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| -rw-r--r-- | README | 22 | ||||
| -rw-r--r-- | kalloc.c | 2 |
2 files changed, 11 insertions, 13 deletions
@@ -1,19 +1,17 @@ -xv6 is a re-implementation of Unix Version 6 (v6), which was developed -by Dennis Ritchie and Ken Thompson. xv6 follows the structure and -style of v6, but is implemented for a modern x86-based multiprocessor -using ANSI C. +xv6 is a re-implementation of Dennis Ritchie's and Ken Thompson's Unix +Version 6 (v6). xv6 loosely follows the structure and style of v6, +but is implemented for a modern x86-based multiprocessor using ANSI C. -xv6 is inspired by the following work by Lions about Unix version 6: +xv6 is inspired by John Lions' Commentary on UNIX 6th Edition (Peer +to Peer Communications; ISBN: 1-57398-013-7; 1st edition (June 14, +2000)). See also http://pdos.csail.mit.edu/6.828/2006/v6.html, which +provides pointers to on-line resources for v6. -- Lions' Commentary on UNIX' 6th Edition, John Lions, Peer to Peer -Communications; ISBN: 1-57398-013-7; 1st edition (June 14, 2000). See -also http://pdos.csail.mit.edu/6.828/2006/v6.html, which provides -pointers to on-line resources for v6. - -Code was used from the following sources: - JOS (asm.h, elf.h, mmu.h, bootasm.S, ide.c, and others) +xv6 borrows code from the following sources: + JOS (asm.h, elf.h, mmu.h, bootasm.S, ide.c, console.c, and others) Plan 9 (bootother.S, mp.h, mp.c, ioapic.h, lapic.c) FreeBSD (ioapic.c) + NetBSD (console.c) The following people made contributions: Russ Cox (context switching, locking) @@ -38,7 +38,7 @@ kinit(void) initlock(&kalloc_lock, "kalloc"); start = (char *) &end; start = (char *) (((uint)start + PAGE) & ~(PAGE-1)); - mem = 256; // XXX + mem = 256; // assume 256 pages of RAM cprintf("mem = %d\n", mem * PAGE); kfree(start, mem * PAGE); } |