Commit | Line | Data |
---|---|---|
5d2b030a SG |
1 | /* Remote serial interface for local (hardwired) serial ports for GO32. |
2 | Copyright 1992, 1993 Free Software Foundation, Inc. | |
ae0ea72e | 3 | |
08c0d7b8 | 4 | This file is part of GDB. |
ae0ea72e | 5 | |
08c0d7b8 SC |
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. | |
ae0ea72e | 10 | |
08c0d7b8 SC |
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. | |
ae0ea72e | 15 | |
08c0d7b8 SC |
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. */ | |
ae0ea72e | 19 | |
ae0ea72e SC |
20 | #include "defs.h" |
21 | #include "serial.h" | |
5140562f | 22 | #include <sys/dos.h> |
ae0ea72e | 23 | |
aa48187b SC |
24 | #define disable() asm("cli") |
25 | #define enable() asm("sti") | |
26 | ||
38dc5e12 | 27 | struct go32_ttystate |
08c0d7b8 SC |
28 | { |
29 | int bogus; | |
30 | }; | |
08c0d7b8 SC |
31 | typedef struct |
32 | { | |
33 | short jmp_op; | |
34 | short signature; | |
35 | short version; | |
36 | short buffer_start; | |
37 | short buffer_end; | |
38 | short getp; | |
39 | short putp; | |
40 | short iov; | |
aa48187b SC |
41 | short count; |
42 | short overflow; | |
43 | short buffer_size; | |
44 | short ovflushes; | |
08c0d7b8 SC |
45 | } |
46 | ASYNC_STRUCT; | |
452b4b00 | 47 | |
aa48187b SC |
48 | #define AOFF_JMP_OP 0 |
49 | #define AOFF_SIGNATURE 2 | |
50 | #define AOFF_VERSION 4 | |
51 | #define AOFF_BUFFER_START 6 | |
52 | #define AOFF_BUFFER_END 8 | |
53 | #define AOFF_GETP 10 | |
54 | #define AOFF_PUTP 12 | |
55 | #define AOFF_IOV 14 | |
56 | #define AOFF_COUNT 16 | |
57 | #define AOFF_OVERFLOW 18 | |
58 | #define AOFF_BUFFER_SIZE 20 | |
59 | #define AOFF_OVFLUSHES 22 | |
60 | ||
61 | ||
62 | static ASYNC_STRUCT a; /* Copy in our mem of the struct */ | |
63 | static long aindex; /* index into dos space of struct */ | |
64 | ||
38dc5e12 SG |
65 | static int go32_open PARAMS ((serial_t scb, const char *name)); |
66 | static void go32_raw PARAMS ((serial_t scb)); | |
38dc5e12 | 67 | static int go32_readchar PARAMS ((serial_t scb, int timeout)); |
38dc5e12 SG |
68 | static int go32_setbaudrate PARAMS ((serial_t scb, int rate)); |
69 | static int go32_write PARAMS ((serial_t scb, const char *str, int len)); | |
38dc5e12 | 70 | static void go32_close PARAMS ((serial_t scb)); |
452b4b00 | 71 | static serial_ttystate go32_get_tty_state PARAMS ((serial_t scb)); |
38dc5e12 | 72 | static int go32_set_tty_state PARAMS ((serial_t scb, serial_ttystate state)); |
aa48187b SC |
73 | static unsigned char aptr PARAMS ((short p)); |
74 | static unsigned long getivec PARAMS ((int which)); | |
38dc5e12 SG |
75 | static int dos_async_init PARAMS ((int port)); |
76 | static void dos_async_tx PARAMS ((const char c)); | |
38dc5e12 SG |
77 | static int dos_async_rx PARAMS (()); |
78 | static int dosasync_read PARAMS ((int fd, char *buf, int len, int timeout)); | |
452b4b00 | 79 | static int dosasync_write PARAMS ((int fd, const char *buf, int len)); |
38dc5e12 | 80 | |
ae0ea72e SC |
81 | #define SIGNATURE 0x4154 |
82 | #define VERSION 1 | |
83 | #define OFFSET 0x104 | |
84 | ||
aa48187b SC |
85 | unsigned char bb; |
86 | unsigned short sb; | |
87 | unsigned long sl; | |
88 | ||
89 | #define SET_BYTE(x,y) { char _buf = y;dosmemput(&_buf,1, x);} | |
90 | #define SET_WORD(x,y) { short _buf = y;dosmemput(&_buf,2, x);} | |
91 | #define GET_BYTE(x) ( dosmemget((x),1,&bb), bb) | |
92 | ||
93 | ||
94 | #define GET_LONG(x) ( dosmemget((x),4,&sl), sl) | |
95 | ||
96 | static | |
97 | unsigned short | |
98 | GET_WORD (x) | |
99 | { | |
100 | unsigned short sb; | |
101 | dosmemget ((x), 2, &sb); | |
102 | return sb; | |
103 | } | |
104 | ||
105 | static int iov[2]; | |
ae0ea72e | 106 | |
aa48187b SC |
107 | #define com_rb(n) iov[n] |
108 | #define com_tb(n) iov[n] | |
109 | #define com_ier(n) iov[n]+1 | |
110 | #define com_ifr(n) iov[n]+2 | |
111 | #define com_bfr(n) iov[n]+3 | |
112 | #define com_mcr(n) iov[n]+4 | |
113 | #define com_lsr(n) iov[n]+5 | |
114 | #define com_msr(n) iov[n]+6 | |
ae0ea72e | 115 | |
aa48187b | 116 | static unsigned char |
08c0d7b8 | 117 | aptr (p) |
5d2b030a | 118 | short p; |
ae0ea72e | 119 | { |
aa48187b | 120 | return GET_BYTE (aindex - OFFSET + p); |
ae0ea72e SC |
121 | } |
122 | ||
aa48187b | 123 | static unsigned long |
08c0d7b8 | 124 | getivec (int which) |
ae0ea72e | 125 | { |
aa48187b | 126 | long tryaindex; |
ae0ea72e | 127 | |
aa48187b | 128 | if (GET_WORD (which * 4) != OFFSET) |
ae0ea72e | 129 | return 0; |
b83bf6b3 | 130 | |
aa48187b SC |
131 | /* Find out where in memory this lives */ |
132 | tryaindex = GET_WORD (which * 4 + 2) * 16 + GET_WORD (which * 4); | |
ae0ea72e | 133 | |
aa48187b | 134 | if (GET_WORD (tryaindex + 2) != SIGNATURE) |
ae0ea72e | 135 | return 0; |
aa48187b | 136 | if (GET_WORD (tryaindex + 4) != VERSION) |
ae0ea72e | 137 | return 0; |
aa48187b | 138 | return tryaindex; |
ae0ea72e SC |
139 | } |
140 | ||
5d2b030a | 141 | static int |
08c0d7b8 | 142 | dos_async_init (port) |
b83bf6b3 | 143 | int port; |
ae0ea72e | 144 | { |
b83bf6b3 | 145 | switch (port) |
07861607 | 146 | { |
b83bf6b3 | 147 | case 1: |
aa48187b | 148 | aindex = getivec (12); |
b83bf6b3 SG |
149 | break; |
150 | case 2: | |
aa48187b | 151 | aindex = getivec (11); |
b83bf6b3 SG |
152 | break; |
153 | default: | |
154 | return 0; | |
07861607 SG |
155 | } |
156 | ||
aa48187b | 157 | if (!aindex) |
07861607 | 158 | { |
08c0d7b8 | 159 | error ("GDB cannot connect to asynctsr program, check that it is installed\n\ |
ae0ea72e SC |
160 | and that serial I/O is not being redirected (perhaps by NFS)\n\n\ |
161 | example configuration:\n\ | |
a037b21e SG |
162 | C> mode com%d:9600,n,8,1,p\n\ |
163 | C> asynctsr %d\n\ | |
164 | C> gdb \n", port, port); | |
07861607 SG |
165 | } |
166 | ||
aa48187b SC |
167 | iov[0] = GET_WORD (aindex + AOFF_IOV); |
168 | outportb (com_ier (0), 0x0f); | |
169 | outportb (com_bfr (0), 0x03); | |
170 | outportb (com_mcr (0), 0x0b); | |
b83bf6b3 | 171 | return 1; |
ae0ea72e SC |
172 | } |
173 | ||
5d2b030a | 174 | static void |
08c0d7b8 | 175 | dos_async_tx (c) |
5d2b030a | 176 | const char c; |
ae0ea72e | 177 | { |
aa48187b | 178 | while (~inportb (com_lsr (0)) & 0x20) |
08c0d7b8 | 179 | ; |
aa48187b | 180 | outportb (com_tb (0), c); |
ae0ea72e SC |
181 | } |
182 | ||
aa48187b SC |
183 | static int |
184 | dos_async_ready () | |
185 | { | |
186 | int ret; | |
187 | ||
188 | disable (); | |
189 | #if RDY_CNT | |
190 | ret = GET_WORD (aindex + AOFF_COUNT); | |
191 | #else | |
192 | ret = GET_WORD (aindex + AOFF_GETP) != GET_WORD (aindex + AOFF_PUTP); | |
193 | #endif | |
194 | enable (); | |
195 | return ret; | |
196 | ||
197 | ||
198 | } | |
ae0ea72e | 199 | |
5d2b030a | 200 | static int |
08c0d7b8 | 201 | dos_async_rx () |
ae0ea72e SC |
202 | { |
203 | char rv; | |
aa48187b | 204 | short idx; |
5d2b030a | 205 | |
08c0d7b8 SC |
206 | while (!dos_async_ready ()) |
207 | { | |
208 | if (kbhit ()) | |
209 | { | |
210 | printf_unfiltered ("abort!\n"); | |
211 | return 0; | |
212 | } | |
213 | } | |
aa48187b SC |
214 | disable (); |
215 | idx = GET_WORD (aindex + AOFF_GETP); | |
216 | idx++; | |
217 | SET_WORD (aindex + AOFF_GETP, idx); | |
218 | rv = aptr (idx - 1); | |
219 | SET_WORD (aindex + AOFF_COUNT, GET_WORD (aindex + AOFF_COUNT) - 1); | |
220 | if (GET_WORD (aindex + AOFF_GETP) > GET_WORD (aindex + AOFF_BUFFER_END)) | |
221 | SET_WORD (aindex + AOFF_GETP, GET_WORD (aindex + AOFF_BUFFER_START)); | |
222 | enable (); | |
5d2b030a | 223 | return rv; |
ae0ea72e SC |
224 | } |
225 | ||
63eef03a | 226 | |
5d2b030a SG |
227 | static int |
228 | dosasync_read (fd, buf, len, timeout) | |
229 | int fd; | |
230 | char *buf; | |
231 | int len; | |
232 | int timeout; | |
ae0ea72e SC |
233 | { |
234 | long now, then; | |
08c0d7b8 | 235 | int i; |
5d2b030a | 236 | |
ae0ea72e | 237 | time (&now); |
5d2b030a SG |
238 | then = now + timeout; |
239 | ||
08c0d7b8 | 240 | for (i = 0; i < len; i++) |
ae0ea72e | 241 | { |
5d2b030a SG |
242 | if (timeout) |
243 | { | |
08c0d7b8 | 244 | while (!dos_async_ready ()) |
5d2b030a SG |
245 | { |
246 | time (&now); | |
63eef03a | 247 | if (now >= then && timeout > 0) |
08c0d7b8 | 248 | return i; |
5d2b030a SG |
249 | } |
250 | } | |
08c0d7b8 | 251 | *buf++ = dos_async_rx (); |
ae0ea72e | 252 | } |
5d2b030a | 253 | return len; |
ae0ea72e SC |
254 | } |
255 | ||
5d2b030a | 256 | static int |
08c0d7b8 | 257 | dosasync_write (fd, buf, len) |
5d2b030a SG |
258 | int fd; |
259 | const char *buf; | |
260 | int len; | |
261 | { | |
08c0d7b8 | 262 | int l; |
ae0ea72e | 263 | |
08c0d7b8 | 264 | for (l = 0; l < len; l++) |
5d2b030a | 265 | dos_async_tx (*buf++); |
ae0ea72e | 266 | |
5d2b030a | 267 | return len; |
ae0ea72e SC |
268 | } |
269 | ||
5d2b030a SG |
270 | static int |
271 | go32_open (scb, name) | |
272 | serial_t scb; | |
273 | const char *name; | |
b52373a2 | 274 | { |
b83bf6b3 SG |
275 | int port; |
276 | ||
277 | if (strncasecmp (name, "com", 3) != 0) | |
278 | { | |
279 | errno = ENOENT; | |
4febd102 | 280 | return -1; |
b83bf6b3 SG |
281 | } |
282 | ||
283 | port = name[3] - '0'; | |
284 | ||
285 | if ((port != 1) && (port != 2)) | |
286 | { | |
287 | errno = ENOENT; | |
4febd102 | 288 | return -11; |
b83bf6b3 SG |
289 | } |
290 | ||
08c0d7b8 | 291 | scb->fd = dos_async_init (port); |
07861607 | 292 | if (!scb->fd) |
4febd102 | 293 | return -1; |
ae0ea72e | 294 | |
5d2b030a | 295 | return 0; |
ae0ea72e SC |
296 | } |
297 | ||
c2e247c4 | 298 | static int |
704deef2 | 299 | go32_noop (scb) |
c2e247c4 JK |
300 | serial_t scb; |
301 | { | |
c2e247c4 JK |
302 | return 0; |
303 | } | |
304 | ||
5d2b030a SG |
305 | static void |
306 | go32_raw (scb) | |
307 | serial_t scb; | |
ae0ea72e | 308 | { |
5d2b030a | 309 | /* Always in raw mode */ |
ae0ea72e SC |
310 | } |
311 | ||
5d2b030a SG |
312 | static int |
313 | go32_readchar (scb, timeout) | |
314 | serial_t scb; | |
315 | int timeout; | |
ae0ea72e SC |
316 | { |
317 | char buf; | |
5d2b030a | 318 | |
08c0d7b8 SC |
319 | /* Shortcut for polling */ |
320 | if (timeout == 0) | |
321 | { | |
322 | if (dos_async_ready ()) | |
323 | { | |
324 | return dos_async_rx (); | |
325 | } | |
326 | return SERIAL_TIMEOUT; | |
327 | } | |
328 | ||
329 | if (dosasync_read (scb->fd, &buf, 1, timeout)) | |
5a6242dd | 330 | return buf; |
ae0ea72e | 331 | else |
4febd102 | 332 | return SERIAL_TIMEOUT; |
ae0ea72e SC |
333 | } |
334 | ||
38dc5e12 SG |
335 | /* go32_{get set}_tty_state() are both dummys to fill out the function |
336 | vector. Someday, they may do something real... */ | |
337 | ||
338 | static serial_ttystate | |
08c0d7b8 | 339 | go32_get_tty_state (scb) |
38dc5e12 SG |
340 | serial_t scb; |
341 | { | |
342 | struct go32_ttystate *state; | |
343 | ||
08c0d7b8 | 344 | state = (struct go32_ttystate *) xmalloc (sizeof *state); |
38dc5e12 | 345 | |
08c0d7b8 | 346 | return (serial_ttystate) state; |
38dc5e12 SG |
347 | } |
348 | ||
349 | static int | |
08c0d7b8 | 350 | go32_set_tty_state (scb, ttystate) |
38dc5e12 SG |
351 | serial_t scb; |
352 | serial_ttystate ttystate; | |
353 | { | |
38dc5e12 SG |
354 | return 0; |
355 | } | |
356 | ||
c2e247c4 JK |
357 | static int |
358 | go32_noflush_set_tty_state (scb, new_ttystate, old_ttystate) | |
359 | serial_t scb; | |
360 | serial_ttystate new_ttystate; | |
361 | serial_ttystate old_ttystate; | |
362 | { | |
363 | return 0; | |
364 | } | |
365 | ||
366 | static void | |
367 | go32_print_tty_state (scb, ttystate) | |
368 | serial_t scb; | |
369 | serial_ttystate ttystate; | |
370 | { | |
371 | /* Nothing to print. */ | |
372 | return; | |
373 | } | |
374 | ||
5d2b030a SG |
375 | static int |
376 | go32_setbaudrate (scb, rate) | |
377 | serial_t scb; | |
378 | int rate; | |
ae0ea72e SC |
379 | { |
380 | return 0; | |
381 | } | |
382 | ||
5d2b030a SG |
383 | static int |
384 | go32_write (scb, str, len) | |
385 | serial_t scb; | |
386 | const char *str; | |
387 | int len; | |
388 | { | |
08c0d7b8 | 389 | dosasync_write (scb->fd, str, len); |
4febd102 SG |
390 | |
391 | return 0; | |
5d2b030a SG |
392 | } |
393 | ||
394 | static void | |
452b4b00 SG |
395 | go32_close (scb) |
396 | serial_t scb; | |
ae0ea72e | 397 | { |
ae0ea72e SC |
398 | } |
399 | ||
5d2b030a SG |
400 | static struct serial_ops go32_ops = |
401 | { | |
402 | "hardwire", | |
403 | 0, | |
404 | go32_open, | |
405 | go32_close, | |
406 | go32_readchar, | |
407 | go32_write, | |
08c0d7b8 SC |
408 | go32_noop, /* flush output */ |
409 | go32_noop, /* flush input */ | |
410 | go32_noop, /* send break -- currently used only for nindy */ | |
5d2b030a | 411 | go32_raw, |
38dc5e12 SG |
412 | go32_get_tty_state, |
413 | go32_set_tty_state, | |
c2e247c4 JK |
414 | go32_print_tty_state, |
415 | go32_noflush_set_tty_state, | |
416 | go32_setbaudrate, | |
5d2b030a SG |
417 | }; |
418 | ||
976bb0be | 419 | void |
5d2b030a | 420 | _initialize_ser_go32 () |
ae0ea72e | 421 | { |
5d2b030a | 422 | serial_add_interface (&go32_ops); |
ae0ea72e | 423 | } |