Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932184AbWH3WRx (ORCPT ); Wed, 30 Aug 2006 18:17:53 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932192AbWH3WRw (ORCPT ); Wed, 30 Aug 2006 18:17:52 -0400 Received: from e34.co.us.ibm.com ([32.97.110.152]:29156 "EHLO e34.co.us.ibm.com") by vger.kernel.org with ESMTP id S932183AbWH3WQM (ORCPT ); Wed, 30 Aug 2006 18:16:12 -0400 Subject: [RFC][PATCH 8/9] powerpc generic PAGE_SIZE To: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org, Dave Hansen From: Dave Hansen Date: Wed, 30 Aug 2006 15:16:10 -0700 References: <20060830221604.E7320C0F@localhost.localdomain> In-Reply-To: <20060830221604.E7320C0F@localhost.localdomain> Message-Id: <20060830221610.0A84399E@localhost.localdomain> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4853 Lines: 142 This is the powerpc portion to convert it over to the generic PAGE_SIZE framework. * add powerpc default of 64k pages to mm/Kconfig, when the 64k option is enabled. Defaults to 4k otherwise. Signed-off-by: Dave Hansen --- threadalloc-dave/include/asm-ppc/page.h | 15 +-------------- threadalloc-dave/include/asm-powerpc/page.h | 24 +----------------------- threadalloc-dave/arch/powerpc/Kconfig | 5 ++++- threadalloc-dave/arch/powerpc/boot/page.h | 3 --- threadalloc-dave/mm/Kconfig | 2 +- 5 files changed, 7 insertions(+), 42 deletions(-) diff -puN include/asm-ppc/page.h~powerpc include/asm-ppc/page.h --- threadalloc/include/asm-ppc/page.h~powerpc 2006-08-30 15:14:59.000000000 -0700 +++ threadalloc-dave/include/asm-ppc/page.h 2006-08-30 15:15:05.000000000 -0700 @@ -3,16 +3,7 @@ #include #include - -/* PAGE_SHIFT determines the page size */ -#define PAGE_SHIFT 12 -#define PAGE_SIZE (ASM_CONST(1) << PAGE_SHIFT) - -/* - * Subtle: this is an int (not an unsigned long) and so it - * gets extended to 64 bits the way want (i.e. with 1s). -- paulus - */ -#define PAGE_MASK (~((1 << PAGE_SHIFT) - 1)) +#include #ifdef __KERNEL__ @@ -37,10 +28,6 @@ typedef unsigned long pte_basic_t; #define PTE_FMT "%.8lx" #endif -/* to align the pointer to the (next) page boundary */ -#define PAGE_ALIGN(addr) ALIGN(addr, PAGE_SIZE) - - #undef STRICT_MM_TYPECHECKS #ifdef STRICT_MM_TYPECHECKS diff -puN include/asm-powerpc/page.h~powerpc include/asm-powerpc/page.h --- threadalloc/include/asm-powerpc/page.h~powerpc 2006-08-30 15:14:59.000000000 -0700 +++ threadalloc-dave/include/asm-powerpc/page.h 2006-08-30 15:15:05.000000000 -0700 @@ -12,33 +12,14 @@ #ifdef __KERNEL__ #include +#include #include #include -/* - * On PPC32 page size is 4K. For PPC64 we support either 4K or 64K software - * page size. When using 64K pages however, whether we are really supporting - * 64K pages in HW or not is irrelevant to those definitions. - */ -#ifdef CONFIG_PPC_64K_PAGES -#define PAGE_SHIFT 16 -#else -#define PAGE_SHIFT 12 -#endif - -#define PAGE_SIZE (ASM_CONST(1) << PAGE_SHIFT) - /* We do define AT_SYSINFO_EHDR but don't use the gate mechanism */ #define __HAVE_ARCH_GATE_AREA 1 /* - * Subtle: (1 << PAGE_SHIFT) is an int, not an unsigned long. So if we - * assign PAGE_MASK to a larger type it gets extended the way we want - * (i.e. with 1s in the high bits) - */ -#define PAGE_MASK (~((1 << PAGE_SHIFT) - 1)) - -/* * KERNELBASE is the virtual address of the start of the kernel, it's often * the same as PAGE_OFFSET, but _might not be_. * @@ -90,9 +71,6 @@ #include #endif -/* to align the pointer to the (next) page boundary */ -#define PAGE_ALIGN(addr) ALIGN(addr, PAGE_SIZE) - /* * Don't compare things with KERNELBASE or PAGE_OFFSET to test for * "kernelness", use is_kernel_addr() - it should do what you want. diff -puN arch/powerpc/Kconfig~powerpc arch/powerpc/Kconfig --- threadalloc/arch/powerpc/Kconfig~powerpc 2006-08-30 15:14:55.000000000 -0700 +++ threadalloc-dave/arch/powerpc/Kconfig 2006-08-30 15:15:05.000000000 -0700 @@ -725,8 +725,11 @@ config ARCH_MEMORY_PROBE def_bool y depends on MEMORY_HOTPLUG +config ARCH_GENERIC_PAGE_SIZE + def_bool y + config PPC_64K_PAGES - bool "64k page size" + bool "enable 64k page size" depends on PPC64 help This option changes the kernel logical page size to 64k. On machines diff -puN arch/powerpc/boot/page.h~powerpc arch/powerpc/boot/page.h --- threadalloc/arch/powerpc/boot/page.h~powerpc 2006-08-30 15:14:55.000000000 -0700 +++ threadalloc-dave/arch/powerpc/boot/page.h 2006-08-30 15:15:05.000000000 -0700 @@ -28,7 +28,4 @@ /* align addr on a size boundary - adjust address up if needed */ #define _ALIGN(addr,size) _ALIGN_UP(addr,size) -/* to align the pointer to the (next) page boundary */ -#define PAGE_ALIGN(addr) _ALIGN(addr, PAGE_SIZE) - #endif /* _PPC_BOOT_PAGE_H */ diff -puN mm/Kconfig~powerpc mm/Kconfig --- threadalloc/mm/Kconfig~powerpc 2006-08-30 15:15:04.000000000 -0700 +++ threadalloc-dave/mm/Kconfig 2006-08-30 15:15:05.000000000 -0700 @@ -50,7 +50,7 @@ config PAGE_SHIFT depends on ARCH_GENERIC_PAGE_SIZE default "13" if PAGE_SIZE_8KB default "14" if PAGE_SIZE_16KB - default "16" if PAGE_SIZE_64KB + default "16" if PAGE_SIZE_64KB || PPC_64K_PAGES default "19" if PAGE_SIZE_512KB default "22" if PAGE_SIZE_4MB default "12" _ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/