1 /*******************************************************************************
3 * Module Name: rslist - Linked list utilities
5 ******************************************************************************/
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24 * from this software without specific prior written permission.
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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
);