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2340 Serge 1
 
2
3
 
2338 Serge 4
#include "drm.h"
5
#include "i915_drm.h"
6
#include "i915_drv.h"
7
#include "intel_drv.h"
8
9
 
10
#include 
11
#include 
12
#include 
13
#include 
14
15
 
16
17
 
2340 Serge 18
2338 Serge 19
 
20
{
21
    kobj_t     header;
22
23
 
24
    uint32_t   hot_x;
25
    uint32_t   hot_y;
26
27
 
28
    struct drm_i915_gem_object  *cobj;
29
}cursor_t;
30
31
 
32
#define CURSOR_HEIGHT 64
33
34
 
35
 
36
{
37
    int  x;
38
    int  y;
39
    int  width;
40
    int  height;
41
    int  bpp;
42
    int  vrefresh;
43
    int  pitch;
44
    int  lfb;
45
46
 
47
    struct drm_device    *ddev;
48
    struct drm_connector *connector;
49
    struct drm_crtc      *crtc;
50
51
 
52
53
 
54
    int       (*init_cursor)(cursor_t*);
55
    cursor_t* (__stdcall *select_cursor)(cursor_t*);
56
    void      (*show_cursor)(int show);
57
    void      (__stdcall *move_cursor)(cursor_t *cursor, int x, int y);
58
    void      (__stdcall *restore_cursor)(int x, int y);
59
    void      (*disable_mouse)(void);
60
    u32  mask_seqno;
2361 Serge 61
    u32  check_mouse;
3031 serge 62
    u32  check_m_pixel;
63
64
 
2338 Serge 65
66
 
67
 
68
69
 
2340 Serge 70
u32_t cmd_offset;
71
72
 
2351 Serge 73
int  sna_init();
74
75
 
2338 Serge 76
static cursor_t*  __stdcall select_cursor_kms(cursor_t *cursor);
77
static void       __stdcall move_cursor_kms(cursor_t *cursor, int x, int y);
78
79
 
80
{};
81
82
 
83
{};
84
85
 
3031 serge 86
{
87
    static char name[4];
88
89
 
90
    name[1] = ((x[0] & 0x03) << 3) + ((x[1] & 0xE0) >> 5) + '@';
91
    name[2] = (x[1] & 0x1F) + '@';
92
    name[3] = 0;
93
94
 
95
}
96
97
 
98
              videomode_t *reqmode, bool strict)
99
{
100
    drm_i915_private_t      *dev_priv   = dev->dev_private;
101
    struct drm_fb_helper    *fb_helper  = &dev_priv->fbdev->helper;
102
103
 
104
    struct drm_display_mode *mode       = NULL, *tmpmode;
105
    struct drm_framebuffer  *fb         = NULL;
106
    struct drm_crtc         *crtc;
107
    struct drm_encoder      *encoder;
108
    struct drm_i915_gem_object *fb_obj;
4280 Serge 109
    struct drm_mode_set     set;
3031 serge 110
    const char *con_name;
4371 Serge 111
    const char *enc_name;
112
    unsigned hdisplay, vdisplay;
3031 serge 113
    int ret;
114
115
 
116
117
 
118
    {
119
        if( (drm_mode_width(tmpmode)    == reqmode->width)  &&
120
            (drm_mode_height(tmpmode)   == reqmode->height) &&
121
            (drm_mode_vrefresh(tmpmode) == reqmode->freq) )
122
        {
123
            mode = tmpmode;
124
            goto do_set;
125
        }
126
    };
127
128
 
129
    {
130
        list_for_each_entry(tmpmode, &connector->modes, head)
131
        {
132
            if( (drm_mode_width(tmpmode)  == reqmode->width)  &&
133
                (drm_mode_height(tmpmode) == reqmode->height) )
134
            {
135
                mode = tmpmode;
136
                goto do_set;
137
            }
138
        };
139
    };
140
141
 
3037 serge 142
3031 serge 143
 
144
145
 
146
147
 
148
    crtc = encoder->crtc;
149
150
 
151
    enc_name = drm_get_encoder_name(encoder);
152
153
 
154
              reqmode->width, reqmode->height, crtc->base.id,
155
              con_name, enc_name);
156
157
 
158
159
 
160
    vdisplay = mode->vdisplay;
161
162
 
163
        swap(hdisplay, vdisplay);
164
165
 
4280 Serge 166
    fb = fb_helper->fb;
3031 serge 167
168
 
169
    fb->height = reqmode->height;
170
171
 
4280 Serge 172
                      fb->pitches[3]  = ALIGN(reqmode->width * 4, 512);
173
174
 
175
176
 
3031 serge 177
    fb->depth = 24;
178
179
 
180
    crtc->enabled = true;
181
    os_display->crtc = crtc;
182
183
 
4280 Serge 184
185
 
3031 serge 186
    set.x = 0;
187
    set.y = 0;
188
    set.mode = mode;
189
    set.connectors = &connector;
190
    set.num_connectors = 1;
191
    set.fb = fb;
192
    ret = crtc->funcs->set_config(&set);
193
    mutex_unlock(&dev->mode_config.mutex);
194
195
 
196
    {
197
        os_display->width    = fb->width;
198
        os_display->height   = fb->height;
199
        os_display->vrefresh = drm_mode_vrefresh(mode);
200
201
 
202
203
 
3037 serge 204
                       fb->width, fb->height, fb->pitches[0]);
3031 serge 205
    }
206
    else
207
        DRM_ERROR("failed to set mode %d_%d on crtc %p\n",
208
                   fb->width, fb->height, crtc);
209
210
 
211
}
212
213
 
2338 Serge 214
{
215
    struct drm_display_mode  *mode;
216
    int count = 0;
217
218
 
219
    {
220
        count++;
221
    };
222
    return count;
223
};
224
225
 
3031 serge 226
{
227
    struct drm_connector  *connector;
228
    struct drm_connector_helper_funcs *connector_funcs;
229
230
 
231
232
 
233
    {
234
        struct drm_encoder  *encoder;
235
        struct drm_crtc     *crtc;
236
237
 
238
            continue;
239
240
 
241
        encoder = connector_funcs->best_encoder(connector);
242
        if( encoder == NULL)
243
            continue;
244
245
 
246
247
 
248
249
 
3037 serge 250
                   connector, connector->base.id,
3031 serge 251
                   connector->status, connector->encoder,
252
                   crtc);
253
254
 
255
//            continue;
256
257
 
258
259
 
260
    };
261
262
 
263
};
264
265
 
4371 Serge 266
{
2338 Serge 267
    struct drm_connector *tmp = NULL;
4371 Serge 268
    struct drm_connector_helper_funcs *connector_funcs;
2338 Serge 269
    struct drm_encoder      *encoder;
270
271
 
4371 Serge 272
    {
2338 Serge 273
        if( tmp->status != connector_status_connected)
4371 Serge 274
            continue;
2338 Serge 275
276
 
4371 Serge 277
        encoder = connector_funcs->best_encoder(tmp);
278
        if( encoder == NULL)
2338 Serge 279
        {
280
            DRM_DEBUG_KMS("CONNECTOR %x ID: %d no active encoders\n",
3037 serge 281
                      tmp, tmp->base.id);
4371 Serge 282
            continue;
2338 Serge 283
        };
4371 Serge 284
2338 Serge 285
 
4371 Serge 286
287
 
4280 Serge 288
               tmp, tmp->base.id, tmp->status, tmp->encoder,
4371 Serge 289
               tmp->encoder->crtc, tmp->encoder->crtc->base.id );
290
2338 Serge 291
 
4371 Serge 292
    };
2338 Serge 293
294
 
4371 Serge 295
}
296
4280 Serge 297
 
4371 Serge 298
    {
2338 Serge 299
        struct drm_crtc *tmp_crtc;
300
        int crtc_mask = 1;
301
302
 
303
        {
304
            if (encoder->possible_crtcs & crtc_mask)
305
            {
306
            encoder->crtc = tmp_crtc;
4371 Serge 307
            dbgprintf("CRTC %p\n", tmp_crtc);
308
            return tmp_crtc;
309
            };
2338 Serge 310
            crtc_mask <<= 1;
311
        };
312
    return NULL;
4371 Serge 313
    };
2338 Serge 314
315
 
4371 Serge 316
{
317
    struct drm_display_mode *mode;
318
319
 
320
    {
321
        dbgprintf("check mode w:%d h:%d %dHz\n",
322
                drm_mode_width(mode), drm_mode_height(mode),
323
                drm_mode_vrefresh(mode));
324
325
 
326
            os_display->height == drm_mode_height(mode) &&
327
            drm_mode_vrefresh(mode) == 60)
328
        {
329
            usermode->width  = os_display->width;
330
            usermode->height = os_display->height;
331
            usermode->freq   = 60;
332
            return 1;
333
        }
334
    }
335
    return 0;
336
}
337
338
 
339
{
340
    struct drm_connector    *connector;
341
    struct drm_connector_helper_funcs *connector_funcs;
342
    struct drm_encoder      *encoder;
343
    struct drm_crtc         *crtc;
344
    struct drm_framebuffer  *fb;
345
346
 
347
    u32_t      ifl;
348
    int        err;
349
350
 
351
352
 
353
354
 
355
    if(connector == NULL)
356
    {
357
        DRM_DEBUG_KMS("No active connectors!\n");
358
        mutex_unlock(&dev->mode_config.mutex);
359
        return -1;
360
    };
361
362
 
363
    crtc = encoder->crtc;
364
365
 
366
        crtc = get_possible_crtc(dev, encoder);
367
368
 
4280 Serge 369
370
 
2338 Serge 371
    {
372
        DRM_DEBUG_KMS("No CRTC for encoder %d\n", encoder->base.id);
4280 Serge 373
        mutex_unlock(&dev->mode_config.mutex);
374
        return -1;
2338 Serge 375
    };
376
377
 
4280 Serge 378
2338 Serge 379
 
380
    os_display->ddev = dev;
381
    os_display->connector = connector;
382
    os_display->crtc = crtc;
383
384
 
385
386
 
387
 
388
    {
389
        struct intel_crtc *intel_crtc = to_intel_crtc(os_display->crtc);
390
391
 
392
        {
393
            init_cursor(cursor);
394
        };
395
396
 
397
        os_display->init_cursor    = init_cursor;
398
        os_display->select_cursor  = select_cursor_kms;
399
        os_display->show_cursor    = NULL;
400
        os_display->move_cursor    = move_cursor_kms;
401
        os_display->restore_cursor = restore_cursor;
402
        os_display->disable_mouse  = disable_mouse;
403
404
 
405
        intel_crtc->cursor_y = os_display->height/2;
406
407
 
408
    };
409
    safe_sti(ifl);
410
411
 
4280 Serge 412
        (usermode->height == 0))
413
    {
414
        if( !get_boot_mode(connector, usermode))
4371 Serge 415
        {
416
        struct drm_display_mode *mode;
4280 Serge 417
418
 
419
            usermode->width  = drm_mode_width(mode);
420
            usermode->height = drm_mode_height(mode);
421
            usermode->freq   = drm_mode_vrefresh(mode);
422
        };
423
    };
424
425
 
426
427
 
428
429
 
3243 Serge 430
    err = init_bitmaps();
2342 Serge 431
#endif
3243 Serge 432
2340 Serge 433
 
4280 Serge 434
435
 
2338 Serge 436
};
437
438
 
439
 
440
{
441
    int err = -1;
442
443
 
3031 serge 444
2338 Serge 445
 
446
    {
447
        *count = os_display->supported_modes;
448
        err = 0;
449
    }
450
    else if( mode != NULL )
451
    {
452
        struct drm_display_mode  *drmmode;
453
        int i = 0;
454
455
 
456
            *count = os_display->supported_modes;
457
458
 
459
        {
460
            if( i < *count)
461
            {
462
                mode->width  = drm_mode_width(drmmode);
463
                mode->height = drm_mode_height(drmmode);
464
                mode->bpp    = 32;
465
                mode->freq   = drm_mode_vrefresh(drmmode);
466
                i++;
467
                mode++;
468
            }
469
            else break;
470
        };
471
        *count = i;
472
        err = 0;
473
    };
474
    return err;
475
};
476
477
 
478
{
479
    int err = -1;
480
481
 
3031 serge 482
//               mode->width, mode->height, mode->freq);
483
2338 Serge 484
 
485
        (mode->height != 0)  &&
486
        (mode->freq   != 0 ) &&
487
        ( (mode->width   != os_display->width)  ||
488
          (mode->height  != os_display->height) ||
489
          (mode->freq    != os_display->vrefresh) ) )
490
    {
491
        if( set_mode(os_display->ddev, os_display->connector, mode, true) )
492
            err = 0;
493
    };
494
495
 
496
};
497
498
 
4126 Serge 499
{
500
    const struct drm_connector_funcs *f = os_display->connector->funcs;
4371 Serge 501
4126 Serge 502
 
503
};
504
505
 
2338 Serge 506
{
507
    list_del(&cursor->list);
3037 serge 508
2342 Serge 509
 
3037 serge 510
511
 
512
    drm_gem_object_unreference(&cursor->cobj->base);
513
    mutex_unlock(&main_device->struct_mutex);
514
515
 
2338 Serge 516
};
517
518
 
519
{
520
    struct drm_i915_private *dev_priv = os_display->ddev->dev_private;
521
    struct drm_i915_gem_object *obj;
522
    uint32_t *bits;
523
    uint32_t *src;
524
    void     *mapped;
3037 serge 525
2338 Serge 526
 
527
    int       ret;
528
529
 
530
    {
531
        bits = (uint32_t*)KernelAlloc(CURSOR_WIDTH*CURSOR_HEIGHT*4);
532
        if (unlikely(bits == NULL))
533
            return ENOMEM;
534
        cursor->cobj = (struct drm_i915_gem_object *)GetPgAddr(bits);
535
    }
536
    else
537
    {
538
        obj = i915_gem_alloc_object(os_display->ddev, CURSOR_WIDTH*CURSOR_HEIGHT*4);
539
        if (unlikely(obj == NULL))
540
            return -ENOMEM;
541
542
 
4104 Serge 543
        if (ret) {
2338 Serge 544
            drm_gem_object_unreference(&obj->base);
2344 Serge 545
            return ret;
2338 Serge 546
        }
547
548
 
4104 Serge 549
        if (ret)
550
        {
551
            i915_gem_object_unpin(obj);
552
            drm_gem_object_unreference(&obj->base);
553
            return ret;
554
        }
555
/* You don't need to worry about fragmentation issues.
2338 Serge 556
 * GTT space is continuous. I guarantee it.                           */
557
558
 
4104 Serge 559
                    CURSOR_WIDTH*CURSOR_HEIGHT*4, PG_SW);
2338 Serge 560
561
 
562
        {
563
            i915_gem_object_unpin(obj);
2344 Serge 564
            drm_gem_object_unreference(&obj->base);
565
            return -ENOMEM;
2338 Serge 566
        };
567
        cursor->cobj = obj;
568
    };
569
570
 
571
572
 
573
    {
574
        for(j = 0; j < 32; j++)
575
            *bits++ = *src++;
576
        for(j = 32; j < CURSOR_WIDTH; j++)
577
            *bits++ = 0;
578
    }
579
    for(i = 0; i < CURSOR_WIDTH*(CURSOR_HEIGHT-32); i++)
580
        *bits++ = 0;
581
582
 
3037 serge 583
584
 
2338 Serge 585
586
 
2340 Serge 587
2338 Serge 588
 
589
590
 
591
592
 
593
}
594
595
 
596
 
597
{
598
    struct drm_device *dev = crtc->dev;
599
    struct drm_i915_private *dev_priv = dev->dev_private;
600
    struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
601
    int pipe = intel_crtc->pipe;
602
    bool visible = base != 0;
603
604
 
605
        uint32_t cntl = I915_READ(CURCNTR(pipe));
606
        if (base) {
607
            cntl &= ~(CURSOR_MODE | MCURSOR_PIPE_SELECT);
608
            cntl |= CURSOR_MODE_64_ARGB_AX | MCURSOR_GAMMA_ENABLE;
609
            cntl |= pipe << 28; /* Connect to correct pipe */
610
        } else {
611
            cntl &= ~(CURSOR_MODE | MCURSOR_GAMMA_ENABLE);
612
            cntl |= CURSOR_MODE_DISABLE;
613
        }
614
        I915_WRITE(CURCNTR(pipe), cntl);
615
616
 
617
    }
618
    /* and commit changes on next vblank */
619
    I915_WRITE(CURBASE(pipe), base);
620
}
621
622
 
623
{
624
    struct drm_i915_private *dev_priv = os_display->ddev->dev_private;
625
    struct intel_crtc *intel_crtc = to_intel_crtc(os_display->crtc);
626
    u32 base, pos;
627
    bool visible;
628
629
 
630
631
 
632
    intel_crtc->cursor_y = y;
633
634
 
635
    y = y - cursor->hot_y;
636
637
 
638
 
639
640
 
641
    if (x >= os_display->width)
642
        base = 0;
643
644
 
645
        base = 0;
646
647
 
648
    {
649
        if (x + intel_crtc->cursor_width < 0)
650
            base = 0;
651
652
 
653
        x = -x;
654
    }
655
    pos |= x << CURSOR_X_SHIFT;
656
657
 
658
    {
659
        if (y + intel_crtc->cursor_height < 0)
660
            base = 0;
661
662
 
663
        y = -y;
664
    }
665
    pos |= y << CURSOR_Y_SHIFT;
666
667
 
668
    if (!visible && !intel_crtc->cursor_visible)
669
        return;
670
671
 
672
//    if (IS_845G(dev) || IS_I865G(dev))
673
//        i845_update_cursor(crtc, base);
674
//    else
675
        i9xx_update_cursor(os_display->crtc, base);
676
677
 
678
679
 
680
 
681
{
682
    struct drm_i915_private *dev_priv = os_display->ddev->dev_private;
683
    struct intel_crtc *intel_crtc = to_intel_crtc(os_display->crtc);
684
    cursor_t *old;
685
686
 
687
    os_display->cursor = cursor;
688
689
 
690
       intel_crtc->cursor_addr = i915_gem_obj_ggtt_offset(cursor->cobj);
4104 Serge 691
    else
2338 Serge 692
        intel_crtc->cursor_addr = (addr_t)cursor->cobj;
2352 Serge 693
2338 Serge 694
 
695
    intel_crtc->cursor_height = 32;
696
697
 
698
    return old;
699
};
700
701
 
4371 Serge 702
{
3263 Serge 703
    struct drm_i915_gem_object *obj = get_fb_obj();
4371 Serge 704
2340 Serge 705
 
4371 Serge 706
    fb->width  = os_display->width;
3263 Serge 707
    fb->height = os_display->height;
708
    fb->pitch  = obj->stride;
4371 Serge 709
    fb->tiling = obj->tiling_mode;
710
2340 Serge 711
 
3263 Serge 712
}
4371 Serge 713
3263 Serge 714
 
4371 Serge 715
 
3277 Serge 716
{
717
    int left;
718
    int top;
719
    int right;
720
    int bottom;
721
}rect_t;
722
3263 Serge 723
 
3277 Serge 724
 
725
726
 
727
{
728
    u32_t   addr;
729
730
 
731
    addr+= sizeof(display_t);            /*  shoot me  */
732
    return *(u32_t*)addr;
733
}
734
735
 
736
737
 
738
            struct drm_file *file)
739
{
740
    struct drm_i915_mask *mask = data;
741
    struct drm_gem_object *obj;
742
    static unsigned int mask_seqno[256];
743
    rect_t winrc;
744
    u32    slot;
745
    int    ret=0;
4371 Serge 746
3277 Serge 747
 
3480 Serge 748
     {
749
        printf("%s handle %d\n", __FUNCTION__, mask->handle);
750
        return 0;
751
     }
752
753
 
3277 Serge 754
    if (obj == NULL)
755
        return -ENOENT;
756
757
 
758
        drm_gem_object_unreference_unlocked(obj);
759
        return -EINVAL;
760
    }
761
762
 
763
    {
764
//        static warn_count;
3298 Serge 765
3277 Serge 766
 
3290 Serge 767
        mask->height   = winrc.bottom - winrc.top + 1;
768
        mask->bo_pitch = (mask->width+15) & ~15;
769
770
 
3298 Serge 771
        if(warn_count < 1)
3277 Serge 772
        {
773
            printf("left %d top %d right %d bottom %d\n",
774
                    winrc.left, winrc.top, winrc.right, winrc.bottom);
775
            printf("mask pitch %d data %p\n", mask->bo_pitch, mask->bo_size);
776
            warn_count++;
777
        };
778
#endif
3298 Serge 779
780
 
4104 Serge 781
3277 Serge 782
 
3290 Serge 783
 
3277 Serge 784
785
 
786
    {
787
        u8* src_offset;
788
        u8* dst_offset;
789
        u32 ifl;
790
791
 
792
        if (ret)
793
            goto err1;
4371 Serge 794
3277 Serge 795
 
796
        if(ret !=0 )
797
        {
798
            dbgprintf("%s: i915_gem_object_set_to_cpu_domain failed\n", __FUNCTION__);
4371 Serge 799
            goto err2;
800
        };
3277 Serge 801
802
 
803
804
 
805
806
 
807
 
808
        src_offset+= get_display_map();
809
        dst_offset = (u8*)mask->bo_map;
810
811
 
3290 Serge 812
3277 Serge 813
 
814
        {
815
            mask_seqno[slot] = os_display->mask_seqno;
816
817
 
818
819
 
820
                "movd       %[slot],   %%xmm6    \n"
821
            "punpckldq  %%xmm6, %%xmm6            \n"
822
            "punpcklqdq %%xmm6, %%xmm6            \n"
823
            :: [slot]  "m" (slot)
824
            :"xmm6");
825
826
 
827
            {
828
                int tmp_w = mask->bo_pitch;
829
830
 
831
                u8* tmp_dst = dst_offset;
832
833
 
834
                dst_offset+= mask->bo_pitch;
835
836
 
837
                {
838
                    __asm__ __volatile__ (
839
                    "movdqu     (%0),   %%xmm0            \n"
840
                    "movdqu   16(%0),   %%xmm1            \n"
841
                    "movdqu   32(%0),   %%xmm2            \n"
842
                    "movdqu   48(%0),   %%xmm3            \n"
843
                    "pcmpeqb    %%xmm6, %%xmm0            \n"
844
                    "pcmpeqb    %%xmm6, %%xmm1            \n"
845
                    "pcmpeqb    %%xmm6, %%xmm2            \n"
846
                    "pcmpeqb    %%xmm6, %%xmm3            \n"
847
                    "movdqa     %%xmm0,   (%%edi)         \n"
848
                    "movdqa     %%xmm1, 16(%%edi)         \n"
849
                    "movdqa     %%xmm2, 32(%%edi)         \n"
850
                    "movdqa     %%xmm3, 48(%%edi)         \n"
851
852
 
853
                    :"xmm0","xmm1","xmm2","xmm3");
854
                    tmp_w -= 64;
855
                    tmp_src += 64;
856
                    tmp_dst += 64;
857
                }
858
859
 
860
                {
861
                    __asm__ __volatile__ (
862
                    "movdqu     (%0),   %%xmm0            \n"
863
                    "movdqu   16(%0),   %%xmm1            \n"
864
                    "pcmpeqb    %%xmm6, %%xmm0            \n"
865
                    "pcmpeqb    %%xmm6, %%xmm1            \n"
866
                    "movdqa     %%xmm0,   (%%edi)         \n"
867
                    "movdqa     %%xmm1, 16(%%edi)         \n"
868
869
 
870
                    :"xmm0","xmm1");
871
                    tmp_w -= 32;
872
                    tmp_src += 32;
873
                    tmp_dst += 32;
874
                }
875
876
 
877
                {
878
                    __asm__ __volatile__ (
879
                    "movdqu     (%0),   %%xmm0            \n"
880
                    "pcmpeqb    %%xmm6, %%xmm0            \n"
881
                    "movdqa     %%xmm0,   (%%edi)         \n"
882
                    :: "r" (tmp_src), "D" (tmp_dst)
883
                    :"xmm0");
884
                    tmp_w -= 16;
885
                    tmp_src += 16;
886
                    tmp_dst += 16;
887
                }
888
            };
889
        };
890
        safe_sti(ifl);
891
4371 Serge 892
 
893
        if(ret != 0 )
894
        {
895
            dbgprintf("%s: i915_gem_object_set_to_gtt_domain failed\n", __FUNCTION__);
896
        };
897
    }
3277 Serge 898
899
 
4371 Serge 900
    mutex_unlock(&dev->struct_mutex);
901
err1:
902
    drm_gem_object_unreference(obj);
3277 Serge 903
904
 
4371 Serge 905
}
3277 Serge 906
907
 
908
 
909
 
2360 Serge 910
 
911
 
912
 
913
 
914
 
915
 
916
 
917
 
918
 
3031 serge 919
2360 Serge 920
 
3031 serge 921
{
922
    u32 tmp = GetTimerTicks();
923
2360 Serge 924
 
3031 serge 925
    ts->tv_nsec = (tmp - ts->tv_sec*100)*10000000;
926
}
927
2360 Serge 928
 
4104 Serge 929
{
3031 serge 930
    while (nsec >= NSEC_PER_SEC) {
4104 Serge 931
        /*
932
         * The following asm() prevents the compiler from
933
         * optimising this loop into a modulo operation. See
934
         * also __iter_div_u64_rem() in include/linux/time.h
935
         */
936
        asm("" : "+rm"(nsec));
937
        nsec -= NSEC_PER_SEC;
938
        ++sec;
939
    }
940
    while (nsec < 0) {
941
        asm("" : "+rm"(nsec));
942
        nsec += NSEC_PER_SEC;
943
        --sec;
944
    }
945
    ts->tv_sec = sec;
946
    ts->tv_nsec = nsec;
947
}
3031 serge 948
2360 Serge 949
 
3480 Serge 950
prepare_to_wait(wait_queue_head_t *q, wait_queue_t *wait, int state)
951
{
952
    unsigned long flags;
953
3031 serge 954
 
3480 Serge 955
    spin_lock_irqsave(&q->lock, flags);
956
    if (list_empty(&wait->task_list))
957
            __add_wait_queue(q, wait);
958
    spin_unlock_irqrestore(&q->lock, flags);
959
}
960
961
 
962
 * finish_wait - clean up after waiting in a queue
963
 * @q: waitqueue waited on
964
 * @wait: wait descriptor
965
 *
966
 * Sets current thread back to running state and removes
967
 * the wait descriptor from the given waitqueue if still
968
 * queued.
969
 */
970
void finish_wait(wait_queue_head_t *q, wait_queue_t *wait)
971
{
972
    unsigned long flags;
973
974
 
975
    /*
976
     * We can check for list emptiness outside the lock
977
     * IFF:
978
     *  - we use the "careful" check that verifies both
979
     *    the next and prev pointers, so that there cannot
980
     *    be any half-pending updates in progress on other
981
     *    CPU's that we haven't seen yet (and that might
982
     *    still change the stack area.
983
     * and
984
     *  - all other users take the lock (ie we can only
985
     *    have _one_ other CPU that looks at or modifies
986
     *    the list).
987
     */
988
    if (!list_empty_careful(&wait->task_list)) {
989
            spin_lock_irqsave(&q->lock, flags);
990
            list_del_init(&wait->task_list);
991
            spin_unlock_irqrestore(&q->lock, flags);
992
    }
993
994
 
995
}
996
997
 
998
{
999
    list_del_init(&wait->task_list);
1000
    return 1;
1001
}
1002
1003
 
3482 Serge 1004
{
1005
    unsigned int res = w - ((w >> 1) & 0x5555);
1006
    res = (res & 0x3333) + ((res >> 2) & 0x3333);
1007
    res = (res + (res >> 4)) & 0x0F0F;
1008
    return (res + (res >> 8)) & 0x00FF;
1009
}
1010
3480 Serge 1011
 
1012
 
3482 Serge 1013
{
1014
    unsigned long j0 = GetTimerTicks();
1015
3480 Serge 1016
 
3482 Serge 1017
    return round_jiffies_common(j + j0, true) - j0;
1018
}
1019
3480 Serge 1020
 
3482 Serge 1021