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28 #include <kern/misc_protos.h>
29 #include <machine/atomic.h>
30 #include <mach/mach_time.h>
31 #include <mach/clock_types.h>
32 #include <kern/clock.h>
33 #include <kern/locks.h>
34 #include <arm64/machine_remote_time.h>
35 #include <sys/kdebug.h>
36 #include <arm/machine_routines.h>
37 #include <kern/remote_time.h>
39 _Atomic
uint32_t bt_init_flag
= 0;
41 extern void mach_bridge_add_timestamp(uint64_t remote_timestamp
, uint64_t local_timestamp
);
42 extern void bt_calibration_thread_start(void);
43 extern void bt_params_add(struct bt_params
*params
);
46 mach_bridge_init_timestamp(void)
48 /* This function should be called only once by the driver
49 * implementing the interrupt handler for receiving timestamps */
50 if (os_atomic_load(&bt_init_flag
, relaxed
)) {
54 os_atomic_store(&bt_init_flag
, 1, release
);
56 /* Start the kernel thread only after all the locks have been initialized */
57 bt_calibration_thread_start();
61 * Conditions: Should be called from primary interrupt context
64 mach_bridge_recv_timestamps(uint64_t remoteTimestamp
, uint64_t localTimestamp
)
66 assert(ml_at_interrupt_context() == TRUE
);
68 /* Ensure the locks have been initialized */
69 if (!os_atomic_load(&bt_init_flag
, acquire
)) {
70 panic("%s called before mach_bridge_init_timestamp", __func__
);
74 KDBG(MACHDBG_CODE(DBG_MACH_CLOCK
, MACH_BRIDGE_RCV_TS
), localTimestamp
, remoteTimestamp
);
76 lck_spin_lock(&bt_spin_lock
);
77 mach_bridge_add_timestamp(remoteTimestamp
, localTimestamp
);
78 lck_spin_unlock(&bt_spin_lock
);
84 * This function is used to set parameters, calculated externally,
85 * needed for mach_bridge_remote_time.
88 mach_bridge_set_params(uint64_t local_timestamp
, uint64_t remote_timestamp
, double rate
)
90 /* Ensure the locks have been initialized */
91 if (!os_atomic_load(&bt_init_flag
, acquire
)) {
92 panic("%s called before mach_bridge_init_timestamp", __func__
);
96 struct bt_params params
= {};
97 params
.base_local_ts
= local_timestamp
;
98 params
.base_remote_ts
= remote_timestamp
;
100 lck_spin_lock(&bt_ts_conversion_lock
);
101 bt_params_add(¶ms
);
102 lck_spin_unlock(&bt_ts_conversion_lock
);
103 KDBG(MACHDBG_CODE(DBG_MACH_CLOCK
, MACH_BRIDGE_TS_PARAMS
), params
.base_local_ts
,
104 params
.base_remote_ts
, *(uint64_t *)((void *)¶ms
.rate
));