machine_remote_time.c [plain text]
#include <kern/misc_protos.h>
#include <machine/atomic.h>
#include <mach/mach_time.h>
#include <mach/clock_types.h>
#include <kern/clock.h>
#include <kern/locks.h>
#include <arm64/machine_remote_time.h>
#include <sys/kdebug.h>
#include <arm/machine_routines.h>
#include <kern/remote_time.h>
_Atomic uint32_t bt_init_flag = 0;
extern void mach_bridge_add_timestamp(uint64_t remote_timestamp, uint64_t local_timestamp);
extern void bt_calibration_thread_start(void);
extern void bt_params_add(struct bt_params *params);
void
mach_bridge_init_timestamp(void)
{
if (os_atomic_load(&bt_init_flag, relaxed)) {
return;
}
os_atomic_store(&bt_init_flag, 1, release);
bt_calibration_thread_start();
}
void
mach_bridge_recv_timestamps(uint64_t remoteTimestamp, uint64_t localTimestamp)
{
assert(ml_at_interrupt_context() == TRUE);
if (!os_atomic_load(&bt_init_flag, acquire)) {
panic("%s called before mach_bridge_init_timestamp", __func__);
return;
}
KDBG(MACHDBG_CODE(DBG_MACH_CLOCK, MACH_BRIDGE_RCV_TS), localTimestamp, remoteTimestamp);
lck_spin_lock(&bt_spin_lock);
mach_bridge_add_timestamp(remoteTimestamp, localTimestamp);
lck_spin_unlock(&bt_spin_lock);
return;
}
void
mach_bridge_set_params(uint64_t local_timestamp, uint64_t remote_timestamp, double rate)
{
if (!os_atomic_load(&bt_init_flag, acquire)) {
panic("%s called before mach_bridge_init_timestamp", __func__);
return;
}
struct bt_params params = {};
params.base_local_ts = local_timestamp;
params.base_remote_ts = remote_timestamp;
params.rate = rate;
lck_spin_lock(&bt_ts_conversion_lock);
bt_params_add(¶ms);
lck_spin_unlock(&bt_ts_conversion_lock);
KDBG(MACHDBG_CODE(DBG_MACH_CLOCK, MACH_BRIDGE_TS_PARAMS), params.base_local_ts,
params.base_remote_ts, *(uint64_t *)((void *)¶ms.rate));
}