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Diffstat (limited to 'boot/grub2/Config.in')
| -rw-r--r-- | boot/grub2/Config.in | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/boot/grub2/Config.in b/boot/grub2/Config.in new file mode 100644 index 0000000000..e59626a8a8 --- /dev/null +++ b/boot/grub2/Config.in @@ -0,0 +1,120 @@ +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 + +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 + +endif # BR2_TARGET_GRUB2 |
