2014-02-13 1:56 GMT+01:00 Rommel G Custodio sessyargc+u-boot@gmail.com:

Dear Franck Jullien,

Franck Jullien <franck.jullien <at> gmail.com> writes:

...

Hi,

I'd like to know if I have understood it correctly.

When first time booting from NOR, the RCW and PBI must be written using the JTAG. The last instruction of the PBI must be a jump (0x13_8080) to the user's code (uboot here).

You should not need to bring out the JTAG.

The build process for other FSL boards that require RCW (i.e. P5040) can create a single binary that includes RCW, PBI, and u-boot.

BUT the T1040 right now does not have a build target that creates this binary! It seems FSL hasn't gotten about to creating it yet (not in mailine, not in patchworks, none in the FSL SDK).

...

Am I right ?

Best regards,

Franck.

All the best, Rommel

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I did see other platforms generates PBL images with RCW and PBI built-in. However, this is always with CONFIG_RAMBOOT_PBL set (SPI, NAND or SD-CARD boot). This is the memory map described in the t104xrdb/README file:

NOR Flash memory Map --------------------- 163 Start End Definition Size 164 0xEFF40000 0xEFFFFFFF u-boot (current bank) 768KB .... 177 0xE8000000 0xE801FFFF RCW (current bank) 128KB

For me, it means the RCW will not be included in the u-boot binary.

Franck.