1 /* SPDX-License-Identifier: GPL-2.0 */ 1 2 #ifndef _ASM_X86_AGP_H 3 #define _ASM_X86_AGP_H 4 5 #include <linux/pgtable.h> 6 #include <asm/cacheflush.h> 7 8 /* 9 * Functions to keep the agpgart mappings cohe 10 * GART gives the CPU a physical alias of page 11 * region is mapped uncacheable. Make sure the 12 * mappings with different cacheability attrib 13 * page. This avoids data corruption on some C 14 */ 15 16 #define map_page_into_agp(page) set_pages_uc(p 17 #define unmap_page_from_agp(page) set_pages_wb 18 19 /* 20 * Could use CLFLUSH here if the cpu supports 21 * need to be called for each cacheline of the 22 * not be worth it. Would need a page for it. 23 */ 24 #define flush_agp_cache() wbinvd() 25 26 #endif /* _ASM_X86_AGP_H */ 27
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