blob: 5e71542909e03547a06068fef5cc58271d890fdc [file] [log] [blame]
/*
* Copyright (c) 2015-2016 Intel Corporation.
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <string.h>
#include <device.h>
#include <sys/atomic.h>
#include <syscall_handler.h>
extern const struct init_entry __init_start[];
extern const struct init_entry __init_PRE_KERNEL_1_start[];
extern const struct init_entry __init_PRE_KERNEL_2_start[];
extern const struct init_entry __init_POST_KERNEL_start[];
extern const struct init_entry __init_APPLICATION_start[];
extern const struct init_entry __init_end[];
#ifdef CONFIG_SMP
extern const struct init_entry __init_SMP_start[];
#endif
extern const struct device __device_start[];
extern const struct device __device_end[];
extern uint32_t __device_init_status_start[];
#ifdef CONFIG_DEVICE_POWER_MANAGEMENT
extern uint32_t __device_busy_start[];
extern uint32_t __device_busy_end[];
#define DEVICE_BUSY_SIZE (__device_busy_end - __device_busy_start)
#endif
/**
* @brief Execute all the init entry initialization functions at a given level
*
* @details Invokes the initialization routine for each init entry object
* created by the INIT_ENTRY_DEFINE() macro using the specified level.
* The linker script places the init entry objects in memory in the order
* they need to be invoked, with symbols indicating where one level leaves
* off and the next one begins.
*
* @param level init level to run.
*/
void z_sys_init_run_level(int32_t level)
{
static const struct init_entry *levels[] = {
__init_PRE_KERNEL_1_start,
__init_PRE_KERNEL_2_start,
__init_POST_KERNEL_start,
__init_APPLICATION_start,
#ifdef CONFIG_SMP
__init_SMP_start,
#endif
/* End marker */
__init_end,
};
const struct init_entry *entry;
for (entry = levels[level]; entry < levels[level+1]; entry++) {
const struct device *dev = entry->dev;
if (dev != NULL) {
z_object_init(dev);
}
if ((entry->init(dev) != 0) && (dev != NULL)) {
/* Initialization failed.
* Set the init status bit so device is not declared ready.
*/
sys_bitfield_set_bit(
(mem_addr_t) __device_init_status_start,
(dev - __device_start));
}
}
}
const struct device *z_impl_device_get_binding(const char *name)
{
const struct device *dev;
/* Split the search into two loops: in the common scenario, where
* device names are stored in ROM (and are referenced by the user
* with CONFIG_* macros), only cheap pointer comparisons will be
* performed. Reserve string comparisons for a fallback.
*/
for (dev = __device_start; dev != __device_end; dev++) {
if (z_device_ready(dev) && (dev->name == name)) {
return dev;
}
}
for (dev = __device_start; dev != __device_end; dev++) {
if (z_device_ready(dev) && (strcmp(name, dev->name) == 0)) {
return dev;
}
}
return NULL;
}
#ifdef CONFIG_USERSPACE
static inline const struct device *z_vrfy_device_get_binding(const char *name)
{
char name_copy[Z_DEVICE_MAX_NAME_LEN];
if (z_user_string_copy(name_copy, (char *)name, sizeof(name_copy))
!= 0) {
return 0;
}
return z_impl_device_get_binding(name_copy);
}
#include <syscalls/device_get_binding_mrsh.c>
#endif /* CONFIG_USERSPACE */
size_t z_device_get_all_static(struct device const **devices)
{
*devices = __device_start;
return __device_end - __device_start;
}
bool z_device_ready(const struct device *dev)
{
/* Set bit indicates device failed initialization */
return !(sys_bitfield_test_bit((mem_addr_t)__device_init_status_start,
(dev - __device_start)));
}
#ifdef CONFIG_DEVICE_POWER_MANAGEMENT
int device_pm_control_nop(const struct device *unused_device,
uint32_t unused_ctrl_command,
void *unused_context,
device_pm_cb cb,
void *unused_arg)
{
return -ENOTSUP;
}
int device_any_busy_check(void)
{
int i = 0;
for (i = 0; i < DEVICE_BUSY_SIZE; i++) {
if (__device_busy_start[i] != 0U) {
return -EBUSY;
}
}
return 0;
}
int device_busy_check(const struct device *chk_dev)
{
if (atomic_test_bit((const atomic_t *)__device_busy_start,
(chk_dev - __device_start))) {
return -EBUSY;
}
return 0;
}
#endif
void device_busy_set(const struct device *busy_dev)
{
#ifdef CONFIG_DEVICE_POWER_MANAGEMENT
atomic_set_bit((atomic_t *) __device_busy_start,
(busy_dev - __device_start));
#else
ARG_UNUSED(busy_dev);
#endif
}
void device_busy_clear(const struct device *busy_dev)
{
#ifdef CONFIG_DEVICE_POWER_MANAGEMENT
atomic_clear_bit((atomic_t *) __device_busy_start,
(busy_dev - __device_start));
#else
ARG_UNUSED(busy_dev);
#endif
}