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| author | Jiri Slaby <jirislaby@gmail.com> | 2008-03-22 18:50:22 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-04-17 17:41:29 +0200 |
| commit | 43cdf5d6e0a75c1069adc8d126b97b792ff53142 (patch) | |
| tree | f2fed9cf7fc463946e6c268a79c1e1d9754be393 | |
| parent | 7fda20f146d5d217684ffbc37c6b6c5f82c2dffd (diff) | |
| download | linux-43cdf5d6e0a75c1069adc8d126b97b792ff53142.tar.gz linux-43cdf5d6e0a75c1069adc8d126b97b792ff53142.tar.bz2 linux-43cdf5d6e0a75c1069adc8d126b97b792ff53142.zip | |
x86: pgtable, document pde bits
Some of pde bits weren't documented, add the short description to them.
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | include/asm-x86/pgtable.h | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/include/asm-x86/pgtable.h b/include/asm-x86/pgtable.h index 2ce765070464..f1d9f4a03f6f 100644 --- a/include/asm-x86/pgtable.h +++ b/include/asm-x86/pgtable.h @@ -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 */ |