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| author | Jeremy Linton <jeremy.linton@arm.com> | 2015-10-07 19:00:19 +0200 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2015-10-08 19:39:03 +0200 |
| commit | 2ff4439bb45a05433282d4fa9ca84202147819c7 (patch) | |
| tree | 966b90ceced9ac47c05282f1ec2b606a3f65a150 /arch/arm64/include/asm/page.h | |
| parent | MAINTAINERS: add myself as arm perf reviewer (diff) | |
| download | linux-2ff4439bb45a05433282d4fa9ca84202147819c7.tar.xz linux-2ff4439bb45a05433282d4fa9ca84202147819c7.zip | |
arm64: Add contiguous page flag shifts and constants
Add the number of pages required to form a contiguous range,
as well as some supporting constants.
Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/page.h')
| -rw-r--r-- | arch/arm64/include/asm/page.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/page.h b/arch/arm64/include/asm/page.h index 7d9c7e4a424b..33892ef0172d 100644 --- a/arch/arm64/include/asm/page.h +++ b/arch/arm64/include/asm/page.h @@ -20,14 +20,20 @@ #define __ASM_PAGE_H /* PAGE_SHIFT determines the page size */ +/* CONT_SHIFT determines the number of pages which can be tracked together */ #ifdef CONFIG_ARM64_64K_PAGES #define PAGE_SHIFT 16 +#define CONT_SHIFT 5 #else #define PAGE_SHIFT 12 +#define CONT_SHIFT 4 #endif -#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) +#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) #define PAGE_MASK (~(PAGE_SIZE-1)) +#define CONT_SIZE (_AC(1, UL) << (CONT_SHIFT + PAGE_SHIFT)) +#define CONT_MASK (~(CONT_SIZE-1)) + /* * The idmap and swapper page tables need some space reserved in the kernel * image. Both require pgd, pud (4 levels only) and pmd tables to (section) |