android_kernel_xiaomi_sm8350/drivers/acpi/dispatcher/dsobject.c
Robert Moore 44f6c01242 ACPICA 20050408 from Bob Moore
Fixed three cases in the interpreter where an "index"
argument to an ASL function was still (internally) 32
bits instead of the required 64 bits.  This was the Index
argument to the Index, Mid, and Match operators.

The "strupr" function is now permanently local
(acpi_ut_strupr), since this is not a POSIX-defined
function and not present in most kernel-level C
libraries. References to the C library strupr function
have been removed from the headers.

Completed the deployment of static
functions/prototypes. All prototypes with the static
attribute have been moved from the headers to the owning
C file.

ACPICA 20050329 from Bob Moore

An error is now generated if an attempt is made to create
a Buffer Field of length zero (A CreateField with a length
operand of zero.)

The interpreter now issues a warning whenever executable
code at the module level is detected during ACPI table
load. This will give some idea of the prevalence of this
type of code.

Implemented support for references to named objects (other
than control methods) within package objects.

Enhanced package object output for the debug
object. Package objects are now completely dumped, showing
all elements.

Enhanced miscellaneous object output for the debug
object. Any object can now be written to the debug object
(for example, a device object can be written, and the type
of the object will be displayed.)

The "static" qualifier has been added to all local
functions across the core subsystem.

The number of "long" lines (> 80 chars) within the source
has been significantly reduced, by about 1/3.

Cleaned up all header files to ensure that all CA/iASL
functions are prototyped (even static functions) and the
formatting is consistent.

Two new header files have been added, acopcode.h and
acnames.h.

Removed several obsolete functions that were no longer
used.

Signed-off-by: Len Brown <len.brown@intel.com>
2005-07-12 00:08:52 -04:00

640 lines
17 KiB
C

/******************************************************************************
*
* Module Name: dsobject - Dispatcher object management routines
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2005, R. Byron Moore
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include <acpi/acpi.h>
#include <acpi/acparser.h>
#include <acpi/amlcode.h>
#include <acpi/acdispat.h>
#include <acpi/acnamesp.h>
#include <acpi/acinterp.h>
#define _COMPONENT ACPI_DISPATCHER
ACPI_MODULE_NAME ("dsobject")
static acpi_status
acpi_ds_build_internal_object (
struct acpi_walk_state *walk_state,
union acpi_parse_object *op,
union acpi_operand_object **obj_desc_ptr);
#ifndef ACPI_NO_METHOD_EXECUTION
/*******************************************************************************
*
* FUNCTION: acpi_ds_build_internal_object
*
* PARAMETERS: walk_state - Current walk state
* Op - Parser object to be translated
* obj_desc_ptr - Where the ACPI internal object is returned
*
* RETURN: Status
*
* DESCRIPTION: Translate a parser Op object to the equivalent namespace object
* Simple objects are any objects other than a package object!
*
******************************************************************************/
static acpi_status
acpi_ds_build_internal_object (
struct acpi_walk_state *walk_state,
union acpi_parse_object *op,
union acpi_operand_object **obj_desc_ptr)
{
union acpi_operand_object *obj_desc;
acpi_status status;
ACPI_FUNCTION_TRACE ("ds_build_internal_object");
*obj_desc_ptr = NULL;
if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) {
/*
* This is an named object reference. If this name was
* previously looked up in the namespace, it was stored in this op.
* Otherwise, go ahead and look it up now
*/
if (!op->common.node) {
status = acpi_ns_lookup (walk_state->scope_info,
op->common.value.string,
ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
NULL,
(struct acpi_namespace_node **) &(op->common.node));
if (ACPI_FAILURE (status)) {
ACPI_REPORT_NSERROR (op->common.value.string, status);
return_ACPI_STATUS (status);
}
}
}
/* Create and init the internal ACPI object */
obj_desc = acpi_ut_create_internal_object (
(acpi_ps_get_opcode_info (op->common.aml_opcode))->object_type);
if (!obj_desc) {
return_ACPI_STATUS (AE_NO_MEMORY);
}
status = acpi_ds_init_object_from_op (walk_state, op, op->common.aml_opcode,
&obj_desc);
if (ACPI_FAILURE (status)) {
acpi_ut_remove_reference (obj_desc);
return_ACPI_STATUS (status);
}
*obj_desc_ptr = obj_desc;
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ds_build_internal_buffer_obj
*
* PARAMETERS: walk_state - Current walk state
* Op - Parser object to be translated
* buffer_length - Length of the buffer
* obj_desc_ptr - Where the ACPI internal object is returned
*
* RETURN: Status
*
* DESCRIPTION: Translate a parser Op package object to the equivalent
* namespace object
*
******************************************************************************/
acpi_status
acpi_ds_build_internal_buffer_obj (
struct acpi_walk_state *walk_state,
union acpi_parse_object *op,
u32 buffer_length,
union acpi_operand_object **obj_desc_ptr)
{
union acpi_parse_object *arg;
union acpi_operand_object *obj_desc;
union acpi_parse_object *byte_list;
u32 byte_list_length = 0;
ACPI_FUNCTION_TRACE ("ds_build_internal_buffer_obj");
obj_desc = *obj_desc_ptr;
if (obj_desc) {
/*
* We are evaluating a Named buffer object "Name (xxxx, Buffer)".
* The buffer object already exists (from the NS node)
*/
}
else {
/* Create a new buffer object */
obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_BUFFER);
*obj_desc_ptr = obj_desc;
if (!obj_desc) {
return_ACPI_STATUS (AE_NO_MEMORY);
}
}
/*
* Second arg is the buffer data (optional) byte_list can be either
* individual bytes or a string initializer. In either case, a
* byte_list appears in the AML.
*/
arg = op->common.value.arg; /* skip first arg */
byte_list = arg->named.next;
if (byte_list) {
if (byte_list->common.aml_opcode != AML_INT_BYTELIST_OP) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Expecting bytelist, got AML opcode %X in op %p\n",
byte_list->common.aml_opcode, byte_list));
acpi_ut_remove_reference (obj_desc);
return (AE_TYPE);
}
byte_list_length = (u32) byte_list->common.value.integer;
}
/*
* The buffer length (number of bytes) will be the larger of:
* 1) The specified buffer length and
* 2) The length of the initializer byte list
*/
obj_desc->buffer.length = buffer_length;
if (byte_list_length > buffer_length) {
obj_desc->buffer.length = byte_list_length;
}
/* Allocate the buffer */
if (obj_desc->buffer.length == 0) {
obj_desc->buffer.pointer = NULL;
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"Buffer defined with zero length in AML, creating\n"));
}
else {
obj_desc->buffer.pointer = ACPI_MEM_CALLOCATE (
obj_desc->buffer.length);
if (!obj_desc->buffer.pointer) {
acpi_ut_delete_object_desc (obj_desc);
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Initialize buffer from the byte_list (if present) */
if (byte_list) {
ACPI_MEMCPY (obj_desc->buffer.pointer, byte_list->named.data,
byte_list_length);
}
}
obj_desc->buffer.flags |= AOPOBJ_DATA_VALID;
op->common.node = (struct acpi_namespace_node *) obj_desc;
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ds_build_internal_package_obj
*
* PARAMETERS: walk_state - Current walk state
* Op - Parser object to be translated
* package_length - Number of elements in the package
* obj_desc_ptr - Where the ACPI internal object is returned
*
* RETURN: Status
*
* DESCRIPTION: Translate a parser Op package object to the equivalent
* namespace object
*
******************************************************************************/
acpi_status
acpi_ds_build_internal_package_obj (
struct acpi_walk_state *walk_state,
union acpi_parse_object *op,
u32 package_length,
union acpi_operand_object **obj_desc_ptr)
{
union acpi_parse_object *arg;
union acpi_parse_object *parent;
union acpi_operand_object *obj_desc = NULL;
u32 package_list_length;
acpi_status status = AE_OK;
u32 i;
ACPI_FUNCTION_TRACE ("ds_build_internal_package_obj");
/* Find the parent of a possibly nested package */
parent = op->common.parent;
while ((parent->common.aml_opcode == AML_PACKAGE_OP) ||
(parent->common.aml_opcode == AML_VAR_PACKAGE_OP)) {
parent = parent->common.parent;
}
obj_desc = *obj_desc_ptr;
if (obj_desc) {
/*
* We are evaluating a Named package object "Name (xxxx, Package)".
* Get the existing package object from the NS node
*/
}
else {
obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_PACKAGE);
*obj_desc_ptr = obj_desc;
if (!obj_desc) {
return_ACPI_STATUS (AE_NO_MEMORY);
}
obj_desc->package.node = parent->common.node;
}
obj_desc->package.count = package_length;
/* Count the number of items in the package list */
package_list_length = 0;
arg = op->common.value.arg;
arg = arg->common.next;
while (arg) {
package_list_length++;
arg = arg->common.next;
}
/*
* The package length (number of elements) will be the greater
* of the specified length and the length of the initializer list
*/
if (package_list_length > package_length) {
obj_desc->package.count = package_list_length;
}
/*
* Allocate the pointer array (array of pointers to the
* individual objects). Add an extra pointer slot so
* that the list is always null terminated.
*/
obj_desc->package.elements = ACPI_MEM_CALLOCATE (
((acpi_size) obj_desc->package.count + 1) * sizeof (void *));
if (!obj_desc->package.elements) {
acpi_ut_delete_object_desc (obj_desc);
return_ACPI_STATUS (AE_NO_MEMORY);
}
/*
* Now init the elements of the package
*/
i = 0;
arg = op->common.value.arg;
arg = arg->common.next;
while (arg) {
if (arg->common.aml_opcode == AML_INT_RETURN_VALUE_OP) {
/* Object (package or buffer) is already built */
obj_desc->package.elements[i] =
ACPI_CAST_PTR (union acpi_operand_object, arg->common.node);
}
else {
status = acpi_ds_build_internal_object (walk_state, arg,
&obj_desc->package.elements[i]);
}
i++;
arg = arg->common.next;
}
obj_desc->package.flags |= AOPOBJ_DATA_VALID;
op->common.node = (struct acpi_namespace_node *) obj_desc;
return_ACPI_STATUS (status);
}
/*******************************************************************************
*
* FUNCTION: acpi_ds_create_node
*
* PARAMETERS: walk_state - Current walk state
* Node - NS Node to be initialized
* Op - Parser object to be translated
*
* RETURN: Status
*
* DESCRIPTION: Create the object to be associated with a namespace node
*
******************************************************************************/
acpi_status
acpi_ds_create_node (
struct acpi_walk_state *walk_state,
struct acpi_namespace_node *node,
union acpi_parse_object *op)
{
acpi_status status;
union acpi_operand_object *obj_desc;
ACPI_FUNCTION_TRACE_PTR ("ds_create_node", op);
/*
* Because of the execution pass through the non-control-method
* parts of the table, we can arrive here twice. Only init
* the named object node the first time through
*/
if (acpi_ns_get_attached_object (node)) {
return_ACPI_STATUS (AE_OK);
}
if (!op->common.value.arg) {
/* No arguments, there is nothing to do */
return_ACPI_STATUS (AE_OK);
}
/* Build an internal object for the argument(s) */
status = acpi_ds_build_internal_object (walk_state, op->common.value.arg,
&obj_desc);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Re-type the object according to its argument */
node->type = ACPI_GET_OBJECT_TYPE (obj_desc);
/* Attach obj to node */
status = acpi_ns_attach_object (node, obj_desc, node->type);
/* Remove local reference to the object */
acpi_ut_remove_reference (obj_desc);
return_ACPI_STATUS (status);
}
#endif /* ACPI_NO_METHOD_EXECUTION */
/*******************************************************************************
*
* FUNCTION: acpi_ds_init_object_from_op
*
* PARAMETERS: walk_state - Current walk state
* Op - Parser op used to init the internal object
* Opcode - AML opcode associated with the object
* ret_obj_desc - Namespace object to be initialized
*
* RETURN: Status
*
* DESCRIPTION: Initialize a namespace object from a parser Op and its
* associated arguments. The namespace object is a more compact
* representation of the Op and its arguments.
*
******************************************************************************/
acpi_status
acpi_ds_init_object_from_op (
struct acpi_walk_state *walk_state,
union acpi_parse_object *op,
u16 opcode,
union acpi_operand_object **ret_obj_desc)
{
const struct acpi_opcode_info *op_info;
union acpi_operand_object *obj_desc;
acpi_status status = AE_OK;
ACPI_FUNCTION_TRACE ("ds_init_object_from_op");
obj_desc = *ret_obj_desc;
op_info = acpi_ps_get_opcode_info (opcode);
if (op_info->class == AML_CLASS_UNKNOWN) {
/* Unknown opcode */
return_ACPI_STATUS (AE_TYPE);
}
/* Perform per-object initialization */
switch (ACPI_GET_OBJECT_TYPE (obj_desc)) {
case ACPI_TYPE_BUFFER:
/*
* Defer evaluation of Buffer term_arg operand
*/
obj_desc->buffer.node = (struct acpi_namespace_node *)
walk_state->operands[0];
obj_desc->buffer.aml_start = op->named.data;
obj_desc->buffer.aml_length = op->named.length;
break;
case ACPI_TYPE_PACKAGE:
/*
* Defer evaluation of Package term_arg operand
*/
obj_desc->package.node = (struct acpi_namespace_node *)
walk_state->operands[0];
obj_desc->package.aml_start = op->named.data;
obj_desc->package.aml_length = op->named.length;
break;
case ACPI_TYPE_INTEGER:
switch (op_info->type) {
case AML_TYPE_CONSTANT:
/*
* Resolve AML Constants here - AND ONLY HERE!
* All constants are integers.
* We mark the integer with a flag that indicates that it started
* life as a constant -- so that stores to constants will perform
* as expected (noop). zero_op is used as a placeholder for optional
* target operands.
*/
obj_desc->common.flags = AOPOBJ_AML_CONSTANT;
switch (opcode) {
case AML_ZERO_OP:
obj_desc->integer.value = 0;
break;
case AML_ONE_OP:
obj_desc->integer.value = 1;
break;
case AML_ONES_OP:
obj_desc->integer.value = ACPI_INTEGER_MAX;
/* Truncate value if we are executing from a 32-bit ACPI table */
#ifndef ACPI_NO_METHOD_EXECUTION
acpi_ex_truncate_for32bit_table (obj_desc);
#endif
break;
case AML_REVISION_OP:
obj_desc->integer.value = ACPI_CA_VERSION;
break;
default:
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Unknown constant opcode %X\n", opcode));
status = AE_AML_OPERAND_TYPE;
break;
}
break;
case AML_TYPE_LITERAL:
obj_desc->integer.value = op->common.value.integer;
break;
default:
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown Integer type %X\n",
op_info->type));
status = AE_AML_OPERAND_TYPE;
break;
}
break;
case ACPI_TYPE_STRING:
obj_desc->string.pointer = op->common.value.string;
obj_desc->string.length = (u32) ACPI_STRLEN (op->common.value.string);
/*
* The string is contained in the ACPI table, don't ever try
* to delete it
*/
obj_desc->common.flags |= AOPOBJ_STATIC_POINTER;
break;
case ACPI_TYPE_METHOD:
break;
case ACPI_TYPE_LOCAL_REFERENCE:
switch (op_info->type) {
case AML_TYPE_LOCAL_VARIABLE:
/* Split the opcode into a base opcode + offset */
obj_desc->reference.opcode = AML_LOCAL_OP;
obj_desc->reference.offset = opcode - AML_LOCAL_OP;
#ifndef ACPI_NO_METHOD_EXECUTION
status = acpi_ds_method_data_get_node (AML_LOCAL_OP,
obj_desc->reference.offset,
walk_state,
(struct acpi_namespace_node **) &obj_desc->reference.object);
#endif
break;
case AML_TYPE_METHOD_ARGUMENT:
/* Split the opcode into a base opcode + offset */
obj_desc->reference.opcode = AML_ARG_OP;
obj_desc->reference.offset = opcode - AML_ARG_OP;
#ifndef ACPI_NO_METHOD_EXECUTION
status = acpi_ds_method_data_get_node (AML_ARG_OP,
obj_desc->reference.offset,
walk_state,
(struct acpi_namespace_node **) &obj_desc->reference.object);
#endif
break;
default: /* Other literals, etc.. */
if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) {
/* Node was saved in Op */
obj_desc->reference.node = op->common.node;
}
obj_desc->reference.opcode = opcode;
break;
}
break;
default:
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unimplemented data type: %X\n",
ACPI_GET_OBJECT_TYPE (obj_desc)));
status = AE_AML_OPERAND_TYPE;
break;
}
return_ACPI_STATUS (status);
}