/****************************************************************************** * * Module Name: psutils - Parser miscellaneous utilities (Parser only) * *****************************************************************************/ /* * Copyright (C) 2000 - 2007, 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/amlcode.h> #define _COMPONENT          ACPI_PARSERACPI_MODULE_NAME("psutils") /******************************************************************************* * * FUNCTION:    acpi_ps_create_scope_op * * PARAMETERS:  None * * RETURN:      A new Scope object, null on failure * * DESCRIPTION: Create a Scope and associated namepath op with the root name * ******************************************************************************/union acpi_parse_object *acpi_ps_create_scope_op(void){	union acpi_parse_object *scope_op; 	scope_op = acpi_ps_alloc_op(AML_SCOPE_OP);	if (!scope_op) {		return (NULL);	} 	scope_op->named.name = ACPI_ROOT_NAME;	return (scope_op);} /******************************************************************************* * * FUNCTION:    acpi_ps_init_op * * PARAMETERS:  Op              - A newly allocated Op object *              Opcode          - Opcode to store in the Op * * RETURN:      None * * DESCRIPTION: Initialize a parse (Op) object * ******************************************************************************/ void acpi_ps_init_op(union acpi_parse_object *op, u16 opcode){	ACPI_FUNCTION_ENTRY(); 	op->common.descriptor_type = ACPI_DESC_TYPE_PARSER;	op->common.aml_opcode = opcode; 	ACPI_DISASM_ONLY_MEMBERS(ACPI_STRNCPY(op->common.aml_op_name,					      (acpi_ps_get_opcode_info					       (opcode))->name,					      sizeof(op->common.aml_op_name)));} /******************************************************************************* * * FUNCTION:    acpi_ps_alloc_op * * PARAMETERS:  Opcode          - Opcode that will be stored in the new Op * * RETURN:      Pointer to the new Op, null on failure * * DESCRIPTION: Allocate an acpi_op, choose op type (and thus size) based on *              opcode.  A cache of opcodes is available for the pure *              GENERIC_OP, since this is by far the most commonly used. * ******************************************************************************/ union acpi_parse_object *acpi_ps_alloc_op(u16 opcode){	union acpi_parse_object *op;	const struct acpi_opcode_info *op_info;	u8 flags = ACPI_PARSEOP_GENERIC; 	ACPI_FUNCTION_ENTRY(); 	op_info = acpi_ps_get_opcode_info(opcode); 	/* Determine type of parse_op required */ 	if (op_info->flags & AML_DEFER) {		flags = ACPI_PARSEOP_DEFERRED;	} else if (op_info->flags & AML_NAMED) {		flags = ACPI_PARSEOP_NAMED;	} else if (opcode == AML_INT_BYTELIST_OP) {		flags = ACPI_PARSEOP_BYTELIST;	} 	/* Allocate the minimum required size object */ 	if (flags == ACPI_PARSEOP_GENERIC) { 		/* The generic op (default) is by far the most common (16 to 1) */ 		op = acpi_os_acquire_object(acpi_gbl_ps_node_cache);	} else {		/* Extended parseop */ 		op = acpi_os_acquire_object(acpi_gbl_ps_node_ext_cache);	} 	/* Initialize the Op */ 	if (op) {		acpi_ps_init_op(op, opcode);		op->common.flags = flags;	} 	return (op);} /******************************************************************************* * * FUNCTION:    acpi_ps_free_op * * PARAMETERS:  Op              - Op to be freed * * RETURN:      None. * * DESCRIPTION: Free an Op object.  Either put it on the GENERIC_OP cache list *              or actually free it. * ******************************************************************************/ void acpi_ps_free_op(union acpi_parse_object *op){	ACPI_FUNCTION_NAME(ps_free_op); 	if (op->common.aml_opcode == AML_INT_RETURN_VALUE_OP) {		ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "Free retval op: %p\n",				  op));	} 	if (op->common.flags & ACPI_PARSEOP_GENERIC) {		(void)acpi_os_release_object(acpi_gbl_ps_node_cache, op);	} else {		(void)acpi_os_release_object(acpi_gbl_ps_node_ext_cache, op);	}} /******************************************************************************* * * FUNCTION:    Utility functions * * DESCRIPTION: Low level character and object functions * ******************************************************************************/ /* * Is "c" a namestring lead character? */u8 acpi_ps_is_leading_char(u32 c){	return ((u8) (c == '_' || (c >= 'A' && c <= 'Z')));} /* * Is "c" a namestring prefix character? */u8 acpi_ps_is_prefix_char(u32 c){	return ((u8) (c == '\\' || c == '^'));} /* * Get op's name (4-byte name segment) or 0 if unnamed */#ifdef ACPI_FUTURE_USAGEu32 acpi_ps_get_name(union acpi_parse_object * op){ 	/* The "generic" object has no name associated with it */ 	if (op->common.flags & ACPI_PARSEOP_GENERIC) {		return (0);	} 	/* Only the "Extended" parse objects have a name */ 	return (op->named.name);}#endif				/*  ACPI_FUTURE_USAGE  */ /* * Set op's name */void acpi_ps_set_name(union acpi_parse_object *op, u32 name){ 	/* The "generic" object has no name associated with it */ 	if (op->common.flags & ACPI_PARSEOP_GENERIC) {		return;	} 	op->named.name = name;}