2009/8/29 Bean <bean12...@gmail.com>: > On Sat, Aug 29, 2009 at 3:58 PM, Michal Suchanek<hramr...@centrum.cz> wrote: >> 2009/8/29 Bean <bean12...@gmail.com>: >>> On Sat, Aug 29, 2009 at 2:27 PM, Vladimir 'phcoder' >>> Serbinenko<phco...@gmail.com> wrote: >>>>> Actually, I think the correct handling is to first bless a boot >>>>> directory (storing the directory id in header), then bless a boot file >>>>> (add +tbxi attribute), that's why the bless command in OSX needs needs >>>>> both --folder and --file option. >>>> AFAIK --file has no effect for intel macs. >>> >>> Hi, >>> >>> After more testing, I believe the booting process works like this: >>> >>> One important difference between openfirmware and efi is that >>> openfirmware stores file path in nvram, while efi stores device path. >>> The default boot file for openfirmware is like this: >>> >>> device:\\+tbxi >>> >>> Which means the files which +tbxi attribute in the blessed directory. >>> >>> But efi only store the boot device (uuid), so it needs to use the >>> blessed file to boot. >>> >>> So to distinguish these two situation, we can have too options for bless: >>> >>> bless [--bootinfo PATH_TO_BOOTX] [[--bootefi PATH_TO_BOOTEFI] >>> >>> --bootinfo set the blessed directory plus +tbxi, while --bootefi set >>> the blessed file, this way we could specify different boot files for >>> openfirmware and efi, something like this: >>> >>> bless --bootinfo /grub.elf --bootefi grub.efi >>> >> >> Wouldn't it be possible to do a check in bless that determines if the >> file is for openfirmware of efi? > > Hi, > > I think it would be better to specify the type explicitly, as there > are multiple formats supports by both platform. OpenFirmware support > bootinfo, xcoff and elf, while efi support i386-efi, x86_64-efi and > fat binary. >
They are multiple but different. I guess automatic detection would be nice to have but writing detection for multiple formats might take some time so it would be better to get a bless command without detection initially and possibly add detection later. Thanks Michal _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org http://lists.gnu.org/mailman/listinfo/grub-devel
