T2080RDB RCW loading from PBL (NOR FLASH)

[ganesh_sullad]

Hi ,

I am using T2080RDB board with Lauterbach debugger connected, Initially i wanted to load PBL (contains RCW data), into the board and transfer control to the code which reside in the NOR FLASH.

For some reason i am not seeing the board uses RCW from PBL (NOR FLASH region) instead i see hard coded RCW are being used,

The RDB board switch settings are done as per the RDB datasheet to boot from NOR FLASH,
SW1 0001 0011
SW2 1011 1111
SW3 1110 0001

PBL is generated using QCVS, contains RCW data and Jump (command) to the FLASH address.

PBL is stored from 0xE8000000, and code is stored at 0xEF800000

1. What are the things that should be taken care while loading RCW from PBL?

2. What are the must configuration/commands in the PBL?

3. What is the power up sequence and any guide on the PBL?

Any considerations on the memory, CCSR space etc?

Please provide your valuable inputs.

Regards,
Ganesh Sullad

[yipingwang]

1. RCW should be deployed at the beginning for the NOR flash, u-boot should be deployed at the end of NOR flash.

For example, u-boot should be deployed at 0xeff40000 on NOR flash.

2. Please refer to RCW configuration file in t2080rdb folder in the attachment.

3. Please refer to "4.6.1 Power-on reset sequence" in T2080RM.

[ganesh_sullad]

In addition to above described issue, 

The PBL reports an error 0x78, which corresponds to "Data transfer error from memory devices" as per manual. 

Below snap is attached. 

PBL memory snap: 

What could be the issue here?

[yipingwang · Accepted solution]

This could be caused by improper PBL command, for example flush command.