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S32K34 with FreeRTOS and MPU five memory Manager exception

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S32K34 with FreeRTOS and MPU five memory Manager exception

‎12-09-2022 12:21 PM
1,137 Views
HemantK
Contributor III

Hello All, 

We are trying to use S32K3 with FreeRTOS and MPU enabled. I have created only one task using "xTaskCreateRestrictedStatic" function and when I set the task to be privileged then it works fine but setting it as unprivileged task then I get memory Manager exception.

I am using the following setup:

1. FreeRTOS version 10.5.1

2. Port.c taken from FreeRTOS GCC Port "ARM_CM4_MPU"

 

I have also updated the linker file as per recommendation in FreeRTOS document and it looks like this: 

 

/*==================================================================================================
*   Project              : RTD AUTOSAR 4.4
*   Platform             : CORTEXM
*   Peripheral           : 
*   Dependencies         : none
*
*   Autosar Version      : 4.4.0
*   Autosar Revision     : ASR_REL_4_4_REV_0000
*   Autosar Conf.Variant :
*   SW Version           : 2.0.0
*   Build Version        : S32K3_RTD_2_0_0_D2203_ASR_REL_4_4_REV_0000_20220331
*
*   (c) Copyright 2020 - 2022 NXP Semiconductors
*   All Rights Reserved.
*
*   NXP Confidential. This software is owned or controlled by NXP and may only be
*   used strictly in accordance with the applicable license terms. By expressly
*   accepting such terms or by downloading, installing, activating and/or otherwise
*   using the software, you are agreeing that you have read, and that you agree to
*   comply with and are bound by, such license terms. If you do not agree to be
*   bound by the applicable license terms, then you may not retain, install,
*   activate or otherwise use the software.
==================================================================================================*/
/*
* GCC Linker Command File:
* 0x00400000    0x007FFFFF  4194304 Program Flash (last 64K sBAF)
* 0x10000000    0x1003FFFF  262144  Data Flash (last 32K HSE_NVM)
* 0x20400000    0x20408000  32768   Standby RAM_0 (32K)
* 0x20400000    0x20427FFF  163840  SRAM_0
* 0x20428000    0x2044FFFF  163840  SRAM_1
* Last 48 KB of SRAM_1 reserved by HSE Firmware
* Last 176 KB of CODE_FLASH_3 reserved by HSE Firmware
* Last 128 KB of DATA_FLASH reserved by HSE Firmware (not supported in this linker file)
*/
HEAP_SIZE  = DEFINED(__heap_size__)  ? __heap_size__  : 0x00002000;

ENTRY(Reset_Handler)

MEMORY 
{         
    /*int_flash               : ORIGIN = 0x00400000, LENGTH = 0x003D4000  */  /* 4096K - 176K (sBAF + HSE)*/
    int_flash               : ORIGIN = 0x00400000, LENGTH = 0x00300000    /* 4096K - 176K (sBAF + HSE)*/
    int_itcm                : ORIGIN = 0x00000000, LENGTH = 0x00010000    /* 32K */
    int_dtcm                : ORIGIN = 0x20000000, LENGTH = 0x00020000    /* 64K */
    int_sram                : ORIGIN = 0x20400000, LENGTH = 0x0002DF00    /* 183.9K */
    int_sram_fls_rsv        : ORIGIN = 0x2042DF00, LENGTH = 0x00000100    /* 0.1K */
    int_sram_stack_c0       : ORIGIN = 0x2042E000, LENGTH = 0x00001000    /* 4KB  */
    int_sram_stack_c1       : ORIGIN = 0x2042F000, LENGTH = 0x00001000    /* 4KB  */
    int_sram_no_cacheable   : ORIGIN = 0x20430000, LENGTH = 0x0000FF00    /* 64KB, needs to include int_results  */
    int_sram_results        : ORIGIN = 0x2043FF00, LENGTH = 0x00000100
    int_sram_shareable      : ORIGIN = 0x20440000, LENGTH = 0x00004000    /* 16KB */
    ram_rsvd2               : ORIGIN = 0x20444000, LENGTH = 0             /* End of SRAM */
}


/* Initial 32K Flash is used to store kernel functions and
 * initial 32K RAM is used to store kernel data. */
__privileged_functions_region_size__  = 40K;
__privileged_data_region_size__       = 40K;

__FLASH_segment_start__               = ORIGIN( int_flash );
__FLASH_segment_end__                 = __FLASH_segment_start__ + LENGTH( int_flash );

__SRAM_segment_start__                = ORIGIN( int_sram );
__SRAM_segment_end__                  = __SRAM_segment_start__ + LENGTH( int_sram );

__privileged_functions_start__        = __FLASH_segment_start__;
__privileged_functions_end__          = __FLASH_segment_start__ + __privileged_functions_region_size__;

__privileged_data_start__             = __SRAM_segment_start__;
__privileged_data_end__               = __SRAM_segment_start__ + __privileged_data_region_size__;


SECTIONS
{
	.flash :
	{
    	KEEP(*(.boot_header))
        . = ALIGN(4096);
        __text_start = .;
        __interrupts_rom_start = .;
        KEEP(*(.intc_vector))    
        . = ALIGN(4);
        __interrupts_rom_end = .;
        KEEP(*(.core_loop)) 
        . = ALIGN(4);
        *(.startup) 
        . = ALIGN(4);
        *(.systeminit) 
        . = ALIGN(4);
        *(.text.startup) 
		*(privileged_functions)
		. = ALIGN(4);
		FILL(0xDEAD);
		/* Ensure that non-privileged code is placed after the region reserved for
		 * privileged kernel code. */
		/* Note that dot (.) actually refers to the byte offset from the start of
		 * the current section (.privileged_functions in this case). As a result,
		 * setting dot (.) to a value sets the size of the section. */
		. = __privileged_functions_region_size__;	        
		. = ALIGN(4);
		__syscalls_flash_start__ = .;
		*(freertos_system_calls)
		__syscalls_flash_end__ = .;
		. = ALIGN(4);	
        *(.text)
        *(.text*) 
        . = ALIGN(4);
        *(.mcal_text) 
        . = ALIGN(4);
        *(.acmcu_code_rom)
        . = ALIGN(4);
        __acfls_code_rom_start = .;
        *(.acfls_code_rom) 
        . = ALIGN(4);
        __acfls_code_rom_end = .;
        KEEP(*(.init))
        . = ALIGN(4);
        KEEP(*(.fini)) 
		. = ALIGN(4);
	
        . = ALIGN(4);
        *(.rodata)  
        *(.rodata*)  
        . = ALIGN(4);
        *(.mcal_const_cfg)  
        . = ALIGN(4);
        *(.mcal_const)  
        . = ALIGN(4);
        __init_table = .;
        KEEP(*(.init_table))  
        . = ALIGN(4);
        __zero_table = .;
        KEEP(*(.zero_table))	
	} >int_flash	

    . = ALIGN(4);
    __text_end = .;
    __sram_data_rom = __text_end;
    
    .sram_data : AT(__sram_data_rom)
    {
        . = ALIGN(4);
        __sram_data_begin__ = .; 
		*(privileged_data)
		. = ALIGN(4);
		FILL(0xDEAD);
		/* Ensure that non-privileged data is placed after the region reserved for
		 * privileged kernel data. */
		/* Note that dot (.) actually refers to the byte offset from the start of
		 * the current section (.privileged_data in this case). As a result, setting
		 * dot (.) to a value sets the size of the section. */
		. = __privileged_data_region_size__;


        . = ALIGN(4);
        *(.ramcode)    
        . = ALIGN(4);
        *(.data)  
        *(.data*)
        . = ALIGN(4);
        *(.mcal_data)
        . = ALIGN(4);
        __sram_data_end__ = .;
    } > int_sram

    __sram_data_rom_end = __sram_data_rom + (__sram_data_end__ - __sram_data_begin__);
    .sram_bss (NOLOAD) :
    {
        . = ALIGN(16);
        __sram_bss_start = .;
        *(.bss)
        *(.bss*)
        . = ALIGN(16);
        *(.mcal_bss)
        . = ALIGN(4);
        __sram_bss_end = .;
    } > int_sram
    /* heap section */        
    .heap (NOLOAD):
    {
    	. += ALIGN(4);
	    _end = .;
	    end = .;
        _heap_start = .;
        . += HEAP_SIZE;
        _heap_end = .;
    } > int_sram
    
    
    .acfls_code_ram :
    {
        acfls_code_ram_start  = .;
        *(.acfls_code_ram)
        acfls_code_ram_stop   = .;
    } > int_sram_fls_rsv

    __non_cacheable_data_rom = __sram_data_rom_end;

    .non_cacheable_data : AT(__non_cacheable_data_rom)
    {
        . = ALIGN(4);
        __non_cacheable_data_start__ = .;
        . = ALIGN(4096);
        __interrupts_ram_start = .;
        . += __interrupts_rom_end - __interrupts_rom_start;    
        . = ALIGN(4);
        __interrupts_ram_end = .;
        *(.mcal_data_no_cacheable)        
        . = ALIGN(4);
        *(.mcal_const_no_cacheable)      
        . = ALIGN(4);
        HSE_LOOP_ADDR = .;
        LONG(0x0);
        __non_cacheable_data_end__ = .;  
    } > int_sram_no_cacheable

	int_results (NOLOAD):
	{
		. = ALIGN(4);
        KEEP(*(.int_results))  
        . += 0x100;
	} > int_sram_results
    
    __non_cacheable_data_rom_end = __non_cacheable_data_rom + (__non_cacheable_data_end__ - __non_cacheable_data_start__);

    .non_cacheable_bss (NOLOAD) :
    {  
        . = ALIGN(16);
        __non_cacheable_bss_start = .;
        *(.mcal_bss_no_cacheable)      
        . = ALIGN(4);
        __non_cacheable_bss_end = .;       
    } > int_sram_no_cacheable
    
    __shareable_data_rom = __non_cacheable_data_rom_end;

    .shareable_data : AT(__shareable_data_rom)
    {
        . = ALIGN(4);
        __shareable_data_start__ = .;
        KEEP(*(.mcal_shared_data)) 
        . = ALIGN(4);
        __shareable_data_end__ = .;  
    } > int_sram_shareable

    __shareable_data_rom_end = __shareable_data_rom + (__shareable_data_end__ - __shareable_data_start__);

    .shareable_bss (NOLOAD) :
    {  
        . = ALIGN(16);
        __shareable_bss_start = .;
        *(.mcal_shared_bss)      
        . = ALIGN(4);
        __shareable_bss_end = .;       
    } > int_sram_shareable

    __Stack_end_c0           = ORIGIN(int_sram_stack_c0);
    __Stack_start_c0         = ORIGIN(int_sram_stack_c0) + LENGTH(int_sram_stack_c0);
    __Stack_end_c1           = ORIGIN(int_sram_stack_c1);
    __Stack_start_c1         = ORIGIN(int_sram_stack_c1) + LENGTH(int_sram_stack_c1);

    __INT_SRAM_START         = ORIGIN(int_sram);
    __INT_SRAM_END           = ORIGIN(ram_rsvd2);
    
    __INT_ITCM_START         = ORIGIN(int_itcm);
    __INT_ITCM_END           = ORIGIN(int_itcm) + LENGTH(int_itcm);
    
    __INT_DTCM_START         = ORIGIN(int_dtcm);
    __INT_DTCM_END           = ORIGIN(int_dtcm) + LENGTH(int_dtcm);
    
    __RAM_SHAREABLE_START    = ORIGIN(int_sram_shareable);
    __RAM_SHAREABLE_END      = ORIGIN(ram_rsvd2)-1;
    __RAM_SHAREABLE_SIZE     = 0xE; /*16 kbyte*/
    __ROM_SHAREABLE_START    = __shareable_data_rom;
    __ROM_SHAREABLE_END      = __shareable_data_rom_end;
    __RAM_NO_CACHEABLE_START = ORIGIN(int_sram_no_cacheable);
    __RAM_NO_CACHEABLE_END   = ORIGIN(int_sram_shareable)-1;
    __RAM_NO_CACHEABLE_SIZE  = 0x10;  /* 64kbyte in power of 2 */
    __ROM_NO_CACHEABLE_START = __non_cacheable_data_rom;
    __ROM_NO_CACHEABLE_END   = __non_cacheable_data_rom_end;
    __RAM_CACHEABLE_START    = ORIGIN(int_sram);
    __RAM_CACHEABLE_END      = ORIGIN(int_sram_no_cacheable)-1;
    __RAM_CACHEABLE_SIZE     = 0x12;  /* 256kbyte in power of 2 */
    __ROM_CACHEABLE_START    = __sram_data_rom;
    __ROM_CACHEABLE_END      = __sram_data_rom_end;
    __ROM_CODE_START         = ORIGIN(int_flash);
    __ROM_DATA_START         = 0x10000000;
    
    
    __BSS_SRAM_START         = __sram_bss_start;
    __BSS_SRAM_END           = __sram_bss_end;
    __BSS_SRAM_SIZE          = __sram_bss_end - __sram_bss_start;
    
    __BSS_SRAM_NC_START      = __non_cacheable_bss_start;
    __BSS_SRAM_NC_SIZE       = __non_cacheable_bss_end - __non_cacheable_bss_start;
    __BSS_SRAM_NC_END        = __non_cacheable_bss_end;

    __BSS_SRAM_SH_START      = __shareable_bss_start;
    __BSS_SRAM_SH_SIZE       = __shareable_bss_end - __shareable_bss_start;
    __BSS_SRAM_SH_END        = __shareable_bss_end;

    __RAM_INTERRUPT_START    = __interrupts_ram_start;
    __ROM_INTERRUPT_START    = __interrupts_rom_start;
    __ROM_INTERRUPT_END      = __interrupts_rom_end;

    __INIT_TABLE             = __init_table;
    __ZERO_TABLE             = __zero_table;
    
    __RAM_INIT               = 1;
    __ITCM_INIT              = 1;
    __DTCM_INIT              = 1;
    
    Fls_ACEraseRomStart         = __acfls_code_rom_start;
    Fls_ACEraseRomEnd           = __acfls_code_rom_end;
    Fls_ACEraseSize             = (__acfls_code_rom_end - __acfls_code_rom_start) / 4; /* Copy 4 bytes at a time*/

    Fls_ACWriteRomStart         = __acfls_code_rom_start;
    Fls_ACWriteRomEnd           = __acfls_code_rom_end;
    Fls_ACWriteSize             = (__acfls_code_rom_end - __acfls_code_rom_start) / 4; /* Copy 4 bytes at a time*/
    
    _ERASE_FUNC_ADDRESS_        = ADDR(.acfls_code_ram);
    _WRITE_FUNC_ADDRESS_        = ADDR(.acfls_code_ram);
    
    __ENTRY_VTABLE              = __ROM_INTERRUPT_START;
	
    __CORE0_VTOR             = __interrupts_rom_start;
    __CORE1_VTOR             = __interrupts_rom_start;

}

 

Can you please guide me with any hint or suggestion to get it working.

 

 

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2 Replies

‎12-11-2022 11:18 PM
1,114 Views
lukaszadrapa
NXP TechSupport
NXP TechSupport

Hi Hemant,

"2. Port.c taken from FreeRTOS GCC Port "ARM_CM4_MPU""

- we have a port and examples directly for S32K3 as a part of S32K3 Reference Software:

https://www.nxp.com/webapp/swlicensing/sso/downloadSoftware.sp?catid=SW32K3-REFSW-D

lukaszadrapa_0-1670825867234.png

So, my suggestion is to start with this port to see if it solves the problem.

Regards,

Lukas

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‎12-12-2022 07:27 AM
1,106 Views
HemantK
Contributor III

Hello, 

 

Many thanks for the response.

 

I already had a look at this and successfully manage to integrate FreeRTOS in our project. 

However the example provided doesn't use MPU aspect of FreeRTOS and that is what I am after.

Hope this helps.

 

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