[U-Boot] [PATCH] ppc4xx: Add "ecctest" command to test/simulate ECC errors

[Stefan Roese <sr@denx.de>]

On Wednesday 21 July 2010 19:06:10 Stefan Roese wrote:
> This patch adds the "ecctest" command to test and simulate ECC errors
> (single bit and/or double bit) while running from SDRAM. Currently only
> the IBM DDR2 controller is supported (405EX, 440SP(e), 460EX/GT).
> 
> This is done by copying and calling functions, modifying the SDRAM
> controller operation mode, in internal SRAM/OCM.
> 
> For correctable ECC errors (single bit) only the status will be printed
> since the DDR2 controller doesn't provide the faulting address:
> 
> => ecctest 1000000 1
> Using address 01000000 for 1 bit ECC error injection
> ECC: Correctable error
> 
> Uncorrectable ECC errors (double bit) will also display the faulting
> address:
> 
> => ecctest 1000000 2
> Using address 01000000 for 2 bit ECC error injection
> ECC: Uncorrectable error at 0x0001000000
> 
> To enable this "ecctest" function you need to define CONFIG_CMD_ECCTEST
> in the board config header.
> 
> Tested on katmai and t3corp.

Applied to u-boot-ppc4xx/master. Thanks.

Cheers,
Stefan

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