diff options
Diffstat (limited to 'common/hooks.c')
| -rw-r--r-- | common/hooks.c | 45 |
1 files changed, 40 insertions, 5 deletions
diff --git a/common/hooks.c b/common/hooks.c index a17cf1ade1..4704992de0 100644 --- a/common/hooks.c +++ b/common/hooks.c @@ -1,10 +1,12 @@ -/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved. +/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved. * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ /* System hooks for Chrome EC */ +#include "atomic.h" +#include "console.h" #include "hooks.h" #include "link_defs.h" #include "timer.h" @@ -34,7 +36,12 @@ static const struct hook_ptrs hook_list[] = { {__hooks_second, __hooks_second_end}, }; -void hook_notify(enum hook_type type) +static uint32_t pending_hooks; + +/** + * Actual notification function + */ +static void notify(enum hook_type type) { const struct hook_data *start, *end, *p; int count, called = 0; @@ -63,18 +70,46 @@ void hook_notify(enum hook_type type) } } +void hook_notify(enum hook_type type) +{ + if (type == HOOK_AC_CHANGE) { + /* Store deferred hook and wake task */ + atomic_or(&pending_hooks, 1 << type); + task_wake(TASK_ID_TICK); + } else { + /* Notify now */ + notify(type); + } +} + void hook_task(void) { - /* Per-second hook will be called first time through the loop */ + /* Periodic hooks will be called first time through the loop */ static uint64_t last_second = -SECOND; + static uint64_t last_tick = -HOOK_TICK_INTERVAL; while (1) { uint64_t t = get_time().val; + uint32_t pending = atomic_read_clear(&pending_hooks); + int i; + + /* Call pending hooks, if any */ + for (i = 0; pending && i < 32; i++) { + const uint32_t mask = 1 << i; + + if (pending & mask) { + notify(i); + pending ^= mask; + } + } - hook_notify(HOOK_TICK); + if (t - last_tick >= HOOK_TICK_INTERVAL) { + notify(HOOK_TICK); + last_tick = t; + } if (t - last_second >= SECOND) { - hook_notify(HOOK_SECOND); + notify(HOOK_SECOND); last_second = t; } |