OsdEnvironment.c revision 119531
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 28#include <sys/cdefs.h> 29__FBSDID("$FreeBSD: head/sys/amd64/acpica/OsdEnvironment.c 119531 2003-08-28 16:30:31Z njl $"); 30 31/* 32 * 6.1 : Environmental support 33 */ 34#include <sys/types.h> 35#include <sys/linker_set.h> 36#include <sys/sysctl.h> 37 38#include "acpi.h" 39 40u_long amd64_acpi_root; 41 42SYSCTL_ULONG(_machdep, OID_AUTO, acpi_root, CTLFLAG_RD, &amd64_acpi_root, 0, 43 "The physical address of the RSDP"); 44 45ACPI_STATUS 46AcpiOsInitialize(void) 47{ 48 return(0); 49} 50 51ACPI_STATUS 52AcpiOsTerminate(void) 53{ 54 return(0); 55} 56 57ACPI_STATUS 58AcpiOsGetRootPointer(UINT32 Flags, ACPI_POINTER *RsdpPhysicalAddress) 59{ 60 ACPI_POINTER ptr; 61 ACPI_STATUS status; 62 63 if (amd64_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(Flags, &ptr); 70 if (status == AE_OK) 71 amd64_acpi_root = ptr.Pointer.Physical; 72 } else 73 status = AE_OK; 74 75 RsdpPhysicalAddress->PointerType = ACPI_PHYSICAL_POINTER; 76 RsdpPhysicalAddress->Pointer.Physical = amd64_acpi_root; 77 return (status); 78} 79