8a5a57de1c
Since boot partition was not specified, grub tools try to detect it automatically. This patch add an option to force it. Signed-off-by: Jérôme Pouiller <jezz@sysmic.org> Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Tested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
142 lines
4.6 KiB
Plaintext
142 lines
4.6 KiB
Plaintext
config BR2_TARGET_GRUB2
|
|
bool "grub2"
|
|
depends on BR2_i386 || BR2_x86_64
|
|
help
|
|
GNU GRUB is a Multiboot boot loader. It was derived from
|
|
GRUB, the GRand Unified Bootloader, which was originally
|
|
designed and implemented by Erich Stefan Boleyn. GRUB 2 has
|
|
replaced what was formerly known as GRUB (i.e. version
|
|
0.9x), which has, in turn, become GRUB Legacy.
|
|
|
|
Amongst others, GRUB2 offers EFI support, which GRUB Legacy
|
|
doesn't provide.
|
|
|
|
Notes on using Grub2 for BIOS-based platforms
|
|
=============================================
|
|
|
|
1. Create a disk image
|
|
dd if=/dev/zero of=disk.img bs=1M count=32
|
|
2. Partition it (either legacy or GPT style partitions work)
|
|
cfdisk disk.img
|
|
- Create one partition, type Linux, for the root
|
|
filesystem. The only constraint is to make sure there
|
|
is enough free space *before* the first partition to
|
|
store Grub2. Leaving 1 MB of free space is safe.
|
|
3. Setup loop device and loop partitions
|
|
sudo losetup -f disk.img
|
|
sudo partx -a disk.img
|
|
4. Prepare the root partition
|
|
sudo mkfs.ext3 -L root /dev/loop0p1
|
|
sudo mount /dev/loop0p1 /mnt
|
|
sudo tar -C /mnt -xf output/images/rootfs.tar
|
|
sudo umount /mnt
|
|
5. Install Grub2
|
|
./output/host/usr/sbin/grub-bios-setup \
|
|
-b ./output/host/usr/lib/grub/i386-pc/boot.img \
|
|
-c ./output/images/grub.img -d . /dev/loop0
|
|
6. Your disk.img is ready!
|
|
|
|
To test your BIOS image in Qemu:
|
|
|
|
qemu-system-{i386,x86-64} -hda disk.img
|
|
|
|
Notes on using Grub2 for EFI-based platforms
|
|
============================================
|
|
|
|
1. Create a disk image
|
|
dd if=/dev/zero of=disk.img bs=1M count=32
|
|
2. Partition it with GPT partitions
|
|
cgdisk disk.img
|
|
- Create a first partition, type EF00, for the
|
|
bootloader and kernel image
|
|
- Create a second partition, type 8300, for the root
|
|
filesystem.
|
|
3. Setup loop device and loop partitions
|
|
sudo losetup -f disk.img
|
|
sudo partx -a /dev/loop0
|
|
4. Prepare the boot partition
|
|
sudo mkfs.vfat -n boot /dev/loop0p1
|
|
sudo mount /dev/loop0p1 /mnt
|
|
sudo cp -a output/images/efi-part/* /mnt/
|
|
sudo cp output/images/bzImage /mnt/
|
|
sudo umount /mnt
|
|
5. Prepare the root partition
|
|
sudo mkfs.ext3 -L root /dev/loop0p2
|
|
sudo mount /dev/loop0p2 /mnt
|
|
sudo tar -C /mnt -xf output/images/rootfs.tar
|
|
sudo umount /mnt
|
|
6 Cleanup loop device
|
|
sudo partx -d /dev/loop0
|
|
sudo losetup -d /dev/loop0
|
|
7. Your disk.img is ready!
|
|
|
|
To test your EFI image in Qemu:
|
|
|
|
1. Download the EFI BIOS for Qemu
|
|
Version IA32 or X64 depending on the chosen Grub2
|
|
platform (i386-efi vs. x86-64-efi)
|
|
http://sourceforge.net/projects/edk2/files/OVMF/
|
|
2. Extract, and rename OVMF.fd to bios.bin and
|
|
CirrusLogic5446.rom to vgabios-cirrus.bin.
|
|
3. qemu-system-{i386,x86-64} -L ovmf-dir/ -hda disk.img
|
|
4. Make sure to pass pci=nocrs to the kernel command line,
|
|
to workaround a bug in the EFI BIOS regarding the
|
|
EFI framebuffer.
|
|
|
|
http://www.gnu.org/software/grub/
|
|
|
|
if BR2_TARGET_GRUB2
|
|
|
|
choice
|
|
prompt "Platform"
|
|
|
|
config BR2_TARGET_GRUB2_I386_PC
|
|
bool "i386-pc"
|
|
help
|
|
Select this option if the platform you're targetting is a
|
|
x86 or x86-64 legacy BIOS based platform.
|
|
|
|
config BR2_TARGET_GRUB2_I386_EFI
|
|
bool "i386-efi"
|
|
help
|
|
Select this option if the platform you're targetting has a
|
|
32 bits EFI BIOS. Note that some x86-64 platforms use a 32
|
|
bits EFI BIOS, and this option should be used in this case.
|
|
|
|
config BR2_TARGET_GRUB2_X86_64_EFI
|
|
bool "x86-64-efi"
|
|
help
|
|
Select this option if the platform you're targetting has a
|
|
64 bits EFI BIOS.
|
|
|
|
endchoice
|
|
|
|
if BR2_TARGET_GRUB2_I386_PC
|
|
|
|
config BR2_TARGET_GRUB2_BOOT_PARTITION
|
|
string "boot partition"
|
|
default "hd0,msdos1"
|
|
help
|
|
Specify the partition where the /boot/grub/grub.cfg file is
|
|
located. Use 'hd0,msdos1' for the first partition of the
|
|
first disk if using a legacy partition table, or 'hd0,gpt1'
|
|
if using GPT partition table.
|
|
|
|
endif # BR2_TARGET_GRUB2_I386_PC
|
|
|
|
config BR2_TARGET_GRUB2_BUILTIN_MODULES
|
|
string "builtin modules"
|
|
default "boot linux ext2 fat part_msdos part_gpt normal biosdisk" if BR2_TARGET_GRUB2_I386_PC
|
|
default "boot linux ext2 fat part_msdos part_gpt normal efi_gop" \
|
|
if BR2_TARGET_GRUB2_I386_EFI || BR2_TARGET_GRUB2_X86_64_EFI
|
|
|
|
config BR2_TARGET_GRUB2_BUILTIN_CONFIG
|
|
string "builtin config"
|
|
help
|
|
Path to a Grub 2 configuration file that will be embedded
|
|
into the Grub image itself. This allows to set the root
|
|
device and other configuration parameters, but however menu
|
|
entries cannot be described in this embedded configuration.
|
|
|
|
endif # BR2_TARGET_GRUB2
|