1 /*

2 * This File contains all hardware dependent C code.

3 */

4

5

6 #include "VMS.h"

7

8 /*Create stack, then create __cdecl structure on it and put initialData and

9 * pointer to the new structure instance into the parameter positions on

10 * the stack

11 *Then put function pointer into nextInstrPt -- the stack is setup in std

12 * call structure, so jumping to function ptr is same as a GCC generated

13 * function call

14 *No need to save registers on old stack frame, because there's no old

15 * animator state to return to --

16 *

17 */

18 inline VirtProcr *

19 create_procr_helper( VirtProcr *newPr, VirtProcrFnPtr fnPtr,

20 void *initialData, void *stackLocs )

21 {

22 void *stackPtr;

23

24 newPr->startOfStack = stackLocs;

25 newPr->procrID = _VMSMasterEnv->numProcrsCreated++;

26 newPr->numTimesScheduled = 0;

27 newPr->initialData = initialData;

28 newPr->requests = NULL;

29 newPr->schedSlot = NULL;

30

31 /*

32 * Hardware dependent part

33 */

34 //instead of calling the function directly, call a wrapper function to fetch

35 //arguments from stack

36 newPr->nextInstrPt = (VirtProcrFnPtr)&startVirtProcrFn;

37

38 //fnPtr takes two params -- void *initData & void *animProcr

39 //alloc stack locations, make stackPtr be the highest addr minus room

40 // for 2 params + return addr. Return addr (NULL) is in loc pointed to

41 // by stackPtr, initData at stackPtr + 8 bytes, animatingPr just above

42 stackPtr = ( (void *)stackLocs + VIRT_PROCR_STACK_SIZE - 4*sizeof(void*));

43

44 //setup __cdecl on stack -- coreloop will switch to stackPtr before jmp

45 *((VirtProcr**)stackPtr + 2 ) = newPr; //rightmost param

46 *((void**)stackPtr + 1 ) = initialData; //next param to left

47 *((void**)stackPtr) = (void*)fnPtr;

48

49 /*

50 * end of Hardware dependent part

51 */

52

53 newPr->stackPtr = stackPtr; //core loop will switch to this, then

54 newPr->framePtr = stackPtr; //suspend loop will save new stack & frame ptr

55

56 //============================= MEASUREMENT STUFF ========================

57 #ifdef STATS__TURN_ON_PROBES

58 //struct timeval timeStamp;

59 //gettimeofday( &(timeStamp), NULL);

60 //newPr->createPtInSecs = timeStamp.tv_sec +(timeStamp.tv_usec/1000000.0) -

61 // _VMSMasterEnv->createPtInSecs;

62 #endif

63 #ifdef MEAS__PERF_COUNTERS

64 /*

65 newPr->counter_history = VMS__malloc(10*sizeof(void*));

66 newPr->counter_history_array_info = makePrivDynArrayInfoFrom((void*)&(newPr->counter_history),10);

67 CounterRecord* newRecord = VMS__malloc(sizeof(CounterRecord));

68 newRecord->task_position = 0;

69 newRecord->vp_id = newPr->procrID;

70 newRecord->addr_of_libcall_for_req = fnPtr;

71 newRecord->sc_done_cycles = 0;

72 newRecord->sc_done_instrs = 0;

73 newRecord->req_cycles = 0;

74 newRecord->req_instrs = 0;

75 addToDynArray( (void*) newRecord, newPr->counter_history_array_info);

76 */

77 #endif

78 //========================================================================

79

80 return newPr;

81 }