ebf854802d
in the VM area structure in the LinuxKPI when doing mmap() and that unsupported bits are masked away. While at it fix some redundant use of parenthesing inside some related macros. Found by: KrishnamRaju ErapaRaju <Krishna2@chelsio.com> MFC after: 1 week Sponsored by: Mellanox Technologies
97 lines
3.3 KiB
C
97 lines
3.3 KiB
C
/*-
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* Copyright (c) 2010 Isilon Systems, Inc.
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* Copyright (c) 2010 iX Systems, Inc.
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* Copyright (c) 2010 Panasas, Inc.
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* Copyright (c) 2013-2016 Mellanox Technologies, Ltd.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _LINUX_PAGE_H_
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#define _LINUX_PAGE_H_
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#include <linux/types.h>
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#include <sys/param.h>
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#include <sys/vmmeter.h>
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#include <machine/atomic.h>
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#include <vm/vm.h>
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#include <vm/vm_page.h>
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#include <vm/pmap.h>
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typedef unsigned long linux_pte_t;
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typedef unsigned long linux_pmd_t;
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typedef unsigned long linux_pgd_t;
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typedef unsigned long pgprot_t;
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#define page vm_page
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#define LINUXKPI_PROT_VALID (1 << 3)
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#define LINUXKPI_CACHE_MODE_SHIFT 4
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CTASSERT((VM_PROT_ALL & -LINUXKPI_PROT_VALID) == 0);
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static inline pgprot_t
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cachemode2protval(vm_memattr_t attr)
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{
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return ((attr << LINUXKPI_CACHE_MODE_SHIFT) | LINUXKPI_PROT_VALID);
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}
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static inline vm_memattr_t
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pgprot2cachemode(pgprot_t prot)
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{
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if (prot & LINUXKPI_PROT_VALID)
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return (prot >> LINUXKPI_CACHE_MODE_SHIFT);
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else
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return (VM_MEMATTR_DEFAULT);
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}
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#define virt_to_page(x) PHYS_TO_VM_PAGE(vtophys(x))
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#define page_to_pfn(pp) (VM_PAGE_TO_PHYS(pp) >> PAGE_SHIFT)
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#define pfn_to_page(pfn) (PHYS_TO_VM_PAGE((pfn) << PAGE_SHIFT))
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#define nth_page(page,n) pfn_to_page(page_to_pfn(page) + (n))
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#define clear_page(page) memset(page, 0, PAGE_SIZE)
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#define pgprot_noncached(prot) \
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(((prot) & VM_PROT_ALL) | cachemode2protval(VM_MEMATTR_UNCACHEABLE))
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#define pgprot_writecombine(prot) \
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(((prot) & VM_PROT_ALL) | cachemode2protval(VM_MEMATTR_WRITE_COMBINING))
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#undef PAGE_MASK
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#define PAGE_MASK (~(PAGE_SIZE-1))
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/*
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* Modifying PAGE_MASK in the above way breaks trunc_page, round_page,
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* and btoc macros. Therefore, redefine them in a way that makes sense
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* so the LinuxKPI consumers don't get totally broken behavior.
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*/
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#undef btoc
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#define btoc(x) (((vm_offset_t)(x) + PAGE_SIZE - 1) >> PAGE_SHIFT)
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#undef round_page
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#define round_page(x) ((((uintptr_t)(x)) + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1))
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#undef trunc_page
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#define trunc_page(x) ((uintptr_t)(x) & ~(PAGE_SIZE - 1))
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#endif /* _LINUX_PAGE_H_ */
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