68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
#include <string.h>
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#include <device.h>
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#include <misc/util.h>
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extern struct device __device_init_start[];
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extern struct device __device_PRIMARY_start[];
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extern struct device __device_SECONDARY_start[];
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extern struct device __device_NANOKERNEL_start[];
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extern struct device __device_MICROKERNEL_start[];
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extern struct device __device_APPLICATION_start[];
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extern struct device __device_init_end[];
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static struct device *config_levels[] = {
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__device_PRIMARY_start,
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__device_SECONDARY_start,
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__device_NANOKERNEL_start,
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__device_MICROKERNEL_start,
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__device_APPLICATION_start,
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__device_init_end,
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};
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/**
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* @brief Execute all the device initialization functions at a given level
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*
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* @details Invokes the initialization routine for each device object
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* created by the SYS_DEFINE_DEVICE() macro using the specified level.
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* The linker script places the device objects in memory in the order
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* they need to be invoked, with symbols indicating where one level leaves
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* off and the next one begins.
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*
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* @param level init level to run.
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*/
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void _sys_device_do_config_level(int level)
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{
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struct device *info;
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for (info = config_levels[level]; info < config_levels[level+1]; info++) {
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struct device_config *device = info->config;
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device->init(info);
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}
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}
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/**
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* @brief Retrieve the device structure for a driver by name
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*
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* @details Device objects are created via the SYS_DEFINE_DEVICE() macro and
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* placed in memory by the linker. If a driver needs to bind to another driver
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* it can use this function to retrieve the device structure of the lower level
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* driver by the name the driver exposes to the system.
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*
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* @param name device name to search for.
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*
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* @return pointer to device structure, or NULL if not found.
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*/
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struct device *device_get_binding(char *name)
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{
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struct device *info;
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for (info = __device_init_start; info != __device_init_end; info++) {
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if (!strcmp(name, info->config->name)) {
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return info;
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}
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}
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return NULL;
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}
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