/******************************************************************************
*
* Module Name: utaddress - op_region address range check
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2012, 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 <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_status status;
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;
status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE(status)) {
ACPI_FREE(range_info);
return_ACPI_STATUS(status);
}
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%p-0x%p\n",
acpi_ut_get_node_name(range_info->region_node),
ACPI_CAST_PTR(void, address),
ACPI_CAST_PTR(void, range_info->end_address)));
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
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%p-0x%p\n",
acpi_ut_get_node_name(range_info->
region_node),
ACPI_CAST_PTR(void,
range_info->
start_address),
ACPI_CAST_PTR(void,
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.
* 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_external_pathname(range_info->
region_node);
ACPI_WARNING((AE_INFO,
"0x%p-0x%p %s conflicts with Region %s %d",
ACPI_CAST_PTR(void, address),
ACPI_CAST_PTR(void, end_address),
acpi_ut_get_region_name(space_id),
pathname, overlap_count));
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;
}
}