/*
* Thread initialization.
*/
struct thread *
thread_bootstrap(void)
{
struct thread *me;
/* Create the data structures we need. */
sleepers = array_create();
if (sleepers==NULL) {
panic("Cannot create sleepers array\n");
}
zombies = array_create();
if (zombies==NULL) {
panic("Cannot create zombies array\n");
}
/*
* Create the thread structure for the first thread
* (the one that's already running)
*/
me = thread_create("<boot/menu>");
if (me==NULL) {
panic("thread_bootstrap: Out of memory\n");
}
/*
* Leave me->t_stack NULL. This means we're using the boot stack,
* which can't be freed.
*/
/* Initialize the first thread's pcb */
md_initpcb0(&me->t_pcb);
/* Set curthread */
curthread = me;
pid_bootstrap();
/* Number of threads starts at 1 */
numthreads = 1;
/* Done */
return me;
}
/*
* Initial boot sequence.
*/
static
void
boot(void)
{
/*
* The order of these is important!
* Don't go changing it without thinking about the consequences.
*
* Among other things, be aware that console output gets
* buffered up at first and does not actually appear until
* mainbus_bootstrap() attaches the console device. This can
* be remarkably confusing if a bug occurs at this point. So
* don't put new code before mainbus_bootstrap if you don't
* absolutely have to.
*
* Also note that the buffer for this is only 1k. If you
* overflow it, the system will crash without printing
* anything at all. You can make it larger though (it's in
* dev/generic/console.c).
*/
kprintf("\n");
kprintf("OS/161 base system version %s\n", BASE_VERSION);
kprintf("%s", harvard_copyright);
kprintf("\n");
kprintf("Put-your-group-name-here's system version %s (%s #%d)\n",
GROUP_VERSION, buildconfig, buildversion);
kprintf("\n");
/* Early initialization. */
ram_bootstrap();
vm_bootstrap();
thread_bootstrap();
hardclock_bootstrap();
vfs_bootstrap();
/* Probe and initialize devices. Interrupts should come on. */
kprintf("Device probe...\n");
KASSERT(curthread->t_curspl > 0);
mainbus_bootstrap();
KASSERT(curthread->t_curspl == 0);
/* Now do pseudo-devices. */
pseudoconfig();
kprintf("\n");
/* Late phase of initialization. */
/* BEGIN A3 SETUP */
#if !OPT_DUMBVM
swap_bootstrap(); /* New for ASST3 - initialize swap system */
#endif
/* END A3 SETUP */
kprintf_bootstrap();
/* New for ASST2 - Initialize process ID managment. This should
* come before additional cpus are brought online.
*/
pid_bootstrap();
dumb_consoleIO_bootstrap(); /* And initialize for user console IO */
thread_start_cpus();
/* Default bootfs - but ignore failure, in case emu0 doesn't exist */
vfs_setbootfs("emu0");
/*
* Make sure various things aren't screwed up.
*/
COMPILE_ASSERT(sizeof(userptr_t) == sizeof(char *));
COMPILE_ASSERT(sizeof(*(userptr_t)0) == sizeof(char));
}
/*
* Initial boot sequence.
*/
static
void
boot(void)
{
/*
* The order of these is important!
* Don't go changing it without thinking about the consequences.
*
* Among other things, be aware that console output gets
* buffered up at first and does not actually appear until
* dev_bootstrap() attaches the console device. This can be
* remarkably confusing if a bug occurs at this point. So
* don't put new code before dev_bootstrap if you don't
* absolutely have to.
*
* Also note that the buffer for this is only 1k. If you
* overflow it, the system will crash without printing
* anything at all. You can make it larger though (it's in
* dev/generic/console.c).
*/
/* remove compiler warning */
//size_t memsize; /* ASST2: get memsize from new vm_bootstrap */
kprintf("\n");
kprintf("OS/161 base system version %s\n", BASE_VERSION);
kprintf("%s", harvard_copyright);
kprintf("\n");
kprintf("Group 36 system version %s (%s #%d)\n",
GROUP_VERSION, buildconfig, buildversion);
kprintf("\n");
ram_bootstrap();
#if OPT_DUMBVM
vm_bootstrap();
#else
memsize = vm_bootstrap(); /* ASST2: get memsize from new vm_bootstrap */
#endif
scheduler_bootstrap();
pid_bootstrap(); /* ASST1: initialize pid management before threads */
thread_bootstrap();
vfs_bootstrap();
dev_bootstrap();
#if !OPT_DUMBVM /* only initialize swap if not using dumbvm */
swap_bootstrap(memsize); /* ASST2: initialize swap file after devices */
#endif
kprintf_bootstrap();
// DEMKE: ASST1 - initialize user program console I/O
//dumb_consoleIO_bootstrap();
/* Default bootfs - but ignore failure, in case emu0 doesn't exist */
vfs_setbootfs("emu0");
/*
* Make sure various things aren't screwed up.
*/
assert(sizeof(userptr_t)==sizeof(char *));
assert(sizeof(*(userptr_t)0)==sizeof(char));
}
