unsigned char floppy_read(unsigned short port)
{
int counter=0;
unsigned char in=0;
while(((inb(FP_MAIN_STATUS_REGISTER) & 0x80)==0))
{
if(counter>=90)
{
kprint("\nFloppy Lesezugriff Zeitueberschreitung\n");
break;
}
counter++;
timerSleep(10);
}
//kprint("\nFloppy Daten gelesen\n");
timerSleep(1);
waitIO();
in=inb(FP_DATA_FIFO);
waitIO();
return in;
}
/**
@brief This function handles a system call request coming from a process running in Kernel Mode.
@return Void.
*/
HIDDEN void syscallKernelMode()
{
/* Identify and handle the system call */
switch (SYSBP_Old->a1)
{
case CREATEPROCESS:
CurrentProcess->p_s.a1 = createProcess((state_t *) SYSBP_Old->a2);
break;
case TERMINATEPROCESS:
terminateProcess();
break;
case VERHOGEN:
verhogen((int *) SYSBP_Old->a2);
break;
case PASSEREN:
passeren((int *) SYSBP_Old->a2);
break;
case GETCPUTIME:
CurrentProcess->p_s.a1 = getCPUTime();
break;
case WAITCLOCK:
waitClock();
break;
case WAITIO:
CurrentProcess->p_s.a1 = waitIO((int) SYSBP_Old->a2, (int) SYSBP_Old->a3, (int) SYSBP_Old->a4);
break;
case SPECTRAPVEC:
specTrapVec((int) SYSBP_Old->a2, (state_t *) SYSBP_Old->a3, (state_t *) SYSBP_Old->a4);
break;
default:
/* Distinguish whether SYS5 has been invoked or not */
checkSYS5(SYSBK_EXCEPTION, SYSBP_Old);
}
/* Call the scheduler */
scheduler();
}
void floppy_out(char cmd)
{
int counter=0;
while(((inb(FP_MAIN_STATUS_REGISTER) & 0x80)==0))
{
if(counter>=90)
{
kprint("\nFloppy Schreibzugriff Zeitueberschreitung\n");
break;
}
counter++;
timerSleep(10);
}
//kprint("\nFloppy Daten geschrieben\n");
outb(FP_DATA_FIFO, cmd);
waitIO();
}
