// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/******************************************************************************
*
* Module Name: utaddress - op_region address range check
*
* Copyright (C) 2000 - 2025, Intel Corp.
*
*****************************************************************************/
#include <acpi/acpi.h>
#include "accommon.h"
#include "acnamesp.h"
#define _COMPONENT ACPI_UTILITIES
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)
{
struct acpi_address_range *range_info;
ACPI_FUNCTION_TRACE(ut_add_address_range);
if ((space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
(space_id != ACPI_ADR_SPACE_SYSTEM_IO)) {
return_ACPI_STATUS(AE_OK);
}
/* Allocate/init a new info block, add it to the appropriate list */
range_info = ACPI_ALLOCATE(
sizeof(
struct acpi_address_range));
if (!range_info) {
return_ACPI_STATUS(AE_NO_MEMORY);
}
range_info->start_address = address;
range_info->end_address = (address + length - 1);
range_info->region_node = region_node;
range_info->next = acpi_gbl_address_range_list[space_id];
acpi_gbl_address_range_list[space_id] = range_info;
ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
"\nAdded [%4.4s] address range: 0x%8.8X%8.8X-0x%8.8X%8.8X\n",
acpi_ut_get_node_name(range_info->region_node),
ACPI_FORMAT_UINT64(address),
ACPI_FORMAT_UINT64(range_info->end_address)));
return_ACPI_STATUS(AE_OK);
}
/*******************************************************************************
*
* 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)
{
struct acpi_address_range *range_info;
struct acpi_address_range *prev;
ACPI_FUNCTION_TRACE(ut_remove_address_range);
if ((space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
(space_id != ACPI_ADR_SPACE_SYSTEM_IO)) {
return_VOID;
}
/* Get the appropriate list head and check the list */
range_info = prev = acpi_gbl_address_range_list[space_id];
while (range_info) {
if (range_info->region_node == region_node) {
if (range_info == prev) {
/* Found at list head */
acpi_gbl_address_range_list[space_id] =
range_info->next;
}
else {
prev->next = range_info->next;
}
ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
"\nRemoved [%4.4s] address range: 0x%8.8X%8.8X-0x%8.8X%8.8X\n",
acpi_ut_get_node_name(range_info->
region_node),
ACPI_FORMAT_UINT64(range_info->
start_address),
ACPI_FORMAT_UINT64(range_info->
end_address)));
ACPI_FREE(range_info);
return_VOID;
}
prev = range_info;
range_info = range_info->next;
}
return_VOID;
}
/*******************************************************************************
*
* 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)
{
struct acpi_address_range *range_info;
acpi_physical_address end_address;
char *pathname;
u32 overlap_count = 0;
ACPI_FUNCTION_TRACE(ut_check_address_range);
if ((space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
(space_id != ACPI_ADR_SPACE_SYSTEM_IO)) {
return_UINT32(0);
}
range_info = acpi_gbl_address_range_list[space_id];
end_address = address + length - 1;
/* Check entire list for all possible conflicts */
while (range_info) {
/*
* Check if the requested address/length overlaps this
* address range. There are four cases to consider:
*
* 1) Input address/length is contained completely in the
* address range
* 2) Input address/length overlaps range at the range start
* 3) Input address/length overlaps range at the range end
* 4) Input address/length completely encompasses the range
*/
if ((address <= range_info->end_address) &&
(end_address >= range_info->start_address)) {
/* Found an address range overlap */
overlap_count++;
if (warn) {
/* Optional warning message */
pathname =
acpi_ns_get_normalized_pathname(range_info->
region_node,
TRUE);
ACPI_WARNING((AE_INFO,
"%s range 0x%8.8X%8.8X-0x%8.8X%8.8X conflicts with OpRegion 0x%8.8X%8.8X-0x%8.8X%8.8X (%s)",
acpi_ut_get_region_name(space_id),
ACPI_FORMAT_UINT64(address),
ACPI_FORMAT_UINT64(end_address),
ACPI_FORMAT_UINT64(range_info->
start_address),
ACPI_FORMAT_UINT64(range_info->
end_address),
pathname));
ACPI_FREE(pathname);
}
}
range_info = range_info->next;
}
return_UINT32(overlap_count);
}
/*******************************************************************************
*
* 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)
{
struct acpi_address_range *next;
struct acpi_address_range *range_info;
int i;
/* Delete all elements in all address range lists */
for (i = 0; i < ACPI_ADDRESS_RANGE_MAX; i++) {
next = acpi_gbl_address_range_list[i];
while (next) {
range_info = next;
next = range_info->next;
ACPI_FREE(range_info);
}
acpi_gbl_address_range_list[i] = NULL;
}
}
