2 /*******************************************************************************
4 * Module Name: hwregs - Read/write access functions for the various ACPI
5 * control and status registers.
8 ******************************************************************************/
10 /******************************************************************************
14 * Some or all of this work - Copyright (c) 1999 - 2005, Intel Corp.
15 * All rights reserved.
19 * 2.1. This is your license from Intel Corp. under its intellectual property
20 * rights. You may have additional license terms from the party that provided
21 * you this software, covering your right to use that party's intellectual
24 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
25 * copy of the source code appearing in this file ("Covered Code") an
26 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
27 * base code distributed originally by Intel ("Original Intel Code") to copy,
28 * make derivatives, distribute, use and display any portion of the Covered
29 * Code in any form, with the right to sublicense such rights; and
31 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
32 * license (with the right to sublicense), under only those claims of Intel
33 * patents that are infringed by the Original Intel Code, to make, use, sell,
34 * offer to sell, and import the Covered Code and derivative works thereof
35 * solely to the minimum extent necessary to exercise the above copyright
36 * license, and in no event shall the patent license extend to any additions
37 * to or modifications of the Original Intel Code. No other license or right
38 * is granted directly or by implication, estoppel or otherwise;
40 * The above copyright and patent license is granted only if the following
45 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
46 * Redistribution of source code of any substantial portion of the Covered
47 * Code or modification with rights to further distribute source must include
48 * the above Copyright Notice, the above License, this list of Conditions,
49 * and the following Disclaimer and Export Compliance provision. In addition,
50 * Licensee must cause all Covered Code to which Licensee contributes to
51 * contain a file documenting the changes Licensee made to create that Covered
52 * Code and the date of any change. Licensee must include in that file the
53 * documentation of any changes made by any predecessor Licensee. Licensee
54 * must include a prominent statement that the modification is derived,
55 * directly or indirectly, from Original Intel Code.
57 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
58 * Redistribution of source code of any substantial portion of the Covered
59 * Code or modification without rights to further distribute source must
60 * include the following Disclaimer and Export Compliance provision in the
61 * documentation and/or other materials provided with distribution. In
62 * addition, Licensee may not authorize further sublicense of source of any
63 * portion of the Covered Code, and must include terms to the effect that the
64 * license from Licensee to its licensee is limited to the intellectual
65 * property embodied in the software Licensee provides to its licensee, and
66 * not to intellectual property embodied in modifications its licensee may
69 * 3.3. Redistribution of Executable. Redistribution in executable form of any
70 * substantial portion of the Covered Code or modification must reproduce the
71 * above Copyright Notice, and the following Disclaimer and Export Compliance
72 * provision in the documentation and/or other materials provided with the
75 * 3.4. Intel retains all right, title, and interest in and to the Original
78 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
79 * Intel shall be used in advertising or otherwise to promote the sale, use or
80 * other dealings in products derived from or relating to the Covered Code
81 * without prior written authorization from Intel.
83 * 4. Disclaimer and Export Compliance
85 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
86 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
87 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
88 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
89 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
90 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
93 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
94 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
95 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
96 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
97 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
98 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
99 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
102 * 4.3. Licensee shall not export, either directly or indirectly, any of this
103 * software or system incorporating such software without first obtaining any
104 * required license or other approval from the U. S. Department of Commerce or
105 * any other agency or department of the United States Government. In the
106 * event Licensee exports any such software from the United States or
107 * re-exports any such software from a foreign destination, Licensee shall
108 * ensure that the distribution and export/re-export of the software is in
109 * compliance with all laws, regulations, orders, or other restrictions of the
110 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
111 * any of its subsidiaries will export/re-export any technical data, process,
112 * software, or service, directly or indirectly, to any country for which the
113 * United States government or any agency thereof requires an export license,
114 * other governmental approval, or letter of assurance, without first obtaining
115 * such license, approval or letter.
117 *****************************************************************************/
121 #include <contrib/dev/acpica/acpi.h>
122 #include <contrib/dev/acpica/acnamesp.h>
123 #include <contrib/dev/acpica/acevents.h>
125 #define _COMPONENT ACPI_HARDWARE
126 ACPI_MODULE_NAME ("hwregs")
129 /*******************************************************************************
131 * FUNCTION: AcpiHwClearAcpiStatus
133 * PARAMETERS: Flags - Lock the hardware or not
137 * DESCRIPTION: Clears all fixed and general purpose status bits
138 * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
140 ******************************************************************************/
143 AcpiHwClearAcpiStatus (
149 ACPI_FUNCTION_TRACE ("HwClearAcpiStatus");
152 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "About to write %04X to %04X\n",
153 ACPI_BITMASK_ALL_FIXED_STATUS,
154 (UINT16) ACPI_GET_ADDRESS (AcpiGbl_FADT->XPm1aEvtBlk.Address)));
156 if (Flags & ACPI_MTX_LOCK)
158 Status = AcpiUtAcquireMutex (ACPI_MTX_HARDWARE);
159 if (ACPI_FAILURE (Status))
161 return_ACPI_STATUS (Status);
165 Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK,
166 ACPI_REGISTER_PM1_STATUS,
167 ACPI_BITMASK_ALL_FIXED_STATUS);
168 if (ACPI_FAILURE (Status))
173 /* Clear the fixed events */
175 if (ACPI_VALID_ADDRESS (AcpiGbl_FADT->XPm1bEvtBlk.Address))
177 Status = AcpiHwLowLevelWrite (16, ACPI_BITMASK_ALL_FIXED_STATUS,
178 &AcpiGbl_FADT->XPm1bEvtBlk);
179 if (ACPI_FAILURE (Status))
185 /* Clear the GPE Bits in all GPE registers in all GPE blocks */
187 Status = AcpiEvWalkGpeList (AcpiHwClearGpeBlock);
190 if (Flags & ACPI_MTX_LOCK)
192 (void) AcpiUtReleaseMutex (ACPI_MTX_HARDWARE);
194 return_ACPI_STATUS (Status);
198 /*******************************************************************************
200 * FUNCTION: AcpiGetSleepTypeData
202 * PARAMETERS: SleepState - Numeric sleep state
203 * *SleepTypeA - Where SLP_TYPa is returned
204 * *SleepTypeB - Where SLP_TYPb is returned
206 * RETURN: Status - ACPI status
208 * DESCRIPTION: Obtain the SLP_TYPa and SLP_TYPb values for the requested sleep
211 ******************************************************************************/
214 AcpiGetSleepTypeData (
219 ACPI_STATUS Status = AE_OK;
220 ACPI_PARAMETER_INFO Info;
221 char *SleepStateName;
224 ACPI_FUNCTION_TRACE ("AcpiGetSleepTypeData");
227 /* Validate parameters */
229 if ((SleepState > ACPI_S_STATES_MAX) ||
230 !SleepTypeA || !SleepTypeB)
232 return_ACPI_STATUS (AE_BAD_PARAMETER);
235 /* Evaluate the namespace object containing the values for this state */
237 Info.Parameters = NULL;
238 Info.ReturnObject = NULL;
239 SleepStateName = (char *) (uintptr_t) AcpiGbl_SleepStateNames[SleepState];
241 Status = AcpiNsEvaluateByName (SleepStateName, &Info);
242 if (ACPI_FAILURE (Status))
244 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
245 "%s while evaluating SleepState [%s]\n",
246 AcpiFormatException (Status), SleepStateName));
248 return_ACPI_STATUS (Status);
251 /* Must have a return object */
253 if (!Info.ReturnObject)
255 ACPI_REPORT_ERROR (("No Sleep State object returned from [%s]\n",
257 Status = AE_NOT_EXIST;
260 /* It must be of type Package */
262 else if (ACPI_GET_OBJECT_TYPE (Info.ReturnObject) != ACPI_TYPE_PACKAGE)
264 ACPI_REPORT_ERROR (("Sleep State return object is not a Package\n"));
265 Status = AE_AML_OPERAND_TYPE;
269 * The package must have at least two elements. NOTE (March 2005): This
270 * goes against the current ACPI spec which defines this object as a
271 * package with one encoded DWORD element. However, existing practice
272 * by BIOS vendors seems to be to have 2 or more elements, at least
273 * one per sleep type (A/B).
275 else if (Info.ReturnObject->Package.Count < 2)
278 "Sleep State return package does not have at least two elements\n"));
279 Status = AE_AML_NO_OPERAND;
282 /* The first two elements must both be of type Integer */
284 else if ((ACPI_GET_OBJECT_TYPE (Info.ReturnObject->Package.Elements[0])
285 != ACPI_TYPE_INTEGER) ||
286 (ACPI_GET_OBJECT_TYPE (Info.ReturnObject->Package.Elements[1])
287 != ACPI_TYPE_INTEGER))
290 "Sleep State return package elements are not both Integers (%s, %s)\n",
291 AcpiUtGetObjectTypeName (Info.ReturnObject->Package.Elements[0]),
292 AcpiUtGetObjectTypeName (Info.ReturnObject->Package.Elements[1])));
293 Status = AE_AML_OPERAND_TYPE;
297 /* Valid _Sx_ package size, type, and value */
299 *SleepTypeA = (UINT8)
300 (Info.ReturnObject->Package.Elements[0])->Integer.Value;
301 *SleepTypeB = (UINT8)
302 (Info.ReturnObject->Package.Elements[1])->Integer.Value;
305 if (ACPI_FAILURE (Status))
307 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
308 "%s While evaluating SleepState [%s], bad Sleep object %p type %s\n",
309 AcpiFormatException (Status),
310 SleepStateName, Info.ReturnObject,
311 AcpiUtGetObjectTypeName (Info.ReturnObject)));
314 AcpiUtRemoveReference (Info.ReturnObject);
315 return_ACPI_STATUS (Status);
319 /*******************************************************************************
321 * FUNCTION: AcpiHwGetRegisterBitMask
323 * PARAMETERS: RegisterId - Index of ACPI Register to access
325 * RETURN: The bitmask to be used when accessing the register
327 * DESCRIPTION: Map RegisterId into a register bitmask.
329 ******************************************************************************/
331 ACPI_BIT_REGISTER_INFO *
332 AcpiHwGetBitRegisterInfo (
335 ACPI_FUNCTION_NAME ("HwGetBitRegisterInfo");
338 if (RegisterId > ACPI_BITREG_MAX)
340 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Invalid BitRegister ID: %X\n", RegisterId));
344 return (&AcpiGbl_BitRegisterInfo[RegisterId]);
348 /*******************************************************************************
350 * FUNCTION: AcpiGetRegister
352 * PARAMETERS: RegisterId - ID of ACPI BitRegister to access
353 * ReturnValue - Value that was read from the register
354 * Flags - Lock the hardware or not
356 * RETURN: Status and the value read from specified Register. Value
357 * returned is normalized to bit0 (is shifted all the way right)
359 * DESCRIPTION: ACPI BitRegister read function.
361 ******************************************************************************/
369 UINT32 RegisterValue = 0;
370 ACPI_BIT_REGISTER_INFO *BitRegInfo;
374 ACPI_FUNCTION_TRACE ("AcpiGetRegister");
377 /* Get the info structure corresponding to the requested ACPI Register */
379 BitRegInfo = AcpiHwGetBitRegisterInfo (RegisterId);
382 return_ACPI_STATUS (AE_BAD_PARAMETER);
385 if (Flags & ACPI_MTX_LOCK)
387 Status = AcpiUtAcquireMutex (ACPI_MTX_HARDWARE);
388 if (ACPI_FAILURE (Status))
390 return_ACPI_STATUS (Status);
394 /* Read from the register */
396 Status = AcpiHwRegisterRead (ACPI_MTX_DO_NOT_LOCK,
397 BitRegInfo->ParentRegister, &RegisterValue);
399 if (Flags & ACPI_MTX_LOCK)
401 (void) AcpiUtReleaseMutex (ACPI_MTX_HARDWARE);
404 if (ACPI_SUCCESS (Status))
406 /* Normalize the value that was read */
408 RegisterValue = ((RegisterValue & BitRegInfo->AccessBitMask)
409 >> BitRegInfo->BitPosition);
411 *ReturnValue = RegisterValue;
413 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "Read value %8.8X register %X\n",
414 RegisterValue, BitRegInfo->ParentRegister));
417 return_ACPI_STATUS (Status);
421 /*******************************************************************************
423 * FUNCTION: AcpiSetRegister
425 * PARAMETERS: RegisterId - ID of ACPI BitRegister to access
426 * Value - (only used on write) value to write to the
427 * Register, NOT pre-normalized to the bit pos
428 * Flags - Lock the hardware or not
432 * DESCRIPTION: ACPI Bit Register write function.
434 ******************************************************************************/
442 UINT32 RegisterValue = 0;
443 ACPI_BIT_REGISTER_INFO *BitRegInfo;
447 ACPI_FUNCTION_TRACE_U32 ("AcpiSetRegister", RegisterId);
450 /* Get the info structure corresponding to the requested ACPI Register */
452 BitRegInfo = AcpiHwGetBitRegisterInfo (RegisterId);
455 ACPI_REPORT_ERROR (("Bad ACPI HW RegisterId: %X\n", RegisterId));
456 return_ACPI_STATUS (AE_BAD_PARAMETER);
459 if (Flags & ACPI_MTX_LOCK)
461 Status = AcpiUtAcquireMutex (ACPI_MTX_HARDWARE);
462 if (ACPI_FAILURE (Status))
464 return_ACPI_STATUS (Status);
468 /* Always do a register read first so we can insert the new bits */
470 Status = AcpiHwRegisterRead (ACPI_MTX_DO_NOT_LOCK,
471 BitRegInfo->ParentRegister, &RegisterValue);
472 if (ACPI_FAILURE (Status))
478 * Decode the Register ID
479 * Register ID = [Register block ID] | [bit ID]
481 * Check bit ID to fine locate Register offset.
482 * Check Mask to determine Register offset, and then read-write.
484 switch (BitRegInfo->ParentRegister)
486 case ACPI_REGISTER_PM1_STATUS:
489 * Status Registers are different from the rest. Clear by
490 * writing 1, and writing 0 has no effect. So, the only relevant
491 * information is the single bit we're interested in, all others should
492 * be written as 0 so they will be left unchanged.
494 Value = ACPI_REGISTER_PREPARE_BITS (Value,
495 BitRegInfo->BitPosition, BitRegInfo->AccessBitMask);
498 Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK,
499 ACPI_REGISTER_PM1_STATUS, (UINT16) Value);
505 case ACPI_REGISTER_PM1_ENABLE:
507 ACPI_REGISTER_INSERT_VALUE (RegisterValue, BitRegInfo->BitPosition,
508 BitRegInfo->AccessBitMask, Value);
510 Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK,
511 ACPI_REGISTER_PM1_ENABLE, (UINT16) RegisterValue);
515 case ACPI_REGISTER_PM1_CONTROL:
518 * Write the PM1 Control register.
519 * Note that at this level, the fact that there are actually TWO
520 * registers (A and B - and B may not exist) is abstracted.
522 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "PM1 control: Read %X\n", RegisterValue));
524 ACPI_REGISTER_INSERT_VALUE (RegisterValue, BitRegInfo->BitPosition,
525 BitRegInfo->AccessBitMask, Value);
527 Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK,
528 ACPI_REGISTER_PM1_CONTROL, (UINT16) RegisterValue);
532 case ACPI_REGISTER_PM2_CONTROL:
534 Status = AcpiHwRegisterRead (ACPI_MTX_DO_NOT_LOCK,
535 ACPI_REGISTER_PM2_CONTROL, &RegisterValue);
536 if (ACPI_FAILURE (Status))
541 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "PM2 control: Read %X from %8.8X%8.8X\n",
543 ACPI_FORMAT_UINT64 (ACPI_GET_ADDRESS (
544 AcpiGbl_FADT->XPm2CntBlk.Address))));
546 ACPI_REGISTER_INSERT_VALUE (RegisterValue, BitRegInfo->BitPosition,
547 BitRegInfo->AccessBitMask, Value);
549 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "About to write %4.4X to %8.8X%8.8X\n",
551 ACPI_FORMAT_UINT64 (ACPI_GET_ADDRESS (
552 AcpiGbl_FADT->XPm2CntBlk.Address))));
554 Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK,
555 ACPI_REGISTER_PM2_CONTROL, (UINT8) (RegisterValue));
566 if (Flags & ACPI_MTX_LOCK)
568 (void) AcpiUtReleaseMutex (ACPI_MTX_HARDWARE);
571 /* Normalize the value that was read */
573 ACPI_DEBUG_EXEC (RegisterValue =
574 ((RegisterValue & BitRegInfo->AccessBitMask) >>
575 BitRegInfo->BitPosition));
577 ACPI_DEBUG_PRINT ((ACPI_DB_IO, "Set bits: %8.8X actual %8.8X register %X\n",
578 Value, RegisterValue, BitRegInfo->ParentRegister));
579 return_ACPI_STATUS (Status);
583 /******************************************************************************
585 * FUNCTION: AcpiHwRegisterRead
587 * PARAMETERS: UseLock - Mutex hw access
588 * RegisterId - RegisterID + Offset
589 * ReturnValue - Where the register value is returned
591 * RETURN: Status and the value read.
593 * DESCRIPTION: Acpi register read function. Registers are read at the
596 ******************************************************************************/
609 ACPI_FUNCTION_TRACE ("HwRegisterRead");
612 if (ACPI_MTX_LOCK == UseLock)
614 Status = AcpiUtAcquireMutex (ACPI_MTX_HARDWARE);
615 if (ACPI_FAILURE (Status))
617 return_ACPI_STATUS (Status);
623 case ACPI_REGISTER_PM1_STATUS: /* 16-bit access */
625 Status = AcpiHwLowLevelRead (16, &Value1, &AcpiGbl_FADT->XPm1aEvtBlk);
626 if (ACPI_FAILURE (Status))
631 /* PM1B is optional */
633 Status = AcpiHwLowLevelRead (16, &Value2, &AcpiGbl_FADT->XPm1bEvtBlk);
638 case ACPI_REGISTER_PM1_ENABLE: /* 16-bit access */
640 Status = AcpiHwLowLevelRead (16, &Value1, &AcpiGbl_XPm1aEnable);
641 if (ACPI_FAILURE (Status))
646 /* PM1B is optional */
648 Status = AcpiHwLowLevelRead (16, &Value2, &AcpiGbl_XPm1bEnable);
653 case ACPI_REGISTER_PM1_CONTROL: /* 16-bit access */
655 Status = AcpiHwLowLevelRead (16, &Value1, &AcpiGbl_FADT->XPm1aCntBlk);
656 if (ACPI_FAILURE (Status))
661 Status = AcpiHwLowLevelRead (16, &Value2, &AcpiGbl_FADT->XPm1bCntBlk);
666 case ACPI_REGISTER_PM2_CONTROL: /* 8-bit access */
668 Status = AcpiHwLowLevelRead (8, &Value1, &AcpiGbl_FADT->XPm2CntBlk);
672 case ACPI_REGISTER_PM_TIMER: /* 32-bit access */
674 Status = AcpiHwLowLevelRead (32, &Value1, &AcpiGbl_FADT->XPmTmrBlk);
677 case ACPI_REGISTER_SMI_COMMAND_BLOCK: /* 8-bit access */
679 Status = AcpiOsReadPort (AcpiGbl_FADT->SmiCmd, &Value1, 8);
683 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown Register ID: %X\n",
685 Status = AE_BAD_PARAMETER;
690 if (ACPI_MTX_LOCK == UseLock)
692 (void) AcpiUtReleaseMutex (ACPI_MTX_HARDWARE);
695 if (ACPI_SUCCESS (Status))
697 *ReturnValue = Value1;
700 return_ACPI_STATUS (Status);
704 /******************************************************************************
706 * FUNCTION: AcpiHwRegisterWrite
708 * PARAMETERS: UseLock - Mutex hw access
709 * RegisterId - RegisterID + Offset
710 * Value - The value to write
714 * DESCRIPTION: Acpi register Write function. Registers are written at the
717 ******************************************************************************/
720 AcpiHwRegisterWrite (
728 ACPI_FUNCTION_TRACE ("HwRegisterWrite");
731 if (ACPI_MTX_LOCK == UseLock)
733 Status = AcpiUtAcquireMutex (ACPI_MTX_HARDWARE);
734 if (ACPI_FAILURE (Status))
736 return_ACPI_STATUS (Status);
742 case ACPI_REGISTER_PM1_STATUS: /* 16-bit access */
744 Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1aEvtBlk);
745 if (ACPI_FAILURE (Status))
750 /* PM1B is optional */
752 Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1bEvtBlk);
756 case ACPI_REGISTER_PM1_ENABLE: /* 16-bit access*/
758 Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_XPm1aEnable);
759 if (ACPI_FAILURE (Status))
764 /* PM1B is optional */
766 Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_XPm1bEnable);
770 case ACPI_REGISTER_PM1_CONTROL: /* 16-bit access */
772 Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1aCntBlk);
773 if (ACPI_FAILURE (Status))
778 Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1bCntBlk);
782 case ACPI_REGISTER_PM1A_CONTROL: /* 16-bit access */
784 Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1aCntBlk);
788 case ACPI_REGISTER_PM1B_CONTROL: /* 16-bit access */
790 Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT->XPm1bCntBlk);
794 case ACPI_REGISTER_PM2_CONTROL: /* 8-bit access */
796 Status = AcpiHwLowLevelWrite (8, Value, &AcpiGbl_FADT->XPm2CntBlk);
800 case ACPI_REGISTER_PM_TIMER: /* 32-bit access */
802 Status = AcpiHwLowLevelWrite (32, Value, &AcpiGbl_FADT->XPmTmrBlk);
806 case ACPI_REGISTER_SMI_COMMAND_BLOCK: /* 8-bit access */
808 /* SMI_CMD is currently always in IO space */
810 Status = AcpiOsWritePort (AcpiGbl_FADT->SmiCmd, Value, 8);
815 Status = AE_BAD_PARAMETER;
820 if (ACPI_MTX_LOCK == UseLock)
822 (void) AcpiUtReleaseMutex (ACPI_MTX_HARDWARE);
825 return_ACPI_STATUS (Status);
829 /******************************************************************************
831 * FUNCTION: AcpiHwLowLevelRead
833 * PARAMETERS: Width - 8, 16, or 32
834 * Value - Where the value is returned
835 * Reg - GAS register structure
839 * DESCRIPTION: Read from either memory or IO space.
841 ******************************************************************************/
847 ACPI_GENERIC_ADDRESS *Reg)
853 ACPI_FUNCTION_NAME ("HwLowLevelRead");
857 * Must have a valid pointer to a GAS structure, and
858 * a non-zero address within. However, don't return an error
859 * because the PM1A/B code must not fail if B isn't present.
866 /* Get a local copy of the address. Handles possible alignment issues */
868 ACPI_MOVE_64_TO_64 (&Address, &Reg->Address);
869 if (!ACPI_VALID_ADDRESS (Address))
876 * Two address spaces supported: Memory or IO.
877 * PCI_Config is not supported here because the GAS struct is insufficient
879 switch (Reg->AddressSpaceId)
881 case ACPI_ADR_SPACE_SYSTEM_MEMORY:
883 Status = AcpiOsReadMemory (
884 (ACPI_PHYSICAL_ADDRESS) ACPI_GET_ADDRESS (Address),
889 case ACPI_ADR_SPACE_SYSTEM_IO:
891 Status = AcpiOsReadPort ((ACPI_IO_ADDRESS) ACPI_GET_ADDRESS (Address),
897 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
898 "Unsupported address space: %X\n", Reg->AddressSpaceId));
899 return (AE_BAD_PARAMETER);
902 ACPI_DEBUG_PRINT ((ACPI_DB_IO,
903 "Read: %8.8X width %2d from %8.8X%8.8X (%s)\n",
905 ACPI_FORMAT_UINT64 (ACPI_GET_ADDRESS (Address)),
906 AcpiUtGetRegionName (Reg->AddressSpaceId)));
912 /******************************************************************************
914 * FUNCTION: AcpiHwLowLevelWrite
916 * PARAMETERS: Width - 8, 16, or 32
917 * Value - To be written
918 * Reg - GAS register structure
922 * DESCRIPTION: Write to either memory or IO space.
924 ******************************************************************************/
927 AcpiHwLowLevelWrite (
930 ACPI_GENERIC_ADDRESS *Reg)
936 ACPI_FUNCTION_NAME ("HwLowLevelWrite");
940 * Must have a valid pointer to a GAS structure, and
941 * a non-zero address within. However, don't return an error
942 * because the PM1A/B code must not fail if B isn't present.
949 /* Get a local copy of the address. Handles possible alignment issues */
951 ACPI_MOVE_64_TO_64 (&Address, &Reg->Address);
952 if (!ACPI_VALID_ADDRESS (Address))
958 * Two address spaces supported: Memory or IO.
959 * PCI_Config is not supported here because the GAS struct is insufficient
961 switch (Reg->AddressSpaceId)
963 case ACPI_ADR_SPACE_SYSTEM_MEMORY:
965 Status = AcpiOsWriteMemory (
966 (ACPI_PHYSICAL_ADDRESS) ACPI_GET_ADDRESS (Address),
971 case ACPI_ADR_SPACE_SYSTEM_IO:
973 Status = AcpiOsWritePort ((ACPI_IO_ADDRESS) ACPI_GET_ADDRESS (Address),
979 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
980 "Unsupported address space: %X\n", Reg->AddressSpaceId));
981 return (AE_BAD_PARAMETER);
984 ACPI_DEBUG_PRINT ((ACPI_DB_IO,
985 "Wrote: %8.8X width %2d to %8.8X%8.8X (%s)\n",
987 ACPI_FORMAT_UINT64 (ACPI_GET_ADDRESS (Address)),
988 AcpiUtGetRegionName (Reg->AddressSpaceId)));