int main()
{
unsigned long i = 0, cnt = 0;
unsigned char c;
GPBCON = GPB7_out|GPB8_out|GPB9_out|GPB10_out;
init_uart( ); //波特率57600，8N1(8个数据位，无校验位，1个停止位)
DPRINTK(KERNEL_DEBUG,"\n\rkernel:enter main\n\r");
sched_init( );
// OS_ENTER_CRITICAL();
OSCreateProcess(15*1024,1024,NULL,NULL,5);
DPRINTK(KERNEL_DEBUG,"\n\rkernel:first\n\r");
while(1){
// schedule();
// DPRINTK(KERNEL_DEBUG,"kernel:main\n\r");
/* if(i&1){
DPRINTK(KERNEL_DEBUG,"1\n\r");
}
*/
// GPBDAT = (~(++i))<<7;
DPRINTK(KERNEL_DEBUG,"kernel:process 0\n\r");
wait(1000000);
}
return 0;
}
void osInit(int argc, char *argv[]) {
void *PageTable = (void *) calloc(2, NUMBER_VIRTUAL_PAGES);
INT32 i;
MEMORY_MAPPED_IO mmio;
long ProcessID;
long ErrorReturned;
PCB* pcb;
// Demonstrates how calling arguments are passed thru to here
printf("Program called with %d arguments:", argc);
for (i = 0; i < argc; i++)
printf(" %s", argv[i]);
printf("\n");
printf("Calling with argument 'sample' executes the sample program.\n");
// Here we check if a second argument is present on the command line.
// If so, run in multiprocessor mode
if (argc > 2) {
if (strcmp(argv[2], "M") || strcmp(argv[2], "m")) {
printf("Simulation is running as a MultProcessor\n\n");
mmio.Mode = Z502SetProcessorNumber;
mmio.Field1 = MAX_NUMBER_OF_PROCESSORS;
mmio.Field2 = (long) 0;
mmio.Field3 = (long) 0;
mmio.Field4 = (long) 0;
MEM_WRITE(Z502Processor, &mmio); // Set the number of processors
}
} else {
printf("Simulation is running as a UniProcessor\n");
printf(
"Add an 'M' to the command line to invoke multiprocessor operation.\n\n");
}
// Setup so handlers will come to code in base.c
TO_VECTOR[TO_VECTOR_INT_HANDLER_ADDR ] = (void *) InterruptHandler;
TO_VECTOR[TO_VECTOR_FAULT_HANDLER_ADDR ] = (void *) FaultHandler;
TO_VECTOR[TO_VECTOR_TRAP_HANDLER_ADDR ] = (void *) svc;
// Determine if the switch was set, and if so go to demo routine.
PageTable = (void *) calloc(2, NUMBER_VIRTUAL_PAGES);
if ((argc > 1) && (strcmp(argv[1], "sample") == 0)) {
mmio.Mode = Z502InitializeContext;
mmio.Field1 = 0;
mmio.Field2 = (long) SampleCode;
mmio.Field3 = (long) PageTable;
MEM_WRITE(Z502Context, &mmio); // Start of Make Context Sequence
mmio.Mode = Z502StartContext;
// Field1 contains the value of the context returned in the last call
mmio.Field2 = START_NEW_CONTEXT_AND_SUSPEND;
MEM_WRITE(Z502Context, &mmio); // Start up the context
} // End of handler for sample code - This routine should never return here
// By default test0 runs if no arguments are given on the command line
// Creation and Switching of contexts should be done in a separate routine.
// This should be done by a "OsMakeProcess" routine, so that
// test0 runs on a process recognized by the operating system.
if ((argc > 1) && (strcmp(argv[1], "test0") == 0)) {
mmio.Mode = Z502InitializeContext;
mmio.Field1 = 0;
mmio.Field2 = (long) test0;
mmio.Field3 = (long) PageTable;
mmio.Field4 = 0;
MEM_WRITE(Z502Context, &mmio); // Start of Make Context Sequence
OSCreateProcess(argv[1], mmio.Field1, 100, 0, mmio.Field4);
mmio.Mode = Z502StartContext;
// Field1 contains the value of the context returned in the last call
mmio.Field2 = START_NEW_CONTEXT_AND_SUSPEND;
MEM_WRITE(Z502Context, &mmio); // Start up the context
}
if ((argc > 1) && (strcmp(argv[1], "test1") == 0)) {
mmio.Mode = Z502InitializeContext;
mmio.Field1 = 0;
mmio.Field2 = (long) test1;
mmio.Field3 = (long) PageTable;
mmio.Field4 = 0;
InitializePCDQ(15);
InitTimerQueue(15);
InitReadyQueue(15);
InitDiskQueue(15);
MEM_WRITE(Z502Context, &mmio); // Start of Make Context Sequence
OSCreateProcess(argv[1], mmio.Field1, 100, 0, mmio.Field4);
mmio.Mode = Z502StartContext;
// Field1 contains the value of the context returned in the last call
mmio.Field2 = START_NEW_CONTEXT_AND_SUSPEND;
MEM_WRITE(Z502Context, &mmio); // Start up the context
}
if ((argc > 1) && (strcmp(argv[1], "test2") == 0)) {
mmio.Mode = Z502InitializeContext;
mmio.Field1 = 0;
mmio.Field2 = (long) test2;
mmio.Field3 = (long) PageTable;
mmio.Field4 = 0;
InitializePCDQ(15);
InitTimerQueue(15);
InitReadyQueue(15);
InitDiskQueue(15);
MEM_WRITE(Z502Context, &mmio); // Start of Make Context Sequence
OSCreateProcess(argv[1], mmio.Field1, 100, 0, mmio.Field4);
mmio.Mode = Z502StartContext;
// Field1 contains the value of the context returned in the last call
mmio.Field2 = START_NEW_CONTEXT_AND_SUSPEND;
MEM_WRITE(Z502Context, &mmio); // Start up the context
}
if ((argc > 1) && (strcmp(argv[1], "test3") == 0)) {
mmio.Mode = Z502InitializeContext;
mmio.Field1 = 0;
mmio.Field2 = (long) test3;
mmio.Field3 = (long) PageTable;
mmio.Field4 = 0;
InitializePCDQ(15);
InitTimerQueue(15);
InitReadyQueue(15);
InitDiskQueue(15);
MEM_WRITE(Z502Context, &mmio); // Start of Make Context Sequence
OSCreateProcess(argv[1], mmio.Field1, 100, 0, mmio.Field4);
mmio.Mode = Z502StartContext;
// Field1 contains the value of the context returned in the last call
mmio.Field2 = START_NEW_CONTEXT_AND_SUSPEND;
MEM_WRITE(Z502Context, &mmio); // Start up the context
}
if ((argc > 1) && (strcmp(argv[1], "test4") == 0)) {
mmio.Mode = Z502InitializeContext;
mmio.Field1 = 0;
mmio.Field2 = (long) test4;
mmio.Field3 = (long) PageTable;
mmio.Field4 = 0;
InitializePCDQ(15);
InitTimerQueue(15);
InitReadyQueue(15);
InitDiskQueue(15);
MEM_WRITE(Z502Context, &mmio); // Start of Make Context Sequence
pcb=OSCreateProcess(argv[1], mmio.Field1, 10, 0, mmio.Field4);
mmio.Mode = Z502StartContext;
// Field1 contains the value of the context returned in the last call
mmio.Field2 = START_NEW_CONTEXT_AND_SUSPEND;
MEM_WRITE(Z502Context, &mmio); // Start up the context
// EnQueue(&pcb_ready_queue, (void*) pcb);
// Dispatcher();
}
if ((argc > 1) && (strcmp(argv[1], "test5") == 0)) {
mmio.Mode = Z502InitializeContext;
mmio.Field1 = 0;
mmio.Field2 = (long) test5;
mmio.Field3 = (long) PageTable;
mmio.Field4 = 0;
InitializePCDQ(15);
InitTimerQueue(15);
InitReadyQueue(15);
InitDiskQueue(15);
MEM_WRITE(Z502Context, &mmio); // Start of Make Context Sequence
OSCreateProcess(argv[1], mmio.Field1, 100, 0, mmio.Field4);
mmio.Mode = Z502StartContext;
// Field1 contains the value of the context returned in the last call
mmio.Field2 = START_NEW_CONTEXT_AND_SUSPEND;
MEM_WRITE(Z502Context, &mmio); // Start up the context
}
if ((argc > 1) && (strcmp(argv[1], "test6") == 0)) {
mmio.Mode = Z502InitializeContext;
mmio.Field1 = 0;
mmio.Field2 = (long) test6;
mmio.Field3 = (long) PageTable;
mmio.Field4 = 0;
InitializePCDQ(15);
InitTimerQueue(15);
InitReadyQueue(15);
InitDiskQueue(15);
MEM_WRITE(Z502Context, &mmio); // Start of Make Context Sequence
OSCreateProcess(argv[1], mmio.Field1, 100, 0, mmio.Field4);
mmio.Mode = Z502StartContext;
// Field1 contains the value of the context returned in the last call
mmio.Field2 = START_NEW_CONTEXT_AND_SUSPEND;
MEM_WRITE(Z502Context, &mmio); // Start up the context
}
if ((argc > 1) && (strcmp(argv[1], "test7") == 0)) {
mmio.Mode = Z502InitializeContext;
mmio.Field1 = 0;
mmio.Field2 = (long) test7;
mmio.Field3 = (long) PageTable;
mmio.Field4 = 0;
InitializePCDQ(15);
InitTimerQueue(15);
InitReadyQueue(15);
InitDiskQueue(15);
MEM_WRITE(Z502Context, &mmio); // Start of Make Context Sequence
OSCreateProcess(argv[1], mmio.Field1, 100, 0, mmio.Field4);
mmio.Mode = Z502StartContext;
// Field1 contains the value of the context returned in the last call
mmio.Field2 = START_NEW_CONTEXT_AND_SUSPEND;
MEM_WRITE(Z502Context, &mmio); // Start up the context
}
if ((argc > 1) && (strcmp(argv[1], "test8") == 0)) {
mmio.Mode = Z502InitializeContext;
mmio.Field1 = 0;
mmio.Field2 = (long) test8;
mmio.Field3 = (long) PageTable;
mmio.Field4 = 0;
InitializePCDQ(15);
InitTimerQueue(15);
InitReadyQueue(15);
InitDiskQueue(15);
MEM_WRITE(Z502Context, &mmio); // Start of Make Context Sequence
OSCreateProcess(argv[1], mmio.Field1, 100, 0, mmio.Field4);
mmio.Mode = Z502StartContext;
// Field1 contains the value of the context returned in the last call
mmio.Field2 = START_NEW_CONTEXT_AND_SUSPEND;
MEM_WRITE(Z502Context, &mmio); // Start up the context
}
} // End of osInit
void svc(SYSTEM_CALL_DATA *SystemCallData) {
short call_type;
static short do_print = 10;
short i;
INT32 Time;
int Status;
void *PageTable;
char* processName;
MEMORY_MAPPED_IO mmio;
call_type = (short) SystemCallData->SystemCallNumber;
if (do_print > 0) {
printf("SVC handler: %s\n", call_names[call_type]);
for (i = 0; i < SystemCallData->NumberOfArguments - 1; i++) {
//Value = (long)*SystemCallData->Argument[i];
printf("Arg %d: Contents = (Decimal) %8ld, (Hex) %8lX\n", i,
(unsigned long) SystemCallData->Argument[i],
(unsigned long) SystemCallData->Argument[i]);
}
do_print--;
}
// printf((char *) SystemCallData->Argument[i]);
switch (call_type) {
//get time service call
case SYSNUM_GET_TIME_OF_DAY:
mmio.Mode = Z502ReturnValue;
mmio.Field1 = mmio.Field2 = mmio.Field3 = 0;
MEM_READ(Z502Clock, &mmio);
*(long *) SystemCallData->Argument[0] = mmio.Field1;
break;
//system sleep call
case SYSNUM_SLEEP:
mmio.Mode = Z502ReturnValue;
mmio.Field1 = mmio.Field2 = mmio.Field3 = 0;
MEM_READ(Z502Clock, &mmio);
Time = (long) SystemCallData->Argument[0];
pcb = FindCurrent(runningProcessPid);
pcb->wakeUpTimer = Time;
EnTimerQueue(&pcb_timer_queue, pcb);
//start timer
headPCB = GetHead(&pcb_timer_queue)->data;
if (pcb == headPCB) {
mmio.Mode = Z502Start;
mmio.Field1 = (long) SystemCallData->Argument[0];
mmio.Field2 = mmio.Field3 = 0;
MEM_WRITE(Z502Timer, &mmio);
}
Dispatcher();
break;
//system create process
case SYSNUM_CREATE_PROCESS:
if ((long) SystemCallData->Argument[2] < 0) {
*SystemCallData->Argument[4] = ERR_BAD_PARAM;
} else {
PageTable = (void *) calloc(2, NUMBER_VIRTUAL_PAGES);
mmio.Mode = Z502InitializeContext;
mmio.Field1 = 0;
mmio.Field2 = (long) SystemCallData->Argument[1];
mmio.Field3 = (long) PageTable;
MEM_WRITE(Z502Context, &mmio);
pcb = OSCreateProcess((char*) SystemCallData->Argument[0],
(long) mmio.Field1, (long) SystemCallData->Argument[2],
(long) SystemCallData->Argument[3],
(long) SystemCallData->Argument[4]);
if (pcb != NULL) {
EnQueue(&pcb_ready_queue, (void*) pcb);
*SystemCallData->Argument[3] = pcb->pid;
*SystemCallData->Argument[4] = ERR_SUCCESS;
} else {
*SystemCallData->Argument[4] = ERR_BAD_PARAM;
}
}
break;
//system get process id
case SYSNUM_GET_PROCESS_ID:
processName = (char*) SystemCallData->Argument[0];
if (strlen(processName) == 0) {
*SystemCallData->Argument[1] = runningProcessPid;
*SystemCallData->Argument[2] = ERR_SUCCESS;
} else {
pcb = FindPCBByName(processName);
}
if (pcb != NULL) {
*SystemCallData->Argument[1] = pcb->pid;
*SystemCallData->Argument[2] = ERR_SUCCESS;
} else {
*SystemCallData->Argument[2] = ERR_BAD_PARAM;
}
break;
case SYSNUM_PHYSICAL_DISK_READ:
do {
mmio.Mode = Z502Status;
mmio.Field1 = (long) SystemCallData->Argument[0];
mmio.Field2 = mmio.Field3 = 0;
MEM_READ(Z502Disk, &mmio);
CALL(WasteTime());
} while (mmio.Field2 != DEVICE_FREE);
pcb = FindCurrent(runningProcessPid);
if (pcb != NULL) {
pcb->diskID = (int) SystemCallData->Argument[0];
pcb->sectorID = (int) SystemCallData->Argument[1];
pcb->memoryBuffer = (void*) SystemCallData->Argument[2];
EnQueue(&(pcb_disk_queue[pcb->diskID]), (void*) pcb);
}
mmio.Mode = Z502DiskRead;
mmio.Field1 = (long) SystemCallData->Argument[0];
mmio.Field2 = (long) SystemCallData->Argument[1];
mmio.Field3 = (long) SystemCallData->Argument[2];
mmio.Field4 = 0;
MEM_READ(Z502Disk, &mmio);
do {
mmio.Mode = Z502Status;
mmio.Field1 = (long) SystemCallData->Argument[0];
mmio.Field2 = mmio.Field3 = 0;
MEM_READ(Z502Disk, &mmio);
CALL(WasteTime());
} while (mmio.Field2 != DEVICE_FREE);
Dispatcher();
break;
case SYSNUM_PHYSICAL_DISK_WRITE:
do {
mmio.Mode = Z502Status;
mmio.Field1 = (long) SystemCallData->Argument[0];
mmio.Field2 = mmio.Field3 = 0;
MEM_READ(Z502Disk, &mmio);
CALL(WasteTime());
} while (mmio.Field2 != DEVICE_FREE);
pcb = FindCurrent(runningProcessPid);
if (pcb != NULL) {
pcb->diskID = (int) SystemCallData->Argument[0];
pcb->sectorID = (int) SystemCallData->Argument[1];
pcb->memoryBuffer = (void*) SystemCallData->Argument[2];
EnQueue(&(pcb_disk_queue[pcb->diskID]), (void*) pcb);
}
mmio.Mode = Z502DiskWrite;
mmio.Field1 = (long) SystemCallData->Argument[0];
mmio.Field2 = (long) SystemCallData->Argument[1];
mmio.Field3 = (long) SystemCallData->Argument[2];
MEM_WRITE(Z502Disk, &mmio);
// mmio.Mode = Z502Action;
// mmio.Field1 = mmio.Field2 = mmio.Field3 = 0;
// MEM_WRITE(Z502Idle, &mmio);
do {
mmio.Mode = Z502Status;
mmio.Field1 = (long) SystemCallData->Argument[0];
mmio.Field2 = mmio.Field3 = 0;
MEM_READ(Z502Disk, &mmio);
CALL(WasteTime());
} while (mmio.Field2 != DEVICE_FREE);
Dispatcher();
break;
//system terminate call
case SYSNUM_TERMINATE_PROCESS:
//If ProcessID = -1, then terminate self
if ((long) SystemCallData->Argument[0] == -1) {
pcb = FindCurrent(runningProcessPid);
if (pcb != NULL) {
// ReleasePCB();
// RemovePCB(&pcb_ready_queue,(void*)pcb);
// RemovePCB(&pcb_timer_queue,(void*)pcb);
// *SystemCallData->Argument[1] = ERR_SUCCESS;
if (pcb_ready_queue.size == 0 && pcb_timer_queue.size == 0) {
mmio.Mode = Z502ReturnValue;
mmio.Field1 = mmio.Field2 = mmio.Field3 = mmio.Field4 = 0;
MEM_WRITE(Z502Halt, &mmio);
*SystemCallData->Argument[1] = ERR_SUCCESS;
} else {
Dispatcher();
}
} else {
ReleasePCB();
mmio.Mode = Z502ReturnValue;
mmio.Field1 = mmio.Field2 = mmio.Field3 = mmio.Field4 = 0;
MEM_WRITE(Z502Halt, &mmio);
*SystemCallData->Argument[1] = ERR_SUCCESS;
}
} else if ((long) SystemCallData->Argument[0] == -2) {
// terminite all halt
ReleasePCB();
mmio.Mode = Z502ReturnValue;
mmio.Field1 = mmio.Field2 = mmio.Field3 = mmio.Field4 = 0;
MEM_WRITE(Z502Halt, &mmio);
*SystemCallData->Argument[1] = ERR_SUCCESS;
// pcb = FindCurrent(runningProcessPid);
// RemovePCB(&pcb_ready_queue, (void*) pcb);
// RemovePCB(&pcb_timer_queue, (void*) pcb);
// RemovePCB(&pcb_ready_queue, (void*) pcb->childProcesses);
// RemovePCB(&pcb_timer_queue, (void*) pcb->childProcesses);
} else {
pcb = FindPCBByPID(SystemCallData->Argument[0]);
RemovePCB(&pcb_ready_queue, (void*) pcb);
*SystemCallData->Argument[1] = ERR_SUCCESS;
}
break;
defaut: printf("ERROR! call_type not recognized!\n");
printf("Call_type is %i\n", call_type);
}
} // End of svc
void osInit(int argc, char *argv[]) {
void *PageTable = (void *) calloc(2, VIRTUAL_MEM_PAGES);
INT32 i;
MEMORY_MAPPED_IO mmio;
//init Queues
initPCBTable();
initTimerQueue();
initReadyQueue();
initMessageTable();
// Demonstrates how calling arguments are passed thru to here
printf( "Program called with %d arguments:", argc );
for ( i = 0; i < argc; i++ )
printf( " %s", argv[i] );
printf( "\n" );
printf( "Calling with argument 'sample' executes the sample program.\n" );
// Here we check if a second argument is present on the command line.
// If so, run in multiprocessor mode
if ( argc > 2 ){
printf("Simulation is running as a MultProcessor\n\n");
mmio.Mode = Z502SetProcessorNumber;
mmio.Field1 = MAX_NUMBER_OF_PROCESSORS;
mmio.Field2 = (long) 0;
mmio.Field3 = (long) 0;
mmio.Field4 = (long) 0;
MEM_WRITE(Z502Processor, &mmio); // Set the number of processors
}
else {
printf("Simulation is running as a UniProcessor\n");
printf("Add an 'M' to the command line to invoke multiprocessor operation.\n\n");
}
// Setup so handlers will come to code in base.c
TO_VECTOR[TO_VECTOR_INT_HANDLER_ADDR ] = (void *) InterruptHandler;
TO_VECTOR[TO_VECTOR_FAULT_HANDLER_ADDR ] = (void *) FaultHandler;
TO_VECTOR[TO_VECTOR_TRAP_HANDLER_ADDR ] = (void *) svc;
// Determine if the switch was set, and if so go to demo routine.
PageTable = (void *) calloc(2, VIRTUAL_MEM_PAGES);
if ((argc > 1) && (strcmp(argv[1], "sample") == 0)) {
mmio.Mode = Z502InitializeContext;
mmio.Field1 = 0;
mmio.Field2 = (long) SampleCode;
mmio.Field3 = (long) PageTable;
MEM_WRITE(Z502Context, &mmio); // Start of Make Context Sequence
mmio.Mode = Z502StartContext;
// Field1 contains the value of the context returned in the last call
mmio.Field2 = START_NEW_CONTEXT_AND_SUSPEND;
MEM_WRITE(Z502Context, &mmio); // Start up the context
} // End of handler for sample code - This routine should never return here
/****************************Parse Input******************************/
long *TestToRun;
switch (argc){
case 2:
TestToRun = TestParser(argv[1]);
ProcessorMode = Uniprocessor;
break;
case 3:
TestToRun = TestParser(argv[1]);
ProcessorMode = Multiprocessor;
break;
default:
TestToRun = test1c;
ProcessorMode = Uniprocessor;
break;
}
/********************************************************************/
long ErrorReturned;
long newPID;
struct Process_Control_Block *newPCB = OSCreateProcess((long*)"test1", TestToRun, (long*)3, (long*)&newPID, (long*)&ErrorReturned);
if (newPCB != NULL) {
enPCBTable(newPCB);
enReadyQueue(newPCB);
}
Dispatcher();
} // End of osInit
void svc(SYSTEM_CALL_DATA *SystemCallData) {
short call_type;
static short do_print = 10;
short i;
//for hardware interface
MEMORY_MAPPED_IO mmio;
//for GET_TIME_OF_DAY
INT32 Temp_Clock;
//for SLEEP
long Sleep_Time;
struct Process_Control_Block *sleepPCB;
//for RESTART_PROCESS
long PID_restart;
struct Process_Control_Block *restartPCB;
struct Process_Control_Block *recreatedPCB;
//for CREATE_PROCESS
struct Process_Control_Block *newPCB;
//for TERMINATE_PROCESS
long termPID;
struct Process_Control_Block *termPCB;
//for GET_PROCESS_ID
int ReturnedPID;
char* ProcessName;
struct Process_Control_Block *PCBbyProcessName;
//for SUSPEND_PROCESS
int suspendPID;
struct Process_Control_Block *suspendPCB;
//for RESUME_PROCESS
int resumePID;
struct Process_Control_Block *resumePCB;
//for CHANGE_PRIORITY
int changePrioPID;
struct Process_Control_Block *changePrioPCB;
int newPriority;
//for SEND_MESSAGE
long TargetPID;
char *MessageBuffer;
long SendLength;
struct Message *MessageCreated;
long *ErrorReturned_SendMessage;
//for RECEIVE_MESSAGE
long SourcePID;
char *ReceiveBuffer;
long ReceiveLength;
long *ActualSendLength;
long *ActualSourcePID;
long *ErrorReturned_ReceiveMessage;
struct Process_Control_Block *Mess_PCB;
call_type = (short) SystemCallData->SystemCallNumber;
if (do_print > 0) {
printf("SVC handler: %s\n", call_names[call_type]);
for (i = 0; i < SystemCallData->NumberOfArguments - 1; i++) {
//Value = (long)*SystemCallData->Argument[i];
printf("Arg %d: Contents = (Decimal) %8ld, (Hex) %8lX\n", i,
(unsigned long) SystemCallData->Argument[i],
(unsigned long) SystemCallData->Argument[i]);
}
do_print--;
}
switch (call_type) {
//get and return current system time
case SYSNUM_GET_TIME_OF_DAY:
mmio.Mode = Z502ReturnValue;
mmio.Field1 = mmio.Field2 = mmio.Field3 = 0;
MEM_READ(Z502Clock, &mmio);
Temp_Clock = mmio.Field1;
*SystemCallData->Argument[0] = Temp_Clock;
break;
//create a new PCB and put it into pcb table and ready queue
case SYSNUM_CREATE_PROCESS:
//create a new PCB
newPCB = OSCreateProcess(SystemCallData->Argument[0], SystemCallData->Argument[1],
SystemCallData->Argument[2], SystemCallData->Argument[3],
SystemCallData->Argument[4]);
//if create successfully, put it into PCB table and ready queue
if (newPCB != NULL) {
SchedularPrinter("Create", newPCB->ProcessID);//print states
enPCBTable(newPCB);
enReadyQueue(newPCB);
}
break;
//return PID regarding process name
case SYSNUM_GET_PROCESS_ID:
ProcessName = (char*)SystemCallData->Argument[0];
//if no input process name, return the current running PID
if (strcmp(ProcessName, "") == 0) {
PCBbyProcessName = CurrentPCB();
*SystemCallData->Argument[1] = PCBbyProcessName->ProcessID;
*SystemCallData->Argument[2] = ERR_SUCCESS;
}
//find the PCB in PCB table and return PID if found
else {
PCBbyProcessName = findPCBbyProcessName(ProcessName);
//if found, return PID
if (PCBbyProcessName != NULL) {
ReturnedPID = PCBbyProcessName->ProcessID;
*SystemCallData->Argument[1] = ReturnedPID;
*SystemCallData->Argument[2] = ERR_SUCCESS;
}
//if not found, return error
else {
*SystemCallData->Argument[2] = ERR_BAD_PARAM;
}
}
break;
//if a PCB wanna sleep, put itself into timer queue and start
//a new PCB
case SYSNUM_SLEEP:
//print states
SchedularPrinter("Sleep", CurrentPID());
//Calculate WakeUpTime for PCB
Sleep_Time = (long)SystemCallData->Argument[0];
sleepPCB = CurrentPCB();
sleepPCB->WakeUpTime = CurrentTime() + Sleep_Time;
//Put current running PCB into timer queue and reset time
lockTimer();
enTimerQueue(sleepPCB);
if (sleepPCB == timerQueue->First_Element->PCB){
SetTimer(Sleep_Time);
}
unlockTimer();
//in uniprocessor, start a new PCB
//in multiprocessor, only suspend itself
if (ProcessorMode == Uniprocessor) {
//first PCB in Ready Queue starts
Dispatcher();
}
else {
OSSuspendCurrentProcess();
}
break;
//restart a PCB by terminate itself and created a new PCB with everything the same except PID
case SYSNUM_RESTART_PROCESS:
//initial return error
*SystemCallData->Argument[2] = ERR_BAD_PARAM;
PID_restart = (long)SystemCallData->Argument[0];
//if not restart itself
if (PID_restart != CurrentPID()){
//find restarted PCB
restartPCB = findPCBbyProcessID(PID_restart);
//if PCB found, terminate itself and create a new one
if (restartPCB != NULL){
TerminateProcess(restartPCB);
recreatedPCB = OSCreateProcess(restartPCB->ProcessName, restartPCB->TestToRun,
restartPCB->Priority, SystemCallData->Argument[1], SystemCallData->Argument[2]);
//if create successfully, put it into PCB table and ready queue
if (recreatedPCB != NULL) {
*SystemCallData->Argument[2] = ERR_SUCCESS;
SchedularPrinter("Create", recreatedPCB->ProcessID);//print states
enPCBTable(recreatedPCB);
enReadyQueue(recreatedPCB);
SchedularPrinter("Restart", restartPCB->ProcessID);
}
}
else{
*SystemCallData->Argument[2] = ERR_BAD_PARAM;
}
}
else{
*SystemCallData->Argument[2] = ERR_BAD_PARAM;
}
break;
//terminate a process
case SYSNUM_TERMINATE_PROCESS:
termPID = (long)SystemCallData->Argument[0];
//if PID = -1, terminate current running PCB
if (termPID == -1) {
if (PCBLiveNumber() > 1) {
*SystemCallData->Argument[1] = ERR_SUCCESS;
//print states
SchedularPrinter("Terminate", termPID);
//terminate current PCB
TerminateProcess(CurrentPCB());
}
else {
*SystemCallData->Argument[1] = ERR_SUCCESS;
HaltProcess();
}
}
//if PID = -2, terminate OS
if (termPID == -2) {
*SystemCallData->Argument[1] = ERR_SUCCESS;
HaltProcess();
}
//if PID positive, terminate specified PID
else {
termPCB = findPCBbyProcessID((long)SystemCallData->Argument[0]);
//if PCB found, terminate it
if (termPCB != NULL) {
*SystemCallData->Argument[1] = ERR_SUCCESS;
//if more than one PCB alive, simply terminate it
if (PCBLiveNumber() > 1) {
//print states
SchedularPrinter("Terminate", termPID);
//terminate specified PCB
TerminateProcess(termPCB);
}
//if last alive PCB, terminate OS
else {
HaltProcess();
}
}
else {
*SystemCallData->Argument[1] = ERR_BAD_PARAM;
}
}
break;
//suspend a PCB, which can be resumed
case SYSNUM_SUSPEND_PROCESS:
suspendPID = (int)SystemCallData->Argument[0];
//if PID = -1, suspend current running PCB
if (suspendPID == -1) {
//if more than one PCB alive, suspend it
if (PCBLiveNumber() > 1) {
*SystemCallData->Argument[1] = ERR_SUCCESS;
//print states
SchedularPrinter("Suspend", suspendPID);
//Suspend Current Process
SuspendProcess(CurrentPCB());
}
//if last one PCB alive, return error
else {
*SystemCallData->Argument[1] = ERR_BAD_PARAM;
}
}
//if PID positive, suspend specified PCB
else {
suspendPCB = findPCBbyProcessID((int)suspendPID);
//if PCB found
if (suspendPCB != NULL) {
//if more than one PCB alive, suspend it
if (suspendPCB->ProcessState == PCB_STATE_LIVE && PCBLiveNumber() > 1) {
*SystemCallData->Argument[1] = ERR_SUCCESS;
//print states
SchedularPrinter("Suspend", suspendPID);
//Suspend specified process
SuspendProcess(suspendPCB);
}
//if last one PCB alive, return error
else {
*SystemCallData->Argument[1] = ERR_BAD_PARAM;
}
}
else {
*SystemCallData->Argument[1] = ERR_BAD_PARAM;
}
}
break;
//resumes a previously suspended PCB
case SYSNUM_RESUME_PROCESS:
resumePID = (int)SystemCallData->Argument[0];
resumePCB = findPCBbyProcessID(resumePID);
//if PCB found
if (resumePCB != NULL) {
//if PCB is previously suspended
if (resumePCB->ProcessState == PCB_STATE_SUSPEND) {
*SystemCallData->Argument[1] = ERR_SUCCESS;
//print states
SchedularPrinter("Resume", resumePID);
//Resume specified process
ResumeProcess(resumePCB);
}
else {
*SystemCallData->Argument[1] = ERR_BAD_PARAM;
}
}
else {
*SystemCallData->Argument[1] = ERR_BAD_PARAM;
}
break;
//change the priority of a PCB
case SYSNUM_CHANGE_PRIORITY:
changePrioPID = (int)SystemCallData->Argument[0];
changePrioPCB = findPCBbyProcessID((int)changePrioPID);
newPriority = (int)SystemCallData->Argument[1];
//if legal priority
if (newPriority<=40 && newPriority>=0) {
if (changePrioPCB != NULL) {
*SystemCallData->Argument[2] = ERR_SUCCESS;
//print states
printf("Before changing Priority\n");
SchedularPrinter("ChangePrio", changePrioPID);
//if PCB in ready queue, change order in ready queue
if (changePrioPCB->ProcessLocation == PCB_LOCATION_READY_QUEUE
&& newPriority != changePrioPCB->Priority) {
changePrioPCB = deCertainPCBFromReadyQueue(changePrioPID);
changePrioPCB->Priority = newPriority;
enReadyQueue(changePrioPCB);
}
else {
changePrioPCB->Priority = newPriority;
}
//print states
printf("After changing Priority\n");
SchedularPrinter("ChangePrio", changePrioPID);
}
else {
*SystemCallData->Argument[2] = ERR_BAD_PARAM;
}
}
else {
*SystemCallData->Argument[2] = ERR_BAD_PARAM;
}
break;
//PCB stores a message in message table
case SYSNUM_SEND_MESSAGE:
TargetPID = (long)SystemCallData->Argument[0];
MessageBuffer = (char*)SystemCallData->Argument[1];
SendLength = (long)SystemCallData->Argument[2];
ErrorReturned_SendMessage = SystemCallData->Argument[3];
//create a message
MessageCreated = CreateMessage(TargetPID, MessageBuffer,
SendLength, ErrorReturned_SendMessage);
//if successfully create a message, put it into message table
if (MessageCreated != NULL) {
SchedularPrinter("SendMsg", TargetPID);
enMessageTable(MessageCreated);
}
break;
//retrive a message in message table
case SYSNUM_RECEIVE_MESSAGE:
SourcePID = (long)SystemCallData->Argument[0];
ReceiveBuffer = (char*)SystemCallData->Argument[1];
ReceiveLength = (long)SystemCallData->Argument[2];
ActualSendLength = SystemCallData->Argument[3];
ActualSourcePID = SystemCallData->Argument[4];
ErrorReturned_ReceiveMessage = SystemCallData->Argument[5];
Mess_PCB = CurrentPCB();
Mess_PCB->ProcessState = PCB_STATE_MSG_SUSPEND;
pcbTable->Msg_Suspended_Number += 1;
//PCB kept suspended by sleep until find a message
while (findMessage(SourcePID, ReceiveBuffer, ReceiveLength,
ActualSendLength, ActualSourcePID, ErrorReturned_ReceiveMessage) == 0) {
Mess_PCB->WakeUpTime = CurrentTime() + 10;
//Put current running PCB into timer queue and reset time
enTimerQueue(Mess_PCB);
if (Mess_PCB == timerQueue->First_Element->PCB) {
SetTimer(10);
}
//first PCB in Ready Queue starts
Dispatcher();
}
Mess_PCB->ProcessState = PCB_STATE_LIVE;
pcbTable->Msg_Suspended_Number -= 1;
SchedularPrinter("ReceiveMsg", CurrentPID());
break;
default:
printf("ERROR! call_type not recognized!\n");
printf("Call_type is - %i\n", call_type);
}
} // End of svc
void osInit(int argc, char *argv[]) {
INT32 i;
MEMORY_MAPPED_IO mmio;
long a;
long b;
long* arg0=(long*)"test2a"; //default ruuning test
long* arg1=(long*)test2a;
long* arg2=(long*)10;
long* arg3=& a;
long* arg4=& b;
// Demonstrates how calling arguments are passed thru to here
printf( "Program called with %d arguments:", argc );
for ( i = 0; i < argc; i++ )
printf( " %s", argv[i] );
printf( "\n" );
printf( "Calling with argument 'sample' executes the sample program.\n" );
// Here we check if a second argument is present on the command line.
// If so, run in multiprocessor mode
if ( argc > 2 ){
printf("Simulation is running as a MultProcessor\n\n");
mmio.Mode = Z502SetProcessorNumber;
mmio.Field1 = MAX_NUMBER_OF_PROCESSORS;
mmio.Field2 = (long) 0;
mmio.Field3 = (long) 0;
mmio.Field4 = (long) 0;
MEM_WRITE(Z502Processor, &mmio); // Set the number of processors
}
else {
printf("Simulation is running as a UniProcessor\n");
printf("Add an 'M' to the command line to invoke multiprocessor operation.\n\n");
}
// Setup so handlers will come to code in base.c
TO_VECTOR[TO_VECTOR_INT_HANDLER_ADDR ] = (void *) InterruptHandler;
TO_VECTOR[TO_VECTOR_FAULT_HANDLER_ADDR ] = (void *) FaultHandler;
TO_VECTOR[TO_VECTOR_TRAP_HANDLER_ADDR ] = (void *) svc;
if((argc > 1) && (strcmp(argv[1], "test1a") == 0)){
arg0=(long*)"test1a";
arg1=(long*)test1a;
OSCreateProcess(arg0,arg1,arg2,arg3,arg4);
Dispatcher();
}
if((argc > 1) && (strcmp(argv[1], "test1b") == 0)){
arg0=(long*)"test1b";
arg1=(long*)test1b;
OSCreateProcess(arg0,arg1,arg2,arg3,arg4);
Dispatcher();
}
if((argc > 1) && (strcmp(argv[1], "test1c") == 0)){
arg0=(long*)"test1c";
arg1=(long*)test1c;
OSCreateProcess(arg0,arg1,arg2,arg3,arg4);
Dispatcher();
}
if((argc > 1) && (strcmp(argv[1], "test1d") == 0)){
arg0=(long*)"test1d";
arg1=(long*)test1d;
OSCreateProcess(arg0,arg1,arg2,arg3,arg4);
Dispatcher();
}
if((argc > 1) && (strcmp(argv[1], "test1e") == 0)){
arg0=(long*)"test1e";
arg1=(long*)test1e;
OSCreateProcess(arg0,arg1,arg2,arg3,arg4);
Dispatcher();
}
if((argc > 1) && (strcmp(argv[1], "test1f") == 0)){
arg0=(long*)"test1f";
arg1=(long*)test1f;
OSCreateProcess(arg0,arg1,arg2,arg3,arg4);
Dispatcher();
}
if((argc > 1) && (strcmp(argv[1], "test1g") == 0)){
arg0=(long*)"test1g";
arg1=(long*)test1g;
OSCreateProcess(arg0,arg1,arg2,arg3,arg4);
Dispatcher();
}
if((argc > 1) && (strcmp(argv[1], "test1h") == 0)){
arg0=(long*)"test1h";
arg1=(long*)test1h;
OSCreateProcess(arg0,arg1,arg2,arg3,arg4);
Dispatcher();
}
if((argc > 1) && (strcmp(argv[1], "test1i") == 0)){
arg0=(long*)"test1i";
arg1=(long*)test1i;
OSCreateProcess(arg0,arg1,arg2,arg3,arg4);
Dispatcher();
}
if((argc > 1) && (strcmp(argv[1], "test1j") == 0)){
arg0=(long*)"test1j";
arg1=(long*)test1j;
OSCreateProcess(arg0,arg1,arg2,arg3,arg4);
Dispatcher();
}
if((argc > 1) && (strcmp(argv[1], "test1k") == 0)){
arg0=(long*)"test1k";
arg1=(long*)test1k;
OSCreateProcess(arg0,arg1,arg2,arg3,arg4);
Dispatcher();
}
/*project2*/
if((argc > 1) && (strcmp(argv[1], "test2a") == 0)){
arg0=(long*)"test2a";
arg1=(long*)test2a;
OSCreateProcess(arg0,arg1,arg2,arg3,arg4);
Dispatcher();
}
if((argc > 1) && (strcmp(argv[1], "test2b") == 0)){
arg0=(long*)"test2b";
arg1=(long*)test2b;
OSCreateProcess(arg0,arg1,arg2,arg3,arg4);
Dispatcher();
}
if((argc > 1) && (strcmp(argv[1], "test2c") == 0)){
arg0=(long*)"test2c";
arg1=(long*)test2c;
OSCreateProcess(arg0,arg1,arg2,arg3,arg4);
Dispatcher();
}
if((argc > 1) && (strcmp(argv[1], "test2d") == 0)){
arg0=(long*)"test2d";
arg1=(long*)test2d;
OSCreateProcess(arg0,arg1,arg2,arg3,arg4);
Dispatcher();
}
if((argc > 1) && (strcmp(argv[1], "test2e") == 0)){
arg0=(long*)"test2e";
arg1=(long*)test2e;
OSCreateProcess(arg0,arg1,arg2,arg3,arg4);
Dispatcher();
}
if((argc > 1) && (strcmp(argv[1], "test2f") == 0)){
arg0=(long*)"test2f";
arg1=(long*)test2f;
OSCreateProcess(arg0,arg1,arg2,arg3,arg4);
Dispatcher();
}
if((argc > 1) && (strcmp(argv[1], "test2g") == 0)){
arg0=(long*)"test2g";
arg1=(long*)test2g;
OSCreateProcess(arg0,arg1,arg2,arg3,arg4);
Dispatcher();
}
if((argc > 1) && (strcmp(argv[1], "test2h") == 0)){
arg0=(long*)"test2h";
arg1=(long*)test2h;
OSCreateProcess(arg0,arg1,arg2,arg3,arg4);
Dispatcher();
}
else{
OSCreateProcess(arg0,arg1,arg2,arg3,arg4);
Dispatcher();
}
} // End of osInit
void svc(SYSTEM_CALL_DATA *SystemCallData) {
MEMORY_MAPPED_IO mmio;
short call_type;
static short do_print = 10;
INT32 Time;
INT32 Status;
short i;
long* arg0=SystemCallData->Argument[0];
long* arg1=SystemCallData->Argument[1];
long* arg2=SystemCallData->Argument[2];
long* arg3=SystemCallData->Argument[3];
long* arg4=SystemCallData->Argument[4];
long *arg5=SystemCallData->Argument[5];
call_type = (short) SystemCallData->SystemCallNumber;
if (do_print > 0) {
printf("SVC handler: %s\n", call_names[call_type]);
for (i = 0; i < SystemCallData->NumberOfArguments - 1; i++) {
printf("Arg %d: Contents = (Decimal) %8ld, (Hex) %8lX\n", i,
(unsigned long) SystemCallData->Argument[i],
(unsigned long) SystemCallData->Argument[i]);
}
do_print--;
}
switch (call_type) {
// Get time service call
case SYSNUM_GET_TIME_OF_DAY:
mmio.Mode = Z502ReturnValue;
mmio.Field1 = mmio.Field2 = mmio.Field3 = 0;
MEM_READ(Z502Clock, &mmio);//hardware call
Time = mmio.Field1;
(SystemCallData->Argument[0])=(long*)&Time;
//statePrinter(call_type,arg0, arg1, arg2, arg3, arg4);
break;
// get the Timer start and generate idle.
case SYSNUM_SLEEP:
startTimer(arg0);
//statePrinter(call_type,arg0, arg1, arg2, arg3, arg4);
Dispatcher();//call dispatcher
break;
// create process
case SYSNUM_CREATE_PROCESS:
OSCreateProcess(arg0,arg1,arg2,arg3,arg4);
//statePrinter(call_type,arg0, arg1, arg2, arg3, arg4);
break;
// get process id
case SYSNUM_GET_PROCESS_ID:
getProcessID(arg0,arg1,arg2);
//statePrinter(call_type,arg0, arg1, arg2, arg3, arg4);
break;
// suspend process
case SYSNUM_SUSPEND_PROCESS:
suspendProcess(arg0, arg1);
//statePrinter(call_type,arg0, arg1, arg2, arg3, arg4);
break;
// resume the process
case SYSNUM_RESUME_PROCESS:
resumeProcess(arg0, arg1);
//statePrinter(call_type,arg0, arg1, arg2, arg3, arg4);
break;
// change priority;
case SYSNUM_CHANGE_PRIORITY:
changePriority(arg0,arg1,arg2);
//statePrinter(call_type,arg0, arg1, arg2, arg3, arg4);
break;
// terminate system call
case SYSNUM_TERMINATE_PROCESS:
terminateSysProcess(arg0,arg1);
break;
case SYSNUM_SEND_MESSAGE:
Send_message(arg0, arg1, arg2, arg3);
break;
case SYSNUM_RECEIVE_MESSAGE:
ReceiveMessage(arg0, arg1, arg2, arg3, arg4, arg5);
break;
case SYSNUM_DISK_WRITE:
DiskWrite(arg0, arg1, arg2);
break;
case SYSNUM_DISK_READ:
DiskRead(arg0, arg1, arg2);
break;
case SYSNUM_DEFINE_SHARED_AREA:
DefineSharedArea(arg0, arg1, arg2,arg3,arg4);
break;
default:
printf( "ERROR! call_type not recognized!\n" );
printf( "Call_type is - %i\n", call_type);
}
} // End of svc
