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- /****************************************************************************
- * include/nuttx/init.h
- *
- * Copyright (C) 2007, 2008, 2011, 2016 Gregory Nutt. All rights reserved.
- * Author: Gregory Nutt <gnutt@nuttx.org>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * 3. Neither the name NuttX nor the names of its contributors may be
- * used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- ****************************************************************************/
- #ifndef __INCLUDE_NUTTX_INIT_H
- #define __INCLUDE_NUTTX_INIT_H
- /****************************************************************************
- * Included Files
- ****************************************************************************/
- #include <nuttx/config.h>
- #include <nuttx/compiler.h>
- #include <stdint.h>
- /****************************************************************************
- * Pre-processor Definitions
- ****************************************************************************/
- /* Macros for testing which OS services are available at this phase of
- * initialization.
- */
- #define OSINIT_MM_READY() (g_nx_initstate >= OSINIT_MEMORY)
- #define OSINIT_HW_READY() (g_nx_initstate >= OSINIT_HARDWARE)
- #define OSINIT_OS_READY() (g_nx_initstate >= OSINIT_OSREADY)
- #define OSINIT_OS_INITIALIZING() (g_nx_initstate < OSINIT_OSREADY)
- /****************************************************************************
- * Public Types
- ****************************************************************************/
- /* Initialization state. OS bring-up occurs in several phases: */
- enum nx_initstate_e
- {
- OSINIT_POWERUP = 0, /* Power-up. No initialization yet performed.
- * Depends on .bss initialization logic for this
- * value. */
- OSINIT_BOOT = 1, /* Basic boot up initialization is complete. OS
- * services and hardware resources are not yet
- * available. */
- OSINIT_TASKLISTS = 2, /* Head of ready-to-run/assigned task lists valid */
- OSINIT_MEMORY = 3, /* The memory manager has been initialized */
- OSINIT_HARDWARE = 4, /* MCU-specific hardware is initialized. Hardware
- * resources such as timers and device drivers are
- * now available. Low-level OS services sufficient
- * to support the hardware are also available but
- * the OS has not yet completed its full
- * initialization. */
- OSINIT_OSREADY = 5 /* The OS is fully initialized and multi-tasking is
- * active. */
- };
- /****************************************************************************
- * Public Data
- ****************************************************************************/
- #ifdef __cplusplus
- #define EXTERN extern "C"
- extern "C"
- {
- #else
- #define EXTERN extern
- #endif
- /* This is the current initialization state. The level of initialization
- * is only important early in the start-up sequence when certain OS or
- * hardware resources may not yet be available to the OS-internal logic.
- */
- EXTERN uint8_t g_nx_initstate; /* See enum nx_initstate_e */
- /****************************************************************************
- * Public Function Prototypes
- ****************************************************************************/
- /* This entry point must be supplied by the application */
- int CONFIG_USER_ENTRYPOINT(int argc, char *argv[]);
- /* Functions contained in nx_task.c *****************************************/
- /* OS entry point called by boot logic */
- void nx_start(void) noreturn_function;
- #undef EXTERN
- #ifdef __cplusplus
- }
- #endif
- #endif /* __INCLUDE_NUTTX_INIT_H */
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