https://community.nxp.com/t5/Layerscape/LS1043-soft-reset-persistent-register/m-p/1211626#M7338 <P><SPAN>You could&nbsp;execute "fw_printenv" and "fw_setenv" to read and write u-boot environment in Linux before invoke soft reset. About how to create the configuration file, please refer to the last post in&nbsp;<A href="https://community.nxp.com/t5/Layerscape/How-to-build-fw-printenv-and-fw-setenv-for-LS1012AFRWY-OpenWrt/m-p/1012900" target="_blank">https://community.nxp.com/t5/Layerscape/How-to-build-fw-printenv-and-fw-setenv-for-LS1012AFRWY-OpenWrt/m-p/1012900</A></SPAN></P> <P>&nbsp;</P> Thu, 14 Jan 2021 08:51:23 GMT yipingwang 2021-01-14T08:51:23Z https://community.nxp.com/t5/Layerscape/LS1043-soft-reset-persistent-register/m-p/1211160#M7337 <P>Hi,</P><P>I'm running Linux(LSDK19.06 based) on the LS1043 SoC and I need to pass the reboot reason to ATF/u-boot.</P><P>I searched the reference manual for a register that has its value persisted over soft resets but I couldn't find such a register.</P><P>Could you please advise on how to pass some information at Linux reboot to the bootloader stages?</P><P>Thank you!</P> Wed, 13 Jan 2021 14:21:54 GMT https://community.nxp.com/t5/Layerscape/LS1043-soft-reset-persistent-register/m-p/1211160#M7337 sebastianpancea 2021-01-13T14:21:54Z https://community.nxp.com/t5/Layerscape/LS1043-soft-reset-persistent-register/m-p/1211626#M7338 <P><SPAN>You could&nbsp;execute "fw_printenv" and "fw_setenv" to read and write u-boot environment in Linux before invoke soft reset. About how to create the configuration file, please refer to the last post in&nbsp;<A href="https://community.nxp.com/t5/Layerscape/How-to-build-fw-printenv-and-fw-setenv-for-LS1012AFRWY-OpenWrt/m-p/1012900" target="_blank">https://community.nxp.com/t5/Layerscape/How-to-build-fw-printenv-and-fw-setenv-for-LS1012AFRWY-OpenWrt/m-p/1012900</A></SPAN></P> <P>&nbsp;</P> Thu, 14 Jan 2021 08:51:23 GMT https://community.nxp.com/t5/Layerscape/LS1043-soft-reset-persistent-register/m-p/1211626#M7338 yipingwang 2021-01-14T08:51:23Z https://community.nxp.com/t5/Layerscape/LS1043-soft-reset-persistent-register/m-p/1211953#M7342 <P>Hi <a href="https://community.nxp.com/t5/user/viewprofilepage/user-id/52411">@yipingwang</a> ,</P><P>Thank you for your reply!</P><P>Using "fw_setenv" tool, means storing the variable into non-volatile memory.</P><P>What I was asking for, is a CPU register or RAM zone that is persistent between reboots, and is cleared only when the SoC is powered down.</P><P>Other SoCs have such registers, for example IMX6: <A href="https://community.nxp.com/t5/i-MX-Processors/iMX6-persistent-data-storage/m-p/648339#M99095" target="_blank" rel="noopener">https://community.nxp.com/t5/i-MX-Processors/iMX6-persistent-data-storage/m-p/648339#M99095</A></P><P>Any idea of a similar feature on LS1043?</P> Thu, 14 Jan 2021 21:27:20 GMT https://community.nxp.com/t5/Layerscape/LS1043-soft-reset-persistent-register/m-p/1211953#M7342 sebastianpancea 2021-01-14T21:27:20Z https://community.nxp.com/t5/Layerscape/LS1043-soft-reset-persistent-register/m-p/1216784#M7354 <P>Please refer to "DCFG_CCSR_RSTRQSR1" in LS1043 Reference Manual.</P> Tue, 19 Jan 2021 10:03:03 GMT https://community.nxp.com/t5/Layerscape/LS1043-soft-reset-persistent-register/m-p/1216784#M7354 yipingwang 2021-01-19T10:03:03Z https://community.nxp.com/t5/Layerscape/LS1043-soft-reset-persistent-register/m-p/1216790#M7355 <P>Hi <a href="https://community.nxp.com/t5/user/viewprofilepage/user-id/52411">@yipingwang</a> ,</P><P>I see that this register has multiple read only bitfields.</P><P>It also has "Reserved" zones that are marked as writable.</P><P>So if I write to these "Reserved" zones(for example bits 24-31) should I expect the values to be persistent between resets?</P> Tue, 19 Jan 2021 10:09:42 GMT https://community.nxp.com/t5/Layerscape/LS1043-soft-reset-persistent-register/m-p/1216790#M7355 sebastianpancea 2021-01-19T10:09:42Z https://community.nxp.com/t5/Layerscape/LS1043-soft-reset-persistent-register/m-p/1216799#M7356 <P>I tried to write to this register in the "Reserved" zones but it doesn't work</P> Tue, 19 Jan 2021 10:18:33 GMT https://community.nxp.com/t5/Layerscape/LS1043-soft-reset-persistent-register/m-p/1216799#M7356 sebastianpancea 2021-01-19T10:18:33Z