The Terrakernel Project

Made for Terra

Terrakernel is a hybrid x86_64 kernel.

During the development of TK the kernel will always be on version v1.0-rc1. Terra is the operating system I'm planning to use terrakernel for.

TODO

*: WIP

Initial stuff

• Port printf implementation
• Support for some COM1 serial output using port 0x3F8
• End of initial stuff

x86_64 Specific

• Write a GDT
• Write an IDT
• Write a physical memory manager
• Write a virtual memory manager
• Write a heap
• Write a PIT timer (Unused now, use APIC)
• Write an APIC and Multiprocessing support (no MP for now)
• Write an APIC timer
• Switch to fully graphical (flanterm) messages and logs
• Port uACPI
• (Other) Write a VFS and TMPFS and parse a USTAR Initrd archive
• Scheduling and multithreading*
• Switching to userspace
• Write some basic syscalls
• Load x86_64 ELF binaries, static and relocatable (copy from old version of TK) (delayed)
• End of x86_64 stuff (almost) (almost)

Other

• Write a VFS and TMPFS and parse a USTAR Initrd archive
• Write a PCI driver (PCIe as well)
• Write a PS2 keyboard driver and PS2 mouse driver
• Line discipline
• Try to write an XHCI driver for USB device support (optional)
• Write some disk drivers, probably AHCI only for now
• Some filesystem drivers, probably FAT32 and maybe, maybe, maybe EXT3 or EXT4
• End of other

Porting software

• Write or port a LibC
• Port binutils and coreutils
• Port DOOM
• Port a window manager (window server) (probably Xorg)
• Port anything else
• End of porting software
• End of project... or at least this version...

Building the kernel

Check BUILD_INSTRUCTIONS.md

How many LoC?

     258 text files.
     237 unique files.
       5 files ignored.

github.com/AlDanial/cloc v 1.98  T=2.21 s (107.4 files/s, 38514.3 lines/s)
-------------------------------------------------------------------------------
Language                     files          blank        comment           code
-------------------------------------------------------------------------------
C                               55           6540           4142          36391
C/C++ Header                   141           3432          11642          15216
C++                             35           1363             13           5948
Assembly                         5             36              0            232
CMake                            1              0              0             21
-------------------------------------------------------------------------------
SUM:                           237          11371          15797          57808 (56632 old)
-------------------------------------------------------------------------------

Screenshots