topic Re: How to check SEC_MON status in Linux ? in Layerscape

topic Re: How to check SEC_MON status in Linux ? in Layerscape https://community.nxp.com/t5/Layerscape/How-to-check-SEC-MON-status-in-Linux/m-p/1616357#M12041 <P>The recent released LSDK comply with AT-F(ARM Trusted Firmware), so secure fuse is reading on EL3. Since Linux is running on EL2 and EL1, it does not have read access.</P> <P>A option for you is to use JTAG(CCS+CodeWarrior TAP).</P> <P>You could use the following CCS commands</P> <P>% delete all</P> <P>% config cc cwtap</P> <P>% ccs::config_chain {lx2160a dap}</P> <P>% display ccs::get_config_chain</P> <P>% disp ccs::read_mem 86 0x1e90010 4 0 16                   </P> <P>+0       +4       +8       +C </P> <P>[0x01E90010] 00000000 88002B00 80000000 00000000 </P> <P>[0x01E90020] 00000000 00000000 00000000 00000000 </P> <P>[0x01E90030] 00000000 00000000 00000000 00000000 </P> <P>[0x01E90040] 00000000 00000000 00000000 00000008   </P> <P>Note "86" above is chain position for SAP2 on my <STRONG>LX2160ARDB</STRONG> board</P> Thu, 16 Mar 2023 03:41:42 GMT yipingwang 2023-03-16T03:41:42Z How to check SEC_MON status in Linux ? https://community.nxp.com/t5/Layerscape/How-to-check-SEC-MON-status-in-Linux/m-p/1616282#M12040 <P>Hi,</P><P>We want to check LX2160ARDB security monitor (SEC_MON) status in Linux. </P><P>According to LX2160A reference manual, we try to read SecMon address (0x1E9_0000) by devmem2 command as below but get the same value (0x0) at secure and non-secure mode.</P><P>root@localhost:~# devmem2 0x01e90000<BR />/dev/mem opened.<BR />Memory mapped at address 0xffff8aba8000.<BR />Value at address 0x1E90000 (0xffff8aba8000): 0x0</P><P>Is it correct?</P><P>How to check SEC_MON status in Linux ?</P><P> </P><P>Thank you,</P><P>Jeffrey</P> Thu, 16 Mar 2023 01:29:42 GMT https://community.nxp.com/t5/Layerscape/How-to-check-SEC-MON-status-in-Linux/m-p/1616282#M12040 Jeffrey_Lai 2023-03-16T01:29:42Z Re: How to check SEC_MON status in Linux ? https://community.nxp.com/t5/Layerscape/How-to-check-SEC-MON-status-in-Linux/m-p/1616357#M12041 <P>The recent released LSDK comply with AT-F(ARM Trusted Firmware), so secure fuse is reading on EL3. Since Linux is running on EL2 and EL1, it does not have read access.</P> <P>A option for you is to use JTAG(CCS+CodeWarrior TAP).</P> <P>You could use the following CCS commands</P> <P>% delete all</P> <P>% config cc cwtap</P> <P>% ccs::config_chain {lx2160a dap}</P> <P>% display ccs::get_config_chain</P> <P>% disp ccs::read_mem 86 0x1e90010 4 0 16                   </P> <P>+0       +4       +8       +C </P> <P>[0x01E90010] 00000000 88002B00 80000000 00000000 </P> <P>[0x01E90020] 00000000 00000000 00000000 00000000 </P> <P>[0x01E90030] 00000000 00000000 00000000 00000000 </P> <P>[0x01E90040] 00000000 00000000 00000000 00000008   </P> <P>Note "86" above is chain position for SAP2 on my <STRONG>LX2160ARDB</STRONG> board</P> Thu, 16 Mar 2023 03:41:42 GMT https://community.nxp.com/t5/Layerscape/How-to-check-SEC-MON-status-in-Linux/m-p/1616357#M12041 yipingwang 2023-03-16T03:41:42Z