/*------------------------------------------------------------------------
*
* sysinit - Initialize all Xinu data structures and devices
*
*------------------------------------------------------------------------
*/
static void sysinit()
{
int32 i;
struct procent *prptr; /* Ptr to process table entry */
struct sentry *semptr; /* Ptr to semaphore table entry */
/* Platform Specific Initialization */
platinit();
/* kprintf("\033[39;49m\n\r%s\n\n\r", VERSION);*/
/* Initialize the interrupt vectors */
initevec();
/* Initialize free memory list */
meminit();
/* Initialize system variables */
/* Count the Null process as the first process in the system */
prcount = 1;
/* Scheduling is not currently blocked */
Defer.ndefers = 0;
/* Initialize process table entries free */
for (i = 0; i < NPROC; i++) {
prptr = &proctab[i];
prptr->prstate = PR_FREE;
prptr->prname[0] = NULLCH;
prptr->prstkbase = NULL;
prptr->prprio = 0;
}
/* Initialize the Null process entry */
prptr = &proctab[NULLPROC];
prptr->prstate = PR_CURR;
prptr->prprio = 0;
strncpy(prptr->prname, "prnull", 7);
prptr->prstkbase = getstk(NULLSTK);
prptr->prstklen = NULLSTK;
prptr->prstkptr = 0;
currpid = NULLPROC;
/* Initialize semaphores */
for (i = 0; i < NSEM; i++) {
semptr = &semtab[i];
semptr->sstate = S_FREE;
semptr->scount = 0;
semptr->squeue = newqueue();
}
/* Initialize buffer pools */
bufinit();
/* Create a ready list for processes */
readylist = newqueue();
/* Initialize the real time clock */
clkinit();
for (i = 0; i < NDEVS; i++) {
init(i);
}
return;
}
/*------------------------------------------------------------------------
*
* sysinit - Initialize all Xinu data structures and devices
*
*------------------------------------------------------------------------
*/
static void sysinit()
{
int32 i;
struct procent *prptr; /* Ptr to process table entry */
struct sentry *semptr; /* Ptr to semaphore table entry */
/* Platform Specific Initialization */
platinit();
/* Initialize the interrupt vectors */
initevec();
/* Initialize free memory list */
meminit();
/* Initialize system variables */
/* Count the Null process as the first process in the system */
prcount = 1;
/* Scheduling is not currently blocked */
Defer.ndefers = 0;
/* Initialize process table entries free */
for (i = 0; i < NPROC; i++) {
prptr = &proctab[i];
prptr->prstate = PR_FREE;
prptr->prname[0] = NULLCH;
prptr->prstkbase = NULL;
prptr->prprio = 0;
prptr->prcpu_wait_ratio = 0; // Initializing waits at creation for each process to 0
}
/* Initialize the Null process entry */
prptr = &proctab[NULLPROC];
prptr->prstate = PR_CURR;
/* Setting the null process initial priority as the highest so that all other processes can run before it*/
prptr->initprio = MAXKEY;
prptr->prcpumsec = 0;
prptr->prctxswintime = 0;
/* Reversing the priority order in case of Dynamic Process Scheduling (Q4 and Q5.) */
if (LAB2COND) {
prptr->prprio = MAXKEY;// prptr->initprio + prptr->prcpumsec; //Highest int16 value. The Null process must take the lowest priority.
}
else {
prptr->prprio = MINPRIO;
}
strncpy(prptr->prname, "prnull", 7);
prptr->prstkbase = getstk(NULLSTK);
prptr->prstklen = NULLSTK;
prptr->prstkptr = 0;
currpid = NULLPROC;
/* Initialize semaphores */
for (i = 0; i < NSEM; i++) {
semptr = &semtab[i];
semptr->sstate = S_FREE;
semptr->scount = 0;
semptr->squeue = newqueue();
}
/* Initialize buffer pools */
bufinit();
/* Create a ready list for processes */
readylist = newqueue();
initialize_mltfbq();
init_recieverq();
/* Initialize the real time clock */
clkinit();
for (i = 0; i < NDEVS; i++) {
init(i);
}
return;
}
