On 10/27/2016 02:47 AM, Calvin Johnson wrote: > Hi York, > >> -----Original Message----- >> From: york sun >> Sent: Wednesday, October 26, 2016 10:09 PM >> To: Calvin Johnson <calvin.john...@nxp.com>; Prabhakar Kushwaha >> <prabhakar.kushw...@nxp.com>; Pratiyush >> Srivastava <pratiyush.srivast...@nxp.com>; u-boot@lists.denx.de; Mingkai Hu >> <mingkai...@nxp.com> >> Cc: Hou Zhiqiang <zhiqiang....@freescale.com> >> Subject: Re: [PATCH] armv8/ls1043a: Add the OCRAM initialization >> >> On 10/24/2016 09:30 PM, Calvin Johnson wrote: >> >>>>>> I wonder why we don't see ECC errors before this patch. We have >>>>>> LS1043A boots on NAND, SD. >>>>>> >>>>> >>>>> OCRAM has a requirement of initializing before first time "read". >>>>> If user reads OCRAM before **initializing**; ECC error will come. >>>>> (u-boot is not handling this error for now). >>>>> >>>>> I can only guess the reason of not seeing this error as OCRAM never read >>>>> before any write. >>>>> Even in case of Stack, data is first written and then read. >>>>> >>>> >>>> Is there a case you want to read from OCRAM before writing anything to it? >>>> Why don't we need to do so for SPL or >> LSCH3? >>> >>> This issue will be seen ONLY in secure boot. It was reproduced on LS1043A >>> also. >>> >> >> How about LSCH3? We have LS2080A secure boot. > > I don't know about LS2080A. Prabhakar or Ruchika(copied) may be able to > comment on this. >
Please follow up on this thread. We need to understand when and where OCRAM needs to be cleared. York _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
