Gentlemen,
browsing the docs in the root directory reveals very little, and the list archives don't seem to be available on sourceforge, so I am asking the questions here.
I am trying to enable the ECC feature on an 8541 platform, which uses DDR SDRAM. I noticed that there are config flags available just for that: CONFIG_DDR_ECC and CONFIG_DDR_ECC_CMD, used in a few platforms (my port is based on 1.1.6):
# grep CONFIG_DDR_ECC include/configs/*h|grep define include/configs/MPC8349EMDS.h:#define CONFIG_DDR_ECC_CMD /* use DDR ECC user commands */ include/configs/MPC8540ADS.h:#define CONFIG_DDR_ECC /* only for ECC DDR module */ include/configs/MPC8541CDS.h:#define CONFIG_DDR_ECC /* only for ECC DDR module */ include/configs/MPC8548CDS.h:#define CONFIG_DDR_ECC /* only for ECC DDR module */ include/configs/MPC8555CDS.h:#define CONFIG_DDR_ECC /* only for ECC DDR module */ include/configs/MPC8560ADS.h:#define CONFIG_DDR_ECC /* only for ECC DDR module */ include/configs/MPC8641HPCN.h:#define CONFIG_DDR_ECC /* only for ECC DDR module */ include/configs/PM854.h:#define CONFIG_DDR_ECC /* only for ECC DDR module */ include/configs/PM856.h:#define CONFIG_DDR_ECC /* only for ECC DDR module */
intersetingly enough, the only platform which has a CLI command to demonstrate ECC functionality (MPC8349EMDS has CONFIG_DDR_ECC_CMD defined) does not have CONFIG_DDR_ECC defined.
I moved the CLI command code from board/mpc8349emds/mpc8349emds.c into the common directory and modified it to work with both 83xx and 85xx memory configuration registers' layouts.
The thing is that I can't make the ECC errors injection to work, rather, I can't get any ECC errors reported. So, a few questions:
- how do I find out if there was any documentation associated with the CLI command implementation contribution in board/mpc8349emds/mpc8349emds.c?
- have anyone tested ECC implementation on any 85XX platform which have the flag defined. How did you test it, if so?
any input/hints would be highly appreciated,
cheers, Vadim