1 /*******************************************************************************
3 * Module Name: rslist - Linked list utilities
5 ******************************************************************************/
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48 #define _COMPONENT ACPI_RESOURCES
49 ACPI_MODULE_NAME ("rslist")
52 /*******************************************************************************
54 * FUNCTION: AcpiRsConvertAmlToResources
56 * PARAMETERS: ACPI_WALK_AML_CALLBACK
57 * ResourcePtr - Pointer to the buffer that will
58 * contain the output structures
62 * DESCRIPTION: Convert an AML resource to an internal representation of the
63 * resource that is aligned and easier to access.
65 ******************************************************************************/
68 AcpiRsConvertAmlToResources (
75 ACPI_RESOURCE **ResourcePtr = ACPI_CAST_INDIRECT_PTR (
76 ACPI_RESOURCE, Context);
77 ACPI_RESOURCE *Resource;
78 AML_RESOURCE *AmlResource;
79 ACPI_RSCONVERT_INFO *ConversionTable;
83 ACPI_FUNCTION_TRACE (RsConvertAmlToResources);
87 * Check that the input buffer and all subsequent pointers into it
88 * are aligned on a native word boundary. Most important on IA64
90 Resource = *ResourcePtr;
91 if (ACPI_IS_MISALIGNED (Resource))
93 ACPI_WARNING ((AE_INFO,
94 "Misaligned resource pointer %p", Resource));
97 /* Get the appropriate conversion info table */
99 AmlResource = ACPI_CAST_PTR (AML_RESOURCE, Aml);
101 if (AcpiUtGetResourceType (Aml) ==
102 ACPI_RESOURCE_NAME_SERIAL_BUS)
104 if (AmlResource->CommonSerialBus.Type >
105 AML_RESOURCE_MAX_SERIALBUSTYPE)
107 ConversionTable = NULL;
111 /* This is an I2C, SPI, or UART SerialBus descriptor */
113 ConversionTable = AcpiGbl_ConvertResourceSerialBusDispatch [
114 AmlResource->CommonSerialBus.Type];
119 ConversionTable = AcpiGbl_GetResourceDispatch[ResourceIndex];
122 if (!ConversionTable)
124 ACPI_ERROR ((AE_INFO,
125 "Invalid/unsupported resource descriptor: Type 0x%2.2X",
127 return_ACPI_STATUS (AE_AML_INVALID_RESOURCE_TYPE);
130 /* Convert the AML byte stream resource to a local resource struct */
132 Status = AcpiRsConvertAmlToResource (
133 Resource, AmlResource, ConversionTable);
134 if (ACPI_FAILURE (Status))
136 ACPI_EXCEPTION ((AE_INFO, Status,
137 "Could not convert AML resource (Type 0x%X)", *Aml));
138 return_ACPI_STATUS (Status);
141 ACPI_DEBUG_PRINT ((ACPI_DB_RESOURCES,
142 "Type %.2X, AmlLength %.2X InternalLength %.2X\n",
143 AcpiUtGetResourceType (Aml), Length,
146 /* Point to the next structure in the output buffer */
148 *ResourcePtr = ACPI_NEXT_RESOURCE (Resource);
149 return_ACPI_STATUS (AE_OK);
153 /*******************************************************************************
155 * FUNCTION: AcpiRsConvertResourcesToAml
157 * PARAMETERS: Resource - Pointer to the resource linked list
158 * AmlSizeNeeded - Calculated size of the byte stream
159 * needed from calling AcpiRsGetAmlLength()
160 * The size of the OutputBuffer is
161 * guaranteed to be >= AmlSizeNeeded
162 * OutputBuffer - Pointer to the buffer that will
163 * contain the byte stream
167 * DESCRIPTION: Takes the resource linked list and parses it, creating a
168 * byte stream of resources in the caller's output buffer
170 ******************************************************************************/
173 AcpiRsConvertResourcesToAml (
174 ACPI_RESOURCE *Resource,
175 ACPI_SIZE AmlSizeNeeded,
178 UINT8 *Aml = OutputBuffer;
179 UINT8 *EndAml = OutputBuffer + AmlSizeNeeded;
180 ACPI_RSCONVERT_INFO *ConversionTable;
184 ACPI_FUNCTION_TRACE (RsConvertResourcesToAml);
187 /* Walk the resource descriptor list, convert each descriptor */
191 /* Validate the (internal) Resource Type */
193 if (Resource->Type > ACPI_RESOURCE_TYPE_MAX)
195 ACPI_ERROR ((AE_INFO,
196 "Invalid descriptor type (0x%X) in resource list",
198 return_ACPI_STATUS (AE_BAD_DATA);
201 /* Sanity check the length. It must not be zero, or we loop forever */
203 if (!Resource->Length)
205 ACPI_ERROR ((AE_INFO,
206 "Invalid zero length descriptor in resource list\n"));
207 return_ACPI_STATUS (AE_AML_BAD_RESOURCE_LENGTH);
210 /* Perform the conversion */
212 if (Resource->Type == ACPI_RESOURCE_TYPE_SERIAL_BUS)
214 if (Resource->Data.CommonSerialBus.Type >
215 AML_RESOURCE_MAX_SERIALBUSTYPE)
217 ConversionTable = NULL;
221 /* This is an I2C, SPI, or UART SerialBus descriptor */
223 ConversionTable = AcpiGbl_ConvertResourceSerialBusDispatch[
224 Resource->Data.CommonSerialBus.Type];
229 ConversionTable = AcpiGbl_SetResourceDispatch[Resource->Type];
232 if (!ConversionTable)
234 ACPI_ERROR ((AE_INFO,
235 "Invalid/unsupported resource descriptor: Type 0x%2.2X",
237 return_ACPI_STATUS (AE_AML_INVALID_RESOURCE_TYPE);
240 Status = AcpiRsConvertResourceToAml (Resource,
241 ACPI_CAST_PTR (AML_RESOURCE, Aml), ConversionTable);
242 if (ACPI_FAILURE (Status))
244 ACPI_EXCEPTION ((AE_INFO, Status,
245 "Could not convert resource (type 0x%X) to AML",
247 return_ACPI_STATUS (Status);
250 /* Perform final sanity check on the new AML resource descriptor */
252 Status = AcpiUtValidateResource (
253 NULL, ACPI_CAST_PTR (AML_RESOURCE, Aml), NULL);
254 if (ACPI_FAILURE (Status))
256 return_ACPI_STATUS (Status);
259 /* Check for end-of-list, normal exit */
261 if (Resource->Type == ACPI_RESOURCE_TYPE_END_TAG)
263 /* An End Tag indicates the end of the input Resource Template */
265 return_ACPI_STATUS (AE_OK);
269 * Extract the total length of the new descriptor and set the
270 * Aml to point to the next (output) resource descriptor
272 Aml += AcpiUtGetDescriptorLength (Aml);
274 /* Point to the next input resource descriptor */
276 Resource = ACPI_NEXT_RESOURCE (Resource);
279 /* Completed buffer, but did not find an EndTag resource descriptor */
281 return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG);