source: mainline/fb/ega.c@ d32af35

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since d32af35 was 1ed15cd, checked in by Jakub Vana <jakub.vana@…>, 20 years ago

Next some coding style changes
  • Property mode set to 100644
File size: 8.1 KB
Line 
1/*
2 * Copyright (C) 2006 Ondrej Palkovsky
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#include <stdlib.h>
29#include <unistd.h>
30#include <align.h>
31#include <async.h>
32#include <ipc/ipc.h>
33#include <errno.h>
34#include <stdio.h>
35#include <ddi.h>
36#include <sysinfo.h>
37#include <as.h>
38#include <ipc/fb.h>
39#include <ipc/ipc.h>
40#include <ipc/ns.h>
41#include <ipc/services.h>
42
43#include "ega.h"
44#include "../console/screenbuffer.h"
45#include "main.h"
46
47#define MAX_SAVED_SCREENS 256
48typedef struct saved_screen {
49 short *data;
50} saved_screen;
51
52saved_screen saved_screens[MAX_SAVED_SCREENS];
53
54
55#define EGA_IO_ADDRESS 0x3d4
56#define EGA_IO_SIZE 2
57
58typedef unsigned char u8;
59typedef unsigned short u16;
60typedef unsigned int u32;
61
62
63/* Allow only 1 connection */
64static int client_connected = 0;
65
66static unsigned int scr_width;
67static unsigned int scr_height;
68static char *scr_addr;
69
70static unsigned int style = 0x1e;
71
72static inline void outb(u16 port, u8 b)
73{
74 asm volatile ("outb %0, %1\n" :: "a" (b), "d" (port));
75}
76
77static inline void outw(u16 port, u16 w)
78{
79 asm volatile ("outw %0, %1\n" :: "a" (w), "d" (port));
80}
81
82static inline void outl(u16 port, u32 l)
83{
84 asm volatile ("outl %0, %1\n" :: "a" (l), "d" (port));
85}
86
87static inline u8 inb(u16 port)
88{
89 u8 val;
90
91 asm volatile ("inb %1, %0 \n" : "=a" (val) : "d"(port));
92 return val;
93}
94
95static inline u16 inw(u16 port)
96{
97 u16 val;
98
99 asm volatile ("inw %1, %0 \n" : "=a" (val) : "d"(port));
100 return val;
101}
102
103static inline u32 inl(u16 port)
104{
105 u32 val;
106
107 asm volatile ("inl %1, %0 \n" : "=a" (val) : "d"(port));
108 return val;
109}
110
111
112
113
114static void clrscr(void)
115{
116 int i;
117
118 for (i=0; i < scr_width*scr_height; i++) {
119 scr_addr[i*2] = ' ';
120 scr_addr[i*2+1] = style;
121 }
122}
123
124static void cursor_goto(unsigned int row, unsigned int col)
125{
126 int ega_cursor;
127
128 ega_cursor=col+scr_width*row;
129
130 outb(EGA_IO_ADDRESS , 0xe);
131 outb(EGA_IO_ADDRESS + 1, (ega_cursor >>8) & 0xff);
132 outb(EGA_IO_ADDRESS , 0xf);
133 outb(EGA_IO_ADDRESS + 1, ega_cursor & 0xff);
134}
135
136static void cursor_disable(void)
137{
138 u8 stat;
139 outb(EGA_IO_ADDRESS , 0xa);
140 stat=inb(EGA_IO_ADDRESS + 1);
141 outb(EGA_IO_ADDRESS , 0xa);
142 outb(EGA_IO_ADDRESS +1 ,stat | (1<<5) );
143}
144
145static void cursor_enable(void)
146{
147 u8 stat;
148 outb(EGA_IO_ADDRESS , 0xa);
149 stat=inb(EGA_IO_ADDRESS + 1);
150 outb(EGA_IO_ADDRESS , 0xa);
151 outb(EGA_IO_ADDRESS +1 ,stat & (~(1<<5)) );
152}
153
154static void scroll(int rows)
155{
156 int i;
157 if (rows > 0) {
158 memcpy (scr_addr,((char *)scr_addr) + rows * scr_width * 2, scr_width * scr_height * 2 - rows * scr_width * 2);
159 for (i = 0; i < rows * scr_width ; i ++)
160 (((short *)scr_addr) + scr_width * scr_height - rows * scr_width) [i] = ((style << 8) + ' ');
161 } else if (rows < 0) {
162
163 memcpy (((char *)scr_addr) - rows * scr_width * 2 ,scr_addr ,scr_width * scr_height * 2 + rows * scr_width * 2);
164 for (i = 0; i < - rows * scr_width ; i++)
165 ((short *)scr_addr) [i] = ((style << 8 ) + ' ');
166 }
167}
168
169static void printchar(char c, unsigned int row, unsigned int col)
170{
171 scr_addr[(row*scr_width + col)*2] = c;
172 scr_addr[(row*scr_width + col)*2+1] = style;
173
174 cursor_goto(row,col+1);
175}
176
177static void draw_text_data(keyfield_t *data)
178{
179 int i;
180
181 for (i=0; i < scr_width*scr_height; i++) {
182 scr_addr[i*2] = data[i].character;
183 if (data[i].style.fg_color > data[i].style.bg_color)
184 scr_addr[i*2+1] = 0x1e;
185 else
186 scr_addr[i*2+1] = 0xe1;
187 }
188}
189
190static int save_screen(void)
191{
192 int i;
193 short *mem;
194 for (i=0 ;( i < MAX_SAVED_SCREENS ) && (saved_screens[i].data); i++);
195 if (i == MAX_SAVED_SCREENS)
196 return EINVAL;
197 if (!(saved_screens[i].data=malloc( 2 * scr_width*scr_height )))
198 return ENOMEM;
199 memcpy (saved_screens[i].data ,scr_addr ,2 * scr_width * scr_height)
200 ;
201 return i;
202}
203
204static int print_screen(int i)
205{
206 if (saved_screens[i].data)
207 memcpy (scr_addr,saved_screens[i].data, 2 * scr_width * scr_height);
208 else return EINVAL;
209 return i;
210}
211
212
213static void ega_client_connection(ipc_callid_t iid, ipc_call_t *icall)
214{
215 int retval;
216 ipc_callid_t callid;
217 ipc_call_t call;
218 char c;
219 unsigned int row, col;
220 int bgcolor,fgcolor;
221 keyfield_t *interbuf = NULL;
222 size_t intersize = 0;
223 int i;
224
225 if (client_connected) {
226 ipc_answer_fast(iid, ELIMIT, 0,0);
227 return;
228 }
229 client_connected = 1;
230 ipc_answer_fast(iid, 0, 0, 0); /* Accept connection */
231
232 while (1) {
233 callid = async_get_call(&call);
234 switch (IPC_GET_METHOD(call)) {
235 case IPC_M_PHONE_HUNGUP:
236 client_connected = 0;
237 ipc_answer_fast(callid,0,0,0);
238 return; /* Exit thread */
239 case IPC_M_AS_AREA_SEND:
240 /* We accept one area for data interchange */
241 intersize = IPC_GET_ARG2(call);
242 if (intersize >= scr_width*scr_height*sizeof(*interbuf)) {
243 receive_comm_area(callid,&call,(void **)&interbuf);
244 continue;
245 }
246 retval = EINVAL;
247 break;
248 case FB_DRAW_TEXT_DATA:
249 if (!interbuf) {
250 retval = EINVAL;
251 break;
252 }
253 draw_text_data(interbuf);
254 retval = 0;
255 break;
256 case FB_GET_CSIZE:
257 ipc_answer_fast(callid, 0, scr_height, scr_width);
258 continue;
259 case FB_CLEAR:
260 clrscr();
261 retval = 0;
262 break;
263 case FB_PUTCHAR:
264 c = IPC_GET_ARG1(call);
265 row = IPC_GET_ARG2(call);
266 col = IPC_GET_ARG3(call);
267 if (col >= scr_width || row >= scr_height) {
268 retval = EINVAL;
269 break;
270 }
271 printchar(c,row,col);
272 retval = 0;
273 break;
274 case FB_CURSOR_GOTO:
275 row = IPC_GET_ARG1(call);
276 col = IPC_GET_ARG2(call);
277 if (row >= scr_height || col >= scr_width) {
278 retval = EINVAL;
279 break;
280 }
281 cursor_goto(row,col);
282 retval = 0;
283 break;
284 case FB_SCROLL:
285 i = IPC_GET_ARG1(call);
286 if (i > scr_height || i < (- (int)scr_height)) {
287 retval = EINVAL;
288 break;
289 }
290 scroll(i);
291 retval = 0;
292 break;
293 case FB_CURSOR_VISIBILITY:
294 if(IPC_GET_ARG1(call))
295 cursor_enable();
296 else
297 cursor_disable();
298 retval = 0;
299 break;
300 case FB_SET_STYLE:
301 fgcolor = IPC_GET_ARG1(call);
302 bgcolor = IPC_GET_ARG2(call);
303 if (fgcolor > bgcolor)
304 style = 0x1e;
305 else
306 style = 0xe1;
307
308 case FB_VP_DRAW_PIXMAP:
309 i = IPC_GET_ARG2(call);
310 retval = print_screen(i);
311 break;
312 case FB_VP2PIXMAP:
313 retval = save_screen();
314 break;
315 case FB_DROP_PIXMAP:
316 i = IPC_GET_ARG1(call);
317 if (i >= MAX_SAVED_SCREENS) {
318 retval = EINVAL;
319 break;
320 }
321 if (saved_screens[i].data) {
322 free(saved_screens[i].data);
323 saved_screens[i].data = NULL;
324 }
325 break;
326
327 default:
328 retval = ENOENT;
329 }
330 ipc_answer_fast(callid,retval,0,0);
331 }
332}
333
334int ega_init(void)
335{
336 void *ega_ph_addr;
337 size_t sz;
338
339
340 ega_ph_addr=(void *)sysinfo_value("fb.address.physical");
341 scr_width=sysinfo_value("fb.width");
342 scr_height=sysinfo_value("fb.height");
343 iospace_enable(task_get_id(),(void *)EGA_IO_ADDRESS,2);
344
345 sz = scr_width*scr_height*2;
346 scr_addr = as_get_mappable_page(sz);
347
348 map_physmem(ega_ph_addr, scr_addr, ALIGN_UP(sz,PAGE_SIZE)>>PAGE_WIDTH,
349 AS_AREA_READ | AS_AREA_WRITE);
350
351 async_set_client_connection(ega_client_connection);
352
353 return 0;
354}
355
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