/****************************************************************************** * * Module Name: utalloc - local memory allocation routines * *****************************************************************************/ /* * 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/acdebug.h> #define _COMPONENT          ACPI_UTILITIESACPI_MODULE_NAME("utalloc") /******************************************************************************* * * FUNCTION:    acpi_ut_create_caches * * PARAMETERS:  None * * RETURN:      Status * * DESCRIPTION: Create all local caches * ******************************************************************************/acpi_status acpi_ut_create_caches(void){	acpi_status status; 	/* Object Caches, for frequently used objects */ 	status =	    acpi_os_create_cache("Acpi-Namespace",				 sizeof(struct acpi_namespace_node),				 ACPI_MAX_NAMESPACE_CACHE_DEPTH,				 &acpi_gbl_namespace_cache);	if (ACPI_FAILURE(status)) {		return (status);	} 	status =	    acpi_os_create_cache("Acpi-State", sizeof(union acpi_generic_state),				 ACPI_MAX_STATE_CACHE_DEPTH,				 &acpi_gbl_state_cache);	if (ACPI_FAILURE(status)) {		return (status);	} 	status =	    acpi_os_create_cache("Acpi-Parse",				 sizeof(struct acpi_parse_obj_common),				 ACPI_MAX_PARSE_CACHE_DEPTH,				 &acpi_gbl_ps_node_cache);	if (ACPI_FAILURE(status)) {		return (status);	} 	status =	    acpi_os_create_cache("Acpi-ParseExt",				 sizeof(struct acpi_parse_obj_named),				 ACPI_MAX_EXTPARSE_CACHE_DEPTH,				 &acpi_gbl_ps_node_ext_cache);	if (ACPI_FAILURE(status)) {		return (status);	} 	status =	    acpi_os_create_cache("Acpi-Operand",				 sizeof(union acpi_operand_object),				 ACPI_MAX_OBJECT_CACHE_DEPTH,				 &acpi_gbl_operand_cache);	if (ACPI_FAILURE(status)) {		return (status);	} #ifdef ACPI_DBG_TRACK_ALLOCATIONS 	/* Memory allocation lists */ 	status = acpi_ut_create_list("Acpi-Global", 0, &acpi_gbl_global_list);	if (ACPI_FAILURE(status)) {		return (status);	} 	status =	    acpi_ut_create_list("Acpi-Namespace",				sizeof(struct acpi_namespace_node),				&acpi_gbl_ns_node_list);	if (ACPI_FAILURE(status)) {		return (status);	}#endif 	return (AE_OK);} /******************************************************************************* * * FUNCTION:    acpi_ut_delete_caches * * PARAMETERS:  None * * RETURN:      Status * * DESCRIPTION: Purge and delete all local caches * ******************************************************************************/ acpi_status acpi_ut_delete_caches(void){#ifdef ACPI_DBG_TRACK_ALLOCATIONS	char buffer[7]; 	if (acpi_gbl_display_final_mem_stats) {		ACPI_STRCPY(buffer, "MEMORY");		acpi_db_display_statistics(buffer);	}#endif 	(void)acpi_os_delete_cache(acpi_gbl_namespace_cache);	acpi_gbl_namespace_cache = NULL; 	(void)acpi_os_delete_cache(acpi_gbl_state_cache);	acpi_gbl_state_cache = NULL; 	(void)acpi_os_delete_cache(acpi_gbl_operand_cache);	acpi_gbl_operand_cache = NULL; 	(void)acpi_os_delete_cache(acpi_gbl_ps_node_cache);	acpi_gbl_ps_node_cache = NULL; 	(void)acpi_os_delete_cache(acpi_gbl_ps_node_ext_cache);	acpi_gbl_ps_node_ext_cache = NULL; #ifdef ACPI_DBG_TRACK_ALLOCATIONS 	/* Debug only - display leftover memory allocation, if any */ 	acpi_ut_dump_allocations(ACPI_UINT32_MAX, NULL); 	/* Free memory lists */ 	ACPI_FREE(acpi_gbl_global_list);	acpi_gbl_global_list = NULL; 	ACPI_FREE(acpi_gbl_ns_node_list);	acpi_gbl_ns_node_list = NULL;#endif 	return (AE_OK);} /******************************************************************************* * * FUNCTION:    acpi_ut_validate_buffer * * PARAMETERS:  Buffer              - Buffer descriptor to be validated * * RETURN:      Status * * DESCRIPTION: Perform parameter validation checks on an struct acpi_buffer * ******************************************************************************/ acpi_status acpi_ut_validate_buffer(struct acpi_buffer * buffer){ 	/* Obviously, the structure pointer must be valid */ 	if (!buffer) {		return (AE_BAD_PARAMETER);	} 	/* Special semantics for the length */ 	if ((buffer->length == ACPI_NO_BUFFER) ||	    (buffer->length == ACPI_ALLOCATE_BUFFER) ||	    (buffer->length == ACPI_ALLOCATE_LOCAL_BUFFER)) {		return (AE_OK);	} 	/* Length is valid, the buffer pointer must be also */ 	if (!buffer->pointer) {		return (AE_BAD_PARAMETER);	} 	return (AE_OK);} /******************************************************************************* * * FUNCTION:    acpi_ut_initialize_buffer * * PARAMETERS:  Buffer              - Buffer to be validated *              required_length     - Length needed * * RETURN:      Status * * DESCRIPTION: Validate that the buffer is of the required length or *              allocate a new buffer.  Returned buffer is always zeroed. * ******************************************************************************/ acpi_statusacpi_ut_initialize_buffer(struct acpi_buffer * buffer,			  acpi_size required_length){	acpi_status status = AE_OK; 	switch (buffer->length) {	case ACPI_NO_BUFFER: 		/* Set the exception and returned the required length */ 		status = AE_BUFFER_OVERFLOW;		break; 	case ACPI_ALLOCATE_BUFFER: 		/* Allocate a new buffer */ 		buffer->pointer = acpi_os_allocate(required_length);		if (!buffer->pointer) {			return (AE_NO_MEMORY);		} 		/* Clear the buffer */ 		ACPI_MEMSET(buffer->pointer, 0, required_length);		break; 	case ACPI_ALLOCATE_LOCAL_BUFFER: 		/* Allocate a new buffer with local interface to allow tracking */ 		buffer->pointer = ACPI_ALLOCATE_ZEROED(required_length);		if (!buffer->pointer) {			return (AE_NO_MEMORY);		}		break; 	default: 		/* Existing buffer: Validate the size of the buffer */ 		if (buffer->length < required_length) {			status = AE_BUFFER_OVERFLOW;			break;		} 		/* Clear the buffer */ 		ACPI_MEMSET(buffer->pointer, 0, required_length);		break;	} 	buffer->length = required_length;	return (status);} #ifdef NOT_USED_BY_LINUX/******************************************************************************* * * FUNCTION:    acpi_ut_allocate * * PARAMETERS:  Size                - Size of the allocation *              Component           - Component type of caller *              Module              - Source file name of caller *              Line                - Line number of caller * * RETURN:      Address of the allocated memory on success, NULL on failure. * * DESCRIPTION: Subsystem equivalent of malloc. * ******************************************************************************/ void *acpi_ut_allocate(acpi_size size, u32 component, char *module, u32 line){	void *allocation; 	ACPI_FUNCTION_TRACE_U32(ut_allocate, size); 	/* Check for an inadvertent size of zero bytes */ 	if (!size) {		ACPI_WARNING((module, line,			      "Attempt to allocate zero bytes, allocating 1 byte"));		size = 1;	} 	allocation = acpi_os_allocate(size);	if (!allocation) { 		/* Report allocation error */ 		ACPI_WARNING((module, line,			      "Could not allocate size %X", (u32) size)); 		return_PTR(NULL);	} 	return_PTR(allocation);} /******************************************************************************* * * FUNCTION:    acpi_ut_allocate_zeroed * * PARAMETERS:  Size                - Size of the allocation *              Component           - Component type of caller *              Module              - Source file name of caller *              Line                - Line number of caller * * RETURN:      Address of the allocated memory on success, NULL on failure. * * DESCRIPTION: Subsystem equivalent of calloc. Allocate and zero memory. * ******************************************************************************/ void *acpi_ut_allocate_zeroed(acpi_size size,			      u32 component, char *module, u32 line){	void *allocation; 	ACPI_FUNCTION_ENTRY(); 	allocation = acpi_ut_allocate(size, component, module, line);	if (allocation) { 		/* Clear the memory block */ 		ACPI_MEMSET(allocation, 0, size);	} 	return (allocation);}#endif