On Wed, Apr 11, 2018 at 3:39 PM, Raymond Yeung <[email protected]> wrote:
> I currently have a board that uses Intel Xeon D (previously codenamed > Broadwell DE). It boots up with BIOS/UEFI. I 'm exploring other oot-up > options here. > > > I'm not familiar with this early stage of system initialization. It seems > BIOS/UEFI to Linux needs to use PXE, with the need to configure DHCP (and > possibly Proxy DHCP), TFTP server PXELINUX, Linux initial RAM disk > (initrd) configuration file, and then Linux. Previously, I'd been using > Coreboot/UBOOT environment (as a user, not developer). Prerequisite seemed > much simpler. > > > A few questions - > > > > 1. Is there even a coreboot support for this CPU already available and > stable that I could download and reflash? Or are we talking about some > serious re-development? > > Yes - See src/mainboard/intel/camelbackmountain_fsp/ for the reference platform. You'll need the Intel FSP blob from https://github.com/IntelFsp/FSP/tree/Broadwell-DE. You'll also need microcode which you can download from developer.intel.com. > > 1. Is it possible to go from BIOS/UEFI to UBOOT (on-board)? How? > > I haven't tried uboot as a payload, but yes, it is possible. There are other options available to consider depending on your use case. > > 1. Support for Secure Boot - would one approach be simpler than > another? > > It depends on what you want/need. Philipp Deppenwiese is working on "vboot" (Google's verified boot implementation) integration with upstream: https://review.coreboot.org/#/c/coreboot/+/24993/ More about that approach here: https://www.chromium.org/chromium-os/chromiumos-design-docs/verified-boot > > 1. Am I even on the right track thinking this way? > > You seem to be off to a good start :-)
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