aboutsummaryrefslogtreecommitdiff
path: root/AT91SAM7S256/Source/c_loader.c
blob: d6ee342dcdfbd7a205f4d3170c096cedb9cc45ae (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
//
// Date init       14.12.2004
//
// Revision date   $Date:: 12-03-08 15:28                                    $
//
// Filename        $Workfile:: c_loader.c                                    $
//
// Version         $Revision:: 5                                             $
//
// Archive         $Archive:: /LMS2006/Sys01/Main_V02/Firmware/Source/c_load $
//
// Platform        C
//

#include  "stdconst.h"
#include  "modules.h"
#include  "c_loader.iom"
#include  "c_ioctrl.iom"
#include  "d_loader.h"
#include  "c_loader.h"
#include <string.h>

static    IOMAPLOADER   IOMapLoader;
static    VARSLOADER    VarsLoader;
static    HEADER        **pHeaders;

const     HEADER        cLoader =
{
  0x00090001L,
  "Loader",
  cLoaderInit,
  cLoaderCtrl,
  cLoaderExit,
  (void *)&IOMapLoader,
  (void *)&VarsLoader,
  (UWORD)sizeof(IOMapLoader),
  (UWORD)sizeof(VarsLoader),
  0x0000                      //Code size - not used so far
};

UWORD     cLoaderFileRq(UBYTE Cmd, UBYTE *pFileName, UBYTE *pBuffer, ULONG *pLength);
UWORD     cLoaderGetIoMapInfo(ULONG ModuleId, UBYTE *pIoMap, UWORD *pIoMapSize);
UWORD     cLoaderFindModule(UBYTE *pBuffer);
void      cLoaderGetModuleName(UBYTE *pDst, UBYTE *pModule);
UWORD     cLoaderCreateFile(UBYTE *pFileName, ULONG *pLength, UBYTE bLinear, UBYTE fType);
UWORD     cLoaderRenameFile(UBYTE *pFileName, UBYTE *pBuffer, ULONG *pLength);
UWORD     cLoaderOpenRead(UBYTE *pFileName, UBYTE *pBuffer, ULONG *pLength, UBYTE bLinear);
UWORD     cLoaderDeleteFile(UBYTE *pFileName);
UWORD     cLoaderResizeFile(UBYTE *pFileName, ULONG pLength);

void      cLoaderInit(void* pHeader)
{

  IOMapLoader.pFunc       = &cLoaderFileRq;
  VarsLoader.IoMapHandle  = FALSE;
  VarsLoader.Resizing     = FALSE;
  pHeaders = pHeader;
  dLoaderInit();
  IOMapLoader.FreeUserFlash = dLoaderReturnFreeUserFlash();
}

void      cLoaderCtrl(void)
{
  if (VarsLoader.Resizing) 
  {
    // keep resizing the file currently in the file resize operation
    // copy 1024 bytes from old file handle to new file handle
    // if no more bytes to copy then set Resizing to FALSE,
    // close both files, and delete the old file.
  }
}

UWORD cLoaderCreateFile(UBYTE *pFileName, ULONG *pLength, UBYTE bLinear, UBYTE fType)
{
  UWORD ReturnState;
  /* This is to create a new file */
  ReturnState = dLoaderCreateFileHeader(*pLength, pFileName, bLinear, fType);
  if (0x8000 <= ReturnState)
  {
    dLoaderCloseHandle(ReturnState);
  }
  else
  {
    IOMapLoader.FreeUserFlash = dLoaderReturnFreeUserFlash();
  }
  return ReturnState;
}

UWORD cLoaderRenameFile(UBYTE *pFileName, UBYTE *pBuffer, ULONG *pLength)
{
  UWORD ReturnState;
  UBYTE FoundName[FILENAME_LENGTH + 1];
  
  /* Check for file exists*/
  ReturnState = dLoaderFind(pBuffer, FoundName, pLength, pLength, (UBYTE) SEARCHING);
  dLoaderCloseHandle(LOADER_HANDLE(ReturnState));
  if (FILENOTFOUND == LOADER_ERR(ReturnState))
  {
    ReturnState = dLoaderFind(pFileName, FoundName, pLength, pLength, (UBYTE) SEARCHING);
    if (ReturnState < 0x8000)
    {
      ReturnState = dLoaderCheckFiles((UBYTE) ReturnState);
      if (ReturnState < 0x8000)
      {
        dLoaderRenameFile((UBYTE) ReturnState, pBuffer);
      }
    }
    dLoaderCloseHandle(LOADER_HANDLE(ReturnState));
  }
  else
  {
    if (SUCCESS == LOADER_ERR(ReturnState))
    {
      ReturnState |= FILEEXISTS;
    }
  }
  return ReturnState;
}

UWORD cLoaderOpenRead(UBYTE *pFileName, UBYTE *pBuffer, ULONG *pLength, UBYTE bLinear)
{
  UWORD ReturnState;
  if (bLinear)
    ReturnState = dLoaderGetFilePtr(pFileName, pBuffer, pLength);
  else
    ReturnState = dLoaderOpenRead(pFileName, pLength);
  if (0x8000 <= ReturnState)
  {
    dLoaderCloseHandle(ReturnState);
  }
  return ReturnState;
}

UWORD cLoaderDeleteFile(UBYTE *pFileName)
{
  UWORD ReturnState;
  ReturnState = dLoaderDelete(pFileName);
  IOMapLoader.FreeUserFlash = dLoaderReturnFreeUserFlash();
  return ReturnState;
}

UWORD cLoaderResizeFile(UBYTE *pFileName, ULONG pLength)
{
  UWORD ReturnState = SUCCESS;
  /* 
    All that this method can do is start the process of
    resizing a file.  To do that we will 
    a) rename the file
    b) open old file for reading
    c) create new file for writing
    d) store both handles in VarsLoader & set resizing flag
    e) if any errors occur in a, b, or c then restore original file
    f) return LOADER_BUSY (maybe?)
  */
/*
  // rename file to _tmpoldname
  strcat __frsFRArgs.NewFilename, '_tmp', __frsOldName
  mov __frsFRArgs.OldFilename, __frsOldName
  syscall FileRename, __frsFRArgs
  mov __frsResult, __frsFRArgs.Result
  brtst NEQ, __frsEnd, __frsResult
  // old file has been renamed successfully
  mov __frsFOReadArgs.Filename, __frsFRArgs.NewFilename
  syscall FileOpenRead, __frsFOReadArgs
  mov __frsResult, __frsFOReadArgs.Result
  brtst NEQ, __frsOpenReadFailed, __frsResult
  // renamed file is open for reading
  mov __frsFOWriteArgs.Filename, __frsOldName
  mov __frsFOWriteArgs.Length, __frsNewSize
  syscall FileOpenWrite, __frsFOWriteArgs
  mov __frsResult, __frsFOWriteArgs.Result
  brtst NEQ, __frsOpenWriteFailed, __frsResult
  // both files are open
  mov __frsFReadArgs.FileHandle, __frsFOReadArgs.FileHandle
  mov __frsFWriteArgs.FileHandle, __frsFOWriteArgs.FileHandle
__frsCopyLoop:
  set __frsFReadArgs.Length, 1024
  syscall FileRead, __frsFReadArgs
  brtst NEQ, __frsEndLoop, __frsFReadArgs.Result
  brtst LTEQ, __frsEndLoop, __frsFReadArgs.Length
  mov __frsFWriteArgs.Buffer, __frsFReadArgs.Buffer
  mov __frsFWriteArgs.Length, __frsFReadArgs.Length
  syscall FileWrite, __frsFWriteArgs
  brtst NEQ, __frsEndLoop, __frsFWriteArgs.Result
  jmp __frsCopyLoop
__frsEndLoop:
  // close read file
  mov __frsFCArgs.FileHandle, __frsFOReadArgs.FileHandle
  syscall FileClose, __frsFCArgs
  // close write file
  mov __frsFCArgs.FileHandle, __frsFOWriteArgs.FileHandle
  syscall FileClose, __frsFCArgs
  // delete read file
  mov __frsFDArgs.Filename, __frsFOReadArgs.Filename
  syscall FileDelete, __frsFDArgs
  jmp __frsEnd
__frsOpenWriteFailed:
  // close read file
  mov __frsFCArgs.FileHandle, __frsFOReadArgs.FileHandle
  syscall FileClose, __frsFCArgs
//  jmp __frsEnd
__frsOpenReadFailed:
  // if the open read failed rename tmp back to original and exit
  mov __frsFRArgs.OldFilename, __frsFRArgs.NewFilename
  mov __frsFRArgs.NewFilename, __frsOldName
  syscall FileRename, __frsFRArgs
__frsEnd:
  return
*/
  return ReturnState;
}

UWORD     cLoaderFileRq(UBYTE Cmd, UBYTE *pFileName, UBYTE *pBuffer, ULONG *pLength)
{
  UWORD   ReturnState;

  ReturnState = SUCCESS;

  switch(Cmd)
  {
    case OPENREAD:
    {
      ReturnState = cLoaderOpenRead(pFileName, pBuffer, pLength, FALSE);
    }
    break;
    case OPENREADLINEAR:
    {
      ReturnState = cLoaderOpenRead(pFileName, pBuffer, pLength, TRUE);
    }
    break;
    case OPENWRITE:
    {

      /* This is to create a new file */
      ReturnState = cLoaderCreateFile(pFileName, pLength, (UBYTE) NONLINEAR, SYSTEMFILE);
    }
    break;
    case OPENWRITELINEAR:
    {
      ReturnState = cLoaderCreateFile(pFileName, pLength, (UBYTE) LINEAR, SYSTEMFILE);
    }
    break;
    case OPENWRITEDATA:
    {
      ReturnState = cLoaderCreateFile(pFileName, pLength, (UBYTE) NONLINEAR, DATAFILE);
    }
    break;
    case OPENAPPENDDATA:
    {
      ReturnState = dLoaderOpenAppend(pFileName, pLength);
      if (LOADER_ERR(ReturnState) != SUCCESS)
      {
        dLoaderCloseHandle(ReturnState);
      }
    }
    break;
    case CLOSE:
    {
      ReturnState = dLoaderCloseHandle(*pFileName);
    }
    break;
    case CROPDATAFILE:
    {
      ReturnState = dLoaderCropDatafile(*pFileName);
      IOMapLoader.FreeUserFlash = dLoaderReturnFreeUserFlash();
    }
    break;
    case RESIZEDATAFILE:
    {
      ReturnState = cLoaderResizeFile(pFileName, *pLength);
      IOMapLoader.FreeUserFlash = dLoaderReturnFreeUserFlash();
    }
    break;
    case SEEKFROMSTART:
    case SEEKFROMCURRENT:
    case SEEKFROMEND:
    {
      // *pFileName is the handle, *pLength is the offset, Cmd-SEEKFROMSTART is the origin
      ReturnState = dLoaderSeek(*pFileName, *(SLONG*)pLength, Cmd-SEEKFROMSTART);
    }
    break;
    case READ:
    {
      ReturnState = dLoaderRead(*pFileName, pBuffer, pLength);
    }
    break;
    case WRITE:
    {
      ReturnState = dLoaderWriteData(*pFileName, pBuffer, (UWORD*)pLength);
    }
    break;
    case FINDFIRST:
    {
      ULONG DataLength;

      ReturnState = dLoaderFind(pFileName, pBuffer, pLength, &DataLength, (UBYTE) SEARCHING);
      if (0x8000 <= ReturnState)
      {
        dLoaderCloseHandle(ReturnState);
      }
    }
    break;
    case FINDNEXT:
    {
      UWORD Handle;
      ULONG DataLength;

      Handle = *pFileName;
      ReturnState = dLoaderFindNext(Handle, pBuffer, pLength, &DataLength);
    }
    break;
    case DELETE:
    {
      ReturnState = cLoaderDeleteFile(pFileName);
/*
      ReturnState = dLoaderDelete(pFileName);
      IOMapLoader.FreeUserFlash = dLoaderReturnFreeUserFlash();
*/
    }
    break;
    case DELETEUSERFLASH:
    {
      dLoaderDeleteAllFiles();
      IOMapLoader.FreeUserFlash = dLoaderReturnFreeUserFlash();

    }
    break;

    case FINDFIRSTMODULE:
    {
      if (FALSE == VarsLoader.IoMapHandle)
      {
        VarsLoader.IoMapHandle    = TRUE;
        VarsLoader.ModSearchIndex = 0;
        dLoaderInsertSearchStr(VarsLoader.ModSearchStr, pFileName, &(VarsLoader.ModSearchType));
        ReturnState = cLoaderFindModule(pBuffer);
      }
      else
      {
        ReturnState = NOMOREHANDLES;
      }
    }
    break;

    case FINDNEXTMODULE:
    {
      ReturnState = cLoaderFindModule(pBuffer);
    }
    break;

    case CLOSEMODHANDLE:
    {
      VarsLoader.IoMapHandle  = FALSE;
      ReturnState             = SUCCESS;
    }
    break;

    case IOMAPREAD:
    {

      UBYTE *pIoMap;
      ULONG Ptr;
      UWORD IoMapSize;
      UBYTE Tmp;

      pIoMap = NULL;
      ReturnState = cLoaderGetIoMapInfo((*(ULONG*)(pFileName)),(UBYTE*)(&pIoMap), &IoMapSize);

      /* Did we have a valid module ID ?*/
      if (SUCCESS == LOADER_ERR(ReturnState))
      {

        /* This is the offset  */
        Ptr  =   pBuffer[0];
        Ptr |=  (UWORD)pBuffer[1] << 8;

        /* is the offset within the limits of the iomap size? */
        if ((Ptr + *pLength) <= IoMapSize)
        {

          /* Add the offset to the pointer */
          pIoMap += Ptr;

          for (Tmp = 0; Tmp < *pLength; Tmp++)
          {
            pBuffer[Tmp + 2] = *pIoMap;
            pIoMap++;
          }
        }
        else
        {

          /* Error - not within the bounderies */
          ReturnState = OUTOFBOUNDERY;
          *pLength    = 0;
        }
      }
      else
      {

        /* Error - not a valid module id */
        *pLength = 0;
      }
    }
    break;

    case IOMAPWRITE:
    {
      UBYTE *pIoMap;
      ULONG Ptr;
      UWORD IoMapSize;
      UWORD Tmp;


      pIoMap = NULL;
      ReturnState = cLoaderGetIoMapInfo(*((ULONG*)pFileName), (UBYTE*)&pIoMap, &IoMapSize);

      if (LOADER_ERR(ReturnState) == SUCCESS)
      {

        /* This is the offset  */
        Ptr  = *pBuffer;
        pBuffer++;
        Tmp = *pBuffer;
        Ptr |= Tmp << 8;
        pBuffer++;

        if ((Ptr + *pLength) <= IoMapSize)
        {

          pIoMap += Ptr;
          for (Tmp = 0; Tmp < *pLength; Tmp++)
          {
            *pIoMap = pBuffer[Tmp];
            pIoMap++;
          }
        }
        else
        {

          /* Error - not within the bounderies */
          ReturnState  = OUTOFBOUNDERY;
          *pLength = 0;
        }
      }
      else
      {

        /* Error - not a valid module id */
        *pLength = 0;
      }
    }
    break;

    case RENAMEFILE:
    {
      ReturnState = cLoaderRenameFile(pFileName, pBuffer, pLength);
    }
    break;

    default:
    {
    }
    break;
  }
  return (ReturnState);
}

UWORD     cLoaderGetIoMapInfo(ULONG ModuleId, UBYTE *pIoMap, UWORD *pIoMapSize)
{
  UBYTE   Tmp;
  UBYTE   Exit;
  UWORD   RtnVal;

  RtnVal = SUCCESS;
  Tmp = 0;
  Exit = FALSE;
  while((Tmp < 32) && (Exit == FALSE))
  {
    if ((*(pHeaders[Tmp])).ModuleID == ModuleId)
    {
      Exit = TRUE;
    }
    else
    {
      Tmp++;
    }
  }

  /* Did we have a valid module ID ?*/
  if (TRUE == Exit)
  {
    /* Get the pointer of the module io map */
   *((ULONG *)pIoMap) = (ULONG)((*(pHeaders[Tmp])).pIOMap);
    *pIoMapSize = (*(pHeaders[Tmp])).IOMapSize;
  }
  else
  {
    RtnVal = MODULENOTFOUND;
  }

  /* To avoid a warning - this is optimized away */
  *pIoMap = *pIoMap;
  return(RtnVal);
}

UWORD     cLoaderFindModule(UBYTE *pBuffer)
{
  UBYTE   Tmp;
  UWORD   RtnVal;
  UBYTE   ModuleName[FILENAME_SIZE];

  RtnVal  = MODULENOTFOUND;

  for (Tmp = VarsLoader.ModSearchIndex; Tmp < 32; Tmp++)
  {
    if (pHeaders[Tmp] != 0)
    {

      cLoaderGetModuleName(ModuleName, ((*(pHeaders[Tmp])).ModuleName));
      if (SUCCESS == dLoaderCheckName(ModuleName, VarsLoader.ModSearchStr, VarsLoader.ModSearchType))
      {

        dLoaderCopyFileName(pBuffer, ModuleName);

        pBuffer[FILENAME_SIZE] = (UBYTE) ((*(pHeaders[Tmp])).ModuleID);
        pBuffer[FILENAME_SIZE + 1] = (UBYTE)(((*(pHeaders[Tmp])).ModuleID) >> 8);
        pBuffer[FILENAME_SIZE + 2] = (UBYTE)(((*(pHeaders[Tmp])).ModuleID) >> 16);
        pBuffer[FILENAME_SIZE + 3] = (UBYTE)(((*(pHeaders[Tmp])).ModuleID) >> 24);

        pBuffer[FILENAME_SIZE + 4] = (UBYTE)(((*(pHeaders[Tmp])).ModuleSize));
        pBuffer[FILENAME_SIZE + 5] = (UBYTE)(((*(pHeaders[Tmp])).ModuleSize) >> 8);
        pBuffer[FILENAME_SIZE + 6] = (UBYTE)(((*(pHeaders[Tmp])).ModuleSize) >> 16);
        pBuffer[FILENAME_SIZE + 7] = (UBYTE)(((*(pHeaders[Tmp])).ModuleSize) >> 24);

        pBuffer[FILENAME_SIZE + 8] = (UBYTE) ((*(pHeaders[Tmp])).IOMapSize);
        pBuffer[FILENAME_SIZE + 9] = (UBYTE)(((*(pHeaders[Tmp])).IOMapSize) >> 8);

        RtnVal     = SUCCESS;
        (VarsLoader.ModSearchIndex)    = Tmp + 1;
        Tmp        = 32;
      }
    }
  }
  return(RtnVal);
}

void      cLoaderGetModuleName(UBYTE *pDst, UBYTE *pModule)
{
  UBYTE   Tmp;

  for(Tmp = 0; Tmp < FILENAME_SIZE; Tmp++)
  {
    if (0 != pModule[Tmp])
    {
      pDst[Tmp] = pModule[Tmp];
    }
    else
    {
      pDst[Tmp++] = '.';
      pDst[Tmp++] = 'm';
      pDst[Tmp++] = 'o';
      pDst[Tmp++] = 'd';
      pDst[Tmp] = '\0';
      Tmp = FILENAME_SIZE;
    }
  }
}

void      cLoaderExit(void)
{
}