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