What is right procedure to modify linker for bootloader in RTD3.0.0?

[jerryrig]

I am trying to update linker so that my application can be used with uds bootloader 2.0.0. However whenever i make changes in linker the application boot fails. My question here is what is right sequence / steps to modify linker for bootloader.

I have few question with linker and system MPU, what is purpose of following code, and how does it behave when application Address is modified,

system.c
.
.
.
    /* Program flash */
    rbar[14]=(uint32)((uint32)__ROM_CODE_START + 0x400000UL);
#if defined(S32K396) || defined(S32K394)
    rasr[14]=0x070B0029UL; /* Size: import information from linker symbol, Type: Normal, Inner Cache Policy: Inner write-back, write and read allocate, Outer Cache Policy: Outer write-back. write and read allocate, Shareable: No, Privileged Access: Read-Only, Unprivileged Access: Read-Only */
#elif defined(S32K358) || defined(S32K388) || defined(S32K328) || defined(S32K338) || defined(S32K348)
    rasr[14]=0x070B002BUL; /* Size: import information from linker symbol, Type: Normal, Inner Cache Policy: Inner write-back, write and read allocate, Outer Cache Policy: Outer write-back. write and read allocate, Shareable: No, Privileged Access: Read-Only, Unprivileged Access: Read-Only */
#else
    rasr[14]=0UL;
#endif
    

Why is int vector is moved from int_sram_no_cacheable in RTD2.0 to int_dtcm section in RTD3.0, does this need to be modified for bootloader?

    .int_vector :
    {
        . = ALIGN(2048);
        __interrupts_ram_start = .;
        . += __interrupts_init_end - __interrupts_init_start;
        . = ALIGN(4);
        __interrupts_ram_end = .;
    } > int_dtcm

Are there any migration steps for UDS on RTD3.0?

[VaneB]

Hi @jerryrig 

There are demo applications available that showcase the usage of the Bootloader Jump to Application using RTD Version 3.0.0. I suggest reviewing these, as they are for a different device but could serve as a good starting point and reference for your application.

Example S32K312 Bootloader to Application Jump DS3.5 RTD300

Example S32K324 Bootloader to Application Jump DS3.5 RTD300

Additionally, for a better understanding of the MPU's register usage, please refer to the Arm Cortex-M7 documentation.

MPU Region Base Address Register

MPU Region Number Register

Could you also clarify the changes made to the origin address and size of the int_pflash?

BR, VaneB

[jerryrig]

This is screenshot of project after modifying flash address in linker in RTD3.0.0. I have also attached the linker file.