602 lines
17 KiB
C
602 lines
17 KiB
C
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/******************************************************************************
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*
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* Module Name: dsfield - Dispatcher field routines
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2005, 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/amlcode.h>
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#include <acpi/acdispat.h>
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#include <acpi/acinterp.h>
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#include <acpi/acnamesp.h>
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#include <acpi/acparser.h>
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#define _COMPONENT ACPI_DISPATCHER
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ACPI_MODULE_NAME ("dsfield")
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_create_buffer_field
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*
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* PARAMETERS: Opcode - The opcode to be executed
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* Operands - List of operands for the opcode
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* walk_state - Current state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute the create_field operators:
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* create_bit_field_op,
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* create_byte_field_op,
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* create_word_field_op,
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* create_dword_field_op,
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* create_qword_field_op,
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* create_field_op (all of which define fields in buffers)
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*
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******************************************************************************/
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acpi_status
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acpi_ds_create_buffer_field (
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union acpi_parse_object *op,
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struct acpi_walk_state *walk_state)
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{
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union acpi_parse_object *arg;
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struct acpi_namespace_node *node;
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acpi_status status;
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union acpi_operand_object *obj_desc;
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union acpi_operand_object *second_desc = NULL;
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u32 flags;
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ACPI_FUNCTION_TRACE ("ds_create_buffer_field");
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/* Get the name_string argument */
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if (op->common.aml_opcode == AML_CREATE_FIELD_OP) {
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arg = acpi_ps_get_arg (op, 3);
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}
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else {
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/* Create Bit/Byte/Word/Dword field */
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arg = acpi_ps_get_arg (op, 2);
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}
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if (!arg) {
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return_ACPI_STATUS (AE_AML_NO_OPERAND);
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}
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if (walk_state->deferred_node) {
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node = walk_state->deferred_node;
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status = AE_OK;
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}
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else {
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/*
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* During the load phase, we want to enter the name of the field into
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* the namespace. During the execute phase (when we evaluate the size
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* operand), we want to lookup the name
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*/
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if (walk_state->parse_flags & ACPI_PARSE_EXECUTE) {
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flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE;
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}
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else {
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flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | ACPI_NS_ERROR_IF_FOUND;
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}
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/*
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* Enter the name_string into the namespace
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*/
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status = acpi_ns_lookup (walk_state->scope_info, arg->common.value.string,
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ACPI_TYPE_ANY, ACPI_IMODE_LOAD_PASS1,
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flags, walk_state, &(node));
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if (ACPI_FAILURE (status)) {
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ACPI_REPORT_NSERROR (arg->common.value.string, status);
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return_ACPI_STATUS (status);
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}
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}
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/* We could put the returned object (Node) on the object stack for later, but
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* for now, we will put it in the "op" object that the parser uses, so we
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* can get it again at the end of this scope
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*/
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op->common.node = node;
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/*
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* If there is no object attached to the node, this node was just created and
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* we need to create the field object. Otherwise, this was a lookup of an
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* existing node and we don't want to create the field object again.
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*/
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obj_desc = acpi_ns_get_attached_object (node);
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if (obj_desc) {
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return_ACPI_STATUS (AE_OK);
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}
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/*
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* The Field definition is not fully parsed at this time.
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* (We must save the address of the AML for the buffer and index operands)
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*/
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/* Create the buffer field object */
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obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_BUFFER_FIELD);
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if (!obj_desc) {
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status = AE_NO_MEMORY;
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goto cleanup;
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}
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/*
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* Remember location in AML stream of the field unit
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* opcode and operands -- since the buffer and index
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* operands must be evaluated.
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*/
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second_desc = obj_desc->common.next_object;
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second_desc->extra.aml_start = op->named.data;
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second_desc->extra.aml_length = op->named.length;
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obj_desc->buffer_field.node = node;
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/* Attach constructed field descriptors to parent node */
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status = acpi_ns_attach_object (node, obj_desc, ACPI_TYPE_BUFFER_FIELD);
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if (ACPI_FAILURE (status)) {
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goto cleanup;
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}
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cleanup:
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/* Remove local reference to the object */
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acpi_ut_remove_reference (obj_desc);
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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_ds_get_field_names
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*
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* PARAMETERS: Info - create_field info structure
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* ` walk_state - Current method state
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* Arg - First parser arg for the field name list
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*
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* RETURN: Status
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*
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* DESCRIPTION: Process all named fields in a field declaration. Names are
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* entered into the namespace.
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*
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******************************************************************************/
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acpi_status
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acpi_ds_get_field_names (
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struct acpi_create_field_info *info,
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struct acpi_walk_state *walk_state,
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union acpi_parse_object *arg)
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{
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acpi_status status;
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acpi_integer position;
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ACPI_FUNCTION_TRACE_PTR ("ds_get_field_names", info);
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/* First field starts at bit zero */
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info->field_bit_position = 0;
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/* Process all elements in the field list (of parse nodes) */
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while (arg) {
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/*
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* Three types of field elements are handled:
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* 1) Offset - specifies a bit offset
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* 2) access_as - changes the access mode
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* 3) Name - Enters a new named field into the namespace
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*/
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switch (arg->common.aml_opcode) {
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case AML_INT_RESERVEDFIELD_OP:
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position = (acpi_integer) info->field_bit_position
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+ (acpi_integer) arg->common.value.size;
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if (position > ACPI_UINT32_MAX) {
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ACPI_REPORT_ERROR (("Bit offset within field too large (> 0xFFFFFFFF)\n"));
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return_ACPI_STATUS (AE_SUPPORT);
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}
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info->field_bit_position = (u32) position;
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break;
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case AML_INT_ACCESSFIELD_OP:
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/*
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* Get a new access_type and access_attribute -- to be used for all
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* field units that follow, until field end or another access_as keyword.
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*
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* In field_flags, preserve the flag bits other than the ACCESS_TYPE bits
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*/
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info->field_flags = (u8) ((info->field_flags & ~(AML_FIELD_ACCESS_TYPE_MASK)) |
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((u8) ((u32) arg->common.value.integer >> 8)));
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info->attribute = (u8) (arg->common.value.integer);
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break;
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case AML_INT_NAMEDFIELD_OP:
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/* Lookup the name */
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status = acpi_ns_lookup (walk_state->scope_info,
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(char *) &arg->named.name,
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info->field_type, ACPI_IMODE_EXECUTE, ACPI_NS_DONT_OPEN_SCOPE,
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walk_state, &info->field_node);
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if (ACPI_FAILURE (status)) {
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ACPI_REPORT_NSERROR ((char *) &arg->named.name, status);
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if (status != AE_ALREADY_EXISTS) {
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return_ACPI_STATUS (status);
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}
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/* Already exists, ignore error */
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}
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else {
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arg->common.node = info->field_node;
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info->field_bit_length = arg->common.value.size;
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/* Create and initialize an object for the new Field Node */
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status = acpi_ex_prep_field_value (info);
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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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/* Keep track of bit position for the next field */
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position = (acpi_integer) info->field_bit_position
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+ (acpi_integer) arg->common.value.size;
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if (position > ACPI_UINT32_MAX) {
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ACPI_REPORT_ERROR (("Field [%4.4s] bit offset too large (> 0xFFFFFFFF)\n",
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(char *) &info->field_node->name));
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return_ACPI_STATUS (AE_SUPPORT);
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}
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info->field_bit_position += info->field_bit_length;
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break;
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default:
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Invalid opcode in field list: %X\n",
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arg->common.aml_opcode));
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return_ACPI_STATUS (AE_AML_BAD_OPCODE);
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}
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arg = arg->common.next;
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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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*
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* FUNCTION: acpi_ds_create_field
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*
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* PARAMETERS: Op - Op containing the Field definition and args
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* region_node - Object for the containing Operation Region
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* ` walk_state - Current method state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Create a new field in the specified operation region
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*
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******************************************************************************/
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acpi_status
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acpi_ds_create_field (
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union acpi_parse_object *op,
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struct acpi_namespace_node *region_node,
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struct acpi_walk_state *walk_state)
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{
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acpi_status status;
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union acpi_parse_object *arg;
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struct acpi_create_field_info info;
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ACPI_FUNCTION_TRACE_PTR ("ds_create_field", op);
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/* First arg is the name of the parent op_region (must already exist) */
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arg = op->common.value.arg;
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if (!region_node) {
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status = acpi_ns_lookup (walk_state->scope_info, arg->common.value.name,
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ACPI_TYPE_REGION, ACPI_IMODE_EXECUTE,
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ACPI_NS_SEARCH_PARENT, walk_state, ®ion_node);
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if (ACPI_FAILURE (status)) {
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ACPI_REPORT_NSERROR (arg->common.value.name, status);
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return_ACPI_STATUS (status);
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}
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}
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/* Second arg is the field flags */
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arg = arg->common.next;
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info.field_flags = (u8) arg->common.value.integer;
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info.attribute = 0;
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/* Each remaining arg is a Named Field */
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info.field_type = ACPI_TYPE_LOCAL_REGION_FIELD;
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info.region_node = region_node;
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status = acpi_ds_get_field_names (&info, walk_state, arg->common.next);
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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_ds_init_field_objects
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*
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* PARAMETERS: Op - Op containing the Field definition and args
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* ` walk_state - Current method state
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*
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* RETURN: Status
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*
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* DESCRIPTION: For each "Field Unit" name in the argument list that is
|
||
|
|
* part of the field declaration, enter the name into the
|
||
|
|
* namespace.
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
acpi_status
|
||
|
|
acpi_ds_init_field_objects (
|
||
|
|
union acpi_parse_object *op,
|
||
|
|
struct acpi_walk_state *walk_state)
|
||
|
|
{
|
||
|
|
acpi_status status;
|
||
|
|
union acpi_parse_object *arg = NULL;
|
||
|
|
struct acpi_namespace_node *node;
|
||
|
|
u8 type = 0;
|
||
|
|
|
||
|
|
|
||
|
|
ACPI_FUNCTION_TRACE_PTR ("ds_init_field_objects", op);
|
||
|
|
|
||
|
|
|
||
|
|
switch (walk_state->opcode) {
|
||
|
|
case AML_FIELD_OP:
|
||
|
|
arg = acpi_ps_get_arg (op, 2);
|
||
|
|
type = ACPI_TYPE_LOCAL_REGION_FIELD;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case AML_BANK_FIELD_OP:
|
||
|
|
arg = acpi_ps_get_arg (op, 4);
|
||
|
|
type = ACPI_TYPE_LOCAL_BANK_FIELD;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case AML_INDEX_FIELD_OP:
|
||
|
|
arg = acpi_ps_get_arg (op, 3);
|
||
|
|
type = ACPI_TYPE_LOCAL_INDEX_FIELD;
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Walk the list of entries in the field_list
|
||
|
|
*/
|
||
|
|
while (arg) {
|
||
|
|
/* Ignore OFFSET and ACCESSAS terms here */
|
||
|
|
|
||
|
|
if (arg->common.aml_opcode == AML_INT_NAMEDFIELD_OP) {
|
||
|
|
status = acpi_ns_lookup (walk_state->scope_info,
|
||
|
|
(char *) &arg->named.name,
|
||
|
|
type, ACPI_IMODE_LOAD_PASS1,
|
||
|
|
ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | ACPI_NS_ERROR_IF_FOUND,
|
||
|
|
walk_state, &node);
|
||
|
|
if (ACPI_FAILURE (status)) {
|
||
|
|
ACPI_REPORT_NSERROR ((char *) &arg->named.name, status);
|
||
|
|
if (status != AE_ALREADY_EXISTS) {
|
||
|
|
return_ACPI_STATUS (status);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Name already exists, just ignore this error */
|
||
|
|
|
||
|
|
status = AE_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
arg->common.node = node;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Move to next field in the list */
|
||
|
|
|
||
|
|
arg = arg->common.next;
|
||
|
|
}
|
||
|
|
|
||
|
|
return_ACPI_STATUS (AE_OK);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
*
|
||
|
|
* FUNCTION: acpi_ds_create_bank_field
|
||
|
|
*
|
||
|
|
* PARAMETERS: Op - Op containing the Field definition and args
|
||
|
|
* region_node - Object for the containing Operation Region
|
||
|
|
* ` walk_state - Current method state
|
||
|
|
*
|
||
|
|
* RETURN: Status
|
||
|
|
*
|
||
|
|
* DESCRIPTION: Create a new bank field in the specified operation region
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
acpi_status
|
||
|
|
acpi_ds_create_bank_field (
|
||
|
|
union acpi_parse_object *op,
|
||
|
|
struct acpi_namespace_node *region_node,
|
||
|
|
struct acpi_walk_state *walk_state)
|
||
|
|
{
|
||
|
|
acpi_status status;
|
||
|
|
union acpi_parse_object *arg;
|
||
|
|
struct acpi_create_field_info info;
|
||
|
|
|
||
|
|
|
||
|
|
ACPI_FUNCTION_TRACE_PTR ("ds_create_bank_field", op);
|
||
|
|
|
||
|
|
|
||
|
|
/* First arg is the name of the parent op_region (must already exist) */
|
||
|
|
|
||
|
|
arg = op->common.value.arg;
|
||
|
|
if (!region_node) {
|
||
|
|
status = acpi_ns_lookup (walk_state->scope_info, arg->common.value.name,
|
||
|
|
ACPI_TYPE_REGION, ACPI_IMODE_EXECUTE,
|
||
|
|
ACPI_NS_SEARCH_PARENT, walk_state, ®ion_node);
|
||
|
|
if (ACPI_FAILURE (status)) {
|
||
|
|
ACPI_REPORT_NSERROR (arg->common.value.name, status);
|
||
|
|
return_ACPI_STATUS (status);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Second arg is the Bank Register (Field) (must already exist) */
|
||
|
|
|
||
|
|
arg = arg->common.next;
|
||
|
|
status = acpi_ns_lookup (walk_state->scope_info, arg->common.value.string,
|
||
|
|
ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
|
||
|
|
ACPI_NS_SEARCH_PARENT, walk_state, &info.register_node);
|
||
|
|
if (ACPI_FAILURE (status)) {
|
||
|
|
ACPI_REPORT_NSERROR (arg->common.value.string, status);
|
||
|
|
return_ACPI_STATUS (status);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Third arg is the bank_value */
|
||
|
|
|
||
|
|
arg = arg->common.next;
|
||
|
|
info.bank_value = (u32) arg->common.value.integer;
|
||
|
|
|
||
|
|
/* Fourth arg is the field flags */
|
||
|
|
|
||
|
|
arg = arg->common.next;
|
||
|
|
info.field_flags = (u8) arg->common.value.integer;
|
||
|
|
|
||
|
|
/* Each remaining arg is a Named Field */
|
||
|
|
|
||
|
|
info.field_type = ACPI_TYPE_LOCAL_BANK_FIELD;
|
||
|
|
info.region_node = region_node;
|
||
|
|
|
||
|
|
status = acpi_ds_get_field_names (&info, walk_state, arg->common.next);
|
||
|
|
|
||
|
|
return_ACPI_STATUS (status);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
*
|
||
|
|
* FUNCTION: acpi_ds_create_index_field
|
||
|
|
*
|
||
|
|
* PARAMETERS: Op - Op containing the Field definition and args
|
||
|
|
* region_node - Object for the containing Operation Region
|
||
|
|
* ` walk_state - Current method state
|
||
|
|
*
|
||
|
|
* RETURN: Status
|
||
|
|
*
|
||
|
|
* DESCRIPTION: Create a new index field in the specified operation region
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
acpi_status
|
||
|
|
acpi_ds_create_index_field (
|
||
|
|
union acpi_parse_object *op,
|
||
|
|
struct acpi_namespace_node *region_node,
|
||
|
|
struct acpi_walk_state *walk_state)
|
||
|
|
{
|
||
|
|
acpi_status status;
|
||
|
|
union acpi_parse_object *arg;
|
||
|
|
struct acpi_create_field_info info;
|
||
|
|
|
||
|
|
|
||
|
|
ACPI_FUNCTION_TRACE_PTR ("ds_create_index_field", op);
|
||
|
|
|
||
|
|
|
||
|
|
/* First arg is the name of the Index register (must already exist) */
|
||
|
|
|
||
|
|
arg = op->common.value.arg;
|
||
|
|
status = acpi_ns_lookup (walk_state->scope_info, arg->common.value.string,
|
||
|
|
ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
|
||
|
|
ACPI_NS_SEARCH_PARENT, walk_state, &info.register_node);
|
||
|
|
if (ACPI_FAILURE (status)) {
|
||
|
|
ACPI_REPORT_NSERROR (arg->common.value.string, status);
|
||
|
|
return_ACPI_STATUS (status);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Second arg is the data register (must already exist) */
|
||
|
|
|
||
|
|
arg = arg->common.next;
|
||
|
|
status = acpi_ns_lookup (walk_state->scope_info, arg->common.value.string,
|
||
|
|
ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
|
||
|
|
ACPI_NS_SEARCH_PARENT, walk_state, &info.data_register_node);
|
||
|
|
if (ACPI_FAILURE (status)) {
|
||
|
|
ACPI_REPORT_NSERROR (arg->common.value.string, status);
|
||
|
|
return_ACPI_STATUS (status);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Next arg is the field flags */
|
||
|
|
|
||
|
|
arg = arg->common.next;
|
||
|
|
info.field_flags = (u8) arg->common.value.integer;
|
||
|
|
|
||
|
|
/* Each remaining arg is a Named Field */
|
||
|
|
|
||
|
|
info.field_type = ACPI_TYPE_LOCAL_INDEX_FIELD;
|
||
|
|
info.region_node = region_node;
|
||
|
|
|
||
|
|
status = acpi_ds_get_field_names (&info, walk_state, arg->common.next);
|
||
|
|
|
||
|
|
return_ACPI_STATUS (status);
|
||
|
|
}
|
||
|
|
|
||
|
|
|