Initial revision

sysdeps/standalone/m68k/m68020/mvme136/brdinit.c

@@ -0,0 +1,53 @@
+/* Copyright (C) 1994 Free Software Foundation, Inc.
+   Contributed by Joel Sherrill (jsherril@redstone-emh2.army.mil),
+     On-Line Applications Research Corporation.
+ 
+This file is part of the GNU C Library.
+ 
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+ 
+The GNU C Library 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.  See the GNU
+Library General Public License for more details.
+ 
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#include <standalone.h>
+#include "__m68020.h"
+
+/*  _Board_Initialize()
+
+This routine initializes the Motorola MVME135/MVME136.  */
+
+void 
+DEFUN_VOID(_Board_Initialize)
+{
+  mc68020_isr *monitors_vector_table;
+  int          index;
+ 
+  monitors_vector_table = (mc68020_isr *)0;   /* 135Bug Vectors are at 0 */
+  set_vbr( monitors_vector_table );
+
+  for ( index=2 ; index<=255 ; index++ )
+    M68Kvec[ index ] = monitors_vector_table[ 32 ];
+
+  M68Kvec[  2 ] = monitors_vector_table[  2 ];   /* bus error vector */
+  M68Kvec[  4 ] = monitors_vector_table[  4 ];   /* breakpoints vector */
+  M68Kvec[  9 ] = monitors_vector_table[  9 ];   /* trace vector */
+  M68Kvec[ 47 ] = monitors_vector_table[ 47 ];   /* system call vector */
+
+  set_vbr( &M68Kvec );
+
+  (*(unsigned char *)0xfffb0067) = 0x7f; /* make VME access round-robin */
+
+  enable_caching();
+
+}

sysdeps/standalone/m68k/m68020/mvme136/console.c

@@ -0,0 +1,101 @@
+/* Copyright (C) 1994 Free Software Foundation, Inc.
+   Contributed by Joel Sherrill (jsherril@redstone-emh2.army.mil),
+     On-Line Applications Research Corporation.
+ 
+This file is part of the GNU C Library.
+ 
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+ 
+The GNU C Library 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.  See the GNU
+Library General Public License for more details.
+ 
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#include <standalone.h>
+#include "__m68020.h"
+
+/* Console IO routines for a Motorola MVME135/MVME136 board.
+   
+They currently use the B port.  It should be possible to
+use the A port by filling in the reset of the chip structure,
+adding an ifdef for PORTA/PORTB, and switching the addresses,
+and maybe the macroes based on the macro. */
+
+/* M68681 DUART chip register structures and constants */
+
+typedef struct {
+  volatile unsigned char fill1[ 5 ];     /* channel A regs ( not used ) */
+  volatile unsigned char isr;            /* interrupt status reg */
+  volatile unsigned char fill2[ 2 ];     /* counter regs (not used) */
+  volatile unsigned char mr1mr2b;        /* MR1B and MR2B regs */
+  volatile unsigned char srb;            /* status reg channel B */
+  volatile unsigned char fill3;          /* do not access */
+  volatile unsigned char rbb;            /* receive buffer channel B */
+  volatile unsigned char ivr;            /* interrupt vector register */
+} r_m681_info;
+
+typedef struct {
+  volatile unsigned char fill1[ 4 ];     /* channel A regs (not used) */
+  volatile unsigned char acr;            /* auxillary control reg */
+  volatile unsigned char imr;            /* interrupt mask reg */
+  volatile unsigned char fill2[ 2 ];     /* counter regs (not used) */
+  volatile unsigned char mr1mr2b;        /* MR1B and MR2B regs */
+  volatile unsigned char csrb;           /* clock select reg */
+  volatile unsigned char crb;            /* command reg */
+  volatile unsigned char tbb;            /* transmit buffer channel B */
+  volatile unsigned char ivr;            /* interrupt vector register */
+} w_m681_info;
+
+#define RD_M68681     ((r_m681_info *)0xfffb0040)   /* ptr to the M68681 */
+#define WR_M68681     ((w_m681_info *)0xfffb0040)   /* ptr to the M68681 */
+#define RXRDYB        0x01               /* status reg recv ready mask */
+#define TXRDYB        0x04               /* status reg trans ready mask */
+
+/* _Console_Putc
+
+This routine transmits a character out the M68681.  It supports
+XON/XOFF flow control.  */
+
+#define XON             0x11            /* control-Q */
+#define XOFF            0x13            /* control-S */
+
+int
+DEFUN( _Console_Putc, (ch), char ch )
+{
+  while ( ! (RD_M68681->srb & TXRDYB) ) ;
+  while ( RD_M68681->srb & RXRDYB )        /* must be an XOFF */
+    if ( RD_M68681->rbb == XOFF ) 
+      do {
+        while ( ! (RD_M68681->srb & RXRDYB) ) ;
+      } while ( RD_M68681->rbb != XON ); 
+
+  WR_M68681->tbb = ch;
+  return( 0 );
+}
+
+/* _Console_Getc
+
+This routine reads a character from the UART and returns it. */
+
+int
+DEFUN( _Console_Getc, (poll), int poll )
+{
+  if ( poll ) {
+    if ( !(RD_M68681->srb & RXRDYB) ) 
+      return -1;
+    else
+      return RD_M68681->rbb;
+  } else {
+    while ( !(RD_M68681->srb & RXRDYB) );
+    return RD_M68681->rbb;
+  }
+}