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edf0acbeac
Add architecture-specific boot configurators that translate the debian-cd boot shell scripts (boot-amd64, boot-arm64, boot-ppc64el, boot-riscv64, boot-s390x) into Python. The package uses a class hierarchy: - BaseBootConfigurator: abstract base with common functionality - GrubBootConfigurator: shared GRUB config generation - UEFIBootConfigurator: UEFI-specific shim/ESP handling - Architecture classes: AMD64, ARM64, PPC64EL, RISCV64, S390X A factory function make_boot_configurator_for_arch() creates the appropriate configurator for each architecture. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
82 lines
2.5 KiB
Python
82 lines
2.5 KiB
Python
"""ARM 64-bit architecture boot configuration."""
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import pathlib
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from .uefi import UEFIBootConfigurator
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from .base import default_kernel_params
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class ARM64BootConfigurator(UEFIBootConfigurator):
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"""Boot setup for ARM 64-bit architecture."""
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efi_suffix = "aa64"
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grub_target = "arm64"
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arch = "arm64"
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def mkisofs_opts(self) -> list[str | pathlib.Path]:
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"""Return mkisofs options for ARM64."""
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opts: list[str | pathlib.Path] = [
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"-J",
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"-joliet-long",
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"-l",
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"-c",
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"boot/boot.cat",
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]
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# Add common UEFI options
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opts.extend(self.get_uefi_mkisofs_opts())
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# ARM64-specific: partition cylinder alignment
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opts.extend(["-partition_cyl_align", "all"])
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opts.append(self.boot_tree)
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return opts
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def extract_files(self) -> None:
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"""Download and extract bootloader packages for ARM64."""
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with self.logger.logged("extracting ARM64 boot files"):
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self.extract_uefi_files()
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def generate_grub_config(self) -> None:
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"""Generate grub.cfg for ARM64."""
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kernel_params = default_kernel_params(self.project)
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grub_cfg = self.grub_dir.joinpath("grub.cfg")
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# Write common GRUB header
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self.write_grub_header(grub_cfg)
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# ARM64-specific: Snapdragon workarounds
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with grub_cfg.open("a") as f:
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f.write(
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"""set cmdline=
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smbios --type 4 --get-string 5 --set proc_version
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regexp "Snapdragon.*" "$proc_version"
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if [ $? = 0 ]; then
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# Work around Snapdragon X firmware bug. cutmem is not allowed in lockdown mode.
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if [ $lockdown != "y" ]; then
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cutmem 0x8800000000 0x8fffffffff
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fi
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# arm64.nopauth works around 8cx Gen 3 firmware bug
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cmdline="clk_ignore_unused pd_ignore_unused arm64.nopauth"
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fi
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menuentry "Try or Install {self.humanproject}" {{
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\tset gfxpayload=keep
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\tlinux\t/casper/vmlinuz $cmdline {kernel_params} console=tty0
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\tinitrd\t/casper/initrd
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}}
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"""
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)
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# HWE kernel option if available
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self.write_hwe_menu_entry(
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grub_cfg,
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"vmlinuz",
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f"{kernel_params} console=tty0",
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extra_params="$cmdline ",
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)
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# Note: ARM64 HWE also includes $dtb in the original shell script,
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# but it's not actually set anywhere in the grub.cfg, so we omit it here
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# UEFI Entries (ARM64 is UEFI-only, no grub_platform check needed)
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self.write_uefi_menu_entries(grub_cfg)
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