/****************************************************************************** * * Module Name: psutils - Parser miscellaneous utilities (Parser only) * *****************************************************************************/ /* * Copyright (C) 2000 - 2004, 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 #include #include #include #define _COMPONENT ACPI_PARSER ACPI_MODULE_NAME ("psutils") /******************************************************************************* * * FUNCTION: acpi_ps_create_scope_op * * PARAMETERS: None * * RETURN: scope_op * * 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: Status * * DESCRIPTION: Allocate an acpi_op, choose op type (and thus size) based on * opcode * ******************************************************************************/ void acpi_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. * * 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 = NULL; u32 size; u8 flags; const struct acpi_opcode_info *op_info; ACPI_FUNCTION_ENTRY (); op_info = acpi_ps_get_opcode_info (opcode); /* Allocate the minimum required size object */ if (op_info->flags & AML_DEFER) { size = sizeof (struct acpi_parse_obj_named); flags = ACPI_PARSEOP_DEFERRED; } else if (op_info->flags & AML_NAMED) { size = sizeof (struct acpi_parse_obj_named); flags = ACPI_PARSEOP_NAMED; } else if (opcode == AML_INT_BYTELIST_OP) { size = sizeof (struct acpi_parse_obj_named); flags = ACPI_PARSEOP_BYTELIST; } else { size = sizeof (struct acpi_parse_obj_common); flags = ACPI_PARSEOP_GENERIC; } if (size == sizeof (struct acpi_parse_obj_common)) { /* * The generic op is by far the most common (16 to 1) */ op = acpi_ut_acquire_from_cache (ACPI_MEM_LIST_PSNODE); } else { 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. * ******************************************************************************/ 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) { acpi_ut_release_to_cache (ACPI_MEM_LIST_PSNODE, op); } else { acpi_ut_release_to_cache (ACPI_MEM_LIST_PSNODE_EXT, op); } } /******************************************************************************* * * FUNCTION: acpi_ps_delete_parse_cache * * PARAMETERS: None * * RETURN: None * * DESCRIPTION: Free all objects that are on the parse cache list. * ******************************************************************************/ void acpi_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; } /******************************************************************************* * * 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 */ 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; }