/****************************************************************************** * * Module Name: psutils - Parser miscellaneous utilities (Parser only) * *****************************************************************************/ /* * Copyright (C) 2000 - 2005, 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_PARSER	 ACPI_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 * ******************************************************************************/ voidacpi_ps_init_op (	union acpi_parse_object         *op,	u16                             opcode){	ACPI_FUNCTION_ENTRY ();  	op->common.data_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_ut_acquire_from_cache (ACPI_MEM_LIST_PSNODE);	}	else {		/* Extended parseop */ 		op = acpi_ut_acquire_from_cache (ACPI_MEM_LIST_PSNODE_EXT);	} 	/* 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. * ******************************************************************************/ voidacpi_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) {		acpi_ut_release_to_cache (ACPI_MEM_LIST_PSNODE, op);	}	else {		acpi_ut_release_to_cache (ACPI_MEM_LIST_PSNODE_EXT, op);	}}  #ifdef ACPI_ENABLE_OBJECT_CACHE/******************************************************************************* * * FUNCTION:    acpi_ps_delete_parse_cache * * PARAMETERS:  None * * RETURN:      None * * DESCRIPTION: Free all objects that are on the parse cache list. * ******************************************************************************/ voidacpi_ps_delete_parse_cache (	void){	ACPI_FUNCTION_TRACE ("ps_delete_parse_cache");  	acpi_ut_delete_generic_cache (ACPI_MEM_LIST_PSNODE);	acpi_ut_delete_generic_cache (ACPI_MEM_LIST_PSNODE_EXT);	return_VOID;}#endif  /******************************************************************************* * * FUNCTION:    Utility functions * * DESCRIPTION: Low level character and object functions * ******************************************************************************/  /* * Is "c" a namestring lead character? */u8acpi_ps_is_leading_char (	u32                             c){	return ((u8) (c == '_' || (c >= 'A' && c <= 'Z')));}  /* * Is "c" a namestring prefix character? */u8acpi_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_USAGEu32acpi_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 */voidacpi_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;}