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e5080a9677
Every architecture that supports FLATMEM memory model defines its own version of pfn_valid() that essentially compares a pfn to max_mapnr. Use mips/powerpc version implemented as static inline as a generic implementation of pfn_valid() and drop its per-architecture definitions. [rppt@kernel.org: fix the generic pfn_valid()] Link: https://lkml.kernel.org/r/Y9lg7R1Yd931C+y5@kernel.org Link: https://lkml.kernel.org/r/20230129124235.209895-5-rppt@kernel.org Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Guo Ren <guoren@kernel.org> [csky] Acked-by: Huacai Chen <chenhuacai@loongson.cn> [LoongArch] Acked-by: Stafford Horne <shorne@gmail.com> [OpenRISC] Acked-by: Michael Ellerman <mpe@ellerman.id.au> [powerpc] Reviewed-by: David Hildenbrand <david@redhat.com> Tested-by: Conor Dooley <conor.dooley@microchip.com> Cc: Brian Cain <bcain@quicinc.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Dinh Nguyen <dinguyen@kernel.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Greg Ungerer <gerg@linux-m68k.org> Cc: Helge Deller <deller@gmx.de> Cc: Huacai Chen <chenhuacai@kernel.org> Cc: Matt Turner <mattst88@gmail.com> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Richard Weinberger <richard@nod.at> Cc: Rich Felker <dalias@libc.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Vineet Gupta <vgupta@kernel.org> Cc: WANG Xuerui <kernel@xen0n.name> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
122 lines
3.1 KiB
C
122 lines
3.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
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* Copyright 2003 PathScale, Inc.
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*/
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#ifndef __UM_PAGE_H
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#define __UM_PAGE_H
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#include <linux/const.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 (~(PAGE_SIZE-1))
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#ifndef __ASSEMBLY__
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struct page;
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#include <linux/pfn.h>
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#include <linux/types.h>
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#include <asm/vm-flags.h>
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/*
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* These are used to make use of C type-checking..
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*/
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#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
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#define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE)
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#define clear_user_page(page, vaddr, pg) clear_page(page)
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#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
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#if defined(CONFIG_3_LEVEL_PGTABLES) && !defined(CONFIG_64BIT)
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typedef struct { unsigned long pte; } pte_t;
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typedef struct { unsigned long pmd; } pmd_t;
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typedef struct { unsigned long pgd; } pgd_t;
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#define pte_val(p) ((p).pte)
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#define pte_get_bits(p, bits) ((p).pte & (bits))
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#define pte_set_bits(p, bits) ((p).pte |= (bits))
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#define pte_clear_bits(p, bits) ((p).pte &= ~(bits))
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#define pte_copy(to, from) ({ (to).pte = (from).pte; })
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#define pte_is_zero(p) (!((p).pte & ~_PAGE_NEWPAGE))
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#define pte_set_val(p, phys, prot) \
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({ (p).pte = (phys) | pgprot_val(prot); })
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#define pmd_val(x) ((x).pmd)
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#define __pmd(x) ((pmd_t) { (x) } )
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typedef unsigned long long phys_t;
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#else
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typedef struct { unsigned long pte; } pte_t;
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typedef struct { unsigned long pgd; } pgd_t;
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#ifdef CONFIG_3_LEVEL_PGTABLES
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typedef struct { unsigned long pmd; } pmd_t;
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#define pmd_val(x) ((x).pmd)
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#define __pmd(x) ((pmd_t) { (x) } )
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#endif
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#define pte_val(x) ((x).pte)
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#define pte_get_bits(p, bits) ((p).pte & (bits))
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#define pte_set_bits(p, bits) ((p).pte |= (bits))
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#define pte_clear_bits(p, bits) ((p).pte &= ~(bits))
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#define pte_copy(to, from) ((to).pte = (from).pte)
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#define pte_is_zero(p) (!((p).pte & ~_PAGE_NEWPAGE))
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#define pte_set_val(p, phys, prot) (p).pte = (phys | pgprot_val(prot))
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typedef unsigned long phys_t;
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#endif
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typedef struct { unsigned long pgprot; } pgprot_t;
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typedef struct page *pgtable_t;
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#define pgd_val(x) ((x).pgd)
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#define pgprot_val(x) ((x).pgprot)
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#define __pte(x) ((pte_t) { (x) } )
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#define __pgd(x) ((pgd_t) { (x) } )
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#define __pgprot(x) ((pgprot_t) { (x) } )
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extern unsigned long uml_physmem;
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#define PAGE_OFFSET (uml_physmem)
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#define KERNELBASE PAGE_OFFSET
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#define __va_space (8*1024*1024)
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#include <mem.h>
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/* Cast to unsigned long before casting to void * to avoid a warning from
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* mmap_kmem about cutting a long long down to a void *. Not sure that
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* casting is the right thing, but 32-bit UML can't have 64-bit virtual
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* addresses
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*/
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#define __pa(virt) uml_to_phys((void *) (unsigned long) (virt))
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#define __va(phys) uml_to_virt((unsigned long) (phys))
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#define phys_to_pfn(p) ((p) >> PAGE_SHIFT)
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#define pfn_to_phys(pfn) PFN_PHYS(pfn)
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#define virt_addr_valid(v) pfn_valid(phys_to_pfn(__pa(v)))
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#include <asm-generic/memory_model.h>
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#include <asm-generic/getorder.h>
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#endif /* __ASSEMBLY__ */
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#ifdef CONFIG_X86_32
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#define __HAVE_ARCH_GATE_AREA 1
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#endif
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#endif /* __UM_PAGE_H */
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