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https://github.com/freebsd/freebsd-src
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40d951bc59
related to the page tables page allocation and mapping. Sponsored by: The FreeBSD Foundation Sponsored by: Advanced Micro Devices (AMD) MFC after: 1 week
63 lines
2.4 KiB
C
63 lines
2.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2013-2015 The FreeBSD Foundation
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*
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* This software was developed by Konstantin Belousov <kib@FreeBSD.org>
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* under sponsorship from the FreeBSD Foundation.
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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, this list of conditions and the following 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 AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef __X86_IOMMU_X86_IOMMU_H
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#define __X86_IOMMU_X86_IOMMU_H
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/* Both Intel and AMD are not too crazy to have different sizes. */
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typedef struct iommu_pte {
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uint64_t pte;
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} iommu_pte_t;
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#define IOMMU_PAGE_SIZE PAGE_SIZE
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#define IOMMU_PAGE_MASK (IOMMU_PAGE_SIZE - 1)
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#define IOMMU_PAGE_SHIFT PAGE_SHIFT
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#define IOMMU_NPTEPG (IOMMU_PAGE_SIZE / sizeof(iommu_pte_t))
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#define IOMMU_NPTEPGSHIFT 9
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#define IOMMU_PTEMASK (IOMMU_NPTEPG - 1)
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struct sf_buf;
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struct vm_object;
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struct vm_page *iommu_pgalloc(struct vm_object *obj, vm_pindex_t idx,
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int flags);
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void iommu_pgfree(struct vm_object *obj, vm_pindex_t idx, int flags);
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void *iommu_map_pgtbl(struct vm_object *obj, vm_pindex_t idx, int flags,
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struct sf_buf **sf);
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void iommu_unmap_pgtbl(struct sf_buf *sf);
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extern iommu_haddr_t iommu_high;
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extern int iommu_tbl_pagecnt;
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SYSCTL_DECL(_hw_iommu);
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SYSCTL_DECL(_hw_iommu_dmar);
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#endif
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