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linux-IllusionX/drivers/acpi/dispatcher/dswstate.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

1130 lines
30 KiB
C
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/******************************************************************************
*
* Module Name: dswstate - Dispatcher parse tree walk 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/acdispat.h>
#include <acpi/acnamesp.h>
#define _COMPONENT ACPI_DISPATCHER
ACPI_MODULE_NAME ("dswstate")
/* Local prototypes */
#ifdef ACPI_OBSOLETE_FUNCTIONS
acpi_status
acpi_ds_result_insert (
void *object,
u32 index,
struct acpi_walk_state *walk_state);
acpi_status
acpi_ds_obj_stack_delete_all (
struct acpi_walk_state *walk_state);
acpi_status
acpi_ds_obj_stack_pop_object (
union acpi_operand_object **object,
struct acpi_walk_state *walk_state);
void *
acpi_ds_obj_stack_get_value (
u32 index,
struct acpi_walk_state *walk_state);
#endif
#ifdef ACPI_FUTURE_USAGE
/*******************************************************************************
*
* FUNCTION: acpi_ds_result_remove
*
* PARAMETERS: Object - Where to return the popped object
* Index - Where to extract the object
* walk_state - Current Walk state
*
* RETURN: Status
*
* DESCRIPTION: Pop an object off the bottom of this walk's result stack. In
* other words, this is a FIFO.
*
******************************************************************************/
acpi_status
acpi_ds_result_remove (
union acpi_operand_object **object,
u32 index,
struct acpi_walk_state *walk_state)
{
union acpi_generic_state *state;
ACPI_FUNCTION_NAME ("ds_result_remove");
state = walk_state->results;
if (!state) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No result object pushed! State=%p\n",
walk_state));
return (AE_NOT_EXIST);
}
if (index >= ACPI_OBJ_MAX_OPERAND) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Index out of range: %X State=%p Num=%X\n",
index, walk_state, state->results.num_results));
}
/* Check for a valid result object */
if (!state->results.obj_desc [index]) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Null operand! State=%p #Ops=%X, Index=%X\n",
walk_state, state->results.num_results, index));
return (AE_AML_NO_RETURN_VALUE);
}
/* Remove the object */
state->results.num_results--;
*object = state->results.obj_desc [index];
state->results.obj_desc [index] = NULL;
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"Obj=%p [%s] Index=%X State=%p Num=%X\n",
*object, (*object) ? acpi_ut_get_object_type_name (*object) : "NULL",
index, walk_state, state->results.num_results));
return (AE_OK);
}
#endif /* ACPI_FUTURE_USAGE */
/*******************************************************************************
*
* FUNCTION: acpi_ds_result_pop
*
* PARAMETERS: Object - Where to return the popped object
* walk_state - Current Walk state
*
* RETURN: Status
*
* DESCRIPTION: Pop an object off the bottom of this walk's result stack. In
* other words, this is a FIFO.
*
******************************************************************************/
acpi_status
acpi_ds_result_pop (
union acpi_operand_object **object,
struct acpi_walk_state *walk_state)
{
acpi_native_uint index;
union acpi_generic_state *state;
ACPI_FUNCTION_NAME ("ds_result_pop");
state = walk_state->results;
if (!state) {
return (AE_OK);
}
if (!state->results.num_results) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Result stack is empty! State=%p\n",
walk_state));
return (AE_AML_NO_RETURN_VALUE);
}
/* Remove top element */
state->results.num_results--;
for (index = ACPI_OBJ_NUM_OPERANDS; index; index--) {
/* Check for a valid result object */
if (state->results.obj_desc [index -1]) {
*object = state->results.obj_desc [index -1];
state->results.obj_desc [index -1] = NULL;
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"Obj=%p [%s] Index=%X State=%p Num=%X\n",
*object,
(*object) ? acpi_ut_get_object_type_name (*object) : "NULL",
(u32) index -1, walk_state, state->results.num_results));
return (AE_OK);
}
}
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"No result objects! State=%p\n", walk_state));
return (AE_AML_NO_RETURN_VALUE);
}
/*******************************************************************************
*
* FUNCTION: acpi_ds_result_pop_from_bottom
*
* PARAMETERS: Object - Where to return the popped object
* walk_state - Current Walk state
*
* RETURN: Status
*
* DESCRIPTION: Pop an object off the bottom of this walk's result stack. In
* other words, this is a FIFO.
*
******************************************************************************/
acpi_status
acpi_ds_result_pop_from_bottom (
union acpi_operand_object **object,
struct acpi_walk_state *walk_state)
{
acpi_native_uint index;
union acpi_generic_state *state;
ACPI_FUNCTION_NAME ("ds_result_pop_from_bottom");
state = walk_state->results;
if (!state) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Warning: No result object pushed! State=%p\n", walk_state));
return (AE_NOT_EXIST);
}
if (!state->results.num_results) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No result objects! State=%p\n",
walk_state));
return (AE_AML_NO_RETURN_VALUE);
}
/* Remove Bottom element */
*object = state->results.obj_desc [0];
/* Push entire stack down one element */
for (index = 0; index < state->results.num_results; index++) {
state->results.obj_desc [index] = state->results.obj_desc [index + 1];
}
state->results.num_results--;
/* Check for a valid result object */
if (!*object) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Null operand! State=%p #Ops=%X, Index=%X\n",
walk_state, state->results.num_results, (u32) index));
return (AE_AML_NO_RETURN_VALUE);
}
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p [%s], Results=%p State=%p\n",
*object, (*object) ? acpi_ut_get_object_type_name (*object) : "NULL",
state, walk_state));
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ds_result_push
*
* PARAMETERS: Object - Where to return the popped object
* walk_state - Current Walk state
*
* RETURN: Status
*
* DESCRIPTION: Push an object onto the current result stack
*
******************************************************************************/
acpi_status
acpi_ds_result_push (
union acpi_operand_object *object,
struct acpi_walk_state *walk_state)
{
union acpi_generic_state *state;
ACPI_FUNCTION_NAME ("ds_result_push");
state = walk_state->results;
if (!state) {
ACPI_REPORT_ERROR (("No result stack frame during push\n"));
return (AE_AML_INTERNAL);
}
if (state->results.num_results == ACPI_OBJ_NUM_OPERANDS) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Result stack overflow: Obj=%p State=%p Num=%X\n",
object, walk_state, state->results.num_results));
return (AE_STACK_OVERFLOW);
}
if (!object) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Null Object! Obj=%p State=%p Num=%X\n",
object, walk_state, state->results.num_results));
return (AE_BAD_PARAMETER);
}
state->results.obj_desc [state->results.num_results] = object;
state->results.num_results++;
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p [%s] State=%p Num=%X Cur=%X\n",
object, object ? acpi_ut_get_object_type_name ((union acpi_operand_object *) object) : "NULL",
walk_state, state->results.num_results, walk_state->current_result));
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ds_result_stack_push
*
* PARAMETERS: walk_state - Current Walk state
*
* RETURN: Status
*
* DESCRIPTION: Push an object onto the walk_state result stack.
*
******************************************************************************/
acpi_status
acpi_ds_result_stack_push (
struct acpi_walk_state *walk_state)
{
union acpi_generic_state *state;
ACPI_FUNCTION_NAME ("ds_result_stack_push");
state = acpi_ut_create_generic_state ();
if (!state) {
return (AE_NO_MEMORY);
}
state->common.data_type = ACPI_DESC_TYPE_STATE_RESULT;
acpi_ut_push_generic_state (&walk_state->results, state);
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Results=%p State=%p\n",
state, walk_state));
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ds_result_stack_pop
*
* PARAMETERS: walk_state - Current Walk state
*
* RETURN: Status
*
* DESCRIPTION: Pop an object off of the walk_state result stack.
*
******************************************************************************/
acpi_status
acpi_ds_result_stack_pop (
struct acpi_walk_state *walk_state)
{
union acpi_generic_state *state;
ACPI_FUNCTION_NAME ("ds_result_stack_pop");
/* Check for stack underflow */
if (walk_state->results == NULL) {
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Underflow - State=%p\n",
walk_state));
return (AE_AML_NO_OPERAND);
}
state = acpi_ut_pop_generic_state (&walk_state->results);
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"Result=%p remaining_results=%X State=%p\n",
state, state->results.num_results, walk_state));
acpi_ut_delete_generic_state (state);
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ds_obj_stack_push
*
* PARAMETERS: Object - Object to push
* walk_state - Current Walk state
*
* RETURN: Status
*
* DESCRIPTION: Push an object onto this walk's object/operand stack
*
******************************************************************************/
acpi_status
acpi_ds_obj_stack_push (
void *object,
struct acpi_walk_state *walk_state)
{
ACPI_FUNCTION_NAME ("ds_obj_stack_push");
/* Check for stack overflow */
if (walk_state->num_operands >= ACPI_OBJ_NUM_OPERANDS) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"overflow! Obj=%p State=%p #Ops=%X\n",
object, walk_state, walk_state->num_operands));
return (AE_STACK_OVERFLOW);
}
/* Put the object onto the stack */
walk_state->operands [walk_state->num_operands] = object;
walk_state->num_operands++;
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p [%s] State=%p #Ops=%X\n",
object, acpi_ut_get_object_type_name ((union acpi_operand_object *) object),
walk_state, walk_state->num_operands));
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ds_obj_stack_pop
*
* PARAMETERS: pop_count - Number of objects/entries to pop
* walk_state - Current Walk state
*
* RETURN: Status
*
* DESCRIPTION: Pop this walk's object stack. Objects on the stack are NOT
* deleted by this routine.
*
******************************************************************************/
acpi_status
acpi_ds_obj_stack_pop (
u32 pop_count,
struct acpi_walk_state *walk_state)
{
u32 i;
ACPI_FUNCTION_NAME ("ds_obj_stack_pop");
for (i = 0; i < pop_count; i++) {
/* Check for stack underflow */
if (walk_state->num_operands == 0) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Underflow! Count=%X State=%p #Ops=%X\n",
pop_count, walk_state, walk_state->num_operands));
return (AE_STACK_UNDERFLOW);
}
/* Just set the stack entry to null */
walk_state->num_operands--;
walk_state->operands [walk_state->num_operands] = NULL;
}
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Count=%X State=%p #Ops=%X\n",
pop_count, walk_state, walk_state->num_operands));
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ds_obj_stack_pop_and_delete
*
* PARAMETERS: pop_count - Number of objects/entries to pop
* walk_state - Current Walk state
*
* RETURN: Status
*
* DESCRIPTION: Pop this walk's object stack and delete each object that is
* popped off.
*
******************************************************************************/
acpi_status
acpi_ds_obj_stack_pop_and_delete (
u32 pop_count,
struct acpi_walk_state *walk_state)
{
u32 i;
union acpi_operand_object *obj_desc;
ACPI_FUNCTION_NAME ("ds_obj_stack_pop_and_delete");
for (i = 0; i < pop_count; i++) {
/* Check for stack underflow */
if (walk_state->num_operands == 0) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Underflow! Count=%X State=%p #Ops=%X\n",
pop_count, walk_state, walk_state->num_operands));
return (AE_STACK_UNDERFLOW);
}
/* Pop the stack and delete an object if present in this stack entry */
walk_state->num_operands--;
obj_desc = walk_state->operands [walk_state->num_operands];
if (obj_desc) {
acpi_ut_remove_reference (walk_state->operands [walk_state->num_operands]);
walk_state->operands [walk_state->num_operands] = NULL;
}
}
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Count=%X State=%p #Ops=%X\n",
pop_count, walk_state, walk_state->num_operands));
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ds_get_current_walk_state
*
* PARAMETERS: Thread - Get current active state for this Thread
*
* RETURN: Pointer to the current walk state
*
* DESCRIPTION: Get the walk state that is at the head of the list (the "current"
* walk state.)
*
******************************************************************************/
struct acpi_walk_state *
acpi_ds_get_current_walk_state (
struct acpi_thread_state *thread)
{
ACPI_FUNCTION_NAME ("ds_get_current_walk_state");
if (!thread) {
return (NULL);
}
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Current walk_state %p\n",
thread->walk_state_list));
return (thread->walk_state_list);
}
/*******************************************************************************
*
* FUNCTION: acpi_ds_push_walk_state
*
* PARAMETERS: walk_state - State to push
* Thread - Thread state object
*
* RETURN: None
*
* DESCRIPTION: Place the Thread state at the head of the state list.
*
******************************************************************************/
void
acpi_ds_push_walk_state (
struct acpi_walk_state *walk_state,
struct acpi_thread_state *thread)
{
ACPI_FUNCTION_TRACE ("ds_push_walk_state");
walk_state->next = thread->walk_state_list;
thread->walk_state_list = walk_state;
return_VOID;
}
/*******************************************************************************
*
* FUNCTION: acpi_ds_pop_walk_state
*
* PARAMETERS: Thread - Current thread state
*
* RETURN: A walk_state object popped from the thread's stack
*
* DESCRIPTION: Remove and return the walkstate object that is at the head of
* the walk stack for the given walk list. NULL indicates that
* the list is empty.
*
******************************************************************************/
struct acpi_walk_state *
acpi_ds_pop_walk_state (
struct acpi_thread_state *thread)
{
struct acpi_walk_state *walk_state;
ACPI_FUNCTION_TRACE ("ds_pop_walk_state");
walk_state = thread->walk_state_list;
if (walk_state) {
/* Next walk state becomes the current walk state */
thread->walk_state_list = walk_state->next;
/*
* Don't clear the NEXT field, this serves as an indicator
* that there is a parent WALK STATE
* Do Not: walk_state->Next = NULL;
*/
}
return_PTR (walk_state);
}
/*******************************************************************************
*
* FUNCTION: acpi_ds_create_walk_state
*
* PARAMETERS: owner_id - ID for object creation
* Origin - Starting point for this walk
* mth_desc - Method object
* Thread - Current thread state
*
* RETURN: Pointer to the new walk state.
*
* DESCRIPTION: Allocate and initialize a new walk state. The current walk
* state is set to this new state.
*
******************************************************************************/
struct acpi_walk_state *
acpi_ds_create_walk_state (
acpi_owner_id owner_id,
union acpi_parse_object *origin,
union acpi_operand_object *mth_desc,
struct acpi_thread_state *thread)
{
struct acpi_walk_state *walk_state;
acpi_status status;
ACPI_FUNCTION_TRACE ("ds_create_walk_state");
walk_state = acpi_ut_acquire_from_cache (ACPI_MEM_LIST_WALK);
if (!walk_state) {
return_PTR (NULL);
}
walk_state->data_type = ACPI_DESC_TYPE_WALK;
walk_state->owner_id = owner_id;
walk_state->origin = origin;
walk_state->method_desc = mth_desc;
walk_state->thread = thread;
walk_state->parser_state.start_op = origin;
/* Init the method args/local */
#if (!defined (ACPI_NO_METHOD_EXECUTION) && !defined (ACPI_CONSTANT_EVAL_ONLY))
acpi_ds_method_data_init (walk_state);
#endif
/* Create an initial result stack entry */
status = acpi_ds_result_stack_push (walk_state);
if (ACPI_FAILURE (status)) {
acpi_ut_release_to_cache (ACPI_MEM_LIST_WALK, walk_state);
return_PTR (NULL);
}
/* Put the new state at the head of the walk list */
if (thread) {
acpi_ds_push_walk_state (walk_state, thread);
}
return_PTR (walk_state);
}
/*******************************************************************************
*
* FUNCTION: acpi_ds_init_aml_walk
*
* PARAMETERS: walk_state - New state to be initialized
* Op - Current parse op
* method_node - Control method NS node, if any
* aml_start - Start of AML
* aml_length - Length of AML
* Info - Method info block (params, etc.)
* pass_number - 1, 2, or 3
*
* RETURN: Status
*
* DESCRIPTION: Initialize a walk state for a pass 1 or 2 parse tree walk
*
******************************************************************************/
acpi_status
acpi_ds_init_aml_walk (
struct acpi_walk_state *walk_state,
union acpi_parse_object *op,
struct acpi_namespace_node *method_node,
u8 *aml_start,
u32 aml_length,
struct acpi_parameter_info *info,
u32 pass_number)
{
acpi_status status;
struct acpi_parse_state *parser_state = &walk_state->parser_state;
union acpi_parse_object *extra_op;
ACPI_FUNCTION_TRACE ("ds_init_aml_walk");
walk_state->parser_state.aml =
walk_state->parser_state.aml_start = aml_start;
walk_state->parser_state.aml_end =
walk_state->parser_state.pkg_end = aml_start + aml_length;
/* The next_op of the next_walk will be the beginning of the method */
walk_state->next_op = NULL;
if (info) {
if (info->parameter_type == ACPI_PARAM_GPE) {
walk_state->gpe_event_info = ACPI_CAST_PTR (struct acpi_gpe_event_info,
info->parameters);
}
else {
walk_state->params = info->parameters;
walk_state->caller_return_desc = &info->return_object;
}
}
status = acpi_ps_init_scope (&walk_state->parser_state, op);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
if (method_node) {
walk_state->parser_state.start_node = method_node;
walk_state->walk_type = ACPI_WALK_METHOD;
walk_state->method_node = method_node;
walk_state->method_desc = acpi_ns_get_attached_object (method_node);
/* Push start scope on scope stack and make it current */
status = acpi_ds_scope_stack_push (method_node, ACPI_TYPE_METHOD, walk_state);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Init the method arguments */
status = acpi_ds_method_data_init_args (walk_state->params,
ACPI_METHOD_NUM_ARGS, walk_state);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
}
else {
/*
* Setup the current scope.
* Find a Named Op that has a namespace node associated with it.
* search upwards from this Op. Current scope is the first
* Op with a namespace node.
*/
extra_op = parser_state->start_op;
while (extra_op && !extra_op->common.node) {
extra_op = extra_op->common.parent;
}
if (!extra_op) {
parser_state->start_node = NULL;
}
else {
parser_state->start_node = extra_op->common.node;
}
if (parser_state->start_node) {
/* Push start scope on scope stack and make it current */
status = acpi_ds_scope_stack_push (parser_state->start_node,
parser_state->start_node->type, walk_state);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
}
}
status = acpi_ds_init_callbacks (walk_state, pass_number);
return_ACPI_STATUS (status);
}
/*******************************************************************************
*
* FUNCTION: acpi_ds_delete_walk_state
*
* PARAMETERS: walk_state - State to delete
*
* RETURN: Status
*
* DESCRIPTION: Delete a walk state including all internal data structures
*
******************************************************************************/
void
acpi_ds_delete_walk_state (
struct acpi_walk_state *walk_state)
{
union acpi_generic_state *state;
ACPI_FUNCTION_TRACE_PTR ("ds_delete_walk_state", walk_state);
if (!walk_state) {
return;
}
if (walk_state->data_type != ACPI_DESC_TYPE_WALK) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "%p is not a valid walk state\n",
walk_state));
return;
}
if (walk_state->parser_state.scope) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "%p walk still has a scope list\n",
walk_state));
}
/* Always must free any linked control states */
while (walk_state->control_state) {
state = walk_state->control_state;
walk_state->control_state = state->common.next;
acpi_ut_delete_generic_state (state);
}
/* Always must free any linked parse states */
while (walk_state->scope_info) {
state = walk_state->scope_info;
walk_state->scope_info = state->common.next;
acpi_ut_delete_generic_state (state);
}
/* Always must free any stacked result states */
while (walk_state->results) {
state = walk_state->results;
walk_state->results = state->common.next;
acpi_ut_delete_generic_state (state);
}
acpi_ut_release_to_cache (ACPI_MEM_LIST_WALK, walk_state);
return_VOID;
}
#ifdef ACPI_ENABLE_OBJECT_CACHE
/******************************************************************************
*
* FUNCTION: acpi_ds_delete_walk_state_cache
*
* PARAMETERS: None
*
* RETURN: None
*
* DESCRIPTION: Purge the global state object cache. Used during subsystem
* termination.
*
******************************************************************************/
void
acpi_ds_delete_walk_state_cache (
void)
{
ACPI_FUNCTION_TRACE ("ds_delete_walk_state_cache");
acpi_ut_delete_generic_cache (ACPI_MEM_LIST_WALK);
return_VOID;
}
#endif
#ifdef ACPI_OBSOLETE_FUNCTIONS
/*******************************************************************************
*
* FUNCTION: acpi_ds_result_insert
*
* PARAMETERS: Object - Object to push
* Index - Where to insert the object
* walk_state - Current Walk state
*
* RETURN: Status
*
* DESCRIPTION: Insert an object onto this walk's result stack
*
******************************************************************************/
acpi_status
acpi_ds_result_insert (
void *object,
u32 index,
struct acpi_walk_state *walk_state)
{
union acpi_generic_state *state;
ACPI_FUNCTION_NAME ("ds_result_insert");
state = walk_state->results;
if (!state) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No result object pushed! State=%p\n",
walk_state));
return (AE_NOT_EXIST);
}
if (index >= ACPI_OBJ_NUM_OPERANDS) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Index out of range: %X Obj=%p State=%p Num=%X\n",
index, object, walk_state, state->results.num_results));
return (AE_BAD_PARAMETER);
}
if (!object) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Null Object! Index=%X Obj=%p State=%p Num=%X\n",
index, object, walk_state, state->results.num_results));
return (AE_BAD_PARAMETER);
}
state->results.obj_desc [index] = object;
state->results.num_results++;
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"Obj=%p [%s] State=%p Num=%X Cur=%X\n",
object, object ? acpi_ut_get_object_type_name ((union acpi_operand_object *) object) : "NULL",
walk_state, state->results.num_results, walk_state->current_result));
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ds_obj_stack_delete_all
*
* PARAMETERS: walk_state - Current Walk state
*
* RETURN: Status
*
* DESCRIPTION: Clear the object stack by deleting all objects that are on it.
* Should be used with great care, if at all!
*
******************************************************************************/
acpi_status
acpi_ds_obj_stack_delete_all (
struct acpi_walk_state *walk_state)
{
u32 i;
ACPI_FUNCTION_TRACE_PTR ("ds_obj_stack_delete_all", walk_state);
/* The stack size is configurable, but fixed */
for (i = 0; i < ACPI_OBJ_NUM_OPERANDS; i++) {
if (walk_state->operands[i]) {
acpi_ut_remove_reference (walk_state->operands[i]);
walk_state->operands[i] = NULL;
}
}
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ds_obj_stack_pop_object
*
* PARAMETERS: Object - Where to return the popped object
* walk_state - Current Walk state
*
* RETURN: Status
*
* DESCRIPTION: Pop this walk's object stack. Objects on the stack are NOT
* deleted by this routine.
*
******************************************************************************/
acpi_status
acpi_ds_obj_stack_pop_object (
union acpi_operand_object **object,
struct acpi_walk_state *walk_state)
{
ACPI_FUNCTION_NAME ("ds_obj_stack_pop_object");
/* Check for stack underflow */
if (walk_state->num_operands == 0) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Missing operand/stack empty! State=%p #Ops=%X\n",
walk_state, walk_state->num_operands));
*object = NULL;
return (AE_AML_NO_OPERAND);
}
/* Pop the stack */
walk_state->num_operands--;
/* Check for a valid operand */
if (!walk_state->operands [walk_state->num_operands]) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Null operand! State=%p #Ops=%X\n",
walk_state, walk_state->num_operands));
*object = NULL;
return (AE_AML_NO_OPERAND);
}
/* Get operand and set stack entry to null */
*object = walk_state->operands [walk_state->num_operands];
walk_state->operands [walk_state->num_operands] = NULL;
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p [%s] State=%p #Ops=%X\n",
*object, acpi_ut_get_object_type_name (*object),
walk_state, walk_state->num_operands));
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ds_obj_stack_get_value
*
* PARAMETERS: Index - Stack index whose value is desired. Based
* on the top of the stack (index=0 == top)
* walk_state - Current Walk state
*
* RETURN: Pointer to the requested operand
*
* DESCRIPTION: Retrieve an object from this walk's operand stack. Index must
* be within the range of the current stack pointer.
*
******************************************************************************/
void *
acpi_ds_obj_stack_get_value (
u32 index,
struct acpi_walk_state *walk_state)
{
ACPI_FUNCTION_TRACE_PTR ("ds_obj_stack_get_value", walk_state);
/* Can't do it if the stack is empty */
if (walk_state->num_operands == 0) {
return_PTR (NULL);
}
/* or if the index is past the top of the stack */
if (index > (walk_state->num_operands - (u32) 1)) {
return_PTR (NULL);
}
return_PTR (walk_state->operands[(acpi_native_uint)(walk_state->num_operands - 1) -
index]);
}
#endif
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