1 /* $NetBSD: acpi_slit.c,v 1.3 2010/03/05 14:00:17 jruoho Exp $ */ 2 3 /* 4 * Copyright (c) 2009 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Christoph Egger. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: acpi_slit.c,v 1.3 2010/03/05 14:00:17 jruoho Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 38 #include <dev/acpi/acpivar.h> 39 #include <dev/acpi/acpi_slit.h> 40 41 static ACPI_TABLE_SLIT *slit; 42 43 bool 44 acpislit_exist(void) 45 { 46 ACPI_TABLE_HEADER *table; 47 ACPI_STATUS rv; 48 49 rv = AcpiGetTable(ACPI_SIG_SLIT, 1, (ACPI_TABLE_HEADER **)&table); 50 if (ACPI_FAILURE(rv)) 51 return false; 52 53 /* Check if header is valid */ 54 if (table == NULL) 55 return false; 56 57 if (table->Length == 0xffffffff) 58 return false; 59 60 slit = (ACPI_TABLE_SLIT *)table; 61 62 return true; 63 } 64 65 int 66 acpislit_init(void) 67 { 68 if (!acpislit_exist()) 69 return EEXIST; 70 return 0; 71 } 72 73 void 74 acpislit_dump(void) 75 { 76 uint64_t idx, count; 77 78 count = acpislit_cpus(); 79 80 aprint_debug("SLIT: matrix with %"PRIu64" nodes\n", count); 81 aprint_debug("SLIT: "); 82 for (idx = 0; idx < (count * count); idx++) { 83 aprint_debug("%u ", slit->Entry[idx]); 84 if ((idx % count) == (count - 1)) { 85 aprint_debug("\n"); 86 if (idx < (count * count) - 1) 87 aprint_debug("SLIT: "); 88 } 89 } 90 } 91 92 uint32_t 93 acpislit_cpus(void) 94 { 95 return slit->LocalityCount; 96 } 97 98 uint32_t 99 acpislit_distance(uint32_t cpu1, uint32_t cpu2) 100 { 101 uint64_t idx = cpu1 * slit->LocalityCount + cpu2; 102 return slit->Entry[idx]; 103 } 104