Restructures early code path on ieee1275 to unify grub_main() as
the first C function that is executed in every platform.
* include/grub/ieee1275/ieee1275.h (grub_ieee1275_init): New prototype.
* kern/i386/ieee1275/startup.S (_start): Jump to grub_main() instead of
cmain().
* kern/powerpc/ieee1275/crt0.S (_start): Likewise.
* kern/ieee1275/cmain.c (cmain): Rename to ...
* kern/ieee1275/cmain.c (grub_ieee1275_init): ... this.
* kern/ieee1275/init.c (grub_machine_init): Call grub_ieee1275_init()
at the beginning.
* conf/i386-ieee1275.rmk (kernel_elf_SOURCES): Add `machine/loader.h'
and `machine/memory.h'.
(pkglib_MODULES): Add `multiboot.mod' and `_multiboot.mod'.
(_multiboot_mod_SOURCES): New variable.
(_multiboot_mod_CFLAGS): Likewise.
(_multiboot_mod_LDFLAGS): Likewise.
(multiboot_mod_SOURCES): Likewise.
(multiboot_mod_CFLAGS): Likewise.
(multiboot_mod_LDFLAGS): Likewise.
* include/grub/i386/ieee1275/loader.h: New file.
* include/grub/i386/ieee1275/machine.h: Likewise.
* include/grub/i386/ieee1275/memory.h: Likewise.
* include/grub/i386/pc/init.h (grub_os_area_addr): Remove (redundant)
variable declaration.
(grub_os_area_size): Likewise.
* kern/i386/ieee1275/init.c (grub_os_area_addr, grub_os_area_size)
(grub_lower_mem, grub_upper_mem): New variables.
(grub_stop_floppy): New function (just to make
grub_multiboot2_real_boot() happy).
* kern/i386/ieee1275/startup.S: Include `<grub/machine/memory.h>',
`<grub/cpu/linux.h>', `<multiboot.h>' and `<multiboot2.h>'.
(grub_stop): New function.
Include `"../realmode.S"' and `"../loader.S"'.
* loader/multiboot_loader.c: Include `<grub/machine/machine.h>'.
Replace `__i386__' #ifdefs with `GRUB_MACHINE_PCBIOS'.
* loader/powerpc/ieee1275/multiboot2.c (grub_mb2_arch_boot): On i386,
rely on grub_multiboot2_real_boot() for final boot.
PowerPC changes provided by Pavel Roskin.
* kern/powerpc/ieee1275/cmain.c (cmain): Don't take any arguments.
* kern/powerpc/ieee1275/crt0.S: Store r5 in grub_ieee1275_entry_fn,
don't rely on cmain() doing it.
* kern/i386/ieee1275/startup.S (_start): Store %eax in
grub_ieee1275_entry_fn, don't rely on cmain() doing it.
