Commit 2ff4439b authored by Jeremy Linton's avatar Jeremy Linton Committed by Catalin Marinas

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: default avatarJeremy Linton <jeremy.linton@arm.com>
Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent 70e238df
......@@ -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)
......
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