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/******************************************************************************
*
* Module Name: dsfield - Dispatcher field routines
* $Revision: 46 $
*
*****************************************************************************/
/*
* Copyright (C) 2000, 2001 R. Byron Moore
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "acpi.h"
#include "amlcode.h"
#include "acdispat.h"
#include "acinterp.h"
#include "acnamesp.h"
#include "acparser.h"
#define _COMPONENT ACPI_DISPATCHER
MODULE_NAME ("dsfield")
/*******************************************************************************
*
* FUNCTION: Acpi_ds_create_buffer_field
*
* PARAMETERS: Opcode - The opcode to be executed
* Operands - List of operands for the opcode
* Walk_state - Current state
*
* RETURN: Status
*
* DESCRIPTION: Execute the Create_field operators:
* Create_bit_field_op,
* Create_byte_field_op,
* Create_word_field_op,
* Create_dWord_field_op,
* Create_qWord_field_op,
* Create_field_op (all of which define fields in buffers)
*
******************************************************************************/
acpi_status
acpi_ds_create_buffer_field (
acpi_parse_object *op,
acpi_walk_state *walk_state)
{
acpi_parse_object *arg;
acpi_namespace_node *node;
acpi_status status;
acpi_operand_object *obj_desc;
FUNCTION_TRACE ("Ds_create_buffer_field");
/* Get the Name_string argument */
if (op->opcode == AML_CREATE_FIELD_OP) {
arg = acpi_ps_get_arg (op, 3);
}
else {
/* Create Bit/Byte/Word/Dword field */
arg = acpi_ps_get_arg (op, 2);
}
if (!arg) {
return_ACPI_STATUS (AE_AML_NO_OPERAND);
}
/*
* Enter the Name_string into the namespace
*/
status = acpi_ns_lookup (walk_state->scope_info, arg->value.string,
INTERNAL_TYPE_DEF_ANY, IMODE_LOAD_PASS1,
NS_NO_UPSEARCH | NS_DONT_OPEN_SCOPE,
walk_state, &(node));
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* We could put the returned object (Node) on the object stack for later, but
* for now, we will put it in the "op" object that the parser uses, so we
* can get it again at the end of this scope
*/
op->node = node;
/*
* If there is no object attached to the node, this node was just created and
* we need to create the field object. Otherwise, this was a lookup of an
* existing node and we don't want to create the field object again.
*/
if (node->object) {
return_ACPI_STATUS (AE_OK);
}
/*
* The Field definition is not fully parsed at this time.
* (We must save the address of the AML for the buffer and index operands)
*/
/* Create the buffer field object */
obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_BUFFER_FIELD);
if (!obj_desc) {
status = AE_NO_MEMORY;
goto cleanup;
}
/*
* Allocate a method object for this field unit
*/
obj_desc->buffer_field.extra = acpi_ut_create_internal_object (
INTERNAL_TYPE_EXTRA);
if (!obj_desc->buffer_field.extra) {
status = AE_NO_MEMORY;
goto cleanup;
}
/*
* Remember location in AML stream of the field unit
* opcode and operands -- since the buffer and index
* operands must be evaluated.
*/
obj_desc->buffer_field.extra->extra.aml_start = ((acpi_parse2_object *) op)->data;
obj_desc->buffer_field.extra->extra.aml_length = ((acpi_parse2_object *) op)->length;
obj_desc->buffer_field.node = node;
/* Attach constructed field descriptor to parent node */
status = acpi_ns_attach_object (node, obj_desc, ACPI_TYPE_BUFFER_FIELD);
cleanup:
/* Remove local reference to the object */
acpi_ut_remove_reference (obj_desc);
return_ACPI_STATUS (status);
}
/*******************************************************************************
*
* FUNCTION: Acpi_ds_get_field_names
*
* PARAMETERS: Info - Create_field info structure
* ` Walk_state - Current method state
* Arg - First parser arg for the field name list
*
* RETURN: Status
*
* DESCRIPTION: Process all named fields in a field declaration. Names are
* entered into the namespace.
*
******************************************************************************/
acpi_status
acpi_ds_get_field_names (
ACPI_CREATE_FIELD_INFO *info,
acpi_walk_state *walk_state,
acpi_parse_object *arg)
{
acpi_status status;
FUNCTION_TRACE_U32 ("Ds_get_field_names", info);
/* First field starts at bit zero */
info->field_bit_position = 0;
/* Process all elements in the field list (of parse nodes) */
while (arg) {
/*
* Three types of field elements are handled:
* 1) Offset - specifies a bit offset
* 2) Access_as - changes the access mode
* 3) Name - Enters a new named field into the namespace
*/
switch (arg->opcode) {
case AML_INT_RESERVEDFIELD_OP:
info->field_bit_position += arg->value.size;
break;
case AML_INT_ACCESSFIELD_OP:
/*
* Get a new Access_type and Access_attribute for all
* entries (until end or another Access_as keyword)
*/
info->field_flags = (u8) ((info->field_flags & FIELD_ACCESS_TYPE_MASK) ||
((u8) (arg->value.integer >> 8)));
break;
case AML_INT_NAMEDFIELD_OP:
/* Enter a new field name into the namespace */
status = acpi_ns_lookup (walk_state->scope_info,
(NATIVE_CHAR *) &((acpi_parse2_object *)arg)->name,
info->field_type, IMODE_LOAD_PASS1,
NS_NO_UPSEARCH | NS_DONT_OPEN_SCOPE,
NULL, &info->field_node);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Create and initialize an object for the new Field Node */
info->field_bit_length = arg->value.size;
status = acpi_ex_prep_field_value (info);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Keep track of bit position for the next field */
info->field_bit_position += info->field_bit_length;
break;
default:
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Invalid opcode in field list: %X\n",
arg->opcode));
return_ACPI_STATUS (AE_AML_ERROR);
break;
}
arg = arg->next;
}
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: Acpi_ds_create_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 field in the specified operation region
*
******************************************************************************/
acpi_status
acpi_ds_create_field (
acpi_parse_object *op,
acpi_namespace_node *region_node,
acpi_walk_state *walk_state)
{
acpi_status status = AE_AML_ERROR;
acpi_parse_object *arg;
ACPI_CREATE_FIELD_INFO info;
FUNCTION_TRACE_PTR ("Ds_create_field", op);
/* First arg is the name of the parent Op_region (must already exist) */
arg = op->value.arg;
if (!region_node) {
status = acpi_ns_lookup (walk_state->scope_info, arg->value.name,
ACPI_TYPE_REGION, IMODE_EXECUTE,
NS_SEARCH_PARENT, walk_state, ®ion_node);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
}
/* Second arg is the field flags */
arg = arg->next;
info.field_flags = arg->value.integer8;
/* Each remaining arg is a Named Field */
info.field_type = INTERNAL_TYPE_REGION_FIELD;
info.region_node = region_node;
status = acpi_ds_get_field_names (&info, walk_state, arg->next);
return_ACPI_STATUS (status);
}
/*******************************************************************************
*
* 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 (
acpi_parse_object *op,
acpi_namespace_node *region_node,
acpi_walk_state *walk_state)
{
acpi_status status = AE_AML_ERROR;
acpi_parse_object *arg;
ACPI_CREATE_FIELD_INFO info;
FUNCTION_TRACE_PTR ("Ds_create_bank_field", op);
/* First arg is the name of the parent Op_region (must already exist) */
arg = op->value.arg;
if (!region_node) {
status = acpi_ns_lookup (walk_state->scope_info, arg->value.name,
ACPI_TYPE_REGION, IMODE_EXECUTE,
NS_SEARCH_PARENT, walk_state, ®ion_node);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
}
/* Second arg is the Bank Register (must already exist) */
arg = arg->next;
status = acpi_ns_lookup (walk_state->scope_info, arg->value.string,
INTERNAL_TYPE_BANK_FIELD_DEFN, IMODE_EXECUTE,
NS_SEARCH_PARENT, walk_state, &info.register_node);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Third arg is the Bank_value */
arg = arg->next;
info.bank_value = arg->value.integer32;
/* Fourth arg is the field flags */
arg = arg->next;
info.field_flags = arg->value.integer8;
/* Each remaining arg is a Named Field */
info.field_type = INTERNAL_TYPE_BANK_FIELD;
info.region_node = region_node;
status = acpi_ds_get_field_names (&info, walk_state, arg->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 (
acpi_parse_object *op,
acpi_namespace_node *region_node,
acpi_walk_state *walk_state)
{
acpi_status status;
acpi_parse_object *arg;
ACPI_CREATE_FIELD_INFO info;
FUNCTION_TRACE_PTR ("Ds_create_index_field", op);
/* First arg is the name of the Index register (must already exist) */
arg = op->value.arg;
status = acpi_ns_lookup (walk_state->scope_info, arg->value.string,
ACPI_TYPE_ANY, IMODE_EXECUTE,
NS_SEARCH_PARENT, walk_state, &info.register_node);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Second arg is the data register (must already exist) */
arg = arg->next;
status = acpi_ns_lookup (walk_state->scope_info, arg->value.string,
INTERNAL_TYPE_INDEX_FIELD_DEFN, IMODE_EXECUTE,
NS_SEARCH_PARENT, walk_state, &info.data_register_node);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Next arg is the field flags */
arg = arg->next;
info.field_flags = arg->value.integer8;
/* Each remaining arg is a Named Field */
info.field_type = INTERNAL_TYPE_INDEX_FIELD;
info.region_node = region_node;
status = acpi_ds_get_field_names (&info, walk_state, arg->next);
return_ACPI_STATUS (status);
}
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