682 lines
19 KiB
C
682 lines
19 KiB
C
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// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
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/*******************************************************************************
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*
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* Module Name: dsmthdat - control method arguments and local variables
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*
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******************************************************************************/
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#include <acpi/acpi.h>
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#include "accommon.h"
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#include "acdispat.h"
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#include "acnamesp.h"
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#include "acinterp.h"
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#define _COMPONENT ACPI_DISPATCHER
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ACPI_MODULE_NAME("dsmthdat")
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/* Local prototypes */
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static void
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acpi_ds_method_data_delete_value(u8 type,
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u32 index, struct acpi_walk_state *walk_state);
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static acpi_status
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acpi_ds_method_data_set_value(u8 type,
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u32 index,
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union acpi_operand_object *object,
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struct acpi_walk_state *walk_state);
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#ifdef ACPI_OBSOLETE_FUNCTIONS
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acpi_object_type
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acpi_ds_method_data_get_type(u16 opcode,
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u32 index, struct acpi_walk_state *walk_state);
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#endif
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_method_data_init
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*
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* PARAMETERS: walk_state - Current walk state object
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*
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* RETURN: Status
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*
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* DESCRIPTION: Initialize the data structures that hold the method's arguments
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* and locals. The data struct is an array of namespace nodes for
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* each - this allows ref_of and de_ref_of to work properly for these
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* special data types.
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*
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* NOTES: walk_state fields are initialized to zero by the
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* ACPI_ALLOCATE_ZEROED().
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*
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* A pseudo-Namespace Node is assigned to each argument and local
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* so that ref_of() can return a pointer to the Node.
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*
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******************************************************************************/
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void acpi_ds_method_data_init(struct acpi_walk_state *walk_state)
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{
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u32 i;
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ACPI_FUNCTION_TRACE(ds_method_data_init);
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/* Init the method arguments */
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for (i = 0; i < ACPI_METHOD_NUM_ARGS; i++) {
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ACPI_MOVE_32_TO_32(&walk_state->arguments[i].name,
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NAMEOF_ARG_NTE);
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walk_state->arguments[i].name.integer |= (i << 24);
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walk_state->arguments[i].descriptor_type = ACPI_DESC_TYPE_NAMED;
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walk_state->arguments[i].type = ACPI_TYPE_ANY;
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walk_state->arguments[i].flags = ANOBJ_METHOD_ARG;
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}
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/* Init the method locals */
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for (i = 0; i < ACPI_METHOD_NUM_LOCALS; i++) {
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ACPI_MOVE_32_TO_32(&walk_state->local_variables[i].name,
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NAMEOF_LOCAL_NTE);
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walk_state->local_variables[i].name.integer |= (i << 24);
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walk_state->local_variables[i].descriptor_type =
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ACPI_DESC_TYPE_NAMED;
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walk_state->local_variables[i].type = ACPI_TYPE_ANY;
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walk_state->local_variables[i].flags = ANOBJ_METHOD_LOCAL;
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}
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_method_data_delete_all
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*
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* PARAMETERS: walk_state - Current walk state object
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*
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* RETURN: None
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*
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* DESCRIPTION: Delete method locals and arguments. Arguments are only
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* deleted if this method was called from another method.
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*
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******************************************************************************/
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void acpi_ds_method_data_delete_all(struct acpi_walk_state *walk_state)
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{
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u32 index;
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ACPI_FUNCTION_TRACE(ds_method_data_delete_all);
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/* Detach the locals */
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for (index = 0; index < ACPI_METHOD_NUM_LOCALS; index++) {
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if (walk_state->local_variables[index].object) {
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Deleting Local%u=%p\n",
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index,
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walk_state->local_variables[index].
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object));
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/* Detach object (if present) and remove a reference */
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acpi_ns_detach_object(&walk_state->
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local_variables[index]);
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}
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}
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/* Detach the arguments */
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for (index = 0; index < ACPI_METHOD_NUM_ARGS; index++) {
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if (walk_state->arguments[index].object) {
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Deleting Arg%u=%p\n",
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index,
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walk_state->arguments[index].object));
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/* Detach object (if present) and remove a reference */
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acpi_ns_detach_object(&walk_state->arguments[index]);
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}
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}
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ds_method_data_init_args
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*
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* PARAMETERS: *params - Pointer to a parameter list for the method
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* max_param_count - The arg count for this method
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* walk_state - Current walk state object
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*
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* RETURN: Status
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*
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* DESCRIPTION: Initialize arguments for a method. The parameter list is a list
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* of ACPI operand objects, either null terminated or whose length
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* is defined by max_param_count.
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*
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******************************************************************************/
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acpi_status
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acpi_ds_method_data_init_args(union acpi_operand_object **params,
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u32 max_param_count,
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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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u32 index = 0;
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ACPI_FUNCTION_TRACE_PTR(ds_method_data_init_args, params);
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if (!params) {
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
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"No parameter list passed to method\n"));
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return_ACPI_STATUS(AE_OK);
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}
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/* Copy passed parameters into the new method stack frame */
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while ((index < ACPI_METHOD_NUM_ARGS) &&
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(index < max_param_count) && params[index]) {
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/*
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* A valid parameter.
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* Store the argument in the method/walk descriptor.
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* Do not copy the arg in order to implement call by reference
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*/
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status =
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acpi_ds_method_data_set_value(ACPI_REFCLASS_ARG, index,
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params[index], walk_state);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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index++;
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}
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "%u args passed to method\n", index));
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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_method_data_get_node
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*
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* PARAMETERS: type - Either ACPI_REFCLASS_LOCAL or
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* ACPI_REFCLASS_ARG
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* index - Which Local or Arg whose type to get
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* walk_state - Current walk state object
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* node - Where the node is returned.
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*
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* RETURN: Status and node
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*
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* DESCRIPTION: Get the Node associated with a local or arg.
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*
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******************************************************************************/
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acpi_status
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acpi_ds_method_data_get_node(u8 type,
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u32 index,
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struct acpi_walk_state *walk_state,
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struct acpi_namespace_node **node)
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{
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ACPI_FUNCTION_TRACE(ds_method_data_get_node);
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/*
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* Method Locals and Arguments are supported
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*/
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switch (type) {
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case ACPI_REFCLASS_LOCAL:
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if (index > ACPI_METHOD_MAX_LOCAL) {
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ACPI_ERROR((AE_INFO,
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"Local index %u is invalid (max %u)",
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index, ACPI_METHOD_MAX_LOCAL));
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return_ACPI_STATUS(AE_AML_INVALID_INDEX);
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}
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/* Return a pointer to the pseudo-node */
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*node = &walk_state->local_variables[index];
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break;
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case ACPI_REFCLASS_ARG:
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if (index > ACPI_METHOD_MAX_ARG) {
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ACPI_ERROR((AE_INFO,
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"Arg index %u is invalid (max %u)",
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index, ACPI_METHOD_MAX_ARG));
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return_ACPI_STATUS(AE_AML_INVALID_INDEX);
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}
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/* Return a pointer to the pseudo-node */
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*node = &walk_state->arguments[index];
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break;
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default:
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ACPI_ERROR((AE_INFO, "Type %u is invalid", type));
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return_ACPI_STATUS(AE_TYPE);
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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_method_data_set_value
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*
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* PARAMETERS: type - Either ACPI_REFCLASS_LOCAL or
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* ACPI_REFCLASS_ARG
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* index - Which Local or Arg to get
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* object - Object to be inserted into the stack entry
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* walk_state - Current walk state object
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*
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* RETURN: Status
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*
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* DESCRIPTION: Insert an object onto the method stack at entry Opcode:Index.
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* Note: There is no "implicit conversion" for locals.
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*
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******************************************************************************/
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static acpi_status
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acpi_ds_method_data_set_value(u8 type,
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u32 index,
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union acpi_operand_object *object,
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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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struct acpi_namespace_node *node;
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ACPI_FUNCTION_TRACE(ds_method_data_set_value);
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
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"NewObj %p Type %2.2X, Refs=%u [%s]\n", object,
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type, object->common.reference_count,
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acpi_ut_get_type_name(object->common.type)));
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/* Get the namespace node for the arg/local */
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status = acpi_ds_method_data_get_node(type, index, walk_state, &node);
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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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* Increment ref count so object can't be deleted while installed.
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* NOTE: We do not copy the object in order to preserve the call by
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* reference semantics of ACPI Control Method invocation.
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* (See ACPI Specification 2.0C)
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*/
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acpi_ut_add_reference(object);
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/* Install the object */
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node->object = object;
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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_method_data_get_value
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*
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* PARAMETERS: type - Either ACPI_REFCLASS_LOCAL or
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* ACPI_REFCLASS_ARG
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* index - Which localVar or argument to get
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* walk_state - Current walk state object
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* dest_desc - Where Arg or Local value is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Retrieve value of selected Arg or Local for this method
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* Used only in acpi_ex_resolve_to_value().
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*
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******************************************************************************/
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acpi_status
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acpi_ds_method_data_get_value(u8 type,
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u32 index,
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struct acpi_walk_state *walk_state,
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union acpi_operand_object **dest_desc)
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{
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acpi_status status;
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struct acpi_namespace_node *node;
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union acpi_operand_object *object;
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ACPI_FUNCTION_TRACE(ds_method_data_get_value);
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/* Validate the object descriptor */
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if (!dest_desc) {
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ACPI_ERROR((AE_INFO, "Null object descriptor pointer"));
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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/* Get the namespace node for the arg/local */
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status = acpi_ds_method_data_get_node(type, index, walk_state, &node);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/* Get the object from the node */
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object = node->object;
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/* Examine the returned object, it must be valid. */
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if (!object) {
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/*
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* Index points to uninitialized object.
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* This means that either 1) The expected argument was
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* not passed to the method, or 2) A local variable
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* was referenced by the method (via the ASL)
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* before it was initialized. Either case is an error.
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*/
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/* If slack enabled, init the local_x/arg_x to an Integer of value zero */
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if (acpi_gbl_enable_interpreter_slack) {
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object = acpi_ut_create_integer_object((u64) 0);
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if (!object) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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node->object = object;
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}
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/* Otherwise, return the error */
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else
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switch (type) {
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case ACPI_REFCLASS_ARG:
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ACPI_ERROR((AE_INFO,
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"Uninitialized Arg[%u] at node %p",
|
||
|
|
index, node));
|
||
|
|
|
||
|
|
return_ACPI_STATUS(AE_AML_UNINITIALIZED_ARG);
|
||
|
|
|
||
|
|
case ACPI_REFCLASS_LOCAL:
|
||
|
|
/*
|
||
|
|
* No error message for this case, will be trapped again later to
|
||
|
|
* detect and ignore cases of Store(local_x,local_x)
|
||
|
|
*/
|
||
|
|
return_ACPI_STATUS(AE_AML_UNINITIALIZED_LOCAL);
|
||
|
|
|
||
|
|
default:
|
||
|
|
|
||
|
|
ACPI_ERROR((AE_INFO,
|
||
|
|
"Not a Arg/Local opcode: 0x%X",
|
||
|
|
type));
|
||
|
|
return_ACPI_STATUS(AE_AML_INTERNAL);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The Index points to an initialized and valid object.
|
||
|
|
* Return an additional reference to the object
|
||
|
|
*/
|
||
|
|
*dest_desc = object;
|
||
|
|
acpi_ut_add_reference(object);
|
||
|
|
|
||
|
|
return_ACPI_STATUS(AE_OK);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
*
|
||
|
|
* FUNCTION: acpi_ds_method_data_delete_value
|
||
|
|
*
|
||
|
|
* PARAMETERS: type - Either ACPI_REFCLASS_LOCAL or
|
||
|
|
* ACPI_REFCLASS_ARG
|
||
|
|
* index - Which localVar or argument to delete
|
||
|
|
* walk_state - Current walk state object
|
||
|
|
*
|
||
|
|
* RETURN: None
|
||
|
|
*
|
||
|
|
* DESCRIPTION: Delete the entry at Opcode:Index. Inserts
|
||
|
|
* a null into the stack slot after the object is deleted.
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
static void
|
||
|
|
acpi_ds_method_data_delete_value(u8 type,
|
||
|
|
u32 index, struct acpi_walk_state *walk_state)
|
||
|
|
{
|
||
|
|
acpi_status status;
|
||
|
|
struct acpi_namespace_node *node;
|
||
|
|
union acpi_operand_object *object;
|
||
|
|
|
||
|
|
ACPI_FUNCTION_TRACE(ds_method_data_delete_value);
|
||
|
|
|
||
|
|
/* Get the namespace node for the arg/local */
|
||
|
|
|
||
|
|
status = acpi_ds_method_data_get_node(type, index, walk_state, &node);
|
||
|
|
if (ACPI_FAILURE(status)) {
|
||
|
|
return_VOID;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Get the associated object */
|
||
|
|
|
||
|
|
object = acpi_ns_get_attached_object(node);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Undefine the Arg or Local by setting its descriptor
|
||
|
|
* pointer to NULL. Locals/Args can contain both
|
||
|
|
* ACPI_OPERAND_OBJECTS and ACPI_NAMESPACE_NODEs
|
||
|
|
*/
|
||
|
|
node->object = NULL;
|
||
|
|
|
||
|
|
if ((object) &&
|
||
|
|
(ACPI_GET_DESCRIPTOR_TYPE(object) == ACPI_DESC_TYPE_OPERAND)) {
|
||
|
|
/*
|
||
|
|
* There is a valid object.
|
||
|
|
* Decrement the reference count by one to balance the
|
||
|
|
* increment when the object was stored.
|
||
|
|
*/
|
||
|
|
acpi_ut_remove_reference(object);
|
||
|
|
}
|
||
|
|
|
||
|
|
return_VOID;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
*
|
||
|
|
* FUNCTION: acpi_ds_store_object_to_local
|
||
|
|
*
|
||
|
|
* PARAMETERS: type - Either ACPI_REFCLASS_LOCAL or
|
||
|
|
* ACPI_REFCLASS_ARG
|
||
|
|
* index - Which Local or Arg to set
|
||
|
|
* obj_desc - Value to be stored
|
||
|
|
* walk_state - Current walk state
|
||
|
|
*
|
||
|
|
* RETURN: Status
|
||
|
|
*
|
||
|
|
* DESCRIPTION: Store a value in an Arg or Local. The obj_desc is installed
|
||
|
|
* as the new value for the Arg or Local and the reference count
|
||
|
|
* for obj_desc is incremented.
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
acpi_status
|
||
|
|
acpi_ds_store_object_to_local(u8 type,
|
||
|
|
u32 index,
|
||
|
|
union acpi_operand_object *obj_desc,
|
||
|
|
struct acpi_walk_state *walk_state)
|
||
|
|
{
|
||
|
|
acpi_status status;
|
||
|
|
struct acpi_namespace_node *node;
|
||
|
|
union acpi_operand_object *current_obj_desc;
|
||
|
|
union acpi_operand_object *new_obj_desc;
|
||
|
|
|
||
|
|
ACPI_FUNCTION_TRACE(ds_store_object_to_local);
|
||
|
|
ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Type=%2.2X Index=%u Obj=%p\n",
|
||
|
|
type, index, obj_desc));
|
||
|
|
|
||
|
|
/* Parameter validation */
|
||
|
|
|
||
|
|
if (!obj_desc) {
|
||
|
|
return_ACPI_STATUS(AE_BAD_PARAMETER);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Get the namespace node for the arg/local */
|
||
|
|
|
||
|
|
status = acpi_ds_method_data_get_node(type, index, walk_state, &node);
|
||
|
|
if (ACPI_FAILURE(status)) {
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
|
||
|
|
current_obj_desc = acpi_ns_get_attached_object(node);
|
||
|
|
if (current_obj_desc == obj_desc) {
|
||
|
|
ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Obj=%p already installed!\n",
|
||
|
|
obj_desc));
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* If the reference count on the object is more than one, we must
|
||
|
|
* take a copy of the object before we store. A reference count
|
||
|
|
* of exactly 1 means that the object was just created during the
|
||
|
|
* evaluation of an expression, and we can safely use it since it
|
||
|
|
* is not used anywhere else.
|
||
|
|
*/
|
||
|
|
new_obj_desc = obj_desc;
|
||
|
|
if (obj_desc->common.reference_count > 1) {
|
||
|
|
status =
|
||
|
|
acpi_ut_copy_iobject_to_iobject(obj_desc, &new_obj_desc,
|
||
|
|
walk_state);
|
||
|
|
if (ACPI_FAILURE(status)) {
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* If there is an object already in this slot, we either
|
||
|
|
* have to delete it, or if this is an argument and there
|
||
|
|
* is an object reference stored there, we have to do
|
||
|
|
* an indirect store!
|
||
|
|
*/
|
||
|
|
if (current_obj_desc) {
|
||
|
|
/*
|
||
|
|
* Check for an indirect store if an argument
|
||
|
|
* contains an object reference (stored as an Node).
|
||
|
|
* We don't allow this automatic dereferencing for
|
||
|
|
* locals, since a store to a local should overwrite
|
||
|
|
* anything there, including an object reference.
|
||
|
|
*
|
||
|
|
* If both Arg0 and Local0 contain ref_of (Local4):
|
||
|
|
*
|
||
|
|
* Store (1, Arg0) - Causes indirect store to local4
|
||
|
|
* Store (1, Local0) - Stores 1 in local0, overwriting
|
||
|
|
* the reference to local4
|
||
|
|
* Store (1, de_refof (Local0)) - Causes indirect store to local4
|
||
|
|
*
|
||
|
|
* Weird, but true.
|
||
|
|
*/
|
||
|
|
if (type == ACPI_REFCLASS_ARG) {
|
||
|
|
/*
|
||
|
|
* If we have a valid reference object that came from ref_of(),
|
||
|
|
* do the indirect store
|
||
|
|
*/
|
||
|
|
if ((ACPI_GET_DESCRIPTOR_TYPE(current_obj_desc) ==
|
||
|
|
ACPI_DESC_TYPE_OPERAND) &&
|
||
|
|
(current_obj_desc->common.type ==
|
||
|
|
ACPI_TYPE_LOCAL_REFERENCE) &&
|
||
|
|
(current_obj_desc->reference.class ==
|
||
|
|
ACPI_REFCLASS_REFOF)) {
|
||
|
|
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
|
||
|
|
"Arg (%p) is an ObjRef(Node), storing in node %p\n",
|
||
|
|
new_obj_desc,
|
||
|
|
current_obj_desc));
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Store this object to the Node (perform the indirect store)
|
||
|
|
* NOTE: No implicit conversion is performed, as per the ACPI
|
||
|
|
* specification rules on storing to Locals/Args.
|
||
|
|
*/
|
||
|
|
status =
|
||
|
|
acpi_ex_store_object_to_node(new_obj_desc,
|
||
|
|
current_obj_desc->
|
||
|
|
reference.
|
||
|
|
object,
|
||
|
|
walk_state,
|
||
|
|
ACPI_NO_IMPLICIT_CONVERSION);
|
||
|
|
|
||
|
|
/* Remove local reference if we copied the object above */
|
||
|
|
|
||
|
|
if (new_obj_desc != obj_desc) {
|
||
|
|
acpi_ut_remove_reference(new_obj_desc);
|
||
|
|
}
|
||
|
|
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Delete the existing object before storing the new one */
|
||
|
|
|
||
|
|
acpi_ds_method_data_delete_value(type, index, walk_state);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Install the Obj descriptor (*new_obj_desc) into
|
||
|
|
* the descriptor for the Arg or Local.
|
||
|
|
* (increments the object reference count by one)
|
||
|
|
*/
|
||
|
|
status =
|
||
|
|
acpi_ds_method_data_set_value(type, index, new_obj_desc,
|
||
|
|
walk_state);
|
||
|
|
|
||
|
|
/* Remove local reference if we copied the object above */
|
||
|
|
|
||
|
|
if (new_obj_desc != obj_desc) {
|
||
|
|
acpi_ut_remove_reference(new_obj_desc);
|
||
|
|
}
|
||
|
|
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifdef ACPI_OBSOLETE_FUNCTIONS
|
||
|
|
/*******************************************************************************
|
||
|
|
*
|
||
|
|
* FUNCTION: acpi_ds_method_data_get_type
|
||
|
|
*
|
||
|
|
* PARAMETERS: opcode - Either AML_FIRST LOCAL_OP or
|
||
|
|
* AML_FIRST_ARG_OP
|
||
|
|
* index - Which Local or Arg whose type to get
|
||
|
|
* walk_state - Current walk state object
|
||
|
|
*
|
||
|
|
* RETURN: Data type of current value of the selected Arg or Local
|
||
|
|
*
|
||
|
|
* DESCRIPTION: Get the type of the object stored in the Local or Arg
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
acpi_object_type
|
||
|
|
acpi_ds_method_data_get_type(u16 opcode,
|
||
|
|
u32 index, struct acpi_walk_state *walk_state)
|
||
|
|
{
|
||
|
|
acpi_status status;
|
||
|
|
struct acpi_namespace_node *node;
|
||
|
|
union acpi_operand_object *object;
|
||
|
|
|
||
|
|
ACPI_FUNCTION_TRACE(ds_method_data_get_type);
|
||
|
|
|
||
|
|
/* Get the namespace node for the arg/local */
|
||
|
|
|
||
|
|
status = acpi_ds_method_data_get_node(opcode, index, walk_state, &node);
|
||
|
|
if (ACPI_FAILURE(status)) {
|
||
|
|
return_VALUE((ACPI_TYPE_NOT_FOUND));
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Get the object */
|
||
|
|
|
||
|
|
object = acpi_ns_get_attached_object(node);
|
||
|
|
if (!object) {
|
||
|
|
|
||
|
|
/* Uninitialized local/arg, return TYPE_ANY */
|
||
|
|
|
||
|
|
return_VALUE(ACPI_TYPE_ANY);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Get the object type */
|
||
|
|
|
||
|
|
return_VALUE(object->type);
|
||
|
|
}
|
||
|
|
#endif
|