void KernelMain(TF_t *TF_ptr) { int new_pid; pcb[running_pid].TF_ptr = TF_ptr; switch(TF_ptr ->intr_id) { case(TIMER_INTR): TimerISR(); OS_clock++; checkWait(); outportb(0x20, 0x60); //stops the timer pic with a code break; case(SLEEP_INTR): Sleep_ISR(TF_ptr->eax); break; case(GETPID_INTR): TF_ptr->eax = running_pid; break; case(STARTPROC_INTR): new_pid = DeQ(&free_q); StartProcISR(new_pid,TF_ptr->eax); break; case(SEMWAIT_INTR): SemWaitISR(TF_ptr->eax); break; case(SEMPOST_INTR): SemPostISR(TF_ptr->eax); break; case(SEMGET_INTR): SemGetISR(TF_ptr->eax); break; case(MSGSND_INTR): MsgSndISR(TF_ptr->eax); break; case(MSGRCV_INTR): MsgRcvISR(TF_ptr->eax); break; default: cons_printf("Panic: unknown intr ID (%d)!\n",TF_ptr->intr_id); breakpoint(); } Scheduler(); LoadRun(pcb[running_pid].TF_ptr); }
void KernelMain(TF_t *TF_ptr) { int new_pid, i, pid, len; pcb[running_pid].TF_ptr = TF_ptr; //save TF_ptr to PCB of running process switch(TF_ptr->intr_id) //switch on TF_ptr->intr_id { case TIMER_INTR: TimerISR(); //call TimerISR() outportb(0x20, 0x60); //dismiss timer event: send PIC with a code OS_clock++; len = sleep_q.len; for(i = 0; i < len; i++) { pid = DeQ(&sleep_q); if(OS_clock == pcb[pid].wake_time) { EnQ(pid, &ready_q); pcb[pid].state = READY; } else { EnQ(pid, &sleep_q); } } break; case GETPID_INTR: GetPidISR(); break; case SLEEP_INTR: SleepISR(); break; //phase 3 new switch() cases case STARTPROC_INTR: new_pid = DeQ(&free_q); //dequeue free_q for a new pid if (new_pid == -1) //indicates no ID left { cons_printf("Panic: no more available process ID left!\n"); //show msg on target PC } else { StartProcISR(new_pid, TF_ptr->eax);//create new proc } break; case SEMGET_INTR: SemGetISR(TF_ptr->eax); break; case SEMWAIT_INTR: SemWaitISR(TF_ptr->eax); break; case SEMPOST_INTR: SemPostISR(TF_ptr->eax); break; //phase 4 case MSGSND_INTR: MsgSndISR(TF_ptr->eax); //Check if parameter needed********* break; case MSGRCV_INTR: MsgRcvISR(TF_ptr->eax); break; default: cons_printf("Panic: unknown intr ID (%d)!\n", TF_ptr->intr_id); breakpoint(); //fallback to GDB } Scheduler(); //call scheduler() to process to load/run if needed LoadRun(pcb[running_pid].TF_ptr); //call LoadRun(pcb[running_pid].TF_ptr) to load/run selected proc }