Commit 43cdf5d6 authored by Jiri Slaby's avatar Jiri Slaby Committed by Ingo Molnar

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
...@@ -4,13 +4,13 @@ ...@@ -4,13 +4,13 @@
#define USER_PTRS_PER_PGD ((TASK_SIZE-1)/PGDIR_SIZE+1) #define USER_PTRS_PER_PGD ((TASK_SIZE-1)/PGDIR_SIZE+1)
#define FIRST_USER_ADDRESS 0 #define FIRST_USER_ADDRESS 0
#define _PAGE_BIT_PRESENT 0 #define _PAGE_BIT_PRESENT 0 /* is present */
#define _PAGE_BIT_RW 1 #define _PAGE_BIT_RW 1 /* writeable */
#define _PAGE_BIT_USER 2 #define _PAGE_BIT_USER 2 /* userspace addressable */
#define _PAGE_BIT_PWT 3 #define _PAGE_BIT_PWT 3 /* page write through */
#define _PAGE_BIT_PCD 4 #define _PAGE_BIT_PCD 4 /* page cache disabled */
#define _PAGE_BIT_ACCESSED 5 #define _PAGE_BIT_ACCESSED 5 /* was accessed (raised by CPU) */
#define _PAGE_BIT_DIRTY 6 #define _PAGE_BIT_DIRTY 6 /* was written to (raised by CPU) */
#define _PAGE_BIT_FILE 6 #define _PAGE_BIT_FILE 6
#define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page */ #define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page */
#define _PAGE_BIT_PAT 7 /* on 4KB pages */ #define _PAGE_BIT_PAT 7 /* on 4KB pages */
......
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