topic Enabling ROM Bypass via using FIT in Embedded Intel Atom® Processors

Enabling ROM Bypass via using FIT

tKim01 — Wed, 06 Nov 2019 13:10:35 GMT

Hi,

I have some questions regarding enabling/using the ROM Bypass for an Apollo Lake-I (E3950) processor.

How can the ROM bypass be enabled in the FIT tool? The setting is greyed out, and when the image is compiled the ROM bypass region is defined as unused.

Does the ROM bypass enable hardware strap (GPIO_39) have any effect when the region is not correctly included into the SPI flash image?

I'm using FIT version 3.1.60.2280, as released with the TXE FW release package 3.1.70.2334.

Thanks in advance,

Re: Enabling ROM Bypass via using FIT

CarlosAM_INTEL — Thu, 07 Nov 2019 06:26:02 GMT

Hello, @tKim01:

Thank you for contacting Intel Embedded Community.

We suggest you follow the procedure stated in Appendix A, on pages 28, 29, and 30 of the Apollo Lake Platform - Intel(R)Trusted Execution Engine [Intel(R)TXE] Firmware Bring-Up User Guide {Revision 1.1, August 2016} that can be found as a reference at:

https://usermanual.wiki/Document/APLIntelRTXEFWBringupGuideV11.128793216/view

Best regards,

@Mæcenas_INTEL.