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/***************************************************************************
* Copyright (c) 2024 Microsoft Corporation
*
* This program and the accompanying materials are made available under the
* terms of the MIT License which is available at
* https://opensource.org/licenses/MIT.
*
* SPDX-License-Identifier: MIT
**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** ThreadX Component */
/** */
/** Initialize */
/** */
/**************************************************************************/
/**************************************************************************/
#define TX_SOURCE_CODE
#define TX_THREAD_SMP_SOURCE_CODE
/* Include necessary system files. */
#include "tx_api.h"
#include "tx_initialize.h"
#include "tx_thread.h"
#include "tx_timer.h"
/* Define any port-specific scheduling data structures. */
TX_PORT_SPECIFIC_DATA
#ifdef TX_SAFETY_CRITICAL
TX_SAFETY_CRITICAL_EXCEPTION_HANDLER
#endif
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _tx_initialize_kernel_enter PORTABLE SMP */
/* 6.3.0 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function is the first ThreadX function called during */
/* initialization. It is called from the application's "main()" */
/* function. It is important to note that this routine never */
/* returns. The processing of this function is relatively simple: */
/* it calls several ThreadX initialization functions (if needed), */
/* calls the application define function, and then invokes the */
/* scheduler. */
/* */
/* INPUT */
/* */
/* None */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* _tx_thread_smp_high_level_initialize SMP initialization */
/* _tx_thread_smp_current_state_set Set system state for all cores */
/* _tx_initialize_low_level Low-level initialization */
/* _tx_initialize_high_level High-level initialization */
/* tx_application_define Application define function */
/* _tx_thread_scheduler ThreadX scheduling loop */
/* */
/* CALLED BY */
/* */
/* main Application main program */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 09-30-2020 William E. Lamie Initial Version 6.1 */
/* 10-31-2023 Xiuwen Cai Modified comment(s), */
/* added random generator */
/* initialization, */
/* resulting in version 6.3.0 */
/* */
/**************************************************************************/
VOID _tx_initialize_kernel_enter(VOID)
{
ULONG other_core_status, i;
/* Determine if the compiler has pre-initialized ThreadX. */
if (_tx_thread_system_state[0] != TX_INITIALIZE_ALMOST_DONE)
{
/* No, the initialization still needs to take place. */
/* Ensure that the system state variable is set to indicate
initialization is in progress. Note that this variable is
later used to represent interrupt nesting. */
_tx_thread_smp_current_state_set(TX_INITIALIZE_IN_PROGRESS);
/* Call any port specific preprocessing. */
TX_PORT_SPECIFIC_PRE_INITIALIZATION
/* Invoke the low-level initialization to handle all processor specific
initialization issues. */
_tx_initialize_low_level();
/* Call the high-level SMP Initialization. */
_tx_thread_smp_high_level_initialize();
/* Invoke the high-level initialization to exercise all of the
ThreadX components and the application's initialization
function. */
_tx_initialize_high_level();
/* Call any port specific post-processing. */
TX_PORT_SPECIFIC_POST_INITIALIZATION
}
/* Optional processing extension. */
TX_INITIALIZE_KERNEL_ENTER_EXTENSION
/* Ensure that the system state variable is set to indicate
initialization is in progress. Note that this variable is
later used to represent interrupt nesting. */
_tx_thread_system_state[0] = TX_INITIALIZE_IN_PROGRESS;
/* Optional random number generator initialization. */
TX_INITIALIZE_RANDOM_GENERATOR_INITIALIZATION
/* Call the application provided initialization function. Pass the
first available memory address to it. */
tx_application_define(_tx_initialize_unused_memory);
/* Call any port specific pre-scheduler processing. */
TX_PORT_SPECIFIC_PRE_SCHEDULER_INITIALIZATION
/* Now wait for all cores to become ready for scheduling. */
do
{
/* Release the other cores from initialization. */
_tx_thread_smp_release_cores_flag = TX_TRUE;
/* Add all the status together... Other cores must clear their system
state before they they are released. */
other_core_status = ((ULONG) 0);
#ifndef TX_THREAD_SMP_DYNAMIC_CORE_MAX
for (i = ((ULONG) 1); i < ((ULONG) TX_THREAD_SMP_MAX_CORES); i++)
#else
for (i = ((ULONG) 1); i < _tx_thread_smp_max_cores; i++)
#endif
{
/* Call port-specific memory synchronization primitive. */
TX_PORT_SPECIFIC_MEMORY_SYNCHRONIZATION
/* Add the states of each subsequent core. */
other_core_status = other_core_status + _tx_thread_system_state[i];
}
} while (other_core_status != ((ULONG) 0));
/* Set the system state in preparation for entering the thread
scheduler. */
_tx_thread_system_state[0] = TX_INITIALIZE_IS_FINISHED;
/* Call port-specific memory synchronization primitive. */
TX_PORT_SPECIFIC_MEMORY_SYNCHRONIZATION
/* Enter the scheduling loop to start executing threads! */
_tx_thread_schedule();
#ifdef TX_SAFETY_CRITICAL
/* If we ever get here, raise safety critical exception. */
TX_SAFETY_CRITICAL_EXCEPTION(__FILE__, __LINE__, 0);
#endif
}
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