    while ( (regs->scsr & QSMCM_SCI_TDRE) == 0 )
+      ;
+    regs->scdr = *buf++;
+  }
+  return 0;
+}
+
+void
+m5xx_uart_reserve_resources(
+  rtems_configuration_table *configuration
+)
+{
+  rtems_termios_reserve_resources (configuration, NUM_PORTS);
+}
+
+int 
+m5xx_uart_setAttributes(
+  int minor,
+  const struct termios *t
+)
+{
+  rtems_unsigned16 sccr0 = sci_descs[minor].regs->sccr0;
+  rtems_unsigned16 sccr1 = sci_descs[minor].regs->sccr1;
+  int baud;
+  
+  /*
+   * Check that port number is valid
+   */
+  if ( (minor < SCI1_MINOR) || (minor > SCI2_MINOR) ) 
+    return RTEMS_INVALID_NUMBER;
+
+  /* Baud rate */
+  switch (t->c_cflag & CBAUD) {
+    default:      baud = -1;      break;
+    case B50:     baud = 50;      break;
+    case B75:     baud = 75;      break;
+    case B110:    baud = 110;     break;
+    case B134:    baud = 134;     break;
+    case B150:    baud = 150;     break;
+    case B200:    baud = 200;     break;
+    case B300:    baud = 300;     break;
+    case B600:    baud = 600;     break;
+    case B1200:   baud = 1200;    break;
+    case B1800:   baud = 1800;    break;
+    case B2400:   baud = 2400;    break;
+    case B4800:   baud = 4800;    break;
+    case B9600:   baud = 9600;    break;
+    case B19200:  baud = 19200;   break;
+    case B38400:  baud = 38400;   break;
+    case B57600:  baud = 57600;   break;
+    case B115200: baud = 115200;  break;
+    case B230400: baud = 230400;  break;
+    case B460800: baud = 460800;  break;
+  }
+  if (baud > 0) {
+    sccr0 &= ~QSMCM_SCI_BAUD(-1);
+    sccr0 |= 
+      QSMCM_SCI_BAUD((Cpu_table.clock_speed + (16 * baud)) / (32 * baud));
+  }
+     
+  /* Number of data bits -- not available with MPC5xx SCI */
+  switch ( t->c_cflag & CSIZE ) {
+    case CS5:     break;
+    case CS6:     break;
+    case CS7:     break;
+    case CS8:     break;
+  }
+
+  /* Stop bits -- not easily available with MPC5xx SCI */
+  if ( t->c_cflag & CSTOPB ) {
+    /* Two stop bits */
+  } else {
+    /* One stop bit */
+  }
+
+  /* Parity */
+  if ( t->c_cflag & PARENB )
+    sccr1 |= QSMCM_SCI_PE;
+  else
+    sccr1 &= ~QSMCM_SCI_PE;
+  
+  if ( t->c_cflag & PARODD )
+    sccr1 |= QSMCM_SCI_PT;
+  else
+    sccr1 &= ~QSMCM_SCI_PT;
+
+  /* Transmitter and receiver enable */
+  sccr1 |= QSMCM_SCI_TE;
+  if ( t->c_cflag & CREAD )
+    sccr1 |= QSMCM_SCI_RE;
+  else
+    sccr1 &= ~QSMCM_SCI_RE;
+    
+  /* Write hardware registers */
+  sci_descs[minor].regs->sccr0 = sccr0;
+  sci_descs[minor].regs->sccr1 = sccr1;
+  
+  return RTEMS_SUCCESSFUL;
+}
+
+
+/* 
+ * Interrupt handling.
+ */
+static void
+m5xx_sci_interrupt_handler (void)
+{
+  int minor;
+  
+  for ( minor = 0; minor < NUM_PORTS; minor++ ) {
+    sci_desc *desc = &sci_descs[minor];
+    int sccr1 = desc->regs->sccr1;
+    int scsr = desc->regs->scsr;
+        
+    /* 
+     * Character received?
+     */
+    if ((sccr1 & QSMCM_SCI_RIE) && (scsr & QSMCM_SCI_RDRF)) {
+      char c = desc->regs->scdr;
+      rtems_termios_enqueue_raw_characters(desc->ttyp, &c, 1);
+    }
+    /*
+     * Transmitter empty?
+     */
+    if ((sccr1 & QSMCM_SCI_TIE) && (scsr & QSMCM_SCI_TDRE)) {
+      desc->regs->sccr1 &= ~QSMCM_SCI_TIE;
+      rtems_termios_dequeue_characters (desc->ttyp, 1);
+    }
+  }
+}
+
+void m5xx_sci_nop(const rtems_irq_connect_data* ptr)
+{
+}
+
+int m5xx_sci_isOn(const rtems_irq_connect_data* ptr)
+{
+  return 1;
+}
+
+/*
+ * Basic initialization.
+ */
+
+void
+m5xx_uart_initialize (int minor)
+{
+  /*
+   * Check that minor number is valid.
+   */
+  if ( (minor < SCI1_MINOR) || (minor > SCI2_MINOR) ) 
+    return;
+
+  /*
+   * Configure and enable receiver and transmitter.
+   */
+  m5xx_uart_setAttributes(minor, &default_termios);
+   
+  /*
+   * Connect interrupt if not yet done.
+   */
+  if ( init_calls++ == 0 ) {
+    rtems_irq_connect_data irq_data;
+
+    irq_data.name = CPU_IRQ_SCI;
+    irq_data.hdl  = m5xx_sci_interrupt_handler;
+    irq_data.on   = m5xx_sci_nop;	/* can't enable both channels here */
+    irq_data.off  = m5xx_sci_nop;	/* can't disable both channels here */
+    irq_data.isOn = m5xx_sci_isOn;
+    
+    if (!CPU_install_rtems_irq_handler (&irq_data)) {
+      printk("Unable to connect SCI Irq handler\n");
+      rtems_fatal_error_occurred(1);
+    }
+
+    imb.qsmcm.qdsci_il = 		/* set interrupt level in port */
+      QSMCM_ILDSCI(CPU_irq_level_from_symbolic_name(CPU_IRQ_SCI));
+  }
+}
+
diff --git a/c/src/lib/libcpu/powerpc/mpc5xx/exceptions/asm_utils.S b/c/src/lib/libcpu/powerpc/mpc5xx/exceptions/asm_utils.S
deleted file mode 100644
index 36d9748c6b..0000000000
--- a/c/src/lib/libcpu/powerpc/mpc5xx/exceptions/asm_utils.S
+++ /dev/null
@@ -1,64 +0,0 @@
-/*
- *  asm_utils.s
- *
- *  asm_utils.S,v 1.2 2002/04/18 20:55:37 joel Exp
- *
- *  Copyright (C) 1999 Eric Valette (valette@crf.canon.fr)
- *
- *  This file contains the low-level support for moving exception
- *  exception code to appropriate location.
- *
- * Adapted for MPC5XX Wilfried Busalski (w.busalski@lancier-monitoring.de)
- * (C) Lancier Monitoring GmbH
- */
-
-#include <rtems/asm.h>
-#include <rtems/score/cpu.h>
-#include <libcpu/io.h>
-
-//SPR defines
-#define SPR_ICCST 	560
-
-
-	.globl  codemove
-codemove:
-	.type	codemove,@function
-/* r3 dest, r4 src, r5 length in bytes, r6 cachelinesize */
-	cmplw	cr1,r3,r4
-	addi	r0,r5,3
-	srwi.	r0,r0,2
-	beq	cr1,4f	/* In place copy is not necessary */
-	beq	7f	/* Protect against 0 count */
-	mtctr	r0
-	bge	cr1,2f
-	
-	la	r8,-4(r4)
-	la	r7,-4(r3)
-1:	lwzu	r0,4(r8)
-	stwu	r0,4(r7)	
-	bdnz	1b
-	b	4f
-
-2:	slwi	r0,r0,2
-	add	r8,r4,r0
-	add	r7,r3,r0
-3:	lwzu	r0,-4(r8)
-	stwu	r0,-4(r7)
-	bdnz	3b
-	
-/* Now flush the cache:	note that we must start from a cache aligned
- * address. Otherwise we might miss one cache line. 
- */
- 
-4:	lis		r0, 0x0A00		// Command Unlock All
-	mtspr	SPR_ICCST, r0	// Cache Unlock ALL	                               
-
-	lis		r0, 0x0C00		// Command Invalidate All
-	mtspr	SPR_ICCST, r0	// Cache Invalidate ALL	                               
-
-	lis		r0, 0x0200		// Command Enable All
-	mtspr	SPR_ICCST, r0	// Cache Enable ALL	                               
-	
-7:	sync		/* Wait for all icbi to complete on bus */
-	isync
-	blr
diff --git a/c/src/lib/libcpu/powerpc/mpc5xx/exceptions/raw_exception.c b/c/src/lib/libcpu/powerpc/mpc5xx/exceptions/raw_exception.c
index 649ec0b956..12fff2394e 100644
--- a/c/src/lib/libcpu/powerpc/mpc5xx/exceptions/raw_exception.c
+++ b/c/src/lib/libcpu/powerpc/mpc5xx/exceptions/raw_exception.c
@@ -1,24 +1,26 @@
 /*
- * raw_exception.c  - This file contains implementation of C function to
- *          	      Instanciate 8xx ppc primary exception entries.
- *	 	      More detailled information can be found on motorola
- *	    	      site and more precisely in the following book :
+ * raw_exception.c  - This file contains implementation of C functions to
+ *          	      Instantiate mpc5xx primary exception entries.
+ *	 	      More detailled information can be found on the Motorola
+ *	    	      site and more precisely in the following book:
  *
- *		      MPC860
- *		      Risc Microporcessor User's Manual
- *		      Motorola REF : MPC860UM/AD 
+ *		     MPC555/MPC556 User's Manual
+ *		     Motorola REF : MPC555UM/D Rev. 3, 2000 October 15
+ *
+ *
+ * MPC5xx port sponsored by Defence Research and Development Canada - Suffield
+ * Copyright (C) 2004, Real-Time Systems Inc. (querbach@realtime.bc.ca)
+ *
+ * Derived from libcpu/powerpc/mpc8xx/exceptions/raw_exception.c:
  *
  * Copyright (C) 1999  Eric Valette (valette@crf.canon.fr)
  *                     Canon Centre Recherche France.
  *
- * Changes for MPC5XX Wilfried Busalski (w.busalski@lancier-monitoring.de)
- * Copyright (C) 2003 Lancier Monitoring GmbH
- *
  *  The license and distribution terms for this file may be
  *  found in found in the file LICENSE in this distribution or at
- *  http://www.OARcorp.com/rtems/license.html.
+ *  http://www.rtems.com/license/LICENSE.
  *
- * raw_exception.c,v 1.5 2002/11/04 14:29:02 joel Exp
+ * $Id$
  */
 
 #include <rtems/system.h>
@@ -29,88 +31,76 @@
 #include <rtems/bspIo.h>	/* for printk */
 #include <string.h>
 
-void * codemove(void *, const void *, unsigned int, unsigned long);
-
 static rtems_raw_except_connect_data* 		raw_except_table;
 static rtems_raw_except_connect_data  		default_raw_except_entry;
 static rtems_raw_except_global_settings* 	local_settings;
 
-int mpc565_vector_is_valid(rtems_vector vector)
-{
-  switch(vector) {
-  case ASM_RESET_VECTOR: /* fall through */
-  case ASM_MACH_VECTOR:
-  case ASM_PROT_VECTOR:
-  case ASM_ISI_VECTOR:
-  case ASM_EXT_VECTOR:			   
-  case ASM_ALIGN_VECTOR:
-  case ASM_PROG_VECTOR:
-  case ASM_FLOAT_VECTOR:
-  case ASM_DEC_VECTOR:
-    
-  case ASM_SYS_VECTOR:
-  case ASM_TRACE_VECTOR:
-  case ASM_FLOATASSIST_VECTOR:
-
-  case ASM_SOFTEMUL_VECTOR:
-
-  case ASM_ITLBERROR_VECTOR:
-  case ASM_DTLBERROR_VECTOR:
-
-  case ASM_DBREAK_VECTOR:
-  case ASM_IBREAK_VECTOR:
-  case ASM_PERIFBREAK_VECTOR:
-  case ASM_DEVPORT_VECTOR:
-    return 1;
-  default: return 0;
-  }
-}
-
 int mpc5xx_vector_is_valid(rtems_vector vector)
 {
-     switch (current_ppc_cpu) {
-        case MPC_5XX:
-            if (!mpc565_vector_is_valid(vector)) {
-                return 0;
-            }
-            break;
-        default:
-            printk("Please complete libcpu/powerpc/mpc5xx/exceptions/raw_exception.c\n");
-            printk("current_ppc_cpu = %x\n", current_ppc_cpu);
-            return 0;
-     }
-     return 1;
+  switch (current_ppc_cpu) {
+    case PPC_5XX:
+      switch(vector) {
+        case ASM_RESET_VECTOR:
+        case ASM_MACH_VECTOR:
+
+        case ASM_EXT_VECTOR:
+        case ASM_ALIGN_VECTOR:
+        case ASM_PROG_VECTOR:
+        case ASM_FLOAT_VECTOR:
+        case ASM_DEC_VECTOR:
+
+        case ASM_SYS_VECTOR:
+        case ASM_TRACE_VECTOR:
+        case ASM_FLOATASSIST_VECTOR:
+
+        case ASM_SOFTEMUL_VECTOR:
+
+        case ASM_IPROT_VECTOR:
+        case ASM_DPROT_VECTOR:
+
+        case ASM_DBREAK_VECTOR:
+        case ASM_IBREAK_VECTOR:
+        case ASM_MEBREAK_VECTOR:
+        case ASM_NMEBREAK_VECTOR:
+          return 1;
+        default: 
+          return 0;
+      }
+    default:
+      printk("Please complete libcpu/powerpc/mpc5xx/exceptions/raw_exception.c\n");
+      printk("current_ppc_cpu = %x\n", current_ppc_cpu);
+      return 0;
+  }
 }
 
 int mpc5xx_set_exception  (const rtems_raw_except_connect_data* except)
 {
-    unsigned int level;
+  unsigned int level;
 
-    if (!mpc5xx_vector_is_valid(except->exceptIndex)) {
-      return 0;
-    }
-    /*
-     * Check if default handler is actually connected. If not issue an error.
-     * You must first get the current handler via mpc5xx_get_current_exception
-     * and then disconnect it using mpc5xx_delete_exception.
-     * RATIONALE : to always have the same transition by forcing the user
-     * to get the previous handler before accepting to disconnect.
-     */
-    if (memcmp(mpc5xx_get_vector_addr(except->exceptIndex), (void*)default_raw_except_entry.hdl.raw_hdl,default_raw_except_entry.hdl.raw_hdl_size)) {
-      return 0;
-    }
+  if (!mpc5xx_vector_is_valid(except->exceptIndex)) {
+    return 0;
+  }
+  /*
+   * Check if default handler is actually connected. If not issue an error.
+   * You must first get the current handler via mpc5xx_get_current_exception
+   * and then disconnect it using mpc5xx_delete_exception.
+   * RATIONALE : to always have the same transition by forcing the user
+   * to get the previous handler before accepting to disconnect.
+   */
+  if (exception_handler_table[except->exceptIndex] != 
+      default_raw_except_entry.hdl.raw_hdl) {
+    return 0;
+  }
 
-    _CPU_ISR_Disable(level);
-    
-    raw_except_table [except->exceptIndex] = *except;
-    codemove((void*)mpc5xx_get_vector_addr(except->exceptIndex),
-	     except->hdl.raw_hdl,
-	     except->hdl.raw_hdl_size,
-	     PPC_CACHE_ALIGNMENT);
-    except->on(except);
-    
-    _CPU_ISR_Enable(level);
-    return 1;
+  _CPU_ISR_Disable(level);
+  
+  raw_except_table[except->exceptIndex] = *except;
+
+  exception_handler_table[except->exceptIndex] = except->hdl.raw_hdl;
+  except->on(except);
+  
+  _CPU_ISR_Enable(level);
+  return 1;
 }
 
 int mpc5xx_get_current_exception (rtems_raw_except_connect_data* except)
@@ -119,7 +109,7 @@ int mpc5xx_get_current_exception (rtems_raw_except_connect_data* except)
     return 0;
   }
     
-  *except = raw_except_table [except->exceptIndex];
+  *except = raw_except_table[except->exceptIndex];
     
   return 1;
 }
@@ -138,20 +128,16 @@ int mpc5xx_delete_exception (const rtems_raw_except_connect_data* except)
    * RATIONALE : to always have the same transition by forcing the user
    * to get the previous handler before accepting to disconnect.
    */
-  if (memcmp(mpc5xx_get_vector_addr(except->exceptIndex),
-	     (void*)except->hdl.raw_hdl,
-	     except->hdl.raw_hdl_size)) {
-      return 0;
+  if (exception_handler_table[except->exceptIndex] != except->hdl.raw_hdl) {
+    return 0;
   }
+
   _CPU_ISR_Disable(level);
 
   except->off(except);
-  codemove((void*)mpc5xx_get_vector_addr(except->exceptIndex),
-	   default_raw_except_entry.hdl.raw_hdl,
-	   default_raw_except_entry.hdl.raw_hdl_size,
-	   PPC_CACHE_ALIGNMENT);
-
-    
+  exception_handler_table[except->exceptIndex] = 
+    default_raw_except_entry.hdl.raw_hdl;
+  
   raw_except_table[except->exceptIndex] = default_raw_except_entry;
   raw_except_table[except->exceptIndex].exceptIndex = except->exceptIndex;
 
@@ -162,39 +148,37 @@ int mpc5xx_delete_exception (const rtems_raw_except_connect_data* except)
 
 /*
  * Exception global init.
+ *
+ * Install exception handler pointers from the raw exception table into the
+ * exception handler table.
  */
 int mpc5xx_init_exceptions (rtems_raw_except_global_settings* config)
 {
-    unsigned 			i;
-    unsigned int level;
-    
-    /*
-     * store various accelerators
-     */
-    raw_except_table 		= config->rawExceptHdlTbl;
-    local_settings 		= config;
-    default_raw_except_entry 	= config->defaultRawEntry;
-
-    _CPU_ISR_Disable(level);
-
-    for (i=0; i <= LAST_VALID_EXC; i++) {
-      if (!mpc5xx_vector_is_valid(i)){
-	continue;
-      }
-      codemove((void*)mpc5xx_get_vector_addr(i),
-	     raw_except_table[i].hdl.raw_hdl,
-	     raw_except_table[i].hdl.raw_hdl_size,
-	     PPC_CACHE_ALIGNMENT);
-      if (raw_except_table[i].hdl.raw_hdl != default_raw_except_entry.hdl.raw_hdl) {
-	raw_except_table[i].on(&raw_except_table[i]);
-      }
-      else {
-	raw_except_table[i].off(&raw_except_table[i]);
-      }
+  unsigned 			i;
+  unsigned int level;
+  
+  /*
+   * store various accelerators
+   */
+  raw_except_table 		= config->rawExceptHdlTbl;
+  local_settings 		= config;
+  default_raw_except_entry 	= config->defaultRawEntry;
+
+  _CPU_ISR_Disable(level);
+
+  for (i = 0; i < NUM_EXCEPTIONS; i++) {
+    exception_handler_table[i] = raw_except_table[i].hdl.raw_hdl;
+
+    if (raw_except_table[i].hdl.raw_hdl != default_raw_except_entry.hdl.raw_hdl) {
+      raw_except_table[i].on(&raw_except_table[i]);
+    }
+    else {
+      raw_except_table[i].off(&raw_except_table[i]);
     }
-    _CPU_ISR_Enable(level);
+  }
+  _CPU_ISR_Enable(level);
 
-    return 1;
+  return 1;
 }
 
 int mpc5xx_get_exception_config (rtems_raw_except_global_settings** config)
diff --git a/c/src/lib/libcpu/powerpc/mpc5xx/exceptions/raw_exception.h b/c/src/lib/libcpu/powerpc/mpc5xx/exceptions/raw_exception.h
index 515a84a201..3b7e6783af 100644
--- a/c/src/lib/libcpu/powerpc/mpc5xx/exceptions/raw_exception.h
+++ b/c/src/lib/libcpu/powerpc/mpc5xx/exceptions/raw_exception.h
@@ -2,88 +2,62 @@
  * raw_execption.h
  *
  *	    This file contains implementation of C function to
- *          Instanciate 8xx ppc primary exception entries.
- *	    More detailled information can be found on motorola
- *	    site and more precisely in the following book :
+ *          Instantiate mpc5xx primary exception entries.
+ *	    More detailled information can be found on the Motorola
+ *	    site and more precisely in the following book:
  *
- *		MPC860 
- *		Risc Microporcessor User's Manual
- *		Motorola REF : MPC860UM/AD 07/98 Rev .1
+ *		MPC555/MPC556 User's Manual
+ *		Motorola REF : MPC555UM/D Rev. 3, 2000 October 15
  *
- * Copyright (C) 1999  Eric Valette (valette@crf.canon.fr)
- *                     Canon Centre Recherche France.
  *
- * Changes for MPC5XX Wilfried Busalski (w.busalski@lancier-monitoring.de)
- * Copyright (C) 2003 Lancier Monitoring GmbH
- 
+ *  MPC5xx port sponsored by Defence Research and Development Canada - Suffield
+ *  Copyright (C) 2004, Real-Time Systems Inc. (querbach@realtime.bc.ca)
+ *
+ *  Derived from libcpu/powerpc/mpc8xx/exceptions/raw_exception.h:
+ *
+ *  Copyright (C) 1999  Eric Valette (valette@crf.canon.fr)
+ *                     Canon Centre Recherche France.
  *
  *  The license and distribution terms for this file may be
  *  found in found in the file LICENSE in this distribution or at
- *  http://www.OARcorp.com/rtems/license.html.
+ *  http://www.rtems.com/license/LICENSE.
  *
- * raw_exception.h,v 1.1 2001/04/06 15:54:18 joel Exp
+ *  $Id$
  */
 
 #ifndef _LIBCPU_MPC5XX_EXCEPTION_RAW_EXCEPTION_H
 #define _LIBCPU_MPC5XX_EXCEPTION_RAW_EXCEPTION_H
 
+#include <libcpu/vectors.h>
+
 /*
- * Exception Vectors as defined in the MCP750 manual
+ * Exception Vectors as defined in the MPC555 User's Manual
  */
 
-#define	ASM_RESET_VECTOR 		0x01
-#define	ASM_MACH_VECTOR			0x02
-#define	ASM_PROT_VECTOR			0x03
-#define	ASM_ISI_VECTOR 			0x04
-#define	ASM_EXT_VECTOR 			0x05
-#define	ASM_ALIGN_VECTOR 		0x06
-#define	ASM_PROG_VECTOR			0x07
-#define	ASM_FLOAT_VECTOR		0x08
-#define	ASM_DEC_VECTOR			0x09
-
-#define	ASM_SYS_VECTOR			0x0C
-#define	ASM_TRACE_VECTOR		0x0D
-#define	ASM_FLOATASSIST_VECTOR	0x0E
-
-#define	ASM_SOFTEMUL_VECTOR		0x10
+#define	ASM_RESET_VECTOR 	0x01
+#define	ASM_MACH_VECTOR		0x02
 
-#define	ASM_ITLBERROR_VECTOR	0x13
-#define	ASM_DTLBERROR_VECTOR	0x14
+#define	ASM_EXT_VECTOR 		0x05
+#define	ASM_ALIGN_VECTOR 	0x06
+#define	ASM_PROG_VECTOR		0x07
+#define	ASM_FLOAT_VECTOR	0x08
+#define	ASM_DEC_VECTOR		0x09
 
-#define ASM_DBREAK_VECTOR		0x1C
-#define ASM_IBREAK_VECTOR		0x1D
-#define ASM_PERIFBREAK_VECTOR	0x1E
-#define ASM_DEVPORT_VECTOR		0x1F
-
-#define LAST_VALID_EXC		ASM_DEVPORT_VECTOR
-
-/*
- * Vector offsets as defined in the MPC860 manual
- */
-
-#define	ASM_RESET_VECTOR_OFFSET 		(ASM_RESET_VECTOR << 8)
-#define	ASM_MACH_VECTOR_OFFSET 			(ASM_MACH_VECTOR  << 8)
-#define	ASM_PROT_VECTOR_OFFSET 			(ASM_PROT_VECTOR  << 8)
-#define	ASM_ISI_VECTOR_OFFSET 			(ASM_ISI_VECTOR   << 8)
-#define	ASM_EXT_VECTOR_OFFSET 			(ASM_EXT_VECTOR   << 8)
-#define	ASM_ALIGN_VECTOR_OFFSET 		(ASM_ALIGN_VECTOR << 8)
-#define	ASM_PROG_VECTOR_OFFSET 			(ASM_PROG_VECTOR  << 8)
-#define	ASM_FLOAT_VECTOR_OFFSET			(ASM_FLOAT_VECTOR << 8)
-#define	ASM_DEC_VECTOR_OFFSET			(ASM_DEC_VECTOR   << 8)
+#define	ASM_SYS_VECTOR		0x0C
+#define	ASM_TRACE_VECTOR	0x0D
+#define	ASM_FLOATASSIST_VECTOR	0x0E
 
-#define	ASM_SYS_VECTOR_OFFSET			(ASM_SYS_VECTOR   << 8)
-#define	ASM_TRACE_VECTOR_OFFSET			(ASM_TRACE_VECTOR << 8)
-#define	ASM_FLOATASSIST_VECTOR_OFFSET	(ASM_FLOATASSIST_VECTOR << 8)
+#define	ASM_SOFTEMUL_VECTOR	0x10
 
-#define	ASM_SOFTEMUL_VECTOR_OFFSET		(ASM_SOFTEMUL_VECTOR << 8)
+#define	ASM_IPROT_VECTOR	0x13
+#define	ASM_DPROT_VECTOR	0x14
 
-#define	ASM_ITLBERROR_VECTOR_OFFSET		(ASM_ITLBERROR_VECTOR << 8)
-#define	ASM_DTLBERROR_VECTOR_OFFSET		(ASM_DTLBERROR_VECTOR << 8)
+#define ASM_DBREAK_VECTOR	0x1C
+#define ASM_IBREAK_VECTOR	0x1D
+#define ASM_MEBREAK_VECTOR	0x1E
+#define ASM_NMEBREAK_VECTOR	0x1F
 
-#define ASM_DBREAK_VECTOR_OFFSET		(ASM_DBREAK_VECTOR << 8)
-#define ASM_IBREAK_VECTOR_OFFSET		(ASM_IBREAK_VECTOR << 8)
-#define ASM_PERIFBREAK_VECTOR_OFFSET	(ASM_PERIFBREAK_VECTOR << 8)
-#define ASM_DEVPORT_VECTOR_OFFSET		(ASM_DEVPORT_VECTOR_OFFSET << 8)
+#define LAST_VALID_EXC		ASM_NMEBREAK_VECTOR
 
 #ifndef ASM
 
@@ -93,13 +67,11 @@
 
 typedef unsigned char  rtems_vector;
 struct 	__rtems_raw_except_connect_data__;
-typedef void 		(*rtems_raw_except_func)		(void);
 typedef unsigned char 	rtems_raw_except_hdl_size;
 
 typedef struct {
   rtems_vector			vector;
-  rtems_raw_except_func		raw_hdl;
-  rtems_raw_except_hdl_size	raw_hdl_size;
+  rtems_exception_handler_t*	raw_hdl;
 }rtems_raw_except_hdl;
   
 typedef void (*rtems_raw_except_enable)		(const struct __rtems_raw_except_connect_data__*);
@@ -186,5 +158,7 @@ extern int mpc5xx_get_exception_config (rtems_raw_except_global_settings** confi
 
 # endif /* ASM */
 
+#define SIZEOF_
+
 #endif
 
diff --git a/c/src/lib/libcpu/powerpc/mpc5xx/include/console.h b/c/src/lib/libcpu/powerpc/mpc5xx/include/console.h
new file mode 100644
index 0000000000..83dbe8b7f3
--- /dev/null
+++ b/c/src/lib/libcpu/powerpc/mpc5xx/include/console.h
@@ -0,0 +1,37 @@
+/*
+ *  Console declarations
+ *
+ *
+ *  MPC5xx port sponsored by Defence Research and Development Canada - Suffield
+ *  Copyright (C) 2004, Real-Time Systems Inc. (querbach@realtime.bc.ca)
+ *
+ *  The license and distribution terms for this file may be
+ *  found in found in the file LICENSE in this distribution or at
+ *  http://www.rtems.com/license/LICENSE.
+ *  
+ *  $Id$
+ */
+
+#ifndef _M5xx_CONSOLE_H_
+#define _M5xx_CONSOLE_H_
+
+#include <rtems/libio.h>
+#include <rtems/termiostypes.h>
+
+void m5xx_uart_reserve_resources(rtems_configuration_table *configuration);
+void m5xx_uart_initialize(int minor);
+
+/* Termios callbacks */
+int m5xx_uart_firstOpen(int maj, int min, void *arg);
+int m5xx_uart_lastClose(int maj, int min, void *arg);
+int m5xx_uart_pollRead(int minor);
+int m5xx_uart_pollWrite(int minor, const char* buf, int len);
+int m5xx_uart_write(int minor, const char *buf, int len);
+int m5xx_uart_setAttributes(int, const struct termios* t);
+
+#define NUM_PORTS	2	/* number of serial ports */
+
+#define SCI1_MINOR	0
+#define SCI2_MINOR	1
+
+#endif /* _M5xx_CONSOLE_H_ */
diff --git a/c/src/lib/libcpu/powerpc/mpc5xx/include/mpc5xx.h b/c/src/lib/libcpu/powerpc/mpc5xx/include/mpc5xx.h
new file mode 100644
index 0000000000..2ec40702ea
--- /dev/null
+++ b/c/src/lib/libcpu/powerpc/mpc5xx/include/mpc5xx.h
@@ -0,0 +1,621 @@
+/*
+ * mpc5xx.h
+ *
+ * MPC5xx Internal I/O Definitions
+ *
+ *
+ *  MPC5xx port sponsored by Defence Research and Development Canada - Suffield
+ *  Copyright (C) 2004, Real-Time Systems Inc. (querbach@realtime.bc.ca)
+ *
+ *  Derived from c/src/lib/libcpu/powerpc/mpc8xx/include/mpc8xx.h:
+ *
+ *  Submitted By:                                                        *
+ *                                                                       *
+ *      W. Eric Norum                                                    *
+ *      Saskatchewan Accelerator Laboratory                              *
+ *      University of Saskatchewan                                       *
+ *      107 North Road                                                   *
+ *      Saskatoon, Saskatchewan, CANADA                                  *
+ *      S7N 5C6                                                          *
+ *                                                                       *
+ *      eric@skatter.usask.ca                                            *
+ *                                                                       *
+ *  Modified for use with the MPC860 (original code was for MC68360)     *
+ *  by                                                                   *
+ *      Jay Monkman                                                      *
+ *      Frasca International, Inc.                                       *
+ *      906 E. Airport Rd.                                               *
+ *      Urbana, IL, 61801                                                *
+ *                                                                       *
+ *      jmonkman@frasca.com                                              *
+ *                                                                       *
+ *  Modified further for use with the MPC821 by:                         *
+ *      Andrew Bray <andy@chaos.org.uk>                                  *
+ *                                                                       *
+ *  With some corrections/additions by:                                  *
+ *      Darlene A. Stewart and                                           *
+ *      Charles-Antoine Gauthier                                         *
+ *      Institute for Information Technology                             *
+ *      National Research Council of Canada                              *
+ *      Ottawa, ON  K1A 0R6                                              *
+ *                                                                       *
+ *      Darlene.Stewart@iit.nrc.ca                                       *
+ *      charles.gauthier@iit.nrc.ca                                      *
+ *                                                                       *
+ *      Corrections/additions:                                           *
+ *        Copyright (c) 1999, National Research Council of Canada        *
+ *  
+ *  MPC5xx port sponsored by Defence Research and Development Canada - Suffield
+ *  Copyright (C) 2004, Real-Time Systems Inc. (querbach@realtime.bc.ca)
+ *
+ *  The license and distribution terms for this file may be
+ *  found in found in the file LICENSE in this distribution or at
+ *  http://www.rtems.com/license/LICENSE.
+ *
+ *  $Id$
+ */
+
+#ifndef _MPC5xx_h
+#define _MPC5xx_h
+
+#include <libcpu/spr.h>
+
+
+#ifndef ASM
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * Macros for accessing Special Purpose Registers (SPRs)
+ */
+
+#define _eieio   __asm__ volatile ("eieio\n"::)
+#define _sync    __asm__ volatile ("sync\n"::)
+#define _isync   __asm__ volatile ("isync\n"::)
+
+/*
+ * Core Registers (SPRs)
+ */
+#define DER             149     /* Debug Enable Register */
+#define IMMR            638     /* Internal Memory Map Register */
+#define IMMR_FLEN	(1<<11)	   /* Internal flash ROM enabled */
+
+/*
+ * Interrupt Control Registers (SPRs)
+ */
+#define EIE              80     /* External Interrupt Enable Register */
+#define EID              81     /* External Interrupt Disable Register */
+#define NRI              82     /* Non-Recoverable Interrupt Register */
+
+#define ECR             148     /* Exception Cause Register */
+
+/*
+ * Bus Control Registers (SPRs)
+ */
+#define LCTRL1          156     /* L-Bus Support Control Register 1 */
+#define LCTRL2          157     /* L-Bus Support Control Register 2 */
+#define ICTRL           158     /* I-Bus Support Control Register */
+
+/*
+ * Burst Buffer Control Registers (SPRs)
+ */
+#define BBCMCR          560     /* Burst Buffer Configuration Register */
+#define BBCMCR_BE       (1<<13) /* Burst enable */
+#define BBCMCR_ETRE     (1<<12) /* Exception table relocation enable */
+
+#define MI_RBA0         784     /* Region 0 Address Register */
+#define MI_RBA1         785     /* Region 1 Address Register */
+#define MI_RBA2         786     /* Region 2 Address Register */
+#define MI_RBA3         787     /* Region 3 Address Register */
+
+#define MI_RA0          816     /* Region 0 Attribute Register */
+#define MI_RA1          817     /* Region 1 Attribute Register */
+#define MI_RA2          818     /* Region 2 Attribute Register */
+#define MI_RA3          819     /* Region 3 Attribute Register */
+#define MI_GRA          528     /* Region Global Attribute Register */
+#define MI_RA_PP	(3 << 10)	/* Protection bits: */
+#define MI_RA_PP_SUPV	(1 << 10)	/*   Supervisor */
+#define MI_RA_PP_USER	(2 << 10)	/*   User */
+#define MI_RA_G		(1 << 6)	/* Guarded region */
+
+
+/*
+ * L-Bus to U-Bus Interface (L2U) Registers (SPRs)
+ */
+#define L2U_MCR         568     /* L2U Module Configuration Register */
+
+#define L2U_RBA0        792     /* L2U Region 0 Address Register */
+#define L2U_RBA1        793     /* L2U Region 1 Address Register */
+#define L2U_RBA2        794     /* L2U Region 2 Address Register */
+#define L2U_RBA3        795     /* L2U Region 3 Address Register */
+
+#define L2U_RA0         824     /* L2U Region 0 Attribute Register */
+#define L2U_RA1         825     /* L2U Region 1 Attribute Register */
+#define L2U_RA2         826     /* L2U Region 2 Attribute Register */
+#define L2U_RA3         827     /* L2U Region 3 Attribute Register */
+#define L2U_GRA         536     /* L2U Global Region Attribute Register */
+#define L2U_RA_PP	(3 << 10)	/* Protection bits: */
+#define L2U_RA_PP_SUPV	(1 << 10)	/*   Supervisor */
+#define L2U_RA_PP_USER	(2 << 10)	/*   User */
+#define L2U_RA_G	(1 << 6)	/* Guarded region */
+
+
+/*
+ *************************************************************************
+ *                         REGISTER SUBBLOCKS                            *
+ *************************************************************************
+ */
+
+/*
+ *************************************************************************
+ *                 System Protection Control Register (SYPCR)            *
+ *************************************************************************
+ */
+#define USIU_SYPCR_SWTC(x)      ((x)<<16)   /* Software watchdog timer count */
+#define USIU_SYPCR_BMT(x)       ((x)<<8)    /* Bus monitor timing */
+#define USIU_SYPCR_BME          (1<<7)      /* Bus monitor enable */
+#define USIU_SYPCR_SWF          (1<<3)      /* Software watchdog freeze */
+#define USIU_SYPCR_SWE          (1<<2)      /* Software watchdog enable */
+#define USIU_SYPCR_SWRI         (1<<1)      /* Watchdog reset/interrupt sel. */
+#define USIU_SYPCR_SWP          (1<<0)      /* Software watchdog prescale */
+
+#define USIU_SYPCR_BMT(x)       ((x)<<8)    /* Bus monitor timing */
+#define USIU_SYPCR_BME          (1<<7)      /* Bus monitor enable */
+#define USIU_SYPCR_SWF          (1<<3)      /* Software watchdog freeze */
+#define USIU_SYPCR_SWE          (1<<2)      /* Software watchdog enable */
+#define USIU_SYPCR_SWRI         (1<<1)      /* Watchdog reset/interrupt sel. */
+#define USIU_SYPCR_SWP          (1<<0)      /* Software watchdog prescale */
+
+/*
+ *************************************************************************
+ *                 Software Service Register (SWSR)                      *
+ *************************************************************************
+ */
+#define TICKLE_WATCHDOG()		\
+do {					\
+  usiu.swsr = 0x556C;			\
+  usiu.swsr = 0xAA39;			\
+} while (0)				\
+
+/*
+ *************************************************************************
+ *                        Memory Control Registers                       *
+ *************************************************************************
+ */
+#define USIU_MEMC_BR_BA(x)      (((rtems_unsigned32)x)&0xffff8000)
+					 /* Base address */
+#define USIU_MEMC_BR_AT(x)      ((x)<<12) /* Address type */
+#define USIU_MEMC_BR_PS8        (1<<10)  /* 8 bit port */
+#define USIU_MEMC_BR_PS16       (2<<10)  /* 16 bit port */
+#define USIU_MEMC_BR_PS32       (0<<10)  /* 32 bit port */
+#define USIU_MEMC_BR_WP         (1<<8)   /* Write protect */
+#define USIU_MEMC_BR_WEBS       (1<<5)   /* Write enable/byte select */
+#define USIU_MEMC_BR_TBDIP      (1<<4)   /* Toggle-Burst data in progress*/
+#define USIU_MEMC_BR_LBDIP      (1<<3)   /* Late-burst data in progress */
+#define USIU_MEMC_BR_SETA       (1<<2)   /* External transfer acknowledge */
+#define USIU_MEMC_BR_BI         (1<<1)   /* Burst inhibit */
+#define USIU_MEMC_BR_V          (1<<0)   /* Base/Option register are valid */
+
+#define USIU_MEMC_OR_32K        0xffff8000      /* Address range */
+#define USIU_MEMC_OR_64K        0xffff0000
+#define USIU_MEMC_OR_128K       0xfffe0000
+#define USIU_MEMC_OR_256K       0xfffc0000
+#define USIU_MEMC_OR_512K       0xfff80000
+#define USIU_MEMC_OR_1M         0xfff00000
+#define USIU_MEMC_OR_2M         0xffe00000
+#define USIU_MEMC_OR_4M         0xffc00000
+#define USIU_MEMC_OR_8M         0xff800000
+#define USIU_MEMC_OR_16M        0xff000000
+#define USIU_MEMC_OR_32M        0xfe000000
+#define USIU_MEMC_OR_64M        0xfc000000
+#define USIU_MEMC_OR_128        0xf8000000
+#define USIU_MEMC_OR_256M       0xf0000000
+#define USIU_MEMC_OR_512M       0xe0000000
+#define USIU_MEMC_OR_1G         0xc0000000
+#define USIU_MEMC_OR_2G         0x80000000
+#define USIU_MEMC_OR_4G         0x00000000
+#define USIU_MEMC_OR_ATM(x)     ((x)<<12)   /* Address type mask */
+#define USIU_MEMC_OR_CSNT       (1<<11)     /* Chip select is negated early */
+#define USIU_MEMC_OR_ACS_NORM   (0<<9)      /* *CS asserted with addr lines */
+#define USIU_MEMC_OR_ACS_QRTR   (2<<9)      /* *CS asserted 1/4 after addr */
+#define USIU_MEMC_OR_ACS_HALF   (3<<9)      /* *CS asserted 1/2 after addr */
+#define USIU_MEMC_OR_ETHR       (1<<8)      /* Extended hold time on reads */
+#define USIU_MEMC_OR_SCY(x)     ((x)<<4)    /* Cycle length in clocks */
+#define USIU_MEMC_OR_BSCY(x)    ((x)<<1)    /* Burst beat length in clocks */
+#define USIU_MEMC_OR_TRLX       (1<<0)      /* Relaxed timing in GPCM */
+
+/*
+ *************************************************************************
+ *                      Clocks and Reset Controlmer                      *
+ *************************************************************************
+ */
+
+#define USIU_SCCR_DBCT          (1<<31)    /* Disable backup clock for timers */
+#define USIU_SCCR_COM(x)	((x)<<29)  /* Clock output mode */
+#define USIU_SCCR_RTDIV         (1<<24)    /* RTC, PIT divide by 256, not 4 */
+#define USIU_PRQEN              (1<<21)    /* MSR[POW] controls frequency */
+#define USIU_SCCR_EBDF(x)       ((x)<<17)  /* External bus division factor */
+#define USIU_LME                (1<<16)    /* Enable limp mode */
+#define USIU_ENGDIV(x)          ((x)<<9)   /* Set engineering clock divisor */
+
+#define USIU_PLPRCR_MF(x)	(((x)-1)<<20)	/* PLL mult. factor (true) */
+#define USIU_PLPRCR_SPLS        (1<<16)    /* System PLL locked */
+#define	USIU_PLPRCR_TEXPS	(1<<14)    /* Assert TEXP always */
+
+/*
+ *************************************************************************
+ *                      Programmable Interval Timer                      *
+ *************************************************************************
+ */
+#define USIU_PISCR_PIRQ(x)      (1<<(15-x))  /* PIT interrupt level */
+#define USIU_PISCR_PS           (1<<7)    /* PIT Interrupt state */
+#define USIU_PISCR_PIE          (1<<2)    /* PIT interrupt enable */
+#define USIU_PISCR_PITF         (1<<1)    /* Stop timer when freeze asserted */
+#define USIU_PISCR_PTE          (1<<0)    /* PIT enable */
+
+/*
+ *************************************************************************
+ *                             Time Base                                 *
+ *************************************************************************
+ */
+#define USIU_TBSCR_TBIRQ(x)     (1<<(15-x))  /* TB interrupt level */
+#define USIU_TBSCR_REFA         (1<<7)    /* TB matches TBREFF0 */
+#define USIU_TBSCR_REFB         (1<<6)    /* TB matches TBREFF1 */
+#define USIU_TBSCR_REFAE        (1<<3)    /* Enable ints for REFA */
+#define USIU_TBSCR_REFBE        (1<<2)    /* Enable ints for REFB */
+#define USIU_TBSCR_TBF          (1<<1)    /* TB stops on FREEZE */
+#define USIU_TBSCR_TBE          (1<<0)    /* enable TB and decrementer */
+
+/*
+ *************************************************************************
+ *                       SIU Interrupt Mask                              *
+ *************************************************************************
+ */
+#define USIU_SIMASK_IRM0        (1<<31)
+#define USIU_SIMASK_LVM0        (1<<30)
+#define USIU_SIMASK_IRM1        (1<<29)
+#define USIU_SIMASK_LVM1        (1<<28)
+#define USIU_SIMASK_IRM2        (1<<27)
+#define USIU_SIMASK_LVM2        (1<<26)
+#define USIU_SIMASK_IRM3        (1<<25)
+#define USIU_SIMASK_LVM3        (1<<24)
+#define USIU_SIMASK_IRM4        (1<<23)
+#define USIU_SIMASK_LVM4        (1<<22)
+#define USIU_SIMASK_IRM5        (1<<21)
+#define USIU_SIMASK_LVM5        (1<<20)
+#define USIU_SIMASK_IRM6        (1<<19)
+#define USIU_SIMASK_LVM6        (1<<18)
+#define USIU_SIMASK_IRM7        (1<<17)
+#define USIU_SIMASK_LVM7        (1<<16)
+
+/*
+ *************************************************************************
+ *                       SIU Module Control                              *
+ *************************************************************************
+ */
+#define USIU_SIUMCR_EARB        (1<<31)
+#define USIU_SIUMCR_EARP0       (0<<28)
+#define USIU_SIUMCR_EARP1       (1<<28)
+#define USIU_SIUMCR_EARP2       (2<<28)
+#define USIU_SIUMCR_EARP3       (3<<28)
+#define USIU_SIUMCR_EARP4       (4<<28)
+#define USIU_SIUMCR_EARP5       (5<<28)
+#define USIU_SIUMCR_EARP6       (6<<28)
+#define USIU_SIUMCR_EARP7       (7<<28)
+#define USIU_SIUMCR_DSHW        (1<<23)
+#define USIU_SIUMCR_DBGC0       (0<<21)
+#define USIU_SIUMCR_DBGC1       (1<<21)
+#define USIU_SIUMCR_DBGC2       (2<<21)
+#define USIU_SIUMCR_DBGC3       (3<<21)
+#define USIU_SIUMCR_DBPC        (1<<20)
+#define USIU_SIUMCR_ATWC        (1<<19)
+#define USIU_SIUMCR_GPC0        (0<<17)
+#define USIU_SIUMCR_GPC1        (1<<17)
+#define USIU_SIUMCR_GPC2        (2<<17)
+#define USIU_SIUMCR_GPC3        (3<<17)
+#define USIU_SIUMCR_DLK         (1<<16)
+#define USIU_SIUMCR_SC0         (0<<13)
+#define USIU_SIUMCR_SC1         (1<<13)
+#define USIU_SIUMCR_SC2         (2<<13)
+#define USIU_SIUMCR_SC3         (3<<13)
+#define USIU_SIUMCR_RCTX        (1<<12)
+#define USIU_SIUMCR_MLRC0       (0<<10)
+#define USIU_SIUMCR_MLRC1       (1<<10)
+#define USIU_SIUMCR_MLRC2       (2<<10)
+#define USIU_SIUMCR_MLRC3       (3<<10)
+#define USIU_SIUMCR_MTSC        (1<<7)
+
+/*
+ *  Value to write to a key register to unlock the corresponding SIU register
+ */
+#define USIU_UNLOCK_KEY         0x55CCAA33
+
+/*
+ *************************************************************************
+ *                       UIMB Module Control                             *
+ *************************************************************************
+ */
+#define UIMB_UMCR_STOP          (1<<31)
+#define UIMB_UMCR_IRQMUX(x)     ((x)<<29)
+#define UIMB_UMCR_HSPEED        (1<<28)
+ 
+/*
+ *************************************************************************
+ *              QSMCM Serial Communications Interface (SCI)              *
+ *************************************************************************
+ */
+ 
+ 
+#define QSMCM_ILDSCI(x)        ((x)<<8)    /* SCI interrupt level */
+
+#define QSMCM_SCI_BAUD(x)      ((x)&0x1FFF) /* Baud rate field */
+
+#define QSMCM_SCI_LOOPS        (1<<14)     /* Loopback test mode */
+#define QSMCM_SCI_WOMS         (1<<13)     /* Wire-or mode select */
+#define QSMCM_SCI_ILT          (1<<12)     /* Idle-line detect type */
+#define QSMCM_SCI_PT           (1<<11)     /* Parity type */
+#define QSMCM_SCI_PE           (1<<10)     /* Parity enable */
+#define QSMCM_SCI_M            (1<<9)      /* 11-bit mode */
+#define QSMCM_SCI_WAKE         (1<<8)      /* Wakeup mode */
+
+#define QSMCM_SCI_TIE          (1<<7)      /* Transmitter interrupt enable */
+#define QSMCM_SCI_TCIE         (1<<6)      /* Transmit complete intr. enable */
+#define QSMCM_SCI_RIE          (1<<5)      /* Receiver interrupt enable */
+#define QSMCM_SCI_ILIE         (1<<4)      /* Idle line interrupt enable */
+#define QSMCM_SCI_TE           (1<<3)      /* Transmitter enable */
+#define QSMCM_SCI_RE           (1<<2)      /* Receiver enable */
+#define QSMCM_SCI_RWU          (1<<1)      /* Receiver wake-up enable */
+#define QSMCM_SCI_SBK          (1<<0)      /* Send break */
+
+#define QSMCM_SCI_TDRE         (1<<8)      /* Transmit data register empty */
+#define QSMCM_SCI_TC           (1<<7)      /* Transmit complete */
+#define QSMCM_SCI_RDRF         (1<<6)      /* Receive data register full */
+#define QSMCM_SCI_RAF          (1<<5)      /* Receiver active flag */
+#define QSMCM_SCI_IDLE         (1<<4)      /* Idle line detected */
+#define QSMCM_SCI_OR           (1<<3)      /* Receiver overrun error */
+#define QSMCM_SCI_NF           (1<<2)      /* Receiver noise error flag */
+#define QSMCM_SCI_FE           (1<<1)      /* Receiver framing error */
+#define QSMCM_SCI_PF           (1<<0)      /* Receiver parity error */
+
+/*
+ *************************************************************************
+ *   Unified System Interface Unit                                       *
+ *************************************************************************
+ */
+
+/*
+ * Memory controller registers
+ */
+typedef struct m5xxMEMCRegisters_ {
+  rtems_unsigned32        _br;
+  rtems_unsigned32        _or;    /* Used to be called 'or'; reserved ANSI C++ keyword */
+} m5xxMEMCRegisters_t;
+
+/*
+ * USIU itself
+ */
+typedef struct usiu_ {
+  /*
+   * SIU Block
+   */
+  rtems_unsigned32      siumcr;
+  rtems_unsigned32      sypcr;
+  rtems_unsigned32      _pad70;
+  rtems_unsigned16      _pad0;
+  rtems_unsigned16      swsr;
+  rtems_unsigned32      sipend;
+  rtems_unsigned32      simask;
+  rtems_unsigned32      siel;
+  rtems_unsigned32      sivec;
+  rtems_unsigned32      tesr;
+  rtems_unsigned32      sgpiodt1;
+  rtems_unsigned32      sgpiodt2;
+  rtems_unsigned32      sgpiocr;
+  rtems_unsigned32      emcr;
+  rtems_unsigned8	_pad71[0x03C-0x034];
+  rtems_unsigned32      pdmcr;
+  rtems_unsigned8       _pad2[0x100-0x40];
+  
+  /*
+   * MEMC Block
+   */
+  m5xxMEMCRegisters_t   memc[4];
+  rtems_unsigned8       _pad7[0x140-0x120];
+  rtems_unsigned32      dmbr;
+  rtems_unsigned32      dmor;
+  rtems_unsigned8       _pad8[0x178-0x148];
+  rtems_unsigned16      mstat;
+  rtems_unsigned8       _pad9[0x200-0x17A];
+  
+  /*
+   * System integration timers
+   */
+  rtems_unsigned16      tbscr;
+  rtems_unsigned16      _pad10;
+  rtems_unsigned32      tbreff0;
+  rtems_unsigned32      tbreff1;
+  rtems_unsigned8       _pad11[0x220-0x20c];
+  rtems_unsigned16      rtcsc;
+  rtems_unsigned16      _pad12;
+  rtems_unsigned32      rtc;
+  rtems_unsigned32      rtsec;
+  rtems_unsigned32      rtcal;
+  rtems_unsigned32      _pad13[4];
+  rtems_unsigned16      piscr;
+  rtems_unsigned16      _pad14;
+  rtems_unsigned16      pitc;
+  rtems_unsigned16      _pad_14_1;
+  rtems_unsigned16      pitr;
+  rtems_unsigned16      _pad_14_2;
+  rtems_unsigned8       _pad15[0x280-0x24c];
+  
+  /*
+   * Clocks and Reset
+   */
+  rtems_unsigned32      sccr;
+  rtems_unsigned32      plprcr;
+  rtems_unsigned16      rsr;
+  rtems_unsigned16	_pad72;
+  rtems_unsigned16	colir;
+  rtems_unsigned16	_pad73;
+  rtems_unsigned16	vsrmcr;
+  rtems_unsigned8       _pad16[0x300-0x292];
+  
+  /*
+   * System integration timers keys
+   */
+  rtems_unsigned32      tbscrk;
+  rtems_unsigned32      tbreff0k;
+  rtems_unsigned32      tbreff1k;
+  rtems_unsigned32      tbk;
+  rtems_unsigned32      _pad17[4];
+  rtems_unsigned32      rtcsk;
+  rtems_unsigned32      rtck;
+  rtems_unsigned32      rtseck;
+  rtems_unsigned32      rtcalk;
+  rtems_unsigned32      _pad18[4];
+  rtems_unsigned32      piscrk;
+  rtems_unsigned32      pitck;
+  rtems_unsigned8       _pad19[0x380-0x348];
+  
+  /*
+   * Clocks and Reset Keys
+   */
+  rtems_unsigned32      sccrk;
+  rtems_unsigned32      plprck;
+  rtems_unsigned32      rsrk;
+  rtems_unsigned8       _pad20[0x400-0x38c];
+} usiu_t;
+
+extern volatile usiu_t usiu;	/* defined in linkcmds */
+
+/*
+ *************************************************************************
+ *   Inter-Module Bus and Devices                                        *
+ *************************************************************************
+ */
+
+/*
+ * Dual-Port TPU RAM (DPTRAM)
+ */
+typedef struct m5xxDPTRAMRegisters_ {
+  rtems_unsigned8	pad[0x4000];		/* define later */
+} m5xxDPTRAMRegisters_t;
+
+/*
+ * Time Processor Unit (TPU)
+ */
+typedef struct m5xxTPU3Registers_ {
+  rtems_unsigned8	pad[0x400];		/* define later */
+} m5xxTPU3Registers_t;
+
+/*
+ * Queued A/D Converter (QADC)
+ */
+typedef struct m5xxQADC64Registers_ {
+  rtems_unsigned8	pad[0x400];		/* define later */
+} m5xxQADC64Registers_t;
+
+/*
+ * Serial Communications Interface (SCI)
+ */
+typedef struct m5xxSCIRegisters_ {
+  rtems_unsigned16        sccr0;
+  rtems_unsigned16        sccr1;
+  rtems_unsigned16        scsr;
+  rtems_unsigned16        scdr;
+} m5xxSCIRegisters_t;
+
+/*
+ * Serial Peripheral Interface (SPI)
+ */
+typedef struct m5xxSPIRegisters_ {
+  rtems_unsigned16        spcr0;
+  rtems_unsigned16        spcr1;
+  rtems_unsigned16        spcr2;
+  rtems_unsigned8         spcr3;
+  rtems_unsigned8         spsr;
+} m5xxSPIRegisters_t;
+
+/*
+ * Queued Serial Multi-Channel Module (QSMCM)
+ */ 
+typedef struct m5xxQSMCMRegisters_ {
+  rtems_unsigned16      qsmcmmcr;
+  rtems_unsigned16      qtest;
+  rtems_unsigned16      qdsci_il;
+  rtems_unsigned16      qspi_il;
+
+  m5xxSCIRegisters_t    sci1;
+
+  rtems_unsigned8       _pad10[0x14-0x10];
+
+  rtems_unsigned16      portqs;
+  rtems_unsigned16      pqspar;
+  m5xxSPIRegisters_t    spi;
+
+  m5xxSCIRegisters_t    sci2;
+
+  rtems_unsigned16      qsci1cr;
+  rtems_unsigned16      qsci1sr;
+  rtems_unsigned16      sctq[0x10];
+  rtems_unsigned16      scrq[0x10];
+
+  rtems_unsigned8       _pad6C[0x140-0x06C];
+
+  rtems_unsigned16      recram[0x20];
+  rtems_unsigned16      tranram[0x20];
+  rtems_unsigned16      comdram[0x20];
+} m5xxQSMCMRegisters_t;
+
+/*
+ * Modular Input/Output System (MIOS)
+ */
+typedef struct m5xxMIOS1Registers_ {
+  rtems_unsigned8	pad[0x1000];		/* define later */
+} m5xxMIOS1Registers_t;
+
+/*
+ * Can 2.0B Controller (TouCAN)
+ */
+typedef struct m5xxTouCANRegisters_ {
+  rtems_unsigned8	pad[0x400];		/* define later */
+} m5xxTouCANRegisters_t;
+
+/*
+ * U-Bus to IMB3 Bus Interface Module (UIMB)
+ */
+typedef struct m5xxUIMBRegisters_ {
+  rtems_unsigned32      umcr;
+  rtems_unsigned32      utstcreg;
+  rtems_unsigned32      uipend;
+} m5xxUIMBRegisters_t;
+
+/*
+ * IMB itself
+ */
+typedef struct imb_ {
+  m5xxDPTRAMRegisters_t	dptram;
+  m5xxTPU3Registers_t	tpu[2];
+  m5xxQADC64Registers_t	qadc[2];
+  m5xxQSMCMRegisters_t	qsmcm;
+  rtems_unsigned8       _pad5200[0x6000-0x5200];
+  m5xxMIOS1Registers_t	mios;
+  m5xxTouCANRegisters_t	toucan[2];
+  rtems_unsigned8       _pad7800[0x7F80-0x7800];
+  m5xxUIMBRegisters_t	uimb;
+} imb_t;
+
+extern volatile imb_t imb;		/* defined in linkcmds */
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* ASM */
+
+#endif /* _MPC5xx_h */
+
diff --git a/c/src/lib/libcpu/powerpc/mpc5xx/irq/irq.c b/c/src/lib/libcpu/powerpc/mpc5xx/irq/irq.c
new file mode 100644
index 0000000000..40bf8341bc
--- /dev/null
+++ b/c/src/lib/libcpu/powerpc/mpc5xx/irq/irq.c
@@ -0,0 +1,495 @@
+/*
+ * irq.c
+ *
+ *  This file contains the implementation of the function described in irq.h
+ *
+ *  MPC5xx port sponsored by Defence Research and Development Canada - Suffield
+ *  Copyright (C) 2004, Real-Time Systems Inc. (querbach@realtime.bc.ca)
+ *
+ *  Derived from libbsp/powerpc/mbx8xx/irq/irq.c:
+ *
+ *  Copyright (C) 1998, 1999 valette@crf.canon.fr
+ *
+ *  The license and distribution terms for this file may be
+ *  found in found in the file LICENSE in this distribution or at
+ *  http://www.rtems.com/license/LICENSE.
+ *
+ *  $Id$
+ */
+  
+#include <rtems.h>
+#include <rtems/score/apiext.h>
+#include <mpc5xx.h>
+#include <libcpu/vectors.h>
+#include <libcpu/raw_exception.h>
+#include <libcpu/irq.h>
+
+/*
+ * Convert an rtems_irq_symbolic_name constant to an interrupt level
+ * suitable for programming into an I/O device's interrupt level field.
+ */
+ 
+int CPU_irq_level_from_symbolic_name(const rtems_irq_symbolic_name name)
+{
+  if (CPU_USIU_EXT_IRQ_0 <= name && name <= CPU_USIU_INT_IRQ_7)
+    return (name - CPU_USIU_EXT_IRQ_0) / 2;
+    
+  if (CPU_UIMB_IRQ_8 <= name && name <= CPU_UIMB_IRQ_31)
+    return 8 + (name - CPU_UIMB_IRQ_8);
+
+  return 31;			/* reasonable default */
+}
+
+/*
+ * default handler connected on each irq after bsp initialization
+ */
+static rtems_irq_connect_data		default_rtems_entry;
+
+/*
+ * location used to store initial tables used for interrupt
+ * management.
+ */
+static rtems_irq_global_settings* 	internal_config;
+static rtems_irq_connect_data*		rtems_hdl_tbl;
+
+/*
+ * Check if symbolic IRQ name is an USIU IRQ
+ */
+static inline int is_usiu_irq(const rtems_irq_symbolic_name irqLine)
+{
+  return (((int) irqLine <= CPU_USIU_IRQ_MAX_OFFSET) &&
+	  ((int) irqLine >= CPU_USIU_IRQ_MIN_OFFSET)
+	 );
+}
+
+/*
+ * Check if symbolic IRQ name is an UIMB IRQ
+ */
+static inline int is_uimb_irq(const rtems_irq_symbolic_name irqLine)
+{
+  return (((int) irqLine <= CPU_UIMB_IRQ_MAX_OFFSET) &&
+	  ((int) irqLine >= CPU_UIMB_IRQ_MIN_OFFSET)
+	 );
+}
+
+/*
+ * Check if symbolic IRQ name is a Processor IRQ
+ */
+static inline int is_proc_irq(const rtems_irq_symbolic_name irqLine)
+{
+  return (((int) irqLine <= CPU_PROC_IRQ_MAX_OFFSET) &&
+	  ((int) irqLine >= CPU_PROC_IRQ_MIN_OFFSET)
+	 );
+}
+
+
+/*
+ * Masks used to mask off the interrupts. For exmaple, for ILVL2, the  
+ * mask is used to mask off interrupts ILVL2, IRQ3, ILVL3, ... IRQ7    
+ * and ILVL7.                                                          
+ *
+ */
+const static unsigned int USIU_IvectMask[CPU_USIU_IRQ_COUNT] =
+{
+  0,		 		/* external IRQ 0 */
+  0xFFFFFFFF << 31, 		/* internal level 0 */
+  0xFFFFFFFF << 30, 		/* external IRQ 1 */
+  0xFFFFFFFF << 29, 		/* internal level 1 */
+  0xFFFFFFFF << 28, 		/* external IRQ 2 */
+  0xFFFFFFFF << 27, 		/* internal level 2 */
+  0xFFFFFFFF << 26, 		/* external IRQ 3 */
+  0xFFFFFFFF << 25, 		/* internal level 3 */
+  0xFFFFFFFF << 24, 		/* external IRQ 4 */
+  0xFFFFFFFF << 23, 		/* internal level 4 */
+  0xFFFFFFFF << 22, 		/* external IRQ 5 */
+  0xFFFFFFFF << 21, 		/* internal level 5 */
+  0xFFFFFFFF << 20, 		/* external IRQ 6 */
+  0xFFFFFFFF << 19, 		/* internal level 6 */
+  0xFFFFFFFF << 18, 		/* external IRQ 7 */
+  0xFFFFFFFF << 17 		/* internal level 7 */
+};
+
+
+/*
+ * ------------------------ RTEMS Irq helper functions ----------------
+ */
+
+/*
+ * Caution : this function assumes the variable "internal_config"
+ * is already set and that the tables it contains are still valid
+ * and accessible.
+ */
+static void compute_USIU_IvectMask_from_prio ()
+{
+  /*
+   * In theory this is feasible. No time to code it yet. See i386/shared/irq.c
+   * for an example based on 8259 controller mask. The actual masks defined
+   * correspond to the priorities defined for the USIU in irq_init.c.
+   */
+}
+
+/*
+ * This function check that the value given for the irq line
+ * is valid.
+ */
+static int isValidInterrupt(int irq)
+{
+  if ( (irq < CPU_MIN_OFFSET) || (irq > CPU_MAX_OFFSET) 
+        || (irq == CPU_UIMB_INTERRUPT) )
+    return 0;
+  return 1;
+}
+
+int CPU_irq_enable_at_uimb(const rtems_irq_symbolic_name irqLine)
+{
+  if (!is_uimb_irq(irqLine))
+    return 1;
+  return 0;
+}
+
+int CPU_irq_disable_at_uimb(const rtems_irq_symbolic_name irqLine)
+{
+  if (!is_uimb_irq(irqLine))
+    return 1;
+  return 0;
+}
+
+int CPU_irq_enabled_at_uimb(const rtems_irq_symbolic_name irqLine)
+{
+  if (!is_uimb_irq(irqLine))
+    return 0;
+  return 1;
+}
+
+int CPU_irq_enable_at_usiu(const rtems_irq_symbolic_name irqLine)
+{
+  int usiu_irq_index;
+  
+  if (!is_usiu_irq(irqLine))
+    return 1;
+
+  usiu_irq_index = ((int) (irqLine) - CPU_USIU_IRQ_MIN_OFFSET);
+  ppc_cached_irq_mask |= (1 << (31-usiu_irq_index));
+  usiu.simask = ppc_cached_irq_mask;
+
+  return 0;
+}
+
+int CPU_irq_disable_at_usiu(const rtems_irq_symbolic_name irqLine)
+{
+  int usiu_irq_index;
+
+  if (!is_usiu_irq(irqLine))
+    return 1;
+  
+  usiu_irq_index = ((int) (irqLine) - CPU_USIU_IRQ_MIN_OFFSET);
+  ppc_cached_irq_mask &= ~(1 << (31-usiu_irq_index));
+  usiu.simask = ppc_cached_irq_mask;
+
+  return 0;
+}
+
+int CPU_irq_enabled_at_usiu(const rtems_irq_symbolic_name irqLine)
+{
+  int usiu_irq_index;
+
+  if (!is_usiu_irq(irqLine))
+    return 0;
+
+  usiu_irq_index = ((int) (irqLine) - CPU_USIU_IRQ_MIN_OFFSET);
+  return ppc_cached_irq_mask & (1 << (31-usiu_irq_index));
+}
+
+/*
+ * --------------- RTEMS Single Irq Handler Mngt Routines ----------------
+ */
+
+int CPU_install_rtems_irq_handler	(const rtems_irq_connect_data* irq)
+{
+    unsigned int level;
+  
+    if (!isValidInterrupt(irq->name)) {
+      return 0;
+    }
+    /*
+     * Check if default handler is actually connected. If not issue an error.
+     * You must first get the current handler via CPU_get_current_idt_entry
+     * and then disconnect it using CPU_delete_idt_entry.
+     * RATIONALE : to always have the same transition by forcing the user
+     * to get the previous handler before accepting to disconnect.
+     */
+    if (rtems_hdl_tbl[irq->name].hdl != default_rtems_entry.hdl) {
+      return 0;
+    }
+
+    _CPU_ISR_Disable(level);
+
+    /*
+     * store the data provided by user
+     */
+    rtems_hdl_tbl[irq->name] = *irq;
+    
+    if (is_uimb_irq(irq->name)) {
+      /*
+       * Enable interrupt at UIMB level
+       */
+      CPU_irq_enable_at_uimb (irq->name);
+    }
+    
+    if (is_usiu_irq(irq->name)) {
+      /*
+       * Enable interrupt at USIU level
+       */
+      CPU_irq_enable_at_usiu (irq->name);
+    }
+
+    if (is_proc_irq(irq->name)) {
+      /*
+       * Should Enable exception at processor level but not needed.  Will restore
+       * EE flags at the end of the routine anyway.
+       */
+    }
+    /*
+     * Enable interrupt on device
+     */
+    irq->on(irq);
+    
+    _CPU_ISR_Enable(level);
+
+    return 1;
+}
+
+
+int CPU_get_current_rtems_irq_handler	(rtems_irq_connect_data* irq)
+{
+     if (!isValidInterrupt(irq->name)) {
+       return 0;
+     }
+     *irq = rtems_hdl_tbl[irq->name];
+     return 1;
+}
+
+int CPU_remove_rtems_irq_handler  (const rtems_irq_connect_data* irq)
+{
+    unsigned int level;
+  
+    if (!isValidInterrupt(irq->name)) {
+      return 0;
+    }
+    /*
+     * Check if default handler is actually connected. If not issue an error.
+     * You must first get the current handler via CPU_get_current_idt_entry
+     * and then disconnect it using CPU_delete_idt_entry.
+     * RATIONALE : to always have the same transition by forcing the user
+     * to get the previous handler before accepting to disconnect.
+     */
+    if (rtems_hdl_tbl[irq->name].hdl != irq->hdl) {
+      return 0;
+    }
+    _CPU_ISR_Disable(level);
+
+    /*
+     * Disable interrupt on device
+     */
+    irq->off(irq);
+
+    if (is_uimb_irq(irq->name)) {
+      /*
+       * disable interrupt at UIMB level
+       */
+      CPU_irq_disable_at_uimb (irq->name);
+    }
+    if (is_usiu_irq(irq->name)) {
+      /*
+       * disable interrupt at USIU level
+       */
+      CPU_irq_disable_at_usiu (irq->name);
+    }
+    if (is_proc_irq(irq->name)) {
+      /*
+       * disable exception at processor level
+       */
+    }    
+
+    /*
+     * restore the default irq value
+     */
+    rtems_hdl_tbl[irq->name] = default_rtems_entry;
+
+    _CPU_ISR_Enable(level);
+
+    return 1;
+}
+
+/*
+ * ---------------- RTEMS Global Irq Handler Mngt Routines ----------------
+ */
+
+int CPU_rtems_irq_mngt_set	(rtems_irq_global_settings* config)
+{
+    int i;
+    unsigned int level;
+
+   /*
+    * Store various code accelerators
+    */
+    internal_config 		= config;
+    default_rtems_entry 	= config->defaultEntry;
+    rtems_hdl_tbl 		= config->irqHdlTbl;
+
+    _CPU_ISR_Disable(level);
+
+    /*
+     * Start with UIMB IRQ
+     */
+    for (i = CPU_UIMB_IRQ_MIN_OFFSET; i <= CPU_UIMB_IRQ_MAX_OFFSET ; i++) {
+      if (rtems_hdl_tbl[i].hdl != default_rtems_entry.hdl) {
+	CPU_irq_enable_at_uimb (i);
+	rtems_hdl_tbl[i].on(&rtems_hdl_tbl[i]);
+      }
+      else {
+	rtems_hdl_tbl[i].off(&rtems_hdl_tbl[i]);
+	CPU_irq_disable_at_uimb (i);
+      }
+    }
+
+    /*
+     * Continue with USIU IRQ
+     * Set up internal tables used by rtems interrupt prologue
+     */
+    compute_USIU_IvectMask_from_prio ();
+
+    for (i = CPU_USIU_IRQ_MIN_OFFSET; i <= CPU_USIU_IRQ_MAX_OFFSET ; i++) {
+      if (rtems_hdl_tbl[i].hdl != default_rtems_entry.hdl) {
+	CPU_irq_enable_at_usiu (i);
+	rtems_hdl_tbl[i].on(&rtems_hdl_tbl[i]);
+      }
+      else {
+	rtems_hdl_tbl[i].off(&rtems_hdl_tbl[i]);
+	CPU_irq_disable_at_usiu (i);
+       }
+    }
+
+    /*
+     * Enable all UIMB interrupt lines, then enable at USIU.
+     */
+    imb.uimb.umcr |= UIMB_UMCR_IRQMUX(3);
+    CPU_irq_enable_at_usiu (CPU_UIMB_INTERRUPT);
+
+    /*
+     * finish with Processor exceptions handled like IRQ
+     */
+    for (i = CPU_PROC_IRQ_MIN_OFFSET; i <= CPU_PROC_IRQ_MAX_OFFSET; i++) {
+      if (rtems_hdl_tbl[i].hdl != default_rtems_entry.hdl) {
+	rtems_hdl_tbl[i].on(&rtems_hdl_tbl[i]);
+      }
+      else {
+	rtems_hdl_tbl[i].off(&rtems_hdl_tbl[i]);
+      }
+    }
+    _CPU_ISR_Enable(level);
+    return 1;
+}
+
+int CPU_rtems_irq_mngt_get(rtems_irq_global_settings** config)
+{
+    *config = internal_config;
+    return 0;
+}
+
+
+/*
+ * High level IRQ handler called from shared_raw_irq_code_entry
+ */
+void C_dispatch_irq_handler (CPU_Interrupt_frame *frame, unsigned int excNum)
+{
+  register unsigned int irq;
+  register unsigned uimbIntr;                 /* boolean */
+  register unsigned oldMask;		      /* old siu pic masks */
+  register unsigned msr;
+  register unsigned new_msr;
+
+  /*
+   * Handle decrementer interrupt
+   */
+  if (excNum == ASM_DEC_VECTOR) {
+    _CPU_MSR_GET(msr);
+    new_msr = msr | MSR_EE;
+    _CPU_MSR_SET(new_msr);
+    
+    rtems_hdl_tbl[CPU_DECREMENTER].hdl();
+
+    _CPU_MSR_SET(msr);
+    return;
+  }
+
+  /*
+   * Handle external interrupt generated by USIU on PPC core
+   */
+  while ((ppc_cached_irq_mask & usiu.sipend) != 0) {
+    irq = (usiu.sivec >> 26);
+    uimbIntr = (irq == CPU_UIMB_INTERRUPT);
+    /*
+     * Disable the interrupt of the same and lower priority.
+     */
+    oldMask = ppc_cached_irq_mask;
+    ppc_cached_irq_mask = oldMask & USIU_IvectMask[irq];
+    usiu.simask = ppc_cached_irq_mask;
+    /*
+     * Acknowledge current interrupt. This has no effect on internal level
+     * interrupts.
+     */
+    usiu.sipend = (1 << (31 - irq));
+    
+    if (uimbIntr)  {
+      /*
+       * Look at the bits set in the UIMB interrupt-pending register.  The
+       * highest-order set bit indicates the handler we will run. 
+       *
+       * Unfortunately, we can't easily mask individual UIMB interrupts
+       * unless they use USIU levels 0 to 6, so we must mask all low-level
+       * (level > 7) UIMB interrupts while we service any interrupt.
+       */
+      int uipend = imb.uimb.uipend << 8;
+      
+      if (uipend == 0) {	/* spurious interrupt?  use last vector */
+        irq = CPU_UIMB_IRQ_MAX_OFFSET;	
+      }
+      else {
+        irq = CPU_UIMB_IRQ_MIN_OFFSET;
+        for ( ; (uipend & 0x8000000) == 0; uipend <<= 1) {
+          irq++;
+        }
+      }
+    }
+    _CPU_MSR_GET(msr);
+    new_msr = msr | MSR_EE;
+    _CPU_MSR_SET(new_msr);
+    
+    rtems_hdl_tbl[irq].hdl();
+
+    _CPU_MSR_SET(msr);
+
+    ppc_cached_irq_mask = oldMask;
+    usiu.simask = ppc_cached_irq_mask;
+  }
+}
+  
+void _ThreadProcessSignalsFromIrq (CPU_Exception_frame* ctx)
+{
+  /*
+   * Process pending signals that have not already been
+   * processed by _Thread_Displatch. This happens quite
+   * unfrequently : the ISR must have posted an action
+   * to the current running thread.
+   */
+  if ( _Thread_Do_post_task_switch_extension ||
+       _Thread_Executing->do_post_task_switch_extension ) {
+    _Thread_Executing->do_post_task_switch_extension = FALSE;
+    _API_extensions_Run_postswitch();
+  }
+  /*
+   * I plan to process other thread related events here.
+   * This will include DEBUG session requested from keyboard...
+   */
+}
diff --git a/c/src/lib/libcpu/powerpc/mpc5xx/irq/irq.h b/c/src/lib/libcpu/powerpc/mpc5xx/irq/irq.h
new file mode 100644
index 0000000000..dd4f9948e1
--- /dev/null
+++ b/c/src/lib/libcpu/powerpc/mpc5xx/irq/irq.h
@@ -0,0 +1,358 @@
+/* 
+ * irq.h
+ *
+ *  This include file describe the data structure and the functions implemented
+ *  by rtems to write interrupt handlers.
+ *
+ *
+ *  MPC5xx port sponsored by Defence Research and Development Canada - Suffield
+ *  Copyright (C) 2004, Real-Time Systems Inc. (querbach@realtime.bc.ca)
+ *
+ *  Derived from libbsp/powerpc/mbx8xx/irq/irq.h:
+ *
+ *  CopyRight (C) 1999 valette@crf.canon.fr
+ *
+ *  This code is heavilly inspired by the public specification of STREAM V2
+ *  that can be found at :
+ *
+ *      <http://www.chorus.com/Documentation/index.html> by following
+ *  the STREAM API Specification Document link.
+ *
+ *  The license and distribution terms for this file may be
+ *  found in found in the file LICENSE in this distribution or at
+ *  http://www.rtems.com/license/LICENSE.
+ *
+ *  $Id$
+ */
+
+#ifndef LIBCPU_POWERPC_MBX8XX_IRQ_IRQ_H
+#define LIBCPU_POWERPC_MBX8XX_IRQ_IRQ_H
+
+
+#define CPU_ASM_IRQ_VECTOR_BASE 0x0
+
+#ifndef ASM
+
+extern volatile unsigned int ppc_cached_irq_mask;
+
+/*
+ * Symblolic IRQ names and related definitions.
+ */
+
+typedef enum {
+  /* 
+   * Base vector for our USIU IRQ handlers. 
+   */
+  CPU_USIU_VECTOR_BASE		= CPU_ASM_IRQ_VECTOR_BASE,
+  /*
+   * USIU IRQ handler related definitions
+   */
+  CPU_USIU_IRQ_COUNT    	= 16, /* 16 reserved but in the future... */
+  CPU_USIU_IRQ_MIN_OFFSET	= 0,
+  CPU_USIU_IRQ_MAX_OFFSET	= CPU_USIU_IRQ_MIN_OFFSET + CPU_USIU_IRQ_COUNT - 1,
+  /*
+   * UIMB IRQ handlers related definitions
+   */
+  CPU_UIMB_IRQ_COUNT		= 32 - 8, /* first 8 overlap USIU */
+  CPU_UIMB_IRQ_MIN_OFFSET	= CPU_USIU_IRQ_COUNT + CPU_USIU_VECTOR_BASE,
+  CPU_UIMB_IRQ_MAX_OFFSET	= CPU_UIMB_IRQ_MIN_OFFSET + CPU_UIMB_IRQ_COUNT - 1,
+  /*
+   * PowerPc exceptions handled as interrupt where a rtems managed interrupt
+   * handler might be connected
+   */
+  CPU_PROC_IRQ_COUNT		= 1,
+  CPU_PROC_IRQ_MIN_OFFSET	= CPU_UIMB_IRQ_MAX_OFFSET + 1,
+  CPU_PROC_IRQ_MAX_OFFSET	= CPU_PROC_IRQ_MIN_OFFSET + CPU_PROC_IRQ_COUNT - 1,
+  /*
+   * Summary
+   */
+  CPU_IRQ_COUNT			= CPU_PROC_IRQ_MAX_OFFSET + 1,
+  CPU_MIN_OFFSET		= CPU_USIU_IRQ_MIN_OFFSET,
+  CPU_MAX_OFFSET		= CPU_PROC_IRQ_MAX_OFFSET,
+  /*
+   * USIU IRQ symbolic name definitions.
+   */	       
+  CPU_USIU_EXT_IRQ_0      	= CPU_USIU_IRQ_MIN_OFFSET,
+  CPU_USIU_INT_IRQ_0,
+
+  CPU_USIU_EXT_IRQ_1,
+  CPU_USIU_INT_IRQ_1,
+
+  CPU_USIU_EXT_IRQ_2,
+  CPU_USIU_INT_IRQ_2,
+  
+  CPU_USIU_EXT_IRQ_3,
+  CPU_USIU_INT_IRQ_3,
+  
+  CPU_USIU_EXT_IRQ_4,
+  CPU_USIU_INT_IRQ_4,
+
+  CPU_USIU_EXT_IRQ_5,
+  CPU_USIU_INT_IRQ_5,
+  
+  CPU_USIU_EXT_IRQ_6,
+  CPU_USIU_INT_IRQ_6,
+  
+  CPU_USIU_EXT_IRQ_7,
+  CPU_USIU_INT_IRQ_7,
+
+  /*
+   * Symbolic names for UISU interrupt sources.
+   */
+  CPU_PERIODIC_TIMER		= CPU_USIU_INT_IRQ_6,
+  CPU_UIMB_INTERRUPT		= CPU_USIU_INT_IRQ_7,
+              
+  /*
+   * UIMB IRQ symbolic name definitions.  The first 8 sources are aliases to
+   * the USIU interrupts of the same number, because they are detected in
+   * the USIU pending register rather than the UIMB pending register.
+   */
+  CPU_UIMB_IRQ_0 		= CPU_USIU_INT_IRQ_0,
+  CPU_UIMB_IRQ_1 		= CPU_USIU_INT_IRQ_1,
+  CPU_UIMB_IRQ_2 		= CPU_USIU_INT_IRQ_2,
+  CPU_UIMB_IRQ_3 		= CPU_USIU_INT_IRQ_3,
+  CPU_UIMB_IRQ_4 		= CPU_USIU_INT_IRQ_4,
+  CPU_UIMB_IRQ_5 		= CPU_USIU_INT_IRQ_5,
+  CPU_UIMB_IRQ_6 		= CPU_USIU_INT_IRQ_6,
+  CPU_UIMB_IRQ_7 		= CPU_USIU_INT_IRQ_7,
+
+  CPU_UIMB_IRQ_8         	= CPU_UIMB_IRQ_MIN_OFFSET,
+  CPU_UIMB_IRQ_9,
+  CPU_UIMB_IRQ_10,
+  CPU_UIMB_IRQ_11,
+  CPU_UIMB_IRQ_12,
+  CPU_UIMB_IRQ_13,
+  CPU_UIMB_IRQ_14,
+  CPU_UIMB_IRQ_15,
+  CPU_UIMB_IRQ_16,
+  CPU_UIMB_IRQ_17,
+  CPU_UIMB_IRQ_18,
+  CPU_UIMB_IRQ_19,
+  CPU_UIMB_IRQ_20,
+  CPU_UIMB_IRQ_21,
+  CPU_UIMB_IRQ_22,
+  CPU_UIMB_IRQ_23,
+  CPU_UIMB_IRQ_24,
+  CPU_UIMB_IRQ_25,
+  CPU_UIMB_IRQ_26,
+  CPU_UIMB_IRQ_27,
+  CPU_UIMB_IRQ_28,
+  CPU_UIMB_IRQ_29,
+  CPU_UIMB_IRQ_30,
+  CPU_UIMB_IRQ_31,
+  
+  /*
+   * Symbolic names for UIMB interrupt sources.
+   */
+  CPU_IRQ_SCI			= CPU_UIMB_IRQ_5,
+
+  /*
+   * Processor exceptions handled as rtems IRQ symbolic name definitions.
+   */
+  CPU_DECREMENTER		= CPU_PROC_IRQ_MIN_OFFSET
+     
+}rtems_irq_symbolic_name;
+
+/*
+ * Convert an rtems_irq_symbolic_name constant to an interrupt level
+ * suitable for programming into an I/O device's interrupt level field.
+ */
+int CPU_irq_level_from_symbolic_name(const rtems_irq_symbolic_name name);
+
+/*
+ * Type definition for RTEMS managed interrupts
+ */
+typedef unsigned char  rtems_irq_prio;
+struct 	__rtems_irq_connect_data__;	/* forward declaratiuon */
+
+typedef void (*rtems_irq_hdl)		(void);
+typedef void (*rtems_irq_enable)	(const struct __rtems_irq_connect_data__*);
+typedef void (*rtems_irq_disable)	(const struct __rtems_irq_connect_data__*);
+typedef int  (*rtems_irq_is_enabled)	(const struct __rtems_irq_connect_data__*);
+
+typedef struct __rtems_irq_connect_data__ {
+  /*
+   * IRQ line
+   */
+  rtems_irq_symbolic_name 	name;
+  /*
+   * Handler. See comment on handler properties below in function prototype.
+   */
+  rtems_irq_hdl	   		hdl;
+  /*
+   * Function for enabling interrupts at device level (ONLY!).
+   * The CPU code will automatically enable it at USIU level and UIMB level.
+   * RATIONALE : anyway such code has to exist in current driver code.
+   * It is usually called immediately AFTER connecting the interrupt handler.
+   * RTEMS may well need such a function when restoring normal interrupt
+   * processing after a debug session.
+   * 
+   */
+    rtems_irq_enable		on;	
+  /*
+   * Function for disabling interrupts at device level (ONLY!).
+   * The code will disable it at USIU and UIMB level. RATIONALE : anyway
+   * such code has to exist for clean shutdown. It is usually called
+   * BEFORE disconnecting the interrupt. RTEMS may well need such
+   * a function when disabling normal interrupt processing for
+   * a debug session. May well be a NOP function.
+   */
+  rtems_irq_disable		off;
+  /*
+   * Function enabling to know what interrupt may currently occur
+   * if someone manipulates the USIU and UIMB interrupt mask without care...
+   */
+  rtems_irq_is_enabled		isOn;
+}rtems_irq_connect_data;
+
+typedef struct {
+  /*
+   * size of all the table fields (*Tbl) described below.
+   */
+  unsigned int	 		irqNb;
+  /*
+   * Default handler used when disconnecting interrupts.
+   */
+  rtems_irq_connect_data	defaultEntry;
+  /*
+   * Table containing initials/current value.
+   */
+  rtems_irq_connect_data*	irqHdlTbl;
+  /*
+   * actual value of CPU_USIU_IRQ_VECTOR_BASE...
+   */
+  rtems_irq_symbolic_name	irqBase;
+  /*
+   * software priorities associated with interrupts.
+   * if irqPrio  [i]  >  intrPrio  [j]  it  means  that  
+   * interrupt handler hdl connected for interrupt name i
+   * will  not be interrupted by the handler connected for interrupt j
+   * The interrupt source  will be physically masked at USIU and UIMB level.
+   */
+  rtems_irq_prio*		irqPrioTbl;
+}rtems_irq_global_settings;
+
+
+/*-------------------------------------------------------------------------+
+| Function Prototypes.
++--------------------------------------------------------------------------*/
+
+#if 0
+/*
+ * -------------------- MPC5xx USIU Management Routines -----------------
+ */
+/*
+ * Function to disable a particular irq at USIU level.  After calling
+ * this function, even if the device asserts the interrupt line it will
+ * not be propagated further to the processor
+ */
+int CPU_irq_disable_at_usiu	(const rtems_irq_symbolic_name irqLine);
+/*
+ * Function to enable a particular irq at USIU level.  After calling
+ * this function, if the device asserts the interrupt line it will
+ * be propagated further to the processor
+ */
+int CPU_irq_enable_at_usiu	(const rtems_irq_symbolic_name irqLine);
+/*
+ * Function to acknowledge a particular irq at USIU level.  After calling
+ * this function, if a device asserts an enabled interrupt line it will
+ * be propagated further to the processor. Mainly useful for people
+ * writing raw handlers as this is automagically done for rtems managed
+ * handlers.
+ */
+int CPU_irq_ack_at_siu		(const rtems_irq_symbolic_name irqLine);
+/*
+ * function to check if a particular irq is enabled at USIU level.
+ */
+int CPU_irq_enabled_at_siu	(const rtems_irq_symbolic_name irqLine);
+
+#endif
+
+/*
+ * ------------ RTEMS Single Irq Handler Management Routines ----------------
+ */
+/*
+ * Function to connect a particular irq handler. This handler will NOT be
+ * called directly as the result of the corresponding interrupt. Instead, a
+ * RTEMS irq prologue will be called that will :
+ *
+ *	1) save the C scratch registers,
+ *	2) switch to a interrupt stack if the interrupt is not nested,
+ *	4) modify them to disable the current interrupt at  USIU level (and
+ *	   maybe others depending on software priorities)
+ *	5) aknowledge the USIU',
+ *	6) demask the processor,
+ *	7) call the application handler
+ *
+ * As a result the hdl function provided
+ *
+ *	a) can perfectly be written is C,
+ * 	b) may also well directly call the part of the RTEMS API that can be
+ *	   used from interrupt level,
+ *	c) It only responsible for handling the jobs that need to be done at
+ *	   the device level including (aknowledging/re-enabling the
+ *	   interrupt at device, level, getting the data,...)
+ *
+ *	When returning from the function, the following will be performed by
+ *	the RTEMS irq epilogue :
+ *
+ *	1) masks the interrupts again,
+ *	2) restore the original USIU interrupt masks
+ *	3) switch back on the orinal stack if needed,
+ *	4) perform rescheduling when necessary,
+ *	5) restore the C scratch registers...
+ *	6) restore initial execution flow
+ * 
+ */
+int CPU_install_rtems_irq_handler   	(const rtems_irq_connect_data*);
+/*
+ * Function to connect an RTEMS irq handler for ptr->name.
+ */
+int CPU_get_current_rtems_irq_handler	(rtems_irq_connect_data* ptr);
+/*
+ * Function to get the RTEMS irq handler for ptr->name.
+ */
+int CPU_remove_rtems_irq_handler    	(const rtems_irq_connect_data*);
+/*
+ * Function to disconnect the RTEMS irq handler for ptr->name.  This
+ * function checks that the value given is the current one for safety
+ * reason.  The user can use the previous function to get it.
+ */
+
+/*
+ * ------------ RTEMS Global Irq Handler Management Routines ----------------
+ */
+/*
+ * (Re) Initialize the RTEMS interrupt management.
+ *
+ * The result of calling this function will be the same as if each
+ * individual handler (config->irqHdlTbl[i].hdl) different from
+ * "config->defaultEntry.hdl" has been individualy connected via
+ *
+ *	CPU_install_rtems_irq_handler(&config->irqHdlTbl[i])
+ *
+ * and each handler currently equal to config->defaultEntry.hdl
+ * has been previously disconnected via
+ *
+ * 	 CPU_remove_rtems_irq_handler (&config->irqHdlTbl[i])
+ *
+ * This is to say that all information given will be used and not just
+ * only the space.
+ *
+ * CAUTION : the various table address contained in config will be used
+ *	     directly by the interrupt mangement code in order to save
+ *	     data size so they must stay valid after the call => they should
+ *	     not be modified or declared on a stack.
+ */
+
+int CPU_rtems_irq_mngt_set(rtems_irq_global_settings* config);
+/*
+ * (Re) get info on current RTEMS interrupt management.
+ */
+int CPU_rtems_irq_mngt_get(rtems_irq_global_settings**);
+  
+extern void CPU_rtems_irq_mng_init(unsigned cpuId);
+
+#endif
+
+#endif
diff --git a/c/src/lib/libcpu/powerpc/mpc5xx/irq/irq_asm.S b/c/src/lib/libcpu/powerpc/mpc5xx/irq/irq_asm.S
new file mode 100644
index 0000000000..2908509bfc
--- /dev/null
+++ b/c/src/lib/libcpu/powerpc/mpc5xx/irq/irq_asm.S
@@ -0,0 +1,325 @@
+/*
+ * irq_asm.S
+ *
+ *  This file contains the assembly code for the PowerPC 
+ *  IRQ veneers for RTEMS.
+ *
+ *  The license and distribution terms for this file may be
+ *  found in found in the file LICENSE in this distribution or at
+ *  http://www.rtems.com/license/LICENSE.
+ *
+ *
+ *  MPC5xx port sponsored by Defence Research and Development Canada - Suffield
+ *  Copyright (C) 2004, Real-Time Systems Inc. (querbach@realtime.bc.ca)
+ *
+ *  Derived from libbsp/powerpc/mbx8xx/irq/irq_asm.S:
+ *
+ *  Modified to support the MCP750.
+ *  Modifications Copyright (C) 1999 Eric Valette. valette@crf.canon.fr
+ *
+ *  Till Straumann <strauman@slac.stanford.edu>, 2003/7:
+ *    - store isr nesting level in _ISR_Nest_level rather than
+ *      SPRG0 - RTEMS relies on that variable.
+ *
+ * $Id$
+ */
+  	
+#include <asm.h>
+#include <rtems/score/cpu.h>
+#include <libcpu/vectors.h>
+#include <libcpu/raw_exception.h>
+
+
+#define SYNC \
+	sync; \
+	isync
+	
+/*
+ * Common handler for interrupt exceptions.
+ *
+ * The function CPU_rtems_irq_mng_init() initializes the decrementer and
+ * external interrupt entries in the exception handler table with pointers
+ * to this routine, which saves the remainder of the interrupted code's
+ * state, then calls C_dispatch_irq_handler().
+ *
+ * On entry, R1 points to a new exception stack frame in which R3, R4, and
+ * LR have been saved.  R4 holds the exception number.
+ */
+	PUBLIC_VAR(C_dispatch_irq_handler)
+	
+	PUBLIC_VAR(dispatch_irq_handler)
+SYM (dispatch_irq_handler):
+	/*
+	 * Save SRR0/SRR1 As soon As possible as it is the minimal needed 
+	 * to re-enable exception processing.
+	 * 
+	 * Note that R2 should never change (it's the EABI pointer to
+	 * .sdata2), but we save it just in case.  
+         */
+	stw	r0, GPR0_OFFSET(r1)
+	stw	r2, GPR2_OFFSET(r1)
+	
+	mfsrr0  r0
+	mfsrr1  r3
+	
+	stw	r0, SRR0_FRAME_OFFSET(r1)
+	stw	r3, SRR1_FRAME_OFFSET(r1)
+
+	/*
+	 * Enable exception recovery.  Also enable FP so that FP context
+	 * can be saved and restored (using FP instructions).
+	 */
+	mfmsr	r3
+	ori     r3, r3, MSR_RI | MSR_FP
+	mtmsr   r3
+	SYNC
+
+	/*
+	 * Push C scratch registers on the current stack. It may actually be
+	 * the thread stack or the interrupt stack.  Anyway we have to make
+	 * it in order to be able to call C/C++ functions. Depending on the
+	 * nesting interrupt level, we will switch to the right stack later.
+	 */
+	stw	r5, GPR5_OFFSET(r1)
+	stw	r6, GPR6_OFFSET(r1)
+	stw	r7, GPR7_OFFSET(r1)
+	stw	r8, GPR8_OFFSET(r1)
+	stw	r9, GPR9_OFFSET(r1)
+	stw	r10, GPR10_OFFSET(r1)
+	stw	r11, GPR11_OFFSET(r1)
+	stw	r12, GPR12_OFFSET(r1)
+	stw	r13, GPR13_OFFSET(r1)
+
+	mfcr	r5
+	mfctr	r6
+	mfxer	r7
+		
+	stw	r5,  EXC_CR_OFFSET(r1)
+	stw	r6,  EXC_CTR_OFFSET(r1)
+	stw	r7,  EXC_XER_OFFSET(r1)
+		
+	/*
+	 * Add some non volatile registers to store information that will be
+	 * used when returning from C handler.
+	 */
+	stw	r14, GPR14_OFFSET(r1)
+	stw	r15, GPR15_OFFSET(r1)
+
+	/*
+	 * Save current stack pointer location in R14.
+	 */
+	addi	r14, r1, 0
+
+	/*
+	 * store part of _Thread_Dispatch_disable_level address in R15
+	 */
+	addis r15, 0, _Thread_Dispatch_disable_level@ha
+
+	/*
+	 * Retrieve current nesting level from _ISR_Nest_level
+	 */
+	lis		r7, _ISR_Nest_level@ha
+	lwz		r3, _ISR_Nest_level@l(r7)
+
+	/*
+	 * Check if stack switch is necessary
+	 */
+	cmpwi	r3, 0
+	bne	nested
+
+	mfspr	r1, SPRG1		/* switch to interrupt stack */
+nested:	
+
+	/* 
+	 * Start Incrementing nesting level in R3
+	 */
+	addi	r3, r3, 1
+
+	/*
+	 * Start Incrementing _Thread_Dispatch_disable_level R4 = _Thread_Dispatch_disable_level
+	 */
+	lwz	r6, _Thread_Dispatch_disable_level@l(r15)
+
+	/* store new nesting level in _ISR_Nest_level */
+	stw	r3, _ISR_Nest_level@l(r7)
+
+	addi	r6, r6, 1
+
+	/*
+	 * store new _Thread_Dispatch_disable_level value
+	 */
+	stw	r6, _Thread_Dispatch_disable_level@l(r15)
+
+	/*
+	 * We are now running on the interrupt stack. External and decrementer
+	 * exceptions are still disabled. I see no purpose trying to optimize
+	 * further assembler code. 
+	 */
+
+	/*
+	 * Call C exception handler for decrementer or external interrupt. 
+	 * Pass frame along just in case..
+	 *
+	 * C_dispatch_irq_handler(cpu_interrupt_frame* r3, vector r4)
+	 */
+	addi	r3, r14, 0x8
+	bl	C_dispatch_irq_handler
+
+	/*
+	 * start decrementing nesting level. Note : do not test result against 0 
+	 * value as an easy exit condition because if interrupt nesting level > 1
+	 * then _Thread_Dispatch_disable_level > 1
+	 */
+	lis		r7, _ISR_Nest_level@ha
+	lwz		r4, _ISR_Nest_level@l(r7)
+
+	/*
+	 * start decrementing _Thread_Dispatch_disable_level
+	 */
+	lwz	r3,_Thread_Dispatch_disable_level@l(r15)
+
+	addi	r4, r4, -1	/* Continue decrementing nesting level */
+	addi	r3, r3, -1	/* Continue decrementing _Thread_Dispatch_disable_level */
+
+	stw	r4, _ISR_Nest_level@l(r7) /* End decrementing nesting level */
+	stw	r3,_Thread_Dispatch_disable_level@l(r15) /* End decrementing _Thread_Dispatch_disable_level */
+
+	cmpwi	r3, 0
+
+	/*
+	 * switch back to original stack (done here just optimize registers 
+	 * contention. Could have been done before...)
+	 */
+	addi	r1, r14, 0
+	bne	easy_exit /* if (_Thread_Dispatch_disable_level != 0) goto easy_exit */
+
+	/*
+	 * Here we are running again on the thread system stack.
+	 * We have interrupt nesting level = _Thread_Dispatch_disable_level = 0.
+	 * Interrupt are still disabled. Time to check if scheduler request to 
+	 * do something with the current thread...
+	 */
+	addis	r4, 0, _Context_Switch_necessary@ha
+	lwz	r5, _Context_Switch_necessary@l(r4)
+	cmpwi	r5, 0
+	bne	switch
+	
+	addis	r6, 0, _ISR_Signals_to_thread_executing@ha
+	lwz	r7, _ISR_Signals_to_thread_executing@l(r6)
+	cmpwi	r7, 0
+	li	r8, 0
+	beq	easy_exit
+
+	stw	r8, _ISR_Signals_to_thread_executing@l(r6)
+
+	/*
+	 * going to call _ThreadProcessSignalsFromIrq
+	 * Push a complete exception like frame...
+	 */
+	stmw	r16, GPR16_OFFSET(r1)
+	addi	r3, r1, 0x8
+
+        /*
+         * compute SP at exception entry
+         */
+        addi    r4, r1, EXCEPTION_FRAME_END
+
+        /*
+         * store it at the right place
+         */
+        stw     r4, GPR1_OFFSET(r1)
+
+	/*
+	 * Call High Level signal handling code
+	 */
+	bl	_ThreadProcessSignalsFromIrq
+
+	/*
+	 * start restoring exception like frame
+	 */
+	lwz	r31,  EXC_CTR_OFFSET(r1)
+	lwz	r30,  EXC_XER_OFFSET(r1)
+	lwz	r29,  EXC_CR_OFFSET(r1)
+	lwz	r28,  EXC_LR_OFFSET(r1)
+	
+	mtctr	r31
+	mtxer	r30
+	mtcr	r29
+	mtlr	r28
+	
+	lmw	r4, GPR4_OFFSET(r1)
+	lwz	r2, GPR2_OFFSET(r1)
+	lwz	r0, GPR0_OFFSET(r1)
+
+	/*
+	 * Make path non recoverable...
+	 */
+	mtspr	nri, r0
+	SYNC
+
+	/*
+	 * Restore rfi related settings
+	 */
+		 
+	lwz	r3, SRR1_FRAME_OFFSET(r1)
+	mtsrr1	r3
+	lwz	r3, SRR0_FRAME_OFFSET(r1)
+	mtsrr0	r3
+	
+	lwz	r3, GPR3_OFFSET(r1)
+	addi 	r1,r1, EXCEPTION_FRAME_END
+	SYNC
+	rfi
+
+	
+switch:
+	bl	SYM (_Thread_Dispatch)
+	
+easy_exit:	
+	/*
+	 * start restoring interrupt frame
+	 */
+	lwz	r3,  EXC_CTR_OFFSET(r1)
+	lwz	r4,  EXC_XER_OFFSET(r1)
+	lwz	r5,  EXC_CR_OFFSET(r1)
+	lwz	r6,  EXC_LR_OFFSET(r1)
+	
+	mtctr	r3
+	mtxer	r4
+	mtcr	r5
+	mtlr	r6
+
+	lwz	r15, GPR15_OFFSET(r1)
+	lwz	r14, GPR14_OFFSET(r1)
+	lwz	r13, GPR13_OFFSET(r1)
+	lwz	r12, GPR12_OFFSET(r1)
+	lwz	r11, GPR11_OFFSET(r1)
+	lwz	r10, GPR10_OFFSET(r1)
+	lwz	r9, GPR9_OFFSET(r1)
+	lwz	r8, GPR8_OFFSET(r1)
+	lwz	r7, GPR7_OFFSET(r1)
+	lwz	r6, GPR6_OFFSET(r1)
+	lwz	r5, GPR5_OFFSET(r1)
+
+	/*
+	 * Disable nested exception processing.
+	 */
+	mtspr	nri, r0
+	SYNC
+
+	/*
+	 * Restore rfi related settings
+	 */
+	lwz	r4, SRR1_FRAME_OFFSET(r1)
+	lwz	r3, SRR0_FRAME_OFFSET(r1)
+	lwz	r2, GPR2_OFFSET(r1)
+	lwz	r0, GPR0_OFFSET(r1)
+
+	mtsrr1	r4
+	mtsrr0	r3
+	lwz	r4, GPR4_OFFSET(r1)
+	lwz	r3, GPR3_OFFSET(r1)
+	addi 	r1,r1, EXCEPTION_FRAME_END
+	SYNC
+	rfi
+
diff --git a/c/src/lib/libcpu/powerpc/mpc5xx/irq/irq_init.c b/c/src/lib/libcpu/powerpc/mpc5xx/irq/irq_init.c
new file mode 100644
index 0000000000..bc2a3043f1
--- /dev/null
+++ b/c/src/lib/libcpu/powerpc/mpc5xx/irq/irq_init.c
@@ -0,0 +1,152 @@
+/* 
+ * irq_init.c
+ *
+ *  This file contains the implementation of rtems initialization
+ *  related to interrupt handling.
+ *
+ *
+ *  MPC5xx port sponsored by Defence Research and Development Canada - Suffield
+ *  Copyright (C) 2004, Real-Time Systems Inc. (querbach@realtime.bc.ca)
+ *
+ *  Derived from libbsp/powerpc/mbx8xx/irq/irq_init.c:
+ *
+ *  CopyRight (C) 2001 valette@crf.canon.fr
+ *
+ *  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.h>
+#include <mpc5xx.h>
+#include <libcpu/vectors.h>
+#include <libcpu/raw_exception.h>
+#include <libcpu/irq.h>
+
+
+extern rtems_exception_handler_t dispatch_irq_handler;
+
+volatile unsigned int ppc_cached_irq_mask;
+
+/*
+ * default on/off function
+ */
+static void nop_func(){}
+
+/*
+ * default isOn function
+ */
+static int not_connected() {return 0;}
+
+/*
+ * default possible isOn function
+ */
+static int connected() {return 1;}
+
+static rtems_irq_connect_data     	rtemsIrq[CPU_IRQ_COUNT];
+static rtems_irq_global_settings     	initial_config;
+static rtems_irq_connect_data     	defaultIrq = {
+  /* vector,	 hdl		, on		, off		, isOn */
+  0, 		 nop_func	, nop_func	, nop_func	, not_connected
+};
+
+static rtems_irq_prio irqPrioTable[CPU_IRQ_COUNT]={
+  /*
+   * actual priorities for interrupt :
+   *	0   means that only current interrupt is masked
+   *	255 means all other interrupts are masked
+   */
+  /*
+   * USIU interrupts.
+   */
+  7,7, 6,6, 5,5, 4,4, 3,3, 2,2, 1,1, 0,0,
+  /*
+   * UIMB Interrupts
+   *
+   * Note that the first 8 UIMB interrupts overlap the 8 external USIU
+   * interrupts.
+   */
+                          0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  /*
+   * Processor exceptions handled as interrupts
+   */
+  0
+};
+
+void CPU_USIU_irq_init()
+{
+  /*
+   * In theory we should initialize two registers at least : SIMASK and
+   * SIEL. SIMASK is reset at 0 value meaning no interrupts.  If someone
+   * find a reasonnable value for SIEL, and the need to change it, please
+   * feel free to add it here.
+   */
+  ppc_cached_irq_mask = 0;
+  usiu.simask = ppc_cached_irq_mask;
+  usiu.sipend = 0xffff0000;
+  usiu.siel = usiu.siel;
+}
+
+/* 
+ * Initialize UIMB interrupt management
+ */
+void
+CPU_UIMB_irq_init(void)
+{
+}
+
+void CPU_rtems_irq_mng_init(unsigned cpuId)
+{
+  rtems_raw_except_connect_data vectorDesc;
+  int i;
+  
+  CPU_USIU_irq_init();
+  CPU_UIMB_irq_init();
+  /*
+   * Initialize Rtems management interrupt table
+   */
+    /*
+     * re-init the rtemsIrq table
+     */
+    for (i = 0; i < CPU_IRQ_COUNT; i++) {
+      rtemsIrq[i]      = defaultIrq;
+      rtemsIrq[i].name = i;
+    }
+    /*
+     * Init initial Interrupt management config
+     */
+    initial_config.irqNb 	= CPU_IRQ_COUNT;
+    initial_config.defaultEntry = defaultIrq;
+    initial_config.irqHdlTbl	= rtemsIrq;
+    initial_config.irqBase	= CPU_ASM_IRQ_VECTOR_BASE;
+    initial_config.irqPrioTbl	= irqPrioTable;
+
+    if (!CPU_rtems_irq_mngt_set(&initial_config)) {
+      /*
+       * put something here that will show the failure...
+       */
+      BSP_panic("Unable to initialize RTEMS interrupt Management\n");
+    }
+  
+  /*
+   * We must connect the raw irq handler for the two
+   * expected interrupt sources : decrementer and external interrupts.
+   */
+    vectorDesc.exceptIndex 	=	ASM_DEC_VECTOR;
+    vectorDesc.hdl.vector	=	ASM_DEC_VECTOR;
+    vectorDesc.hdl.raw_hdl	=	dispatch_irq_handler;
+    vectorDesc.on		=	nop_func;
+    vectorDesc.off		=	nop_func;
+    vectorDesc.isOn		=	connected;
+    if (!mpc5xx_set_exception (&vectorDesc)) {
+      BSP_panic("Unable to initialize RTEMS decrementer raw exception\n");
+    }
+    vectorDesc.exceptIndex	=	ASM_EXT_VECTOR;
+    vectorDesc.hdl.vector	=	ASM_EXT_VECTOR;
+    if (!mpc5xx_set_exception (&vectorDesc)) {
+      BSP_panic("Unable to initialize RTEMS external raw exception\n");
+    }
+}
diff --git a/c/src/lib/libcpu/powerpc/mpc5xx/timer/timer.c b/c/src/lib/libcpu/powerpc/mpc5xx/timer/timer.c
index 3139e62d6d..5a1ce5e2a6 100644
--- a/c/src/lib/libcpu/powerpc/mpc5xx/timer/timer.c
+++ b/c/src/lib/libcpu/powerpc/mpc5xx/timer/timer.c
@@ -1,70 +1,118 @@
 /*  timer.c
  *
- *  This file manages the benchmark timer used by the RTEMS Timing Test
- *  Suite.  Each measured time period is demarcated by calls to
- *  Timer_initialize() and Read_timer().  Read_timer() usually returns
- *  the number of microseconds since Timer_initialize() exitted.
+ *  This file manages the interval timer on the PowerPC MPC5xx.
+ *  NOTE: This is not the PIT, but rather the RTEMS interval
+ *        timer
+ *  We shall use the bottom 32 bits of the timebase register,
  *
+ *  The following was in the 403 version of this file. I don't
+ *  know what it means. JTM 5/19/98
  *  NOTE: It is important that the timer start/stop overhead be
  *        determined when porting or modifying this code.
  *
- *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
+ *
+ *  MPC5xx port sponsored by Defence Research and Development Canada - Suffield
+ *  Copyright (C) 2004, Real-Time Systems Inc. (querbach@realtime.bc.ca)
+ *
+ *  Derived from c/src/lib/libcpu/powerpc/mpc8xx/timer/timer.c:
+ *
+ *  Author: Jay Monkman (jmonkman@frasca.com)
+ *  Copywright (C) 1998 by Frasca International, Inc.
+ *
+ *  Derived from c/src/lib/libcpu/ppc/ppc403/timer/timer.c:
+ *
+ *  Author:     Andrew Bray <andy@i-cubed.co.uk>
+ *
+ *  COPYRIGHT (c) 1995 by i-cubed ltd.
+ *
+ *  To anyone who acknowledges that this file is provided "AS IS"
+ *  without any express or implied warranty:
+ *      permission to use, copy, modify, and distribute this file
+ *      for any purpose is hereby granted without fee, provided that
+ *      the above copyright notice and this notice appears in all
+ *      copies, and that the name of i-cubed limited not be used in
+ *      advertising or publicity pertaining to distribution of the
+ *      software without specific, written prior permission.
+ *      i-cubed limited makes no representations about the suitability
+ *      of this software for any purpose.
+ *
+ *  Derived from c/src/lib/libcpu/hppa1_1/timer/timer.c:
+ *
+ *  COPYRIGHT (c) 1989-1998.
  *  On-Line Applications Research Corporation (OAR).
- *  All rights assigned to U.S. Government, 1994.
  *
- *  This material may be reproduced by or for the U.S. Government pursuant
- *  to the copyright license under the clause at DFARS 252.227-7013.  This
- *  notice must appear in all copies of this file and its derivatives.
+ *  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.
  *
- *  timer.c,v 1.2 1995/05/31 16:56:39 joel Exp
+ *  $Id$
  */
 
 #include <rtems.h>
+#include <mpc5xx.h>
+
+static volatile rtems_unsigned32 Timer_starting;
+static rtems_boolean Timer_driver_Find_average_overhead;
+
+/*
+ *  This is so small that this code will be reproduced where needed.
+ */
+static inline rtems_unsigned32 get_itimer(void)
+{
+   rtems_unsigned32 ret;
 
-rtems_boolean Timer_driver_Find_average_overhead;
+   asm volatile ("mftb %0" : "=r" ((ret))); /* TBLO */
 
-static unsigned int volatile lastInitValue;
+   return ret;
+}
 
-void Timer_initialize( void )
+void Timer_initialize(void)
 {
-  asm volatile( " mftb %0": "=r" (lastInitValue) );
+  /* set interrupt level and enable timebase. This should never */
+  /*  generate an interrupt however. */
+  usiu.tbscrk = USIU_UNLOCK_KEY;
+  usiu.tbscr |= USIU_TBSCR_TBIRQ(4) 	/* interrupt priority level */
+              | USIU_TBSCR_TBF 		/* freeze timebase during debug */
+              | USIU_TBSCR_TBE;		/* enable timebase */
+  usiu.tbscrk = 0;
+  
+  Timer_starting = get_itimer();
 }
 
-/*
- *  The following controls the behavior of Read_timer().
- *
- *  AVG_OVEREHAD is the overhead for starting and stopping the timer.  It
- *  is usually deducted from the number returned.
- *
- *  LEAST_VALID is the lowest number this routine should trust.  Numbers
- *  below this are "noise" and zero is returned.
- */
+#ifndef  rtems_cpu_configuration_get_timer_least_valid
+#define  rtems_cpu_configuration_get_timer_least_valid() 0
+#endif
 
-#define AVG_OVERHEAD      0  /* It typically takes X.X microseconds */
-                             /* (Y countdowns) to start/stop the timer. */
-                             /* This value is in microseconds. */
-#define LEAST_VALID       1  /* Don't trust a clicks value lower than this */
+#ifndef  rtems_cpu_configuration_get_timer_average_overhead
+#define  rtems_cpu_configuration_get_timer_average_overhead() 0
+#endif
 
-int Read_timer( void )
+int Read_timer(void)
 {
-  uint32_t   value;
-  asm volatile ( " mftb %0": "=r" (value) );
-  return value - lastInitValue;
-}
+  rtems_unsigned32 clicks;
+  rtems_unsigned32 total;
 
-/*
- *  Empty function call used in loops to measure basic cost of looping
- *  in Timing Test Suite.
- */
+  clicks = get_itimer();
+
+  total = clicks - Timer_starting;
+
+  if ( Timer_driver_Find_average_overhead == 1 )
+    return total;          /* in XXX microsecond units */
+
+  else {
+    if ( total < rtems_cpu_configuration_get_timer_least_valid() ) {
+      return 0;            /* below timer resolution */
+    }
+    return (total - rtems_cpu_configuration_get_timer_average_overhead());
+  }
+}
 
-rtems_status_code Empty_function( void )
+rtems_status_code Empty_function(void)
 {
   return RTEMS_SUCCESSFUL;
 }
 
-void Set_find_average_overhead(
-  rtems_boolean find_flag
-)
+void Set_find_average_overhead(rtems_boolean find_flag)
 {
   Timer_driver_Find_average_overhead = find_flag;
 }
diff --git a/c/src/lib/libcpu/powerpc/mpc5xx/vectors/vectors.S b/c/src/lib/libcpu/powerpc/mpc5xx/vectors/vectors.S
new file mode 100644
index 0000000000..125e3f60a4
--- /dev/null
+++ b/c/src/lib/libcpu/powerpc/mpc5xx/vectors/vectors.S
@@ -0,0 +1,203 @@
+/*
+ * vectors.S
+ *
+ *  This file contains the assembly code for the PowerPC exception veneers
+ *  for RTEMS.
+ *
+ *
+ *  MPC5xx port sponsored by Defence Research and Development Canada - Suffield
+ *  Copyright (C) 2004, Real-Time Systems Inc. (querbach@realtime.bc.ca)
+ *
+ *  Derived from libbsp/powerpc/mbx8xx/vectors/vectors.S,
+ *
+ *  (c) 1999, Eric Valette valette@crf.canon.fr
+ *
+ *  $Id$
+ */
+	
+#include <asm.h>
+#include <rtems/score/cpu.h>
+#include <libcpu/vectors.h>
+
+#define SYNC \
+	sync; \
+	isync
+	
+
+/*
+ * Hardware exception vector table.
+ *
+ * The MPC555 can be configured to use a compressed vector table with 8
+ * bytes per entry, rather than the usual 0x100 bytes of other PowerPC
+ * devices.  The following macro uses this feature to save the better part
+ * of 8 kbytes of flash ROM.
+ *
+ * Each vector table entry has room for only a simple branch instruction
+ * which branches to a prologue specific to that exception.  This
+ * exception-specific prologue begins the context save, loads the exception
+ * number into a register, and jumps to a common exception prologue, below.
+ */
+
+	.macro	vectors	num=0, total=NUM_EXCEPTIONS  /* create vector table */
+
+/* vector table entry */
+	.section .vectors, "ax"
+
+	ba	specific_prologue\@		/* run specific prologue */
+	.long	0				/* each entry is 8 bytes */
+
+/* exception-specific prologue */
+	.text
+
+specific_prologue\@:
+	stwu    r1, -EXCEPTION_FRAME_END(r1)	/* open stack frame */
+	stw	r4, GPR4_OFFSET(r1)		/* preserve register */
+	li	r4, \num			/* get exception number */
+	b	common_prologue			/* run common prologue */
+
+/* invoke macro recursively to create remainder of table */
+	.if	\total - (\num + 1)
+	vectors	"(\num + 1)", \total
+	.endif
+
+	.endm
+
+
+/* invoke macro to create entire vector table */
+	vectors
+
+
+/*
+ * Common exception prologue.
+ *
+ * Because the MPC555 vector table is in flash ROM, it's not possible to
+ * change the exception handlers by overwriting them at run-time, so this
+ * common exception prologue uses a table of exception handler pointers to
+ * provide equivalent flexibility.
+ *
+ * When the actual exception handler is run, R1 points to the base of a new
+ * exception stack frame, in which R3, R4 and LR have been saved.  R4 holds
+ * the exception number.
+ */
+	.text
+
+common_prologue:
+	stw	r3, GPR3_OFFSET(r1)		/* preserve registers */
+	mflr	r3
+	stw	r3, EXC_LR_OFFSET(r1)
+
+	slwi	r3, r4, 2				/* make table offset */
+	addis	r3, r3, exception_handler_table@ha	/* point to entry */
+	addi	r3, r3, exception_handler_table@l
+	lwz	r3, 0(r3)				/* get entry */
+	mtlr	r3					/* run it */
+	blr
+	
+
+/*
+ * Default exception handler.
+ *
+ * The function initialize_exceptions() initializes all of the entries in
+ * the exception handler table with pointers to this routine, which saves
+ * the remainder of the interrupted code's state, then calls
+ * C_default_exception_handler() to dump registers.
+ *
+ * On entry, R1 points to a new exception stack frame in which R3, R4, and
+ * LR have been saved.  R4 holds the exception number.
+ */
+	.text
+		
+PUBLIC_VAR(default_exception_handler)
+SYM (default_exception_handler):
+	/*
+	 * Save the interrupted code's program counter and MSR.  Beyond this
+	 * point, all exceptions are recoverable.  Use an RCPU-specific SPR
+	 * to set the RI bit in the MSR to indicate the recoverable state.
+	 */
+	mfsrr0  r3
+	stw	r3, SRR0_FRAME_OFFSET(r1)
+	mfsrr1  r3
+	stw	r3, SRR1_FRAME_OFFSET(r1)
+
+	mtspr	eid, r3			/* set MSR[RI], clear MSR[EE] */
+	SYNC
+
+	/*
+	 * Save the remainder of the general-purpose registers.
+	 *
+	 * Compute the value of R1 at exception entry before storing it in
+	 * the frame.
+	 *
+	 * Note that R2 should never change (it's the EABI pointer to
+	 * .sdata2), but we save it just in case.  
+	 *
+	 * Recall that R3 and R4 were saved by the specific- and
+	 * common-exception handlers before entry to this routine.
+	 */
+	stw	r0, GPR0_OFFSET(r1)
+        addi    r0, r1, EXCEPTION_FRAME_END
+        stw     r0, GPR1_OFFSET(r1)
+	stw	r2, GPR2_OFFSET(r1)
+	stmw	r5, GPR5_OFFSET(r1)		/* save R5 to R31 */
+
+	/*
+	 * Save the remainder of the UISA special-purpose registers.  Recall
+	 * that LR was saved before entry.
+	 */
+	mfcr	r0
+	stw	r0,  EXC_CR_OFFSET(r1)
+	mfctr	r0
+	stw	r0,  EXC_CTR_OFFSET(r1)
+	mfxer	r0
+	stw	r0,  EXC_XER_OFFSET(r1)
+
+	/*
+	 * Call C-language portion of the default exception handler, passing
+	 * in the address of the frame.  
+	 *
+	 * To simplify things a bit, we assume that the target routine is
+	 * within +/- 32 Mbyte from here, which is a reasonable assumption
+	 * on the MPC555.
+	 */
+	stw	r4, EXCEPTION_NUMBER_OFFSET(r1)	/* save exception number */
+	addi	r3, r1, 0x8			/* get frame address */
+	bl	C_default_exception_handler	/* call handler */
+
+	/*
+	 * Restore UISA special-purpose registers.
+	 */
+	lwz	r0,  EXC_XER_OFFSET(r1)
+	mtxer	r0
+	lwz	r0,  EXC_CTR_OFFSET(r1)
+	mtctr	r0
+	lwz	r0,  EXC_CR_OFFSET(r1)
+	mtcr	r0
+	lwz	r0,  EXC_LR_OFFSET(r1)
+	mtlr	r0
+
+	/*
+	 * Restore most general-purpose registers.
+	 */
+	lmw	r2, GPR2_OFFSET(r1)
+
+	/*
+	 * Restore the interrupted code's program counter and MSR, but first
+	 * use an RCPU-specific special-purpose register to clear the RI
+	 * bit, indicating that exceptions are temporarily non-recoverable.
+	 */
+	mtspr	nri, r0			/* clear MSR[RI] */
+	SYNC
+
+	lwz	r0, SRR1_FRAME_OFFSET(r1)
+	mtsrr1	r0
+	lwz	r0, SRR0_FRAME_OFFSET(r1)
+	mtsrr0	r0
+	
+	/*
+	 * Restore the final GPR, close the stack frame, and return to the
+	 * interrupted code.
+	 */
+	lwz	r0, GPR0_OFFSET(r1)
+	addi 	r1, r1, EXCEPTION_FRAME_END
+	SYNC
+	rfi
diff --git a/c/src/lib/libcpu/powerpc/mpc5xx/vectors/vectors.h b/c/src/lib/libcpu/powerpc/mpc5xx/vectors/vectors.h
new file mode 100644
index 0000000000..ce1d3fca17
--- /dev/null
+++ b/c/src/lib/libcpu/powerpc/mpc5xx/vectors/vectors.h
@@ -0,0 +1,156 @@
+/* 
+ * vectors.h Exception frame related contant and API.
+ *
+ *  This include file describe the data structure and the functions implemented
+ *  by rtems to handle exceptions.
+ *
+ *
+ *  MPC5xx port sponsored by Defence Research and Development Canada - Suffield
+ *  Copyright (C) 2004, Real-Time Systems Inc. (querbach@realtime.bc.ca)
+ *
+ *  Derived from libbsp/powerpc/mbx8xx/vectors/vectors.h:
+ *
+ *  CopyRight (C) 1999 valette@crf.canon.fr
+ *
+ *  The license and distribution terms for this file may be
+ *  found in found in the file LICENSE in this distribution or at
+ *  http://www.rtems.com/license/LICENSE.
+ *
+ *  $Id$
+ */
+#ifndef LIBCPU_POWERPC_MBX5XX_VECTORS_H
+#define LIBCPU_POWERPC_MBX5XX_VECTORS_H
+
+
+/*
+ * Size of hardware vector table.
+ */
+#define NUM_EXCEPTIONS		0x20
+
+/*
+ * The callee (high level exception code written in C) 
+ * will store the Link Registers (return address) at entry r1 + 4 !!!.
+ * So let room for it!!!.
+ */ 
+#define LINK_REGISTER_CALLEE_UPDATE_ROOM 4
+#define SRR0_FRAME_OFFSET 8
+#define SRR1_FRAME_OFFSET 12
+#define EXCEPTION_NUMBER_OFFSET 16
+#define GPR0_OFFSET 20
+#define GPR1_OFFSET 24
+#define GPR2_OFFSET 28
+#define GPR3_OFFSET 32
+#define GPR4_OFFSET 36
+#define GPR5_OFFSET 40
+#define GPR6_OFFSET 44
+#define GPR7_OFFSET 48
+#define GPR8_OFFSET 52
+#define GPR9_OFFSET 56
+#define GPR10_OFFSET 60
+#define GPR11_OFFSET 64
+#define GPR12_OFFSET 68
+#define GPR13_OFFSET 72
+#define GPR14_OFFSET 76
+#define GPR15_OFFSET 80
+#define GPR16_OFFSET 84
+#define GPR17_OFFSET 88
+#define GPR18_OFFSET 92
+#define GPR19_OFFSET 96
+#define GPR20_OFFSET 100
+#define GPR21_OFFSET 104
+#define GPR22_OFFSET 108
+#define GPR23_OFFSET 112
+#define GPR24_OFFSET 116
+#define GPR25_OFFSET 120
+#define GPR26_OFFSET 124
+#define GPR27_OFFSET 128
+#define GPR28_OFFSET 132
+#define GPR29_OFFSET 136
+#define GPR30_OFFSET 140
+#define GPR31_OFFSET 144
+#define EXC_CR_OFFSET 148
+#define EXC_CTR_OFFSET 152
+#define EXC_XER_OFFSET 156
+#define EXC_LR_OFFSET 160
+#define EXC_DAR_OFFSET 164
+/*
+ * maintain the EABI requested 8 bytes aligment
+ * As SVR4 ABI requires 16, make it 16 (as some
+ * exception may need more registers to be processed...)
+ */
+#define    EXCEPTION_FRAME_END 176
+
+#ifndef ASM
+/*
+ * default raw exception handlers
+ */
+
+extern	void default_exception_vector_code_prolog();
+extern	int  default_exception_vector_code_prolog_size;
+extern  void initialize_exceptions();
+
+typedef struct {
+  unsigned 	EXC_SRR0;
+  unsigned 	EXC_SRR1;
+  unsigned	_EXC_number;
+  unsigned	GPR0;
+  unsigned	GPR1;
+  unsigned	GPR2;
+  unsigned	GPR3;
+  unsigned	GPR4;
+  unsigned	GPR5;
+  unsigned	GPR6;
+  unsigned	GPR7;
+  unsigned	GPR8;
+  unsigned	GPR9;
+  unsigned	GPR10;
+  unsigned	GPR11;
+  unsigned	GPR12;
+  unsigned	GPR13;
+  unsigned	GPR14;
+  unsigned	GPR15;
+  unsigned	GPR16;
+  unsigned	GPR17;
+  unsigned	GPR18;
+  unsigned	GPR19;
+  unsigned	GPR20;
+  unsigned	GPR21;
+  unsigned	GPR22;
+  unsigned	GPR23;
+  unsigned	GPR24;
+  unsigned	GPR25;
+  unsigned	GPR26;
+  unsigned	GPR27;
+  unsigned	GPR28;
+  unsigned	GPR29;
+  unsigned	GPR30;
+  unsigned	GPR31;
+  unsigned 	EXC_CR;
+  unsigned 	EXC_CTR;
+  unsigned 	EXC_XER;
+  unsigned	EXC_LR;
+  unsigned 	EXC_MSR;
+  unsigned	EXC_DAR;
+}CPU_Exception_frame;
+
+
+typedef void rtems_exception_handler_t (CPU_Exception_frame* excPtr);
+/*DEBUG typedef rtems_exception_handler_t cpuExcHandlerType; */
+
+/*
+ * Exception handler table.
+ *
+ * This table contains pointers to assembly-language exception handlers. 
+ * The common exception prologue in vectors.S looks up an entry in this
+ * table and jumps to it.  No return address is saved, so the handlers in
+ * this table must return directly to the interrupted code.
+ *
+ * On entry to an exception handler, R1 points to a new exception stack
+ * frame in which R3, R4, and LR have been saved.  R4 holds the exception
+ * number.
+ */
+extern rtems_exception_handler_t* exception_handler_table[NUM_EXCEPTIONS];
+
+#endif /* ASM */
+
+#endif /* LIBCPU_POWERPC_MPC5XX_VECTORS_H */
diff --git a/c/src/lib/libcpu/powerpc/mpc5xx/vectors/vectors_init.c b/c/src/lib/libcpu/powerpc/mpc5xx/vectors/vectors_init.c
new file mode 100644
index 0000000000..e5314ee50a
--- /dev/null
+++ b/c/src/lib/libcpu/powerpc/mpc5xx/vectors/vectors_init.c
@@ -0,0 +1,137 @@
+/* 
+ * vectors_init.c Exception hanlding initialisation (and generic handler).
+ *
+ *  This include file describe the data structure and the functions implemented
+ *  by rtems to handle exceptions.
+ *
+ *
+ *  MPC5xx port sponsored by Defence Research and Development Canada - Suffield
+ *  Copyright (C) 2004, Real-Time Systems Inc. (querbach@realtime.bc.ca)
+ *
+ *  Derived from libbsp/powerpc/mbx8xx/vectors/vectors_init.c:
+ *
+ *  CopyRight (C) 1999 valette@crf.canon.fr
+ *
+ *  The license and distribution terms for this file may be
+ *  found in found in the file LICENSE in this distribution or at
+ *  http://www.rtems.com/license/LICENSE.
+ *
+ *  $Id$
+ */
+#include <rtems/bspIo.h>
+#include <libcpu/vectors.h>
+#include <libcpu/raw_exception.h>
+
+extern rtems_exception_handler_t default_exception_handler;
+
+static rtems_raw_except_global_settings exception_config;
+static rtems_raw_except_connect_data    exception_table[NUM_EXCEPTIONS];
+rtems_exception_handler_t* exception_handler_table[NUM_EXCEPTIONS];
+
+
+void C_default_exception_handler(CPU_Exception_frame* excPtr)
+{
+  int recoverable = 0;
+  
+  printk("exception handler called for exception %d\n", excPtr->_EXC_number);
+  printk("\t Next PC or Address of fault = %x\n", excPtr->EXC_SRR0);
+  printk("\t Saved MSR = %x\n", excPtr->EXC_SRR1);
+  printk("\t R0 = %x\n", excPtr->GPR0);
+  printk("\t R1 = %x\n", excPtr->GPR1);
+  printk("\t R2 = %x\n", excPtr->GPR2);
+  printk("\t R3 = %x\n", excPtr->GPR3);
+  printk("\t R4 = %x\n", excPtr->GPR4);
+  printk("\t R5 = %x\n", excPtr->GPR5);
+  printk("\t R6 = %x\n", excPtr->GPR6);
+  printk("\t R7 = %x\n", excPtr->GPR7);
+  printk("\t R8 = %x\n", excPtr->GPR8);
+  printk("\t R9 = %x\n", excPtr->GPR9);
+  printk("\t R10 = %x\n", excPtr->GPR10);
+  printk("\t R11 = %x\n", excPtr->GPR11);
+  printk("\t R12 = %x\n", excPtr->GPR12);
+  printk("\t R13 = %x\n", excPtr->GPR13);
+  printk("\t R14 = %x\n", excPtr->GPR14);
+  printk("\t R15 = %x\n", excPtr->GPR15);
+  printk("\t R16 = %x\n", excPtr->GPR16);
+  printk("\t R17 = %x\n", excPtr->GPR17);
+  printk("\t R18 = %x\n", excPtr->GPR18);
+  printk("\t R19 = %x\n", excPtr->GPR19);
+  printk("\t R20 = %x\n", excPtr->GPR20);
+  printk("\t R21 = %x\n", excPtr->GPR21);
+  printk("\t R22 = %x\n", excPtr->GPR22);
+  printk("\t R23 = %x\n", excPtr->GPR23);
+  printk("\t R24 = %x\n", excPtr->GPR24);
+  printk("\t R25 = %x\n", excPtr->GPR25);
+  printk("\t R26 = %x\n", excPtr->GPR26);
+  printk("\t R27 = %x\n", excPtr->GPR27);
+  printk("\t R28 = %x\n", excPtr->GPR28);
+  printk("\t R29 = %x\n", excPtr->GPR29);
+  printk("\t R30 = %x\n", excPtr->GPR30);
+  printk("\t R31 = %x\n", excPtr->GPR31);
+  printk("\t CR = %x\n", excPtr->EXC_CR);
+  printk("\t CTR = %x\n", excPtr->EXC_CTR);
+  printk("\t XER = %x\n", excPtr->EXC_XER);
+  printk("\t LR = %x\n", excPtr->EXC_LR);
+  printk("\t MSR = %x\n", excPtr->EXC_MSR);
+  if (excPtr->_EXC_number == ASM_DEC_VECTOR)
+       recoverable = 1;
+  if (excPtr->_EXC_number == ASM_SYS_VECTOR)
+#ifdef TEST_RAW_EXCEPTION_CODE      
+    recoverable = 1;
+#else
+    recoverable = 0;
+#endif
+    if (!recoverable) {
+      printk("unrecoverable exception!!! Push reset button\n");
+      while(1);
+    }
+}
+
+void nop_except_enable(const rtems_raw_except_connect_data* ptr)
+{
+}
+
+int except_always_enabled(const rtems_raw_except_connect_data* ptr)
+{
+  return 1;
+}
+
+void initialize_exceptions()
+{
+  int i;
+
+  /*
+   * Initialize all entries of the exception table with a description of the
+   * default exception handler.
+   */
+  exception_config.exceptSize 			= NUM_EXCEPTIONS;
+  exception_config.rawExceptHdlTbl 		= &exception_table[0];
+  exception_config.defaultRawEntry.exceptIndex	= 0;
+  exception_config.defaultRawEntry.hdl.vector	= 0;
+  exception_config.defaultRawEntry.hdl.raw_hdl	= default_exception_handler;
+
+  for (i = 0; i < exception_config.exceptSize; i++) {
+    printk("installing exception number %d\n", i);
+    exception_table[i].exceptIndex	= i;
+    exception_table[i].hdl		= exception_config.defaultRawEntry.hdl;
+    exception_table[i].hdl.vector	= i;
+    exception_table[i].on		= nop_except_enable;
+    exception_table[i].off		= nop_except_enable;
+    exception_table[i].isOn		= except_always_enabled;
+  }
+
+  /*
+   * Now pass the initialized exception table to the exceptions module which
+   * will install the handler pointers in the exception handler table.
+   */
+  if (!mpc5xx_init_exceptions(&exception_config)) {
+    /*
+     * At this stage we may not call CPU_Panic because it uses exceptions!!!
+     */
+    printk("Exception handling initialization failed\n");
+    printk("System locked\n"); while(1);
+  }
+  else {
+    printk("Exception handling initialization done\n");
+  }
+}
author	Joel Sherrill <joel.sherrill@OARcorp.com>	2004-04-12 22:04:28 +0000
committer	Joel Sherrill <joel.sherrill@OARcorp.com>	2004-04-12 22:04:28 +0000
commit	8430205c224c1bfcb67156e5b97dd44ecd81fd7d (patch)
tree	5ce5170ec6f228407d7ebfab0c1efbf17c495595 /c/src/lib/libcpu/powerpc/mpc5xx
parent	2004-04-12 David Querbach <querbach@realtime.bc.ca> (diff)
download	rtems-8430205c224c1bfcb67156e5b97dd44ecd81fd7d.tar.bz2