From 2ff4439bb45a05433282d4fa9ca84202147819c7 Mon Sep 17 00:00:00 2001 From: Jeremy Linton Date: Wed, 7 Oct 2015 12:00:19 -0500 Subject: [PATCH] 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 Signed-off-by: Catalin Marinas --- arch/arm64/include/asm/page.h | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) 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) -- 2.39.5