| 48,7 → 48,69 |
|---|
| #include <adt/list.h> |
| #include <atomic.h> |
| #include <proc/thread.h> |
| #include <sysinfo/sysinfo.h> |
| #include <arch/barrier.h> |
| |
| /* Pointers to public variables with time */ |
| struct ptime { |
| __native seconds; |
| __native useconds; |
| __native useconds2; |
| }; |
| struct ptime *public_time; |
| /* Variable holding fragment of second, so that we would update |
| * seconds correctly |
| */ |
| static __native secfrag = 0; |
| |
| /** Initialize realtime clock counter |
| * |
| * The applications (and sometimes kernel) need to access accurate |
| * information about realtime data. We allocate 1 page with these |
| * data and update it periodically. |
| * |
| * |
| */ |
| void clock_counter_init(void) |
| { |
| void *faddr; |
| |
| faddr = (void *)PFN2ADDR(frame_alloc(0, FRAME_ATOMIC)); |
| if (!faddr) |
| panic("Cannot allocate page for clock"); |
| |
| public_time = (struct ptime *)PA2KA(faddr); |
| |
| /* TODO: We would need some arch dependent settings here */ |
| public_time->seconds = 0; |
| public_time->useconds = 0; |
| |
| sysinfo_set_item_val("clock.faddr", NULL, (__native)faddr); |
| } |
| |
| |
| /** Update public counters |
| * |
| * Update it only on first processor |
| * TODO: Do we really need so many write barriers? |
| */ |
| static void clock_update_counters(void) |
| { |
| if (CPU->id == 0) { |
| secfrag += 1000000/HZ; |
| if (secfrag >= 1000000) { |
| public_time->useconds = 0; |
| write_barrier(); |
| public_time->seconds++; |
| secfrag = 0; |
| } else |
| public_time->useconds += 1000000/HZ; |
| write_barrier(); |
| public_time->useconds2 = public_time->useconds; |
| write_barrier(); |
| } |
| } |
| |
| /** Clock routine |
| * |
| * Clock routine executed from clock interrupt handler |
| 69,6 → 131,7 |
|---|
| * run all expired timeouts as you visit them. |
| */ |
| for (i = 0; i <= CPU->missed_clock_ticks; i++) { |
| clock_update_counters(); |
| spinlock_lock(&CPU->timeoutlock); |
| while ((l = CPU->timeout_active_head.next) != &CPU->timeout_active_head) { |
| h = list_get_instance(l, timeout_t, link); |