![Bob Moore](/assets/img/avatar_default.png)
Added the ACPI_PACKED_POINTERS_NOT_SUPPORTED macro to support C compilers that do not allow the initialization of address pointers within packed structures - even though the hardware itself may support misaligned transfers. Some of the debug data structures are packed by default to minimize size. Added an error message for the case where acpi_os_get_thread_id() returns zero. A non-zero value is required by the core ACPICA code to ensure the proper operation of AML mutexes and recursive control methods. The DSDT is now the only ACPI table that determines whether the AML interpreter is in 32-bit or 64-bit mode. Not really a functional change, but the hooks for per-table 32/64 switching have been removed from the code. A clarification to the ACPI specification is forthcoming in ACPI 3.0B. Fixed a possible leak of an Owner ID in the error path of tbinstal.c acpi_tb_init_table_descriptor() and migrated all table OwnerID deletion to a single place in acpi_tb_uninstall_table() to correct possible leaks when using the acpi_tb_delete_tables_by_type() interface (with assistance from Lance Ortiz.) Fixed a problem with Serialized control methods where the semaphore associated with the method could be over-signaled after multiple method invocations. Fixed two issues with the locking of the internal namespace data structure. Both the Unload() operator and acpi_unload_table() interface now lock the namespace during the namespace deletion associated with the table unload (with assistance from Linn Crosetto.) Fixed problem reports (Valery Podrezov) integrated: - Eliminate unnecessary memory allocation for CreateXxxxField http://bugzilla.kernel.org/show_bug.cgi?id=5426 Fixed problem reports (Fiodor Suietov) integrated: - Incomplete cleanup branches in AcpiTbGetTableRsdt (BZ 369) - On Address Space handler deletion, needless deactivation call (BZ 374) - AcpiRemoveAddressSpaceHandler: validate Device handle parameter (BZ 375) - Possible memory leak, Notify sub-objects of Processor, Power, ThermalZone (BZ 376) - AcpiRemoveAddressSpaceHandler: validate Handler parameter (BZ 378) - Minimum Length of RSDT should be validated (BZ 379) - AcpiRemoveNotifyHandler: return AE_NOT_EXIST if Processor Obj has no Handler (BZ (380) - AcpiUnloadTable: return AE_NOT_EXIST if no table of specified type loaded (BZ 381) Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
308 lines
8.6 KiB
C
308 lines
8.6 KiB
C
/******************************************************************************
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*
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* Module Name: tbrsdt - ACPI RSDT table utilities
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2006, R. Byron Moore
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include <acpi/actables.h>
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#define _COMPONENT ACPI_TABLES
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ACPI_MODULE_NAME("tbrsdt")
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_verify_rsdp
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*
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* PARAMETERS: Address - RSDP (Pointer to RSDT)
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*
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* RETURN: Status
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*
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* DESCRIPTION: Load and validate the RSDP (ptr) and RSDT (table)
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*
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******************************************************************************/
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acpi_status acpi_tb_verify_rsdp(struct acpi_pointer *address)
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{
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struct acpi_table_desc table_info;
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acpi_status status;
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struct rsdp_descriptor *rsdp;
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ACPI_FUNCTION_TRACE(tb_verify_rsdp);
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switch (address->pointer_type) {
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case ACPI_LOGICAL_POINTER:
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rsdp = address->pointer.logical;
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break;
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case ACPI_PHYSICAL_POINTER:
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/*
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* Obtain access to the RSDP structure
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*/
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status = acpi_os_map_memory(address->pointer.physical,
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sizeof(struct rsdp_descriptor),
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ACPI_CAST_PTR(void, &rsdp));
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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break;
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default:
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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/* Verify RSDP signature and checksum */
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status = acpi_tb_validate_rsdp(rsdp);
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if (ACPI_FAILURE(status)) {
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goto cleanup;
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}
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/* RSDP is ok. Init the table info */
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table_info.pointer = ACPI_CAST_PTR(struct acpi_table_header, rsdp);
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table_info.length = sizeof(struct rsdp_descriptor);
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if (address->pointer_type == ACPI_PHYSICAL_POINTER) {
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table_info.allocation = ACPI_MEM_MAPPED;
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} else {
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table_info.allocation = ACPI_MEM_NOT_ALLOCATED;
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}
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/* Save the table pointers and allocation info */
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status = acpi_tb_init_table_descriptor(ACPI_TABLE_ID_RSDP, &table_info);
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if (ACPI_FAILURE(status)) {
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goto cleanup;
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}
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/* Save the RSDP in a global for easy access */
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acpi_gbl_RSDP =
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ACPI_CAST_PTR(struct rsdp_descriptor, table_info.pointer);
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return_ACPI_STATUS(status);
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/* Error exit */
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cleanup:
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if (acpi_gbl_table_flags & ACPI_PHYSICAL_POINTER) {
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acpi_os_unmap_memory(rsdp, sizeof(struct rsdp_descriptor));
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}
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_get_rsdt_address
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*
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* PARAMETERS: out_address - Where the address is returned
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*
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* RETURN: None, Address
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*
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* DESCRIPTION: Extract the address of either the RSDT or XSDT, depending on the
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* version of the RSDP and whether the XSDT pointer is valid
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*
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******************************************************************************/
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void acpi_tb_get_rsdt_address(struct acpi_pointer *out_address)
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{
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ACPI_FUNCTION_ENTRY();
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out_address->pointer_type =
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acpi_gbl_table_flags | ACPI_LOGICAL_ADDRESSING;
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/* Use XSDT if it is present */
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if ((acpi_gbl_RSDP->revision >= 2) &&
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acpi_gbl_RSDP->xsdt_physical_address) {
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out_address->pointer.value =
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acpi_gbl_RSDP->xsdt_physical_address;
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acpi_gbl_root_table_type = ACPI_TABLE_TYPE_XSDT;
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} else {
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/* No XSDT, use the RSDT */
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out_address->pointer.value =
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acpi_gbl_RSDP->rsdt_physical_address;
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acpi_gbl_root_table_type = ACPI_TABLE_TYPE_RSDT;
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_validate_rsdt
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*
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* PARAMETERS: table_ptr - Addressable pointer to the RSDT.
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*
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* RETURN: Status
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*
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* DESCRIPTION: Validate signature for the RSDT or XSDT
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*
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******************************************************************************/
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acpi_status acpi_tb_validate_rsdt(struct acpi_table_header *table_ptr)
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{
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char *signature;
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ACPI_FUNCTION_ENTRY();
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/* Validate minimum length */
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if (table_ptr->length < sizeof(struct acpi_table_header)) {
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ACPI_ERROR((AE_INFO,
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"RSDT/XSDT length (%X) is smaller than minimum (%X)",
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table_ptr->length,
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sizeof(struct acpi_table_header)));
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return (AE_INVALID_TABLE_LENGTH);
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}
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/* Search for appropriate signature, RSDT or XSDT */
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if (acpi_gbl_root_table_type == ACPI_TABLE_TYPE_RSDT) {
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signature = RSDT_SIG;
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} else {
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signature = XSDT_SIG;
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}
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if (!ACPI_COMPARE_NAME(table_ptr->signature, signature)) {
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/* Invalid RSDT or XSDT signature */
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ACPI_ERROR((AE_INFO,
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"Invalid signature where RSDP indicates RSDT/XSDT should be located. RSDP:"));
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ACPI_DUMP_BUFFER(acpi_gbl_RSDP, 20);
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ACPI_ERROR((AE_INFO,
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"RSDT/XSDT signature at %X is invalid",
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acpi_gbl_RSDP->rsdt_physical_address));
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if (acpi_gbl_root_table_type == ACPI_TABLE_TYPE_RSDT) {
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ACPI_ERROR((AE_INFO, "Looking for RSDT"));
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} else {
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ACPI_ERROR((AE_INFO, "Looking for XSDT"));
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}
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ACPI_DUMP_BUFFER(ACPI_CAST_PTR(char, table_ptr), 48);
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return (AE_BAD_SIGNATURE);
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}
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_get_table_rsdt
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Load and validate the RSDP (ptr) and RSDT (table)
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*
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******************************************************************************/
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acpi_status acpi_tb_get_table_rsdt(void)
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{
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struct acpi_table_desc table_info;
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acpi_status status;
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struct acpi_pointer address;
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ACPI_FUNCTION_TRACE(tb_get_table_rsdt);
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/* Get the RSDT/XSDT via the RSDP */
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acpi_tb_get_rsdt_address(&address);
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table_info.type = ACPI_TABLE_ID_XSDT;
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status = acpi_tb_get_table(&address, &table_info);
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status,
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"Could not get the RSDT/XSDT"));
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return_ACPI_STATUS(status);
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}
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ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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"RSDP located at %p, points to RSDT physical=%8.8X%8.8X\n",
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acpi_gbl_RSDP,
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ACPI_FORMAT_UINT64(address.pointer.value)));
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/* Check the RSDT or XSDT signature */
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status = acpi_tb_validate_rsdt(table_info.pointer);
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if (ACPI_FAILURE(status)) {
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goto error_cleanup;
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}
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/* Get the number of tables defined in the RSDT or XSDT */
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acpi_gbl_rsdt_table_count = acpi_tb_get_table_count(acpi_gbl_RSDP,
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table_info.pointer);
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/* Convert and/or copy to an XSDT structure */
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status = acpi_tb_convert_to_xsdt(&table_info);
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if (ACPI_FAILURE(status)) {
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goto error_cleanup;
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}
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/* Save the table pointers and allocation info */
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status = acpi_tb_init_table_descriptor(ACPI_TABLE_ID_XSDT, &table_info);
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if (ACPI_FAILURE(status)) {
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goto error_cleanup;
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}
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acpi_gbl_XSDT =
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ACPI_CAST_PTR(struct xsdt_descriptor, table_info.pointer);
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "XSDT located at %p\n", acpi_gbl_XSDT));
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return_ACPI_STATUS(status);
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error_cleanup:
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/* Free table allocated by acpi_tb_get_table */
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acpi_tb_delete_single_table(&table_info);
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return_ACPI_STATUS(status);
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}
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