drivers/cpuidle/coupled.c

36  * WFI state until all cpus are ready to enter a coupled state, at
40  * Once all cpus are ready to enter idle, they are woken by an smp
45  * each cpu will increment the ready counter, and continue once the
46  * ready counter matches the number of online coupled cpus.  If any
51  * is ready for.  It is assumed that the states are indexed from
56  * and only read after all the cpus are ready for the coupled idle
62  * the waiting loop, in the ready loop, or in the coupled idle state.
63  * ready_count tracks the number of cpus that are in the ready loop
91  * @ready_waiting_counts: combined count of cpus  in ready or waiting loops
126  * once to minimize entering the ready loop with a poke pending, which would
203  * cpuidle_coupled_set_ready - mark a cpu as ready
212  * cpuidle_coupled_set_not_ready - mark a cpu as not ready
215  * Decrements the ready counter, unless the ready (and thus the waiting) counter
218  * cpu has decremented its ready counter, leading to the ready counter going
222  * Returns 0 if the counter was decremented successfully, -EINVAL if the ready
239  * cpuidle_coupled_no_cpus_ready - check if no cpus in a coupled set are ready
242  * Returns true if all of the cpus in a coupled set are out of the ready loop.
251  * cpuidle_coupled_cpus_ready - check if all cpus in a coupled set are ready
254  * Returns true if all cpus coupled to this target state are in the ready loop
400  * cpuidle_coupled_set_done - mark this cpu as leaving the ready loop
404  * Marks this cpu as no longer in the ready and waiting loops.  Decrements
542 	 * cpu as ready.  in cpuidle_enter_state_coupled()
548 	 * one of the other cpus just became active.  Increment the ready count,  in cpuidle_enter_state_coupled()
550 	 * cpu has incremented the ready counter, it cannot abort idle and must  in cpuidle_enter_state_coupled()
551 	 * spin until either all cpus have incremented the ready counter, or  in cpuidle_enter_state_coupled()
566 	 * Make sure read of all cpus ready is done before reading pending pokes  in cpuidle_enter_state_coupled()
574 	 * ready loop.  The pending interrupt may be lost by the interrupt  in cpuidle_enter_state_coupled()
613 	 * a cpu exits and re-enters the ready state because this cpu has  in cpuidle_enter_state_coupled()