int main()
{
pcb_t *init;
int i;
/* Populate the processor state areas into the ROM Reserved Frame */
populateArea(SYSBK_NEWAREA, (memaddr) sysBpHandler); /* SYS/BP Exception Handling */
populateArea(PGMTRAP_NEWAREA, (memaddr) pgmTrapHandler); /* PgmTrap Exception Handling */
populateArea(INT_NEWAREA, (memaddr) intHandler); /* Interrupt Exception Handling */
populateArea(TLB_NEWAREA, (memaddr) tlbHandler); /* TLB Exception Handling */
/* Initialize data structures */
initPcbs();
initASL();
/* Initialize global variables */
ReadyQueue = mkEmptyProcQ();
CurrentProcess = NULL;
ProcessCount = SoftBlockCount = TimerTick = PseudoClock = 0;
/* Initialize device semaphores */
for (i = 0; i < DEV_PER_INT; i++)
Semaphore.disk[i] =
Semaphore.tape[i] =
Semaphore.network[i] =
Semaphore.printer[i] =
Semaphore.terminalR[i] =
Semaphore.terminalT[i] = 0;
/* Initialize init method */
if (!(init = allocPcb()))
PANIC(); /* Anomaly */
/* Enable interrupts; enable Kernel-Mode; disable Virtual Memory */
init->p_s.CP15_Control &= ~(0x1);
init->p_s.cpsr = STATUS_SYS_MODE | STATUS_ALL_INT_ENABLE(init->p_s.cpsr);
/* Initialize Stack Pointer */
init->p_s.sp = RAM_TOP - BUS_REG_RAM_SIZE;
/* Initialize Program Counter with the test process */
init->p_s.pc = (memaddr) test;
/* Insert init in ProcQ */
insertProcQ(&ReadyQueue, init);
/* Initialize Process Id */
ProcessCount++;
/* Start the timer tick */
StartTimerTick = getTODLO();
/* Call the scheduler */
scheduler();
/* Anomaly */
PANIC();
return 0;
}
int main() {
int i,j;
/* Setting up CPU0 new areas in ROM. */
populateArea((state_t *)INT_NEWAREA,(memaddr)intHandler,0);
populateArea((state_t *)TLB_NEWAREA,(memaddr)tlbHandler,0);
populateArea((state_t *)PGMTRAP_NEWAREA,(memaddr)trapHandler,0);
populateArea((state_t *)SYSBK_NEWAREA,(memaddr)sysHandler,0);
/* Setting up CPU-n (with n >= 1) new areas in RAM, in a defined array of state_t pointers. */
for (i = 1; i < NUM_CPU; i++)
for (j = 0; j < 4; j++)
switch (j) {
case 0: populateArea(&new_old_areas[i][1],(memaddr)intHandler,i); break;
case 1: populateArea(&new_old_areas[i][3],(memaddr)tlbHandler,i); break;
case 2: populateArea(&new_old_areas[i][5],(memaddr)trapHandler,i); break;
case 3: populateArea(&new_old_areas[i][7],(memaddr)sysHandler,i); break;
}
/* Initialization of underlaying data structures. */
initPcbs();
initASL();
/* Inizialization of device semaphores. TODO */
if ((psClock_timer = getSemd(0)) != NULL)
psClock_timer -> s_value = 0;
if ((terminalWrite = getSemd(1)) != NULL)
terminalWrite -> s_value = 0;
if ((terminalRead = getSemd(2)) != NULL)
terminalRead -> s_value = 0;
/* Scheduler initialization process. */
initScheduler(i);
return 1;
}
