1 /******************************************************************************
3 * Module Name: utalloc - local memory allocation routines
5 *****************************************************************************/
8 * Copyright (C) 2000 - 2013, Intel Corp.
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50 #define _COMPONENT ACPI_UTILITIES
51 ACPI_MODULE_NAME ("utalloc")
54 #if !defined (USE_NATIVE_ALLOCATE_ZEROED)
55 /*******************************************************************************
57 * FUNCTION: AcpiOsAllocateZeroed
59 * PARAMETERS: Size - Size of the allocation
61 * RETURN: Address of the allocated memory on success, NULL on failure.
63 * DESCRIPTION: Subsystem equivalent of calloc. Allocate and zero memory.
64 * This is the default implementation. Can be overridden via the
65 * USE_NATIVE_ALLOCATE_ZEROED flag.
67 ******************************************************************************/
70 AcpiOsAllocateZeroed (
76 ACPI_FUNCTION_ENTRY ();
79 Allocation = AcpiOsAllocate (Size);
82 /* Clear the memory block */
84 ACPI_MEMSET (Allocation, 0, Size);
90 #endif /* !USE_NATIVE_ALLOCATE_ZEROED */
93 /*******************************************************************************
95 * FUNCTION: AcpiUtCreateCaches
101 * DESCRIPTION: Create all local caches
103 ******************************************************************************/
112 /* Object Caches, for frequently used objects */
114 Status = AcpiOsCreateCache ("Acpi-Namespace", sizeof (ACPI_NAMESPACE_NODE),
115 ACPI_MAX_NAMESPACE_CACHE_DEPTH, &AcpiGbl_NamespaceCache);
116 if (ACPI_FAILURE (Status))
121 Status = AcpiOsCreateCache ("Acpi-State", sizeof (ACPI_GENERIC_STATE),
122 ACPI_MAX_STATE_CACHE_DEPTH, &AcpiGbl_StateCache);
123 if (ACPI_FAILURE (Status))
128 Status = AcpiOsCreateCache ("Acpi-Parse", sizeof (ACPI_PARSE_OBJ_COMMON),
129 ACPI_MAX_PARSE_CACHE_DEPTH, &AcpiGbl_PsNodeCache);
130 if (ACPI_FAILURE (Status))
135 Status = AcpiOsCreateCache ("Acpi-ParseExt", sizeof (ACPI_PARSE_OBJ_NAMED),
136 ACPI_MAX_EXTPARSE_CACHE_DEPTH, &AcpiGbl_PsNodeExtCache);
137 if (ACPI_FAILURE (Status))
142 Status = AcpiOsCreateCache ("Acpi-Operand", sizeof (ACPI_OPERAND_OBJECT),
143 ACPI_MAX_OBJECT_CACHE_DEPTH, &AcpiGbl_OperandCache);
144 if (ACPI_FAILURE (Status))
150 #ifdef ACPI_DBG_TRACK_ALLOCATIONS
152 /* Memory allocation lists */
154 Status = AcpiUtCreateList ("Acpi-Global", 0,
155 &AcpiGbl_GlobalList);
156 if (ACPI_FAILURE (Status))
161 Status = AcpiUtCreateList ("Acpi-Namespace", sizeof (ACPI_NAMESPACE_NODE),
162 &AcpiGbl_NsNodeList);
163 if (ACPI_FAILURE (Status))
173 /*******************************************************************************
175 * FUNCTION: AcpiUtDeleteCaches
181 * DESCRIPTION: Purge and delete all local caches
183 ******************************************************************************/
189 #ifdef ACPI_DBG_TRACK_ALLOCATIONS
192 if (AcpiGbl_DisplayFinalMemStats)
194 ACPI_STRCPY (Buffer, "MEMORY");
195 (void) AcpiDbDisplayStatistics (Buffer);
199 (void) AcpiOsDeleteCache (AcpiGbl_NamespaceCache);
200 AcpiGbl_NamespaceCache = NULL;
202 (void) AcpiOsDeleteCache (AcpiGbl_StateCache);
203 AcpiGbl_StateCache = NULL;
205 (void) AcpiOsDeleteCache (AcpiGbl_OperandCache);
206 AcpiGbl_OperandCache = NULL;
208 (void) AcpiOsDeleteCache (AcpiGbl_PsNodeCache);
209 AcpiGbl_PsNodeCache = NULL;
211 (void) AcpiOsDeleteCache (AcpiGbl_PsNodeExtCache);
212 AcpiGbl_PsNodeExtCache = NULL;
215 #ifdef ACPI_DBG_TRACK_ALLOCATIONS
217 /* Debug only - display leftover memory allocation, if any */
219 AcpiUtDumpAllocations (ACPI_UINT32_MAX, NULL);
221 /* Free memory lists */
223 AcpiOsFree (AcpiGbl_GlobalList);
224 AcpiGbl_GlobalList = NULL;
226 AcpiOsFree (AcpiGbl_NsNodeList);
227 AcpiGbl_NsNodeList = NULL;
234 /*******************************************************************************
236 * FUNCTION: AcpiUtValidateBuffer
238 * PARAMETERS: Buffer - Buffer descriptor to be validated
242 * DESCRIPTION: Perform parameter validation checks on an ACPI_BUFFER
244 ******************************************************************************/
247 AcpiUtValidateBuffer (
251 /* Obviously, the structure pointer must be valid */
255 return (AE_BAD_PARAMETER);
258 /* Special semantics for the length */
260 if ((Buffer->Length == ACPI_NO_BUFFER) ||
261 (Buffer->Length == ACPI_ALLOCATE_BUFFER) ||
262 (Buffer->Length == ACPI_ALLOCATE_LOCAL_BUFFER))
267 /* Length is valid, the buffer pointer must be also */
269 if (!Buffer->Pointer)
271 return (AE_BAD_PARAMETER);
278 /*******************************************************************************
280 * FUNCTION: AcpiUtInitializeBuffer
282 * PARAMETERS: Buffer - Buffer to be validated
283 * RequiredLength - Length needed
287 * DESCRIPTION: Validate that the buffer is of the required length or
288 * allocate a new buffer. Returned buffer is always zeroed.
290 ******************************************************************************/
293 AcpiUtInitializeBuffer (
295 ACPI_SIZE RequiredLength)
297 ACPI_SIZE InputBufferLength;
300 /* Parameter validation */
302 if (!Buffer || !RequiredLength)
304 return (AE_BAD_PARAMETER);
308 * Buffer->Length is used as both an input and output parameter. Get the
309 * input actual length and set the output required buffer length.
311 InputBufferLength = Buffer->Length;
312 Buffer->Length = RequiredLength;
315 * The input buffer length contains the actual buffer length, or the type
316 * of buffer to be allocated by this routine.
318 switch (InputBufferLength)
322 /* Return the exception (and the required buffer length) */
324 return (AE_BUFFER_OVERFLOW);
326 case ACPI_ALLOCATE_BUFFER:
328 * Allocate a new buffer. We directectly call AcpiOsAllocate here to
329 * purposefully bypass the (optionally enabled) internal allocation
330 * tracking mechanism since we only want to track internal
331 * allocations. Note: The caller should use AcpiOsFree to free this
332 * buffer created via ACPI_ALLOCATE_BUFFER.
334 Buffer->Pointer = AcpiOsAllocate (RequiredLength);
337 case ACPI_ALLOCATE_LOCAL_BUFFER:
339 /* Allocate a new buffer with local interface to allow tracking */
341 Buffer->Pointer = ACPI_ALLOCATE (RequiredLength);
346 /* Existing buffer: Validate the size of the buffer */
348 if (InputBufferLength < RequiredLength)
350 return (AE_BUFFER_OVERFLOW);
355 /* Validate allocation from above or input buffer pointer */
357 if (!Buffer->Pointer)
359 return (AE_NO_MEMORY);
362 /* Have a valid buffer, clear it */
364 ACPI_MEMSET (Buffer->Pointer, 0, RequiredLength);