/* Initialize a dde26 thread.
*
* - Allocate thread data, as well as a Linux task struct,
* - Fill in default values for thread_info, and task,
* - Adapt task struct's thread_info backreference
* - Initialize the DDE sleep lock
*/
static dde26_thread_data *init_dde26_thread(void)
{
/*
* Virtual PID counter
*/
static atomic_t pid_counter = ATOMIC_INIT(0);
dde26_thread_data *t = vmalloc(sizeof(dde26_thread_data));
Assert(t);
memcpy(&t->_vpid, &init_struct_pid, sizeof(struct pid));
t->_vpid.numbers[0].nr = atomic_inc_return(&pid_counter);
memcpy(&LX_THREAD(t), &init_thread, sizeof(struct thread_info));
LX_TASK(t) = vmalloc(sizeof(struct task_struct));
Assert(LX_TASK(t));
memcpy(LX_TASK(t), &init_task, sizeof(struct task_struct));
/* nice: Linux backreferences a task`s thread_info from the
* task struct (which in turn can be found using the
* thread_info...) */
LX_TASK(t)->stack = &LX_THREAD(t);
/* initialize this thread's sleep lock */
SLEEP_LOCK(t) = ddekit_sem_init(0);
return t;
}
/*****************************************************************************
* ddekit_minix_create_msg_q *
****************************************************************************/
struct ddekit_minix_msg_q *
ddekit_minix_create_msg_q(unsigned from, unsigned to)
{
struct ddekit_minix_msg_q *mq = (struct ddekit_minix_msg_q *)
ddekit_simple_malloc(sizeof(struct ddekit_minix_msg_q));
mq->from = from;
mq->to = to;
mq->msg_w_pos = 0;
mq->msg_r_pos = 0;
mq->msg_r_sem = ddekit_sem_init(0);
mq->msg_w_sem = ddekit_sem_init(MESSAGE_QUEUE_SIZE);
/* TODO: check for overlapping message ranges */
mq->next = _list;
_list = mq;
DDEBUG_MSG_VERBOSE("created msg_q from %x to %x\n", from , to);
return mq;
}
/*****************************************************************************
* ddekit_init_timers *
****************************************************************************/
void ddekit_init_timers(void)
{
static int first_time=0;
if (!first_time)
{
ddekit_lock_init(&lock);
jiffies = get_current_clock();
HZ = sys_hz();
pending_timer_ints = ddekit_sem_init(0);
th = ddekit_thread_create(ddekit_timer_thread, 0, "timer");
first_time=1;
DDEBUG_MSG_INFO("DDEkit timer subsustem initialized");
}
}
PUBLIC void ddekit_init(void)
{
sef_startup();
ddekit_pgtab_init();
ddekit_init_threads();
ddekit_init_irqs();
ddekit_init_timers();
ddekit_dispatcher_thread_init();
exit_sem = ddekit_sem_init(0);
}
/** Initialize softirq subsystem.
*
* Start NUM_SOFTIRQ_THREADS threads executing the \ref l4dde26_softirq_thread
* function.
*/
void l4dde26_softirq_init(void)
{
char name[20];
dde_softirq_sem = ddekit_sem_init(0);
set_softirq_pending(0);
ddekit_lock_init_unlocked(&tasklet_vec.lock);
ddekit_lock_init_unlocked(&tasklet_hi_vec.lock);
snprintf(name, 20, ".softirqd");
dde_softirq_thread = ddekit_thread_create(
l4dde26_softirq_thread,
NULL, name, 0);
open_softirq(TASKLET_SOFTIRQ, tasklet_action);
open_softirq(HI_SOFTIRQ, tasklet_hi_action);
INITIALIZE_INITVAR(dde26_softirq);
}
