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

1 files changed, 139 insertions, 0 deletions

diff --git a/c/src/lib/libbsp/sh/gensh2/include/bsp.h b/c/src/lib/libbsp/sh/gensh2/include/bsp.h
new file mode 100644
index 0000000000..a403a44ecb
--- /dev/null
+++ b/c/src/lib/libbsp/sh/gensh2/include/bsp.h
@@ -0,0 +1,139 @@
+/*
+ *  This include file contains all board IO definitions.
+ *
+ *  generic sh2
+ *
+ *  Author: Ralf Corsepius (corsepiu@faw.uni-ulm.de)
+ *
+ *  COPYRIGHT (c) 1997-1998, FAW Ulm, Germany
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * 
+ *
+ *  COPYRIGHT (c) 1998.
+ *  On-Line Applications Research Corporation (OAR).
+ *  Copyright assigned to U.S. Government, 1994.
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.OARcorp.com/rtems/license.html.
+ *
+ *  Minor adaptations for sh2 by:
+ *  John M. Mills (jmills@tga.com)
+ *  TGA Technologies, Inc.
+ *  100 Pinnacle Way, Suite 140
+ *  Norcross, GA 30071 U.S.A.
+ *
+ *  This modified file may be copied and distributed in accordance
+ *  the above-referenced license. It is provided for critique and
+ *  developmental purposes without any warranty nor representation
+ *  by the authors or by TGA Technologies.
+ *
+ *  $Id$
+ */
+
+#ifndef __gensh2_h
+#define __gensh2_h
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <rtems.h>
+#include <clockdrv.h>
+#include <console.h>
+
+#if 0
+#include <sh/null.h>
+#define BSP_CONSOLE_DEVNAME "/dev/null"
+#define BSP_CONSOLE_DRIVER_TABLE_ENTRY DEVNULL_DRIVER_TABLE_ENTRY
+#else
+#include <sh/sci.h>
+#define BSP_CONSOLE_DEVNAME "/dev/sci1"
+#define BSP_CONSOLE_DRIVER_TABLE_ENTRY DEVSCI_DRIVER_TABLE_ENTRY
+#endif
+
+/*
+ *  Define the time limits for RTEMS Test Suite test durations.
+ *  Long test and short test duration limits are provided.  These
+ *  values are in seconds and need to be converted to ticks for the
+ *  application.
+ *
+ */
+
+#define MAX_LONG_TEST_DURATION       300 /* 5 minutes = 300 seconds */
+#define MAX_SHORT_TEST_DURATION      3   /* 3 seconds */
+
+/*
+ *  Stuff for Time Test 27
+ */
+
+#define MUST_WAIT_FOR_INTERRUPT 0
+
+#define Install_tm27_vector( handler ) \
+{ \
+  rtems_isr_entry ignored ; \
+  rtems_interrupt_catch( (handler), 0, &ignored ) ; \
+}
+
+#define Cause_tm27_intr()
+
+#define Clear_tm27_intr()
+
+#define Lower_tm27_intr()
+
+/* Constants */
+
+/*
+ *  Simple spin delay in microsecond units for device drivers.
+ *  This is very dependent on the clock speed of the target.
+ */
+
+#define delay( microseconds ) CPU_delay(microseconds)
+#define sh_delay( microseconds ) CPU_delay( microseconds )
+
+
+/*
+ * Defined in the linker script 'linkcmds'
+ */
+
+extern unsigned32       HeapStart ;
+extern unsigned32       HeapEnd ;
+extern unsigned32       WorkSpaceStart ;
+extern unsigned32       WorkSpaceEnd ;
+
+extern void *CPU_Interrupt_stack_low ;
+extern void *CPU_Interrupt_stack_high ;
+
+  
+/* miscellaneous stuff assumed to exist */
+
+extern rtems_configuration_table BSP_Configuration;
+
+extern void bsp_cleanup( void );
+
+/*
+ *  Device Driver Table Entries
+ */
+
+/*
+ * We redefine CONSOLE_DRIVER_TABLE_ENTRY to redirect /dev/console
+ */
+#undef CONSOLE_DRIVER_TABLE_ENTRY
+#define CONSOLE_DRIVER_TABLE_ENTRY \
+  BSP_CONSOLE_DRIVER_TABLE_ENTRY, \
+  { console_initialize, console_open, console_close, \
+      console_read, console_write, console_control }
+ 
+/*
+ * NOTE: Use the standard Clock driver entry
+ */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+/* end of include file */