* tools/build/.cvsignore, tools/build/ChangeLog,

	tools/build/Makefile.am, tools/build/README, tools/build/binpatch.c,
	tools/build/cklength.c, tools/build/config.h.in,
	tools/build/configure.ac, tools/build/cvsignore-add.sh,
	tools/build/doxy-filter, tools/build/eolstrip.c,
	tools/build/install-if-change.in, tools/build/multigen,
	tools/build/packhex.c, tools/build/rtems-bin2c.c,
	tools/build/search-id.sh, tools/build/unhex.c, tools/cpu/.cvsignore,
	tools/cpu/ChangeLog, tools/cpu/Makefile.am, tools/cpu/configure.ac,
	tools/cpu/generic/.cvsignore, tools/cpu/generic/ChangeLog,
	tools/cpu/generic/Makefile.am, tools/cpu/generic/configure.ac,
	tools/cpu/generic/size_rtems.in, tools/cpu/nios2/.cvsignore,
	tools/cpu/nios2/ChangeLog, tools/cpu/nios2/Makefile.am,
	tools/cpu/nios2/README, tools/cpu/nios2/bridges.c,
	tools/cpu/nios2/bridges.h, tools/cpu/nios2/clocks.c,
	tools/cpu/nios2/clocks.h, tools/cpu/nios2/configure.ac,
	tools/cpu/nios2/devices.c, tools/cpu/nios2/devices.h,
	tools/cpu/nios2/linkcmds.c, tools/cpu/nios2/linkcmds.h,
	tools/cpu/nios2/memory.c, tools/cpu/nios2/memory.h,
	tools/cpu/nios2/nios2gen.c, tools/cpu/nios2/output.c,
	tools/cpu/nios2/output.h, tools/cpu/nios2/ptf.c,
	tools/cpu/nios2/ptf.h, tools/cpu/nios2/sample.ptf,
	tools/cpu/sh/.cvsignore, tools/cpu/sh/AUTHORS, tools/cpu/sh/COPYING,
	tools/cpu/sh/ChangeLog, tools/cpu/sh/Makefile.am, tools/cpu/sh/TODO,
	tools/cpu/sh/configure.ac, tools/cpu/sh/sci.c, tools/cpu/sh/sci.h,
	tools/cpu/sh/shgen.c: New files.

1 files changed, 165 insertions, 0 deletions

diff --git a/tools/cpu/sh/sci.c b/tools/cpu/sh/sci.c
new file mode 100644
index 0000000000..bc7fdd83a8
--- /dev/null
+++ b/tools/cpu/sh/sci.c
@@ -0,0 +1,165 @@
+/*
+ * Copyright (c) 1998 Ralf Corsepius (corsepiu@faw.uni-ulm.de)
+ *
+ * See the file COPYING for copyright notice.
+ */
+
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "sci.h"
+
+/*
+   n .. baudrate generator source 0,1,2,3
+
+   N .. BRR setting (0..255)
+
+   Phi .. processor baud rate
+
+   B .. bitrate
+ */
+
+typedef struct sci_tab {
+  unsigned int  B ;
+  unsigned int  n ;
+  int 		N ;
+  double        err ;
+  } sci_tab_t ;
+
+static unsigned int bitrate [] = {
+  50,
+  75,
+  110,
+  134,
+  150,
+  200,
+  300,
+  600,
+  1200,
+  1800,
+  2400,
+  4800,
+  9600,
+  19200,
+  38400,
+  57600,
+  115200,
+  230400,
+  460800
+};
+
+static sci_tab_t test_array[4] ;
+
+static void Compute(
+  unsigned int n,
+  unsigned int B,
+  double   Phi,
+  struct sci_tab *entry )
+{
+  int    a = ( 32 << ( 2 * n ) ) * B ;
+
+  entry->n = n ;
+  entry->B = B ;
+  entry->N = rint( ( Phi / a ) - 1.0 ) ;
+
+  if ( ( entry->N > 0 ) && ( entry->N < 256 ) )
+    entry->err =
+      ( ( Phi / ( (entry->N + 1) * a ) - 1.0 ) * 100.0 );
+  else
+  {
+    entry->err = 100.0 ;
+    entry->n = 255 ;
+    entry->N = 0 ;
+  }
+}
+
+static sci_tab_t *SelectN(
+  unsigned int 	B,
+  double 	Phi )
+{
+  unsigned int i ;
+  struct sci_tab* best = NULL ;
+
+  for ( i = 0 ; i < 4 ; i++ )
+  {
+    double err ;
+
+    Compute( i, B, Phi, &test_array[i] );
+    err = fabs( test_array[i].err );
+
+    if ( best )
+    {
+      if ( err < fabs( best->err ) )
+        best = &test_array[i] ;
+    }
+    else
+      best = &test_array[i] ;
+  }
+
+  return best ;
+}
+
+int shgen_gensci(
+  FILE		*file,
+  double	Phi ) /* Processor frequency [Hz] */
+{
+  unsigned int i ;
+
+  fprintf( file,
+    "/*\n * Bitrate table for the serial devices (sci) of the SH at %.3f MHz\n"
+    " */\n\n", Phi / 1000000.0 );
+  fprintf( file,
+    "/*\n"
+    " * n     .. SMR bits 0,1 : baud rate generator clock source\n"
+    " * N     .. BRR bits 0..7: setting for baud rate generator\n"
+    " * error .. percentual error to nominal bitrate\n"
+    " *   Hitachi's HW manual recommends bitrates with an error less than 1%%\n"
+    " *   We experienced values less than 2%% to be stable\n"
+    " */\n\n" );
+  fprintf( file, "#include <termios.h>\n\n" );
+  fprintf( file,
+    "static struct sci_bitrate_t {\n"
+    "  unsigned char n ;\n"
+    "  unsigned char N ;\n"
+    "} _sci_bitrates[] = {\n"
+    "/*  n    N      error */\n" );
+
+  for ( i = 0 ; i < sizeof(bitrate)/sizeof(int) ; i++ )
+  {
+    struct sci_tab* best = SelectN( bitrate[i], Phi );
+
+    if ( i > 0 )
+      fprintf( file, ",\n" );
+    fprintf( file, "  { %1d, %3d } /* %+7.2f%% ; B%d ",
+      best->n,
+      best->N,
+      best->err,
+      best->B );
+    if ( best->n > 3 )
+      fprintf( file, "(unusable) " );
+    fprintf( file, "*/" );
+  }
+
+  fprintf( file, "\n};\n\n" );
+
+  fprintf( file,
+    "int _sci_get_brparms( \n"
+    "  tcflag_t      cflag,\n"
+    "  unsigned char *smr,\n"
+    "  unsigned char *brr )\n"
+    "{\n"
+    "  unsigned int offset ;\n\n"
+    "  offset = ( cflag & ( CBAUD & ~CBAUDEX ) )\n"
+    "    + ( ( cflag & CBAUDEX ) ? B38400 : 0 );\n"
+    "  if ( offset == 0 ) return -1 ;\n"
+    "  offset-- ;\n\n"
+    "  if ( _sci_bitrates[offset].n > 3 )  return -1;\n\n"
+    "  *smr &= ~0x03;\n"
+    "  *smr |= _sci_bitrates[offset].n;\n"
+    "  *brr =  _sci_bitrates[offset].N;\n\n"
+    "  return 0;\n"
+    "}\n" );
+
+  return 0 ;
+}