f729d722a50326b0bdd835ceb17ae94c0c008edb
1 /* Remote serial interface for GO32, for GDB, the GNU Debugger.
2 Copyright 1992 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program 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
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
20 /* This file shows most of the obvious problems of code written for
21 the IBM PC. FIXME. -- gnu@cygnus.com, Sep92 */
28 #define SIGNATURE 0x4154
34 #define dprintf if(0)printf
38 #define peek(a,b) (*(unsigned short *)(0xe0000000 + (a)*16 + (b)))
52 static ASYNC_STRUCT far
*async
;
68 static int mono_pos
=0;
73 mono_put(char byte
, char attr
)
75 ScreenSecondary
[320+mono_pos
+80] = 0x0720;
76 ScreenSecondary
[320+mono_pos
] = (attr
<<8) | (byte
&0xff);
77 mono_pos
= (mono_pos
+1) % 1200;
86 return (char *)((unsigned)async
- OFFSET
+ p
);
88 return (char far
*)MK_FP(FP_SEG(async
), p
);
92 static ASYNC_STRUCT far
*
97 if (peek(0, which
*4) != OFFSET
)
100 a
= (ASYNC_STRUCT
*)(0xe0000000 + peek(0, which
*4+2)*16 + peek(0, which
*4));
103 a
= (ASYNC_STRUCT far
*)MK_FP(peek(0,which
*4+2),peek(0,which
*4));
105 if (a
->signature
!= SIGNATURE
)
107 if (a
->version
!= VERSION
)
116 ASYNC_STRUCT far
*a1
;
117 ASYNC_STRUCT far
*a2
;
134 error("GDB can not connect to asynctsr program, check that it is installed\n\
135 and that serial I/O is not being redirected (perhaps by NFS)\n\n\
136 example configuration:\n\
137 C> mode com2:9600,n,8,1,p\n\
143 outportb(com_ier
, 0x0f);
144 outportb(com_bfr
, 0x03);
145 outportb(com_mcr
, 0x0b);
146 async
->getp
= async
->putp
= async
->buffer_start
;
149 for (i
=0; i
<1200; i
++)
150 ScreenSecondary
[320+i
] = 0x0720;
161 dprintf("dos_async_tx: enter %x - with IOV %x", c
, com_lsr
);
163 while (~inportb(com_lsr
) & 0x20);
166 mono_put(c
, mono_tx
);
174 return (async
->getp
!= async
->putp
);
181 dprintf("dos_async_rx: enter - ");
183 while (!dos_async_ready())
189 dprintf("async=%x getp=%x\n", async
, async
->getp
);
191 rv
= *aptr(async
->getp
++);
193 mono_put(rv
, mono_rx
);
195 if (async
->getp
>= async
->buffer_end
)
196 async
->getp
= async
->buffer_start
;
197 dprintf("exit %x\n", rv
);
204 return (peek(0x40,0x1a) != peek(0x40,0x1c));
218 dosasync_read (int fd
, char *buffer
, int length
, int timeout
)
224 dprintf("dosasync_read: enter(%d,%d)\n", length
, timeout
);
229 while (!dos_async_ready())
234 dprintf("dosasync_read: timeout(%d)\n", length
-l
-1);
239 *buffer
++ = dos_async_rx();
241 dprintf("dosasync_read: exit %d\n", length
);
246 dosasync_write(int fd
, const char *buffer
, int length
)
250 dos_async_tx(*buffer
++);
262 if ((*s
>= 'A') && (*s
<= 'Z'))
274 serial_default_name ()
283 /* Always in raw mode */
291 fd
= dos_async_init();
301 if (dosasync_read(fd
, &buf
, 1, to
))
304 return -2; /* Timeout, I guess */
308 serial_setbaudrate (rate
)
315 serial_nextbaudrate (rate
)
322 serial_write (str
, len
)
326 dosasync_write(fd
, str
, len
);