OsdEnvironment.c revision 217265
1178476Sjb/*- 2178476Sjb * Copyright (c) 2000,2001 Michael Smith 3178476Sjb * Copyright (c) 2000 BSDi 4178476Sjb * All rights reserved. 5178476Sjb * 6178476Sjb * Redistribution and use in source and binary forms, with or without 7178476Sjb * modification, are permitted provided that the following conditions 8178476Sjb * are met: 9178476Sjb * 1. Redistributions of source code must retain the above copyright 10178476Sjb * notice, this list of conditions and the following disclaimer. 11178476Sjb * 2. Redistributions in binary form must reproduce the above copyright 12178476Sjb * notice, this list of conditions and the following disclaimer in the 13178476Sjb * documentation and/or other materials provided with the distribution. 14178476Sjb * 15178476Sjb * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16178476Sjb * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17178476Sjb * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18178476Sjb * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19178476Sjb * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20178476Sjb * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21178476Sjb * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22178476Sjb * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23178476Sjb * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24178476Sjb * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25178476Sjb * SUCH DAMAGE. 26178476Sjb */ 27178476Sjb 28178476Sjb#include <sys/cdefs.h> 29178476Sjb__FBSDID("$FreeBSD: head/sys/x86/acpica/OsdEnvironment.c 217265 2011-01-11 13:59:06Z jhb $"); 30178476Sjb 31178476Sjb#include <sys/types.h> 32178476Sjb#include <sys/bus.h> 33178476Sjb#include <sys/sysctl.h> 34178476Sjb 35178476Sjb#include <contrib/dev/acpica/include/acpi.h> 36178476Sjb#include <contrib/dev/acpica/include/actables.h> 37178476Sjb 38178476Sjbstatic u_long acpi_root_phys; 39178476Sjb 40178476SjbSYSCTL_ULONG(_machdep, OID_AUTO, acpi_root, CTLFLAG_RD, &acpi_root_phys, 0, 41178476Sjb "The physical address of the RSDP"); 42178476Sjb 43178476SjbACPI_STATUS 44178476SjbAcpiOsInitialize(void) 45178476Sjb{ 46178476Sjb 47178476Sjb return (AE_OK); 48178476Sjb} 49178476Sjb 50178476SjbACPI_STATUS 51AcpiOsTerminate(void) 52{ 53 54 return (AE_OK); 55} 56 57static u_long 58acpi_get_root_from_loader(void) 59{ 60 long acpi_root; 61 62 if (resource_long_value("acpi", 0, "rsdp", &acpi_root) == 0) 63 return (acpi_root); 64 65 return (0); 66} 67 68static u_long 69acpi_get_root_from_memory(void) 70{ 71 ACPI_SIZE acpi_root; 72 73 if (ACPI_SUCCESS(AcpiFindRootPointer(&acpi_root))) 74 return (acpi_root); 75 76 return (0); 77} 78 79ACPI_PHYSICAL_ADDRESS 80AcpiOsGetRootPointer(void) 81{ 82 83 if (acpi_root_phys == 0) { 84 acpi_root_phys = acpi_get_root_from_loader(); 85 if (acpi_root_phys == 0) 86 acpi_root_phys = acpi_get_root_from_memory(); 87 } 88 89 return (acpi_root_phys); 90} 91