From 22a9835c350782a5c3257343713932af3ac92ee0 Mon Sep 17 00:00:00 2001 From: Dave Hansen Date: Mon, 27 Mar 2006 01:16:04 -0800 Subject: [PATCH] unify PFN_* macros Just about every architecture defines some macros to do operations on pfns. They're all virtually identical. This patch consolidates all of them. One minor glitch is that at least i386 uses them in a very skeletal header file. To keep away from #include dependency hell, I stuck the new definitions in a new, isolated header. Of all of the implementations, sh64 is the only one that varied by a bit. It used some masks to ensure that any sign-extension got ripped away before the arithmetic is done. This has been posted to that sh64 maintainers and the development list. Compiles on x86, x86_64, ia64 and ppc64. Signed-off-by: Dave Hansen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-i386/setup.h | 4 +--- include/asm-m32r/setup.h | 4 ---- include/asm-sh64/platform.h | 5 ----- include/linux/pfn.h | 9 +++++++++ 4 files changed, 10 insertions(+), 12 deletions(-) create mode 100644 include/linux/pfn.h (limited to 'include') diff --git a/include/asm-i386/setup.h b/include/asm-i386/setup.h index 826a8ca..ee94145 100644 --- a/include/asm-i386/setup.h +++ b/include/asm-i386/setup.h @@ -6,9 +6,7 @@ #ifndef _i386_SETUP_H #define _i386_SETUP_H -#define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT) -#define PFN_DOWN(x) ((x) >> PAGE_SHIFT) -#define PFN_PHYS(x) ((x) << PAGE_SHIFT) +#include /* * Reserved space for vmalloc and iomap - defined in asm/page.h diff --git a/include/asm-m32r/setup.h b/include/asm-m32r/setup.h index 5f028dc..52f4fa2 100644 --- a/include/asm-m32r/setup.h +++ b/include/asm-m32r/setup.h @@ -24,10 +24,6 @@ #define RAMDISK_PROMPT_FLAG (0x8000) #define RAMDISK_LOAD_FLAG (0x4000) -#define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT) -#define PFN_DOWN(x) ((x) >> PAGE_SHIFT) -#define PFN_PHYS(x) ((x) << PAGE_SHIFT) - extern unsigned long memory_start; extern unsigned long memory_end; diff --git a/include/asm-sh64/platform.h b/include/asm-sh64/platform.h index 7046a90..bd0d9c4 100644 --- a/include/asm-sh64/platform.h +++ b/include/asm-sh64/platform.h @@ -61,9 +61,4 @@ extern int platform_int_priority[NR_INTC_IRQS]; #define code_resource (platform_parms.kram_res_p[STANDARD_KRAM_RESOURCES - 2]) #define data_resource (platform_parms.kram_res_p[STANDARD_KRAM_RESOURCES - 1]) -/* Be prepared to 64-bit sign extensions */ -#define PFN_UP(x) ((((x) + PAGE_SIZE-1) >> PAGE_SHIFT) & 0x000fffff) -#define PFN_DOWN(x) (((x) >> PAGE_SHIFT) & 0x000fffff) -#define PFN_PHYS(x) ((x) << PAGE_SHIFT) - #endif /* __ASM_SH64_PLATFORM_H */ diff --git a/include/linux/pfn.h b/include/linux/pfn.h new file mode 100644 index 0000000..bb01f8b --- /dev/null +++ b/include/linux/pfn.h @@ -0,0 +1,9 @@ +#ifndef _LINUX_PFN_H_ +#define _LINUX_PFN_H_ + +#define PFN_ALIGN(x) (((unsigned long)(x) + (PAGE_SIZE - 1)) & PAGE_MASK) +#define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT) +#define PFN_DOWN(x) ((x) >> PAGE_SHIFT) +#define PFN_PHYS(x) ((x) << PAGE_SHIFT) + +#endif -- cgit v1.1