Dear all,
We want to use Secure JTAG mode.
We set JTAG_SMOD to 0x01 to put SJC in Secure JTAG mode.
(JTAG_SMOD=0x01 / SJC_DISABLE=0 / BOOT_CFG_LOCK=0x1x)
In addition, we understand that it is necessary to set HAB_JDE of OCOTP_SCSn register to "1".
The following is explained in OCOTP_SCSn register.
"This register holds volatile configuration values that can be set and locked by trusted software."
We cannot find a method to make trusted software.
Would you tell me the method to make trusted software?
May I have advice?
Best Regards,
Yuuki
Solved! Go to Solution.
Hi Yuuki
"trusted software" is TrustZone concept which provides virtualization-two virtual
machines: Secure and Normal Worlds (processor modes). Description can
be found in Chapter 53 TrustZone Address Space Controller (TZASC) i.MX6UL Reference Manual,
Chapter 1 Security Overview Security Reference Manual
Q&A: How is mx6 PMIC_ON_REQ under SW control?
Best regards
igor
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Hi Yuuki
"trusted software" is TrustZone concept which provides virtualization-two virtual
machines: Secure and Normal Worlds (processor modes). Description can
be found in Chapter 53 TrustZone Address Space Controller (TZASC) i.MX6UL Reference Manual,
Chapter 1 Security Overview Security Reference Manual
Q&A: How is mx6 PMIC_ON_REQ under SW control?
Best regards
igor
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------
Dear Igor-san,
Thank you for your quick response.
Is there the sample cord to put processor mode in the secure world?
Best Regards,
Yuuki
Hi Yuuki
I am not aware of i.MX6UL example, please look at arm :
Best regards
igor
Dear Igor-san,
Thank you for your support.
In addition, would you tell me about the following contents?
In Normal World which is not trusted software, can HAB_JDE bit be set?
Best Regards,
Yuuki
Hi Yuuki
yes it can be set in Normal World
Best regards
igor