1 /* 2 * 3 * Copyright(c) 2006-2007 Tungsten Graphics, Inc., Cedar Park, TX., USA 4 * Copyright (c) 2009, Intel Corporation. 5 * All Rights Reserved. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a 8 * copy of this software and associated documentation files(the 9 * "Software"), to deal in the Software without restriction, including 10 * without limitation the rights to use, copy, modify, merge, publish, 11 * distribute, sub license, and/or sell copies of the Software, and to 12 * permit persons to whom the Software is furnished to do so, subject to 13 * the following conditions: 14 * 15 * The above copyright notice and this permission notice(including the 16 * next paragraph) shall be included in all copies or substantial portions 17 * of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 21 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 22 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, 23 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 24 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 25 * USE OR OTHER DEALINGS IN THE SOFTWARE. 26 * 27 */ 28 /* 29 * Authors: Thomas Hellström <thomas-at-tungstengraphics-dot-com> 30 */ 31 32 /* 33 * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved. 34 */ 35 36 #include <sys/x86_archext.h> 37 #include <vm/seg_kmem.h> 38 #include "drmP.h" 39 40 extern void clflush_insn(caddr_t addr); 41 extern void mfence_insn(void); 42 43 static void 44 drm_clflush_page(caddr_t page) 45 { 46 unsigned int i; 47 48 if (page == NULL) 49 return; 50 51 for (i = 0; i < PAGE_SIZE; i += x86_clflush_size) 52 clflush_insn(page + i); 53 mfence_insn(); 54 } 55 56 void 57 drm_clflush_pages(caddr_t *pages, unsigned long num_pages) 58 { 59 60 if (is_x86_feature(x86_featureset, X86FSET_CLFSH)) { 61 unsigned long i; 62 63 for (i = 0; i < num_pages; i++) 64 drm_clflush_page(pages[i]); 65 } 66 } 67