1b52151e0Skaashoekxv6 is a re-implementation of Unix Version 6 (v6), which was developed 2b52151e0Skaashoekby Dennis Ritchie and Ken Thompson. xv6 follows the structure and 3b52151e0Skaashoekstyle of v6, but is implemented for a modern x86-based multiprocessor 4b52151e0Skaashoekusing ANSI C. 5b52151e0Skaashoek 6b52151e0Skaashoekxv6 is inspired by the following work by Lions about Unix version 6: 7b52151e0Skaashoek 8b52151e0Skaashoek- Lions' Commentary on UNIX' 6th Edition, John Lions, Peer to Peer 9b52151e0SkaashoekCommunications; ISBN: 1-57398-013-7; 1st edition (June 14, 2000). See 10b52151e0Skaashoekalso http://pdos.csail.mit.edu/6.828/2006/v6.html, which provides 11b52151e0Skaashoekpointers to on-line resources for v6. 12b52151e0Skaashoek 13*801affcdSkaashoekCode was used from the following sources: 14*801affcdSkaashoek JOS (asm.h, elf.h, mmu.h, bootasm.S, ide.c, and others) 15*801affcdSkaashoek Plan 9 (bootother.S, mp.h, mp.c, ioapic.h, lapic.c) 16*801affcdSkaashoek FreeBSD (ioapic.c) 17*801affcdSkaashoek 18*801affcdSkaashoekThe following people made contributions: 19*801affcdSkaashoek Russ Cox (context switching, locking) 20*801affcdSkaashoek Cliff Frey (MP) 21*801affcdSkaashoek Xiao Yu (MP) 22*801affcdSkaashoek 23*801affcdSkaashoekIf you spot errors or have suggestions for improvement, please send 24*801affcdSkaashoekemail to Frans Kaashoek and Robert Morris 25*801affcdSkaashoek({kaashoek,rtm}@csail.mit.edu). This version is the very first one, 26*801affcdSkaashoekso don't be surprised if there are errors or the code is unclear. 27