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minix/drivers/acpi/utilities/utresrc.c
Tomas Hruby 9560b6dea8 ACPI driver 
- 99% of the code is Intel's ACPICA. The license is compliant with BSD
  and GNU and virtually all systems that use ACPI use this code, For
  instance it is part of the Linux kernel.

- The only minix specific files are

  acpi.c
  osminixxf.c
  platform/acminix.h

  and

  include/minix/acpi.h

- At the moment the driver does not register interrupt hooks which I
  believe is mainly for handling PnP, events like "battery level is
  low" and power management. Should not be difficult to add it if need
  be.

- The interface to the outside world is virtually non-existent except
  a trivial message based service for PCI driver to query which device
  is connected to what IRQ line. This will evolve as more components
  start using this driver. VM, Scheduler and IOMMU are the possible
  users right now.

- because of dependency on a native 64bit (long long, part of c99) it
  is compiled only with a gnu-like compilers which in case of Minix
  includes gcc llvm-gcc and clang
2010-09-02 15:44:04 +00:00

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/*******************************************************************************
*
* Module Name: utresrc - Resource managment utilities
*
******************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2010, Intel Corp.
* All rights reserved.
*
* 2. License
*
* 2.1. This is your license from Intel Corp. under its intellectual property
* rights. You may have additional license terms from the party that provided
* you this software, covering your right to use that party's intellectual
* property rights.
*
* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
* copy of the source code appearing in this file ("Covered Code") an
* irrevocable, perpetual, worldwide license under Intel's copyrights in the
* base code distributed originally by Intel ("Original Intel Code") to copy,
* make derivatives, distribute, use and display any portion of the Covered
* Code in any form, with the right to sublicense such rights; and
*
* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
* license (with the right to sublicense), under only those claims of Intel
* patents that are infringed by the Original Intel Code, to make, use, sell,
* offer to sell, and import the Covered Code and derivative works thereof
* solely to the minimum extent necessary to exercise the above copyright
* license, and in no event shall the patent license extend to any additions
* to or modifications of the Original Intel Code. No other license or right
* is granted directly or by implication, estoppel or otherwise;
*
* The above copyright and patent license is granted only if the following
* conditions are met:
*
* 3. Conditions
*
* 3.1. Redistribution of Source with Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification with rights to further distribute source must include
* the above Copyright Notice, the above License, this list of Conditions,
* and the following Disclaimer and Export Compliance provision. In addition,
* Licensee must cause all Covered Code to which Licensee contributes to
* contain a file documenting the changes Licensee made to create that Covered
* Code and the date of any change. Licensee must include in that file the
* documentation of any changes made by any predecessor Licensee. Licensee
* must include a prominent statement that the modification is derived,
* directly or indirectly, from Original Intel Code.
*
* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification without rights to further distribute source must
* include the following Disclaimer and Export Compliance provision in the
* documentation and/or other materials provided with distribution. In
* addition, Licensee may not authorize further sublicense of source of any
* portion of the Covered Code, and must include terms to the effect that the
* license from Licensee to its licensee is limited to the intellectual
* property embodied in the software Licensee provides to its licensee, and
* not to intellectual property embodied in modifications its licensee may
* make.
*
* 3.3. Redistribution of Executable. Redistribution in executable form of any
* substantial portion of the Covered Code or modification must reproduce the
* above Copyright Notice, and the following Disclaimer and Export Compliance
* provision in the documentation and/or other materials provided with the
* distribution.
*
* 3.4. Intel retains all right, title, and interest in and to the Original
* Intel Code.
*
* 3.5. Neither the name Intel nor any other trademark owned or controlled by
* Intel shall be used in advertising or otherwise to promote the sale, use or
* other dealings in products derived from or relating to the Covered Code
* without prior written authorization from Intel.
*
* 4. Disclaimer and Export Compliance
*
* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
* PARTICULAR PURPOSE.
*
* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
* LIMITED REMEDY.
*
* 4.3. Licensee shall not export, either directly or indirectly, any of this
* software or system incorporating such software without first obtaining any
* required license or other approval from the U. S. Department of Commerce or
* any other agency or department of the United States Government. In the
* event Licensee exports any such software from the United States or
* re-exports any such software from a foreign destination, Licensee shall
* ensure that the distribution and export/re-export of the software is in
* compliance with all laws, regulations, orders, or other restrictions of the
* U.S. Export Administration Regulations. Licensee agrees that neither it nor
* any of its subsidiaries will export/re-export any technical data, process,
* software, or service, directly or indirectly, to any country for which the
* United States government or any agency thereof requires an export license,
* other governmental approval, or letter of assurance, without first obtaining
* such license, approval or letter.
*
*****************************************************************************/
#define __UTRESRC_C__
#include "acpi.h"
#include "accommon.h"
#include "amlresrc.h"
#define _COMPONENT ACPI_UTILITIES
ACPI_MODULE_NAME ("utresrc")
#if defined(ACPI_DISASSEMBLER) || defined (ACPI_DEBUGGER)
/*
* Strings used to decode resource descriptors.
* Used by both the disasssembler and the debugger resource dump routines
*/
const char *AcpiGbl_BmDecode[] =
{
"NotBusMaster",
"BusMaster"
};
const char *AcpiGbl_ConfigDecode[] =
{
"0 - Good Configuration",
"1 - Acceptable Configuration",
"2 - Suboptimal Configuration",
"3 - ***Invalid Configuration***",
};
const char *AcpiGbl_ConsumeDecode[] =
{
"ResourceProducer",
"ResourceConsumer"
};
const char *AcpiGbl_DecDecode[] =
{
"PosDecode",
"SubDecode"
};
const char *AcpiGbl_HeDecode[] =
{
"Level",
"Edge"
};
const char *AcpiGbl_IoDecode[] =
{
"Decode10",
"Decode16"
};
const char *AcpiGbl_LlDecode[] =
{
"ActiveHigh",
"ActiveLow"
};
const char *AcpiGbl_MaxDecode[] =
{
"MaxNotFixed",
"MaxFixed"
};
const char *AcpiGbl_MemDecode[] =
{
"NonCacheable",
"Cacheable",
"WriteCombining",
"Prefetchable"
};
const char *AcpiGbl_MinDecode[] =
{
"MinNotFixed",
"MinFixed"
};
const char *AcpiGbl_MtpDecode[] =
{
"AddressRangeMemory",
"AddressRangeReserved",
"AddressRangeACPI",
"AddressRangeNVS"
};
const char *AcpiGbl_RngDecode[] =
{
"InvalidRanges",
"NonISAOnlyRanges",
"ISAOnlyRanges",
"EntireRange"
};
const char *AcpiGbl_RwDecode[] =
{
"ReadOnly",
"ReadWrite"
};
const char *AcpiGbl_ShrDecode[] =
{
"Exclusive",
"Shared"
};
const char *AcpiGbl_SizDecode[] =
{
"Transfer8",
"Transfer8_16",
"Transfer16",
"InvalidSize"
};
const char *AcpiGbl_TrsDecode[] =
{
"DenseTranslation",
"SparseTranslation"
};
const char *AcpiGbl_TtpDecode[] =
{
"TypeStatic",
"TypeTranslation"
};
const char *AcpiGbl_TypDecode[] =
{
"Compatibility",
"TypeA",
"TypeB",
"TypeF"
};
#endif
/*
* Base sizes of the raw AML resource descriptors, indexed by resource type.
* Zero indicates a reserved (and therefore invalid) resource type.
*/
const UINT8 AcpiGbl_ResourceAmlSizes[] =
{
/* Small descriptors */
0,
0,
0,
0,
ACPI_AML_SIZE_SMALL (AML_RESOURCE_IRQ),
ACPI_AML_SIZE_SMALL (AML_RESOURCE_DMA),
ACPI_AML_SIZE_SMALL (AML_RESOURCE_START_DEPENDENT),
ACPI_AML_SIZE_SMALL (AML_RESOURCE_END_DEPENDENT),
ACPI_AML_SIZE_SMALL (AML_RESOURCE_IO),
ACPI_AML_SIZE_SMALL (AML_RESOURCE_FIXED_IO),
0,
0,
0,
0,
ACPI_AML_SIZE_SMALL (AML_RESOURCE_VENDOR_SMALL),
ACPI_AML_SIZE_SMALL (AML_RESOURCE_END_TAG),
/* Large descriptors */
0,
ACPI_AML_SIZE_LARGE (AML_RESOURCE_MEMORY24),
ACPI_AML_SIZE_LARGE (AML_RESOURCE_GENERIC_REGISTER),
0,
ACPI_AML_SIZE_LARGE (AML_RESOURCE_VENDOR_LARGE),
ACPI_AML_SIZE_LARGE (AML_RESOURCE_MEMORY32),
ACPI_AML_SIZE_LARGE (AML_RESOURCE_FIXED_MEMORY32),
ACPI_AML_SIZE_LARGE (AML_RESOURCE_ADDRESS32),
ACPI_AML_SIZE_LARGE (AML_RESOURCE_ADDRESS16),
ACPI_AML_SIZE_LARGE (AML_RESOURCE_EXTENDED_IRQ),
ACPI_AML_SIZE_LARGE (AML_RESOURCE_ADDRESS64),
ACPI_AML_SIZE_LARGE (AML_RESOURCE_EXTENDED_ADDRESS64)
};
/*
* Resource types, used to validate the resource length field.
* The length of fixed-length types must match exactly, variable
* lengths must meet the minimum required length, etc.
* Zero indicates a reserved (and therefore invalid) resource type.
*/
static const UINT8 AcpiGbl_ResourceTypes[] =
{
/* Small descriptors */
0,
0,
0,
0,
ACPI_SMALL_VARIABLE_LENGTH,
ACPI_FIXED_LENGTH,
ACPI_SMALL_VARIABLE_LENGTH,
ACPI_FIXED_LENGTH,
ACPI_FIXED_LENGTH,
ACPI_FIXED_LENGTH,
0,
0,
0,
0,
ACPI_VARIABLE_LENGTH,
ACPI_FIXED_LENGTH,
/* Large descriptors */
0,
ACPI_FIXED_LENGTH,
ACPI_FIXED_LENGTH,
0,
ACPI_VARIABLE_LENGTH,
ACPI_FIXED_LENGTH,
ACPI_FIXED_LENGTH,
ACPI_VARIABLE_LENGTH,
ACPI_VARIABLE_LENGTH,
ACPI_VARIABLE_LENGTH,
ACPI_VARIABLE_LENGTH,
ACPI_FIXED_LENGTH
};
/*******************************************************************************
*
* FUNCTION: AcpiUtWalkAmlResources
*
* PARAMETERS: Aml - Pointer to the raw AML resource template
* AmlLength - Length of the entire template
* UserFunction - Called once for each descriptor found. If
* NULL, a pointer to the EndTag is returned
* Context - Passed to UserFunction
*
* RETURN: Status
*
* DESCRIPTION: Walk a raw AML resource list(buffer). User function called
* once for each resource found.
*
******************************************************************************/
ACPI_STATUS
AcpiUtWalkAmlResources (
UINT8 *Aml,
ACPI_SIZE AmlLength,
ACPI_WALK_AML_CALLBACK UserFunction,
void *Context)
{
ACPI_STATUS Status;
UINT8 *EndAml;
UINT8 ResourceIndex;
UINT32 Length;
UINT32 Offset = 0;
ACPI_FUNCTION_TRACE (UtWalkAmlResources);
/* The absolute minimum resource template is one EndTag descriptor */
if (AmlLength < sizeof (AML_RESOURCE_END_TAG))
{
return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG);
}
/* Point to the end of the resource template buffer */
EndAml = Aml + AmlLength;
/* Walk the byte list, abort on any invalid descriptor type or length */
while (Aml < EndAml)
{
/* Validate the Resource Type and Resource Length */
Status = AcpiUtValidateResource (Aml, &ResourceIndex);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Get the length of this descriptor */
Length = AcpiUtGetDescriptorLength (Aml);
/* Invoke the user function */
if (UserFunction)
{
Status = UserFunction (Aml, Length, Offset, ResourceIndex, Context);
if (ACPI_FAILURE (Status))
{
return (Status);
}
}
/* An EndTag descriptor terminates this resource template */
if (AcpiUtGetResourceType (Aml) == ACPI_RESOURCE_NAME_END_TAG)
{
/*
* There must be at least one more byte in the buffer for
* the 2nd byte of the EndTag
*/
if ((Aml + 1) >= EndAml)
{
return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG);
}
/* Return the pointer to the EndTag if requested */
if (!UserFunction)
{
*(void **) Context = Aml;
}
/* Normal exit */
return_ACPI_STATUS (AE_OK);
}
Aml += Length;
Offset += Length;
}
/* Did not find an EndTag descriptor */
return (AE_AML_NO_RESOURCE_END_TAG);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtValidateResource
*
* PARAMETERS: Aml - Pointer to the raw AML resource descriptor
* ReturnIndex - Where the resource index is returned. NULL
* if the index is not required.
*
* RETURN: Status, and optionally the Index into the global resource tables
*
* DESCRIPTION: Validate an AML resource descriptor by checking the Resource
* Type and Resource Length. Returns an index into the global
* resource information/dispatch tables for later use.
*
******************************************************************************/
ACPI_STATUS
AcpiUtValidateResource (
void *Aml,
UINT8 *ReturnIndex)
{
UINT8 ResourceType;
UINT8 ResourceIndex;
ACPI_RS_LENGTH ResourceLength;
ACPI_RS_LENGTH MinimumResourceLength;
ACPI_FUNCTION_ENTRY ();
/*
* 1) Validate the ResourceType field (Byte 0)
*/
ResourceType = ACPI_GET8 (Aml);
/*
* Byte 0 contains the descriptor name (Resource Type)
* Examine the large/small bit in the resource header
*/
if (ResourceType & ACPI_RESOURCE_NAME_LARGE)
{
/* Verify the large resource type (name) against the max */
if (ResourceType > ACPI_RESOURCE_NAME_LARGE_MAX)
{
return (AE_AML_INVALID_RESOURCE_TYPE);
}
/*
* Large Resource Type -- bits 6:0 contain the name
* Translate range 0x80-0x8B to index range 0x10-0x1B
*/
ResourceIndex = (UINT8) (ResourceType - 0x70);
}
else
{
/*
* Small Resource Type -- bits 6:3 contain the name
* Shift range to index range 0x00-0x0F
*/
ResourceIndex = (UINT8)
((ResourceType & ACPI_RESOURCE_NAME_SMALL_MASK) >> 3);
}
/* Check validity of the resource type, zero indicates name is invalid */
if (!AcpiGbl_ResourceTypes[ResourceIndex])
{
return (AE_AML_INVALID_RESOURCE_TYPE);
}
/*
* 2) Validate the ResourceLength field. This ensures that the length
* is at least reasonable, and guarantees that it is non-zero.
*/
ResourceLength = AcpiUtGetResourceLength (Aml);
MinimumResourceLength = AcpiGbl_ResourceAmlSizes[ResourceIndex];
/* Validate based upon the type of resource - fixed length or variable */
switch (AcpiGbl_ResourceTypes[ResourceIndex])
{
case ACPI_FIXED_LENGTH:
/* Fixed length resource, length must match exactly */
if (ResourceLength != MinimumResourceLength)
{
return (AE_AML_BAD_RESOURCE_LENGTH);
}
break;
case ACPI_VARIABLE_LENGTH:
/* Variable length resource, length must be at least the minimum */
if (ResourceLength < MinimumResourceLength)
{
return (AE_AML_BAD_RESOURCE_LENGTH);
}
break;
case ACPI_SMALL_VARIABLE_LENGTH:
/* Small variable length resource, length can be (Min) or (Min-1) */
if ((ResourceLength > MinimumResourceLength) ||
(ResourceLength < (MinimumResourceLength - 1)))
{
return (AE_AML_BAD_RESOURCE_LENGTH);
}
break;
default:
/* Shouldn't happen (because of validation earlier), but be sure */
return (AE_AML_INVALID_RESOURCE_TYPE);
}
/* Optionally return the resource table index */
if (ReturnIndex)
{
*ReturnIndex = ResourceIndex;
}
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtGetResourceType
*
* PARAMETERS: Aml - Pointer to the raw AML resource descriptor
*
* RETURN: The Resource Type with no extraneous bits (except the
* Large/Small descriptor bit -- this is left alone)
*
* DESCRIPTION: Extract the Resource Type/Name from the first byte of
* a resource descriptor.
*
******************************************************************************/
UINT8
AcpiUtGetResourceType (
void *Aml)
{
ACPI_FUNCTION_ENTRY ();
/*
* Byte 0 contains the descriptor name (Resource Type)
* Examine the large/small bit in the resource header
*/
if (ACPI_GET8 (Aml) & ACPI_RESOURCE_NAME_LARGE)
{
/* Large Resource Type -- bits 6:0 contain the name */
return (ACPI_GET8 (Aml));
}
else
{
/* Small Resource Type -- bits 6:3 contain the name */
return ((UINT8) (ACPI_GET8 (Aml) & ACPI_RESOURCE_NAME_SMALL_MASK));
}
}
/*******************************************************************************
*
* FUNCTION: AcpiUtGetResourceLength
*
* PARAMETERS: Aml - Pointer to the raw AML resource descriptor
*
* RETURN: Byte Length
*
* DESCRIPTION: Get the "Resource Length" of a raw AML descriptor. By
* definition, this does not include the size of the descriptor
* header or the length field itself.
*
******************************************************************************/
UINT16
AcpiUtGetResourceLength (
void *Aml)
{
ACPI_RS_LENGTH ResourceLength;
ACPI_FUNCTION_ENTRY ();
/*
* Byte 0 contains the descriptor name (Resource Type)
* Examine the large/small bit in the resource header
*/
if (ACPI_GET8 (Aml) & ACPI_RESOURCE_NAME_LARGE)
{
/* Large Resource type -- bytes 1-2 contain the 16-bit length */
ACPI_MOVE_16_TO_16 (&ResourceLength, ACPI_ADD_PTR (UINT8, Aml, 1));
}
else
{
/* Small Resource type -- bits 2:0 of byte 0 contain the length */
ResourceLength = (UINT16) (ACPI_GET8 (Aml) &
ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK);
}
return (ResourceLength);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtGetResourceHeaderLength
*
* PARAMETERS: Aml - Pointer to the raw AML resource descriptor
*
* RETURN: Length of the AML header (depends on large/small descriptor)
*
* DESCRIPTION: Get the length of the header for this resource.
*
******************************************************************************/
UINT8
AcpiUtGetResourceHeaderLength (
void *Aml)
{
ACPI_FUNCTION_ENTRY ();
/* Examine the large/small bit in the resource header */
if (ACPI_GET8 (Aml) & ACPI_RESOURCE_NAME_LARGE)
{
return (sizeof (AML_RESOURCE_LARGE_HEADER));
}
else
{
return (sizeof (AML_RESOURCE_SMALL_HEADER));
}
}
/*******************************************************************************
*
* FUNCTION: AcpiUtGetDescriptorLength
*
* PARAMETERS: Aml - Pointer to the raw AML resource descriptor
*
* RETURN: Byte length
*
* DESCRIPTION: Get the total byte length of a raw AML descriptor, including the
* length of the descriptor header and the length field itself.
* Used to walk descriptor lists.
*
******************************************************************************/
UINT32
AcpiUtGetDescriptorLength (
void *Aml)
{
ACPI_FUNCTION_ENTRY ();
/*
* Get the Resource Length (does not include header length) and add
* the header length (depends on if this is a small or large resource)
*/
return (AcpiUtGetResourceLength (Aml) +
AcpiUtGetResourceHeaderLength (Aml));
}
/*******************************************************************************
*
* FUNCTION: AcpiUtGetResourceEndTag
*
* PARAMETERS: ObjDesc - The resource template buffer object
* EndTag - Where the pointer to the EndTag is returned
*
* RETURN: Status, pointer to the end tag
*
* DESCRIPTION: Find the EndTag resource descriptor in an AML resource template
* Note: allows a buffer length of zero.
*
******************************************************************************/
ACPI_STATUS
AcpiUtGetResourceEndTag (
ACPI_OPERAND_OBJECT *ObjDesc,
UINT8 **EndTag)
{
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (UtGetResourceEndTag);
/* Allow a buffer length of zero */
if (!ObjDesc->Buffer.Length)
{
*EndTag = ObjDesc->Buffer.Pointer;
return_ACPI_STATUS (AE_OK);
}
/* Validate the template and get a pointer to the EndTag */
Status = AcpiUtWalkAmlResources (ObjDesc->Buffer.Pointer,
ObjDesc->Buffer.Length, NULL, EndTag);
return_ACPI_STATUS (Status);
}
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