189 lines
8.6 KiB
C
189 lines
8.6 KiB
C
/**************************************************************************/
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/* */
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/* Copyright (c) Microsoft Corporation. All rights reserved. */
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/* */
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/* This software is licensed under the Microsoft Software License */
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/* Terms for Microsoft Azure RTOS. Full text of the license can be */
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/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
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/* and in the root directory of this software. */
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/* */
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/**************************************************************************/
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/**************************************************************************/
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/**************************************************************************/
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/** */
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/** ThreadX Component */
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/** */
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/** Initialize */
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/** */
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/**************************************************************************/
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/**************************************************************************/
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#define TX_SOURCE_CODE
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#define TX_THREAD_SMP_SOURCE_CODE
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/* Include necessary system files. */
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#include "tx_api.h"
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#include "tx_initialize.h"
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#include "tx_thread.h"
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#include "tx_timer.h"
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/* Define any port-specific scheduling data structures. */
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TX_PORT_SPECIFIC_DATA
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#ifdef TX_SAFETY_CRITICAL
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TX_SAFETY_CRITICAL_EXCEPTION_HANDLER
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#endif
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/**************************************************************************/
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/* */
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/* FUNCTION RELEASE */
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/* */
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/* _tx_initialize_kernel_enter PORTABLE SMP */
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/* 6.1 */
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/* AUTHOR */
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/* */
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/* William E. Lamie, Microsoft Corporation */
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/* */
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/* DESCRIPTION */
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/* */
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/* This function is the first ThreadX function called during */
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/* initialization. It is called from the application's "main()" */
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/* function. It is important to note that this routine never */
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/* returns. The processing of this function is relatively simple: */
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/* it calls several ThreadX initialization functions (if needed), */
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/* calls the application define function, and then invokes the */
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/* scheduler. */
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/* */
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/* INPUT */
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/* */
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/* None */
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/* */
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/* OUTPUT */
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/* */
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/* None */
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/* */
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/* CALLS */
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/* */
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/* _tx_thread_smp_high_level_initialize SMP initialization */
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/* _tx_thread_smp_current_state_set Set system state for all cores */
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/* _tx_initialize_low_level Low-level initialization */
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/* _tx_initialize_high_level High-level initialization */
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/* tx_application_define Application define function */
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/* _tx_thread_scheduler ThreadX scheduling loop */
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/* */
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/* CALLED BY */
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/* */
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/* main Application main program */
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/* */
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/* RELEASE HISTORY */
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/* */
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/* DATE NAME DESCRIPTION */
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/* */
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/* 09-30-2020 William E. Lamie Initial Version 6.1 */
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/* */
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/**************************************************************************/
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VOID _tx_initialize_kernel_enter(VOID)
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{
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ULONG other_core_status, i;
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/* Determine if the compiler has pre-initialized ThreadX. */
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if (_tx_thread_system_state[0] != TX_INITIALIZE_ALMOST_DONE)
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{
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/* No, the initialization still needs to take place. */
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/* Ensure that the system state variable is set to indicate
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initialization is in progress. Note that this variable is
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later used to represent interrupt nesting. */
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_tx_thread_smp_current_state_set(TX_INITIALIZE_IN_PROGRESS);
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/* Call any port specific preprocessing. */
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TX_PORT_SPECIFIC_PRE_INITIALIZATION
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/* Invoke the low-level initialization to handle all processor specific
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initialization issues. */
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_tx_initialize_low_level();
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/* Call the high-level SMP Initialization. */
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_tx_thread_smp_high_level_initialize();
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/* Invoke the high-level initialization to exercise all of the
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ThreadX components and the application's initialization
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function. */
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_tx_initialize_high_level();
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/* Call any port specific post-processing. */
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TX_PORT_SPECIFIC_POST_INITIALIZATION
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}
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/* Optional processing extension. */
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TX_INITIALIZE_KERNEL_ENTER_EXTENSION
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/* Ensure that the system state variable is set to indicate
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initialization is in progress. Note that this variable is
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later used to represent interrupt nesting. */
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_tx_thread_system_state[0] = TX_INITIALIZE_IN_PROGRESS;
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/* Call the application provided initialization function. Pass the
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first available memory address to it. */
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tx_application_define(_tx_initialize_unused_memory);
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/* Call any port specific pre-scheduler processing. */
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TX_PORT_SPECIFIC_PRE_SCHEDULER_INITIALIZATION
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/* Now wait for all cores to become ready for scheduling. */
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do
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{
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/* Release the other cores from initialization. */
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_tx_thread_smp_release_cores_flag = TX_TRUE;
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/* Add all the status together... Other cores must clear their system
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state before they they are released. */
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other_core_status = ((ULONG) 0);
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#ifndef TX_THREAD_SMP_DYNAMIC_CORE_MAX
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for (i = ((ULONG) 1); i < ((ULONG) TX_THREAD_SMP_MAX_CORES); i++)
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#else
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for (i = ((ULONG) 1); i < _tx_thread_smp_max_cores; i++)
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#endif
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{
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/* Call port-specific memory synchronization primitive. */
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TX_PORT_SPECIFIC_MEMORY_SYNCHRONIZATION
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/* Add the states of each subsequent core. */
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other_core_status = other_core_status + _tx_thread_system_state[i];
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}
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} while (other_core_status != ((ULONG) 0));
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/* Set the system state in preparation for entering the thread
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scheduler. */
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_tx_thread_system_state[0] = TX_INITIALIZE_IS_FINISHED;
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/* Call port-specific memory synchronization primitive. */
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TX_PORT_SPECIFIC_MEMORY_SYNCHRONIZATION
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/* Enter the scheduling loop to start executing threads! */
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_tx_thread_schedule();
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#ifdef TX_SAFETY_CRITICAL
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/* If we ever get here, raise safety critical exception. */
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TX_SAFETY_CRITICAL_EXCEPTION(__FILE__, __LINE__, 0);
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#endif
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}
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