| 1 | /* Remote serial interface using Hitachi E7000 PC ISA card in a PC |
| 2 | Copyright 1994, 1999, 2000 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GDB. |
| 5 | |
| 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. |
| 10 | |
| 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. |
| 15 | |
| 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., 59 Temple Place - Suite 330, |
| 19 | Boston, MA 02111-1307, USA. */ |
| 20 | |
| 21 | #if defined __GO32__ || defined _WIN32 |
| 22 | #include "defs.h" |
| 23 | #include "serial.h" |
| 24 | #include "gdb_string.h" |
| 25 | |
| 26 | /* MSVC uses strnicmp instead of strncasecmp */ |
| 27 | #ifdef _MSC_VER |
| 28 | #define strncasecmp strnicmp |
| 29 | #define WIN32_LEAN_AND_MEAN |
| 30 | #endif |
| 31 | |
| 32 | #ifdef _WIN32 |
| 33 | #include <windows.h> |
| 34 | #endif |
| 35 | |
| 36 | #ifdef __GO32__ |
| 37 | #include <sys/dos.h> |
| 38 | #endif |
| 39 | |
| 40 | static int e7000pc_open (serial_t scb, const char *name); |
| 41 | static void e7000pc_raw (serial_t scb); |
| 42 | static int e7000pc_readchar (serial_t scb, int timeout); |
| 43 | static int e7000pc_setbaudrate (serial_t scb, int rate); |
| 44 | static int e7000pc_write (serial_t scb, const char *str, int len); |
| 45 | static void e7000pc_close (serial_t scb); |
| 46 | static serial_ttystate e7000pc_get_tty_state (serial_t scb); |
| 47 | static int e7000pc_set_tty_state (serial_t scb, serial_ttystate state); |
| 48 | |
| 49 | #define OFF_DPD 0x0000 |
| 50 | #define OFF_DDP 0x1000 |
| 51 | #define OFF_CPD 0x2000 |
| 52 | #define OFF_CDP 0x2400 |
| 53 | #define OFF_FA 0x3000 |
| 54 | #define OFF_FB 0x3002 |
| 55 | #define OFF_FC 0x3004 |
| 56 | #define OFF_IRQTOD 0x3008 |
| 57 | #define OFF_IRQTOP 0x300a |
| 58 | #define OFF_READY 0x300c |
| 59 | #define OFF_PON 0x300e |
| 60 | |
| 61 | #define IDLE 0x0000 |
| 62 | #define CMD_CI 0x4349 |
| 63 | #define CMD_CO 0x434f |
| 64 | #define CMD_LO 0x4c4f |
| 65 | #define CMD_LS 0x4c53 |
| 66 | #define CMD_SV 0x5356 |
| 67 | #define CMD_SS 0x5353 |
| 68 | #define CMD_OK 0x4f4b |
| 69 | #define CMD_ER 0x4552 |
| 70 | #define CMD_NF 0x4e46 |
| 71 | #define CMD_AB 0x4142 |
| 72 | #define CMD_ED 0x4544 |
| 73 | #define CMD_CE 0x4345 |
| 74 | |
| 75 | static unsigned long fa; |
| 76 | static unsigned long irqtod; |
| 77 | static unsigned long ready; |
| 78 | static unsigned long fb; |
| 79 | static unsigned long cpd; |
| 80 | static unsigned long cdp; |
| 81 | static unsigned long ready; |
| 82 | static unsigned long pon; |
| 83 | static unsigned long irqtop; |
| 84 | static unsigned long board_at; |
| 85 | |
| 86 | #ifdef __GO32__ |
| 87 | |
| 88 | #define SET_BYTE(x,y) { char _buf = y;dosmemput(&_buf,1, x);} |
| 89 | #define SET_WORD(x,y) { short _buf = y;dosmemput(&_buf,2, x);} |
| 90 | #define GET_BYTE(x) ( dosmemget(x,1,&bb), bb) |
| 91 | #define GET_WORD(x) ( dosmemget(x,2,&sb), sb) |
| 92 | static unsigned char bb; |
| 93 | static unsigned short sb; |
| 94 | |
| 95 | #else /* win32 */ |
| 96 | |
| 97 | #define SET_BYTE(x,y) *(volatile unsigned char *)(x) = (y) |
| 98 | #define SET_WORD(x,y) *(volatile unsigned short *)(x) = (y) |
| 99 | #define GET_BYTE(x) (*(volatile unsigned char *)(x)) |
| 100 | #define GET_WORD(x) (*(volatile unsigned short *)(x)) |
| 101 | #define dosmemget(FROM, LEN, TO) memcpy ((void *)(TO), (void *)(FROM), (LEN)) |
| 102 | #define dosmemput(FROM, LEN, TO) memcpy ((void *)(TO), (void *)(FROM), (LEN)) |
| 103 | #endif |
| 104 | |
| 105 | static struct sw |
| 106 | { |
| 107 | int sw; |
| 108 | int addr; |
| 109 | } |
| 110 | sigs[] = |
| 111 | { |
| 112 | { |
| 113 | 0x14, 0xd0000 |
| 114 | } |
| 115 | , |
| 116 | { |
| 117 | 0x15, 0xd4000 |
| 118 | } |
| 119 | , |
| 120 | { |
| 121 | 0x16, 0xd8000 |
| 122 | } |
| 123 | , |
| 124 | { |
| 125 | 0x17, 0xdc000 |
| 126 | } |
| 127 | , |
| 128 | 0 |
| 129 | }; |
| 130 | |
| 131 | #ifdef _MSC_VER |
| 132 | /* Get the base of the data segment. This is needed to calculate the offset |
| 133 | between data segment addresses and the base of linear memory, which is where |
| 134 | device registers reside. Note that this is really only necessary for |
| 135 | Win32s, since Win95 and NT keep the data segment at linear 0. */ |
| 136 | |
| 137 | static unsigned long |
| 138 | get_ds_base (void) |
| 139 | { |
| 140 | unsigned short dsval; |
| 141 | LDT_ENTRY ldt; |
| 142 | unsigned long dsbase; |
| 143 | |
| 144 | __asm |
| 145 | { |
| 146 | mov dsval, ds |
| 147 | } |
| 148 | |
| 149 | dsbase = 0; |
| 150 | |
| 151 | GetThreadSelectorEntry (GetCurrentThread (), dsval, &ldt); |
| 152 | |
| 153 | dsbase = ldt.HighWord.Bits.BaseHi << 24 | ldt.HighWord.Bits.BaseMid << 16 |
| 154 | | ldt.BaseLow; |
| 155 | |
| 156 | return dsbase; |
| 157 | } |
| 158 | #else /* !_MSC_VER */ |
| 159 | #define get_ds_base() 0 |
| 160 | #endif /* _MSC_VER */ |
| 161 | |
| 162 | static int |
| 163 | e7000pc_init (void) |
| 164 | { |
| 165 | int try; |
| 166 | unsigned long dsbase; |
| 167 | |
| 168 | dsbase = get_ds_base (); |
| 169 | |
| 170 | /* Look around in memory for the board's signature */ |
| 171 | |
| 172 | for (try = 0; sigs[try].sw; try++) |
| 173 | { |
| 174 | int val; |
| 175 | board_at = sigs[try].addr - dsbase; |
| 176 | fa = board_at + OFF_FA; |
| 177 | fb = board_at + OFF_FB; |
| 178 | cpd = board_at + OFF_CPD; |
| 179 | cdp = board_at + OFF_CDP; |
| 180 | ready = board_at + OFF_READY; |
| 181 | pon = board_at + OFF_PON; |
| 182 | irqtop = board_at + OFF_IRQTOP; |
| 183 | irqtod = board_at + OFF_IRQTOD; |
| 184 | |
| 185 | val = GET_WORD (ready); |
| 186 | |
| 187 | if (val == (0xaaa0 | sigs[try].sw)) |
| 188 | { |
| 189 | if (GET_WORD (pon) & 0xf) |
| 190 | { |
| 191 | SET_WORD (fa, 0); |
| 192 | SET_WORD (fb, 0); |
| 193 | |
| 194 | SET_WORD (irqtop, 1); /* Disable interrupts from e7000 */ |
| 195 | SET_WORD (ready, 1); |
| 196 | printf_filtered ("\nConnected to the E7000PC at address 0x%x\n", |
| 197 | sigs[try].addr); |
| 198 | return 1; |
| 199 | } |
| 200 | error ("The E7000 PC board is working, but the E7000 is turned off.\n"); |
| 201 | return 0; |
| 202 | } |
| 203 | } |
| 204 | |
| 205 | error ("GDB cannot connect to the E7000 PC board, check that it is installed\n\ |
| 206 | and that the switch settings are correct. Some other DOS programs can \n\ |
| 207 | stop the board from working. Try starting from a very minimal boot, \n\ |
| 208 | perhaps you need to disable EMM386 over the region where the board has\n\ |
| 209 | its I/O space, remove other unneeded cards, etc etc\n"); |
| 210 | return 0; |
| 211 | |
| 212 | } |
| 213 | |
| 214 | static int pbuf_size; |
| 215 | static int pbuf_index; |
| 216 | |
| 217 | /* Return next byte from cdp. If no more, then return -1. */ |
| 218 | |
| 219 | static int |
| 220 | e7000_get (void) |
| 221 | { |
| 222 | static char pbuf[1000]; |
| 223 | char tmp[1000]; |
| 224 | int x; |
| 225 | |
| 226 | if (pbuf_index < pbuf_size) |
| 227 | { |
| 228 | x = pbuf[pbuf_index++]; |
| 229 | } |
| 230 | else if ((GET_WORD (fb) & 1)) |
| 231 | { |
| 232 | int i; |
| 233 | pbuf_size = GET_WORD (cdp + 2); |
| 234 | |
| 235 | dosmemget (cdp + 8, pbuf_size + 1, tmp); |
| 236 | |
| 237 | /* Tell the E7000 we've eaten */ |
| 238 | SET_WORD (fb, 0); |
| 239 | /* Swap it around */ |
| 240 | for (i = 0; i < pbuf_size; i++) |
| 241 | { |
| 242 | pbuf[i] = tmp[i ^ 1]; |
| 243 | } |
| 244 | pbuf_index = 0; |
| 245 | x = pbuf[pbuf_index++]; |
| 246 | } |
| 247 | else |
| 248 | { |
| 249 | x = -1; |
| 250 | } |
| 251 | return x; |
| 252 | } |
| 253 | |
| 254 | /* Works just like read(), except that it takes a TIMEOUT in seconds. Note |
| 255 | that TIMEOUT == 0 is a poll, and TIMEOUT == -1 means wait forever. */ |
| 256 | |
| 257 | static int |
| 258 | dosasync_read (int fd, char *buf, int len, int timeout) |
| 259 | { |
| 260 | long now; |
| 261 | long then; |
| 262 | int i = 0; |
| 263 | |
| 264 | /* Then look for some more if we're still hungry */ |
| 265 | time (&now); |
| 266 | then = now + timeout; |
| 267 | while (i < len) |
| 268 | { |
| 269 | int ch = e7000_get (); |
| 270 | |
| 271 | /* While there's room in the buffer, and we've already |
| 272 | read the stuff in, suck it over */ |
| 273 | if (ch != -1) |
| 274 | { |
| 275 | buf[i++] = ch; |
| 276 | while (i < len && pbuf_index < pbuf_size) |
| 277 | { |
| 278 | ch = e7000_get (); |
| 279 | if (ch == -1) |
| 280 | break; |
| 281 | buf[i++] = ch; |
| 282 | } |
| 283 | } |
| 284 | |
| 285 | time (&now); |
| 286 | |
| 287 | if (timeout == 0) |
| 288 | return i; |
| 289 | if (now >= then && timeout > 0) |
| 290 | { |
| 291 | return i; |
| 292 | } |
| 293 | } |
| 294 | return len; |
| 295 | } |
| 296 | |
| 297 | |
| 298 | static int |
| 299 | dosasync_write (int fd, const char *buf, int len) |
| 300 | { |
| 301 | int i; |
| 302 | char dummy[1000]; |
| 303 | |
| 304 | /* Construct copy locally */ |
| 305 | ((short *) dummy)[0] = CMD_CI; |
| 306 | ((short *) dummy)[1] = len; |
| 307 | ((short *) dummy)[2] = 0; |
| 308 | ((short *) dummy)[3] = 0; |
| 309 | for (i = 0; i < len; i++) |
| 310 | { |
| 311 | dummy[(8 + i) ^ 1] = buf[i]; |
| 312 | } |
| 313 | |
| 314 | /* Wait for the card to get ready */ |
| 315 | while (GET_WORD (fa) & 1); |
| 316 | |
| 317 | /* Blast onto the ISA card */ |
| 318 | dosmemput (dummy, 8 + len + 1, cpd); |
| 319 | |
| 320 | SET_WORD (fa, 1); |
| 321 | SET_WORD (irqtod, 1); /* Interrupt the E7000 */ |
| 322 | |
| 323 | return len; |
| 324 | } |
| 325 | |
| 326 | static int |
| 327 | e7000pc_open (serial_t scb, const char *name) |
| 328 | { |
| 329 | if (strncasecmp (name, "pc", 2) != 0) |
| 330 | { |
| 331 | errno = ENOENT; |
| 332 | return -1; |
| 333 | } |
| 334 | |
| 335 | scb->fd = e7000pc_init (); |
| 336 | |
| 337 | if (!scb->fd) |
| 338 | return -1; |
| 339 | |
| 340 | return 0; |
| 341 | } |
| 342 | |
| 343 | static int |
| 344 | e7000pc_noop (serial_t scb) |
| 345 | { |
| 346 | return 0; |
| 347 | } |
| 348 | |
| 349 | static void |
| 350 | e7000pc_raw (serial_t scb) |
| 351 | { |
| 352 | /* Always in raw mode */ |
| 353 | } |
| 354 | |
| 355 | static int |
| 356 | e7000pc_readchar (serial_t scb, int timeout) |
| 357 | { |
| 358 | char buf; |
| 359 | |
| 360 | top: |
| 361 | |
| 362 | if (dosasync_read (scb->fd, &buf, 1, timeout)) |
| 363 | { |
| 364 | if (buf == 0) |
| 365 | goto top; |
| 366 | return buf; |
| 367 | } |
| 368 | else |
| 369 | return SERIAL_TIMEOUT; |
| 370 | } |
| 371 | |
| 372 | struct e7000pc_ttystate |
| 373 | { |
| 374 | int dummy; |
| 375 | }; |
| 376 | |
| 377 | /* e7000pc_{get set}_tty_state() are both dummys to fill out the function |
| 378 | vector. Someday, they may do something real... */ |
| 379 | |
| 380 | static serial_ttystate |
| 381 | e7000pc_get_tty_state (serial_t scb) |
| 382 | { |
| 383 | struct e7000pc_ttystate *state; |
| 384 | |
| 385 | state = (struct e7000pc_ttystate *) xmalloc (sizeof *state); |
| 386 | |
| 387 | return (serial_ttystate) state; |
| 388 | } |
| 389 | |
| 390 | static int |
| 391 | e7000pc_set_tty_state (serial_t scb, serial_ttystate ttystate) |
| 392 | { |
| 393 | return 0; |
| 394 | } |
| 395 | |
| 396 | static int |
| 397 | e7000pc_noflush_set_tty_state (serial_t scb, serial_ttystate new_ttystate, |
| 398 | serial_ttystate old_ttystate) |
| 399 | { |
| 400 | return 0; |
| 401 | } |
| 402 | |
| 403 | static void |
| 404 | e7000pc_print_tty_state (serial_t scb, |
| 405 | serial_ttystate ttystate, |
| 406 | struct ui_file *stream) |
| 407 | { |
| 408 | /* Nothing to print. */ |
| 409 | return; |
| 410 | } |
| 411 | |
| 412 | static int |
| 413 | e7000pc_setbaudrate (serial_t scb, int rate) |
| 414 | { |
| 415 | return 0; |
| 416 | } |
| 417 | |
| 418 | static int |
| 419 | e7000pc_setstopbits (serial_t scb, int rate) |
| 420 | { |
| 421 | return 0; |
| 422 | } |
| 423 | |
| 424 | static int |
| 425 | e7000pc_write (serial_t scb, const char *str, int len) |
| 426 | { |
| 427 | dosasync_write (scb->fd, str, len); |
| 428 | |
| 429 | return 0; |
| 430 | } |
| 431 | |
| 432 | static void |
| 433 | e7000pc_close (serial_t scb) |
| 434 | { |
| 435 | } |
| 436 | |
| 437 | static struct serial_ops e7000pc_ops = |
| 438 | { |
| 439 | "pc", |
| 440 | 0, |
| 441 | e7000pc_open, |
| 442 | e7000pc_close, |
| 443 | e7000pc_readchar, |
| 444 | e7000pc_write, |
| 445 | e7000pc_noop, /* flush output */ |
| 446 | e7000pc_noop, /* flush input */ |
| 447 | e7000pc_noop, /* send break -- currently used only for nindy */ |
| 448 | e7000pc_raw, |
| 449 | e7000pc_get_tty_state, |
| 450 | e7000pc_set_tty_state, |
| 451 | e7000pc_print_tty_state, |
| 452 | e7000pc_noflush_set_tty_state, |
| 453 | e7000pc_setbaudrate, |
| 454 | e7000pc_setstopbits, |
| 455 | e7000pc_noop, /* wait for output to drain */ |
| 456 | }; |
| 457 | |
| 458 | void |
| 459 | _initialize_ser_e7000pc (void) |
| 460 | { |
| 461 | serial_add_interface (&e7000pc_ops); |
| 462 | } |
| 463 | #else |
| 464 | |
| 465 | void |
| 466 | _initialize_ser_e7000pc (void) |
| 467 | { |
| 468 | |
| 469 | } |
| 470 | #endif |