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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5270 | serge | 1 | #ifndef _ASM_X86_AGP_H |
| 2 | #define _ASM_X86_AGP_H |
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| 3 | |||
| 4 | #include |
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| 5 | #include |
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| 6 | |||
| 7 | /* |
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| 8 | * Functions to keep the agpgart mappings coherent with the MMU. The |
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| 9 | * GART gives the CPU a physical alias of pages in memory. The alias |
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| 10 | * region is mapped uncacheable. Make sure there are no conflicting |
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| 11 | * mappings with different cachability attributes for the same |
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| 12 | * page. This avoids data corruption on some CPUs. |
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| 13 | */ |
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| 14 | |||
| 15 | #define map_page_into_agp(page) set_pages_uc(page, 1) |
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| 16 | #define unmap_page_from_agp(page) set_pages_wb(page, 1) |
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| 17 | |||
| 18 | /* |
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| 19 | * Could use CLFLUSH here if the cpu supports it. But then it would |
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| 20 | * need to be called for each cacheline of the whole page so it may |
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| 21 | * not be worth it. Would need a page for it. |
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| 22 | */ |
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| 23 | #define flush_agp_cache() wbinvd() |
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| 24 | |||
| 25 | /* GATT allocation. Returns/accepts GATT kernel virtual address. */ |
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| 26 | #define alloc_gatt_pages(order) \ |
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| 27 | ((char *)__get_free_pages(GFP_KERNEL, (order))) |
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| 28 | #define free_gatt_pages(table, order) \ |
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| 29 | free_pages((unsigned long)(table), (order)) |
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| 30 | |||
| 31 | #endif /* _ASM_X86_AGP_H */ |