1 /* 2 * Copyright (c) 2015-2017 François Tigeot 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice unmodified, this list of conditions, and the following 10 * disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #ifndef _ASM_CACHEFLUSH_H_ 28 #define _ASM_CACHEFLUSH_H_ 29 30 #include <asm/special_insns.h> 31 32 #include <vm/pmap.h> 33 #include <vm/vm_page.h> 34 35 static inline int set_memory_wc(unsigned long vaddr, int numpages) 36 { 37 pmap_change_attr(vaddr, numpages, PAT_WRITE_COMBINING); 38 return 0; 39 } 40 41 static inline int set_memory_wb(unsigned long vaddr, int numpages) 42 { 43 pmap_change_attr(vaddr, numpages, PAT_WRITE_BACK); 44 return 0; 45 } 46 47 static inline int set_pages_uc(struct vm_page *page, int num_pages) 48 { 49 pmap_change_attr(PHYS_TO_DMAP(VM_PAGE_TO_PHYS(page)), 50 num_pages, PAT_UNCACHED); 51 52 return 0; 53 } 54 55 static inline int set_pages_wb(struct vm_page *page, int num_pages) 56 { 57 pmap_change_attr(PHYS_TO_DMAP(VM_PAGE_TO_PHYS(page)), 58 num_pages, PAT_WRITE_BACK); 59 60 return 0; 61 } 62 63 #endif /* _ASM_CACHEFLUSH_H_ */ 64