void process_run(process_id_t pid)
{
context_t user_context;
thread_table_t *my_thread = thread_get_current_thread_entry();
/* If my process is a zombie, that means initialisation failed. */
if (process_table[pid].state == PROCESS_ZOMBIE) {
if (my_thread->pagetable) {
vm_destroy_pagetable(my_thread->pagetable);
my_thread->pagetable = NULL;
}
thread_finish();
}
process_set_pagetable(my_thread->pagetable);
my_thread->process_id = pid;
my_thread->pagetable = my_thread->pagetable;
/* Initialize the user context. (Status register is handled by
thread_goto_userland) */
memoryset(&user_context, 0, sizeof(user_context));
_context_set_ip(&user_context, process_table[pid].entry_point);
_context_set_sp(&user_context, process_table[pid].stack_top);
thread_goto_userland(&user_context);
}
/* Sets context for process */
void process_run(process_id_t pid) {
context_t user_context;
kprintf("vi er nu i process run\n");
process_set_pagetable(thread_get_thread_entry(thread_get_current_thread())->pagetable);
/* Initialize the user context. (Status register is handled by
thread_goto_userland) */
memoryset(&user_context, 0, sizeof(user_context));
_context_set_ip(&user_context, process_table[pid].entry_point);
_context_set_sp(&user_context, process_table[pid].stack_top);
kprintf("lige før thread goto");
thread_goto_userland(&user_context);
}
/** Initializes the threading system. Does this by setting all thread
* table entry states to THREAD_FREE. Called only once before any
* threads are created.
*/
void thread_table_init(void)
{
int i;
/* Thread table entry _must_ be 64 bytes long, because the
context switching code in kernel/cswitch.S expects that. Let's
make sure it is. If you hit this error, you have changed either
context_t or thread_table_t, but have not changed padding in
the end of thread_table_t definition in kernel/thread.h */
KERNEL_ASSERT(sizeof(thread_table_t) == 64);
spinlock_reset(&thread_table_slock);
/* Init all entries to 'NULL' */
for (i=0; i<CONFIG_MAX_THREADS; i++) {
/* Set context pointers to the top of the stack*/
thread_table[i].context = (context_t *) (thread_stack_areas
+CONFIG_THREAD_STACKSIZE*i + CONFIG_THREAD_STACKSIZE -
sizeof(context_t));
thread_table[i].user_context = NULL;
thread_table[i].state = THREAD_FREE;
thread_table[i].sleeps_on = 0;
thread_table[i].pagetable = NULL;
thread_table[i].attribs = 0;
thread_table[i].process_id = -1;
thread_table[i].next = -1;
}
/* Setup Idle Thread */
_context_set_ip(thread_table[IDLE_THREAD_TID].context,
(virtaddr_t)_idle_thread_wait_loop);
_context_set_sp(thread_table[IDLE_THREAD_TID].context,
(virtaddr_t) thread_stack_areas + CONFIG_THREAD_STACKSIZE - 4 -
sizeof(context_t));
_context_enable_ints(thread_table[IDLE_THREAD_TID].context);
thread_table[IDLE_THREAD_TID].state = THREAD_READY;
thread_table[IDLE_THREAD_TID].context->prev_context =
thread_table[IDLE_THREAD_TID].context;
}
