| 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 | |