dsopcode.c

这个linux源代码是很全面的~基本完整了~使用c编译的~由于时间问题我没有亲自测试~但就算用来做参考资料也是非常好的

/******************************************************************************
 *
 * Module Name: dsopcode - Dispatcher Op Region support and handling of
 *                         "control" opcodes
 *              $Revision: 56 $
 *
 *****************************************************************************/

/*
 *  Copyright (C) 2000, 2001 R. Byron Moore
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */


#include "acpi.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
	 MODULE_NAME         ("dsopcode")


/*****************************************************************************
 *
 * FUNCTION:    Acpi_ds_get_buffer_field_arguments
 *
 * PARAMETERS:  Obj_desc        - A valid Buffer_field object
 *
 * RETURN:      Status.
 *
 * DESCRIPTION: Get Buffer_field Buffer and Index. This implements the late
 *              evaluation of these field attributes.
 *
 ****************************************************************************/

acpi_status
acpi_ds_get_buffer_field_arguments (
	acpi_operand_object     *obj_desc)
{
	acpi_operand_object     *extra_desc;
	acpi_namespace_node     *node;
	acpi_parse_object       *op;
	acpi_parse_object       *field_op;
	acpi_status             status;
	acpi_table_desc         *table_desc;
	acpi_walk_state         *walk_state;


	FUNCTION_TRACE_PTR ("Ds_get_buffer_field_arguments", obj_desc);


	if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
		return_ACPI_STATUS (AE_OK);
	}


	/* Get the AML pointer (method object) and Buffer_field node */

	extra_desc = obj_desc->buffer_field.extra;
	node = obj_desc->buffer_field.node;

	DEBUG_EXEC(acpi_ut_display_init_pathname (node, " [Field]"));
	ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[%4.4s] Buffer_field JIT Init\n",
		(char*)&node->name));


	/*
	 * Allocate a new parser op to be the root of the parsed
	 * Op_region tree
	 */
	op = acpi_ps_alloc_op (AML_SCOPE_OP);
	if (!op) {
		return (AE_NO_MEMORY);
	}

	/* Save the Node for use in Acpi_ps_parse_aml */

	op->node = acpi_ns_get_parent_object (node);

	/* Get a handle to the parent ACPI table */

	status = acpi_tb_handle_to_object (node->owner_id, &table_desc);
	if (ACPI_FAILURE (status)) {
		return_ACPI_STATUS (status);
	}

	/* Create and initialize a new parser state */

	walk_state = acpi_ds_create_walk_state (TABLE_ID_DSDT,
			   NULL, NULL, NULL);
	if (!walk_state) {
		return_ACPI_STATUS (AE_NO_MEMORY);
	}

	status = acpi_ds_init_aml_walk (walk_state, op, NULL, extra_desc->extra.aml_start,
			  extra_desc->extra.aml_length, NULL, NULL, 1);
	if (ACPI_FAILURE (status)) {
		/* TBD: delete walk state */
		return_ACPI_STATUS (status);
	}

	/* TBD: No Walk flags?? */

	walk_state->parse_flags = 0;

	/* Pass1: Parse the entire Buffer_field declaration */

	status = acpi_ps_parse_aml (walk_state);
	if (ACPI_FAILURE (status)) {
		acpi_ps_delete_parse_tree (op);
		return_ACPI_STATUS (status);
	}

	/* Get and init the actual Field_unit Op created above */

	field_op = op->value.arg;
	op->node = node;


	field_op = op->value.arg;
	field_op->node = node;
	acpi_ps_delete_parse_tree (op);

	/* Evaluate the address and length arguments for the Op_region */

	op = acpi_ps_alloc_op (AML_SCOPE_OP);
	if (!op) {
		return (AE_NO_MEMORY);
	}

	op->node = acpi_ns_get_parent_object (node);

	/* Create and initialize a new parser state */

	walk_state = acpi_ds_create_walk_state (TABLE_ID_DSDT,
			   NULL, NULL, NULL);
	if (!walk_state) {
		return_ACPI_STATUS (AE_NO_MEMORY);
	}

	status = acpi_ds_init_aml_walk (walk_state, op, NULL, extra_desc->extra.aml_start,
			  extra_desc->extra.aml_length, NULL, NULL, 3);
	if (ACPI_FAILURE (status)) {
		/* TBD: delete walk state */
		return_ACPI_STATUS (status);
	}

	status = acpi_ps_parse_aml (walk_state);
	acpi_ps_delete_parse_tree (op);

	/*
	 * The pseudo-method object is no longer needed since the region is
	 * now initialized
	 */
	acpi_ut_remove_reference (obj_desc->buffer_field.extra);
	obj_desc->buffer_field.extra = NULL;

	return_ACPI_STATUS (status);
}


/*****************************************************************************
 *
 * FUNCTION:    Acpi_ds_get_region_arguments
 *
 * PARAMETERS:  Obj_desc        - A valid region object
 *
 * RETURN:      Status.
 *
 * DESCRIPTION: Get region address and length.  This implements the late
 *              evaluation of these region attributes.
 *
 ****************************************************************************/

acpi_status
acpi_ds_get_region_arguments (
	acpi_operand_object     *obj_desc)
{
	acpi_operand_object     *extra_desc = NULL;
	acpi_namespace_node     *node;
	acpi_parse_object       *op;
	acpi_parse_object       *region_op;
	acpi_status             status;
	acpi_table_desc         *table_desc;
	acpi_walk_state         *walk_state;


	FUNCTION_TRACE_PTR ("Ds_get_region_arguments", obj_desc);


	if (obj_desc->region.flags & AOPOBJ_DATA_VALID) {
		return_ACPI_STATUS (AE_OK);
	}


	/* Get the AML pointer (method object) and region node */

	extra_desc = obj_desc->region.extra;
	node = obj_desc->region.node;

	DEBUG_EXEC(acpi_ut_display_init_pathname (node, " [Operation Region]"));

	ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[%4.4s] Op_region Init at AML %p\n",
		(char*)&node->name, extra_desc->extra.aml_start));

	/*
	 * Allocate a new parser op to be the root of the parsed
	 * Op_region tree
	 */
	op = acpi_ps_alloc_op (AML_SCOPE_OP);
	if (!op) {
		return (AE_NO_MEMORY);
	}

	/* Save the Node for use in Acpi_ps_parse_aml */

	op->node = acpi_ns_get_parent_object (node);

	/* Get a handle to the parent ACPI table */

	status = acpi_tb_handle_to_object (node->owner_id, &table_desc);
	if (ACPI_FAILURE (status)) {
		return_ACPI_STATUS (status);
	}

	/* Create and initialize a new parser state */

	walk_state = acpi_ds_create_walk_state (TABLE_ID_DSDT,
			   op, NULL, NULL);
	if (!walk_state) {
		return_ACPI_STATUS (AE_NO_MEMORY);
	}

	status = acpi_ds_init_aml_walk (walk_state, op, NULL, extra_desc->extra.aml_start,
			  extra_desc->extra.aml_length, NULL, NULL, 1);
	if (ACPI_FAILURE (status)) {
		/* TBD: delete walk state */
		return_ACPI_STATUS (status);
	}

	/* TBD: No Walk flags?? */

	walk_state->parse_flags = 0;

	/* Parse the entire Op_region declaration, creating a parse tree */

	status = acpi_ps_parse_aml (walk_state);
	if (ACPI_FAILURE (status)) {
		acpi_ps_delete_parse_tree (op);
		return_ACPI_STATUS (status);
	}

	/* Get and init the actual Region_op created above */

	region_op = op->value.arg;
	op->node = node;


	region_op = op->value.arg;
	region_op->node = node;
	acpi_ps_delete_parse_tree (op);

	/* Evaluate the address and length arguments for the Op_region */

	op = acpi_ps_alloc_op (AML_SCOPE_OP);
	if (!op) {
		return (AE_NO_MEMORY);
	}

	op->node = acpi_ns_get_parent_object (node);

	/* Create and initialize a new parser state */

	walk_state = acpi_ds_create_walk_state (TABLE_ID_DSDT,
			   op, NULL, NULL);
	if (!walk_state) {
		return_ACPI_STATUS (AE_NO_MEMORY);
	}

	status = acpi_ds_init_aml_walk (walk_state, op, NULL, extra_desc->extra.aml_start,
			  extra_desc->extra.aml_length, NULL, NULL, 3);
	if (ACPI_FAILURE (status)) {
		/* TBD: delete walk state */
		return_ACPI_STATUS (status);
	}

	status = acpi_ps_parse_aml (walk_state);
	acpi_ps_delete_parse_tree (op);

	return_ACPI_STATUS (status);
}


/*****************************************************************************
 *
 * FUNCTION:    Acpi_ds_initialize_region
 *
 * PARAMETERS:  Op              - A valid region Op object
 *
 * RETURN:      Status
 *
 * DESCRIPTION:
 *
 ****************************************************************************/

acpi_status
acpi_ds_initialize_region (
	acpi_handle             obj_handle)
{
	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_eval_buffer_field_operands
 *
 * PARAMETERS:  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 SPECIFICATION REFERENCES:
 *  Each of the Buffer Field opcodes is defined as specified in in-line
 *  comments below. For each one, use the following definitions.
 *
 *  Def_bit_field   :=  Bit_field_op    Src_buf Bit_idx Destination
 *  Def_byte_field  :=  Byte_field_op   Src_buf Byte_idx Destination
 *  Def_create_field := Create_field_op Src_buf Bit_idx Num_bits Name_string
 *  Def_dWord_field :=  DWord_field_op  Src_buf Byte_idx Destination
 *  Def_word_field  :=  Word_field_op   Src_buf Byte_idx Destination
 *  Bit_index       :=  Term_arg=>Integer
 *  Byte_index      :=  Term_arg=>Integer
 *  Destination     :=  Name_string
 *  Num_bits        :=  Term_arg=>Integer
 *  Source_buf      :=  Term_arg=>Buffer
 *
 ****************************************************************************/

acpi_status
acpi_ds_eval_buffer_field_operands (
	acpi_walk_state         *walk_state,
	acpi_parse_object       *op)
{
	acpi_status             status;
	acpi_operand_object     *obj_desc;
	acpi_namespace_node     *node;
	acpi_parse_object       *next_op;
	u32                     offset;
	u32                     bit_offset;
	u32                     bit_count;
	u8                      field_flags;
	acpi_operand_object     *res_desc = NULL;
	acpi_operand_object     *cnt_desc = NULL;
	acpi_operand_object     *off_desc = NULL;
	acpi_operand_object     *src_desc = NULL;


	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->node;

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

	next_op = op->value.arg;

	/* Acpi_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->opcode, WALK_OPERANDS, walk_state);
	DUMP_OPERANDS (WALK_OPERANDS, IMODE_EXECUTE, acpi_ps_get_opcode_name (op->opcode),
			  walk_state->num_operands, "after Acpi_ex_resolve_operands");

	if (ACPI_FAILURE (status)) {
		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "(%s) bad operand(s) (%X)\n",
			acpi_ps_get_opcode_name (op->opcode), status));

		goto cleanup;
	}

	/* Get the operands */

	if (AML_CREATE_FIELD_OP == op->opcode) {
		res_desc = walk_state->operands[3];
		cnt_desc = walk_state->operands[2];
	}
	else {
		res_desc = walk_state->operands[2];
	}

	off_desc = walk_state->operands[1];
	src_desc = walk_state->operands[0];


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

	/*
	 * If Res_desc is a Name, it will be a direct name pointer after
	 * Acpi_ex_resolve_operands()
	 */
	if (!VALID_DESCRIPTOR_TYPE (res_desc, ACPI_DESC_TYPE_NAMED)) {
		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "(%s) destination must be a Node\n",
			acpi_ps_get_opcode_name (op->opcode)));

		status = AE_AML_OPERAND_TYPE;
		goto cleanup;
	}

	/*
	 * Setup the Bit offsets and counts, according to the opcode
	 */
	switch (op->opcode) {

	/* Def_create_field */

	case AML_CREATE_FIELD_OP:

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

		bit_offset  = offset;
		bit_count   = (u32) cnt_desc->integer.value;
		field_flags = ACCESS_BYTE_ACC;
		break;


	/* Def_create_bit_field */

	case AML_CREATE_BIT_FIELD_OP:

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

		bit_offset  = offset;
		bit_count   = 1;
		field_flags = ACCESS_BYTE_ACC;
		break;


	/* Def_create_byte_field */

	case AML_CREATE_BYTE_FIELD_OP:

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

		bit_offset  = 8 * offset;
		bit_count   = 8;
		field_flags = ACCESS_BYTE_ACC;
		break;


	/* Def_create_word_field */

	case AML_CREATE_WORD_FIELD_OP:

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

		bit_offset  = 8 * offset;
		bit_count   = 16;
		field_flags = ACCESS_WORD_ACC;
		break;


	/* Def_create_dWord_field */

	case AML_CREATE_DWORD_FIELD_OP:

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

		bit_offset  = 8 * offset;