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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 */
/** */
/** Module Manager */
/** */
/**************************************************************************/
/**************************************************************************/
#ifdef FX_FILEX_PRESENT
#define TX_SOURCE_CODE
#include "tx_api.h"
#include "tx_initialize.h"
#include "tx_mutex.h"
#include "tx_thread.h"
#include "tx_byte_pool.h"
#include "fx_api.h"
#include "txm_module.h"
#include "txm_module_manager_util.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _txm_module_manager_file_load PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Scott Larson, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function reads the module preamble, allocates memory for */
/* module code, loads the module code from the file, and calls */
/* _txm_module_manager_internal_load to load the data and prepare the */
/* module for execution. */
/* */
/* INPUT */
/* */
/* module_instance Module instance pointer */
/* module_name Name of module */
/* media_ptr FileX media pointer */
/* file_name Name of module binary file */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* fx_file_close Close file */
/* fx_file_open Open file */
/* fx_file_read File read */
/* fx_file_seek File seek */
/* _tx_byte_allocate Allocate data area */
/* _txm_module_manager_internal_load Load data and prepare module for */
/* execution */
/* */
/* CALLED BY */
/* */
/* Application code */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 09-30-2020 Scott Larson Initial Version 6.1 */
/* */
/**************************************************************************/
UINT _txm_module_manager_file_load(TXM_MODULE_INSTANCE *module_instance, CHAR *module_name, FX_MEDIA *media_ptr, CHAR *file_name)
{
TXM_MODULE_PREAMBLE *module_preamble;
FX_FILE module_file;
TXM_MODULE_PREAMBLE preamble;
ULONG code_start;
ULONG code_size;
ULONG code_alignment;
ULONG code_allocation_size;
CHAR *code_memory_ptr;
UCHAR *destination_ptr;
ULONG actual_size;
UINT status;
/* Attempt to open the file. */
status = fx_file_open(media_ptr, &module_file, file_name, FX_OPEN_FOR_READ);
/* Check the file open status. */
if (status == FX_SUCCESS)
{
/* Read the preamble of the module. */
status = fx_file_read(&module_file, (VOID *) &preamble, sizeof(TXM_MODULE_PREAMBLE), &actual_size);
/* Check the file read status. */
if (status == FX_SUCCESS)
{
/* Check the number of bytes read. */
if (actual_size == sizeof(TXM_MODULE_PREAMBLE))
{
/* Pickup the module's information. */
module_preamble = (TXM_MODULE_PREAMBLE *) &preamble;
/* Pickup the module code size. */
code_size = module_preamble -> txm_module_preamble_code_size;
/* Check for valid sizes. */
if (code_size != 0)
{
/* Initialize module control block to all zeros. */
TX_MEMSET(module_instance, 0, sizeof(TXM_MODULE_INSTANCE));
/* Get the amount of the bytes we need to allocate for the module's code as well as the required alignment. */
status = _txm_module_manager_util_code_allocation_size_and_alignment_get(module_preamble, &code_alignment, &code_allocation_size);
if (status == TX_SUCCESS)
{
/* Allocate code memory for the module. */
status = _tx_byte_allocate(&_txm_module_manager_byte_pool, (VOID **) &code_memory_ptr, code_allocation_size, TX_NO_WAIT);
/* Determine if the module's code memory allocation was successful. */
if (status == TX_SUCCESS)
{
/* Prepare to read the module code into memory. */
code_start = (ULONG) code_memory_ptr;
code_start = (code_start + (code_alignment - 1)) & ~(code_alignment - 1);
destination_ptr = (UCHAR *) code_start;
/* Seek back to the beginning of the file. */
status = fx_file_seek(&module_file, 0);
if (status == FX_SUCCESS)
{
/* Read the module into memory. */
status = fx_file_read(&module_file, (VOID *) destination_ptr, code_size, &actual_size);
if (status == FX_SUCCESS)
{
/* Check the actual size read. */
if (actual_size == code_size)
{
/* At this point, the module's instruction area is now in the RAM code area. */
/* Now load it in-place. */
status = _txm_module_manager_internal_load(module_instance, module_name, (VOID *) code_start,
code_size, code_memory_ptr, code_allocation_size);
if (status == TX_SUCCESS)
{
/* Close the file. */
fx_file_close(&module_file);
/* Return success. */
return(TX_SUCCESS);
}
}
else
{
/* Invalid number of bytes read. */
status = TXM_MODULE_FILEX_INVALID_BYTES_READ;
}
}
}
/* Release the memory. */
_tx_byte_release(code_memory_ptr);
}
}
}
else
{
/* Invalid module preamble. */
status = TXM_MODULE_INVALID;
}
}
else
{
/* Invalid number of bytes read. */
status = TXM_MODULE_FILEX_INVALID_BYTES_READ;
}
}
/* Close the file. */
fx_file_close(&module_file);
}
/* Return success. */
return(status);
}
#endif
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