RM57L843: Erase, program and read back the flash with cache enable/disable

Hello TI engineer:

    In boot mode of my application, when in the bootloader mode, MPU is disabled successfully. But when the cacheDisable function as shown followed is called,  the MCU abnormal and fly.

;-------------------------------------------------------------------------------
; Disable caches

        .def  _cacheDisable_
        .asmfunc

_cacheDisable_

        stmfd sp!, {r1}

        MRC   p15, #0, R1, c1, c0, #0   ; Read System Control Register configuration data
        BIC   R1, R1, #0x1 <<12         ; instruction cache disable
        BIC   R1, R1, #0x1 <<2          ; data cache disable
        DSB
        MCR   p15, #0, R1, c1, c0, #0   ; disabled cache RAMs
        ISB

        ldmfd sp!, {r1}

        bx    lr
        .endasmfunc

 After trying  erase, program and read back the flash with cache enable, I found the erase and program may be OK, but the read back contents are random.

I guess that the read will read from the cache memory instead of the Flash.

Q:

1) How to disable the cache?

2) Can I run the bootloader with cache enable? How to fix the read back problem?

Thank you.