speakersafetyd is a Rust system daemon that implements a software Smart Amp speaker protection model for Apple Silicon Macs running Linux. It reads voltage and current sense (V/ISENSE) data from a TAS2764-class codec via an ALSA capture PCM, simulates voice coil and magnet temperatures using per-machine configurable thermal parameters, and reduces speaker volume through ALSA mixer controls when temperatures approach limits. The daemon is fail-safe by design: the kernel keeps speakers volume-limited until the daemon writes an unlock magic value, and any panic causes the daemon to exit so the kernel can restore the safe state.

This is the Asahi Linux fork of U-Boot, the universal bootloader, primarily targeting Apple Silicon Macs. The codebase is a full-featured bootloader with support for multiple architectures (ARM, RISC-V, x86, MIPS, PowerPC, etc.), a driver model (DM) for hardware abstraction, device tree support, SPL/TPL multi-stage boot, and a rich command-line interface. It includes bundled libraries for networking (lwIP), cryptography (mbedTLS), and compression (zstd, lzma). The Asahi-specific modifications add support for Apple's M1/M2 SoCs, including early boot initialization, memory mapping, and device tree bindings. The repository is actively maintained with recent commits and a responsive issue tracker.