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: releng/10.3/sys/ia64/acpica/OsdEnvironment.c 270296 2014-08-21 19:51:07Z emaste $"); 30 31#include <sys/types.h> 32#include <sys/efi.h> 33#include <sys/sysctl.h> 34 35#include <contrib/dev/acpica/include/acpi.h> 36 37static u_long acpi_root_phys; 38 39SYSCTL_ULONG(_machdep, OID_AUTO, acpi_root, CTLFLAG_RD, &acpi_root_phys, 0, 40 "The physical address of the RSDP"); 41 42ACPI_STATUS 43AcpiOsInitialize(void) 44{ 45 46 return (AE_OK); 47} 48 49ACPI_STATUS 50AcpiOsTerminate(void) 51{ 52 53 return (AE_OK); 54} 55 56static u_long 57acpi_get_root_from_efi(void) 58{ 59 static struct uuid acpi_root_uuid = EFI_TABLE_ACPI20; 60 void *acpi_root; 61 62 acpi_root = efi_get_table(&acpi_root_uuid); 63 if (acpi_root != NULL) 64 return (IA64_RR_MASK((uintptr_t)acpi_root)); 65 66 return (0); 67} 68 69ACPI_PHYSICAL_ADDRESS 70AcpiOsGetRootPointer(void) 71{ 72 73 if (acpi_root_phys == 0) 74 acpi_root_phys = acpi_get_root_from_efi(); 75 76 return (acpi_root_phys); 77} 78