1 /*- 2 * Copyright (c) 2000,2001 Michael Smith 3 * Copyright (c) 2000 BSDi 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following 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 AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $FreeBSD: src/sys/i386/acpica/OsdEnvironment.c,v 1.10 2004/05/06 02:18:58 njl Exp $ 28 */ 29 30 /* 31 * Environmental and ACPI Tables (partial) 32 */ 33 34 #include <sys/types.h> 35 #include <sys/linker_set.h> 36 #include <sys/sysctl.h> 37 38 #include "acpi.h" 39 40 static u_long i386_acpi_root; 41 42 SYSCTL_ULONG(_machdep, OID_AUTO, acpi_root, CTLFLAG_RD, &i386_acpi_root, 0, 43 "The physical address of the RSDP"); 44 45 ACPI_STATUS 46 AcpiOsInitialize(void) 47 { 48 return (AE_OK); 49 } 50 51 ACPI_STATUS 52 AcpiOsTerminate(void) 53 { 54 return (AE_OK); 55 } 56 57 ACPI_PHYSICAL_ADDRESS 58 AcpiOsGetRootPointer(void) 59 { 60 ACPI_SIZE ptr; 61 ACPI_STATUS status; 62 63 if (i386_acpi_root == 0) { 64 /* 65 * The loader passes the physical address at which it found the 66 * RSDP in a hint. We could recover this rather than searching 67 * manually here. 68 */ 69 status = AcpiFindRootPointer(&ptr); 70 if (ACPI_SUCCESS(status)) 71 i386_acpi_root = ptr; 72 } 73 74 return (i386_acpi_root); 75 } 76