BareMetal

Hardware requirements Source: • AMD/Intel based 64-bit computer • Memory: 4 MB (plus 2 MB for every additional core) • Hard Disk: 32 MB Supported devices Source: • Bus - PCIe, PCI, xHCI • Non-volatile storage - NVMe, AHCI (SATA), ATA, Virtio-Blk • Ethernet - Intel 8259x 10-gigabit, Intel 8254x/8257x Gigabit, Realtek 816x/811x Gigabit, Virtio-Net One task per core Multitasking on BareMetal is unusual for modern operating systems. BareMetal uses an internal work queue that all CPU cores poll. A task added to the work queue will be processed by any available CPU core in the system and will execute until completion, which results in no context switch overhead. == Programming ==

=== API === An API is documented but, in line with its philosophy, the OS does not enforce entry points for system calls (e.g.: no call gates or other safety mechanisms). === C === BareMetal OS has a build script to pull the latest code, make the needed changes, and then compile C code using the Newlib C standard library. === C++ === A mostly-complete C++11 Standard Library was designed and developed for working in ring 0. The main goal of such library is providing, on a library level, an alternative to hardware memory protection used in classical OSes, with help of carefully designed classes. === K === k for BareMetal: a port of k edu from shakti by Jack Andrews. At this stage, it is just a proof of concept and doesn't integrate the BareMetal file system. === Rust === A Rust program demonstration was added to the programs in November 2014, demonstrating the ability to write Rust programs for BareMetal OS. == Networking ==

TCP/IP stack A TCP/IP stack was the #1 feature request. A port of lwIP written in C was announced in October 2014. minIP, a minimalist IP stack in ANSI C able to provide enough functionalities to serve a simple static webpage, is being developed as a proof of concept to learn the fundamentals in preparation for an x86-64 assembly re-write planned for the future. == References ==