104 lines
2.8 KiB
C
104 lines
2.8 KiB
C
/* $NetBSD: acpi_slit.c,v 1.3 2010/03/05 14:00:17 jruoho Exp $ */
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/*
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* Copyright (c) 2009 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Christoph Egger.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: acpi_slit.c,v 1.3 2010/03/05 14:00:17 jruoho Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <dev/acpi/acpivar.h>
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#include <dev/acpi/acpi_slit.h>
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static ACPI_TABLE_SLIT *slit;
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bool
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acpislit_exist(void)
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{
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ACPI_TABLE_HEADER *table;
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ACPI_STATUS rv;
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rv = AcpiGetTable(ACPI_SIG_SLIT, 1, (ACPI_TABLE_HEADER **)&table);
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if (ACPI_FAILURE(rv))
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return false;
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/* Check if header is valid */
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if (table == NULL)
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return false;
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if (table->Length == 0xffffffff)
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return false;
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slit = (ACPI_TABLE_SLIT *)table;
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return true;
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}
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int
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acpislit_init(void)
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{
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if (!acpislit_exist())
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return EEXIST;
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return 0;
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}
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void
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acpislit_dump(void)
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{
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uint64_t idx, count;
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count = acpislit_cpus();
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aprint_debug("SLIT: matrix with %"PRIu64" nodes\n", count);
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aprint_debug("SLIT: ");
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for (idx = 0; idx < (count * count); idx++) {
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aprint_debug("%u ", slit->Entry[idx]);
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if ((idx % count) == (count - 1)) {
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aprint_debug("\n");
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if (idx < (count * count) - 1)
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aprint_debug("SLIT: ");
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}
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}
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}
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uint32_t
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acpislit_cpus(void)
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{
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return slit->LocalityCount;
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}
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uint32_t
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acpislit_distance(uint32_t cpu1, uint32_t cpu2)
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{
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uint64_t idx = cpu1 * slit->LocalityCount + cpu2;
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return slit->Entry[idx];
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}
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