1 /******************************************************************************
3 * Module Name: utaddress - OpRegion address range check
5 *****************************************************************************/
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49 #define _COMPONENT ACPI_UTILITIES
50 ACPI_MODULE_NAME ("utaddress")
53 /*******************************************************************************
55 * FUNCTION: AcpiUtAddAddressRange
57 * PARAMETERS: SpaceId - Address space ID
58 * Address - OpRegion start address
59 * Length - OpRegion length
60 * RegionNode - OpRegion namespace node
64 * DESCRIPTION: Add the Operation Region address range to the global list.
65 * The only supported Space IDs are Memory and I/O. Called when
66 * the OpRegion address/length operands are fully evaluated.
68 * MUTEX: Locks the namespace
70 * NOTE: Because this interface is only called when an OpRegion argument
71 * list is evaluated, there cannot be any duplicate RegionNodes.
72 * Duplicate Address/Length values are allowed, however, so that multiple
73 * address conflicts can be detected.
75 ******************************************************************************/
78 AcpiUtAddAddressRange (
79 ACPI_ADR_SPACE_TYPE SpaceId,
80 ACPI_PHYSICAL_ADDRESS Address,
82 ACPI_NAMESPACE_NODE *RegionNode)
84 ACPI_ADDRESS_RANGE *RangeInfo;
88 ACPI_FUNCTION_TRACE (UtAddAddressRange);
91 if ((SpaceId != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
92 (SpaceId != ACPI_ADR_SPACE_SYSTEM_IO))
94 return_ACPI_STATUS (AE_OK);
97 /* Allocate/init a new info block, add it to the appropriate list */
99 RangeInfo = ACPI_ALLOCATE (sizeof (ACPI_ADDRESS_RANGE));
102 return_ACPI_STATUS (AE_NO_MEMORY);
105 RangeInfo->StartAddress = Address;
106 RangeInfo->EndAddress = (Address + Length - 1);
107 RangeInfo->RegionNode = RegionNode;
109 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
110 if (ACPI_FAILURE (Status))
112 ACPI_FREE (RangeInfo);
113 return_ACPI_STATUS (Status);
116 RangeInfo->Next = AcpiGbl_AddressRangeList[SpaceId];
117 AcpiGbl_AddressRangeList[SpaceId] = RangeInfo;
119 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
120 "\nAdded [%4.4s] address range: 0x%8.8X%8.8X-0x%8.8X%8.8X\n",
121 AcpiUtGetNodeName (RangeInfo->RegionNode),
122 ACPI_FORMAT_UINT64 (Address),
123 ACPI_FORMAT_UINT64 (RangeInfo->EndAddress)));
125 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
126 return_ACPI_STATUS (AE_OK);
130 /*******************************************************************************
132 * FUNCTION: AcpiUtRemoveAddressRange
134 * PARAMETERS: SpaceId - Address space ID
135 * RegionNode - OpRegion namespace node
139 * DESCRIPTION: Remove the Operation Region from the global list. The only
140 * supported Space IDs are Memory and I/O. Called when an
141 * OpRegion is deleted.
143 * MUTEX: Assumes the namespace is locked
145 ******************************************************************************/
148 AcpiUtRemoveAddressRange (
149 ACPI_ADR_SPACE_TYPE SpaceId,
150 ACPI_NAMESPACE_NODE *RegionNode)
152 ACPI_ADDRESS_RANGE *RangeInfo;
153 ACPI_ADDRESS_RANGE *Prev;
156 ACPI_FUNCTION_TRACE (UtRemoveAddressRange);
159 if ((SpaceId != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
160 (SpaceId != ACPI_ADR_SPACE_SYSTEM_IO))
165 /* Get the appropriate list head and check the list */
167 RangeInfo = Prev = AcpiGbl_AddressRangeList[SpaceId];
170 if (RangeInfo->RegionNode == RegionNode)
172 if (RangeInfo == Prev) /* Found at list head */
174 AcpiGbl_AddressRangeList[SpaceId] = RangeInfo->Next;
178 Prev->Next = RangeInfo->Next;
181 ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
182 "\nRemoved [%4.4s] address range: 0x%8.8X%8.8X-0x%8.8X%8.8X\n",
183 AcpiUtGetNodeName (RangeInfo->RegionNode),
184 ACPI_FORMAT_UINT64 (RangeInfo->StartAddress),
185 ACPI_FORMAT_UINT64 (RangeInfo->EndAddress)));
187 ACPI_FREE (RangeInfo);
192 RangeInfo = RangeInfo->Next;
199 /*******************************************************************************
201 * FUNCTION: AcpiUtCheckAddressRange
203 * PARAMETERS: SpaceId - Address space ID
204 * Address - Start address
205 * Length - Length of address range
206 * Warn - TRUE if warning on overlap desired
208 * RETURN: Count of the number of conflicts detected. Zero is always
209 * returned for Space IDs other than Memory or I/O.
211 * DESCRIPTION: Check if the input address range overlaps any of the
212 * ASL operation region address ranges. The only supported
213 * Space IDs are Memory and I/O.
215 * MUTEX: Assumes the namespace is locked.
217 ******************************************************************************/
220 AcpiUtCheckAddressRange (
221 ACPI_ADR_SPACE_TYPE SpaceId,
222 ACPI_PHYSICAL_ADDRESS Address,
226 ACPI_ADDRESS_RANGE *RangeInfo;
227 ACPI_PHYSICAL_ADDRESS EndAddress;
229 UINT32 OverlapCount = 0;
232 ACPI_FUNCTION_TRACE (UtCheckAddressRange);
235 if ((SpaceId != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
236 (SpaceId != ACPI_ADR_SPACE_SYSTEM_IO))
241 RangeInfo = AcpiGbl_AddressRangeList[SpaceId];
242 EndAddress = Address + Length - 1;
244 /* Check entire list for all possible conflicts */
249 * Check if the requested address/length overlaps this
250 * address range. There are four cases to consider:
252 * 1) Input address/length is contained completely in the
254 * 2) Input address/length overlaps range at the range start
255 * 3) Input address/length overlaps range at the range end
256 * 4) Input address/length completely encompasses the range
258 if ((Address <= RangeInfo->EndAddress) &&
259 (EndAddress >= RangeInfo->StartAddress))
261 /* Found an address range overlap */
264 if (Warn) /* Optional warning message */
266 Pathname = AcpiNsGetExternalPathname (RangeInfo->RegionNode);
268 ACPI_WARNING ((AE_INFO,
269 "%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)",
270 AcpiUtGetRegionName (SpaceId),
271 ACPI_FORMAT_UINT64 (Address),
272 ACPI_FORMAT_UINT64 (EndAddress),
273 ACPI_FORMAT_UINT64 (RangeInfo->StartAddress),
274 ACPI_FORMAT_UINT64 (RangeInfo->EndAddress),
276 ACPI_FREE (Pathname);
280 RangeInfo = RangeInfo->Next;
283 return_UINT32 (OverlapCount);
287 /*******************************************************************************
289 * FUNCTION: AcpiUtDeleteAddressLists
295 * DESCRIPTION: Delete all global address range lists (called during
296 * subsystem shutdown).
298 ******************************************************************************/
301 AcpiUtDeleteAddressLists (
304 ACPI_ADDRESS_RANGE *Next;
305 ACPI_ADDRESS_RANGE *RangeInfo;
309 /* Delete all elements in all address range lists */
311 for (i = 0; i < ACPI_ADDRESS_RANGE_MAX; i++)
313 Next = AcpiGbl_AddressRangeList[i];
318 Next = RangeInfo->Next;
319 ACPI_FREE (RangeInfo);
322 AcpiGbl_AddressRangeList[i] = NULL;