linux/drivers/acpi/acpica/utaddress.c

// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/******************************************************************************
 *
 * Module Name: utaddress - op_region address range check
 *
 * Copyright (C) 2000 - 2023, Intel Corp.
 *
 *****************************************************************************/

#include <acpi/acpi.h>
#include "accommon.h"
#include "acnamesp.h"

#define _COMPONENT …
ACPI_MODULE_NAME("utaddress")

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_add_address_range
 *
 * PARAMETERS:  space_id            - Address space ID
 *              address             - op_region start address
 *              length              - op_region length
 *              region_node         - op_region namespace node
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Add the Operation Region address range to the global list.
 *              The only supported Space IDs are Memory and I/O. Called when
 *              the op_region address/length operands are fully evaluated.
 *
 * MUTEX:       Locks the namespace
 *
 * NOTE: Because this interface is only called when an op_region argument
 * list is evaluated, there cannot be any duplicate region_nodes.
 * Duplicate Address/Length values are allowed, however, so that multiple
 * address conflicts can be detected.
 *
 ******************************************************************************/
acpi_status
acpi_ut_add_address_range(acpi_adr_space_type space_id,
			  acpi_physical_address address,
			  u32 length, struct acpi_namespace_node *region_node)
{ … }

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_remove_address_range
 *
 * PARAMETERS:  space_id            - Address space ID
 *              region_node         - op_region namespace node
 *
 * RETURN:      None
 *
 * DESCRIPTION: Remove the Operation Region from the global list. The only
 *              supported Space IDs are Memory and I/O. Called when an
 *              op_region is deleted.
 *
 * MUTEX:       Assumes the namespace is locked
 *
 ******************************************************************************/

void
acpi_ut_remove_address_range(acpi_adr_space_type space_id,
			     struct acpi_namespace_node *region_node)
{ … }

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_check_address_range
 *
 * PARAMETERS:  space_id            - Address space ID
 *              address             - Start address
 *              length              - Length of address range
 *              warn                - TRUE if warning on overlap desired
 *
 * RETURN:      Count of the number of conflicts detected. Zero is always
 *              returned for Space IDs other than Memory or I/O.
 *
 * DESCRIPTION: Check if the input address range overlaps any of the
 *              ASL operation region address ranges. The only supported
 *              Space IDs are Memory and I/O.
 *
 * MUTEX:       Assumes the namespace is locked.
 *
 ******************************************************************************/

u32
acpi_ut_check_address_range(acpi_adr_space_type space_id,
			    acpi_physical_address address, u32 length, u8 warn)
{ … }

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_delete_address_lists
 *
 * PARAMETERS:  None
 *
 * RETURN:      None
 *
 * DESCRIPTION: Delete all global address range lists (called during
 *              subsystem shutdown).
 *
 ******************************************************************************/

void acpi_ut_delete_address_lists(void)
{ … }