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82 lines
2.5 KiB
82 lines
2.5 KiB
/**
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* \file drm_memory.h
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* Memory management wrappers for DRM
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*
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* \author Rickard E. (Rik) Faith <faith@valinux.com>
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* \author Gareth Hughes <gareth@valinux.com>
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*/
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/*
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* Created: Thu Feb 4 14:00:34 1999 by faith@valinux.com
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*
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* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
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* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <linux/config.h>
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#include <linux/highmem.h>
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#include <linux/vmalloc.h>
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#include "drmP.h"
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/**
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* Cut down version of drm_memory_debug.h, which used to be called
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* drm_memory.h.
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*/
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#if __OS_HAS_AGP
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#include <linux/vmalloc.h>
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#ifdef HAVE_PAGE_AGP
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#include <asm/agp.h>
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#else
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# ifdef __powerpc__
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# define PAGE_AGP __pgprot(_PAGE_KERNEL | _PAGE_NO_CACHE)
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# else
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# define PAGE_AGP PAGE_KERNEL
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# endif
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#endif
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static inline unsigned long drm_follow_page(void *vaddr)
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{
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pgd_t *pgd = pgd_offset_k((unsigned long)vaddr);
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pud_t *pud = pud_offset(pgd, (unsigned long)vaddr);
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pmd_t *pmd = pmd_offset(pud, (unsigned long)vaddr);
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pte_t *ptep = pte_offset_kernel(pmd, (unsigned long)vaddr);
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return pte_pfn(*ptep) << PAGE_SHIFT;
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}
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#else /* __OS_HAS_AGP */
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static inline unsigned long drm_follow_page(void *vaddr)
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{
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return 0;
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}
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#endif
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void *drm_ioremap(unsigned long offset, unsigned long size,
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drm_device_t * dev);
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void drm_ioremapfree(void *pt, unsigned long size,
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drm_device_t * dev);
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