ports_arch/ARMv8-M/threadx/ac6/src/tx_thread_secure_stack_initialize.S


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/***************************************************************************
 * Copyright (c) 2024 Microsoft Corporation
 * Copyright (c) 2026-present Eclipse ThreadX contributors
 *
 * 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                                                     */
/**                                                                       */
/**   Thread                                                              */
/**                                                                       */
/**************************************************************************/
/**************************************************************************/

#ifdef TX_INCLUDE_USER_DEFINE_FILE
#include "tx_user.h"
#endif

/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _tx_thread_secure_stack_initialize                Cortex-Mxx/AC6    */
/*                                                           6.2.1        */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Scott Larson, Microsoft Corporation                                 */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    This function enters the SVC handler to initialize a secure stack.  */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    none                                                                */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    none                                                                */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    SVC 3                                                               */
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    TX_PORT_SPECIFIC_PRE_INITIALIZATION                                 */
/*                                                                        */
/**************************************************************************/
// VOID   _tx_thread_secure_stack_initialize(VOID)
// {
    .section .text
    .balign 4
    .syntax unified
    .eabi_attribute Tag_ABI_align_preserved, 1
    .global  _tx_thread_secure_stack_initialize
    .thumb_func
.type _tx_thread_secure_stack_initialize, function
_tx_thread_secure_stack_initialize:
#if !defined(TX_SINGLE_MODE_SECURE) && !defined(TX_SINGLE_MODE_NON_SECURE)
    CPSIE   i               // Enable interrupts for SVC call
    SVC     3
    CPSID   i               // Disable interrupts
#else
    MOV     r0, #0xFF       // Feature not enabled
#endif
    BX      lr
    .end