Patch from "John M. Mills" <jmills@tga.com> with subsequent cleanup from

Ralf Corsepius <corsepiu@faw.uni-ulm.de> that adds initial Hitachi SH-2
support to RTEMS.  Ralf's comments are:

    Changes:
    ------
    1. SH-Port:
    * Many files renamed.
    * CONSOLE_DEVNAME  and MHZ defines removed from libcpu.
    * console.c moved to libbsp/sh/shared, build in libbsp/sh/<BSP>/console
      applying VPATH.
    * CONSOLE_DEVNAME made BSP-specific, replacement is defined in bsp.h
    * MHZ define replaced with HZ (extendent resolution) in custom/*.cfg
    * -DHZ=HZ  used in bspstart.c, only
    * Makefile variable HZ used in bsp-dependent directories only.

    2. SH1-Port
    * clock-driver rewritten to provide better resolution for odd CPU
      frequencies. This driver is only partially tested on hardware, ie.
      sightly experimental, but I don't expect severe problems with it.
    * Polling SCI-driver added. This driver is experimental and completly
      untested yet. Therefore it is not yet used for the console (/dev/console
      is still pointing to /dev/null, cf. gensh1/bsp.h).
    * minor changes to the timer driver
    * SH1 specific delay()/CPU_delay() now is implemented as a function

    3. SH2-Port
    * Merged
    * IMO, the code is still in its infancy. Therefore I have interspersed
      comments (FIXME) it for items which I think John should look after.
    * sci and console drivers partially rewritten and extended (John, I hope
      you don't mind).
    * Copyright notices are not yet adapted

3 files changed, 16 insertions, 4 deletions

diff --git a/cpukit/score/cpu/sh/cpu.c b/cpukit/score/cpu/sh/cpu.c
index cc07552cf0..06f7b9c3d7 100644
--- a/cpukit/score/cpu/sh/cpu.c
+++ b/cpukit/score/cpu/sh/cpu.c
@@ -30,7 +30,7 @@
 #include <rtems/score/sh.h>
 
 
-/* referenced in start.s */
+/* referenced in start.S */
 extern proc_ptr vectab[] ;
 
 proc_ptr vectab[256] ;
diff --git a/cpukit/score/cpu/sh/rtems/score/cpu.h b/cpukit/score/cpu/sh/rtems/score/cpu.h
index 8a18848f09..dedd11c055 100644
--- a/cpukit/score/cpu/sh/rtems/score/cpu.h
+++ b/cpukit/score/cpu/sh/rtems/score/cpu.h
@@ -377,6 +377,7 @@ typedef struct {
   void *     (*stack_allocate_hook)( unsigned32 );
   void       (*stack_free_hook)( void* );
   /* end of fields required on all CPUs */
+  unsigned32	clicks_per_second ; /* cpu frequency in Hz */
 }   rtems_cpu_table;
 
 /*
@@ -388,8 +389,9 @@ typedef struct {
  *  Macros to access SH specific additions to the CPU Table
  */
 
-/* There are no CPU specific additions to the CPU Table for this port. */
-
+#define rtems_cpu_configuration_get_clicks_per_second() \
+  (_CPU_Table.clicks_per_second)
+   
 /*
  *  This variable is optional.  It is used on CPUs on which it is difficult
  *  to generate an "uninitialized" FP context.  It is filled in by
@@ -434,6 +436,7 @@ SCORE_EXTERN void           (*_CPU_Thread_dispatch_pointer)();
  */
 
 /* XXX: if needed, put more variables here */
+SCORE_EXTERN void CPU_delay( unsigned32 microseconds );
 
 /*
  *  The size of the floating point context area.  On some CPUs this
@@ -637,7 +640,7 @@ SCORE_EXTERN void _CPU_Context_Initialize(
  *
  *  Other models include (1) not doing anything, and (2) putting
  *  a "null FP status word" in the correct place in the FP context.
- *  SH has no FPU !!!!!!!!!!!!
+ *  SH1, SH2, SH3 have no FPU, but the SH3e and SH4 have.
  */
 
 #define _CPU_Context_Initialize_fp( _destination ) \
diff --git a/cpukit/score/cpu/sh/rtems/score/sh.h b/cpukit/score/cpu/sh/rtems/score/sh.h
index 96e10bfb1b..45228c5fe0 100644
--- a/cpukit/score/cpu/sh/rtems/score/sh.h
+++ b/cpukit/score/cpu/sh/rtems/score/sh.h
@@ -42,7 +42,16 @@ extern "C" {
 #if defined(sh7032)
 
 #define CPU_MODEL_NAME  "SH 7032"
+#define SH_HAS_FPU 	0
+
+/*
+ * If the following macro is set to 0 there will be no software irq stack
+ */
+#define SH_HAS_SEPARATE_STACKS 1
+
+#elif defined (sh7045)
 
+#define CPU_MODEL_NAME  "SH 7045"
 #define SH_HAS_FPU 	0
 
 /*