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836 palkovsky 1
/*
2071 jermar 2
 * Copyright (c) 2006 Ondrej Palkovsky
836 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
 
1790 jermar 29
/** @addtogroup genarch
1702 cejka 30
 * @{
31
 */
32
/** @file
33
 */
34
 
837 palkovsky 35
#include <genarch/fb/font-8x16.h>
1993 decky 36
#include <genarch/fb/visuals.h>
837 palkovsky 37
#include <genarch/fb/fb.h>
836 palkovsky 38
#include <console/chardev.h>
39
#include <console/console.h>
1317 vana 40
#include <sysinfo/sysinfo.h>
1316 jermar 41
#include <mm/slab.h>
839 palkovsky 42
#include <panic.h>
896 jermar 43
#include <memstr.h>
1316 jermar 44
#include <config.h>
1682 palkovsky 45
#include <bitops.h>
46
#include <print.h>
2015 jermar 47
#include <ddi/ddi.h>
2054 jermar 48
#include <arch/types.h>
836 palkovsky 49
 
862 palkovsky 50
#include "helenos.xbm"
51
 
2015 jermar 52
static parea_t fb_parea;        /**< Physical memory area for fb. */
53
 
836 palkovsky 54
SPINLOCK_INITIALIZE(fb_lock);
55
 
1780 jermar 56
static uint8_t *fbaddress = NULL;
836 palkovsky 57
 
1780 jermar 58
static uint8_t *blankline = NULL;
2054 jermar 59
static uint8_t *dbbuffer = NULL;    /* Buffer for fast scrolling console */
60
static index_t dboffset;
1316 jermar 61
 
1135 decky 62
static unsigned int xres = 0;
63
static unsigned int yres = 0;
64
static unsigned int scanline = 0;
65
static unsigned int pixelbytes = 0;
1875 jermar 66
#ifdef FB_INVERT_COLORS
67
static bool invert_colors = true;
68
#else
69
static bool invert_colors = false;
70
#endif
836 palkovsky 71
 
1135 decky 72
static unsigned int position = 0;
73
static unsigned int columns = 0;
74
static unsigned int rows = 0;
836 palkovsky 75
 
1135 decky 76
#define COL_WIDTH   8
77
#define ROW_BYTES   (scanline * FONT_SCANLINES)
836 palkovsky 78
 
1135 decky 79
#define BGCOLOR     0x000080
80
#define FGCOLOR     0xffff00
81
#define LOGOCOLOR   0x2020b0
82
 
2086 jermar 83
#define RED(x, bits)    ((x >> (8 + 8 + 8 - bits)) & ((1 << bits) - 1))
1135 decky 84
#define GREEN(x, bits)  ((x >> (8 + 8 - bits)) & ((1 << bits) - 1))
85
#define BLUE(x, bits)   ((x >> (8 - bits)) & ((1 << bits) - 1))
86
 
1682 palkovsky 87
#define POINTPOS(x, y)  ((y) * scanline + (x) * pixelbytes)
1135 decky 88
 
838 palkovsky 89
/***************************************************************/
90
/* Pixel specific fuctions */
91
 
1682 palkovsky 92
static void (*rgb2scr)(void *, int);
93
static int (*scr2rgb)(void *);
839 palkovsky 94
 
1875 jermar 95
static inline int COLOR(int color)
96
{
97
    return invert_colors ? ~color : color;
98
}
99
 
1682 palkovsky 100
/* Conversion routines between different color representations */
1993 decky 101
static void rgb_byte0888(void *dst, int rgb)
836 palkovsky 102
{
1990 decky 103
    *((int *) dst) = rgb;
836 palkovsky 104
}
105
 
1993 decky 106
static int byte0888_rgb(void *src)
838 palkovsky 107
{
1990 decky 108
    return (*((int *) src)) & 0xffffff;
839 palkovsky 109
}
110
 
1994 decky 111
static void bgr_byte0888(void *dst, int rgb)
112
{
2086 jermar 113
    *((uint32_t *) dst) = BLUE(rgb, 8) << 16 | GREEN(rgb, 8) << 8 |
114
        RED(rgb, 8);
1994 decky 115
}
116
 
117
static int byte0888_bgr(void *src)
118
{
119
    int color = *(uint32_t *)(src);
2086 jermar 120
    return ((color & 0xff) << 16) | (((color >> 8) & 0xff) << 8) |
121
        ((color >> 16) & 0xff);
1994 decky 122
}
123
 
1993 decky 124
static void rgb_byte888(void *dst, int rgb)
839 palkovsky 125
{
2102 decky 126
    uint8_t *scr = (uint8_t *) dst;
1871 jermar 127
#if defined(FB_INVERT_ENDIAN)
1682 palkovsky 128
    scr[0] = RED(rgb, 8);
129
    scr[1] = GREEN(rgb, 8);
130
    scr[2] = BLUE(rgb, 8);
1298 vana 131
#else
1682 palkovsky 132
    scr[2] = RED(rgb, 8);
133
    scr[1] = GREEN(rgb, 8);
134
    scr[0] = BLUE(rgb, 8);
135
#endif
839 palkovsky 136
}
137
 
1993 decky 138
static int byte888_rgb(void *src)
839 palkovsky 139
{
2102 decky 140
    uint8_t *scr = (uint8_t *) src;
1871 jermar 141
#if defined(FB_INVERT_ENDIAN)
1682 palkovsky 142
    return scr[0] << 16 | scr[1] << 8 | scr[2];
1298 vana 143
#else
1682 palkovsky 144
    return scr[2] << 16 | scr[1] << 8 | scr[0];
1298 vana 145
#endif  
838 palkovsky 146
}
147
 
1993 decky 148
/**  16-bit depth (5:5:5) */
149
static void rgb_byte555(void *dst, int rgb)
150
{
151
    /* 5-bit, 5-bits, 5-bits */
2086 jermar 152
    *((uint16_t *) dst) = RED(rgb, 5) << 10 | GREEN(rgb, 5) << 5 |
153
        BLUE(rgb, 5);
1993 decky 154
}
155
 
156
/** 16-bit depth (5:5:5) */
157
static int byte555_rgb(void *src)
158
{
159
    int color = *(uint16_t *)(src);
2086 jermar 160
    return (((color >> 10) & 0x1f) << (16 + 3)) |
161
        (((color >> 5) & 0x1f) << (8 + 3)) | ((color & 0x1f) << 3);
1993 decky 162
}
163
 
1682 palkovsky 164
/**  16-bit depth (5:6:5) */
1993 decky 165
static void rgb_byte565(void *dst, int rgb)
839 palkovsky 166
{
1682 palkovsky 167
    /* 5-bit, 6-bits, 5-bits */
2086 jermar 168
    *((uint16_t *) dst) = RED(rgb, 5) << 11 | GREEN(rgb, 6) << 5 |
169
        BLUE(rgb, 5);
839 palkovsky 170
}
171
 
1682 palkovsky 172
/** 16-bit depth (5:6:5) */
1993 decky 173
static int byte565_rgb(void *src)
839 palkovsky 174
{
1780 jermar 175
    int color = *(uint16_t *)(src);
2086 jermar 176
    return (((color >> 11) & 0x1f) << (16 + 3)) |
177
        (((color >> 5) & 0x3f) << (8 + 2)) | ((color & 0x1f) << 3);
839 palkovsky 178
}
179
 
1837 jermar 180
/** Put pixel - 8-bit depth (color palette/3:2:3)
181
 *
182
 * Even though we try 3:2:3 color scheme here, an 8-bit framebuffer
183
 * will most likely use a color palette. The color appearance
184
 * will be pretty random and depend on the default installed
185
 * palette. This could be fixed by supporting custom palette
186
 * and setting it to simulate the 8-bit truecolor.
187
 */
1993 decky 188
static void rgb_byte8(void *dst, int rgb)
839 palkovsky 189
{
2086 jermar 190
    *((uint8_t *) dst) = RED(rgb, 3) << 5 | GREEN(rgb, 2) << 3 |
191
        BLUE(rgb, 3);
1135 decky 192
}
839 palkovsky 193
 
1837 jermar 194
/** Return pixel color - 8-bit depth (color palette/3:2:3)
195
 *
1993 decky 196
 * See the comment for rgb_byte().
1837 jermar 197
 */
1993 decky 198
static int byte8_rgb(void *src)
1135 decky 199
{
1780 jermar 200
    int color = *(uint8_t *)src;
2086 jermar 201
    return (((color >> 5) & 0x7) << (16 + 5)) |
202
        (((color >> 3) & 0x3) << (8 + 6)) | ((color & 0x7) << 5);
839 palkovsky 203
}
204
 
1682 palkovsky 205
static void putpixel(unsigned int x, unsigned int y, int color)
1135 decky 206
{
1990 decky 207
    (*rgb2scr)(&fbaddress[POINTPOS(x, y)], COLOR(color));
1682 palkovsky 208
 
209
    if (dbbuffer) {
210
        int dline = (y + dboffset) % yres;
1990 decky 211
        (*rgb2scr)(&dbbuffer[POINTPOS(x, dline)], COLOR(color));
1682 palkovsky 212
    }
1135 decky 213
}
839 palkovsky 214
 
1682 palkovsky 215
/** Get pixel from viewport */
216
static int getpixel(unsigned int x, unsigned int y)
217
{
218
    if (dbbuffer) {
219
        int dline = (y + dboffset) % yres;
1990 decky 220
        return COLOR((*scr2rgb)(&dbbuffer[POINTPOS(x, dline)]));
1682 palkovsky 221
    }
1990 decky 222
    return COLOR((*scr2rgb)(&fbaddress[POINTPOS(x, y)]));
1682 palkovsky 223
}
1135 decky 224
 
1682 palkovsky 225
 
1135 decky 226
/** Fill screen with background color */
227
static void clear_screen(void)
839 palkovsky 228
{
1135 decky 229
    unsigned int y;
839 palkovsky 230
 
1682 palkovsky 231
    for (y = 0; y < yres; y++) {
1990 decky 232
        memcpy(&fbaddress[scanline * y], blankline, xres * pixelbytes);
1682 palkovsky 233
        if (dbbuffer)
2086 jermar 234
            memcpy(&dbbuffer[scanline * y], blankline,
235
                xres * pixelbytes);
1682 palkovsky 236
    }
839 palkovsky 237
}
238
 
1135 decky 239
 
838 palkovsky 240
/** Scroll screen one row up */
241
static void scroll_screen(void)
242
{
1682 palkovsky 243
    if (dbbuffer) {
2054 jermar 244
        count_t first;
245
 
2086 jermar 246
        /* Clear the last row */
1993 decky 247
        memcpy(&dbbuffer[dboffset * scanline], blankline, ROW_BYTES);
1682 palkovsky 248
 
249
        dboffset = (dboffset + FONT_SCANLINES) % yres;
2054 jermar 250
        first = yres - dboffset;
2086 jermar 251
 
252
        /* Move all rows one row up */
253
        if (xres * pixelbytes == scanline) {
254
            memcpy(fbaddress, &dbbuffer[dboffset * scanline],
255
                first * scanline);
256
            memcpy(&fbaddress[first * scanline], dbbuffer,
257
                dboffset * scanline);
258
        } else {
259
            /*
260
             * When the scanline is bigger than number of bytes
261
             * in the X-resolution, chances are that the
262
             * frame buffer memory past the X-resolution is special
263
             * in some way. For example, the SUNW,ffb framebuffer
264
             * wraps this area around the beginning of the same
265
             * line. To avoid troubles, copy only memory as
266
             * specified by the resolution.
267
             */
2102 decky 268
            unsigned int i;
838 palkovsky 269
 
2086 jermar 270
            for (i = 0; i < first; i++)
271
                memcpy(&fbaddress[i * scanline],
272
                    &dbbuffer[(dboffset + i) * scanline],
273
                    xres * pixelbytes);
274
            for (i = 0; i < dboffset; i++)
275
                memcpy(&fbaddress[(first + i) * scanline],
276
                    &dbbuffer[i * scanline], xres * pixelbytes);
277
        }
1682 palkovsky 278
    } else {
2054 jermar 279
        uint8_t *lastline = &fbaddress[(rows - 1) * ROW_BYTES];
280
 
2086 jermar 281
        if (xres * pixelbytes == scanline) {
282
            /* Move all rows one row up */
283
            memcpy((void *) fbaddress,
284
                (void *) &fbaddress[ROW_BYTES],
285
                scanline * yres - ROW_BYTES);
286
            /* Clear the last row */
287
            memcpy((void *) lastline, (void *) blankline,
288
                ROW_BYTES);
289
        } else {
290
            /*
291
             * See the comment in the dbbuffer case.
292
             */
2102 decky 293
            unsigned int i;
2086 jermar 294
 
295
            /* Move all rows one row up */
296
            for (i = 0; i < yres - FONT_SCANLINES; i++)
297
                memcpy(&fbaddress[i * scanline],
298
                    &fbaddress[(i + FONT_SCANLINES) * scanline],
299
                    xres * pixelbytes);
300
            /* Clear the last row */
301
            for (i = 0; i < FONT_SCANLINES; i++)
302
                memcpy(&lastline[i * scanline],
303
                    &blankline[i * scanline],
304
                    xres * pixelbytes);
305
        }
1682 palkovsky 306
    }
838 palkovsky 307
}
308
 
309
 
1135 decky 310
static void invert_pixel(unsigned int x, unsigned int y)
836 palkovsky 311
{
1682 palkovsky 312
    putpixel(x, y, ~getpixel(x, y));
836 palkovsky 313
}
314
 
315
 
316
/** Draw one line of glyph at a given position */
1135 decky 317
static void draw_glyph_line(unsigned int glline, unsigned int x, unsigned int y)
836 palkovsky 318
{
1135 decky 319
    unsigned int i;
836 palkovsky 320
 
1135 decky 321
    for (i = 0; i < 8; i++)
322
        if (glline & (1 << (7 - i))) {
1682 palkovsky 323
            putpixel(x + i, y, FGCOLOR);
836 palkovsky 324
        } else
1682 palkovsky 325
            putpixel(x + i, y, BGCOLOR);
836 palkovsky 326
}
327
 
838 palkovsky 328
/***************************************************************/
329
/* Character-console functions */
330
 
836 palkovsky 331
/** Draw character at given position */
1780 jermar 332
static void draw_glyph(uint8_t glyph, unsigned int col, unsigned int row)
836 palkovsky 333
{
1135 decky 334
    unsigned int y;
836 palkovsky 335
 
1135 decky 336
    for (y = 0; y < FONT_SCANLINES; y++)
2086 jermar 337
        draw_glyph_line(fb_font[glyph * FONT_SCANLINES + y],
338
            col * COL_WIDTH, row * FONT_SCANLINES + y);
836 palkovsky 339
}
340
 
341
/** Invert character at given position */
1135 decky 342
static void invert_char(unsigned int col, unsigned int row)
836 palkovsky 343
{
1135 decky 344
    unsigned int x;
345
    unsigned int y;
836 palkovsky 346
 
1135 decky 347
    for (x = 0; x < COL_WIDTH; x++)
348
        for (y = 0; y < FONT_SCANLINES; y++)
2086 jermar 349
            invert_pixel(col * COL_WIDTH + x,
350
                row * FONT_SCANLINES + y);
836 palkovsky 351
}
352
 
353
/** Draw character at default position */
354
static void draw_char(char chr)
355
{
1135 decky 356
    draw_glyph(chr, position % columns, position / columns);
836 palkovsky 357
}
358
 
1135 decky 359
static void draw_logo(unsigned int startx, unsigned int starty)
862 palkovsky 360
{
1135 decky 361
    unsigned int x;
362
    unsigned int y;
363
    unsigned int byte;
364
    unsigned int rowbytes;
862 palkovsky 365
 
1135 decky 366
    rowbytes = (helenos_width - 1) / 8 + 1;
862 palkovsky 367
 
1135 decky 368
    for (y = 0; y < helenos_height; y++)
369
        for (x = 0; x < helenos_width; x++) {
370
            byte = helenos_bits[rowbytes * y + x / 8];
862 palkovsky 371
            byte >>= x % 8;
372
            if (byte & 1)
2054 jermar 373
                putpixel(startx + x, starty + y,
2086 jermar 374
                    COLOR(LOGOCOLOR));
862 palkovsky 375
        }
376
}
377
 
838 palkovsky 378
/***************************************************************/
379
/* Stdout specific functions */
380
 
836 palkovsky 381
static void invert_cursor(void)
382
{
1135 decky 383
    invert_char(position % columns, position / columns);
836 palkovsky 384
}
385
 
386
/** Print character to screen
387
 *
388
 *  Emulate basic terminal commands
389
 */
390
static void fb_putchar(chardev_t *dev, char ch)
391
{
1287 vana 392
    spinlock_lock(&fb_lock);
1135 decky 393
 
394
    switch (ch) {
1888 jermar 395
    case '\n':
396
        invert_cursor();
397
        position += columns;
398
        position -= position % columns;
399
        break;
400
    case '\r':
401
        invert_cursor();
402
        position -= position % columns;
403
        break;
404
    case '\b':
405
        invert_cursor();
406
        if (position % columns)
407
            position--;
408
        break;
409
    case '\t':
410
        invert_cursor();
411
        do {
412
            draw_char(' ');
838 palkovsky 413
            position++;
1888 jermar 414
        } while ((position % 8) && position < columns * rows);
415
        break;
416
    default:
417
        draw_char(ch);
418
        position++;
836 palkovsky 419
    }
1135 decky 420
 
421
    if (position >= columns * rows) {
836 palkovsky 422
        position -= columns;
423
        scroll_screen();
424
    }
1135 decky 425
 
836 palkovsky 426
    invert_cursor();
1135 decky 427
 
1287 vana 428
    spinlock_unlock(&fb_lock);
836 palkovsky 429
}
430
 
431
static chardev_t framebuffer;
432
static chardev_operations_t fb_ops = {
433
    .write = fb_putchar,
434
};
435
 
436
 
437
/** Initialize framebuffer as a chardev output device
438
 *
3675 svoboda 439
 * @param props     Properties of the framebuffer device.
836 palkovsky 440
 */
3675 svoboda 441
void fb_init(fb_properties_t *props)
836 palkovsky 442
{
3675 svoboda 443
    switch (props->visual) {
1993 decky 444
    case VISUAL_INDIRECT_8:
445
        rgb2scr = rgb_byte8;
446
        scr2rgb = byte8_rgb;
1991 jermar 447
        pixelbytes = 1;
448
        break;
1993 decky 449
    case VISUAL_RGB_5_5_5:
450
        rgb2scr = rgb_byte555;
451
        scr2rgb = byte555_rgb;
1991 jermar 452
        pixelbytes = 2;
453
        break;
1993 decky 454
    case VISUAL_RGB_5_6_5:
455
        rgb2scr = rgb_byte565;
456
        scr2rgb = byte565_rgb;
457
        pixelbytes = 2;
1991 jermar 458
        break;
1993 decky 459
    case VISUAL_RGB_8_8_8:
460
        rgb2scr = rgb_byte888;
461
        scr2rgb = byte888_rgb;
462
        pixelbytes = 3;
463
        break;
464
    case VISUAL_RGB_8_8_8_0:
465
        rgb2scr = rgb_byte888;
466
        scr2rgb = byte888_rgb;
1991 jermar 467
        pixelbytes = 4;
468
        break;
1993 decky 469
    case VISUAL_RGB_0_8_8_8:
470
        rgb2scr = rgb_byte0888;
471
        scr2rgb = byte0888_rgb;
472
        pixelbytes = 4;
473
        break;
1994 decky 474
    case VISUAL_BGR_0_8_8_8:
475
        rgb2scr = bgr_byte0888;
476
        scr2rgb = byte0888_bgr;
477
        pixelbytes = 4;
478
        break;
1991 jermar 479
    default:
1993 decky 480
        panic("Unsupported visual.\n");
839 palkovsky 481
    }
1371 decky 482
 
3684 svoboda 483
    unsigned int fbsize = props->scan * props->y;
1371 decky 484
 
485
    /* Map the framebuffer */
3684 svoboda 486
    fbaddress = (uint8_t *) hw_map((uintptr_t) props->addr + props->offset,
487
        fbsize);
3675 svoboda 488
    fbaddress += props->offset;
1371 decky 489
 
3675 svoboda 490
    xres = props->x;
491
    yres = props->y;
492
    scanline = props->scan;
836 palkovsky 493
 
3675 svoboda 494
    rows = props->y / FONT_SCANLINES;
495
    columns = props->x / COL_WIDTH;
836 palkovsky 496
 
3675 svoboda 497
    fb_parea.pbase = (uintptr_t) props->addr;
2015 jermar 498
    fb_parea.vbase = (uintptr_t) fbaddress;
499
    fb_parea.frames = SIZE2FRAMES(fbsize);
500
    fb_parea.cacheable = false;
501
    ddi_parea_register(&fb_parea);
502
 
1690 palkovsky 503
    sysinfo_set_item_val("fb", NULL, true);
504
    sysinfo_set_item_val("fb.kind", NULL, 1);
505
    sysinfo_set_item_val("fb.width", NULL, xres);
506
    sysinfo_set_item_val("fb.height", NULL, yres);
3675 svoboda 507
    sysinfo_set_item_val("fb.scanline", NULL, props->scan);
508
    sysinfo_set_item_val("fb.visual", NULL, props->visual);
509
    sysinfo_set_item_val("fb.address.physical", NULL, props->addr);
3684 svoboda 510
    sysinfo_set_item_val("fb.offset", NULL, props->offset);
1875 jermar 511
    sysinfo_set_item_val("fb.invert-colors", NULL, invert_colors);
1690 palkovsky 512
 
1682 palkovsky 513
    /* Allocate double buffer */
2054 jermar 514
    unsigned int order = fnzb(SIZE2FRAMES(fbsize) - 1) + 1;
515
    dbbuffer = (uint8_t *) frame_alloc(order, FRAME_ATOMIC | FRAME_KA);
1760 palkovsky 516
    if (!dbbuffer)
1682 palkovsky 517
        printf("Failed to allocate scroll buffer.\n");
518
    dboffset = 0;
519
 
520
    /* Initialized blank line */
1780 jermar 521
    blankline = (uint8_t *) malloc(ROW_BYTES, FRAME_ATOMIC);
1766 palkovsky 522
    if (!blankline)
523
        panic("Failed to allocate blank line for framebuffer.");
3675 svoboda 524
    unsigned int x, y;
1990 decky 525
    for (y = 0; y < FONT_SCANLINES; y++)
526
        for (x = 0; x < xres; x++)
527
            (*rgb2scr)(&blankline[POINTPOS(x, y)], COLOR(BGCOLOR));
528
 
1682 palkovsky 529
    clear_screen();
530
 
531
    /* Update size of screen to match text area */
532
    yres = rows * FONT_SCANLINES;
533
 
1135 decky 534
    draw_logo(xres - helenos_width, 0);
836 palkovsky 535
    invert_cursor();
536
 
537
    chardev_initialize("fb", &framebuffer, &fb_ops);
538
    stdout = &framebuffer;
539
}
1702 cejka 540
 
1790 jermar 541
/** @}
1702 cejka 542
 */