linux-next/drivers/acpi/acpica/dbobject.c

/*******************************************************************************
 *
 * Module Name: dbobject - ACPI object decode and display
 *
 ******************************************************************************/

/*
 * Copyright (C) 2000 - 2016, Intel Corp.
 * 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 "accommon.h"
#include "acnamesp.h"
#include "acdebug.h"

#define _COMPONENT          ACPI_CA_DEBUGGER
ACPI_MODULE_NAME("dbobject")

/* Local prototypes */
static void acpi_db_decode_node(struct acpi_namespace_node *node);

/*******************************************************************************
 *
 * FUNCTION:    acpi_db_dump_method_info
 *
 * PARAMETERS:  status          - Method execution status
 *              walk_state      - Current state of the parse tree walk
 *
 * RETURN:      None
 *
 * DESCRIPTION: Called when a method has been aborted because of an error.
 *              Dumps the method execution stack, and the method locals/args,
 *              and disassembles the AML opcode that failed.
 *
 ******************************************************************************/

void
acpi_db_dump_method_info(acpi_status status, struct acpi_walk_state *walk_state)
{
	struct acpi_thread_state *thread;

	/* Ignore control codes, they are not errors */

	if ((status & AE_CODE_MASK) == AE_CODE_CONTROL) {
		return;
	}

	/* We may be executing a deferred opcode */

	if (walk_state->deferred_node) {
		acpi_os_printf("Executing subtree for Buffer/Package/Region\n");
		return;
	}

	/*
	 * If there is no Thread, we are not actually executing a method.
	 * This can happen when the iASL compiler calls the interpreter
	 * to perform constant folding.
	 */
	thread = walk_state->thread;
	if (!thread) {
		return;
	}

	/* Display the method locals and arguments */

	acpi_os_printf("\n");
	acpi_db_decode_locals(walk_state);
	acpi_os_printf("\n");
	acpi_db_decode_arguments(walk_state);
	acpi_os_printf("\n");
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_db_decode_internal_object
 *
 * PARAMETERS:  obj_desc        - Object to be displayed
 *
 * RETURN:      None
 *
 * DESCRIPTION: Short display of an internal object. Numbers/Strings/Buffers.
 *
 ******************************************************************************/

void acpi_db_decode_internal_object(union acpi_operand_object *obj_desc)
{
	u32 i;

	if (!obj_desc) {
		acpi_os_printf(" Uninitialized");
		return;
	}

	if (ACPI_GET_DESCRIPTOR_TYPE(obj_desc) != ACPI_DESC_TYPE_OPERAND) {
		acpi_os_printf(" %p [%s]", obj_desc,
			       acpi_ut_get_descriptor_name(obj_desc));
		return;
	}

	acpi_os_printf(" %s", acpi_ut_get_object_type_name(obj_desc));

	switch (obj_desc->common.type) {
	case ACPI_TYPE_INTEGER:

		acpi_os_printf(" %8.8X%8.8X",
			       ACPI_FORMAT_UINT64(obj_desc->integer.value));
		break;

	case ACPI_TYPE_STRING:

		acpi_os_printf("(%u) \"%.24s",
			       obj_desc->string.length,
			       obj_desc->string.pointer);

		if (obj_desc->string.length > 24) {
			acpi_os_printf("...");
		} else {
			acpi_os_printf("\"");
		}
		break;

	case ACPI_TYPE_BUFFER:

		acpi_os_printf("(%u)", obj_desc->buffer.length);
		for (i = 0; (i < 8) && (i < obj_desc->buffer.length); i++) {
			acpi_os_printf(" %2.2X", obj_desc->buffer.pointer[i]);
		}
		break;

	default:

		acpi_os_printf(" %p", obj_desc);
		break;
	}
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_db_decode_node
 *
 * PARAMETERS:  node        - Object to be displayed
 *
 * RETURN:      None
 *
 * DESCRIPTION: Short display of a namespace node
 *
 ******************************************************************************/

static void acpi_db_decode_node(struct acpi_namespace_node *node)
{

	acpi_os_printf("<Node>          Name %4.4s",
		       acpi_ut_get_node_name(node));

	if (node->flags & ANOBJ_METHOD_ARG) {
		acpi_os_printf(" [Method Arg]");
	}
	if (node->flags & ANOBJ_METHOD_LOCAL) {
		acpi_os_printf(" [Method Local]");
	}

	switch (node->type) {

		/* These types have no attached object */

	case ACPI_TYPE_DEVICE:

		acpi_os_printf(" Device");
		break;

	case ACPI_TYPE_THERMAL:

		acpi_os_printf(" Thermal Zone");
		break;

	default:

		acpi_db_decode_internal_object(acpi_ns_get_attached_object
					       (node));
		break;
	}
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_db_display_internal_object
 *
 * PARAMETERS:  obj_desc        - Object to be displayed
 *              walk_state      - Current walk state
 *
 * RETURN:      None
 *
 * DESCRIPTION: Short display of an internal object
 *
 ******************************************************************************/

void
acpi_db_display_internal_object(union acpi_operand_object *obj_desc,
				struct acpi_walk_state *walk_state)
{
	u8 type;

	acpi_os_printf("%p ", obj_desc);

	if (!obj_desc) {
		acpi_os_printf("<Null Object>\n");
		return;
	}

	/* Decode the object type */

	switch (ACPI_GET_DESCRIPTOR_TYPE(obj_desc)) {
	case ACPI_DESC_TYPE_PARSER:

		acpi_os_printf("<Parser> ");
		break;

	case ACPI_DESC_TYPE_NAMED:

		acpi_db_decode_node((struct acpi_namespace_node *)obj_desc);
		break;

	case ACPI_DESC_TYPE_OPERAND:

		type = obj_desc->common.type;
		if (type > ACPI_TYPE_LOCAL_MAX) {
			acpi_os_printf(" Type %X [Invalid Type]", (u32)type);
			return;
		}

		/* Decode the ACPI object type */

		switch (obj_desc->common.type) {
		case ACPI_TYPE_LOCAL_REFERENCE:

			acpi_os_printf("[%s] ",
				       acpi_ut_get_reference_name(obj_desc));

			/* Decode the refererence */

			switch (obj_desc->reference.class) {
			case ACPI_REFCLASS_LOCAL:

				acpi_os_printf("%X ",
					       obj_desc->reference.value);
				if (walk_state) {
					obj_desc = walk_state->local_variables
					    [obj_desc->reference.value].object;
					acpi_os_printf("%p", obj_desc);
					acpi_db_decode_internal_object
					    (obj_desc);
				}
				break;

			case ACPI_REFCLASS_ARG:

				acpi_os_printf("%X ",
					       obj_desc->reference.value);
				if (walk_state) {
					obj_desc = walk_state->arguments
					    [obj_desc->reference.value].object;
					acpi_os_printf("%p", obj_desc);
					acpi_db_decode_internal_object
					    (obj_desc);
				}
				break;

			case ACPI_REFCLASS_INDEX:

				switch (obj_desc->reference.target_type) {
				case ACPI_TYPE_BUFFER_FIELD:

					acpi_os_printf("%p",
						       obj_desc->reference.
						       object);
					acpi_db_decode_internal_object
					    (obj_desc->reference.object);
					break;

				case ACPI_TYPE_PACKAGE:

					acpi_os_printf("%p",
						       obj_desc->reference.
						       where);
					if (!obj_desc->reference.where) {
						acpi_os_printf
						    (" Uninitialized WHERE pointer");
					} else {
						acpi_db_decode_internal_object(*
									       (obj_desc->
										reference.
										where));
					}
					break;

				default:

					acpi_os_printf
					    ("Unknown index target type");
					break;
				}
				break;

			case ACPI_REFCLASS_REFOF:

				if (!obj_desc->reference.object) {
					acpi_os_printf
					    ("Uninitialized reference subobject pointer");
					break;
				}

				/* Reference can be to a Node or an Operand object */

				switch (ACPI_GET_DESCRIPTOR_TYPE
					(obj_desc->reference.object)) {
				case ACPI_DESC_TYPE_NAMED:

					acpi_db_decode_node(obj_desc->reference.
							    object);
					break;

				case ACPI_DESC_TYPE_OPERAND:

					acpi_db_decode_internal_object
					    (obj_desc->reference.object);
					break;

				default:
					break;
				}
				break;

			case ACPI_REFCLASS_NAME:

				acpi_db_decode_node(obj_desc->reference.node);
				break;

			case ACPI_REFCLASS_DEBUG:
			case ACPI_REFCLASS_TABLE:

				acpi_os_printf("\n");
				break;

			default:	/* Unknown reference class */

				acpi_os_printf("%2.2X\n",
					       obj_desc->reference.class);
				break;
			}
			break;

		default:

			acpi_os_printf("<Obj>          ");
			acpi_db_decode_internal_object(obj_desc);
			break;
		}
		break;

	default:

		acpi_os_printf("<Not a valid ACPI Object Descriptor> [%s]",
			       acpi_ut_get_descriptor_name(obj_desc));
		break;
	}

	acpi_os_printf("\n");
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_db_decode_locals
 *
 * PARAMETERS:  walk_state      - State for current method
 *
 * RETURN:      None
 *
 * DESCRIPTION: Display all locals for the currently running control method
 *
 ******************************************************************************/

void acpi_db_decode_locals(struct acpi_walk_state *walk_state)
{
	u32 i;
	union acpi_operand_object *obj_desc;
	struct acpi_namespace_node *node;
	u8 display_locals = FALSE;

	obj_desc = walk_state->method_desc;
	node = walk_state->method_node;

	if (!node) {
		acpi_os_printf
		    ("No method node (Executing subtree for buffer or opregion)\n");
		return;
	}

	if (node->type != ACPI_TYPE_METHOD) {
		acpi_os_printf("Executing subtree for Buffer/Package/Region\n");
		return;
	}

	/* Are any locals actually set? */

	for (i = 0; i < ACPI_METHOD_NUM_LOCALS; i++) {
		obj_desc = walk_state->local_variables[i].object;
		if (obj_desc) {
			display_locals = TRUE;
			break;
		}
	}

	/* If any are set, only display the ones that are set */

	if (display_locals) {
		acpi_os_printf
		    ("\nInitialized Local Variables for method [%4.4s]:\n",
		     acpi_ut_get_node_name(node));

		for (i = 0; i < ACPI_METHOD_NUM_LOCALS; i++) {
			obj_desc = walk_state->local_variables[i].object;
			if (obj_desc) {
				acpi_os_printf("  Local%X: ", i);
				acpi_db_display_internal_object(obj_desc,
								walk_state);
			}
		}
	} else {
		acpi_os_printf
		    ("No Local Variables are initialized for method [%4.4s]\n",
		     acpi_ut_get_node_name(node));
	}
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_db_decode_arguments
 *
 * PARAMETERS:  walk_state      - State for current method
 *
 * RETURN:      None
 *
 * DESCRIPTION: Display all arguments for the currently running control method
 *
 ******************************************************************************/

void acpi_db_decode_arguments(struct acpi_walk_state *walk_state)
{
	u32 i;
	union acpi_operand_object *obj_desc;
	struct acpi_namespace_node *node;
	u8 display_args = FALSE;

	node = walk_state->method_node;
	obj_desc = walk_state->method_desc;

	if (!node) {
		acpi_os_printf
		    ("No method node (Executing subtree for buffer or opregion)\n");
		return;
	}

	if (node->type != ACPI_TYPE_METHOD) {
		acpi_os_printf("Executing subtree for Buffer/Package/Region\n");
		return;
	}

	/* Are any arguments actually set? */

	for (i = 0; i < ACPI_METHOD_NUM_ARGS; i++) {
		obj_desc = walk_state->arguments[i].object;
		if (obj_desc) {
			display_args = TRUE;
			break;
		}
	}

	/* If any are set, only display the ones that are set */

	if (display_args) {
		acpi_os_printf("Initialized Arguments for Method [%4.4s]:  "
			       "(%X arguments defined for method invocation)\n",
			       acpi_ut_get_node_name(node),
			       obj_desc->method.param_count);

		for (i = 0; i < ACPI_METHOD_NUM_ARGS; i++) {
			obj_desc = walk_state->arguments[i].object;
			if (obj_desc) {
				acpi_os_printf("  Arg%u:   ", i);
				acpi_db_display_internal_object(obj_desc,
								walk_state);
			}
		}
	} else {
		acpi_os_printf
		    ("No Arguments are initialized for method [%4.4s]\n",
		     acpi_ut_get_node_name(node));
	}
}