T4240RDB Machine with Local Access Window Configuration

[vinothkumars]

Hi All,

I am using T4240RDB-64B Machine. I want to configure Local Access Window (LAW) for Dual Data Rate (DDR), Integrated Flash Controller (IFC) and DCSR. 

I am using CodeWarrior Flash Programmer and Lauterbach Trace32 Debugger for Debugging support. 

Please give the detailed explanation for Configure the LAW register to DDR and IFC.

Thank you for all ......!

Regards, VinothS

[alexander_yakov · Accepted solution]

To configure Local access window for each mentioned memory space, you have to set 3 registers - LAW_LAWBARHn, LAW_LAWBARLn and LAW_LAWARn. For detailed field descriptions in these registers please look T4240 Reference Manual, Section 2.4

The example configuration for T4240RDB can be taken from CodeWarrior target initialization file for this board:

        ## LAW0 to DDRC1
        # LAWBARH
        mem [CCSR_ADDR 0x000C00] = 0x00000000
        # LAWBARL
        mem [CCSR_ADDR 0x000C04] = 0x00000000
        # LAWAR
        if {$processor_revision == 1} {
                # Memory complex 1
                mem [CCSR_ADDR 0x000C08] = 0x810000${DDR_LAW_SIZE}
        } else {
                # Interleaved Memory Complex 1-3
                mem [CCSR_ADDR 0x000C08] = 0x817000${DDR_LAW_SIZE}
        }

       ## LAW3 to IFC - NAND
       # LAWBARH
       mem [CCSR_ADDR 0x000C30] = 0x00000000
       # LAWBARL
       mem [CCSR_ADDR 0x000C34] = 0xFF800000
       # LAWAR
       mem [CCSR_ADDR 0x000C38] = 0x81f00013

       ## LAW4 to DCSR
       # LAWBARH
       mem [CCSR_ADDR 0x000C40] = 0x00000000
       # LAWBARL
       mem [CCSR_ADDR 0x000C44] = 0xC0000000
       # LAWAR
       mem [CCSR_ADDR 0x000C48] = 0x81D0001c

Please look [your CodeWarrior installation folder] \PA\PA_Support\Initialization_Files\QorIQ_T4\T4240RDB_init_core_cacheon.tcl 

Have a great day,
Alexander
TIC

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[vinothkumars]

Hi Alexander,

Thank you for quick reply.

As per your suggestion, T4240RDB_init_core_cacheon.tcl  

The following file applicable for Lauterbach script also.

LAW0 to DDR

LAW4 to DCSR

Is it right ? 

Thanks & Regards,

VinothS

[alexander_yakov]

Yes, but - it is up to designer, which number of local access window to use for which target.

In this CodeWarrior script this is done in this way. In your case you can use another numbers.

[vinothkumars]

Hi Alexander,

Thank you for your reply....

Regards,

VinothS