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/* Copyright 2020 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.
*/
#if !defined(__CROS_EC_HOOKS_H) || defined(__CROS_EC_ZEPHYR_HOOKS_SHIM_H)
#error "This file must only be included from hooks.h. Include hooks.h directly."
#endif
#define __CROS_EC_ZEPHYR_HOOKS_SHIM_H
#include <init.h>
#include <kernel.h>
#include <zephyr.h>
#include "common.h"
/**
* The internal data structure stored for a deferred function.
*/
struct deferred_data {
void (*routine)(void);
struct k_delayed_work delayed_work;
};
/**
* See include/hooks.h for documentation.
*/
int hook_call_deferred(const struct deferred_data *data, int us);
/**
* Runtime helper to setup deferred data.
*
* @param data The struct deferred_data.
*/
void zephyr_shim_setup_deferred(const struct deferred_data *data);
/**
* See include/hooks.h for documentation.
*
* Typically Zephyr would put const data in the rodata section but that is
* write-protected with native_posix. So force it into .data when building for
* ARCH_POSIX and put it in .rodata in all other cases so that it does not take
* extra RAM space.
*/
#ifdef CONFIG_ARCH_POSIX
#define DEFERRED_DATA_SECTION ".data.hooks"
#else
#define DEFERRED_DATA_SECTION ".rodata.hooks"
#endif
#define DECLARE_DEFERRED(routine) _DECLARE_DEFERRED(routine)
#define _DECLARE_DEFERRED(_routine) \
__maybe_unused const struct deferred_data _routine##_data \
__attribute__((section(DEFERRED_DATA_SECTION))) = { \
.routine = _routine, \
}; \
static int _setup_deferred_##_routine(const struct device *unused) \
{ \
ARG_UNUSED(unused); \
zephyr_shim_setup_deferred(&_routine##_data); \
return 0; \
} \
SYS_INIT(_setup_deferred_##_routine, APPLICATION, 1)
/**
* Internal linked-list structure used to store hook lists.
*/
struct zephyr_shim_hook_list {
void (*routine)(void);
int priority;
struct zephyr_shim_hook_list *next;
};
/**
* Runtime helper for DECLARE_HOOK setup data.
*
* @param type The type of hook.
* @param routine The handler for the hook.
* @param priority The priority (smaller values are executed first).
* @param entry A statically allocated list entry.
*/
void zephyr_shim_setup_hook(enum hook_type type, void (*routine)(void),
int priority, struct zephyr_shim_hook_list *entry);
/**
* See include/hooks.h for documentation.
*/
#define DECLARE_HOOK(hooktype, routine, priority) \
_DECLARE_HOOK_1(hooktype, routine, priority, __LINE__)
#define _DECLARE_HOOK_1(hooktype, routine, priority, line) \
_DECLARE_HOOK_2(hooktype, routine, priority, line)
#define _DECLARE_HOOK_2(hooktype, routine, priority, line) \
static int _setup_hook_##line(const struct device *unused) \
{ \
ARG_UNUSED(unused); \
static struct zephyr_shim_hook_list lst; \
zephyr_shim_setup_hook(hooktype, routine, priority, &lst); \
return 0; \
} \
SYS_INIT(_setup_hook_##line, APPLICATION, 1)
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