config BR2_TARGET_GRUB2_ARCH_SUPPORTS
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bool
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default y if BR2_i386
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default y if BR2_x86_64
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default y if BR2_arm
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default y if BR2_aarch64
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depends on BR2_USE_MMU
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config BR2_TARGET_GRUB2
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bool "grub2"
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depends on BR2_TARGET_GRUB2_ARCH_SUPPORTS
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depends on BR2_USE_WCHAR
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select BR2_TARGET_GRUB2_I386_PC if \
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!BR2_TARGET_GRUB2_HAS_PTF && \
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(BR2_i386 || BR2_x86_64)
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select BR2_TARGET_GRUB2_ARM_UBOOT if \
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!BR2_TARGET_GRUB2_HAS_PTF && \
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BR2_arm
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select BR2_TARGET_GRUB2_ARM64_EFI if BR2_aarch64
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help
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GNU GRUB is a Multiboot boot loader. It was derived from
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GRUB, the GRand Unified Bootloader, which was originally
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designed and implemented by Erich Stefan Boleyn. GRUB 2 has
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replaced what was formerly known as GRUB (i.e. version
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0.9x), which has, in turn, become GRUB Legacy.
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Amongst others, GRUB2 offers EFI support, which GRUB Legacy
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doesn't provide.
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For additional notes on using Grub 2 with Buildroot, see
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boot/grub2/readme.txt
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http://www.gnu.org/software/grub/
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if BR2_TARGET_GRUB2
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config BR2_TARGET_GRUB2_HAS_LEGACY_BOOT
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bool
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config BR2_TARGET_GRUB2_HAS_EFI_BOOT
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bool
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config BR2_TARGET_GRUB2_HAS_PTF
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bool
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config BR2_TARGET_GRUB2_I386_PC
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bool "i386-pc"
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depends on BR2_i386 || BR2_x86_64
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select BR2_TARGET_GRUB2_HAS_LEGACY_BOOT
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help
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Select this option if the platform you're targetting is a
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x86 or x86-64 legacy BIOS based platform.
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config BR2_TARGET_GRUB2_I386_EFI
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bool "i386-efi"
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depends on BR2_i386 || BR2_x86_64
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select BR2_TARGET_GRUB2_HAS_PTF
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select BR2_TARGET_GRUB2_HAS_EFI_BOOT
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help
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Select this option if the platform you're targetting has a
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32 bits EFI BIOS. Note that some x86-64 platforms use a 32
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bits EFI BIOS, and this option should be used in this case.
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config BR2_TARGET_GRUB2_X86_64_EFI
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bool "x86-64-efi"
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depends on BR2_x86_64
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select BR2_TARGET_GRUB2_HAS_PTF
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select BR2_TARGET_GRUB2_HAS_EFI_BOOT
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help
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Select this option if the platform you're targetting has a
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64 bits EFI BIOS.
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config BR2_TARGET_GRUB2_ARM_UBOOT
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bool "arm-uboot"
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depends on BR2_arm
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select BR2_TARGET_GRUB2_HAS_LEGACY_BOOT
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help
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Select this option if the platform you're targetting is an
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ARM u-boot platform, and you want to boot Grub 2 as an u-boot
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compatible image.
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config BR2_TARGET_GRUB2_ARM_EFI
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bool "arm-efi"
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depends on BR2_arm
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select BR2_TARGET_GRUB2_HAS_PTF
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select BR2_TARGET_GRUB2_HAS_EFI_BOOT
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help
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Select this option if the platform you're targetting is an
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ARM platform and you want to boot Grub 2 as an EFI
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application.
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config BR2_TARGET_GRUB2_ARM64_EFI
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bool "arm64-efi"
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depends on BR2_aarch64
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select BR2_TARGET_GRUB2_HAS_EFI_BOOT
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help
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Select this option if the platform you're targetting is an
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Aarch64 platform and you want to boot Grub 2 as an EFI
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application.
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if BR2_TARGET_GRUB2_HAS_LEGACY_BOOT
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comment "Options for the x86 legacy BIOS or ARM U-Boot support"
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config BR2_TARGET_GRUB2_BOOT_PARTITION
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string "boot partition"
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default "hd0,msdos1"
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help
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Specify the partition where the /boot/grub/grub.cfg file is
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located. Use 'hd0,msdos1' for the first partition of the
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first disk if using a legacy partition table, or 'hd0,gpt1'
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if using GPT partition table.
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config BR2_TARGET_GRUB2_BUILTIN_MODULES_PC
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string "builtin modules"
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default BR2_TARGET_GRUB2_BUILTIN_MODULES if BR2_TARGET_GRUB2_BUILTIN_MODULES != "" # legacy
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default "boot linux ext2 fat squash4 part_msdos part_gpt normal biosdisk" if BR2_TARGET_GRUB2_I386_PC
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default "linux ext2 fat part_msdos normal" if BR2_TARGET_GRUB2_ARM_UBOOT
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config BR2_TARGET_GRUB2_BUILTIN_CONFIG_PC
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string "builtin config"
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default BR2_TARGET_GRUB2_BUILTIN_CONFIG if BR2_TARGET_GRUB2_BUILTIN_CONFIG != "" # legacy
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help
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Path to a Grub 2 configuration file that will be embedded
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into the Grub image itself. This allows to set the root
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device and other configuration parameters, but however menu
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entries cannot be described in this embedded configuration.
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endif # BR2_TARGET_GRUB2_HAS_LEGACY_BOOT
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if BR2_TARGET_GRUB2_HAS_EFI_BOOT
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comment "Options for the EFI BIOS or ARM EFI support"
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config BR2_TARGET_GRUB2_BUILTIN_MODULES_EFI
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string "builtin modules"
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default BR2_TARGET_GRUB2_BUILTIN_MODULES if BR2_TARGET_GRUB2_BUILTIN_MODULES != "" # legacy
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default "boot linux ext2 fat squash4 part_msdos part_gpt normal efi_gop"
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config BR2_TARGET_GRUB2_BUILTIN_CONFIG_EFI
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string "builtin config"
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default BR2_TARGET_GRUB2_BUILTIN_CONFIG if BR2_TARGET_GRUB2_BUILTIN_CONFIG != "" # legacy
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help
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Path to a Grub 2 configuration file that will be embedded
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into the Grub image itself. This allows to set the root
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device and other configuration parameters, but however menu
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entries cannot be described in this embedded configuration.
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endif # BR2_TARGET_GRUB2_HAS_EFI_BOOT
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config BR2_TARGET_GRUB2_INSTALL_TOOLS
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bool "install tools"
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help
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Install support tools to interact with GNU GRUB Multiboot
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boot loader.
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This will also install the Grub 2 loadable modules to the
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target.
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endif # BR2_TARGET_GRUB2
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comment "grub2 needs a toolchain w/ wchar"
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depends on BR2_TARGET_GRUB2_ARCH_SUPPORTS
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depends on !BR2_USE_WCHAR
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