aboutsummaryrefslogtreecommitdiff
path: root/hw/sm501.c
blob: 1ed0a7e30908721f59d47f9f1225fc93e4bd70d4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
/*
 * QEMU SM501 Device
 *
 * Copyright (c) 2008 Shin-ichiro KAWASAKI
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include <stdio.h>
#include "hw.h"
#include "pc.h"
#include "console.h"
#include "devices.h"
#include "sysbus.h"
#include "qdev-addr.h"
#include "range.h"

/*
 * Status: 2010/05/07
 *   - Minimum implementation for Linux console : mmio regs and CRT layer.
 *   - 2D grapihcs acceleration partially supported : only fill rectangle.
 *
 * TODO:
 *   - Panel support
 *   - Touch panel support
 *   - USB support
 *   - UART support
 *   - More 2D graphics engine support
 *   - Performance tuning
 */

//#define DEBUG_SM501
//#define DEBUG_BITBLT

#ifdef DEBUG_SM501
#define SM501_DPRINTF(fmt, ...) printf(fmt, ## __VA_ARGS__)
#else
#define SM501_DPRINTF(fmt, ...) do {} while(0)
#endif


#define MMIO_BASE_OFFSET 0x3e00000

/* SM501 register definitions taken from "linux/include/linux/sm501-regs.h" */

/* System Configuration area */
/* System config base */
#define SM501_SYS_CONFIG		(0x000000)

/* config 1 */
#define SM501_SYSTEM_CONTROL 		(0x000000)

#define SM501_SYSCTRL_PANEL_TRISTATE	(1<<0)
#define SM501_SYSCTRL_MEM_TRISTATE	(1<<1)
#define SM501_SYSCTRL_CRT_TRISTATE	(1<<2)

#define SM501_SYSCTRL_PCI_SLAVE_BURST_MASK (3<<4)
#define SM501_SYSCTRL_PCI_SLAVE_BURST_1	(0<<4)
#define SM501_SYSCTRL_PCI_SLAVE_BURST_2	(1<<4)
#define SM501_SYSCTRL_PCI_SLAVE_BURST_4	(2<<4)
#define SM501_SYSCTRL_PCI_SLAVE_BURST_8	(3<<4)

#define SM501_SYSCTRL_PCI_CLOCK_RUN_EN	(1<<6)
#define SM501_SYSCTRL_PCI_RETRY_DISABLE	(1<<7)
#define SM501_SYSCTRL_PCI_SUBSYS_LOCK	(1<<11)
#define SM501_SYSCTRL_PCI_BURST_READ_EN	(1<<15)

/* miscellaneous control */

#define SM501_MISC_CONTROL		(0x000004)

#define SM501_MISC_BUS_SH		(0x0)
#define SM501_MISC_BUS_PCI		(0x1)
#define SM501_MISC_BUS_XSCALE		(0x2)
#define SM501_MISC_BUS_NEC		(0x6)
#define SM501_MISC_BUS_MASK		(0x7)

#define SM501_MISC_VR_62MB		(1<<3)
#define SM501_MISC_CDR_RESET		(1<<7)
#define SM501_MISC_USB_LB		(1<<8)
#define SM501_MISC_USB_SLAVE		(1<<9)
#define SM501_MISC_BL_1			(1<<10)
#define SM501_MISC_MC			(1<<11)
#define SM501_MISC_DAC_POWER		(1<<12)
#define SM501_MISC_IRQ_INVERT		(1<<16)
#define SM501_MISC_SH			(1<<17)

#define SM501_MISC_HOLD_EMPTY		(0<<18)
#define SM501_MISC_HOLD_8		(1<<18)
#define SM501_MISC_HOLD_16		(2<<18)
#define SM501_MISC_HOLD_24		(3<<18)
#define SM501_MISC_HOLD_32		(4<<18)
#define SM501_MISC_HOLD_MASK		(7<<18)

#define SM501_MISC_FREQ_12		(1<<24)
#define SM501_MISC_PNL_24BIT		(1<<25)
#define SM501_MISC_8051_LE		(1<<26)



#define SM501_GPIO31_0_CONTROL		(0x000008)
#define SM501_GPIO63_32_CONTROL		(0x00000C)
#define SM501_DRAM_CONTROL		(0x000010)

/* command list */
#define SM501_ARBTRTN_CONTROL		(0x000014)

/* command list */
#define SM501_COMMAND_LIST_STATUS	(0x000024)

/* interrupt debug */
#define SM501_RAW_IRQ_STATUS		(0x000028)
#define SM501_RAW_IRQ_CLEAR		(0x000028)
#define SM501_IRQ_STATUS		(0x00002C)
#define SM501_IRQ_MASK			(0x000030)
#define SM501_DEBUG_CONTROL		(0x000034)

/* power management */
#define SM501_POWERMODE_P2X_SRC		(1<<29)
#define SM501_POWERMODE_V2X_SRC		(1<<20)
#define SM501_POWERMODE_M_SRC		(1<<12)
#define SM501_POWERMODE_M1_SRC		(1<<4)

#define SM501_CURRENT_GATE		(0x000038)
#define SM501_CURRENT_CLOCK		(0x00003C)
#define SM501_POWER_MODE_0_GATE		(0x000040)
#define SM501_POWER_MODE_0_CLOCK	(0x000044)
#define SM501_POWER_MODE_1_GATE		(0x000048)
#define SM501_POWER_MODE_1_CLOCK	(0x00004C)
#define SM501_SLEEP_MODE_GATE		(0x000050)
#define SM501_POWER_MODE_CONTROL	(0x000054)

/* power gates for units within the 501 */
#define SM501_GATE_HOST			(0)
#define SM501_GATE_MEMORY		(1)
#define SM501_GATE_DISPLAY		(2)
#define SM501_GATE_2D_ENGINE		(3)
#define SM501_GATE_CSC			(4)
#define SM501_GATE_ZVPORT		(5)
#define SM501_GATE_GPIO			(6)
#define SM501_GATE_UART0		(7)
#define SM501_GATE_UART1		(8)
#define SM501_GATE_SSP			(10)
#define SM501_GATE_USB_HOST		(11)
#define SM501_GATE_USB_GADGET		(12)
#define SM501_GATE_UCONTROLLER		(17)
#define SM501_GATE_AC97			(18)

/* panel clock */
#define SM501_CLOCK_P2XCLK		(24)
/* crt clock */
#define SM501_CLOCK_V2XCLK		(16)
/* main clock */
#define SM501_CLOCK_MCLK		(8)
/* SDRAM controller clock */
#define SM501_CLOCK_M1XCLK		(0)

/* config 2 */
#define SM501_PCI_MASTER_BASE		(0x000058)
#define SM501_ENDIAN_CONTROL		(0x00005C)
#define SM501_DEVICEID			(0x000060)
/* 0x050100A0 */

#define SM501_DEVICEID_SM501		(0x05010000)
#define SM501_DEVICEID_IDMASK		(0xffff0000)
#define SM501_DEVICEID_REVMASK		(0x000000ff)

#define SM501_PLLCLOCK_COUNT		(0x000064)
#define SM501_MISC_TIMING		(0x000068)
#define SM501_CURRENT_SDRAM_CLOCK	(0x00006C)

#define SM501_PROGRAMMABLE_PLL_CONTROL	(0x000074)

/* GPIO base */
#define SM501_GPIO			(0x010000)
#define SM501_GPIO_DATA_LOW		(0x00)
#define SM501_GPIO_DATA_HIGH		(0x04)
#define SM501_GPIO_DDR_LOW		(0x08)
#define SM501_GPIO_DDR_HIGH		(0x0C)
#define SM501_GPIO_IRQ_SETUP		(0x10)
#define SM501_GPIO_IRQ_STATUS		(0x14)
#define SM501_GPIO_IRQ_RESET		(0x14)

/* I2C controller base */
#define SM501_I2C			(0x010040)
#define SM501_I2C_BYTE_COUNT		(0x00)
#define SM501_I2C_CONTROL		(0x01)
#define SM501_I2C_STATUS		(0x02)
#define SM501_I2C_RESET			(0x02)
#define SM501_I2C_SLAVE_ADDRESS		(0x03)
#define SM501_I2C_DATA			(0x04)

/* SSP base */
#define SM501_SSP			(0x020000)

/* Uart 0 base */
#define SM501_UART0			(0x030000)

/* Uart 1 base */
#define SM501_UART1			(0x030020)

/* USB host port base */
#define SM501_USB_HOST			(0x040000)

/* USB slave/gadget base */
#define SM501_USB_GADGET		(0x060000)

/* USB slave/gadget data port base */
#define SM501_USB_GADGET_DATA		(0x070000)

/* Display controller/video engine base */
#define SM501_DC			(0x080000)

/* common defines for the SM501 address registers */
#define SM501_ADDR_FLIP			(1<<31)
#define SM501_ADDR_EXT			(1<<27)
#define SM501_ADDR_CS1			(1<<26)
#define SM501_ADDR_MASK			(0x3f << 26)

#define SM501_FIFO_MASK			(0x3 << 16)
#define SM501_FIFO_1			(0x0 << 16)
#define SM501_FIFO_3			(0x1 << 16)
#define SM501_FIFO_7			(0x2 << 16)
#define SM501_FIFO_11			(0x3 << 16)

/* common registers for panel and the crt */
#define SM501_OFF_DC_H_TOT		(0x000)
#define SM501_OFF_DC_V_TOT		(0x008)
#define SM501_OFF_DC_H_SYNC		(0x004)
#define SM501_OFF_DC_V_SYNC		(0x00C)

#define SM501_DC_PANEL_CONTROL		(0x000)

#define SM501_DC_PANEL_CONTROL_FPEN	(1<<27)
#define SM501_DC_PANEL_CONTROL_BIAS	(1<<26)
#define SM501_DC_PANEL_CONTROL_DATA	(1<<25)
#define SM501_DC_PANEL_CONTROL_VDD	(1<<24)
#define SM501_DC_PANEL_CONTROL_DP	(1<<23)

#define SM501_DC_PANEL_CONTROL_TFT_888	(0<<21)
#define SM501_DC_PANEL_CONTROL_TFT_333	(1<<21)
#define SM501_DC_PANEL_CONTROL_TFT_444	(2<<21)

#define SM501_DC_PANEL_CONTROL_DE	(1<<20)

#define SM501_DC_PANEL_CONTROL_LCD_TFT	(0<<18)
#define SM501_DC_PANEL_CONTROL_LCD_STN8	(1<<18)
#define SM501_DC_PANEL_CONTROL_LCD_STN12 (2<<18)

#define SM501_DC_PANEL_CONTROL_CP	(1<<14)
#define SM501_DC_PANEL_CONTROL_VSP	(1<<13)
#define SM501_DC_PANEL_CONTROL_HSP	(1<<12)
#define SM501_DC_PANEL_CONTROL_CK	(1<<9)
#define SM501_DC_PANEL_CONTROL_TE	(1<<8)
#define SM501_DC_PANEL_CONTROL_VPD	(1<<7)
#define SM501_DC_PANEL_CONTROL_VP	(1<<6)
#define SM501_DC_PANEL_CONTROL_HPD	(1<<5)
#define SM501_DC_PANEL_CONTROL_HP	(1<<4)
#define SM501_DC_PANEL_CONTROL_GAMMA	(1<<3)
#define SM501_DC_PANEL_CONTROL_EN	(1<<2)

#define SM501_DC_PANEL_CONTROL_8BPP	(0<<0)
#define SM501_DC_PANEL_CONTROL_16BPP	(1<<0)
#define SM501_DC_PANEL_CONTROL_32BPP	(2<<0)


#define SM501_DC_PANEL_PANNING_CONTROL	(0x004)
#define SM501_DC_PANEL_COLOR_KEY	(0x008)
#define SM501_DC_PANEL_FB_ADDR		(0x00C)
#define SM501_DC_PANEL_FB_OFFSET	(0x010)
#define SM501_DC_PANEL_FB_WIDTH		(0x014)
#define SM501_DC_PANEL_FB_HEIGHT	(0x018)
#define SM501_DC_PANEL_TL_LOC		(0x01C)
#define SM501_DC_PANEL_BR_LOC		(0x020)
#define SM501_DC_PANEL_H_TOT		(0x024)
#define SM501_DC_PANEL_H_SYNC		(0x028)
#define SM501_DC_PANEL_V_TOT		(0x02C)
#define SM501_DC_PANEL_V_SYNC		(0x030)
#define SM501_DC_PANEL_CUR_LINE		(0x034)

#define SM501_DC_VIDEO_CONTROL		(0x040)
#define SM501_DC_VIDEO_FB0_ADDR		(0x044)
#define SM501_DC_VIDEO_FB_WIDTH		(0x048)
#define SM501_DC_VIDEO_FB0_LAST_ADDR	(0x04C)
#define SM501_DC_VIDEO_TL_LOC		(0x050)
#define SM501_DC_VIDEO_BR_LOC		(0x054)
#define SM501_DC_VIDEO_SCALE		(0x058)
#define SM501_DC_VIDEO_INIT_SCALE	(0x05C)
#define SM501_DC_VIDEO_YUV_CONSTANTS	(0x060)
#define SM501_DC_VIDEO_FB1_ADDR		(0x064)
#define SM501_DC_VIDEO_FB1_LAST_ADDR	(0x068)

#define SM501_DC_VIDEO_ALPHA_CONTROL	(0x080)
#define SM501_DC_VIDEO_ALPHA_FB_ADDR	(0x084)
#define SM501_DC_VIDEO_ALPHA_FB_OFFSET	(0x088)
#define SM501_DC_VIDEO_ALPHA_FB_LAST_ADDR	(0x08C)
#define SM501_DC_VIDEO_ALPHA_TL_LOC	(0x090)
#define SM501_DC_VIDEO_ALPHA_BR_LOC	(0x094)
#define SM501_DC_VIDEO_ALPHA_SCALE	(0x098)
#define SM501_DC_VIDEO_ALPHA_INIT_SCALE	(0x09C)
#define SM501_DC_VIDEO_ALPHA_CHROMA_KEY	(0x0A0)
#define SM501_DC_VIDEO_ALPHA_COLOR_LOOKUP	(0x0A4)

#define SM501_DC_PANEL_HWC_BASE		(0x0F0)
#define SM501_DC_PANEL_HWC_ADDR		(0x0F0)
#define SM501_DC_PANEL_HWC_LOC		(0x0F4)
#define SM501_DC_PANEL_HWC_COLOR_1_2	(0x0F8)
#define SM501_DC_PANEL_HWC_COLOR_3	(0x0FC)

#define SM501_HWC_EN			(1<<31)

#define SM501_OFF_HWC_ADDR		(0x00)
#define SM501_OFF_HWC_LOC		(0x04)
#define SM501_OFF_HWC_COLOR_1_2		(0x08)
#define SM501_OFF_HWC_COLOR_3		(0x0C)

#define SM501_DC_ALPHA_CONTROL		(0x100)
#define SM501_DC_ALPHA_FB_ADDR		(0x104)
#define SM501_DC_ALPHA_FB_OFFSET	(0x108)
#define SM501_DC_ALPHA_TL_LOC		(0x10C)
#define SM501_DC_ALPHA_BR_LOC		(0x110)
#define SM501_DC_ALPHA_CHROMA_KEY	(0x114)
#define SM501_DC_ALPHA_COLOR_LOOKUP	(0x118)

#define SM501_DC_CRT_CONTROL		(0x200)

#define SM501_DC_CRT_CONTROL_TVP	(1<<15)
#define SM501_DC_CRT_CONTROL_CP		(1<<14)
#define SM501_DC_CRT_CONTROL_VSP	(1<<13)
#define SM501_DC_CRT_CONTROL_HSP	(1<<12)
#define SM501_DC_CRT_CONTROL_VS		(1<<11)
#define SM501_DC_CRT_CONTROL_BLANK	(1<<10)
#define SM501_DC_CRT_CONTROL_SEL	(1<<9)
#define SM501_DC_CRT_CONTROL_TE		(1<<8)
#define SM501_DC_CRT_CONTROL_PIXEL_MASK (0xF << 4)
#define SM501_DC_CRT_CONTROL_GAMMA	(1<<3)
#define SM501_DC_CRT_CONTROL_ENABLE	(1<<2)

#define SM501_DC_CRT_CONTROL_8BPP	(0<<0)
#define SM501_DC_CRT_CONTROL_16BPP	(1<<0)
#define SM501_DC_CRT_CONTROL_32BPP	(2<<0)

#define SM501_DC_CRT_FB_ADDR		(0x204)
#define SM501_DC_CRT_FB_OFFSET		(0x208)
#define SM501_DC_CRT_H_TOT		(0x20C)
#define SM501_DC_CRT_H_SYNC		(0x210)
#define SM501_DC_CRT_V_TOT		(0x214)
#define SM501_DC_CRT_V_SYNC		(0x218)
#define SM501_DC_CRT_SIGNATURE_ANALYZER	(0x21C)
#define SM501_DC_CRT_CUR_LINE		(0x220)
#define SM501_DC_CRT_MONITOR_DETECT	(0x224)

#define SM501_DC_CRT_HWC_BASE		(0x230)
#define SM501_DC_CRT_HWC_ADDR		(0x230)
#define SM501_DC_CRT_HWC_LOC		(0x234)
#define SM501_DC_CRT_HWC_COLOR_1_2	(0x238)
#define SM501_DC_CRT_HWC_COLOR_3	(0x23C)

#define SM501_DC_PANEL_PALETTE		(0x400)

#define SM501_DC_VIDEO_PALETTE		(0x800)

#define SM501_DC_CRT_PALETTE		(0xC00)

/* Zoom Video port base */
#define SM501_ZVPORT			(0x090000)

/* AC97/I2S base */
#define SM501_AC97			(0x0A0000)

/* 8051 micro controller base */
#define SM501_UCONTROLLER		(0x0B0000)

/* 8051 micro controller SRAM base */
#define SM501_UCONTROLLER_SRAM		(0x0C0000)

/* DMA base */
#define SM501_DMA			(0x0D0000)

/* 2d engine base */
#define SM501_2D_ENGINE			(0x100000)
#define SM501_2D_SOURCE			(0x00)
#define SM501_2D_DESTINATION		(0x04)
#define SM501_2D_DIMENSION		(0x08)
#define SM501_2D_CONTROL		(0x0C)
#define SM501_2D_PITCH			(0x10)
#define SM501_2D_FOREGROUND		(0x14)
#define SM501_2D_BACKGROUND		(0x18)
#define SM501_2D_STRETCH		(0x1C)
#define SM501_2D_COLOR_COMPARE		(0x20)
#define SM501_2D_COLOR_COMPARE_MASK 	(0x24)
#define SM501_2D_MASK			(0x28)
#define SM501_2D_CLIP_TL		(0x2C)
#define SM501_2D_CLIP_BR		(0x30)
#define SM501_2D_MONO_PATTERN_LOW	(0x34)
#define SM501_2D_MONO_PATTERN_HIGH	(0x38)
#define SM501_2D_WINDOW_WIDTH		(0x3C)
#define SM501_2D_SOURCE_BASE		(0x40)
#define SM501_2D_DESTINATION_BASE	(0x44)
#define SM501_2D_ALPHA			(0x48)
#define SM501_2D_WRAP			(0x4C)
#define SM501_2D_STATUS			(0x50)

#define SM501_CSC_Y_SOURCE_BASE		(0xC8)
#define SM501_CSC_CONSTANTS		(0xCC)
#define SM501_CSC_Y_SOURCE_X		(0xD0)
#define SM501_CSC_Y_SOURCE_Y		(0xD4)
#define SM501_CSC_U_SOURCE_BASE		(0xD8)
#define SM501_CSC_V_SOURCE_BASE		(0xDC)
#define SM501_CSC_SOURCE_DIMENSION	(0xE0)
#define SM501_CSC_SOURCE_PITCH		(0xE4)
#define SM501_CSC_DESTINATION		(0xE8)
#define SM501_CSC_DESTINATION_DIMENSION	(0xEC)
#define SM501_CSC_DESTINATION_PITCH	(0xF0)
#define SM501_CSC_SCALE_FACTOR		(0xF4)
#define SM501_CSC_DESTINATION_BASE	(0xF8)
#define SM501_CSC_CONTROL		(0xFC)

/* 2d engine data port base */
#define SM501_2D_ENGINE_DATA		(0x110000)

/* end of register definitions */

#define SM501_HWC_WIDTH                       (64)
#define SM501_HWC_HEIGHT                      (64)

/* SM501 local memory size taken from "linux/drivers/mfd/sm501.c" */
static const uint32_t sm501_mem_local_size[] = {
	[0]	= 4*1024*1024,
	[1]	= 8*1024*1024,
	[2]	= 16*1024*1024,
	[3]	= 32*1024*1024,
	[4]	= 64*1024*1024,
	[5]	= 2*1024*1024,
};
#define get_local_mem_size(s) sm501_mem_local_size[(s)->local_mem_size_index]

typedef struct SM501State {
    /* graphic console status */
    DisplayState *ds;

    /* status & internal resources */
    target_phys_addr_t base;
    uint32_t local_mem_size_index;
    uint8_t * local_mem;
    ram_addr_t local_mem_offset;
    uint32_t last_width;
    uint32_t last_height;

    /* mmio registers */
    uint32_t system_control;
    uint32_t misc_control;
    uint32_t gpio_31_0_control;
    uint32_t gpio_63_32_control;
    uint32_t dram_control;
    uint32_t irq_mask;
    uint32_t misc_timing;
    uint32_t power_mode_control;

    uint32_t uart0_ier;
    uint32_t uart0_lcr;
    uint32_t uart0_mcr;
    uint32_t uart0_scr;

    uint8_t dc_palette[0x400 * 3];

    uint32_t dc_panel_control;
    uint32_t dc_panel_panning_control;
    uint32_t dc_panel_fb_addr;
    uint32_t dc_panel_fb_offset;
    uint32_t dc_panel_fb_width;
    uint32_t dc_panel_fb_height;
    uint32_t dc_panel_tl_location;
    uint32_t dc_panel_br_location;
    uint32_t dc_panel_h_total;
    uint32_t dc_panel_h_sync;
    uint32_t dc_panel_v_total;
    uint32_t dc_panel_v_sync;

    uint32_t dc_panel_hwc_addr;
    uint32_t dc_panel_hwc_location;
    uint32_t dc_panel_hwc_color_1_2;
    uint32_t dc_panel_hwc_color_3;

    uint32_t dc_crt_control;
    uint32_t dc_crt_fb_addr;
    uint32_t dc_crt_fb_offset;
    uint32_t dc_crt_h_total;
    uint32_t dc_crt_h_sync;
    uint32_t dc_crt_v_total;
    uint32_t dc_crt_v_sync;

    uint32_t dc_crt_hwc_addr;
    uint32_t dc_crt_hwc_location;
    uint32_t dc_crt_hwc_color_1_2;
    uint32_t dc_crt_hwc_color_3;

    uint32_t twoD_source;
    uint32_t twoD_destination;
    uint32_t twoD_dimension;
    uint32_t twoD_control;
    uint32_t twoD_pitch;
    uint32_t twoD_foreground;
    uint32_t twoD_stretch;
    uint32_t twoD_color_compare_mask;
    uint32_t twoD_mask;
    uint32_t twoD_window_width;
    uint32_t twoD_source_base;
    uint32_t twoD_destination_base;

} SM501State;

static uint32_t get_local_mem_size_index(uint32_t size)
{
    uint32_t norm_size = 0;
    int i, index = 0;

    for (i = 0; i < ARRAY_SIZE(sm501_mem_local_size); i++) {
	uint32_t new_size = sm501_mem_local_size[i];
	if (new_size >= size) {
	    if (norm_size == 0 || norm_size > new_size) {
		norm_size = new_size;
		index = i;
	    }
	}
    }

    return index;
}

/**
 * Check the availability of hardware cursor.
 * @param crt  0 for PANEL, 1 for CRT.
 */
static inline int is_hwc_enabled(SM501State *state, int crt)
{
    uint32_t addr = crt ? state->dc_crt_hwc_addr : state->dc_panel_hwc_addr;
    return addr & 0x80000000;
}

/**
 * Get the address which holds cursor pattern data.
 * @param crt  0 for PANEL, 1 for CRT.
 */
static inline uint32_t get_hwc_address(SM501State *state, int crt)
{
    uint32_t addr = crt ? state->dc_crt_hwc_addr : state->dc_panel_hwc_addr;
    return (addr & 0x03FFFFF0)/* >> 4*/;
}

/**
 * Get the cursor position in y coordinate.
 * @param crt  0 for PANEL, 1 for CRT.
 */
static inline uint32_t get_hwc_y(SM501State *state, int crt)
{
    uint32_t location = crt ? state->dc_crt_hwc_location
                            : state->dc_panel_hwc_location;
    return (location & 0x07FF0000) >> 16;
}

/**
 * Get the cursor position in x coordinate.
 * @param crt  0 for PANEL, 1 for CRT.
 */
static inline uint32_t get_hwc_x(SM501State *state, int crt)
{
    uint32_t location = crt ? state->dc_crt_hwc_location
                            : state->dc_panel_hwc_location;
    return location & 0x000007FF;
}

/**
 * Get the cursor position in x coordinate.
 * @param crt  0 for PANEL, 1 for CRT.
 * @param index  0, 1, 2 or 3 which specifies color of corsor dot.
 */
static inline uint16_t get_hwc_color(SM501State *state, int crt, int index)
{
    uint16_t color_reg = 0;
    uint16_t color_565 = 0;

    if (index == 0) {
        return 0;
    }

    switch (index) {
    case 1:
    case 2:
        color_reg = crt ? state->dc_crt_hwc_color_1_2
                        : state->dc_panel_hwc_color_1_2;
        break;
    case 3:
        color_reg = crt ? state->dc_crt_hwc_color_3
                        : state->dc_panel_hwc_color_3;
        break;
    default:
        printf("invalid hw cursor color.\n");
        abort();
    }

    switch (index) {
    case 1:
    case 3:
        color_565 = (uint16_t)(color_reg & 0xFFFF);
        break;
    case 2:
        color_565 = (uint16_t)((color_reg >> 16) & 0xFFFF);
        break;
    }
    return color_565;
}

static int within_hwc_y_range(SM501State *state, int y, int crt)
{
    int hwc_y = get_hwc_y(state, crt);
    return (hwc_y <= y && y < hwc_y + SM501_HWC_HEIGHT);
}

static void sm501_2d_operation(SM501State * s)
{
    /* obtain operation parameters */
    int operation = (s->twoD_control >> 16) & 0x1f;
    int rtl = s->twoD_control & 0x8000000;
    int src_x = (s->twoD_source >> 16) & 0x01FFF;
    int src_y = s->twoD_source & 0xFFFF;
    int dst_x = (s->twoD_destination >> 16) & 0x01FFF;
    int dst_y = s->twoD_destination & 0xFFFF;
    int operation_width = (s->twoD_dimension >> 16) & 0x1FFF;
    int operation_height = s->twoD_dimension & 0xFFFF;
    uint32_t color = s->twoD_foreground;
    int format_flags = (s->twoD_stretch >> 20) & 0x3;
    int addressing = (s->twoD_stretch >> 16) & 0xF;

    /* get frame buffer info */
    uint8_t * src = s->local_mem + (s->twoD_source_base & 0x03FFFFFF);
    uint8_t * dst = s->local_mem + (s->twoD_destination_base & 0x03FFFFFF);
    int src_width = (s->dc_crt_h_total & 0x00000FFF) + 1;
    int dst_width = (s->dc_crt_h_total & 0x00000FFF) + 1;

    if (addressing != 0x0) {
        printf("%s: only XY addressing is supported.\n", __func__);
        abort();
    }

    if ((s->twoD_source_base & 0x08000000) ||
        (s->twoD_destination_base & 0x08000000)) {
        printf("%s: only local memory is supported.\n", __func__);
        abort();
    }

    switch (operation) {
    case 0x00: /* copy area */
#define COPY_AREA(_bpp, _pixel_type, rtl) {                                 \
        int y, x, index_d, index_s;                                         \
        for (y = 0; y < operation_height; y++) {                            \
            for (x = 0; x < operation_width; x++) {                         \
                if (rtl) {                                                  \
                    index_s = ((src_y - y) * src_width + src_x - x) * _bpp; \
                    index_d = ((dst_y - y) * dst_width + dst_x - x) * _bpp; \
                } else {                                                    \
                    index_s = ((src_y + y) * src_width + src_x + x) * _bpp; \
                    index_d = ((dst_y + y) * dst_width + dst_x + x) * _bpp; \
                }                                                           \
                *(_pixel_type*)&dst[index_d] = *(_pixel_type*)&src[index_s];\
            }                                                               \
        }                                                                   \
    }
        switch (format_flags) {
        case 0:
            COPY_AREA(1, uint8_t, rtl);
            break;
        case 1:
            COPY_AREA(2, uint16_t, rtl);
            break;
        case 2:
            COPY_AREA(4, uint32_t, rtl);
            break;
        }
        break;

    case 0x01: /* fill rectangle */
#define FILL_RECT(_bpp, _pixel_type) {                                      \
        int y, x;                                                           \
        for (y = 0; y < operation_height; y++) {                            \
            for (x = 0; x < operation_width; x++) {                         \
                int index = ((dst_y + y) * dst_width + dst_x + x) * _bpp;   \
                *(_pixel_type*)&dst[index] = (_pixel_type)color;            \
            }                                                               \
        }                                                                   \
    }

        switch (format_flags) {
        case 0:
            FILL_RECT(1, uint8_t);
            break;
        case 1:
            FILL_RECT(2, uint16_t);
            break;
        case 2:
            FILL_RECT(4, uint32_t);
            break;
        }
        break;

    default:
        printf("non-implemented SM501 2D operation. %d\n", operation);
        abort();
        break;
    }
}

static uint32_t sm501_system_config_read(void *opaque, target_phys_addr_t addr)
{
    SM501State * s = (SM501State *)opaque;
    uint32_t ret = 0;
    SM501_DPRINTF("sm501 system config regs : read addr=%x\n", (int)addr);

    switch(addr) {
    case SM501_SYSTEM_CONTROL:
	ret = s->system_control;
	break;
    case SM501_MISC_CONTROL:
	ret = s->misc_control;
	break;
    case SM501_GPIO31_0_CONTROL:
	ret = s->gpio_31_0_control;
	break;
    case SM501_GPIO63_32_CONTROL:
	ret = s->gpio_63_32_control;
	break;
    case SM501_DEVICEID:
	ret = 0x050100A0;
	break;
    case SM501_DRAM_CONTROL:
	ret = (s->dram_control & 0x07F107C0) | s->local_mem_size_index << 13;
	break;
    case SM501_IRQ_MASK:
	ret = s->irq_mask;
	break;
    case SM501_MISC_TIMING:
	/* TODO : simulate gate control */
	ret = s->misc_timing;
	break;
    case SM501_CURRENT_GATE:
	/* TODO : simulate gate control */
	ret = 0x00021807;
	break;
    case SM501_CURRENT_CLOCK:
	ret = 0x2A1A0A09;
	break;
    case SM501_POWER_MODE_CONTROL:
	ret = s->power_mode_control;
	break;

    default:
	printf("sm501 system config : not implemented register read."
	       " addr=%x\n", (int)addr);
        abort();
    }

    return ret;
}

static void sm501_system_config_write(void *opaque,
				      target_phys_addr_t addr, uint32_t value)
{
    SM501State * s = (SM501State *)opaque;
    SM501_DPRINTF("sm501 system config regs : write addr=%x, val=%x\n",
		  addr, value);

    switch(addr) {
    case SM501_SYSTEM_CONTROL:
	s->system_control = value & 0xE300B8F7;
	break;
    case SM501_MISC_CONTROL:
	s->misc_control = value & 0xFF7FFF20;
	break;
    case SM501_GPIO31_0_CONTROL:
	s->gpio_31_0_control = value;
	break;
    case SM501_GPIO63_32_CONTROL:
	s->gpio_63_32_control = value;
	break;
    case SM501_DRAM_CONTROL:
	s->local_mem_size_index = (value >> 13) & 0x7;
	/* rODO : check validity of size change */
	s->dram_control |=  value & 0x7FFFFFC3;
	break;
    case SM501_IRQ_MASK:
	s->irq_mask = value;
	break;
    case SM501_MISC_TIMING:
	s->misc_timing = value & 0xF31F1FFF;
	break;
    case SM501_POWER_MODE_0_GATE:
    case SM501_POWER_MODE_1_GATE:
    case SM501_POWER_MODE_0_CLOCK:
    case SM501_POWER_MODE_1_CLOCK:
	/* TODO : simulate gate & clock control */
	break;
    case SM501_POWER_MODE_CONTROL:
	s->power_mode_control = value & 0x00000003;
	break;

    default:
	printf("sm501 system config : not implemented register write."
	       " addr=%x, val=%x\n", (int)addr, value);
        abort();
    }
}

static CPUReadMemoryFunc * const sm501_system_config_readfn[] = {
    NULL,
    NULL,
    &sm501_system_config_read,
};

static CPUWriteMemoryFunc * const sm501_system_config_writefn[] = {
    NULL,
    NULL,
    &sm501_system_config_write,
};

static uint32_t sm501_palette_read(void *opaque, target_phys_addr_t addr)
{
    SM501State * s = (SM501State *)opaque;
    SM501_DPRINTF("sm501 palette read addr=%x\n", (int)addr);

    /* TODO : consider BYTE/WORD access */
    /* TODO : consider endian */

    assert(range_covers_byte(0, 0x400 * 3, addr));
    return *(uint32_t*)&s->dc_palette[addr];
}

static void sm501_palette_write(void *opaque,
				target_phys_addr_t addr, uint32_t value)
{
    SM501State * s = (SM501State *)opaque;
    SM501_DPRINTF("sm501 palette write addr=%x, val=%x\n",
		  (int)addr, value);

    /* TODO : consider BYTE/WORD access */
    /* TODO : consider endian */

    assert(range_covers_byte(0, 0x400 * 3, addr));
    *(uint32_t*)&s->dc_palette[addr] = value;
}

static uint32_t sm501_disp_ctrl_read(void *opaque, target_phys_addr_t addr)
{
    SM501State * s = (SM501State *)opaque;
    uint32_t ret = 0;
    SM501_DPRINTF("sm501 disp ctrl regs : read addr=%x\n", (int)addr);

    switch(addr) {

    case SM501_DC_PANEL_CONTROL:
	ret = s->dc_panel_control;
	break;
    case SM501_DC_PANEL_PANNING_CONTROL:
	ret = s->dc_panel_panning_control;
	break;
    case SM501_DC_PANEL_FB_ADDR:
	ret = s->dc_panel_fb_addr;
	break;
    case SM501_DC_PANEL_FB_OFFSET:
	ret = s->dc_panel_fb_offset;
	break;
    case SM501_DC_PANEL_FB_WIDTH:
	ret = s->dc_panel_fb_width;
	break;
    case SM501_DC_PANEL_FB_HEIGHT:
	ret = s->dc_panel_fb_height;
	break;
    case SM501_DC_PANEL_TL_LOC:
	ret = s->dc_panel_tl_location;
	break;
    case SM501_DC_PANEL_BR_LOC:
	ret = s->dc_panel_br_location;
	break;

    case SM501_DC_PANEL_H_TOT:
	ret = s->dc_panel_h_total;
	break;
    case SM501_DC_PANEL_H_SYNC:
	ret = s->dc_panel_h_sync;
	break;
    case SM501_DC_PANEL_V_TOT:
	ret = s->dc_panel_v_total;
	break;
    case SM501_DC_PANEL_V_SYNC:
	ret = s->dc_panel_v_sync;
	break;

    case SM501_DC_CRT_CONTROL:
	ret = s->dc_crt_control;
	break;
    case SM501_DC_CRT_FB_ADDR:
	ret = s->dc_crt_fb_addr;
	break;
    case SM501_DC_CRT_FB_OFFSET:
	ret = s->dc_crt_fb_offset;
	break;
    case SM501_DC_CRT_H_TOT:
	ret = s->dc_crt_h_total;
	break;
    case SM501_DC_CRT_H_SYNC:
	ret = s->dc_crt_h_sync;
	break;
    case SM501_DC_CRT_V_TOT:
	ret = s->dc_crt_v_total;
	break;
    case SM501_DC_CRT_V_SYNC:
	ret = s->dc_crt_v_sync;
	break;

    case SM501_DC_CRT_HWC_ADDR:
	ret = s->dc_crt_hwc_addr;
	break;
    case SM501_DC_CRT_HWC_LOC:
	ret = s->dc_crt_hwc_location;
	break;
    case SM501_DC_CRT_HWC_COLOR_1_2:
	ret = s->dc_crt_hwc_color_1_2;
	break;
    case SM501_DC_CRT_HWC_COLOR_3:
	ret = s->dc_crt_hwc_color_3;
	break;

    case SM501_DC_PANEL_PALETTE ... SM501_DC_PANEL_PALETTE + 0x400*3 - 4:
        ret = sm501_palette_read(opaque, addr - SM501_DC_PANEL_PALETTE);
        break;

    default:
	printf("sm501 disp ctrl : not implemented register read."
	       " addr=%x\n", (int)addr);
        abort();
    }

    return ret;
}

static void sm501_disp_ctrl_write(void *opaque,
					   target_phys_addr_t addr,
					   uint32_t value)
{
    SM501State * s = (SM501State *)opaque;
    SM501_DPRINTF("sm501 disp ctrl regs : write addr=%x, val=%x\n",
		  addr, value);

    switch(addr) {
    case SM501_DC_PANEL_CONTROL:
	s->dc_panel_control = value & 0x0FFF73FF;
	break;
    case SM501_DC_PANEL_PANNING_CONTROL:
	s->dc_panel_panning_control = value & 0xFF3FFF3F;
	break;
    case SM501_DC_PANEL_FB_ADDR:
	s->dc_panel_fb_addr = value & 0x8FFFFFF0;
	break;
    case SM501_DC_PANEL_FB_OFFSET:
	s->dc_panel_fb_offset = value & 0x3FF03FF0;
	break;
    case SM501_DC_PANEL_FB_WIDTH:
	s->dc_panel_fb_width = value & 0x0FFF0FFF;
	break;
    case SM501_DC_PANEL_FB_HEIGHT:
	s->dc_panel_fb_height = value & 0x0FFF0FFF;
	break;
    case SM501_DC_PANEL_TL_LOC:
	s->dc_panel_tl_location = value & 0x07FF07FF;
	break;
    case SM501_DC_PANEL_BR_LOC:
	s->dc_panel_br_location = value & 0x07FF07FF;
	break;

    case SM501_DC_PANEL_H_TOT:
	s->dc_panel_h_total = value & 0x0FFF0FFF;
	break;
    case SM501_DC_PANEL_H_SYNC:
	s->dc_panel_h_sync = value & 0x00FF0FFF;
	break;
    case SM501_DC_PANEL_V_TOT:
	s->dc_panel_v_total = value & 0x0FFF0FFF;
	break;
    case SM501_DC_PANEL_V_SYNC:
	s->dc_panel_v_sync = value & 0x003F0FFF;
	break;

    case SM501_DC_PANEL_HWC_ADDR:
	s->dc_panel_hwc_addr = value & 0x8FFFFFF0;
	break;
    case SM501_DC_PANEL_HWC_LOC:
	s->dc_panel_hwc_location = value & 0x0FFF0FFF;
	break;
    case SM501_DC_PANEL_HWC_COLOR_1_2:
	s->dc_panel_hwc_color_1_2 = value;
	break;
    case SM501_DC_PANEL_HWC_COLOR_3:
	s->dc_panel_hwc_color_3 = value & 0x0000FFFF;
	break;

    case SM501_DC_CRT_CONTROL:
	s->dc_crt_control = value & 0x0003FFFF;
	break;
    case SM501_DC_CRT_FB_ADDR:
	s->dc_crt_fb_addr = value & 0x8FFFFFF0;
	break;
    case SM501_DC_CRT_FB_OFFSET:
	s->dc_crt_fb_offset = value & 0x3FF03FF0;
	break;
    case SM501_DC_CRT_H_TOT:
	s->dc_crt_h_total = value & 0x0FFF0FFF;
	break;
    case SM501_DC_CRT_H_SYNC:
	s->dc_crt_h_sync = value & 0x00FF0FFF;
	break;
    case SM501_DC_CRT_V_TOT:
	s->dc_crt_v_total = value & 0x0FFF0FFF;
	break;
    case SM501_DC_CRT_V_SYNC:
	s->dc_crt_v_sync = value & 0x003F0FFF;
	break;

    case SM501_DC_CRT_HWC_ADDR:
	s->dc_crt_hwc_addr = value & 0x8FFFFFF0;
	break;
    case SM501_DC_CRT_HWC_LOC:
	s->dc_crt_hwc_location = value & 0x0FFF0FFF;
	break;
    case SM501_DC_CRT_HWC_COLOR_1_2:
	s->dc_crt_hwc_color_1_2 = value;
	break;
    case SM501_DC_CRT_HWC_COLOR_3:
	s->dc_crt_hwc_color_3 = value & 0x0000FFFF;
	break;

    case SM501_DC_PANEL_PALETTE ... SM501_DC_PANEL_PALETTE + 0x400*3 - 4:
        sm501_palette_write(opaque, addr - SM501_DC_PANEL_PALETTE, value);
        break;

    default:
	printf("sm501 disp ctrl : not implemented register write."
	       " addr=%x, val=%x\n", (int)addr, value);
        abort();
    }
}

static CPUReadMemoryFunc * const sm501_disp_ctrl_readfn[] = {
    NULL,
    NULL,
    &sm501_disp_ctrl_read,
};

static CPUWriteMemoryFunc * const sm501_disp_ctrl_writefn[] = {
    NULL,
    NULL,
    &sm501_disp_ctrl_write,
};

static uint32_t sm501_2d_engine_read(void *opaque, target_phys_addr_t addr)
{
    SM501State * s = (SM501State *)opaque;
    uint32_t ret = 0;
    SM501_DPRINTF("sm501 2d engine regs : read addr=%x\n", (int)addr);

    switch(addr) {
    case SM501_2D_SOURCE_BASE:
        ret = s->twoD_source_base;
        break;
    default:
        printf("sm501 disp ctrl : not implemented register read."
               " addr=%x\n", (int)addr);
        abort();
    }

    return ret;
}

static void sm501_2d_engine_write(void *opaque,
                                  target_phys_addr_t addr, uint32_t value)
{
    SM501State * s = (SM501State *)opaque;
    SM501_DPRINTF("sm501 2d engine regs : write addr=%x, val=%x\n",
                  addr, value);

    switch(addr) {
    case SM501_2D_SOURCE:
        s->twoD_source = value;
        break;
    case SM501_2D_DESTINATION:
        s->twoD_destination = value;
        break;
    case SM501_2D_DIMENSION:
        s->twoD_dimension = value;
        break;
    case SM501_2D_CONTROL:
        s->twoD_control = value;

        /* do 2d operation if start flag is set. */
        if (value & 0x80000000) {
            sm501_2d_operation(s);
            s->twoD_control &= ~0x80000000; /* start flag down */
        }

        break;
    case SM501_2D_PITCH:
        s->twoD_pitch = value;
        break;
    case SM501_2D_FOREGROUND:
        s->twoD_foreground = value;
        break;
    case SM501_2D_STRETCH:
        s->twoD_stretch = value;
        break;
    case SM501_2D_COLOR_COMPARE_MASK:
        s->twoD_color_compare_mask = value;
        break;
    case SM501_2D_MASK:
        s->twoD_mask = value;
        break;
    case SM501_2D_WINDOW_WIDTH:
        s->twoD_window_width = value;
        break;
    case SM501_2D_SOURCE_BASE:
        s->twoD_source_base = value;
        break;
    case SM501_2D_DESTINATION_BASE:
        s->twoD_destination_base = value;
        break;
    default:
        printf("sm501 2d engine : not implemented register write."
               " addr=%x, val=%x\n", (int)addr, value);
        abort();
    }
}

static CPUReadMemoryFunc * const sm501_2d_engine_readfn[] = {
    NULL,
    NULL,
    &sm501_2d_engine_read,
};

static CPUWriteMemoryFunc * const sm501_2d_engine_writefn[] = {
    NULL,
    NULL,
    &sm501_2d_engine_write,
};

/* draw line functions for all console modes */

#include "pixel_ops.h"

typedef void draw_line_func(uint8_t *d, const uint8_t *s,
			    int width, const uint32_t *pal);

typedef void draw_hwc_line_func(SM501State * s, int crt, uint8_t * palette,
                                int c_y, uint8_t *d, int width);

#define DEPTH 8
#include "sm501_template.h"

#define DEPTH 15
#include "sm501_template.h"

#define BGR_FORMAT
#define DEPTH 15
#include "sm501_template.h"

#define DEPTH 16
#include "sm501_template.h"

#define BGR_FORMAT
#define DEPTH 16
#include "sm501_template.h"

#define DEPTH 32
#include "sm501_template.h"

#define BGR_FORMAT
#define DEPTH 32
#include "sm501_template.h"

static draw_line_func * draw_line8_funcs[] = {
    draw_line8_8,
    draw_line8_15,
    draw_line8_16,
    draw_line8_32,
    draw_line8_32bgr,
    draw_line8_15bgr,
    draw_line8_16bgr,
};

static draw_line_func * draw_line16_funcs[] = {
    draw_line16_8,
    draw_line16_15,
    draw_line16_16,
    draw_line16_32,
    draw_line16_32bgr,
    draw_line16_15bgr,
    draw_line16_16bgr,
};

static draw_line_func * draw_line32_funcs[] = {
    draw_line32_8,
    draw_line32_15,
    draw_line32_16,
    draw_line32_32,
    draw_line32_32bgr,
    draw_line32_15bgr,
    draw_line32_16bgr,
};

static draw_hwc_line_func * draw_hwc_line_funcs[] = {
    draw_hwc_line_8,
    draw_hwc_line_15,
    draw_hwc_line_16,
    draw_hwc_line_32,
    draw_hwc_line_32bgr,
    draw_hwc_line_15bgr,
    draw_hwc_line_16bgr,
};

static inline int get_depth_index(DisplayState *s)
{
    switch(ds_get_bits_per_pixel(s)) {
    default:
    case 8:
	return 0;
    case 15:
        return 1;
    case 16:
        return 2;
    case 32:
	if (is_surface_bgr(s->surface))
	    return 4;
	else
	    return 3;
    }
}

static void sm501_draw_crt(SM501State * s)
{
    int y;
    int width = (s->dc_crt_h_total & 0x00000FFF) + 1;
    int height = (s->dc_crt_v_total & 0x00000FFF) + 1;

    uint8_t  * src = s->local_mem;
    int src_bpp = 0;
    int dst_bpp = ds_get_bytes_per_pixel(s->ds) + (ds_get_bits_per_pixel(s->ds) % 8 ? 1 : 0);
    uint32_t * palette = (uint32_t *)&s->dc_palette[SM501_DC_CRT_PALETTE
						    - SM501_DC_PANEL_PALETTE];
    uint8_t hwc_palette[3 * 3];
    int ds_depth_index = get_depth_index(s->ds);
    draw_line_func * draw_line = NULL;
    draw_hwc_line_func * draw_hwc_line = NULL;
    int full_update = 0;
    int y_start = -1;
    ram_addr_t page_min = ~0l;
    ram_addr_t page_max = 0l;
    ram_addr_t offset = s->local_mem_offset;

    /* choose draw_line function */
    switch (s->dc_crt_control & 3) {
    case SM501_DC_CRT_CONTROL_8BPP:
	src_bpp = 1;
	draw_line = draw_line8_funcs[ds_depth_index];
	break;
    case SM501_DC_CRT_CONTROL_16BPP:
	src_bpp = 2;
	draw_line = draw_line16_funcs[ds_depth_index];
	break;
    case SM501_DC_CRT_CONTROL_32BPP:
	src_bpp = 4;
	draw_line = draw_line32_funcs[ds_depth_index];
	break;
    default:
	printf("sm501 draw crt : invalid DC_CRT_CONTROL=%x.\n",
	       s->dc_crt_control);
        abort();
	break;
    }

    /* set up to draw hardware cursor */
    if (is_hwc_enabled(s, 1)) {
        int i;

        /* get cursor palette */
        for (i = 0; i < 3; i++) {
            uint16_t rgb565 = get_hwc_color(s, 1, i + 1);
            hwc_palette[i * 3 + 0] = (rgb565 & 0xf800) >> 8; /* red */
            hwc_palette[i * 3 + 1] = (rgb565 & 0x07e0) >> 3; /* green */
            hwc_palette[i * 3 + 2] = (rgb565 & 0x001f) << 3; /* blue */
        }

        /* choose cursor draw line function */
        draw_hwc_line = draw_hwc_line_funcs[ds_depth_index];
    }

    /* adjust console size */
    if (s->last_width != width || s->last_height != height) {
	qemu_console_resize(s->ds, width, height);
	s->last_width = width;
	s->last_height = height;
	full_update = 1;
    }

    /* draw each line according to conditions */
    for (y = 0; y < height; y++) {
	int update_hwc = draw_hwc_line ? within_hwc_y_range(s, y, 1) : 0;
	int update = full_update || update_hwc;
	ram_addr_t page0 = offset & TARGET_PAGE_MASK;
	ram_addr_t page1 = (offset + width * src_bpp - 1) & TARGET_PAGE_MASK;
	ram_addr_t page;

	/* check dirty flags for each line */
	for (page = page0; page <= page1; page += TARGET_PAGE_SIZE)
	    if (cpu_physical_memory_get_dirty(page, VGA_DIRTY_FLAG))
		update = 1;

	/* draw line and change status */
	if (update) {
            uint8_t * d = &(ds_get_data(s->ds)[y * width * dst_bpp]);

            /* draw graphics layer */
            draw_line(d, src, width, palette);

            /* draw haredware cursor */
            if (update_hwc) {
                draw_hwc_line(s, 1, hwc_palette, y - get_hwc_y(s, 1), d, width);
            }

	    if (y_start < 0)
		y_start = y;
	    if (page0 < page_min)
		page_min = page0;
	    if (page1 > page_max)
		page_max = page1;
	} else {
	    if (y_start >= 0) {
		/* flush to display */
		dpy_update(s->ds, 0, y_start, width, y - y_start);
		y_start = -1;
	    }
	}

	src += width * src_bpp;
	offset += width * src_bpp;
    }

    /* complete flush to display */
    if (y_start >= 0)
	dpy_update(s->ds, 0, y_start, width, y - y_start);

    /* clear dirty flags */
    if (page_min != ~0l) {
	cpu_physical_memory_reset_dirty(page_min, page_max + TARGET_PAGE_SIZE,
					VGA_DIRTY_FLAG);
    }
}

static void sm501_update_display(void *opaque)
{
    SM501State * s = (SM501State *)opaque;

    if (s->dc_crt_control & SM501_DC_CRT_CONTROL_ENABLE)
	sm501_draw_crt(s);
}

void sm501_init(uint32_t base, uint32_t local_mem_bytes, qemu_irq irq,
                CharDriverState *chr)
{
    SM501State * s;
    DeviceState *dev;
    int sm501_system_config_index;
    int sm501_disp_ctrl_index;
    int sm501_2d_engine_index;

    /* allocate management data region */
    s = (SM501State *)g_malloc0(sizeof(SM501State));
    s->base = base;
    s->local_mem_size_index
	= get_local_mem_size_index(local_mem_bytes);
    SM501_DPRINTF("local mem size=%x. index=%d\n", get_local_mem_size(s),
		  s->local_mem_size_index);
    s->system_control = 0x00100000;
    s->misc_control = 0x00001000; /* assumes SH, active=low */
    s->dc_panel_control = 0x00010000;
    s->dc_crt_control = 0x00010000;

    /* allocate local memory */
    s->local_mem_offset = qemu_ram_alloc(NULL, "sm501.local", local_mem_bytes);
    s->local_mem = qemu_get_ram_ptr(s->local_mem_offset);
    cpu_register_physical_memory(base, local_mem_bytes, s->local_mem_offset);

    /* map mmio */
    sm501_system_config_index
	= cpu_register_io_memory(sm501_system_config_readfn,
				 sm501_system_config_writefn, s,
                                 DEVICE_NATIVE_ENDIAN);
    cpu_register_physical_memory(base + MMIO_BASE_OFFSET,
				 0x6c, sm501_system_config_index);
    sm501_disp_ctrl_index = cpu_register_io_memory(sm501_disp_ctrl_readfn,
						   sm501_disp_ctrl_writefn, s,
                                                   DEVICE_NATIVE_ENDIAN);
    cpu_register_physical_memory(base + MMIO_BASE_OFFSET + SM501_DC,
                                 0x1000, sm501_disp_ctrl_index);
    sm501_2d_engine_index = cpu_register_io_memory(sm501_2d_engine_readfn,
                                                   sm501_2d_engine_writefn, s,
                                                   DEVICE_NATIVE_ENDIAN);
    cpu_register_physical_memory(base + MMIO_BASE_OFFSET + SM501_2D_ENGINE,
                                 0x54, sm501_2d_engine_index);

    /* bridge to usb host emulation module */
    dev = qdev_create(NULL, "sysbus-ohci");
    qdev_prop_set_uint32(dev, "num-ports", 2);
    qdev_prop_set_taddr(dev, "dma-offset", base);
    qdev_init_nofail(dev);
    sysbus_mmio_map(sysbus_from_qdev(dev), 0,
                    base + MMIO_BASE_OFFSET + SM501_USB_HOST);
    sysbus_connect_irq(sysbus_from_qdev(dev), 0, irq);

    /* bridge to serial emulation module */
    if (chr) {
#ifdef TARGET_WORDS_BIGENDIAN
        serial_mm_init(base + MMIO_BASE_OFFSET + SM501_UART0, 2,
                       NULL, /* TODO : chain irq to IRL */
                       115200, chr, 1, 1);
#else
        serial_mm_init(base + MMIO_BASE_OFFSET + SM501_UART0, 2,
                       NULL, /* TODO : chain irq to IRL */
                       115200, chr, 1, 0);
#endif
    }

    /* create qemu graphic console */
    s->ds = graphic_console_init(sm501_update_display, NULL,
				 NULL, NULL, s);
}