forked from Minki/linux
c62da0c35d
There are many platforms with exact same value for VM_DATA_DEFAULT_FLAGS This creates a default value for VM_DATA_DEFAULT_FLAGS in line with the existing VM_STACK_DEFAULT_FLAGS. While here, also define some more macros with standard VMA access flag combinations that are used frequently across many platforms. Apart from simplification, this reduces code duplication as well. Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Vlastimil Babka <vbabka@suse.cz> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Richard Henderson <rth@twiddle.net> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Russell King <linux@armlinux.org.uk> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Mark Salter <msalter@redhat.com> Cc: Guo Ren <guoren@kernel.org> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Brian Cain <bcain@codeaurora.org> Cc: Tony Luck <tony.luck@intel.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Burton <paulburton@kernel.org> Cc: Nick Hu <nickhu@andestech.com> Cc: Ley Foon Tan <ley.foon.tan@intel.com> Cc: Jonas Bonn <jonas@southpole.se> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Rich Felker <dalias@libc.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Guan Xuetao <gxt@pku.edu.cn> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Jeff Dike <jdike@addtoit.com> Cc: Chris Zankel <chris@zankel.net> Link: http://lkml.kernel.org/r/1583391014-8170-2-git-send-email-anshuman.khandual@arm.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
169 lines
3.4 KiB
C
169 lines
3.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* arch/arm/include/asm/page.h
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*
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* Copyright (C) 1995-2003 Russell King
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*/
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#ifndef _ASMARM_PAGE_H
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#define _ASMARM_PAGE_H
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/* PAGE_SHIFT determines the page size */
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#define PAGE_SHIFT 12
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#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
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#define PAGE_MASK (~((1 << PAGE_SHIFT) - 1))
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#ifndef __ASSEMBLY__
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#ifndef CONFIG_MMU
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#include <asm/page-nommu.h>
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#else
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#include <asm/glue.h>
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/*
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* User Space Model
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* ================
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*
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* This section selects the correct set of functions for dealing with
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* page-based copying and clearing for user space for the particular
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* processor(s) we're building for.
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*
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* We have the following to choose from:
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* v4wt - ARMv4 with writethrough cache, without minicache
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* v4wb - ARMv4 with writeback cache, without minicache
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* v4_mc - ARMv4 with minicache
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* xscale - Xscale
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* xsc3 - XScalev3
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*/
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#undef _USER
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#undef MULTI_USER
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#ifdef CONFIG_CPU_COPY_V4WT
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# ifdef _USER
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# define MULTI_USER 1
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# else
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# define _USER v4wt
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# endif
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#endif
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#ifdef CONFIG_CPU_COPY_V4WB
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# ifdef _USER
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# define MULTI_USER 1
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# else
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# define _USER v4wb
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# endif
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#endif
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#ifdef CONFIG_CPU_COPY_FEROCEON
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# ifdef _USER
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# define MULTI_USER 1
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# else
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# define _USER feroceon
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# endif
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#endif
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#ifdef CONFIG_CPU_COPY_FA
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# ifdef _USER
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# define MULTI_USER 1
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# else
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# define _USER fa
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# endif
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#endif
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#ifdef CONFIG_CPU_SA1100
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# ifdef _USER
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# define MULTI_USER 1
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# else
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# define _USER v4_mc
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# endif
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#endif
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#ifdef CONFIG_CPU_XSCALE
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# ifdef _USER
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# define MULTI_USER 1
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# else
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# define _USER xscale_mc
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# endif
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#endif
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#ifdef CONFIG_CPU_XSC3
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# ifdef _USER
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# define MULTI_USER 1
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# else
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# define _USER xsc3_mc
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# endif
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#endif
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#ifdef CONFIG_CPU_COPY_V6
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# define MULTI_USER 1
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#endif
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#if !defined(_USER) && !defined(MULTI_USER)
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#error Unknown user operations model
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#endif
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struct page;
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struct vm_area_struct;
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struct cpu_user_fns {
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void (*cpu_clear_user_highpage)(struct page *page, unsigned long vaddr);
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void (*cpu_copy_user_highpage)(struct page *to, struct page *from,
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unsigned long vaddr, struct vm_area_struct *vma);
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};
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#ifdef MULTI_USER
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extern struct cpu_user_fns cpu_user;
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#define __cpu_clear_user_highpage cpu_user.cpu_clear_user_highpage
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#define __cpu_copy_user_highpage cpu_user.cpu_copy_user_highpage
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#else
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#define __cpu_clear_user_highpage __glue(_USER,_clear_user_highpage)
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#define __cpu_copy_user_highpage __glue(_USER,_copy_user_highpage)
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extern void __cpu_clear_user_highpage(struct page *page, unsigned long vaddr);
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extern void __cpu_copy_user_highpage(struct page *to, struct page *from,
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unsigned long vaddr, struct vm_area_struct *vma);
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#endif
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#define clear_user_highpage(page,vaddr) \
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__cpu_clear_user_highpage(page, vaddr)
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#define __HAVE_ARCH_COPY_USER_HIGHPAGE
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#define copy_user_highpage(to,from,vaddr,vma) \
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__cpu_copy_user_highpage(to, from, vaddr, vma)
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#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
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extern void copy_page(void *to, const void *from);
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#ifdef CONFIG_KUSER_HELPERS
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#define __HAVE_ARCH_GATE_AREA 1
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#endif
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#ifdef CONFIG_ARM_LPAE
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#include <asm/pgtable-3level-types.h>
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#else
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#include <asm/pgtable-2level-types.h>
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#endif
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#endif /* CONFIG_MMU */
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typedef struct page *pgtable_t;
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#ifdef CONFIG_HAVE_ARCH_PFN_VALID
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extern int pfn_valid(unsigned long);
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#endif
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#include <asm/memory.h>
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#endif /* !__ASSEMBLY__ */
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#define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_TSK_EXEC
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#include <asm-generic/getorder.h>
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#endif
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