In T2080 Processor, where need to place the RCW word in NOR FLash ?

[karunakaranradh]

Integrated Flash Controller (IFC) CS0 of T2080 processor is connected to 256 MB of NOR Flash in our processor board. The reset configuration signal(cfg_rcw_src[0:8]) is configured NOR Flash as Reset configuration word (RCW) source in Power-On Reset(POR) sequence.

If NOR flash is selected as RCW source, Which address is generated by the PBL(Pre Bootloader) to read the RCW data from the NOR Flash?

[addiyi]

The easy way is to use QCVS\PBL tool which is free of charge. But, you can use also Yocto. For this you should go to \build_t2080rdb\tmp\work\t2080rdb-fsl-linux\rcw\git-r0\git\ and modify the .rcw file and build the new rcw by running the rcw.py script.

Adrian

[addiyi · Accepted solution]

When NOR is used as RCW source, RCW must be place at the beginning of NOR flash. Please take a look on Programming a New U-boot, RCW, FMan Microcode, for more information.

Adrian

[karunakaranradh]

whether Pre Bootloader(PBL) instruct the IFC to generate the address as 0x00000000(32bit) or some other address it will generate to read the RCW data?

In our board, RCW source input signal "cfg_rcw_src[0:8]" is to be configure as 0_0010_0101 (i.e.., 16 bit NOR flash, 4 bit left shift and ALE before CS). In this case, it will read the data from NOR Flash.

[amarnathmb]

Hi Karunakaran,

How did you generate RCW.bin file for NOR flash boot?

Regards,

Amarnath

[addiyi]

RCW can be taken from SDK build or you can use QCVS\PBL tool for generate one.

Adrian

[amarnathmb]

Hi Adrian,

I have a custom board based on t2080rdb and uses NOR flash to boot vxWorks. We have changed RCW configurations to suite our SerDes requirement. Can i generate rcw.bin for my custom rcw.cfg file by using Yocto?

Regards,

Amarnath