Commit | Line | Data |
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55679787 SC |
1 | /* Remote serial interface using Hitachi E7000 PC ISA card in a PC |
2 | ||
3 | Copyright 1994 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
4ce7ba51 | 19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
16a43bf4 | 20 | |
4ce7ba51 SG |
21 | #if defined __GO32__ || defined _WIN32 |
22 | #include "defs.h" | |
23 | #include "serial.h" | |
24 | #include "gdb_string.h" | |
16a43bf4 | 25 | |
4ce7ba51 | 26 | /* MSVC uses strnicmp instead of strncasecmp */ |
16a43bf4 | 27 | #ifdef _MSC_VER |
5b59224e | 28 | #define strncasecmp strnicmp |
4ce7ba51 SG |
29 | #define WIN32_LEAN_AND_MEAN |
30 | #include <windows.h> | |
16a43bf4 | 31 | #endif |
16a43bf4 | 32 | |
4ce7ba51 | 33 | #ifdef __GO32__ |
5b59224e | 34 | #include <sys/dos.h> |
4ce7ba51 | 35 | #endif |
55679787 SC |
36 | |
37 | static int e7000pc_open PARAMS ((serial_t scb, const char *name)); | |
38 | static void e7000pc_raw PARAMS ((serial_t scb)); | |
39 | static int e7000pc_readchar PARAMS ((serial_t scb, int timeout)); | |
40 | static int e7000pc_setbaudrate PARAMS ((serial_t scb, int rate)); | |
41 | static int e7000pc_write PARAMS ((serial_t scb, const char *str, int len)); | |
42 | static void e7000pc_close PARAMS ((serial_t scb)); | |
43 | static serial_ttystate e7000pc_get_tty_state PARAMS ((serial_t scb)); | |
44 | static int e7000pc_set_tty_state PARAMS ((serial_t scb, serial_ttystate state)); | |
55679787 SC |
45 | |
46 | #define OFF_DPD 0x0000 | |
47 | #define OFF_DDP 0x1000 | |
48 | #define OFF_CPD 0x2000 | |
49 | #define OFF_CDP 0x2400 | |
50 | #define OFF_FA 0x3000 | |
51 | #define OFF_FB 0x3002 | |
52 | #define OFF_FC 0x3004 | |
53 | #define OFF_IRQTOD 0x3008 | |
54 | #define OFF_IRQTOP 0x300a | |
55 | #define OFF_READY 0x300c | |
56 | #define OFF_PON 0x300e | |
57 | ||
58 | #define IDLE 0x0000 | |
59 | #define CMD_CI 0x4349 | |
60 | #define CMD_CO 0x434f | |
61 | #define CMD_LO 0x4c4f | |
62 | #define CMD_LS 0x4c53 | |
63 | #define CMD_SV 0x5356 | |
64 | #define CMD_SS 0x5353 | |
65 | #define CMD_OK 0x4f4b | |
66 | #define CMD_ER 0x4552 | |
67 | #define CMD_NF 0x4e46 | |
68 | #define CMD_AB 0x4142 | |
69 | #define CMD_ED 0x4544 | |
70 | #define CMD_CE 0x4345 | |
71 | ||
72 | static unsigned long fa; | |
73 | static unsigned long irqtod; | |
74 | static unsigned long ready; | |
75 | static unsigned long fb; | |
76 | static unsigned long cpd ; | |
77 | static unsigned long cdp ; | |
78 | static unsigned long ready; | |
79 | static unsigned long pon; | |
80 | static unsigned long irqtop; | |
81 | static unsigned long board_at; | |
82 | ||
4ce7ba51 | 83 | #ifdef __GO32__ |
5b59224e | 84 | |
55679787 SC |
85 | #define SET_BYTE(x,y) { char _buf = y;dosmemput(&_buf,1, x);} |
86 | #define SET_WORD(x,y) { short _buf = y;dosmemput(&_buf,2, x);} | |
87 | #define GET_BYTE(x) ( dosmemget(x,1,&bb), bb) | |
88 | #define GET_WORD(x) ( dosmemget(x,2,&sb), sb) | |
55679787 SC |
89 | static unsigned char bb; |
90 | static unsigned short sb; | |
91 | ||
4ce7ba51 SG |
92 | #else /* win32 */ |
93 | ||
94 | #define SET_BYTE(x,y) *(volatile unsigned char *)(x) = (y) | |
95 | #define SET_WORD(x,y) *(volatile unsigned short *)(x) = (y) | |
96 | #define GET_BYTE(x) (*(volatile unsigned char *)(x)) | |
97 | #define GET_WORD(x) (*(volatile unsigned short *)(x)) | |
98 | #define dosmemget(FROM, LEN, TO) memcpy ((void *)(TO), (void *)(FROM), (LEN)) | |
99 | #define dosmemput(FROM, LEN, TO) memcpy ((void *)(TO), (void *)(FROM), (LEN)) | |
100 | #endif | |
55679787 SC |
101 | |
102 | static struct sw | |
103 | { | |
104 | int sw; | |
105 | int addr; | |
106 | } sigs[] = { | |
107 | {0x14, 0xd0000}, | |
108 | {0x15, 0xd4000}, | |
109 | {0x16, 0xd8000}, | |
110 | {0x17, 0xdc000}, | |
111 | 0}; | |
112 | ||
4ce7ba51 SG |
113 | #ifndef __GO32__ |
114 | /* Get the base of the data segment. This is needed to calculate the offset | |
115 | between data segment addresses and the base of linear memory, which is where | |
116 | device registers reside. Note that this is really only necessary for | |
117 | Win32s, since Win95 and NT keep the data segment at linear 0. */ | |
118 | ||
119 | static unsigned long | |
120 | get_ds_base (void) | |
121 | { | |
122 | unsigned short dsval; | |
123 | LDT_ENTRY ldt; | |
124 | unsigned long dsbase; | |
125 | ||
126 | __asm | |
127 | { | |
128 | mov dsval,ds | |
129 | } | |
130 | ||
131 | dsbase = 0; | |
132 | ||
133 | GetThreadSelectorEntry (GetCurrentThread(), dsval, &ldt); | |
134 | ||
135 | dsbase = ldt.HighWord.Bits.BaseHi << 24 | ldt.HighWord.Bits.BaseMid << 16 | |
136 | | ldt.BaseLow; | |
137 | ||
138 | return dsbase; | |
139 | } | |
140 | #else /* !__GO32__ */ | |
141 | #define get_ds_base() 0 | |
142 | #endif /* __GO32__ */ | |
143 | ||
55679787 SC |
144 | static int |
145 | e7000pc_init () | |
146 | { | |
55679787 | 147 | int try; |
4ce7ba51 | 148 | unsigned long dsbase; |
55679787 | 149 | |
4ce7ba51 | 150 | dsbase = get_ds_base (); |
55679787 | 151 | |
4ce7ba51 SG |
152 | /* Look around in memory for the board's signature */ |
153 | ||
154 | for (try = 0; sigs[try].sw; try++) | |
55679787 SC |
155 | { |
156 | int val; | |
4ce7ba51 | 157 | board_at = sigs[try].addr - dsbase; |
55679787 SC |
158 | fa = board_at + OFF_FA; |
159 | fb = board_at + OFF_FB; | |
160 | cpd = board_at + OFF_CPD; | |
161 | cdp = board_at + OFF_CDP; | |
162 | ready =board_at + OFF_READY; | |
163 | pon = board_at + OFF_PON; | |
164 | irqtop = board_at + OFF_IRQTOP; | |
165 | irqtod = board_at + OFF_IRQTOD; | |
4ce7ba51 | 166 | |
55679787 SC |
167 | val = GET_WORD (ready); |
168 | ||
169 | if (val == (0xaaa0 | sigs[try].sw)) | |
170 | { | |
4ce7ba51 | 171 | if (GET_WORD (pon) & 0xf) |
55679787 | 172 | { |
4ce7ba51 SG |
173 | SET_WORD (fa, 0); |
174 | SET_WORD (fb, 0); | |
55679787 | 175 | |
4ce7ba51 | 176 | SET_WORD (irqtop, 1); /* Disable interrupts from e7000 */ |
55679787 SC |
177 | SET_WORD (ready, 1); |
178 | printf_filtered ("\nConnected to the E7000PC at address 0x%x\n", | |
179 | sigs[try].addr); | |
180 | return 1; | |
181 | } | |
182 | error ("The E7000 PC board is working, but the E7000 is turned off.\n"); | |
183 | return 0; | |
184 | } | |
185 | } | |
186 | ||
187 | error ("GDB cannot connect to the E7000 PC board, check that it is installed\n\ | |
188 | and that the switch settings are correct. Some other DOS programs can \n\ | |
189 | stop the board from working. Try starting from a very minimal boot, \n\ | |
190 | perhaps you need to disable EMM386 over the region where the board has\n\ | |
191 | its I/O space, remove other unneeded cards, etc etc\n"); | |
192 | return 0; | |
193 | ||
194 | } | |
195 | ||
196 | static int pbuf_size; | |
197 | static int pbuf_index; | |
198 | ||
4ce7ba51 SG |
199 | /* Return next byte from cdp. If no more, then return -1. */ |
200 | ||
201 | static int | |
202 | e7000_get (void) | |
55679787 SC |
203 | { |
204 | static char pbuf[1000]; | |
205 | char tmp[1000]; | |
206 | int x; | |
4ce7ba51 | 207 | |
55679787 SC |
208 | if (pbuf_index < pbuf_size) |
209 | { | |
210 | x = pbuf[pbuf_index++]; | |
211 | } | |
4ce7ba51 | 212 | else if ((GET_WORD (fb) & 1)) |
55679787 SC |
213 | { |
214 | int i; | |
4ce7ba51 | 215 | pbuf_size = GET_WORD (cdp + 2); |
55679787 SC |
216 | |
217 | dosmemget (cdp + 8, pbuf_size + 1, tmp); | |
218 | ||
219 | /* Tell the E7000 we've eaten */ | |
4ce7ba51 | 220 | SET_WORD (fb, 0); |
55679787 SC |
221 | /* Swap it around */ |
222 | for (i = 0; i < pbuf_size; i++) | |
223 | { | |
224 | pbuf[i] = tmp[i^1]; | |
225 | } | |
226 | pbuf_index = 0; | |
227 | x = pbuf[pbuf_index++]; | |
228 | } | |
229 | else | |
230 | { | |
231 | x = -1; | |
232 | } | |
233 | return x; | |
234 | } | |
235 | ||
4ce7ba51 SG |
236 | /* Works just like read(), except that it takes a TIMEOUT in seconds. Note |
237 | that TIMEOUT == 0 is a poll, and TIMEOUT == -1 means wait forever. */ | |
238 | ||
55679787 SC |
239 | static int |
240 | dosasync_read (fd, buf, len, timeout) | |
241 | int fd; | |
242 | char *buf; | |
243 | int len; | |
244 | int timeout; | |
245 | ||
246 | { | |
247 | long now; | |
248 | long then; | |
249 | int i = 0; | |
55679787 SC |
250 | |
251 | /* Then look for some more if we're still hungry */ | |
252 | time (&now); | |
253 | then = now + timeout; | |
254 | while (i < len) | |
255 | { | |
256 | int ch = e7000_get(); | |
257 | ||
258 | /* While there's room in the buffer, and we've already | |
4ce7ba51 | 259 | read the stuff in, suck it over */ |
55679787 SC |
260 | if (ch != -1) |
261 | { | |
262 | buf[i++] = ch; | |
263 | while (i < len && pbuf_index < pbuf_size ) | |
264 | { | |
265 | ch = e7000_get(); | |
266 | if (ch == -1) | |
267 | break; | |
268 | buf[i++] = ch; | |
269 | } | |
270 | } | |
271 | ||
272 | time (&now); | |
273 | ||
4ce7ba51 SG |
274 | if (timeout == 0) |
275 | return i; | |
276 | if (now >= then && timeout > 0) | |
55679787 SC |
277 | { |
278 | return i; | |
279 | } | |
280 | } | |
281 | return len; | |
282 | } | |
283 | ||
284 | ||
285 | static int | |
286 | dosasync_write (fd, buf, len) | |
287 | int fd; | |
288 | const char *buf; | |
289 | int len; | |
290 | { | |
291 | int i; | |
292 | char dummy[1000]; | |
55679787 SC |
293 | |
294 | /* Construct copy locally */ | |
295 | ((short *)dummy)[0] = CMD_CI; | |
296 | ((short *)dummy)[1] = len; | |
297 | ((short *)dummy)[2] = 0; | |
298 | ((short *)dummy)[3] = 0; | |
299 | for (i = 0; i < len ; i++) | |
300 | { | |
301 | dummy[8 + i ^ 1] = buf[i]; | |
302 | } | |
303 | ||
304 | /* Wait for the card to get ready */ | |
4ce7ba51 | 305 | while (GET_WORD (fa) & 1) ; |
55679787 SC |
306 | |
307 | /* Blast onto the ISA card */ | |
308 | dosmemput (dummy, 8 + len + 1, cpd); | |
309 | ||
4ce7ba51 SG |
310 | SET_WORD (fa, 1); |
311 | SET_WORD (irqtod, 1); /* Interrupt the E7000 */ | |
55679787 SC |
312 | |
313 | return len; | |
314 | } | |
315 | ||
316 | static int | |
317 | e7000pc_open (scb, name) | |
318 | serial_t scb; | |
319 | const char *name; | |
320 | { | |
321 | if (strncasecmp (name, "pc", 2) != 0) | |
322 | { | |
323 | errno = ENOENT; | |
324 | return -1; | |
325 | } | |
4ce7ba51 | 326 | |
55679787 SC |
327 | scb->fd = e7000pc_init (); |
328 | ||
329 | if (!scb->fd) | |
330 | return -1; | |
331 | ||
332 | return 0; | |
333 | } | |
334 | ||
335 | static int | |
336 | e7000pc_noop (scb) | |
337 | serial_t scb; | |
338 | { | |
339 | return 0; | |
340 | } | |
341 | ||
342 | static void | |
343 | e7000pc_raw (scb) | |
344 | serial_t scb; | |
345 | { | |
346 | /* Always in raw mode */ | |
347 | } | |
348 | ||
349 | static int | |
350 | e7000pc_readchar (scb, timeout) | |
351 | serial_t scb; | |
352 | int timeout; | |
353 | { | |
354 | char buf; | |
355 | ||
356 | top: | |
357 | ||
358 | if (dosasync_read (scb->fd, &buf, 1, timeout)) | |
359 | { | |
360 | if (buf == 0) goto top; | |
361 | return buf; | |
362 | } | |
363 | else | |
364 | return SERIAL_TIMEOUT; | |
365 | } | |
366 | ||
367 | struct e7000pc_ttystate { | |
368 | int dummy; | |
369 | }; | |
370 | ||
371 | /* e7000pc_{get set}_tty_state() are both dummys to fill out the function | |
372 | vector. Someday, they may do something real... */ | |
373 | ||
374 | static serial_ttystate | |
375 | e7000pc_get_tty_state (scb) | |
376 | serial_t scb; | |
377 | { | |
378 | struct e7000pc_ttystate *state; | |
379 | ||
380 | state = (struct e7000pc_ttystate *) xmalloc (sizeof *state); | |
381 | ||
382 | return (serial_ttystate) state; | |
383 | } | |
384 | ||
385 | static int | |
386 | e7000pc_set_tty_state (scb, ttystate) | |
387 | serial_t scb; | |
388 | serial_ttystate ttystate; | |
389 | { | |
390 | return 0; | |
391 | } | |
392 | ||
393 | static int | |
394 | e7000pc_noflush_set_tty_state (scb, new_ttystate, old_ttystate) | |
395 | serial_t scb; | |
396 | serial_ttystate new_ttystate; | |
397 | serial_ttystate old_ttystate; | |
398 | { | |
399 | return 0; | |
400 | } | |
401 | ||
402 | static void | |
403 | e7000pc_print_tty_state (scb, ttystate) | |
404 | serial_t scb; | |
405 | serial_ttystate ttystate; | |
406 | { | |
407 | /* Nothing to print. */ | |
408 | return; | |
409 | } | |
410 | ||
411 | static int | |
412 | e7000pc_setbaudrate (scb, rate) | |
413 | serial_t scb; | |
414 | int rate; | |
415 | { | |
416 | return 0; | |
417 | } | |
418 | ||
419 | static int | |
420 | e7000pc_write (scb, str, len) | |
421 | serial_t scb; | |
422 | const char *str; | |
423 | int len; | |
424 | { | |
425 | dosasync_write (scb->fd, str, len); | |
426 | ||
427 | return 0; | |
428 | } | |
429 | ||
430 | static void | |
431 | e7000pc_close (scb) | |
432 | serial_t scb; | |
433 | { | |
434 | } | |
435 | ||
436 | static struct serial_ops e7000pc_ops = | |
437 | { | |
438 | "pc", | |
439 | 0, | |
440 | e7000pc_open, | |
441 | e7000pc_close, | |
442 | e7000pc_readchar, | |
443 | e7000pc_write, | |
444 | e7000pc_noop, /* flush output */ | |
445 | e7000pc_noop, /* flush input */ | |
446 | e7000pc_noop, /* send break -- currently used only for nindy */ | |
447 | e7000pc_raw, | |
448 | e7000pc_get_tty_state, | |
449 | e7000pc_set_tty_state, | |
450 | e7000pc_print_tty_state, | |
451 | e7000pc_noflush_set_tty_state, | |
452 | e7000pc_setbaudrate, | |
453 | }; | |
454 | ||
455 | void | |
456 | _initialize_ser_e7000pc () | |
457 | { | |
458 | serial_add_interface (&e7000pc_ops); | |
459 | } | |
460 | #else | |
461 | ||
462 | void | |
463 | _initialize_ser_e7000pc () | |
464 | { | |
465 | ||
466 | } | |
4ce7ba51 | 467 | #endif |