| #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. | |
| */ | |
| #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() | |
| /* 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 /* _ASM_X86_AGP_H */ |