sysdeps/standalone/i960/nindy960/console.c

   1 /* Copyright (C) 1994, 1997 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Joel Sherrill (jsherril@redstone-emh2.army.mil),
   4      On-Line Applications Research Corporation.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <standalone.h>
  22 #include "i960ca.h"
  23
  24 /* Console IO routines for a NINDY960 board. */
  25
  26 /*
  27  *  NINDY_IO( ... )
  28  *
  29  *  Interface to NINDY.
  30  */
  31
  32 #define NINDY_INPUT   0
  33 #define NINDY_OUTPUT  1
  34
  35 void ___NINDY_IO_WRAPPER( void )  /* never called */
  36 {
  37    asm volatile ( "       .text" );
  38    asm volatile ( "       .align 4" );
  39    asm volatile ( "       .globl _NINDY_IO" );
  40    asm volatile ( "_NINDY_IO:" );
  41    asm volatile ( "        calls   0       /* call console routines */" );
  42    asm volatile ( "        ret" );
  43 }
  44
  45 /***** !!!! HOW DO I EXFUN NINDY_IO? !!!! *****/
  46
  47 /* _Console_Putc
  48
  49 This routine transmits a character using NINDY.  */
  50
  51 int
  52 _Console_Putc (ch)
  53      char ch;
  54 {
  55   NINDY_IO( NINDY_OUTPUT, ch );
  56   return( 0 );
  57 }
  58
  59 /* _Console_Getc
  60
  61 This routine reads a character from NINDY and returns it. */
  62
  63 int
  64 _Console_Getc (poll)
  65      int poll;
  66 {
  67   char ch;
  68
  69   if ( poll ) {
  70     /* I don't know how to poll with NINDY */
  71     return -1;
  72   } else {
  73     NINDY_IO( NINDY_INPUT, &ch );
  74     return ch;
  75   }
  76 }