1 /******************************************************************************
3 * Module Name: tbrsdt - ACPI RSDT table utilities
6 *****************************************************************************/
8 /******************************************************************************
12 * Some or all of this work - Copyright (c) 1999 - 2004, Intel Corp.
13 * All rights reserved.
17 * 2.1. This is your license from Intel Corp. under its intellectual property
18 * rights. You may have additional license terms from the party that provided
19 * you this software, covering your right to use that party's intellectual
22 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
23 * copy of the source code appearing in this file ("Covered Code") an
24 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
25 * base code distributed originally by Intel ("Original Intel Code") to copy,
26 * make derivatives, distribute, use and display any portion of the Covered
27 * Code in any form, with the right to sublicense such rights; and
29 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
30 * license (with the right to sublicense), under only those claims of Intel
31 * patents that are infringed by the Original Intel Code, to make, use, sell,
32 * offer to sell, and import the Covered Code and derivative works thereof
33 * solely to the minimum extent necessary to exercise the above copyright
34 * license, and in no event shall the patent license extend to any additions
35 * to or modifications of the Original Intel Code. No other license or right
36 * is granted directly or by implication, estoppel or otherwise;
38 * The above copyright and patent license is granted only if the following
43 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
44 * Redistribution of source code of any substantial portion of the Covered
45 * Code or modification with rights to further distribute source must include
46 * the above Copyright Notice, the above License, this list of Conditions,
47 * and the following Disclaimer and Export Compliance provision. In addition,
48 * Licensee must cause all Covered Code to which Licensee contributes to
49 * contain a file documenting the changes Licensee made to create that Covered
50 * Code and the date of any change. Licensee must include in that file the
51 * documentation of any changes made by any predecessor Licensee. Licensee
52 * must include a prominent statement that the modification is derived,
53 * directly or indirectly, from Original Intel Code.
55 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
56 * Redistribution of source code of any substantial portion of the Covered
57 * Code or modification without rights to further distribute source must
58 * include the following Disclaimer and Export Compliance provision in the
59 * documentation and/or other materials provided with distribution. In
60 * addition, Licensee may not authorize further sublicense of source of any
61 * portion of the Covered Code, and must include terms to the effect that the
62 * license from Licensee to its licensee is limited to the intellectual
63 * property embodied in the software Licensee provides to its licensee, and
64 * not to intellectual property embodied in modifications its licensee may
67 * 3.3. Redistribution of Executable. Redistribution in executable form of any
68 * substantial portion of the Covered Code or modification must reproduce the
69 * above Copyright Notice, and the following Disclaimer and Export Compliance
70 * provision in the documentation and/or other materials provided with the
73 * 3.4. Intel retains all right, title, and interest in and to the Original
76 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
77 * Intel shall be used in advertising or otherwise to promote the sale, use or
78 * other dealings in products derived from or relating to the Covered Code
79 * without prior written authorization from Intel.
81 * 4. Disclaimer and Export Compliance
83 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
84 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
85 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
86 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
87 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
88 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
91 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
92 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
93 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
94 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
95 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
96 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
97 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
100 * 4.3. Licensee shall not export, either directly or indirectly, any of this
101 * software or system incorporating such software without first obtaining any
102 * required license or other approval from the U. S. Department of Commerce or
103 * any other agency or department of the United States Government. In the
104 * event Licensee exports any such software from the United States or
105 * re-exports any such software from a foreign destination, Licensee shall
106 * ensure that the distribution and export/re-export of the software is in
107 * compliance with all laws, regulations, orders, or other restrictions of the
108 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
109 * any of its subsidiaries will export/re-export any technical data, process,
110 * software, or service, directly or indirectly, to any country for which the
111 * United States government or any agency thereof requires an export license,
112 * other governmental approval, or letter of assurance, without first obtaining
113 * such license, approval or letter.
115 *****************************************************************************/
120 #include "actables.h"
123 #define _COMPONENT ACPI_TABLES
124 ACPI_MODULE_NAME ("tbrsdt")
127 /*******************************************************************************
129 * FUNCTION: AcpiTbVerifyRsdp
131 * PARAMETERS: Address - RSDP (Pointer to RSDT)
135 * DESCRIPTION: Load and validate the RSDP (ptr) and RSDT (table)
137 ******************************************************************************/
141 ACPI_POINTER *Address)
143 ACPI_TABLE_DESC TableInfo;
145 RSDP_DESCRIPTOR *Rsdp;
148 ACPI_FUNCTION_TRACE ("TbVerifyRsdp");
151 switch (Address->PointerType)
153 case ACPI_LOGICAL_POINTER:
155 Rsdp = Address->Pointer.Logical;
158 case ACPI_PHYSICAL_POINTER:
160 * Obtain access to the RSDP structure
162 Status = AcpiOsMapMemory (Address->Pointer.Physical, sizeof (RSDP_DESCRIPTOR),
164 if (ACPI_FAILURE (Status))
166 return_ACPI_STATUS (Status);
171 return_ACPI_STATUS (AE_BAD_PARAMETER);
175 * The signature and checksum must both be correct
177 if (ACPI_STRNCMP ((char *) Rsdp, RSDP_SIG, sizeof (RSDP_SIG)-1) != 0)
179 /* Nope, BAD Signature */
181 Status = AE_BAD_SIGNATURE;
185 /* Check the standard checksum */
187 if (AcpiTbChecksum (Rsdp, ACPI_RSDP_CHECKSUM_LENGTH) != 0)
189 Status = AE_BAD_CHECKSUM;
193 /* Check extended checksum if table version >= 2 */
195 if (Rsdp->Revision >= 2)
197 if (AcpiTbChecksum (Rsdp, ACPI_RSDP_XCHECKSUM_LENGTH) != 0)
199 Status = AE_BAD_CHECKSUM;
204 /* The RSDP supplied is OK */
206 TableInfo.Pointer = ACPI_CAST_PTR (ACPI_TABLE_HEADER, Rsdp);
207 TableInfo.Length = sizeof (RSDP_DESCRIPTOR);
208 TableInfo.Allocation = ACPI_MEM_MAPPED;
210 /* Save the table pointers and allocation info */
212 Status = AcpiTbInitTableDescriptor (ACPI_TABLE_RSDP, &TableInfo);
213 if (ACPI_FAILURE (Status))
218 /* Save the RSDP in a global for easy access */
220 AcpiGbl_RSDP = ACPI_CAST_PTR (RSDP_DESCRIPTOR, TableInfo.Pointer);
221 return_ACPI_STATUS (Status);
227 if (AcpiGbl_TableFlags & ACPI_PHYSICAL_POINTER)
229 AcpiOsUnmapMemory (Rsdp, sizeof (RSDP_DESCRIPTOR));
231 return_ACPI_STATUS (Status);
235 /*******************************************************************************
237 * FUNCTION: AcpiTbGetRsdtAddress
241 * RETURN: RSDT physical address
243 * DESCRIPTION: Extract the address of the RSDT or XSDT, depending on the
244 * version of the RSDP
246 ******************************************************************************/
249 AcpiTbGetRsdtAddress (
250 ACPI_POINTER *OutAddress)
253 ACPI_FUNCTION_ENTRY ();
256 OutAddress->PointerType = AcpiGbl_TableFlags | ACPI_LOGICAL_ADDRESSING;
259 * For RSDP revision 0 or 1, we use the RSDT.
260 * For RSDP revision 2 (and above), we use the XSDT
262 if (AcpiGbl_RSDP->Revision < 2)
264 OutAddress->Pointer.Value = AcpiGbl_RSDP->RsdtPhysicalAddress;
268 OutAddress->Pointer.Value = ACPI_GET_ADDRESS (AcpiGbl_RSDP->XsdtPhysicalAddress);
273 /*******************************************************************************
275 * FUNCTION: AcpiTbValidateRsdt
277 * PARAMETERS: TablePtr - Addressable pointer to the RSDT.
281 * DESCRIPTION: Validate signature for the RSDT or XSDT
283 ******************************************************************************/
287 ACPI_TABLE_HEADER *TablePtr)
292 ACPI_FUNCTION_NAME ("TbValidateRsdt");
296 * For RSDP revision 0 or 1, we use the RSDT.
297 * For RSDP revision 2 and above, we use the XSDT
299 if (AcpiGbl_RSDP->Revision < 2)
301 NoMatch = ACPI_STRNCMP ((char *) TablePtr, RSDT_SIG,
302 sizeof (RSDT_SIG) -1);
306 NoMatch = ACPI_STRNCMP ((char *) TablePtr, XSDT_SIG,
307 sizeof (XSDT_SIG) -1);
312 /* Invalid RSDT or XSDT signature */
314 ACPI_REPORT_ERROR (("Invalid signature where RSDP indicates RSDT/XSDT should be located\n"));
316 ACPI_DUMP_BUFFER (AcpiGbl_RSDP, 20);
318 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_ERROR,
319 "RSDT/XSDT signature at %X (%p) is invalid\n",
320 AcpiGbl_RSDP->RsdtPhysicalAddress,
321 (void *) (ACPI_NATIVE_UINT) AcpiGbl_RSDP->RsdtPhysicalAddress));
323 if (AcpiGbl_RSDP->Revision < 2)
325 ACPI_REPORT_ERROR (("Looking for RSDT (RSDP->Rev < 2)\n"))
329 ACPI_REPORT_ERROR (("Looking for XSDT (RSDP->Rev >= 2)\n"))
332 ACPI_DUMP_BUFFER ((char *) TablePtr, 48);
334 return (AE_BAD_SIGNATURE);
341 /*******************************************************************************
343 * FUNCTION: AcpiTbGetTableRsdt
349 * DESCRIPTION: Load and validate the RSDP (ptr) and RSDT (table)
351 ******************************************************************************/
357 ACPI_TABLE_DESC TableInfo;
359 ACPI_POINTER Address;
362 ACPI_FUNCTION_TRACE ("TbGetTableRsdt");
365 /* Get the RSDT/XSDT via the RSDP */
367 AcpiTbGetRsdtAddress (&Address);
369 TableInfo.Type = ACPI_TABLE_XSDT;
370 Status = AcpiTbGetTable (&Address, &TableInfo);
371 if (ACPI_FAILURE (Status))
373 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not get the RSDT/XSDT, %s\n",
374 AcpiFormatException (Status)));
375 return_ACPI_STATUS (Status);
378 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
379 "RSDP located at %p, points to RSDT physical=%8.8X%8.8X \n",
381 ACPI_FORMAT_UINT64 (Address.Pointer.Value)));
383 /* Check the RSDT or XSDT signature */
385 Status = AcpiTbValidateRsdt (TableInfo.Pointer);
386 if (ACPI_FAILURE (Status))
388 return_ACPI_STATUS (Status);
391 /* Get the number of tables defined in the RSDT or XSDT */
393 AcpiGbl_RsdtTableCount = AcpiTbGetTableCount (AcpiGbl_RSDP, TableInfo.Pointer);
395 /* Convert and/or copy to an XSDT structure */
397 Status = AcpiTbConvertToXsdt (&TableInfo);
398 if (ACPI_FAILURE (Status))
400 return_ACPI_STATUS (Status);
403 /* Save the table pointers and allocation info */
405 Status = AcpiTbInitTableDescriptor (ACPI_TABLE_XSDT, &TableInfo);
406 if (ACPI_FAILURE (Status))
408 return_ACPI_STATUS (Status);
411 AcpiGbl_XSDT = ACPI_CAST_PTR (XSDT_DESCRIPTOR, TableInfo.Pointer);
413 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "XSDT located at %p\n", AcpiGbl_XSDT));
414 return_ACPI_STATUS (Status);