centralize credits

801affcd · kaashoek · 97a5bba6 · 801affcd · 801affcd · 801affcd
--- a/README
+++ b/README
@@ -10,3 +10,17 @@ 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)
+    Plan 9 (bootother.S, mp.h, mp.c, ioapic.h, lapic.c)
+    FreeBSD (ioapic.c)
+
+The following people made contributions:
+    Russ Cox (context switching, locking)
+    Cliff Frey (MP)
+    Xiao Yu (MP)
+
+If you spot errors or have suggestions for improvement, please send
+email to Frans Kaashoek and Robert Morris
+({kaashoek,rtm}@csail.mit.edu).  This version is the very first one,
+so don't be surprised if there are errors or the code is unclear.
--- a/asm.h
+++ b/asm.h
 //
 // macros to create x86 segments from assembler
-// from JOS
 //

 #define SEG_NULL						\

--- a/bootasm.S
+++ b/bootasm.S
-#
-# from JOS
-#
-        
 #include "asm.h"
 	
 .set PROT_MODE_CSEG,0x8		# code segment selector

--- a/bootother.S
+++ b/bootother.S
@@ -14,7 +14,6 @@
 * mp.c puts the correct %esp in start-4, and the place to jump
 * to in start-8.
 *	
- * Credit: Cliff Frey and Plan 9
 */

 .set PROT_MODE_CSEG,0x8		# code segment selector

--- a/elf.h
+++ b/elf.h
 //
 // format of an ELF executable file
-// from JOS
 //

 #define ELF_MAGIC 0x464C457FU	/* "\x7FELF" in little endian */

--- a/lapic.c
+++ b/lapic.c
@@ -7,11 +7,6 @@
 #include "mmu.h"
 #include "proc.h"

-
-/* 
- * Credit: Plan 9 sources, Intel MP spec, and Cliff Frey
- */
-
 enum {					/* Local APIC registers */
  LAPIC_ID  = 0x0020,	/* ID */
  LAPIC_VER = 0x0030,	/* Version */

--- a/mmu.h
+++ b/mmu.h
 /*
 * This file contains definitions for the x86 memory management unit (MMU).
- * from JOS.
 */

 // Eflags register

--- a/mp.h
+++ b/mp.h
 /*
- * MultiProcessor Specification Version 1.[14].
+ * See MultiProcessor Specification Version 1.[14].
 *
- * Credit: Plan 9 sources
 */

 struct mp {			/* floating pointer */