Commit 43cdf5d6 authored by Jiri Slaby's avatar Jiri Slaby Committed by Ingo Molnar
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x86: pgtable, document pde bits 



Some of pde bits weren't documented, add the short description to them.

Signed-off-by: default avatarJiri Slaby <jirislaby@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 7fda20f1

include/asm-x86/pgtable.h

+7 −7
Original line number Diff line number Diff line
@@ -4,13 +4,13 @@ 
#define USER_PTRS_PER_PGD	((TASK_SIZE-1)/PGDIR_SIZE+1)

#define FIRST_USER_ADDRESS	0



#define _PAGE_BIT_PRESENT	0

#define _PAGE_BIT_RW		1

#define _PAGE_BIT_USER		2

#define _PAGE_BIT_PWT		3

#define _PAGE_BIT_PCD		4

#define _PAGE_BIT_ACCESSED	5

#define _PAGE_BIT_DIRTY		6

#define _PAGE_BIT_PRESENT	0	/* is present */

#define _PAGE_BIT_RW		1	/* writeable */

#define _PAGE_BIT_USER		2	/* userspace addressable */

#define _PAGE_BIT_PWT		3	/* page write through */

#define _PAGE_BIT_PCD		4	/* page cache disabled */

#define _PAGE_BIT_ACCESSED	5	/* was accessed (raised by CPU) */

#define _PAGE_BIT_DIRTY		6	/* was written to (raised by CPU) */

#define _PAGE_BIT_FILE		6

#define _PAGE_BIT_PSE		7	/* 4 MB (or 2MB) page */

#define _PAGE_BIT_PAT		7	/* on 4KB pages */