1 /* Remote serial interface for local (hardwired) serial ports for GO32.
2 Copyright 1992, 1993 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. */
24 /* This is unused for now. We just return a placeholder. */
43 static int go32_open PARAMS ((serial_t scb, const char *name));
44 static void go32_raw PARAMS ((serial_t scb));
45 static int go32_readchar PARAMS ((serial_t scb, int timeout));
46 static int go32_setbaudrate PARAMS ((serial_t scb, int rate));
47 static int go32_write PARAMS ((serial_t scb, const char *str, int len));
48 static void go32_close PARAMS ((serial_t scb));
49 static serial_ttystate go32_get_tty_state PARAMS ((serial_t scb));
50 static int go32_set_tty_state PARAMS ((serial_t scb, serial_ttystate state));
51 static char *aptr PARAMS ((short p));
52 static ASYNC_STRUCT *getivec PARAMS ((int which));
53 static int dos_async_init PARAMS ((int port));
54 static void dos_async_tx PARAMS ((const char c));
55 static int dos_async_rx PARAMS (());
56 static int dosasync_read PARAMS ((int fd, char *buf, int len, int timeout));
57 static int dosasync_write PARAMS ((int fd, const char *buf, int len));
59 #define SIGNATURE 0x4154
63 #define peek(a,b) (*(unsigned short *)(0xe0000000 + (a)*16 + (b)))
65 static volatile ASYNC_STRUCT *async;
80 return (char *) ((unsigned) async - OFFSET + p);
88 if (peek (0, which * 4) != OFFSET)
91 a = (ASYNC_STRUCT *) (0xe0000000 + peek (0, which * 4 + 2) * 16 + peek (0, which * 4));
93 if (a->signature != SIGNATURE)
96 if (a->version != VERSION)
103 dos_async_init (port)
109 async = getivec (12);
112 async = getivec (11);
120 error ("GDB cannot connect to asynctsr program, check that it is installed\n\
121 and that serial I/O is not being redirected (perhaps by NFS)\n\n\
122 example configuration:\n\
123 C> mode com%d:9600,n,8,1,p\n\
125 C> gdb \n", port, port);
129 outportb (com_ier, 0x0f);
130 outportb (com_bfr, 0x03);
131 outportb (com_mcr, 0x0b);
132 async->getp = async->putp = async->buffer_start;
141 while (~inportb (com_lsr) & 0x20)
143 outportb (com_tb, c);
146 #define dos_async_ready() (async->getp != async->putp)
153 while (!dos_async_ready ())
157 printf_unfiltered ("abort!\n");
162 rv = *aptr (async->getp++);
163 if (async->getp >= async->buffer_end)
164 async->getp = async->buffer_start;
170 dosasync_read (fd, buf, len, timeout)
180 then = now + timeout;
182 for (i = 0; i < len; i++)
186 while (!dos_async_ready ())
193 *buf++ = dos_async_rx ();
199 dosasync_write (fd, buf, len)
206 for (l = 0; l < len; l++)
207 dos_async_tx (*buf++);
213 go32_open (scb, name)
219 if (strncasecmp (name, "com", 3) != 0)
225 port = name[3] - '0';
227 if ((port != 1) && (port != 2))
233 scb->fd = dos_async_init (port);
251 /* Always in raw mode */
255 go32_readchar (scb, timeout)
261 /* Shortcut for polling */
264 if (dos_async_ready ())
266 return dos_async_rx ();
268 return SERIAL_TIMEOUT;
271 if (dosasync_read (scb->fd, &buf, 1, timeout))
274 return SERIAL_TIMEOUT;
277 /* go32_{get set}_tty_state() are both dummys to fill out the function
278 vector. Someday, they may do something real... */
280 static serial_ttystate
281 go32_get_tty_state (scb)
284 struct go32_ttystate *state;
286 state = (struct go32_ttystate *) xmalloc (sizeof *state);
288 return (serial_ttystate) state;
292 go32_set_tty_state (scb, ttystate)
294 serial_ttystate ttystate;
300 go32_noflush_set_tty_state (scb, new_ttystate, old_ttystate)
302 serial_ttystate new_ttystate;
303 serial_ttystate old_ttystate;
309 go32_print_tty_state (scb, ttystate)
311 serial_ttystate ttystate;
313 /* Nothing to print. */
318 go32_setbaudrate (scb, rate)
326 go32_write (scb, str, len)
331 dosasync_write (scb->fd, str, len);
342 static struct serial_ops go32_ops =
350 go32_noop, /* flush output */
351 go32_noop, /* flush input */
352 go32_noop, /* send break -- currently used only for nindy */
356 go32_print_tty_state,
357 go32_noflush_set_tty_state,
362 _initialize_ser_go32 ()
364 serial_add_interface (&go32_ops);