0,0 → 1,31 |
#ifndef _ASM_X86_AGP_H |
#define _ASM_X86_AGP_H |
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#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. |
*/ |
|
#define map_page_into_agp(page) set_pages_uc(page, 1) |
#define unmap_page_from_agp(page) set_pages_wb(page, 1) |
|
/* |
* 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() |
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/* 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)) |
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#endif /* _ASM_X86_AGP_H */ |