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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2017-06-16 18:24:39 +0300 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2017-07-26 09:25:08 +0300 |
| commit | c67da7c7c5d4c0a45b079b21f6991cb7e753856e (patch) | |
| tree | b2fa23016e3160fa807e1d89b986156e0923a692 /arch/s390/include/asm/page.h | |
| parent | a31a00ba7c161ac3741c4c8a4872f88891b24554 (diff) | |
| download | linux-c67da7c7c5d4c0a45b079b21f6991cb7e753856e.tar.xz | |
s390/mm: introduce defines to reflect the hardware mmu
Add various defines like e.g. _REGION1_SHIFT to reflect the hardware
mmu. We have quite a bit code that does not make use of the Linux
memory management primitives but directly modifies page, segment and
region values.
Most of this is open-coded like e.g. "1UL << 53". In order to clean
this up introduce a couple of new defines. The existing Linux memory
management defines are changed, so the mapping to the hardware
implementation is reflected.
Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/page.h')
| -rw-r--r-- | arch/s390/include/asm/page.h | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/arch/s390/include/asm/page.h b/arch/s390/include/asm/page.h index b463df89f344..c68b21b12182 100644 --- a/arch/s390/include/asm/page.h +++ b/arch/s390/include/asm/page.h @@ -10,10 +10,14 @@ #include <linux/const.h> #include <asm/types.h> +#define _PAGE_SHIFT 12 +#define _PAGE_SIZE (_AC(1, UL) << _PAGE_SHIFT) +#define _PAGE_MASK (~(_PAGE_SIZE - 1)) + /* PAGE_SHIFT determines the page size */ -#define PAGE_SHIFT 12 -#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) -#define PAGE_MASK (~(PAGE_SIZE-1)) +#define PAGE_SHIFT _PAGE_SHIFT +#define PAGE_SIZE _PAGE_SIZE +#define PAGE_MASK _PAGE_MASK #define PAGE_DEFAULT_ACC 0 #define PAGE_DEFAULT_KEY (PAGE_DEFAULT_ACC << 4) |