> -----Original Message----- > From: Josh Boyer [mailto:[EMAIL PROTECTED] > Sent: Thursday, June 26, 2008 12:07 PM > To: Stephen Neuendorffer > Cc: [EMAIL PROTECTED]; John Linn; [EMAIL PROTECTED]; [EMAIL PROTECTED]; > [EMAIL PROTECTED] > Subject: RE: [PATCH] powerpc/bootwrapper: Add documentation of boot wrappertargets > > On Thu, 2008-06-26 at 09:48 -0700, Stephen Neuendorffer wrote: > > My unanswered questions: > > > > 1) Why are there 4 different types of targets that embed a device tree? > > I assume they differ in how they are started loaded, but (unfortunately) > > the names are meaningless (With the exception of cuImage, which is only > > cryptic.. :) If I'm adding support for a new board, which should I use? > > They are all needed to deal with different firmwares.
Where 'firmware' really means 'method of invoking the kernel' > treeImage is for OpenBIOS based boards (Ebony, Walnut, some boards > running PIBS can also use this). This firmware requires a special > header on the image file. So it's not an elf? or it is an .elf? maybe it should be 'openBiosImage'? > cuImage is for boards running an older U-Boot that does not understand > device trees. Forgive my ignorance here, but what specifically does this imply? As far as I can tell, generally speaking, some of the board-specific information is passed into the boot wrapper, which then stuffs it into the device tree. > uImage is for device-tree aware U-Boot versions And this differs from above because it gets a device tree passed in, which uboot has already stuffed correctly. > dtbImage is used for boards that can take an ELF zImage, but still need > a dtb provided. > > simpleImage, not sure here. So both of these are elfs... but how do they differ? Is it only in how the right head.s file gets picked up? Steve This email and any attachments are intended for the sole use of the named recipient(s) and contain(s) confidential information that may be proprietary, privileged or copyrighted under applicable law. If you are not the intended recipient, do not read, copy, or forward this email message or any attachments. Delete this email message and any attachments immediately. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
