410 строки
11 KiB
C
410 строки
11 KiB
C
/*******************************************************************************
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*
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* Module Name: utmisc - common utility procedures
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*
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******************************************************************************/
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/*
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* Copyright (C) 2000 - 2015, Intel Corp.
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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 "accommon.h"
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#include "acnamesp.h"
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#define _COMPONENT ACPI_UTILITIES
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ACPI_MODULE_NAME("utmisc")
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_is_pci_root_bridge
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*
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* PARAMETERS: id - The HID/CID in string format
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*
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* RETURN: TRUE if the Id is a match for a PCI/PCI-Express Root Bridge
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*
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* DESCRIPTION: Determine if the input ID is a PCI Root Bridge ID.
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*
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******************************************************************************/
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u8 acpi_ut_is_pci_root_bridge(char *id)
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{
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/*
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* Check if this is a PCI root bridge.
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* ACPI 3.0+: check for a PCI Express root also.
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*/
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if (!(ACPI_STRCMP(id,
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PCI_ROOT_HID_STRING)) ||
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!(ACPI_STRCMP(id, PCI_EXPRESS_ROOT_HID_STRING))) {
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return (TRUE);
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}
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return (FALSE);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_is_aml_table
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*
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* PARAMETERS: table - An ACPI table
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*
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* RETURN: TRUE if table contains executable AML; FALSE otherwise
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*
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* DESCRIPTION: Check ACPI Signature for a table that contains AML code.
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* Currently, these are DSDT,SSDT,PSDT. All other table types are
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* data tables that do not contain AML code.
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*
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******************************************************************************/
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u8 acpi_ut_is_aml_table(struct acpi_table_header *table)
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{
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/* These are the only tables that contain executable AML */
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if (ACPI_COMPARE_NAME(table->signature, ACPI_SIG_DSDT) ||
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ACPI_COMPARE_NAME(table->signature, ACPI_SIG_PSDT) ||
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ACPI_COMPARE_NAME(table->signature, ACPI_SIG_SSDT)) {
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return (TRUE);
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}
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return (FALSE);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_dword_byte_swap
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*
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* PARAMETERS: value - Value to be converted
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*
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* RETURN: u32 integer with bytes swapped
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*
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* DESCRIPTION: Convert a 32-bit value to big-endian (swap the bytes)
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*
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******************************************************************************/
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u32 acpi_ut_dword_byte_swap(u32 value)
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{
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union {
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u32 value;
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u8 bytes[4];
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} out;
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union {
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u32 value;
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u8 bytes[4];
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} in;
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ACPI_FUNCTION_ENTRY();
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in.value = value;
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out.bytes[0] = in.bytes[3];
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out.bytes[1] = in.bytes[2];
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out.bytes[2] = in.bytes[1];
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out.bytes[3] = in.bytes[0];
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return (out.value);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_set_integer_width
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*
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* PARAMETERS: Revision From DSDT header
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*
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* RETURN: None
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*
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* DESCRIPTION: Set the global integer bit width based upon the revision
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* of the DSDT. For Revision 1 and 0, Integers are 32 bits.
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* For Revision 2 and above, Integers are 64 bits. Yes, this
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* makes a difference.
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*
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******************************************************************************/
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void acpi_ut_set_integer_width(u8 revision)
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{
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if (revision < 2) {
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/* 32-bit case */
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acpi_gbl_integer_bit_width = 32;
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acpi_gbl_integer_nybble_width = 8;
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acpi_gbl_integer_byte_width = 4;
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} else {
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/* 64-bit case (ACPI 2.0+) */
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acpi_gbl_integer_bit_width = 64;
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acpi_gbl_integer_nybble_width = 16;
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acpi_gbl_integer_byte_width = 8;
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_create_update_state_and_push
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*
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* PARAMETERS: object - Object to be added to the new state
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* action - Increment/Decrement
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* state_list - List the state will be added to
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*
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* RETURN: Status
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*
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* DESCRIPTION: Create a new state and push it
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*
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******************************************************************************/
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acpi_status
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acpi_ut_create_update_state_and_push(union acpi_operand_object *object,
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u16 action,
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union acpi_generic_state **state_list)
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{
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union acpi_generic_state *state;
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ACPI_FUNCTION_ENTRY();
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/* Ignore null objects; these are expected */
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if (!object) {
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return (AE_OK);
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}
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state = acpi_ut_create_update_state(object, action);
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if (!state) {
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return (AE_NO_MEMORY);
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}
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acpi_ut_push_generic_state(state_list, state);
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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_ut_walk_package_tree
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*
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* PARAMETERS: source_object - The package to walk
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* target_object - Target object (if package is being copied)
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* walk_callback - Called once for each package element
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* context - Passed to the callback function
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*
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* RETURN: Status
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*
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* DESCRIPTION: Walk through a package
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*
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******************************************************************************/
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acpi_status
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acpi_ut_walk_package_tree(union acpi_operand_object *source_object,
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void *target_object,
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acpi_pkg_callback walk_callback, void *context)
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{
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acpi_status status = AE_OK;
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union acpi_generic_state *state_list = NULL;
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union acpi_generic_state *state;
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u32 this_index;
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union acpi_operand_object *this_source_obj;
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ACPI_FUNCTION_TRACE(ut_walk_package_tree);
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state = acpi_ut_create_pkg_state(source_object, target_object, 0);
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if (!state) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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while (state) {
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/* Get one element of the package */
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this_index = state->pkg.index;
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this_source_obj = (union acpi_operand_object *)
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state->pkg.source_object->package.elements[this_index];
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/*
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* Check for:
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* 1) An uninitialized package element. It is completely
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* legal to declare a package and leave it uninitialized
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* 2) Not an internal object - can be a namespace node instead
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* 3) Any type other than a package. Packages are handled in else
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* case below.
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*/
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if ((!this_source_obj) ||
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(ACPI_GET_DESCRIPTOR_TYPE(this_source_obj) !=
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ACPI_DESC_TYPE_OPERAND)
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|| (this_source_obj->common.type != ACPI_TYPE_PACKAGE)) {
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status =
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walk_callback(ACPI_COPY_TYPE_SIMPLE,
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this_source_obj, state, context);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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state->pkg.index++;
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while (state->pkg.index >=
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state->pkg.source_object->package.count) {
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/*
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* We've handled all of the objects at this level, This means
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* that we have just completed a package. That package may
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* have contained one or more packages itself.
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*
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* Delete this state and pop the previous state (package).
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*/
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acpi_ut_delete_generic_state(state);
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state = acpi_ut_pop_generic_state(&state_list);
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/* Finished when there are no more states */
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if (!state) {
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/*
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* We have handled all of the objects in the top level
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* package just add the length of the package objects
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* and exit
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*/
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return_ACPI_STATUS(AE_OK);
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}
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/*
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* Go back up a level and move the index past the just
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* completed package object.
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*/
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state->pkg.index++;
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}
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} else {
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/* This is a subobject of type package */
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status =
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walk_callback(ACPI_COPY_TYPE_PACKAGE,
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this_source_obj, state, context);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/*
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* Push the current state and create a new one
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* The callback above returned a new target package object.
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*/
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acpi_ut_push_generic_state(&state_list, state);
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state = acpi_ut_create_pkg_state(this_source_obj,
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state->pkg.
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this_target_obj, 0);
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if (!state) {
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/* Free any stacked Update State objects */
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while (state_list) {
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state =
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acpi_ut_pop_generic_state
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(&state_list);
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acpi_ut_delete_generic_state(state);
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}
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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}
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}
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/* We should never get here */
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return_ACPI_STATUS(AE_AML_INTERNAL);
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}
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#ifdef ACPI_DEBUG_OUTPUT
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_display_init_pathname
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*
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* PARAMETERS: type - Object type of the node
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* obj_handle - Handle whose pathname will be displayed
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* path - Additional path string to be appended.
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* (NULL if no extra path)
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*
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* RETURN: acpi_status
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*
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* DESCRIPTION: Display full pathname of an object, DEBUG ONLY
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*
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******************************************************************************/
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void
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acpi_ut_display_init_pathname(u8 type,
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struct acpi_namespace_node *obj_handle,
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char *path)
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{
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acpi_status status;
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struct acpi_buffer buffer;
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ACPI_FUNCTION_ENTRY();
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/* Only print the path if the appropriate debug level is enabled */
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if (!(acpi_dbg_level & ACPI_LV_INIT_NAMES)) {
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return;
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}
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/* Get the full pathname to the node */
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buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER;
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status = acpi_ns_handle_to_pathname(obj_handle, &buffer);
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if (ACPI_FAILURE(status)) {
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return;
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}
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/* Print what we're doing */
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switch (type) {
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case ACPI_TYPE_METHOD:
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acpi_os_printf("Executing ");
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break;
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default:
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acpi_os_printf("Initializing ");
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break;
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}
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/* Print the object type and pathname */
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acpi_os_printf("%-12s %s",
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acpi_ut_get_type_name(type), (char *)buffer.pointer);
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/* Extra path is used to append names like _STA, _INI, etc. */
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if (path) {
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acpi_os_printf(".%s", path);
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}
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acpi_os_printf("\n");
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ACPI_FREE(buffer.pointer);
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}
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#endif
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