Re: [coreboot] Coreboot with a Linux kernel and initramfs as payload.

[Patrick Georgi]

      Am 31.08.2012 16:41, schrieb ron minnich:
  It's been several years since I've done this.
However, I don't believe
 mkelfimage is needed.

 You need to build a kernel image that contains the kernel, initramfs,
 and command line args. If my memory is correct, this is now possible
 with the standard kernel build process and it creates and ELF file.
 Since cbfstool can parse and ELF file, you should be able to use the
 standard coreboot flow.
That won't work since Linux still requires the
"bootblock" at 0x7d000 
(or whereever that was). You only get that when using a "linux" loader.

Still, mkelfimage isn't exactly a well thought out tool. Take an ELF 
linux image and add the bootblock section and you avoid a copy on 
runtime and lots of complication of mkelfimage (eg. that stub it adds).
Never found the time to implement that, though.


Patrick

Coreboot with a Linux kernel and initramfs as payload.

[ron minnich]

      On Fri, Aug 31, 2012 at 8:41 AM, Patrick Georgi <patrick(a)georgi-clan.de> wrote:

  That won't work since Linux still requires the
"bootblock" at 0x7d000 (or
 whereever that was). You only get that when using a "linux" loader.
in linuxbios days I never used that. I jumped to the kernel at the
32-bit entry point at 100020.

ron