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f4e772708b
This covers modules which need to initialize before task_start(), but don't particularly care in what order they're initialized. Signed-off-by: Randall Spangler <rspangler@chromium.org> BUG=none TEST=if it boots, it works Change-Id: I69829aac8d1c3c14ee04916a794b84bbf03a09eb
51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* System hooks for Chrome EC */
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#ifndef __CROS_EC_HOOKS_H
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#define __CROS_EC_HOOKS_H
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#include "common.h"
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enum hook_priority {
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HOOK_PRIO_FIRST = 1, /* Highest priority */
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HOOK_PRIO_DEFAULT = 5000, /* Default priority */
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HOOK_PRIO_LAST = 9999 /* Lowest priority */
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};
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enum hook_type {
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HOOK_INIT, /* System init */
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HOOK_FREQ_CHANGE, /* System clock changed frequency */
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};
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struct hook_data {
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/* Hook processing routine; returns EC error code. */
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int (*routine)(void);
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/* Priority; low numbers = higher priority. */
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int priority;
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};
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/* Call all the hook routines of a specified type. If stop_on_error, stops on
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* the first non-EC_SUCCESS return code. Returns the first non-EC_SUCCESS
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* return code, if any, or EC_SUCCESS if all hooks returned EC_SUCCESS. */
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int hook_notify(enum hook_type type, int stop_on_error);
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/* Register a hook routine. <hooktype> should be one of enum hook_type.
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* <routine> should be int routine(void), and should return an error code or
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* EC_SUCCESS if no error. <priority> should be between HOOK_PRIO_FIRST and
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* HOOK_PRIO_LAST, and should be HOOK_PRIO_DEFAULT unless there's a compelling
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* reason to care about the order in which hooks are called. */
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#define DECLARE_HOOK(hooktype, routine, priority) \
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const struct hook_data __hook_##hooktype##_##routine \
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__attribute__((section(".rodata." #hooktype))) \
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= {routine, priority}
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#endif /* __CROS_EC_HOOKS_H */
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