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windows-nt/Source/XPSP1/NT/base/hals/rangesup.c

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/*++
Copyright (c) 1991 Microsoft Corporation
All rights reserved
Module Name:
rangesup.c
Abstract:
Supplies support function for dealing with SUPPORTED_RANGEs.
Author:
Ken Reneris (kenr) March-27-1995
Environment:
Kernel mode only.
Revision History:
*/
#include "halp.h"
#define STATIC
STATIC ULONG
HalpSortRanges (
IN PSUPPORTED_RANGE pRange1
);
typedef struct tagNRParams {
PIO_RESOURCE_DESCRIPTOR InDesc;
PIO_RESOURCE_DESCRIPTOR OutDesc;
PSUPPORTED_RANGE CurrentPosition;
LONGLONG Base;
LONGLONG Limit;
UCHAR DescOpt;
BOOLEAN AnotherListPending;
} NRPARAMS, *PNRPARAMS;
STATIC PIO_RESOURCE_DESCRIPTOR
HalpGetNextSupportedRange (
IN LONGLONG MinimumAddress,
IN LONGLONG MaximumAddress,
IN OUT PNRPARAMS PNRParams
);
//
// These following functions are usable at to initialize
// the supported_ranges information for a bus handler.
// HalpMergeRanges - merges two bus supported ranges
// HalpMergeRangeList - merges two single supported ranges lists
// HalpCopyRanges - copy a bus supported ranges to a new supported ranges structure
// HalpAddRangeList - adds a supported range list to another
// HalpAddRange - adds a single range to a supported range list
// HalpRemoveRanges - removes all ranges from one buses supported ranges from another
// HalpRemoveRangeList - removes all ranges in one supported range list from another
// HalpRemoveRange - removes a single range from a supported range list
// HalpAllocateNewRangeList - allocates a new, "blank" bus supported ranges structure
// HalpFreeRangeList - frees an entire bus supported ranges
//
// HalpConsolidateRanges - cleans up a supported ranges structure to be ready for usage
//
//
// These functions are used to intersect a buses supported ranges
// to an IO_RESOURCE_REQUIREMENTS_LIST:
// HaliAdjustResourceListRange
//
// These functions are used internal to this module:
// HalpSortRanges
// HalpGetNextSupportedRange
//
#ifdef ALLOC_PRAGMA
#pragma alloc_text(INIT,HalpMergeRanges)
#pragma alloc_text(INIT,HalpMergeRangeList)
#pragma alloc_text(INIT,HalpCopyRanges)
#pragma alloc_text(INIT,HalpAddRangeList)
#pragma alloc_text(INIT,HalpAddRange)
#pragma alloc_text(INIT,HalpRemoveRanges)
#pragma alloc_text(INIT,HalpRemoveRangeList)
#pragma alloc_text(INIT,HalpRemoveRange)
#pragma alloc_text(INIT,HalpConsolidateRanges)
#pragma alloc_text(PAGE,HalpAllocateNewRangeList)
#pragma alloc_text(PAGE,HalpFreeRangeList)
#pragma alloc_text(PAGE,HaliAdjustResourceListRange)
#pragma alloc_text(PAGE,HalpSortRanges)
#pragma alloc_text(PAGE,HalpGetNextSupportedRange)
#endif
#ifdef ALLOC_DATA_PRAGMA
#pragma const_seg("PAGECONST")
#endif
struct {
ULONG Offset;
} const HalpRangeList[] = {
FIELD_OFFSET (SUPPORTED_RANGES, IO),
FIELD_OFFSET (SUPPORTED_RANGES, Memory),
FIELD_OFFSET (SUPPORTED_RANGES, PrefetchMemory),
FIELD_OFFSET (SUPPORTED_RANGES, Dma),
0,
};
#ifdef ALLOC_DATA_PRAGMA
#pragma const_seg()
#endif
#define RANGE_LIST(a,i) ((PSUPPORTED_RANGE) ((PUCHAR) a + HalpRangeList[i].Offset))
PSUPPORTED_RANGES
HalpMergeRanges (
IN PSUPPORTED_RANGES Parent,
IN PSUPPORTED_RANGES Child
)
/*++
Routine Description:
This function produces a NewList which is a subset of all overlapping
ranges in Parent and Child for all range lists.
The resulting SystemBaseAddresses and SystemAddressSpaces are taken
from the Child supported ranges.
Note: Resulting list needs consolidated
--*/
{
PSUPPORTED_RANGES NewList;
PSUPPORTED_RANGES List1;
NewList = HalpAllocateNewRangeList();
HalpMergeRangeList (&NewList->IO, &Parent->IO, &Child->IO);
HalpMergeRangeList (&NewList->Dma, &Parent->Dma, &Child->Dma);
HalpMergeRangeList (&NewList->Memory, &Parent->Memory, &Child->Memory);
List1 = HalpAllocateNewRangeList();
HalpAddRangeList (&List1->Memory, &Parent->Memory);
HalpAddRangeList (&List1->Memory, &Parent->PrefetchMemory);
HalpMergeRangeList (&NewList->PrefetchMemory, &List1->Memory, &Child->PrefetchMemory);
HalpFreeRangeList (List1);
return NewList;
}
VOID
HalpMergeRangeList (
OUT PSUPPORTED_RANGE NewList,
IN PSUPPORTED_RANGE Parent,
IN PSUPPORTED_RANGE Child
)
/*++
Routine Description:
Completes NewList to be a subset of all overlapping
ranges in the Parent and Child list.
The resulting SystemBaseAddresses and SystemAddressSpaces are
taken from the Child supported ranges.
Note: Resulting list needs consolidated
--*/
{
BOOLEAN HeadCompleted;
PSUPPORTED_RANGE List1, List2;
LONGLONG Base, Limit;
HeadCompleted = FALSE;
for (List1 = Parent; List1; List1 = List1->Next) {
for (List2 = Child; List2; List2 = List2->Next) {
Base = List1->Base;
Limit = List1->Limit;
//
// Clip to range supported by List2
//
if (Base < List2->Base) {
Base = List2->Base;
}
if (Limit > List2->Limit) {
Limit = List2->Limit;
}
//
// If valid range, add it
//
if (Base <= Limit) {
if (HeadCompleted) {
NewList->Next = ExAllocatePoolWithTag (
SPRANGEPOOL,
sizeof (SUPPORTED_RANGE),
HAL_POOL_TAG
);
RtlZeroMemory (NewList->Next, sizeof (SUPPORTED_RANGE));
NewList = NewList->Next;
NewList->Next = NULL;
}
HeadCompleted = TRUE;
NewList->Base = Base;
NewList->Limit = Limit;
NewList->SystemBase = List2->SystemBase;
NewList->SystemAddressSpace = List2->SystemAddressSpace;
}
}
}
}
PSUPPORTED_RANGES
HalpCopyRanges (
PSUPPORTED_RANGES Source
)
/*++
Routine Description:
Builds a copy of the Source list to the destination list.
Note that an invalid entry lands at the begining of the copy, but
that's OK - it will be pulled out at consolidation time.
Note: Resulting list needs consolidated
--*/
{
PSUPPORTED_RANGES Dest;
ULONG i;
Dest = HalpAllocateNewRangeList ();
for (i=0; HalpRangeList[i].Offset; i++) {
HalpAddRangeList (RANGE_LIST(Dest, i), RANGE_LIST(Source, i));
}
return Dest;
}
VOID
HalpAddRangeList (
IN OUT PSUPPORTED_RANGE DRange,
OUT PSUPPORTED_RANGE SRange
)
/*++
Routine Description:
Adds ranges from SRange to DRange.
--*/
{
while (SRange) {
HalpAddRange (
DRange,
SRange->SystemAddressSpace,
SRange->SystemBase,
SRange->Base,
SRange->Limit
);
SRange = SRange->Next;
}
}
VOID
HalpAddRange (
PSUPPORTED_RANGE HRange,
ULONG AddressSpace,
LONGLONG SystemBase,
LONGLONG Base,
LONGLONG Limit
)
/*++
Routine Description:
Adds a range to the supported list. Here we just add the range, if it's
a duplicate it will be removed later at consolidation time.
--*/
{
PSUPPORTED_RANGE Range;
Range = ExAllocatePoolWithTag (
SPRANGEPOOL,
sizeof (SUPPORTED_RANGE),
HAL_POOL_TAG
);
RtlZeroMemory (Range, sizeof (SUPPORTED_RANGE));
Range->Next = HRange->Next;
HRange->Next = Range;
Range->Base = Base;
Range->Limit = Limit;
Range->SystemBase = SystemBase;
Range->SystemAddressSpace = AddressSpace;
}
VOID
HalpRemoveRanges (
IN OUT PSUPPORTED_RANGES Minuend,
IN PSUPPORTED_RANGES Subtrahend
)
/*++
Routine Description:
Returns a list where all ranges from Subtrahend are removed from Minuend.
Note: Resulting list needs consolidated
--*/
{
HalpRemoveRangeList (&Minuend->IO, &Subtrahend->IO);
HalpRemoveRangeList (&Minuend->Dma, &Subtrahend->Dma);
HalpRemoveRangeList (&Minuend->Memory, &Subtrahend->Memory);
HalpRemoveRangeList (&Minuend->Memory, &Subtrahend->PrefetchMemory);
HalpRemoveRangeList (&Minuend->PrefetchMemory, &Subtrahend->PrefetchMemory);
HalpRemoveRangeList (&Minuend->PrefetchMemory, &Subtrahend->Memory);
}
VOID
HalpRemoveRangeList (
IN OUT PSUPPORTED_RANGE Minuend,
IN PSUPPORTED_RANGE Subtrahend
)
/*++
Routine Description:
Removes all ranges from Subtrahend from Minuend
ranges in Source1 and Source1 list
--*/
{
while (Subtrahend) {
HalpRemoveRange (
Minuend,
Subtrahend->Base,
Subtrahend->Limit
);
Subtrahend = Subtrahend->Next;
}
}
VOID
HalpRemoveRange (
PSUPPORTED_RANGE HRange,
LONGLONG Base,
LONGLONG Limit
)
/*++
Routine Description:
Removes the range Base-Limit from the the HRange list
Note: The returned list needs consolidated, as some entries
may be turned into "null ranges".
--*/
{
PSUPPORTED_RANGE Range;
//
// If range isn't a range at all, then nothing to remove
//
if (Limit < Base) {
return ;
}
//
// Clip any area not to include this range
//
for (Range = HRange; Range; Range = Range->Next) {
if (Range->Limit < Range->Base) {
continue;
}
if (Range->Base < Base) {
if (Range->Limit >= Base && Range->Limit <= Limit) {
// truncate
Range->Limit = Base - 1;
}
if (Range->Limit > Limit) {
//
// Target area is contained totally within this area.
// Split into two ranges
//
HalpAddRange (
HRange,
Range->SystemAddressSpace,
Range->SystemBase,
Limit + 1,
Range->Limit
);
Range->Limit = Base - 1;
}
} else {
// Range->Base >= Base
if (Range->Base <= Limit) {
if (Range->Limit <= Limit) {
//
// This range is totally within the target area. Remove it.
// (make it invalid - it will get remove when colsolidated)
//
Range->Base = 1;
Range->Limit = 0;
} else {
// Bump begining
Range->Base = Limit + 1;
}
}
}
}
}
PSUPPORTED_RANGES
HalpConsolidateRanges (
IN OUT PSUPPORTED_RANGES Ranges
)
/*++
Routine Description:
Cleans the Range list. Consolidates overlapping ranges, removes
ranges which don't have any size, etc...
The returned Ranges list is a clean as possible, and is now ready
to be used.
--*/
{
PSUPPORTED_RANGE RangeList, List1, List2;
LONGLONG Base, Limit, SystemBase;
ULONG i, AddressSpace;
LONGLONG l;
ASSERT (Ranges != NULL);
for (i=0; HalpRangeList[i].Offset; i++) {
RangeList = RANGE_LIST(Ranges, i);
//
// Sort the list by base address
//
for (List1 = RangeList; List1; List1 = List1->Next) {
for (List2 = List1->Next; List2; List2 = List2->Next) {
if (List2->Base < List1->Base) {
Base = List1->Base;
Limit = List1->Limit;
SystemBase = List1->SystemBase;
AddressSpace = List1->SystemAddressSpace;
List1->Base = List2->Base;
List1->Limit = List2->Limit;
List1->SystemBase = List2->SystemBase;
List1->SystemAddressSpace = List2->SystemAddressSpace;
List2->Base = Base;
List2->Limit = Limit;
List2->SystemBase = SystemBase;
List2->SystemAddressSpace = AddressSpace;
}
}
}
//
// Check for adjacent/overlapping ranges and combined them
//
List1 = RangeList;
while (List1 && List1->Next) {
if (List1->Limit < List1->Base) {
//
// This range's limit is less then it's base. This
// entry doesn't reprent anything uasable, remove it.
//
List2 = List1->Next;
List1->Next = List2->Next;
List1->Base = List2->Base;
List1->Limit = List2->Limit;
List1->SystemBase = List2->SystemBase;
List1->SystemAddressSpace = List2->SystemAddressSpace;
ExFreePool (List2);
continue;
}
l = List1->Limit + 1;
if (l > List1->Limit && l >= List1->Next->Base &&
(List1->SystemBase == List1->Next->SystemBase)) {
//
// Overlapping. Combine them.
//
List2 = List1->Next;
List1->Next = List2->Next;
if (List2->Limit > List1->Limit) {
List1->Limit = List2->Limit;
ASSERT (List1->SystemAddressSpace == List2->SystemAddressSpace);
}
ExFreePool (List2);
continue ;
}
List1 = List1->Next;
}
//
// If the last range is invalid, and it's not the only
// thing in the list - remove it
//
if (List1 != RangeList && List1->Limit < List1->Base) {
for (List2=RangeList; List2->Next != List1; List2 = List2->Next) ;
List2->Next = NULL;
ExFreePool (List1);
}
}
return Ranges;
}
PSUPPORTED_RANGES
HalpAllocateNewRangeList (
VOID
)
/*++
Routine Description:
Allocates a range list
--*/
{
PSUPPORTED_RANGES RangeList;
ULONG i;
RangeList = (PSUPPORTED_RANGES) ExAllocatePoolWithTag (
SPRANGEPOOL,
sizeof (SUPPORTED_RANGES),
HAL_POOL_TAG
);
RtlZeroMemory (RangeList, sizeof (SUPPORTED_RANGES));
RangeList->Version = BUS_SUPPORTED_RANGE_VERSION;
for (i=0; HalpRangeList[i].Offset; i++) {
// Limit set to zero, set initial base to 1
RANGE_LIST(RangeList, i)->Base = 1;
}
return RangeList;
}
VOID
HalpFreeRangeList (
PSUPPORTED_RANGES Ranges
)
/*++
Routine Description:
Frees a range list which was allocated via HalpAllocateNewRangeList, and
extended / modified via the generic support functions.
--*/
{
PSUPPORTED_RANGE Entry, NextEntry;
ULONG i;
for (i=0; HalpRangeList[i].Offset; i++) {
Entry = RANGE_LIST(Ranges, i)->Next;
while (Entry) {
NextEntry = Entry->Next;
ExFreePool (Entry);
Entry = NextEntry;
}
}
ExFreePool (Ranges);
}
#if DBG
STATIC VOID
HalpDisplayAddressRange (
PSUPPORTED_RANGE Address,
PUCHAR String
)
/*++
Routine Description:
Debugging code. Used only by HalpDisplayAllBusRanges
--*/
{
ULONG i;
i = 0;
while (Address) {
if (i == 0) {
DbgPrint (String);
i = 3;
}
i -= 1;
DbgPrint (" %x:%08x - %x:%08x ",
(ULONG) (Address->Base >> 32),
(ULONG) (Address->Base),
(ULONG) (Address->Limit >> 32),
(ULONG) (Address->Limit)
);
Address = Address->Next;
}
}
VOID
HalpDisplayAllBusRanges (
VOID
)
/*++
Routine Description:
Debugging code. Displays the current supported range information
for all the registered buses in the system.
--*/
{
PSUPPORTED_RANGES Addresses;
PBUS_HANDLER Bus;
PUCHAR p;
ULONG i, j;
DbgPrint ("\nHAL - dumping all supported bus ranges");
for (i=0; i < MaximumInterfaceType; i++) {
for (j=0; Bus = HaliHandlerForBus (i, j); j++) {
Addresses = Bus->BusAddresses;
if (Addresses) {
p = NULL;
switch (Bus->InterfaceType) {
case Internal: p = "Internal"; break;
case Isa: p = "Isa"; break;
case Eisa: p = "Eisa"; break;
case PCIBus: p = "PCI"; break;
}
if (p) {
DbgPrint ("\n%s %d", p, Bus->BusNumber);
} else {
DbgPrint ("\nBus-%d %d", Bus->InterfaceType, Bus->BusNumber);
}
HalpDisplayAddressRange (&Addresses->IO, "\n IO......:");
HalpDisplayAddressRange (&Addresses->Memory, "\n Memory..:");
HalpDisplayAddressRange (&Addresses->PrefetchMemory,"\n PFMemory:");
HalpDisplayAddressRange (&Addresses->Dma, "\n Dma.....:");
DbgPrint ("\n");
}
}
}
}
#endif
NTSTATUS
HaliAdjustResourceListRange (
IN PSUPPORTED_RANGES SRanges,
IN PSUPPORTED_RANGE InterruptRange,
IN OUT PIO_RESOURCE_REQUIREMENTS_LIST *pResourceList
)
/*++
Routine Description:
This functions takes an IO_RESOURCE_REQUIREMENT_LIST and
adjusts it such that all ranges in the list fit in the
ranges specified by SRanges & InterruptRange.
This function is used by some HALs to clip the possible
settings to be contained on what the particular bus supports
in reponse to a HalAdjustResourceList call.
Arguments:
SRanges - Valid IO, Memory, Prefetch Memory, and DMA ranges.
InterruptRange - Valid InterruptRanges
pResourceList - The resource requirements list which needs to
be adjusted to only contain the ranges as
described by SRanges & InterruptRange.
Return Value:
STATUS_SUCCESS or an appropiate error return.
--*/
{
PIO_RESOURCE_REQUIREMENTS_LIST InCompleteList, OutCompleteList;
PIO_RESOURCE_LIST InResourceList, OutResourceList;
PIO_RESOURCE_DESCRIPTOR HeadOutDesc, SetDesc;
NRPARAMS Pos;
ULONG len, alt, cnt, i;
ULONG icnt;
//
// Sanity check
//
if (!SRanges || SRanges->Version != BUS_SUPPORTED_RANGE_VERSION) {
return STATUS_INVALID_PARAMETER;
}
//
// If SupportedRanges aren't sorted, sort them and get the
// number of ranges for each type
//
if (!SRanges->Sorted) {
SRanges->NoIO = HalpSortRanges (&SRanges->IO);
SRanges->NoMemory = HalpSortRanges (&SRanges->Memory);
SRanges->NoPrefetchMemory = HalpSortRanges (&SRanges->PrefetchMemory);
SRanges->NoDma = HalpSortRanges (&SRanges->Dma);
SRanges->Sorted = TRUE;
}
icnt = HalpSortRanges (InterruptRange);
InCompleteList = *pResourceList;
len = InCompleteList->ListSize;
//
// Scan input list - verify revision #'s, and increase len varible
// by amount output list may increase.
//
i = 1;
InResourceList = InCompleteList->List;
for (alt=0; alt < InCompleteList->AlternativeLists; alt++) {
if (InResourceList->Version != 1 || InResourceList->Revision < 1) {
return STATUS_INVALID_PARAMETER;
}
Pos.InDesc = InResourceList->Descriptors;
for (cnt = InResourceList->Count; cnt; cnt--) {
switch (Pos.InDesc->Type) {
case CmResourceTypeInterrupt: i += icnt; break;
case CmResourceTypePort: i += SRanges->NoIO; break;
case CmResourceTypeDma: i += SRanges->NoDma; break;
case CmResourceTypeMemory:
i += SRanges->NoMemory;
if (Pos.InDesc->Flags & CM_RESOURCE_MEMORY_PREFETCHABLE) {
i += SRanges->NoPrefetchMemory;
}
break;
default:
return STATUS_INVALID_PARAMETER;
}
// take one off for the original which is already accounted for in 'len'
i -= 1;
// Next descriptor
Pos.InDesc++;
}
// Next Resource List
InResourceList = (PIO_RESOURCE_LIST) Pos.InDesc;
}
len += i * sizeof (IO_RESOURCE_DESCRIPTOR);
//
// Allocate output list
//
OutCompleteList = (PIO_RESOURCE_REQUIREMENTS_LIST)
ExAllocatePoolWithTag (PagedPool,
len,
' laH');
if (!OutCompleteList) {
return STATUS_INSUFFICIENT_RESOURCES;
}
RtlZeroMemory (OutCompleteList, len);
//
// Walk each ResourceList and build output structure
//
InResourceList = InCompleteList->List;
*OutCompleteList = *InCompleteList;
OutResourceList = OutCompleteList->List;
for (alt=0; alt < InCompleteList->AlternativeLists; alt++) {
OutResourceList->Version = 1;
OutResourceList->Revision = 1;
Pos.InDesc = InResourceList->Descriptors;
Pos.OutDesc = OutResourceList->Descriptors;
HeadOutDesc = Pos.OutDesc;
for (cnt = InResourceList->Count; cnt; cnt--) {
//
// Limit desctiptor to be with the buses supported ranges
//
Pos.DescOpt = Pos.InDesc->Option;
Pos.AnotherListPending = FALSE;
switch (Pos.InDesc->Type) {
case CmResourceTypePort:
//
// Get supported IO ranges
//
Pos.CurrentPosition = &SRanges->IO;
do {
SetDesc = HalpGetNextSupportedRange (
Pos.InDesc->u.Port.MinimumAddress.QuadPart,
Pos.InDesc->u.Port.MaximumAddress.QuadPart,
&Pos
);
if (SetDesc) {
SetDesc->u.Port.MinimumAddress.QuadPart = Pos.Base;
SetDesc->u.Port.MaximumAddress.QuadPart = Pos.Limit;
}
} while (SetDesc) ;
break;
case CmResourceTypeInterrupt:
//
// Get supported Interrupt ranges
//
Pos.CurrentPosition = InterruptRange;
do {
SetDesc = HalpGetNextSupportedRange (
Pos.InDesc->u.Interrupt.MinimumVector,
Pos.InDesc->u.Interrupt.MaximumVector,
&Pos
);
if (SetDesc) {
SetDesc->u.Interrupt.MinimumVector = (ULONG) Pos.Base;
SetDesc->u.Interrupt.MaximumVector = (ULONG) Pos.Limit;
}
} while (SetDesc) ;
break;
case CmResourceTypeMemory:
//
// Get supported memory ranges
//
if (Pos.InDesc->Flags & CM_RESOURCE_MEMORY_PREFETCHABLE) {
//
// This is a Prefetchable range.
// First add in any supported prefetchable ranges, then
// add in any regualer supported ranges
//
Pos.AnotherListPending = TRUE;
Pos.CurrentPosition = &SRanges->PrefetchMemory;
do {
SetDesc = HalpGetNextSupportedRange (
Pos.InDesc->u.Memory.MinimumAddress.QuadPart,
Pos.InDesc->u.Memory.MaximumAddress.QuadPart,
&Pos
);
if (SetDesc) {
SetDesc->u.Memory.MinimumAddress.QuadPart = Pos.Base;
SetDesc->u.Memory.MaximumAddress.QuadPart = Pos.Limit;
SetDesc->Option |= IO_RESOURCE_PREFERRED;
}
} while (SetDesc) ;
Pos.AnotherListPending = FALSE;
}
//
// Add in supported bus memory ranges
//
Pos.CurrentPosition = &SRanges->Memory;
do {
SetDesc = HalpGetNextSupportedRange (
Pos.InDesc->u.Memory.MinimumAddress.QuadPart,
Pos.InDesc->u.Memory.MaximumAddress.QuadPart,
&Pos
);
if (SetDesc) {
SetDesc->u.Memory.MinimumAddress.QuadPart = Pos.Base;
SetDesc->u.Memory.MaximumAddress.QuadPart = Pos.Limit;
}
} while (SetDesc);
break;
case CmResourceTypeDma:
//
// Get supported DMA ranges
//
Pos.CurrentPosition = &SRanges->Dma;
do {
SetDesc = HalpGetNextSupportedRange (
Pos.InDesc->u.Dma.MinimumChannel,
Pos.InDesc->u.Dma.MaximumChannel,
&Pos
);
if (SetDesc) {
SetDesc->u.Dma.MinimumChannel = (ULONG) Pos.Base;
SetDesc->u.Dma.MaximumChannel = (ULONG) Pos.Limit;
}
} while (SetDesc) ;
break;
#if DBG
default:
DbgPrint ("HalAdjustResourceList: Unkown resource type\n");
break;
#endif
}
//
// Next descriptor
//
Pos.InDesc++;
}
OutResourceList->Count = (ULONG)(Pos.OutDesc - HeadOutDesc);
//
// Next Resource List
//
InResourceList = (PIO_RESOURCE_LIST) Pos.InDesc;
OutResourceList = (PIO_RESOURCE_LIST) Pos.OutDesc;
}
//
// Free input list, and return output list
//
ExFreePool (InCompleteList);
OutCompleteList->ListSize = (ULONG) ((PUCHAR) OutResourceList - (PUCHAR) OutCompleteList);
*pResourceList = OutCompleteList;
return STATUS_SUCCESS;
}
STATIC PIO_RESOURCE_DESCRIPTOR
HalpGetNextSupportedRange (
IN LONGLONG MinimumAddress,
IN LONGLONG MaximumAddress,
IN OUT PNRPARAMS Pos
)
/*++
Routine Description:
Support function for HaliAdjustResourceListRange.
Returns the next supported range in the area passed in.
Arguments:
MinimumAddress
MaximumAddress - Min & Max address of a range which needs
to be clipped to match that of the supported
ranges of the current bus.
Pos - describes the current postion
Return Value:
NULL is no more returned ranges
Otherwise, the IO_RESOURCE_DESCRIPTOR which needs to be set
with the matching range returned in Pos.
--*/
{
LONGLONG Base, Limit;
//
// Find next range which is supported
//
Base = MinimumAddress;
Limit = MaximumAddress;
while (Pos->CurrentPosition) {
Pos->Base = Base;
Pos->Limit = Limit;
//
// Clip to current range
//
if (Pos->Base < Pos->CurrentPosition->Base) {
Pos->Base = Pos->CurrentPosition->Base;
}
if (Pos->Limit > Pos->CurrentPosition->Limit) {
Pos->Limit = Pos->CurrentPosition->Limit;
}
//
// set position to next range
//
Pos->CurrentPosition = Pos->CurrentPosition->Next;
//
// If valid range, return it
//
if (Pos->Base <= Pos->Limit) {
*Pos->OutDesc = *Pos->InDesc;
Pos->OutDesc->Option = Pos->DescOpt;
//
// next descriptor (if any) is an alternative
// to the descriptor being returned now
//
Pos->OutDesc += 1;
Pos->DescOpt |= IO_RESOURCE_ALTERNATIVE;
return Pos->OutDesc - 1;
}
}
//
// There's no overlapping range. If this descriptor is
// not an alternative and this descriptor is not going to
// be processed by another range list, then return
// a descriptor which can't be satisified.
//
if (!(Pos->DescOpt & IO_RESOURCE_ALTERNATIVE) &&
Pos->AnotherListPending == FALSE) {
#if DBG
DbgPrint ("HAL: returning impossible range\n");
#endif
Pos->Base = MinimumAddress;
Pos->Limit = Pos->Base - 1;
if (Pos->Base == 0) { // if wrapped, fix it
Pos->Base = 1;
Pos->Limit = 0;
}
*Pos->OutDesc = *Pos->InDesc;
Pos->OutDesc->Option = Pos->DescOpt;
Pos->OutDesc += 1;
Pos->DescOpt |= IO_RESOURCE_ALTERNATIVE;
return Pos->OutDesc - 1;
}
//
// No range found (or no more ranges)
//
return NULL;
}
STATIC ULONG
HalpSortRanges (
IN PSUPPORTED_RANGE RangeList
)
/*++
Routine Description:
Support function for HaliAdjustResourceListRange.
Sorts a supported range list into decending order.
Arguments:
pRange - List to sort
Return Value:
--*/
{
ULONG cnt;
LONGLONG hldBase, hldLimit, hldSystemBase;
PSUPPORTED_RANGE Range1, Range2;
//
// Sort it
//
for (Range1 = RangeList; Range1; Range1 = Range1->Next) {
for (Range2 = Range1->Next; Range2; Range2 = Range2->Next) {
if (Range2->Base > Range1->Base) {
hldBase = Range1->Base;
hldLimit = Range1->Limit;
hldSystemBase = Range1->SystemBase;
Range1->Base = Range2->Base;
Range1->Limit = Range2->Limit;
Range1->SystemBase = Range2->SystemBase;
Range2->Base = hldBase;
Range2->Limit = hldLimit;
Range2->SystemBase = hldSystemBase;
}
}
}
//
// Count the number of ranges
//
cnt = 0;
for (Range1 = RangeList; Range1; Range1 = Range1->Next) {
cnt += 1;
}
return cnt;
}
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