source: mainline/uspace/srv/console/console.c@ e00938c

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since e00938c was 215e375, checked in by Jakub Jermar <jakub@…>, 18 years ago

The IPC_M_SHARE_* and IPC_M_DATA_* calls pass through 3 stages. Rename the send,
receive and deliver wrappers to names ending with 'start', 'receive' and
'finalize', respectively. This should make it clearer for dummies.
  • Property mode set to 100644
File size: 13.7 KB
Line 
1/*
2 * Copyright (c) 2006 Josef Cejka
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/** @addtogroup console
30 * @{
31 */
32/** @file
33 */
34
35#include <libc.h>
36#include <fb.h>
37#include <ipc/ipc.h>
38#include <keys.h>
39#include <ipc/fb.h>
40#include <ipc/services.h>
41#include <errno.h>
42#include <key_buffer.h>
43#include <console.h>
44#include <unistd.h>
45#include <async.h>
46#include <libadt/fifo.h>
47#include <screenbuffer.h>
48#include <sys/mman.h>
49
50#include "gcons.h"
51
52#define MAX_KEYREQUESTS_BUFFERED 32
53
54#define NAME "CONSOLE"
55
56/** Index of currently used virtual console.
57 */
58int active_console = 0;
59
60/** Information about framebuffer
61 */
62struct {
63 int phone; /**< Framebuffer phone */
64 ipcarg_t rows; /**< Framebuffer rows */
65 ipcarg_t cols; /**< Framebuffer columns */
66} fb_info;
67
68typedef struct {
69 keybuffer_t keybuffer; /**< Buffer for incoming keys. */
70 /** Buffer for unsatisfied request for keys. */
71 FIFO_CREATE_STATIC(keyrequests, ipc_callid_t,
72 MAX_KEYREQUESTS_BUFFERED);
73 int keyrequest_counter; /**< Number of requests in buffer. */
74 int client_phone; /**< Phone to connected client. */
75 int used; /**< 1 if this virtual console is
76 * connected to some client.*/
77 screenbuffer_t screenbuffer; /**< Screenbuffer for saving screen
78 * contents and related settings. */
79} connection_t;
80
81static connection_t connections[CONSOLE_COUNT]; /**< Array of data for virtual
82 * consoles */
83static keyfield_t *interbuffer = NULL; /**< Pointer to memory shared
84 * with framebufer used for
85 * faster virtual console
86 * switching */
87
88static int kernel_pixmap = -1; /**< Number of fb pixmap, where kernel
89 * console is stored */
90
91
92/** Find unused virtual console.
93 *
94 */
95static int find_free_connection(void)
96{
97 int i;
98
99 for (i = 0; i < CONSOLE_COUNT; i++) {
100 if (!connections[i].used)
101 return i;
102 }
103 return -1;
104}
105
106static void clrscr(void)
107{
108 async_msg_0(fb_info.phone, FB_CLEAR);
109}
110
111static void curs_visibility(int v)
112{
113 async_msg_1(fb_info.phone, FB_CURSOR_VISIBILITY, v);
114}
115
116static void curs_goto(int row, int col)
117{
118 async_msg_2(fb_info.phone, FB_CURSOR_GOTO, row, col);
119}
120
121static void set_style(style_t *style)
122{
123 async_msg_2(fb_info.phone, FB_SET_STYLE, style->fg_color,
124 style->bg_color);
125}
126
127static void set_style_col(int fgcolor, int bgcolor)
128{
129 async_msg_2(fb_info.phone, FB_SET_STYLE, fgcolor, bgcolor);
130}
131
132static void prtchr(char c, int row, int col)
133{
134 async_msg_3(fb_info.phone, FB_PUTCHAR, c, row, col);
135}
136
137/** Check key and process special keys.
138 *
139 *
140 */
141static void write_char(int console, char key)
142{
143 screenbuffer_t *scr = &(connections[console].screenbuffer);
144
145 switch (key) {
146 case '\n':
147 scr->position_y++;
148 scr->position_x = 0;
149 break;
150 case '\r':
151 break;
152 case '\t':
153 scr->position_x += 8;
154 scr->position_x -= scr->position_x % 8;
155 break;
156 case '\b':
157 if (scr->position_x == 0)
158 break;
159 scr->position_x--;
160 if (console == active_console)
161 prtchr(' ', scr->position_y, scr->position_x);
162 screenbuffer_putchar(scr, ' ');
163 break;
164 default:
165 if (console == active_console)
166 prtchr(key, scr->position_y, scr->position_x);
167
168 screenbuffer_putchar(scr, key);
169 scr->position_x++;
170 }
171
172 scr->position_y += (scr->position_x >= scr->size_x);
173
174 if (scr->position_y >= scr->size_y) {
175 scr->position_y = scr->size_y - 1;
176 screenbuffer_clear_line(scr, scr->top_line);
177 scr->top_line = (scr->top_line + 1) % scr->size_y;
178 if (console == active_console)
179 async_msg_1(fb_info.phone, FB_SCROLL, 1);
180 }
181
182 scr->position_x = scr->position_x % scr->size_x;
183
184 if (console == active_console)
185 curs_goto(scr->position_y, scr->position_x);
186
187}
188
189/** Save current screen to pixmap, draw old pixmap
190 *
191 * @param oldpixmap Old pixmap
192 * @return ID of pixmap of current screen
193 */
194static int switch_screens(int oldpixmap)
195{
196 int newpmap;
197
198 /* Save screen */
199 newpmap = async_req_0_0(fb_info.phone, FB_VP2PIXMAP);
200 if (newpmap < 0)
201 return -1;
202
203 if (oldpixmap != -1) {
204 /* Show old screen */
205 async_msg_2(fb_info.phone, FB_VP_DRAW_PIXMAP, 0, oldpixmap);
206 /* Drop old pixmap */
207 async_msg_1(fb_info.phone, FB_DROP_PIXMAP, oldpixmap);
208 }
209
210 return newpmap;
211}
212
213/** Switch to new console */
214static void change_console(int newcons)
215{
216 connection_t *conn;
217 static int console_pixmap = -1;
218 int i, j, rc;
219 keyfield_t *field;
220 style_t *style;
221
222 if (newcons == active_console)
223 return;
224
225 if (newcons == KERNEL_CONSOLE) {
226 if (active_console == KERNEL_CONSOLE)
227 return;
228 active_console = KERNEL_CONSOLE;
229 curs_visibility(0);
230
231 async_serialize_start();
232 if (kernel_pixmap == -1) {
233 /* store/restore unsupported */
234 set_style_col(DEFAULT_FOREGROUND, DEFAULT_BACKGROUND);
235 clrscr();
236 } else {
237 gcons_in_kernel();
238 console_pixmap = switch_screens(kernel_pixmap);
239 kernel_pixmap = -1;
240 }
241 async_serialize_end();
242
243 __SYSCALL0(SYS_DEBUG_ENABLE_CONSOLE);
244 return;
245 }
246
247 async_serialize_start();
248
249 if (console_pixmap != -1) {
250 kernel_pixmap = switch_screens(console_pixmap);
251 console_pixmap = -1;
252 }
253 active_console = newcons;
254 gcons_change_console(newcons);
255 conn = &connections[active_console];
256
257 set_style(&conn->screenbuffer.style);
258 curs_visibility(0);
259 if (interbuffer) {
260 for (i = 0; i < conn->screenbuffer.size_x; i++)
261 for (j = 0; j < conn->screenbuffer.size_y; j++) {
262 unsigned int size_x;
263
264 size_x = conn->screenbuffer.size_x;
265 interbuffer[i + j * size_x] =
266 *get_field_at(&conn->screenbuffer, i, j);
267 }
268 /* This call can preempt, but we are already at the end */
269 rc = async_req_0_0(fb_info.phone, FB_DRAW_TEXT_DATA);
270 }
271
272 if ((!interbuffer) || (rc != 0)) {
273 set_style(&conn->screenbuffer.style);
274 clrscr();
275 style = &conn->screenbuffer.style;
276
277 for (j = 0; j < conn->screenbuffer.size_y; j++)
278 for (i = 0; i < conn->screenbuffer.size_x; i++) {
279 field = get_field_at(&conn->screenbuffer, i, j);
280 if (!style_same(*style, field->style))
281 set_style(&field->style);
282 style = &field->style;
283 if ((field->character == ' ') &&
284 (style_same(field->style,
285 conn->screenbuffer.style)))
286 continue;
287
288 prtchr(field->character, j, i);
289 }
290 }
291
292 curs_goto(conn->screenbuffer.position_y,
293 conn->screenbuffer.position_x);
294 curs_visibility(conn->screenbuffer.is_cursor_visible);
295
296 async_serialize_end();
297}
298
299/** Handler for keyboard */
300static void keyboard_events(ipc_callid_t iid, ipc_call_t *icall)
301{
302 ipc_callid_t callid;
303 ipc_call_t call;
304 int retval;
305 int c;
306 connection_t *conn;
307 int newcon;
308
309 /* Ignore parameters, the connection is alread opened */
310 while (1) {
311 callid = async_get_call(&call);
312 switch (IPC_GET_METHOD(call)) {
313 case IPC_M_PHONE_HUNGUP:
314 /* TODO: Handle hangup */
315 return;
316 case KBD_MS_LEFT:
317 newcon = gcons_mouse_btn(IPC_GET_ARG1(call));
318 if (newcon != -1)
319 change_console(newcon);
320 retval = 0;
321 break;
322 case KBD_MS_MOVE:
323 gcons_mouse_move(IPC_GET_ARG1(call),
324 IPC_GET_ARG2(call));
325 retval = 0;
326 break;
327 case KBD_PUSHCHAR:
328 /* got key from keyboard driver */
329
330 retval = 0;
331 c = IPC_GET_ARG1(call);
332 /* switch to another virtual console */
333
334 conn = &connections[active_console];
335/*
336 * if ((c >= KBD_KEY_F1) && (c < KBD_KEY_F1 +
337 * CONSOLE_COUNT)) {
338 */
339 if ((c >= 0x101) && (c < 0x101 + CONSOLE_COUNT)) {
340 if (c == 0x112)
341 change_console(KERNEL_CONSOLE);
342 else
343 change_console(c - 0x101);
344 break;
345 }
346
347 /* if client is awaiting key, send it */
348 if (conn->keyrequest_counter > 0) {
349 conn->keyrequest_counter--;
350 ipc_answer_1(fifo_pop(conn->keyrequests), EOK,
351 c);
352 break;
353 }
354
355 keybuffer_push(&conn->keybuffer, c);
356 retval = 0;
357
358 break;
359 default:
360 retval = ENOENT;
361 }
362 ipc_answer_0(callid, retval);
363 }
364}
365
366/** Default thread for new connections */
367static void client_connection(ipc_callid_t iid, ipc_call_t *icall)
368{
369 ipc_callid_t callid;
370 ipc_call_t call;
371 int consnum;
372 ipcarg_t arg1, arg2;
373 connection_t *conn;
374
375 if ((consnum = find_free_connection()) == -1) {
376 ipc_answer_0(iid, ELIMIT);
377 return;
378 }
379 conn = &connections[consnum];
380 conn->used = 1;
381
382 async_serialize_start();
383 gcons_notify_connect(consnum);
384 conn->client_phone = IPC_GET_ARG5(*icall);
385 screenbuffer_clear(&conn->screenbuffer);
386
387 /* Accept the connection */
388 ipc_answer_0(iid, EOK);
389
390 while (1) {
391 async_serialize_end();
392 callid = async_get_call(&call);
393 async_serialize_start();
394
395 arg1 = 0;
396 arg2 = 0;
397 switch (IPC_GET_METHOD(call)) {
398 case IPC_M_PHONE_HUNGUP:
399 gcons_notify_disconnect(consnum);
400
401 /* Answer all pending requests */
402 while (conn->keyrequest_counter > 0) {
403 conn->keyrequest_counter--;
404 ipc_answer_0(fifo_pop(conn->keyrequests),
405 ENOENT);
406 break;
407 }
408 conn->used = 0;
409 return;
410 case CONSOLE_PUTCHAR:
411 write_char(consnum, IPC_GET_ARG1(call));
412 gcons_notify_char(consnum);
413 break;
414 case CONSOLE_CLEAR:
415 /* Send message to fb */
416 if (consnum == active_console) {
417 async_msg_0(fb_info.phone, FB_CLEAR);
418 }
419
420 screenbuffer_clear(&conn->screenbuffer);
421
422 break;
423 case CONSOLE_GOTO:
424 screenbuffer_goto(&conn->screenbuffer,
425 IPC_GET_ARG2(call), IPC_GET_ARG1(call));
426 if (consnum == active_console)
427 curs_goto(IPC_GET_ARG1(call),
428 IPC_GET_ARG2(call));
429 break;
430 case CONSOLE_GETSIZE:
431 arg1 = fb_info.rows;
432 arg2 = fb_info.cols;
433 break;
434 case CONSOLE_FLUSH:
435 if (consnum == active_console)
436 async_req_0_0(fb_info.phone, FB_FLUSH);
437 break;
438 case CONSOLE_SET_STYLE:
439 arg1 = IPC_GET_ARG1(call);
440 arg2 = IPC_GET_ARG2(call);
441 screenbuffer_set_style(&conn->screenbuffer, arg1,
442 arg2);
443 if (consnum == active_console)
444 set_style_col(arg1, arg2);
445 break;
446 case CONSOLE_CURSOR_VISIBILITY:
447 arg1 = IPC_GET_ARG1(call);
448 conn->screenbuffer.is_cursor_visible = arg1;
449 if (consnum == active_console)
450 curs_visibility(arg1);
451 break;
452 case CONSOLE_GETCHAR:
453 if (keybuffer_empty(&conn->keybuffer)) {
454 /* buffer is empty -> store request */
455 if (conn->keyrequest_counter <
456 MAX_KEYREQUESTS_BUFFERED) {
457 fifo_push(conn->keyrequests, callid);
458 conn->keyrequest_counter++;
459 } else {
460 /*
461 * No key available and too many
462 * requests => fail.
463 */
464 ipc_answer_0(callid, ELIMIT);
465 }
466 continue;
467 }
468 keybuffer_pop(&conn->keybuffer, (int *) &arg1);
469 break;
470 }
471 ipc_answer_2(callid, EOK, arg1, arg2);
472 }
473}
474
475int main(int argc, char *argv[])
476{
477 ipcarg_t phonehash;
478 int kbd_phone;
479 int i;
480
481 async_set_client_connection(client_connection);
482
483 /* Connect to keyboard driver */
484
485 kbd_phone = ipc_connect_me_to(PHONE_NS, SERVICE_KEYBOARD, 0, 0);
486 while (kbd_phone < 0) {
487 usleep(10000);
488 kbd_phone = ipc_connect_me_to(PHONE_NS, SERVICE_KEYBOARD, 0, 0);
489 }
490
491 if (ipc_connect_to_me(kbd_phone, SERVICE_CONSOLE, 0, 0, &phonehash) != 0)
492 return -1;
493 async_new_connection(phonehash, 0, NULL, keyboard_events);
494
495 /* Connect to framebuffer driver */
496
497 fb_info.phone = ipc_connect_me_to(PHONE_NS, SERVICE_VIDEO, 0, 0);
498 while (fb_info.phone < 0) {
499 usleep(10000);
500 fb_info.phone = ipc_connect_me_to(PHONE_NS, SERVICE_VIDEO, 0, 0);
501 }
502
503 /* Save old kernel screen */
504 kernel_pixmap = switch_screens(-1);
505
506 /* Initialize gcons */
507 gcons_init(fb_info.phone);
508 /* Synchronize, the gcons can have something in queue */
509 async_req_0_0(fb_info.phone, FB_FLUSH);
510 /* Enable double buffering */
511 async_msg_2(fb_info.phone, FB_VIEWPORT_DB, (sysarg_t) -1, 1);
512
513 async_req_0_2(fb_info.phone, FB_GET_CSIZE, &fb_info.rows,
514 &fb_info.cols);
515 set_style_col(DEFAULT_FOREGROUND, DEFAULT_BACKGROUND);
516 clrscr();
517
518 /* Init virtual consoles */
519 for (i = 0; i < CONSOLE_COUNT; i++) {
520 connections[i].used = 0;
521 keybuffer_init(&connections[i].keybuffer);
522
523 connections[i].keyrequests.head = 0;
524 connections[i].keyrequests.tail = 0;
525 connections[i].keyrequests.items = MAX_KEYREQUESTS_BUFFERED;
526 connections[i].keyrequest_counter = 0;
527
528 if (screenbuffer_init(&connections[i].screenbuffer,
529 fb_info.cols, fb_info.rows) == NULL) {
530 /* FIXME: handle error */
531 return -1;
532 }
533 }
534 connections[KERNEL_CONSOLE].used = 1;
535
536 interbuffer = mmap(NULL,
537 sizeof(keyfield_t) * fb_info.cols * fb_info.rows,
538 PROTO_READ | PROTO_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
539 if (!interbuffer) {
540 if (ipc_share_out_start(fb_info.phone, interbuffer,
541 AS_AREA_READ) != EOK) {
542 munmap(interbuffer,
543 sizeof(keyfield_t) * fb_info.cols * fb_info.rows);
544 interbuffer = NULL;
545 }
546 }
547
548 curs_goto(0, 0);
549 curs_visibility(
550 connections[active_console].screenbuffer.is_cursor_visible);
551
552 /* Register at NS */
553 if (ipc_connect_to_me(PHONE_NS, SERVICE_CONSOLE, 0, 0, &phonehash) != 0) {
554 return -1;
555 }
556
557 async_manager();
558
559 return 0;
560}
561
562/** @}
563 */
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