/****************************************************************************** * * Module Name: psutils - Parser miscellaneous utilities (Parser only) * *****************************************************************************/ /* * Copyright (C) 2000 - 2017, 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 "acconvert.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(u8 *aml) { union acpi_parse_object *scope_op; scope_op = acpi_ps_alloc_op(AML_SCOPE_OP, aml); 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(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 * aml - Address of the opcode * * 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, u8 *aml) { 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_OBJECT; } 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.aml = aml; op->common.flags = flags; ASL_CV_CLEAR_OP_COMMENTS(op); if (opcode == AML_SCOPE_OP) { acpi_gbl_current_scope = op; } if (gbl_capture_comments) { ASL_CV_TRANSFER_COMMENTS(op); } } 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); ASL_CV_CLEAR_OP_COMMENTS(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'))); } /* * Get op's name (4-byte name segment) or 0 if unnamed */ u32 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); } /* * 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; }