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/******************************************************************************

 *

 * Module Name: dsopcode - Dispatcher support for regions and fields

 *

 *****************************************************************************/

/*

 * Copyright (C) 2000 - 2015, 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 

#include "accommon.h"

#include "acparser.h"

#include "amlcode.h"

#include "acdispat.h"

#include "acinterp.h"

#include "acnamesp.h"

#include "acevents.h"

#include "actables.h"

#define _COMPONENT          ACPI_DISPATCHER

ACPI_MODULE_NAME("dsopcode")

/* Local prototypes */

static acpi_status

acpi_ds_init_buffer_field(u16 aml_opcode,

			  union acpi_operand_object *obj_desc,

			  union acpi_operand_object *buffer_desc,

			  union acpi_operand_object *offset_desc,

			  union acpi_operand_object *length_desc,

			  union acpi_operand_object *result_desc);

/*******************************************************************************

 *

 * FUNCTION:    acpi_ds_initialize_region

 *

 * PARAMETERS:  obj_handle      - Region namespace node

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Front end to ev_initialize_region

 *

 ******************************************************************************/

acpi_status acpi_ds_initialize_region(acpi_handle obj_handle)

{

	union acpi_operand_object *obj_desc;

	acpi_status status;

	obj_desc = acpi_ns_get_attached_object(obj_handle);

	/* Namespace is NOT locked */

	status = acpi_ev_initialize_region(obj_desc, FALSE);

	return (status);

}

/*******************************************************************************

 *

 * FUNCTION:    acpi_ds_init_buffer_field

 *

 * PARAMETERS:  aml_opcode      - create_xxx_field

 *              obj_desc        - buffer_field object

 *              buffer_desc     - Host Buffer

 *              offset_desc     - Offset into buffer

 *              length_desc     - Length of field (CREATE_FIELD_OP only)

 *              result_desc     - Where to store the result

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Perform actual initialization of a buffer field

 *

 ******************************************************************************/

static acpi_status

acpi_ds_init_buffer_field(u16 aml_opcode,

			  union acpi_operand_object *obj_desc,

			  union acpi_operand_object *buffer_desc,

			  union acpi_operand_object *offset_desc,

			  union acpi_operand_object *length_desc,

			  union acpi_operand_object *result_desc)

{

	u32 offset;

	u32 bit_offset;

	u32 bit_count;

	u8 field_flags;

	acpi_status status;

	ACPI_FUNCTION_TRACE_PTR(ds_init_buffer_field, obj_desc);

	/* Host object must be a Buffer */

	if (buffer_desc->common.type != ACPI_TYPE_BUFFER) {

		ACPI_ERROR((AE_INFO,

			    "Target of Create Field is not a Buffer object - %s",

			    acpi_ut_get_object_type_name(buffer_desc)));

		status = AE_AML_OPERAND_TYPE;

		goto cleanup;

	}

	/*

	 * The last parameter to all of these opcodes (result_desc) started

	 * out as a name_string, and should therefore now be a NS node

	 * after resolution in acpi_ex_resolve_operands().

	 */

	if (ACPI_GET_DESCRIPTOR_TYPE(result_desc) != ACPI_DESC_TYPE_NAMED) {

		ACPI_ERROR((AE_INFO,

			    "(%s) destination not a NS Node [%s]",

			    acpi_ps_get_opcode_name(aml_opcode),

			    acpi_ut_get_descriptor_name(result_desc)));

		status = AE_AML_OPERAND_TYPE;

		goto cleanup;

	}

	offset = (u32) offset_desc->integer.value;

	/*

	 * Setup the Bit offsets and counts, according to the opcode

	 */

	switch (aml_opcode) {

	case AML_CREATE_FIELD_OP:

		/* Offset is in bits, count is in bits */

		field_flags = AML_FIELD_ACCESS_BYTE;

		bit_offset = offset;

		bit_count = (u32) length_desc->integer.value;

		/* Must have a valid (>0) bit count */

		if (bit_count == 0) {

			ACPI_ERROR((AE_INFO,

				    "Attempt to CreateField of length zero"));

			status = AE_AML_OPERAND_VALUE;

			goto cleanup;

		}

		break;

	case AML_CREATE_BIT_FIELD_OP:

		/* Offset is in bits, Field is one bit */

		bit_offset = offset;

		bit_count = 1;

		field_flags = AML_FIELD_ACCESS_BYTE;

		break;

	case AML_CREATE_BYTE_FIELD_OP:

		/* Offset is in bytes, field is one byte */

		bit_offset = 8 * offset;

		bit_count = 8;

		field_flags = AML_FIELD_ACCESS_BYTE;

		break;

	case AML_CREATE_WORD_FIELD_OP:

		/* Offset is in bytes, field is one word */

		bit_offset = 8 * offset;

		bit_count = 16;

		field_flags = AML_FIELD_ACCESS_WORD;

		break;

	case AML_CREATE_DWORD_FIELD_OP:

		/* Offset is in bytes, field is one dword */

		bit_offset = 8 * offset;

		bit_count = 32;

		field_flags = AML_FIELD_ACCESS_DWORD;

		break;

	case AML_CREATE_QWORD_FIELD_OP:

		/* Offset is in bytes, field is one qword */

		bit_offset = 8 * offset;

		bit_count = 64;

		field_flags = AML_FIELD_ACCESS_QWORD;

		break;

	default:

		ACPI_ERROR((AE_INFO,

			    "Unknown field creation opcode 0x%02X",

			    aml_opcode));

		status = AE_AML_BAD_OPCODE;

		goto cleanup;

	}

	/* Entire field must fit within the current length of the buffer */

	if ((bit_offset + bit_count) > (8 * (u32) buffer_desc->buffer.length)) {

		ACPI_ERROR((AE_INFO,

			    "Field [%4.4s] at %u exceeds Buffer [%4.4s] size %u (bits)",

			    acpi_ut_get_node_name(result_desc),

			    bit_offset + bit_count,

			    acpi_ut_get_node_name(buffer_desc->buffer.node),

			    8 * (u32) buffer_desc->buffer.length));

		status = AE_AML_BUFFER_LIMIT;

		goto cleanup;

	}

	/*

	 * Initialize areas of the field object that are common to all fields

	 * For field_flags, use LOCK_RULE = 0 (NO_LOCK),

	 * UPDATE_RULE = 0 (UPDATE_PRESERVE)

	 */

	status = acpi_ex_prep_common_field_object(obj_desc, field_flags, 0,

						  bit_offset, bit_count);

	if (ACPI_FAILURE(status)) {

		goto cleanup;

	}

	obj_desc->buffer_field.buffer_obj = buffer_desc;

	/* Reference count for buffer_desc inherits obj_desc count */

	buffer_desc->common.reference_count = (u16)

	    (buffer_desc->common.reference_count +

	     obj_desc->common.reference_count);

cleanup:

	/* Always delete the operands */

	acpi_ut_remove_reference(offset_desc);

	acpi_ut_remove_reference(buffer_desc);

	if (aml_opcode == AML_CREATE_FIELD_OP) {

		acpi_ut_remove_reference(length_desc);

	}

	/* On failure, delete the result descriptor */

	if (ACPI_FAILURE(status)) {

		acpi_ut_remove_reference(result_desc);	/* Result descriptor */

	} else {

		/* Now the address and length are valid for this buffer_field */

		obj_desc->buffer_field.flags |= AOPOBJ_DATA_VALID;

	}

	return_ACPI_STATUS(status);

}

/*******************************************************************************

 *

 * FUNCTION:    acpi_ds_eval_buffer_field_operands

 *

 * PARAMETERS:  walk_state      - Current walk

 *              op              - A valid buffer_field Op object

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Get buffer_field Buffer and Index

 *              Called from acpi_ds_exec_end_op during buffer_field parse tree walk

 *

 ******************************************************************************/

acpi_status

acpi_ds_eval_buffer_field_operands(struct acpi_walk_state *walk_state,

				   union acpi_parse_object *op)

{

	acpi_status status;

	union acpi_operand_object *obj_desc;

	struct acpi_namespace_node *node;

	union acpi_parse_object *next_op;

	ACPI_FUNCTION_TRACE_PTR(ds_eval_buffer_field_operands, op);

	/*

	 * This is where we evaluate the address and length fields of the

	 * create_xxx_field declaration

	 */

	node = op->common.node;

	/* next_op points to the op that holds the Buffer */

	next_op = op->common.value.arg;

	/* Evaluate/create the address and length operands */

	status = acpi_ds_create_operands(walk_state, next_op);

	if (ACPI_FAILURE(status)) {

		return_ACPI_STATUS(status);

	}

	obj_desc = acpi_ns_get_attached_object(node);

	if (!obj_desc) {

		return_ACPI_STATUS(AE_NOT_EXIST);

	}

	/* Resolve the operands */

	status = acpi_ex_resolve_operands(op->common.aml_opcode,

					  ACPI_WALK_OPERANDS, walk_state);

	if (ACPI_FAILURE(status)) {

		ACPI_ERROR((AE_INFO, "(%s) bad operand(s), status 0x%X",

			    acpi_ps_get_opcode_name(op->common.aml_opcode),

			    status));

		return_ACPI_STATUS(status);

	}

	/* Initialize the Buffer Field */

	if (op->common.aml_opcode == AML_CREATE_FIELD_OP) {

		/* NOTE: Slightly different operands for this opcode */

		status =

		    acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc,

					      walk_state->operands[0],

					      walk_state->operands[1],

					      walk_state->operands[2],

					      walk_state->operands[3]);

	} else {

		/* All other, create_xxx_field opcodes */

		status =

		    acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc,

					      walk_state->operands[0],

					      walk_state->operands[1], NULL,

					      walk_state->operands[2]);

	}

	return_ACPI_STATUS(status);

}

/*******************************************************************************

 *

 * FUNCTION:    acpi_ds_eval_region_operands

 *

 * PARAMETERS:  walk_state      - Current walk

 *              op              - A valid region Op object

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Get region address and length

 *              Called from acpi_ds_exec_end_op during op_region parse tree walk

 *

 ******************************************************************************/

acpi_status

acpi_ds_eval_region_operands(struct acpi_walk_state *walk_state,

			     union acpi_parse_object *op)

{

	acpi_status status;

	union acpi_operand_object *obj_desc;

	union acpi_operand_object *operand_desc;

	struct acpi_namespace_node *node;

	union acpi_parse_object *next_op;

	ACPI_FUNCTION_TRACE_PTR(ds_eval_region_operands, op);

	/*

	 * This is where we evaluate the address and length fields of the

	 * op_region declaration

	 */

	node = op->common.node;

	/* next_op points to the op that holds the space_ID */

	next_op = op->common.value.arg;

	/* next_op points to address op */

	next_op = next_op->common.next;

	/* Evaluate/create the address and length operands */

	status = acpi_ds_create_operands(walk_state, next_op);

	if (ACPI_FAILURE(status)) {

		return_ACPI_STATUS(status);

	}

	/* Resolve the length and address operands to numbers */

	status = acpi_ex_resolve_operands(op->common.aml_opcode,

					  ACPI_WALK_OPERANDS, walk_state);

	if (ACPI_FAILURE(status)) {

		return_ACPI_STATUS(status);

	}

	obj_desc = acpi_ns_get_attached_object(node);

	if (!obj_desc) {

		return_ACPI_STATUS(AE_NOT_EXIST);

	}

	/*

	 * Get the length operand and save it

	 * (at Top of stack)

	 */

	operand_desc = walk_state->operands[walk_state->num_operands - 1];

	obj_desc->region.length = (u32) operand_desc->integer.value;

	acpi_ut_remove_reference(operand_desc);

	/*

	 * Get the address and save it

	 * (at top of stack - 1)

	 */

	operand_desc = walk_state->operands[walk_state->num_operands - 2];

	obj_desc->region.address = (acpi_physical_address)

	    operand_desc->integer.value;

	acpi_ut_remove_reference(operand_desc);

	ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n",

			  obj_desc,

			  ACPI_FORMAT_UINT64(obj_desc->region.address),

			  obj_desc->region.length));

	/* Now the address and length are valid for this opregion */

	obj_desc->region.flags |= AOPOBJ_DATA_VALID;

	return_ACPI_STATUS(status);

}

/*******************************************************************************

 *

 * FUNCTION:    acpi_ds_eval_table_region_operands

 *

 * PARAMETERS:  walk_state      - Current walk

 *              op              - A valid region Op object

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Get region address and length.

 *              Called from acpi_ds_exec_end_op during data_table_region parse

 *              tree walk.

 *

 ******************************************************************************/

acpi_status

acpi_ds_eval_table_region_operands(struct acpi_walk_state *walk_state,

				   union acpi_parse_object *op)

{

	acpi_status status;

	union acpi_operand_object *obj_desc;

	union acpi_operand_object **operand;

	struct acpi_namespace_node *node;

	union acpi_parse_object *next_op;

	struct acpi_table_header *table;

	u32 table_index;

	ACPI_FUNCTION_TRACE_PTR(ds_eval_table_region_operands, op);

	/*

	 * This is where we evaluate the Signature string, oem_id string,

	 * and oem_table_id string of the Data Table Region declaration

	 */

	node = op->common.node;

	/* next_op points to Signature string op */

	next_op = op->common.value.arg;

	/*

	 * Evaluate/create the Signature string, oem_id string,

	 * and oem_table_id string operands

	 */

	status = acpi_ds_create_operands(walk_state, next_op);

	if (ACPI_FAILURE(status)) {

		return_ACPI_STATUS(status);

	}

	operand = &walk_state->operands[0];

	/*

	 * Resolve the Signature string, oem_id string,

	 * and oem_table_id string operands

	 */

	status = acpi_ex_resolve_operands(op->common.aml_opcode,

					  ACPI_WALK_OPERANDS, walk_state);

	if (ACPI_FAILURE(status)) {

		goto cleanup;

	}

	/* Find the ACPI table */

	status = acpi_tb_find_table(operand[0]->string.pointer,

				    operand[1]->string.pointer,

				    operand[2]->string.pointer, &table_index);

	if (ACPI_FAILURE(status)) {

		if (status == AE_NOT_FOUND) {

			ACPI_ERROR((AE_INFO,

				    "ACPI Table [%4.4s] OEM:(%s, %s) not found in RSDT/XSDT",

				    operand[0]->string.pointer,

				    operand[1]->string.pointer,

				    operand[2]->string.pointer));

		}

		goto cleanup;

	}

	status = acpi_get_table_by_index(table_index, &table);

	if (ACPI_FAILURE(status)) {

		goto cleanup;

	}

	obj_desc = acpi_ns_get_attached_object(node);

	if (!obj_desc) {

		status = AE_NOT_EXIST;

		goto cleanup;

	}

	obj_desc->region.address = ACPI_PTR_TO_PHYSADDR(table);

	obj_desc->region.length = table->length;

	ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n",

			  obj_desc,

			  ACPI_FORMAT_UINT64(obj_desc->region.address),

			  obj_desc->region.length));

	/* Now the address and length are valid for this opregion */

	obj_desc->region.flags |= AOPOBJ_DATA_VALID;

cleanup:

	acpi_ut_remove_reference(operand[0]);

	acpi_ut_remove_reference(operand[1]);

	acpi_ut_remove_reference(operand[2]);

	return_ACPI_STATUS(status);

}

/*******************************************************************************

 *

 * FUNCTION:    acpi_ds_eval_data_object_operands

 *

 * PARAMETERS:  walk_state      - Current walk

 *              op              - A valid data_object Op object

 *              obj_desc        - data_object

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Get the operands and complete the following data object types:

 *              Buffer, Package.

 *

 ******************************************************************************/

acpi_status

acpi_ds_eval_data_object_operands(struct acpi_walk_state *walk_state,

				  union acpi_parse_object *op,

				  union acpi_operand_object *obj_desc)

{

	acpi_status status;

	union acpi_operand_object *arg_desc;

	u32 length;

	ACPI_FUNCTION_TRACE(ds_eval_data_object_operands);

	/* The first operand (for all of these data objects) is the length */

	/*

	 * Set proper index into operand stack for acpi_ds_obj_stack_push

	 * invoked inside acpi_ds_create_operand.

	 */

	walk_state->operand_index = walk_state->num_operands;

	status = acpi_ds_create_operand(walk_state, op->common.value.arg, 1);

	if (ACPI_FAILURE(status)) {

		return_ACPI_STATUS(status);

	}

	status = acpi_ex_resolve_operands(walk_state->opcode,

					  &(walk_state->

					    operands[walk_state->num_operands -

						     1]), walk_state);

	if (ACPI_FAILURE(status)) {

		return_ACPI_STATUS(status);

	}

	/* Extract length operand */

	arg_desc = walk_state->operands[walk_state->num_operands - 1];

	length = (u32) arg_desc->integer.value;

	/* Cleanup for length operand */

	status = acpi_ds_obj_stack_pop(1, walk_state);

	if (ACPI_FAILURE(status)) {

		return_ACPI_STATUS(status);

	}

	acpi_ut_remove_reference(arg_desc);

	/*

	 * Create the actual data object

	 */

	switch (op->common.aml_opcode) {

	case AML_BUFFER_OP:

		status =

		    acpi_ds_build_internal_buffer_obj(walk_state, op, length,

						      &obj_desc);

		break;

	case AML_PACKAGE_OP:

	case AML_VAR_PACKAGE_OP:

		status =

		    acpi_ds_build_internal_package_obj(walk_state, op, length,

						       &obj_desc);

		break;

	default:

		return_ACPI_STATUS(AE_AML_BAD_OPCODE);

	}

	if (ACPI_SUCCESS(status)) {

		/*

		 * Return the object in the walk_state, unless the parent is a package -

		 * in this case, the return object will be stored in the parse tree

		 * for the package.

		 */

		if ((!op->common.parent) ||

		    ((op->common.parent->common.aml_opcode != AML_PACKAGE_OP) &&

		     (op->common.parent->common.aml_opcode !=

		      AML_VAR_PACKAGE_OP)

		     && (op->common.parent->common.aml_opcode !=

			 AML_NAME_OP))) {

			walk_state->result_obj = obj_desc;

		}

	}

	return_ACPI_STATUS(status);

}

/*******************************************************************************

 *

 * FUNCTION:    acpi_ds_eval_bank_field_operands

 *

 * PARAMETERS:  walk_state      - Current walk

 *              op              - A valid bank_field Op object

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Get bank_field bank_value

 *              Called from acpi_ds_exec_end_op during bank_field parse tree walk

 *

 ******************************************************************************/

acpi_status

acpi_ds_eval_bank_field_operands(struct acpi_walk_state *walk_state,

				 union acpi_parse_object *op)

{

	acpi_status status;

	union acpi_operand_object *obj_desc;

	union acpi_operand_object *operand_desc;

	struct acpi_namespace_node *node;

	union acpi_parse_object *next_op;

	union acpi_parse_object *arg;

	ACPI_FUNCTION_TRACE_PTR(ds_eval_bank_field_operands, op);

	/*

	 * This is where we evaluate the bank_value field of the

	 * bank_field declaration

	 */

	/* next_op points to the op that holds the Region */

	next_op = op->common.value.arg;

	/* next_op points to the op that holds the Bank Register */

	next_op = next_op->common.next;

	/* next_op points to the op that holds the Bank Value */

	next_op = next_op->common.next;

	/*

	 * Set proper index into operand stack for acpi_ds_obj_stack_push

	 * invoked inside acpi_ds_create_operand.

	 *

	 * We use walk_state->Operands[0] to store the evaluated bank_value

	 */

	walk_state->operand_index = 0;

	status = acpi_ds_create_operand(walk_state, next_op, 0);

	if (ACPI_FAILURE(status)) {

		return_ACPI_STATUS(status);

	}

	status = acpi_ex_resolve_to_value(&walk_state->operands[0], walk_state);

	if (ACPI_FAILURE(status)) {

		return_ACPI_STATUS(status);

	}

	ACPI_DUMP_OPERANDS(ACPI_WALK_OPERANDS,

			   acpi_ps_get_opcode_name(op->common.aml_opcode), 1);

	/*

	 * Get the bank_value operand and save it

	 * (at Top of stack)

	 */

	operand_desc = walk_state->operands[0];

	/* Arg points to the start Bank Field */

	arg = acpi_ps_get_arg(op, 4);

	while (arg) {

		/* Ignore OFFSET and ACCESSAS terms here */

		if (arg->common.aml_opcode == AML_INT_NAMEDFIELD_OP) {

			node = arg->common.node;

			obj_desc = acpi_ns_get_attached_object(node);

			if (!obj_desc) {

				return_ACPI_STATUS(AE_NOT_EXIST);

			}

			obj_desc->bank_field.value =

			    (u32) operand_desc->integer.value;

		}

		/* Move to next field in the list */

		arg = arg->common.next;

	}

	acpi_ut_remove_reference(operand_desc);

	return_ACPI_STATUS(status);

}