summaryrefslogtreecommitdiff
path: root/EdkCompatibilityPkg/Compatibility/BootScriptSaveOnS3SaveStateThunk/ScriptSave.c
blob: 7248e2e860c3aa9baa518bd9cc49c2d3d29224a4 (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
/** @file
  Implementation for S3 Boot Script Save thunk driver.
  This thunk driver consumes PI S3SaveState protocol to produce framework S3BootScriptSave Protocol 
  
  Copyright (c) 2010, Intel Corporation. All rights reserved.<BR>
  This program and the accompanying materials
  are licensed and made available under the terms and conditions of the BSD License
  which accompanies this distribution.  The full text of the license may be found at
  http://opensource.org/licenses/bsd-license.php

  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/
#include "ScriptSave.h"

EFI_HANDLE                    mHandle;
EFI_BOOT_SCRIPT_SAVE_PROTOCOL mS3ScriptSave = {
                                  BootScriptWrite,
                                  BootScriptCloseTable
                                 };
EFI_S3_SAVE_STATE_PROTOCOL    *mS3SaveState;

/**
  Wrapper for a thunk  to transition from long mode to compatibility mode to execute 32-bit code and then transit back to
  long mode.
  
  @param  Function     The 32bit code entry to be executed.
  @param  Param1       The first parameter to pass to 32bit code
  @param  Param2       The second parameter to pass to 32bit code
  @retval EFI_SUCCESS  Execute 32bit code successfully.
  @retval other        Something wrong when execute the 32bit code 
              
**/  
EFI_STATUS
Execute32BitCode (
  IN UINT64      Function,
  IN UINT64      Param1,
  IN UINT64      Param2
  );

/**
  A stub to convert framework boot script dispatch to PI boot script dispatch.
  
  @param  ImageHandle  It should be is NULL.
  @param  Context      The first parameter to pass to 32bit code

  @return dispatch value.
              
**/  
EFI_STATUS
EFIAPI
FrameworkBootScriptDispatchStub (
  IN EFI_HANDLE ImageHandle,
  IN VOID       *Context
  )
{
  EFI_STATUS                Status;
  DISPATCH_ENTRYPOINT_FUNC  EntryFunc;
  VOID                      *PeiServices;
  IA32_DESCRIPTOR           Idtr;

  DEBUG ((EFI_D_ERROR, "FrameworkBootScriptDispatchStub - 0x%08x\n", (UINTN)Context));

  EntryFunc = (DISPATCH_ENTRYPOINT_FUNC) (UINTN) (Context);
  AsmReadIdtr (&Idtr);
  PeiServices = (VOID *)(UINTN)(*(UINT32 *)(Idtr.Base - sizeof (UINT32)));

  //
  // ECP assumes first parameter is NULL, and second parameter is PeiServices.
  //
  Status = Execute32BitCode ((UINT64)(UINTN)EntryFunc, 0, (UINT64)(UINTN)PeiServices);

  return Status;
}

/**
  Internal function to add IO write opcode to the table.

  @param  Marker                The variable argument list to get the opcode
                                and associated attributes.

  @retval EFI_OUT_OF_RESOURCES  Not enough resource to do operation.
  @retval EFI_SUCCESS           Opcode is added.

**/
EFI_STATUS
BootScriptIoWrite (
  IN VA_LIST                       Marker
  )
{
  EFI_BOOT_SCRIPT_WIDTH Width;
  UINT64                Address;
  UINTN                 Count;
  UINT8                 *Buffer;

  Width       = VA_ARG (Marker, EFI_BOOT_SCRIPT_WIDTH);
  Address     = VA_ARG (Marker, UINT64);
  Count       = VA_ARG (Marker, UINTN);
  Buffer      = VA_ARG (Marker, UINT8 *);
  
  return mS3SaveState->Write (
                        mS3SaveState,
                        EFI_BOOT_SCRIPT_IO_WRITE_OPCODE,
                        Width, 
                        Address, 
                        Count, 
                        Buffer
                        );
}
/**
  Internal function to add IO read/write opcode to the table.

  @param  Marker                The variable argument list to get the opcode
                                and associated attributes.

  @retval EFI_OUT_OF_RESOURCES  Not enough resource to do operation.
  @retval EFI_SUCCESS           Opcode is added.

**/
EFI_STATUS
BootScriptIoReadWrite (
  IN VA_LIST                       Marker
  )
{
  EFI_BOOT_SCRIPT_WIDTH Width;
  UINT64                Address;
  UINT8                 *Data;
  UINT8                 *DataMask;
 
  Width       = VA_ARG (Marker, EFI_BOOT_SCRIPT_WIDTH);
  Address     = VA_ARG (Marker, UINT64);
  Data        = VA_ARG (Marker, UINT8 *);
  DataMask    = VA_ARG (Marker, UINT8 *);
  
   return mS3SaveState->Write (
                         mS3SaveState,
                         EFI_BOOT_SCRIPT_IO_READ_WRITE_OPCODE,
                         Width, 
                         Address, 
                         Data, 
                         DataMask
                         );
}

/**
  Internal function to add memory write opcode to the table.

  @param  Marker                The variable argument list to get the opcode
                                and associated attributes.

  @retval EFI_OUT_OF_RESOURCES  Not enough resource to do operation.
  @retval EFI_SUCCESS           Opcode is added.

**/
EFI_STATUS
BootScriptMemWrite (
  IN VA_LIST                       Marker
  )
{
  EFI_BOOT_SCRIPT_WIDTH Width;
  UINT64                Address;
  UINTN                 Count;
  UINT8                 *Buffer;
 
  Width       = VA_ARG (Marker, EFI_BOOT_SCRIPT_WIDTH);
  Address     = VA_ARG (Marker, UINT64);
  Count       = VA_ARG (Marker, UINTN);
  Buffer      = VA_ARG (Marker, UINT8 *);

  return mS3SaveState->Write (
                        mS3SaveState,
                        EFI_BOOT_SCRIPT_MEM_WRITE_OPCODE,
                        Width, 
                        Address, 
                        Count, 
                        Buffer
                        );
}

/**
  Internal function to add memory read/write opcode to the table.

  @param  Marker                The variable argument list to get the opcode
                                and associated attributes.

  @retval EFI_OUT_OF_RESOURCES  Not enough resource to do operation.
  @retval EFI_SUCCESS           Opcode is added.

**/
EFI_STATUS
BootScriptMemReadWrite (
  IN VA_LIST                       Marker
  )
{
  EFI_BOOT_SCRIPT_WIDTH Width;
  UINT64                Address;
  UINT8                 *Data;
  UINT8                 *DataMask;
  
  Width       = VA_ARG (Marker, EFI_BOOT_SCRIPT_WIDTH);
  Address     = VA_ARG (Marker, UINT64);
  Data        = VA_ARG (Marker, UINT8 *);
  DataMask    = VA_ARG (Marker, UINT8 *);

 return mS3SaveState->Write (
                        mS3SaveState,
                        EFI_BOOT_SCRIPT_MEM_READ_WRITE_OPCODE,
                        Width, 
                        Address, 
                        Data, 
                        DataMask
                        );
}

/**
  Internal function to add PciCfg write opcode to the table.

  @param  Marker                The variable argument list to get the opcode
                                and associated attributes.

  @retval EFI_OUT_OF_RESOURCES  Not enough resource to do operation.
  @retval EFI_SUCCESS           Opcode is added.

**/
EFI_STATUS
BootScriptPciCfgWrite (
  IN VA_LIST                       Marker
  )
{
  EFI_BOOT_SCRIPT_WIDTH Width;
  UINT64                Address;
  UINTN                 Count;
  UINT8                 *Buffer;

  Width       = VA_ARG (Marker, EFI_BOOT_SCRIPT_WIDTH);
  Address     = VA_ARG (Marker, UINT64);
  Count       = VA_ARG (Marker, UINTN);
  Buffer      = VA_ARG (Marker, UINT8 *);

  return mS3SaveState->Write (
                        mS3SaveState,
                        EFI_BOOT_SCRIPT_PCI_CONFIG_WRITE_OPCODE,
                        Width, 
                        Address, 
                        Count, 
                        Buffer
                        );
}

/**
  Internal function to PciCfg read/write opcode to the table.

  @param  Marker                The variable argument list to get the opcode
                                and associated attributes.

  @retval EFI_OUT_OF_RESOURCES  Not enough resource to do operation.
  @retval EFI_SUCCESS           Opcode is added.

**/
EFI_STATUS
BootScriptPciCfgReadWrite (
  IN VA_LIST                       Marker
  )
{
  EFI_BOOT_SCRIPT_WIDTH Width;
  UINT64                Address;
  UINT8                 *Data;
  UINT8                 *DataMask;

  Width       = VA_ARG (Marker, EFI_BOOT_SCRIPT_WIDTH);
  Address     = VA_ARG (Marker, UINT64);
  Data        = VA_ARG (Marker, UINT8 *);
  DataMask    = VA_ARG (Marker, UINT8 *);

  return mS3SaveState->Write (
                          mS3SaveState,
                          EFI_BOOT_SCRIPT_PCI_CONFIG_READ_WRITE_OPCODE,
                          Width,
                          Address,
                          Data,
                          DataMask
                         );
}
/**
  Internal function to add PciCfg2 write opcode to the table.

  @param  Marker                The variable argument list to get the opcode
                                and associated attributes.

  @retval EFI_OUT_OF_RESOURCES  Not enough resource to do operation.
  @retval EFI_SUCCESS           Opcode is added.

**/
EFI_STATUS
BootScriptPciCfg2Write (
  IN VA_LIST                       Marker
  )
{
  EFI_BOOT_SCRIPT_WIDTH Width;
  UINT64                Address;
  UINTN                 Count;
  UINT8                 *Buffer;
  UINT16                Segment;

  Width       = VA_ARG (Marker, EFI_BOOT_SCRIPT_WIDTH);
  Address     = VA_ARG (Marker, UINT64);
  Count       = VA_ARG (Marker, UINTN);
  Buffer      = VA_ARG (Marker, UINT8 *);
  Segment     = VA_ARG (Marker, UINT16);

  return mS3SaveState->Write (
                          mS3SaveState,
                          EFI_BOOT_SCRIPT_PCI_CONFIG2_WRITE_OPCODE,
                          Width, 
                          Segment, 
                          Address, 
                          Count, 
                          Buffer
                         );
}

/**
  Internal function to PciCfg2 read/write opcode to the table.

  @param  Marker                The variable argument list to get the opcode
                                and associated attributes.

  @retval EFI_OUT_OF_RESOURCES  Not enough resource to do operation.
  @retval EFI_SUCCESS           Opcode is added.

**/
EFI_STATUS
BootScriptPciCfg2ReadWrite (
  IN VA_LIST                       Marker
  )
{
  EFI_BOOT_SCRIPT_WIDTH Width;
  UINT16                Segment;
  UINT64                Address;
  UINT8                 *Data;
  UINT8                 *DataMask;
 
  Width       = VA_ARG (Marker, EFI_BOOT_SCRIPT_WIDTH);
  Address     = VA_ARG (Marker, UINT64);
  Segment     = VA_ARG (Marker, UINT16);
  Data        = VA_ARG (Marker, UINT8 *);
  DataMask    = VA_ARG (Marker, UINT8 *);
 
  return mS3SaveState->Write (
                          mS3SaveState,
                          EFI_BOOT_SCRIPT_PCI_CONFIG2_READ_WRITE_OPCODE,
                          Width, 
                          Segment,
                          Address,
                          Data,
                          DataMask
                          );
}
/**
  Internal function to add smbus excute opcode to the table.

  @param  Marker                The variable argument list to get the opcode
                                and associated attributes.

  @retval EFI_OUT_OF_RESOURCES  Not enough resource to do operation.
  @retval EFI_SUCCESS           Opcode is added.

**/
EFI_STATUS
BootScriptSmbusExecute (
  IN VA_LIST                       Marker
  )
{
  EFI_SMBUS_DEVICE_ADDRESS  SlaveAddress;
  EFI_SMBUS_DEVICE_COMMAND  Command;
  EFI_SMBUS_OPERATION       Operation;
  BOOLEAN                   PecCheck;
  VOID                     *Buffer;
  UINTN                    *DataSize;
  
  SlaveAddress.SmbusDeviceAddress = VA_ARG (Marker, UINTN);
  Command                         = VA_ARG (Marker, EFI_SMBUS_DEVICE_COMMAND);
  Operation                       = VA_ARG (Marker, EFI_SMBUS_OPERATION);
  PecCheck                        = VA_ARG (Marker, BOOLEAN);
  DataSize                        = VA_ARG (Marker, UINTN *);    
  Buffer                          = VA_ARG (Marker, VOID *);
 
  return mS3SaveState->Write (
                          mS3SaveState,
                          EFI_BOOT_SCRIPT_SMBUS_EXECUTE_OPCODE,
                          SlaveAddress,
                          Command, 
                          Operation, 
                          PecCheck,
                          DataSize, 
                          Buffer
                         );
}
/**
  Internal function to add stall opcode to the table.

  @param  Marker                The variable argument list to get the opcode
                                and associated attributes.

  @retval EFI_OUT_OF_RESOURCES  Not enough resource to do operation.
  @retval EFI_SUCCESS           Opcode is added.

**/
EFI_STATUS
BootScriptStall (
  IN VA_LIST                       Marker
  )
{
  UINT32                Duration;

  Duration    = VA_ARG (Marker, UINT32);

  return mS3SaveState->Write (
                          mS3SaveState,
                          EFI_BOOT_SCRIPT_STALL_OPCODE,
                          Duration
                         );
}

/**
  Internal function to add Save jmp address according to DISPATCH_OPCODE. 
  We ignore "Context" parameter

  @param  Marker                The variable argument list to get the opcode
                                and associated attributes.

  @retval EFI_OUT_OF_RESOURCES  Not enough resource to do operation.
  @retval EFI_SUCCESS           Opcode is added.

**/
EFI_STATUS
BootScriptDispatch (
  IN VA_LIST                       Marker
  )
{
  VOID        *EntryPoint;

  EntryPoint = (VOID*)(UINTN)VA_ARG (Marker, EFI_PHYSICAL_ADDRESS);
  return mS3SaveState->Write (
                          mS3SaveState,
                          EFI_BOOT_SCRIPT_DISPATCH_OPCODE,
                          EntryPoint
                         );
}

/**
  Internal function to add Save jmp address according to DISPATCH_OPCODE. 
  We ignore "Context" parameter.
  We need create thunk stub to convert PEI entrypoint (used in Framework version)
  to DXE entrypoint (defined in PI spec).

  @param  Marker                The variable argument list to get the opcode
                                and associated attributes.

  @retval EFI_OUT_OF_RESOURCES  Not enough resource to do operation.
  @retval EFI_SUCCESS           Opcode is added.

**/
EFI_STATUS
FrameworkBootScriptDispatch (
  IN VA_LIST                       Marker
  )
{
  VOID           *EntryPoint;
  VOID           *Context;

  EntryPoint = (VOID*)(UINTN)VA_ARG (Marker, EFI_PHYSICAL_ADDRESS);

  //
  // Register callback
  //
  Context    = EntryPoint;
  EntryPoint = (VOID *)(UINTN)FrameworkBootScriptDispatchStub;
  return mS3SaveState->Write (
                         mS3SaveState,
                         EFI_BOOT_SCRIPT_DISPATCH_2_OPCODE,
                         EntryPoint,
                         Context
                         );
}

/**
  Internal function to add memory pool operation to the table. 
 
  @param  Marker                The variable argument list to get the opcode
                                and associated attributes.

  @retval EFI_OUT_OF_RESOURCES  Not enough resource to do operation.
  @retval EFI_SUCCESS           Opcode is added.

**/
EFI_STATUS
BootScriptMemPoll (
  IN VA_LIST                       Marker
  )
{
  EFI_BOOT_SCRIPT_WIDTH Width;
  UINT64                Address;
  UINT8                 *BitMask;
  UINT8                 *BitValue;
  UINT64                Duration;
  UINT64                LoopTimes;
  UINT64                Delay;

  Width       = VA_ARG (Marker, EFI_BOOT_SCRIPT_WIDTH);
  Address     = VA_ARG (Marker, UINT64);
  BitMask     = VA_ARG (Marker, UINT8 *);
  BitValue    = VA_ARG (Marker, UINT8 *);
  Duration    = (UINT64)VA_ARG (Marker, UINT64);
  LoopTimes   = (UINT64)VA_ARG (Marker, UINT64);
  Delay       = MultU64x64 (DivU64x32(Duration, 100), LoopTimes);
  
  return mS3SaveState->Write (
                          mS3SaveState,
                          EFI_BOOT_SCRIPT_MEM_POLL_OPCODE,
                          Width, 
                          Address, 
                          BitMask, 
                          BitValue, 
                          Delay
                          );
}

/**
  Internal function to add Save jmp address according to DISPATCH_OPCODE2. 
  The "Context" parameter is not ignored.

  @param  Marker                The variable argument list to get the opcode
                                and associated attributes.

  @retval EFI_OUT_OF_RESOURCES  Not enough resource to do operation.
  @retval EFI_SUCCESS           Opcode is added.

**/
EFI_STATUS
BootScriptDispatch2 (
  IN VA_LIST                       Marker
  )
{
  VOID                  *EntryPoint;
  VOID                  *Context;  

  EntryPoint = (VOID*)(UINTN)VA_ARG (Marker, EFI_PHYSICAL_ADDRESS);
  Context    = (VOID*)(UINTN)VA_ARG (Marker, EFI_PHYSICAL_ADDRESS);

 return mS3SaveState->Write (
                          mS3SaveState,
                          EFI_BOOT_SCRIPT_DISPATCH_2_OPCODE,
                          EntryPoint, 
                          Context
                         );
}
/**
  Internal function to add the opcode link node to the link
  list.
  @param  Marker                The variable argument list to get the opcode
                                and associated attributes.

  @retval EFI_OUT_OF_RESOURCES  Not enought resource to complete the operations.
  @retval EFI_SUCCESS           The opcode entry is added to the link list
                                successfully.
**/
EFI_STATUS
BootScriptInformation (
  IN VA_LIST                       Marker
  )
{
  UINT32                InformationLength;
  EFI_PHYSICAL_ADDRESS  Information;  

  InformationLength = VA_ARG (Marker, UINT32);
  Information = VA_ARG (Marker, EFI_PHYSICAL_ADDRESS);
  
  return mS3SaveState->Write (
                          mS3SaveState,
                          EFI_BOOT_SCRIPT_INFORMATION_OPCODE,
                          InformationLength, 
                          (VOID*)(UINTN)Information
                         );
}

/**
  Adds a record into a specified Framework boot script table.

  This function is used to store a boot script record into a given boot
  script table. If the table specified by TableName is nonexistent in the 
  system, a new table will automatically be created and then the script record 
  will be added into the new table. A boot script table can add new script records
  until EFI_BOOT_SCRIPT_SAVE_PROTOCOL.CloseTable() is called. Currently, the only 
  meaningful table name is EFI_ACPI_S3_RESUME_SCRIPT_TABLE. This function is
  responsible for allocating necessary memory for the script.

  This function has a variable parameter list. The exact parameter list depends on 
  the OpCode that is passed into the function. If an unsupported OpCode or illegal 
  parameter list is passed in, this function returns EFI_INVALID_PARAMETER.
  If there are not enough resources available for storing more scripts, this function returns
  EFI_OUT_OF_RESOURCES.

  @param  This                  A pointer to the EFI_BOOT_SCRIPT_SAVE_PROTOCOL instance.
  @param  TableName             Name of the script table. Currently, the only meaningful value is
                                EFI_ACPI_S3_RESUME_SCRIPT_TABLE.
  @param  OpCode                The operation code (opcode) number.
  @param  ...                   Argument list that is specific to each opcode. 

  @retval EFI_SUCCESS           The operation succeeded. A record was added into the
                                specified script table.
  @retval EFI_INVALID_PARAMETER The parameter is illegal or the given boot script is not supported.
                                If the opcode is unknow or not supported because of the PCD 
                                Feature Flags.
  @retval EFI_OUT_OF_RESOURCES  There is insufficient memory to store the boot script.

**/
EFI_STATUS
EFIAPI
BootScriptWrite (
  IN EFI_BOOT_SCRIPT_SAVE_PROTOCOL    *This,
  IN UINT16                           TableName,
  IN UINT16                           OpCode,
  ...
  )
{
  EFI_STATUS                Status;
  VA_LIST                   Marker;
  
  if (TableName != FRAMEWORK_EFI_ACPI_S3_RESUME_SCRIPT_TABLE) {
    //
    // Only S3 boot script is supported for now
    //
    return EFI_OUT_OF_RESOURCES;
  }
  //
  // Build script according to opcode
  //
  switch (OpCode) {

  case EFI_BOOT_SCRIPT_IO_WRITE_OPCODE:
    VA_START (Marker, OpCode);
    Status = BootScriptIoWrite (Marker);
    VA_END (Marker);
    break;

  case EFI_BOOT_SCRIPT_IO_READ_WRITE_OPCODE:
    VA_START (Marker, OpCode);
    Status = BootScriptIoReadWrite (Marker);
    VA_END (Marker);
    break;

  case EFI_BOOT_SCRIPT_MEM_WRITE_OPCODE:
    VA_START (Marker, OpCode);
    Status = BootScriptMemWrite (Marker);
    VA_END (Marker); 
    break;

  case EFI_BOOT_SCRIPT_MEM_READ_WRITE_OPCODE:
    VA_START (Marker, OpCode);
    Status = BootScriptMemReadWrite (Marker);
    VA_END (Marker);
    break;

  case EFI_BOOT_SCRIPT_PCI_CONFIG_WRITE_OPCODE:
    VA_START (Marker, OpCode);
    Status = BootScriptPciCfgWrite (Marker);
    VA_END (Marker);
    break;

  case EFI_BOOT_SCRIPT_PCI_CONFIG_READ_WRITE_OPCODE:
    VA_START (Marker, OpCode);
    Status = BootScriptPciCfgReadWrite (Marker);
    VA_END (Marker);
    break;

  case EFI_BOOT_SCRIPT_SMBUS_EXECUTE_OPCODE:
    VA_START (Marker, OpCode);
    Status = BootScriptSmbusExecute (Marker);
    VA_END (Marker);
    break;

  case EFI_BOOT_SCRIPT_STALL_OPCODE:
    VA_START (Marker, OpCode);
    Status = BootScriptStall (Marker);
    VA_END (Marker);
  
    break;

  case EFI_BOOT_SCRIPT_DISPATCH_OPCODE:
    VA_START (Marker, OpCode);
    Status = FrameworkBootScriptDispatch (Marker);
    VA_END (Marker);
    break;

  case FRAMEWORK_EFI_BOOT_SCRIPT_DISPATCH_2_OPCODE:
    VA_START (Marker, OpCode);
    Status = BootScriptDispatch2 (Marker);
    VA_END (Marker);
    break;

  case EFI_BOOT_SCRIPT_INFORMATION_OPCODE:
    VA_START (Marker, OpCode);
    Status = BootScriptInformation (Marker);
    VA_END (Marker);
    break;

  case FRAMEWORK_EFI_BOOT_SCRIPT_MEM_POLL_OPCODE:
    VA_START (Marker, OpCode);
    Status = BootScriptMemPoll (Marker);
    VA_END (Marker);
    break;

  case EFI_BOOT_SCRIPT_PCI_CONFIG2_WRITE_OPCODE:
    VA_START (Marker, OpCode);
    Status = BootScriptPciCfg2Write (Marker);
    VA_END (Marker);
    break;

  case EFI_BOOT_SCRIPT_PCI_CONFIG2_READ_WRITE_OPCODE:
    VA_START (Marker, OpCode);
    Status = BootScriptPciCfg2ReadWrite (Marker);
    VA_END (Marker);
    break;

  default:
    Status = EFI_INVALID_PARAMETER;
    break;
  }

  return Status;
}

/**
  Closes the specified script table.

  This function closes the specified boot script table and returns the base address 
  of the table. It allocates a new pool to duplicate all the boot scripts in the specified 
  table. Once this function is called, the specified table will be destroyed after it is 
  copied into the allocated pool. As a result, any attempts to add a script record into a 
  closed table will cause a new table to be created. The base address of the allocated pool 
  will be returned in Address. After using the boot script table, the caller is responsible 
  for freeing the pool that is allocated by this function. If the boot script table,
  such as EFI_ACPI_S3_RESUME_SCRIPT_TABLE, is required to be stored in a nonperturbed
  memory region, the caller should copy the table into the nonperturbed memory region by itself.

  @param  This                  A pointer to the EFI_BOOT_SCRIPT_SAVE_PROTOCOL instance.
  @param  TableName             Name of the script table. Currently, the only meaningful value is
                                 EFI_ACPI_S3_RESUME_SCRIPT_TABLE.
  @param  Address               A pointer to the physical address where the table begins. 
                               
  @retval EFI_SUCCESS           The table was successfully returned.
  @retval EFI_NOT_FOUND         The specified table was not created previously.
  @retval EFI_OUT_OF_RESOURCE   Memory is insufficient to hold the reorganized boot script table.
  @retval EFI_UNSUPPORTED       the table type is not EFI_ACPI_S3_RESUME_SCRIPT_TABLE
  
**/
EFI_STATUS
EFIAPI
BootScriptCloseTable (
  IN EFI_BOOT_SCRIPT_SAVE_PROTOCOL    *This,
  IN UINT16                           TableName,
  OUT EFI_PHYSICAL_ADDRESS            *Address
  )
{ 
  if (TableName != FRAMEWORK_EFI_ACPI_S3_RESUME_SCRIPT_TABLE) {
    //
    // Only S3 boot script is supported for now
    //
    return EFI_NOT_FOUND;
  }
  //
  // Here the close table is not implemented. 
  //  
 
  return EFI_UNSUPPORTED;
}

/**
  This routine is entry point of ScriptSave driver.

  @param  ImageHandle           Handle for this drivers loaded image protocol.
  @param  SystemTable           EFI system table.

  @retval EFI_OUT_OF_RESOURCES  No enough resource
  @retval EFI_SUCCESS           Succesfully installed the ScriptSave driver.
  @retval other                 Errors occured.

**/
EFI_STATUS
EFIAPI
InitializeScriptSaveOnS3SaveState (
  IN EFI_HANDLE           ImageHandle,
  IN EFI_SYSTEM_TABLE     *SystemTable
  )
{
  UINT8                                         *Buffer;
  UINTN                                         BufferSize;
  PE_COFF_LOADER_IMAGE_CONTEXT                  ImageContext;
  BOOT_SCRIPT_THUNK_DATA                        *BootScriptThunkData;
  EFI_STATUS                                    Status;
  VOID                                          *DevicePath;
  EFI_PHYSICAL_ADDRESS                          MemoryAddress;
  UINTN                                         PageNumber;

  //
  // Test if the gEfiCallerIdGuid of this image is already installed. if not, the entry
  // point is loaded by DXE code which is the first time loaded. or else, it is already
  // be reloaded be itself.This is a work-around
  //
  Status = gBS->LocateProtocol (&gEfiCallerIdGuid, NULL, &DevicePath);
  if (EFI_ERROR (Status)) {
    //
    // This is the first-time loaded by DXE core. reload itself to NVS mem
    //
    //
    // A workarouond: Here we install a dummy handle
    //
    Status = gBS->InstallProtocolInterface (
                    &ImageHandle,
                    &gEfiCallerIdGuid,
                    EFI_NATIVE_INTERFACE,
                    DevicePath
                    );

    Status = GetSectionFromAnyFv  (
               &gEfiCallerIdGuid,
               EFI_SECTION_PE32,
               0,
               (VOID **) &Buffer,
               &BufferSize
               );
    ImageContext.Handle    = Buffer;
    ImageContext.ImageRead = PeCoffLoaderImageReadFromMemory;
    //
    // Get information about the image being loaded
    //
    Status = PeCoffLoaderGetImageInfo (&ImageContext);
    if (EFI_ERROR (Status)) {
      return Status;
    }

    MemoryAddress = SIZE_4GB - 1;
    PageNumber    = EFI_SIZE_TO_PAGES (BufferSize + ImageContext.SectionAlignment);
    Status  = gBS->AllocatePages (
                     AllocateMaxAddress,
                     EfiACPIMemoryNVS,
                     PageNumber,
                     &MemoryAddress
                     );
    if (EFI_ERROR (Status)) {
      return EFI_OUT_OF_RESOURCES;
    }
    ImageContext.ImageAddress = (PHYSICAL_ADDRESS)(UINTN)MemoryAddress;
    //
    // Align buffer on section boundry
    //
    ImageContext.ImageAddress += ImageContext.SectionAlignment - 1;
    ImageContext.ImageAddress &= ~(ImageContext.SectionAlignment - 1);
    //
    // Load the image to our new buffer
    //
    Status = PeCoffLoaderLoadImage (&ImageContext);
    if (EFI_ERROR (Status)) {
      gBS->FreePages (MemoryAddress, PageNumber);
      return Status;
    }

    //
    // Relocate the image in our new buffer
    //
    Status = PeCoffLoaderRelocateImage (&ImageContext);

    if (EFI_ERROR (Status)) {
      PeCoffLoaderUnloadImage (&ImageContext);
      gBS->FreePages (MemoryAddress, PageNumber);
      return Status;
    }
    //
    // Flush the instruction cache so the image data is written before we execute it
    //
    InvalidateInstructionCacheRange ((VOID *)(UINTN)ImageContext.ImageAddress, (UINTN)ImageContext.ImageSize);
    Status = ((EFI_IMAGE_ENTRY_POINT)(UINTN)(ImageContext.EntryPoint)) ((EFI_HANDLE)(UINTN)(ImageContext.ImageAddress), SystemTable);
    if (EFI_ERROR (Status)) {
      gBS->FreePages (MemoryAddress, PageNumber);
      return Status;
    }
    //
    // Additional step for BootScriptThunk integrity
    //

    //
    // Allocate BootScriptThunkData
    //
    BootScriptThunkData = AllocatePool (sizeof (BOOT_SCRIPT_THUNK_DATA));
    if (BootScriptThunkData == NULL) {
      return EFI_OUT_OF_RESOURCES;
    }

    BootScriptThunkData->BootScriptThunkBase   = ImageContext.ImageAddress;
    BootScriptThunkData->BootScriptThunkLength = ImageContext.ImageSize;
    //
    // Set BootScriptThunkData
    //
    PcdSet64 (BootScriptThunkDataPtr, (UINT64)(UINTN)BootScriptThunkData); 
    return EFI_SUCCESS;
  } else {
    //
    // the entry point is invoked after reloading. following code only run in  ACPI NVS
    //

    //
    // Locate and cache PI S3 Save State Protocol.
    //
    Status = gBS->LocateProtocol (
                    &gEfiS3SaveStateProtocolGuid, 
                    NULL, 
                    (VOID **) &mS3SaveState
                    );
    ASSERT_EFI_ERROR (Status);

    return gBS->InstallProtocolInterface (
                  &mHandle,
                  &gEfiBootScriptSaveProtocolGuid,
                  EFI_NATIVE_INTERFACE,
                  &mS3ScriptSave
                  );
  }
}