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/*
* FreeRTOS V202212.00
* Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* https://www.FreeRTOS.org
* https://github.com/FreeRTOS
*
*/
/* Standard includes. */
#include <arm_cmse.h>
#include <stdio.h>
/* Device includes. */
#include "NuMicro.h"
#include "partition_M2351.h"
/* FreeRTOS includes. */
#include "secure_port_macros.h"
/* Start address of non-secure application. */
#define mainNONSECURE_APP_START_ADDRESS ( 0x10040000 )
/* typedef for non-secure Reset Handler. */
typedef __attribute__( ( cmse_nonsecure_call ) ) void ( *NonSecureResetHandler_t )( void );
/*-----------------------------------------------------------*/
/**
* @brief Sets up the hardware - clocks and UARTs.
*/
static void prvSetupHardware( void );
/**
* @brief Boots into the non-secure code.
*
* @param[in] ulNonSecureStartAddress Start address of the non-secure application.
*/
static void prvBootNonSecure( uint32_t ulNonSecureStartAddress );
/*-----------------------------------------------------------*/
/* For instructions on how to build and run this demo, visit the following link:
* https://www.freertos.org/RTOS-Cortex-M23-NuMaker-PFM-M2351-Keil.html
*/
/* Secure main. */
int main(void)
{
/* Unlock protected registers. */
SYS_UnlockReg();
/* Initialize the hardware. */
prvSetupHardware();
/* Print banner. */
printf( "\r\n" );
printf( "+---------------------------------------------+\r\n" );
printf( "| Secure is running ... |\r\n" );
printf( "+---------------------------------------------+\r\n" );
/* Do not generate Systick interrupt on secure side. */
SysTick_Config( 1 );
/* Set GPIO Port A to non-secure for controlling LEDs from the non-secure
* side . */
SCU_SET_IONSSET( SCU_IONSSET_PA_Msk );
/* Set UART0 to non-secure for debug output from non-secure side. */
SCU_SET_PNSSET( UART0_Attr );
/* Lock protected registers before booting non-secure code. */
SYS_LockReg();
/* Boot the non-secure code. */
printf( "Entering non-secure world ...\n" );
prvBootNonSecure( mainNONSECURE_APP_START_ADDRESS );
/* Non-secure software does not return, this code is not executed. */
for( ; ; )
{
/* Should not reach here. */
}
}
/*-----------------------------------------------------------*/
static void prvSetupHardware( void )
{
/* Init System Clock. */
/* Enable PLL */
CLK->PLLCTL = CLK_PLLCTL_64MHz_HIRC;
/* Wait for PLL to be stable. */
while( ( CLK->STATUS & CLK_STATUS_PLLSTB_Msk ) == 0 );
/* Set HCLK divider to 1. */
CLK->CLKDIV0 = ( CLK->CLKDIV0 & ( ~CLK_CLKDIV0_HCLKDIV_Msk ) );
/* Switch HCLK clock source to PLL. */
CLK->CLKSEL0 = ( CLK->CLKSEL0 & ( ~CLK_CLKSEL0_HCLKSEL_Msk ) ) | CLK_CLKSEL0_HCLKSEL_PLL;
/* Initialize UART0 - It is used for debug output from the non-secure side. */
/* Enable UART0 clock. */
CLK->APBCLK0 |= CLK_APBCLK0_UART0CKEN_Msk;
/* Select UART0 clock source. */
CLK->CLKSEL1 = ( CLK->CLKSEL1 & ( ~CLK_CLKSEL1_UART0SEL_Msk ) ) | CLK_CLKSEL1_UART0SEL_HIRC;
/* Set multi-function pins for UART0 RXD and TXD. */
SYS->GPB_MFPH = ( SYS->GPB_MFPH & ( ~UART0_RXD_PB12_Msk ) ) | UART0_RXD_PB12;
SYS->GPB_MFPH = ( SYS->GPB_MFPH & ( ~UART0_TXD_PB13_Msk ) ) | UART0_TXD_PB13;
/* Initialize UART1 - It is used for debug output from the secure side. */
/* Enable UART1 clock. */
CLK->APBCLK0 |= CLK_APBCLK0_UART1CKEN_Msk;
/* Select UART1 clock source. */
CLK->CLKSEL1 = ( CLK->CLKSEL1 & ( ~CLK_CLKSEL1_UART1SEL_Msk ) ) | CLK_CLKSEL1_UART1SEL_HIRC;
/* Set multi-function pins for UART1 RXD and TXD. */
SYS->GPA_MFPL = ( SYS->GPA_MFPL & ( ~UART1_RXD_PA2_Msk ) ) | UART1_RXD_PA2;
SYS->GPA_MFPL = ( SYS->GPA_MFPL & ( ~UART1_TXD_PA3_Msk ) ) | UART1_TXD_PA3;
/* Update System Core Clock. */
PllClock = 64000000; /* PLL. */
SystemCoreClock = 64000000 / 1; /* HCLK. */
CyclesPerUs = 64000000 / 1000000; /* For SYS_SysTickDelay(). */
/* Initialize the debug port. */
DEBUG_PORT->BAUD = UART_BAUD_MODE2 | UART_BAUD_MODE2_DIVIDER(__HIRC, 115200);
DEBUG_PORT->LINE = UART_WORD_LEN_8 | UART_PARITY_NONE | UART_STOP_BIT_1;
}
/*-----------------------------------------------------------*/
static void prvBootNonSecure( uint32_t ulNonSecureStartAddress )
{
NonSecureResetHandler_t pxNonSecureResetHandler;
/* Setup the non-secure vector table. */
SCB_NS->VTOR = ulNonSecureStartAddress;
/* Main Stack Pointer value for the non-secure side is the first entry in
* the non-secure vector table. Read the first entry and assign the same to
* the non-secure main stack pointer(MSP_NS). */
secureportSET_MSP_NS( *( ( uint32_t * )( ulNonSecureStartAddress ) ) );
/* Reset Handler for the non-secure side is the second entry in the
* non-secure vector table. Read the second entry to get the non-secure
* Reset Handler. */
pxNonSecureResetHandler = ( NonSecureResetHandler_t )( * ( ( uint32_t * ) ( ( ulNonSecureStartAddress ) + 4U ) ) );
/* Start non-secure state software application by jumping to the non-secure
* Reset Handler. */
pxNonSecureResetHandler();
}
/*-----------------------------------------------------------*/
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