OsdEnvironment.c revision 167814
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/ia64/acpica/OsdEnvironment.c 167814 2007-03-22 18:16:43Z jkim $"); 30 31#include <sys/types.h> 32#include <sys/linker_set.h> 33#include <sys/sysctl.h> 34#include <machine/efi.h> 35 36#include <contrib/dev/acpica/acpi.h> 37 38static struct uuid acpi_root_uuid = EFI_TABLE_ACPI20; 39 40static u_long acpi_root_phys; 41 42SYSCTL_ULONG(_machdep, OID_AUTO, acpi_root, CTLFLAG_RD, &acpi_root_phys, 0, 43 "The physical address of the RSDP"); 44 45ACPI_STATUS 46AcpiOsInitialize(void) 47{ 48 49 return(AE_OK); 50} 51 52ACPI_STATUS 53AcpiOsTerminate(void) 54{ 55 56 return(AE_OK); 57} 58 59ACPI_PHYSICAL_ADDRESS 60AcpiOsGetRootPointer(void) 61{ 62 void *acpi_root; 63 64 if (acpi_root_phys == 0) { 65 acpi_root = efi_get_table(&acpi_root_uuid); 66 if (acpi_root == NULL) 67 return (0); 68 acpi_root_phys = IA64_RR_MASK((u_long)acpi_root); 69 } 70 71 return (acpi_root_phys); 72} 73