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/******************************************************************************

 *

 * Module Name: utalloc - local memory allocation routines

 *

 *****************************************************************************/

/*

 * Copyright (C) 2000 - 2015, 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 "acdebug.h"

#define _COMPONENT          ACPI_UTILITIES

ACPI_MODULE_NAME("utalloc")

#if !defined (USE_NATIVE_ALLOCATE_ZEROED)

/*******************************************************************************

 *

 * FUNCTION:    acpi_os_allocate_zeroed

 *

 * PARAMETERS:  size                - Size of the allocation

 *

 * RETURN:      Address of the allocated memory on success, NULL on failure.

 *

 * DESCRIPTION: Subsystem equivalent of calloc. Allocate and zero memory.

 *              This is the default implementation. Can be overridden via the

 *              USE_NATIVE_ALLOCATE_ZEROED flag.

 *

 ******************************************************************************/

void *acpi_os_allocate_zeroed(acpi_size size)

{

	void *allocation;

	ACPI_FUNCTION_ENTRY();

	allocation = acpi_os_allocate(size);

	if (allocation) {

		/* Clear the memory block */

		memset(allocation, 0, size);

	}

	return (allocation);

}

#endif				/* !USE_NATIVE_ALLOCATE_ZEROED */

/*******************************************************************************

 *

 * 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) {

		strcpy(buffer, "MEMORY");

		(void)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_os_free(acpi_gbl_global_list);

	acpi_gbl_global_list = NULL;

	acpi_os_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_status

acpi_ut_initialize_buffer(struct acpi_buffer * buffer,

			  acpi_size required_length)

{

	acpi_size input_buffer_length;

	/* Parameter validation */

	if (!buffer || !required_length) {

		return (AE_BAD_PARAMETER);

	}

	/*

	 * Buffer->Length is used as both an input and output parameter. Get the

	 * input actual length and set the output required buffer length.

	 */

	input_buffer_length = buffer->length;

	buffer->length = required_length;

	/*

	 * The input buffer length contains the actual buffer length, or the type

	 * of buffer to be allocated by this routine.

	 */

	switch (input_buffer_length) {

	case ACPI_NO_BUFFER:

		/* Return the exception (and the required buffer length) */

		return (AE_BUFFER_OVERFLOW);

	case ACPI_ALLOCATE_BUFFER:

		/*

		 * Allocate a new buffer. We directectly call acpi_os_allocate here to

		 * purposefully bypass the (optionally enabled) internal allocation

		 * tracking mechanism since we only want to track internal

		 * allocations. Note: The caller should use acpi_os_free to free this

		 * buffer created via ACPI_ALLOCATE_BUFFER.

		 */

		buffer->pointer = acpi_os_allocate(required_length);

		break;

	case ACPI_ALLOCATE_LOCAL_BUFFER:

		/* Allocate a new buffer with local interface to allow tracking */

		buffer->pointer = ACPI_ALLOCATE(required_length);

		break;

	default:

		/* Existing buffer: Validate the size of the buffer */

		if (input_buffer_length < required_length) {

			return (AE_BUFFER_OVERFLOW);

		}

		break;

	}

	/* Validate allocation from above or input buffer pointer */

	if (!buffer->pointer) {

		return (AE_NO_MEMORY);

	}

	/* Have a valid buffer, clear it */

	memset(buffer->pointer, 0, required_length);

	return (AE_OK);

}