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x86: unify include/asm/agp_32/64.h

Browse source 
Same file, except for whitespace, comment formatting and the
usage of wbinvd() instead of asm volatile("wbinvd":::"memory"), which is
the same.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2007-10-15 23:28:19 +02:00 committed by Thomas Gleixner
parent 003a46cfff
commit 17d36707dd
3 changed files with 39 additions and 74 deletions
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43
include/asm-x86/agp.h
View file

@ -1,5 +1,40 @@
#ifdef CONFIG_X86_32
# include "agp_32.h"
#else
# include "agp_64.h"
#ifndef _ASM_X86_AGP_H
#define _ASM_X86_AGP_H
#include <asm/pgtable.h>
#include <asm/cacheflush.h>
/*
* Functions to keep the agpgart mappings coherent with the MMU. The
* GART gives the CPU a physical alias of pages in memory. The alias
* region is mapped uncacheable. Make sure there are no conflicting
* mappings with different cachability attributes for the same
* page. This avoids data corruption on some CPUs.
*/
/*
* Caller's responsibility to call global_flush_tlb() for performance
* reasons
*/
#define map_page_into_agp(page) change_page_attr(page, 1, PAGE_KERNEL_NOCACHE)
#define unmap_page_from_agp(page) change_page_attr(page, 1, PAGE_KERNEL)
#define flush_agp_mappings() global_flush_tlb()
/*
* Could use CLFLUSH here if the cpu supports it. But then it would
* need to be called for each cacheline of the whole page so it may
* not be worth it. Would need a page for it.
*/
#define flush_agp_cache() wbinvd()
/* Convert a physical address to an address suitable for the GART. */
#define phys_to_gart(x) (x)
#define gart_to_phys(x) (x)
/* GATT allocation. Returns/accepts GATT kernel virtual address. */
#define alloc_gatt_pages(order) \
((char *)__get_free_pages(GFP_KERNEL, (order)))
#define free_gatt_pages(table, order) \
free_pages((unsigned long)(table), (order))
#endif

36
include/asm-x86/agp_32.h
View file

@ -1,36 +0,0 @@
#ifndef AGP_H
#define AGP_H 1
#include <asm/pgtable.h>
#include <asm/cacheflush.h>
/*
* Functions to keep the agpgart mappings coherent with the MMU.
* The GART gives the CPU a physical alias of pages in memory. The alias region is
* mapped uncacheable. Make sure there are no conflicting mappings
* with different cachability attributes for the same page. This avoids
* data corruption on some CPUs.
*/
/* Caller's responsibility to call global_flush_tlb() for
* performance reasons */
#define map_page_into_agp(page) change_page_attr(page, 1, PAGE_KERNEL_NOCACHE)
#define unmap_page_from_agp(page) change_page_attr(page, 1, PAGE_KERNEL)
#define flush_agp_mappings() global_flush_tlb()
/* Could use CLFLUSH here if the cpu supports it. But then it would
need to be called for each cacheline of the whole page so it may not be
worth it. Would need a page for it. */
#define flush_agp_cache() wbinvd()
/* Convert a physical address to an address suitable for the GART. */
#define phys_to_gart(x) (x)
#define gart_to_phys(x) (x)
/* GATT allocation. Returns/accepts GATT kernel virtual address. */
#define alloc_gatt_pages(order) \
((char *)__get_free_pages(GFP_KERNEL, (order)))
#define free_gatt_pages(table, order) \
free_pages((unsigned long)(table), (order))
#endif

34
include/asm-x86/agp_64.h
View file

@ -1,34 +0,0 @@
#ifndef AGP_H
#define AGP_H 1
#include <asm/cacheflush.h>
/*
* Functions to keep the agpgart mappings coherent.
* The GART gives the CPU a physical alias of memory. The alias is
* mapped uncacheable. Make sure there are no conflicting mappings
* with different cachability attributes for the same page.
*/
/* Caller's responsibility to call global_flush_tlb() for
* performance reasons */
#define map_page_into_agp(page) change_page_attr(page, 1, PAGE_KERNEL_NOCACHE)
#define unmap_page_from_agp(page) change_page_attr(page, 1, PAGE_KERNEL)
#define flush_agp_mappings() global_flush_tlb()
/* Could use CLFLUSH here if the cpu supports it. But then it would
need to be called for each cacheline of the whole page so it may not be
worth it. Would need a page for it. */
#define flush_agp_cache() asm volatile("wbinvd":::"memory")
/* Convert a physical address to an address suitable for the GART. */
#define phys_to_gart(x) (x)
#define gart_to_phys(x) (x)
/* GATT allocation. Returns/accepts GATT kernel virtual address. */
#define alloc_gatt_pages(order) \
((char *)__get_free_pages(GFP_KERNEL, (order)))
#define free_gatt_pages(table, order) \
free_pages((unsigned long)(table), (order))
#endif