/*++
Copyright (c) 1989 Microsoft Corporation
Module Name:
ixpcibrd.c
Abstract:
Get PCI-PCI bridge information
Author:
Ken Reneris (kenr) 14-June-1994
Environment:
Kernel mode
Revision History:
--*/
#include "halp.h"
#include "pci.h"
#include "pcip.h"
#include "stdio.h"
// debugging only...
// #define INIT_PCI_BRIDGE 1
extern WCHAR rgzMultiFunctionAdapter[];
extern WCHAR rgzConfigurationData[];
extern WCHAR rgzIdentifier[];
extern WCHAR rgzReservedResources[];
#if DBG
#define DBGMSG(a) DbgPrint(a)
#else
#define DBGMSG(a)
#endif
#define IsPciBridge(a) \
(a->VendorID != PCI_INVALID_VENDORID && \
PCI_CONFIG_TYPE(a) == PCI_BRIDGE_TYPE && \
a->SubClass == 4 && a->BaseClass == 6)
typedef struct {
ULONG BusNo;
PBUS_HANDLER BusHandler;
PPCIPBUSDATA BusData;
PCI_SLOT_NUMBER SlotNumber;
PPCI_COMMON_CONFIG PciData;
ULONG IO, Memory, PFMemory;
UCHAR Buffer[PCI_COMMON_HDR_LENGTH];
} CONFIGBRIDGE, *PCONFIGBRIDGE;
//
// Internal prototypes
//
#ifdef INIT_PCI_BRIDGE
VOID
HalpGetPciBridgeNeeds (
IN ULONG HwType,
IN PUCHAR MaxPciBus,
IN PCONFIGBRIDGE Current
);
#endif
VOID
HalpSetPciBridgedVgaCronk (
IN ULONG BusNumber,
IN ULONG Base,
IN ULONG Limit
);
ULONG
HalpGetBridgedPCIInterrupt (
IN PBUS_HANDLER BusHandler,
IN PBUS_HANDLER RootHandler,
IN ULONG BusInterruptLevel,
IN ULONG BusInterruptVector,
OUT PKIRQL Irql,
OUT PKAFFINITY Affinity
);
ULONG
HalpGetBridgedPCIISAInt (
IN PBUS_HANDLER BusHandler,
IN PBUS_HANDLER RootHandler,
IN ULONG BusInterruptLevel,
IN ULONG BusInterruptVector,
OUT PKIRQL Irql,
OUT PKAFFINITY Affinity
);
VOID
HalpPCIBridgedPin2Line (
IN PBUS_HANDLER BusHandler,
IN PBUS_HANDLER RootHandler,
IN PCI_SLOT_NUMBER SlotNumber,
IN PPCI_COMMON_CONFIG PciData
);
VOID
HalpPCIBridgedLine2Pin (
IN PBUS_HANDLER BusHandler,
IN PBUS_HANDLER RootHandler,
IN PCI_SLOT_NUMBER SlotNumber,
IN PPCI_COMMON_CONFIG PciNewData,
IN PPCI_COMMON_CONFIG PciOldData
);
NTSTATUS
HalpGetBridgedPCIIrqTable (
IN PBUS_HANDLER BusHandler,
IN PBUS_HANDLER RootHandler,
IN PCI_SLOT_NUMBER PciSlot,
OUT PUCHAR IrqTable
);
#ifdef ALLOC_PRAGMA
#pragma alloc_text(INIT,HalpGetPciBridgeConfig)
#pragma alloc_text(INIT,HalpSetPciBridgedVgaCronk)
#pragma alloc_text(INIT,HalpFixupPciSupportedRanges)
#ifdef INIT_PCI_BRIDGE
#pragma alloc_text(PAGE,HalpGetBridgedPCIInterrupt)
//#pragma alloc_text(PAGE,HalpGetBridgedPCIIrqTable)
#pragma alloc_text(INIT,HalpGetPciBridgeNeeds)
#endif
#endif
BOOLEAN
HalpGetPciBridgeConfig (
IN ULONG HwType,
IN PUCHAR MaxPciBus
)
/*++
Routine Description:
Scan the devices on all known pci buses trying to locate any
pci to pci bridges. Record the hierarchy for the buses, and
which buses have what addressing limits.
Arguments:
HwType - Configuration type.
MaxPciBus - # of PCI buses reported by the bios
--*/
{
PBUS_HANDLER ChildBus;
PPCIPBUSDATA ChildBusData;
ULONG d, f, i, j, BusNo;
UCHAR Rescan;
BOOLEAN FoundDisabledBridge;
CONFIGBRIDGE CB;
Rescan = 0;
FoundDisabledBridge = FALSE;
//
// Find each bus on a bridge and initialize it's base and limit information
//
CB.PciData = (PPCI_COMMON_CONFIG) CB.Buffer;
CB.SlotNumber.u.bits.Reserved = 0;
for (BusNo=0; BusNo < *MaxPciBus; BusNo++) {
CB.BusHandler = HalpHandlerForBus (PCIBus, BusNo);
CB.BusData = (PPCIPBUSDATA) CB.BusHandler->BusData;
for (d = 0; d < PCI_MAX_DEVICES; d++) {
CB.SlotNumber.u.bits.DeviceNumber = d;
for (f = 0; f < PCI_MAX_FUNCTION; f++) {
CB.SlotNumber.u.bits.FunctionNumber = f;
//
// Read PCI configuration information
//
HalpReadPCIConfig (
CB.BusHandler,
CB.SlotNumber,
CB.PciData,
0,
PCI_COMMON_HDR_LENGTH
);
if (CB.PciData->VendorID == PCI_INVALID_VENDORID) {
// next device
break;
}
if (!IsPciBridge (CB.PciData)) {
// not a PCI-PCI bridge, next function
continue;
}
if (!(CB.PciData->Command & PCI_ENABLE_BUS_MASTER)) {
// this PCI bridge is not enabled - skip it for now
FoundDisabledBridge = TRUE;
continue;
}
if ((ULONG) CB.PciData->u.type1.PrimaryBus !=
CB.BusHandler->BusNumber) {
DBGMSG ("HAL GetPciData: bad primarybus!!!\n");
// skip it...
continue;
}
if ((ULONG) CB.PciData->u.type1.SecondaryBus <= CB.BusHandler->BusNumber) {
// secondary bus number doesn't make any sense. HP Omnibook may
// not fill this field in on a virtually disabled pci-pci bridge
FoundDisabledBridge = TRUE;
continue;
}
//
// Found a PCI-PCI bridge. Determine it's parent child
// releationships
//
ChildBus = HalpHandlerForBus (PCIBus, CB.PciData->u.type1.SecondaryBus);
if (!ChildBus) {
DBGMSG ("HAL GetPciData: found configured pci bridge\n");
// up the number of buses
if (CB.PciData->u.type1.SecondaryBus > Rescan) {
Rescan = CB.PciData->u.type1.SecondaryBus;
}
continue;
}
ChildBusData = (PPCIPBUSDATA) ChildBus->BusData;
if (ChildBusData->BridgeConfigRead) {
// this child buses releationships already processed
continue;
}
//
// Remember the limits which are programmed into this bridge
//
ChildBusData->BridgeConfigRead = TRUE;
HalpSetBusHandlerParent (ChildBus, CB.BusHandler);
ChildBusData->ParentBus = (UCHAR) CB.BusHandler->BusNumber;
ChildBusData->CommonData.ParentSlot = CB.SlotNumber;
ChildBus->BusAddresses->IO.Base =
PciBridgeIO2Base(
CB.PciData->u.type1.IOBase,
CB.PciData->u.type1.IOBaseUpper16
);
ChildBus->BusAddresses->IO.Limit =
PciBridgeIO2Limit(
CB.PciData->u.type1.IOLimit,
CB.PciData->u.type1.IOLimitUpper16
);
//
// Special VGA address remapping occuring on this bridge?
//
if (CB.PciData->u.type1.BridgeControl & PCI_ENABLE_BRIDGE_VGA &&
ChildBus->BusAddresses->IO.Base < ChildBus->BusAddresses->IO.Limit) {
HalpSetPciBridgedVgaCronk (
ChildBus->BusNumber,
(ULONG) ChildBus->BusAddresses->IO.Base,
(ULONG) ChildBus->BusAddresses->IO.Limit
);
}
//
// If supported I/O ranges on this bus are limitied to
// 256bytes on every 1K aligned boundry within the
// range, then redo supported IO BusAddresses to match
//
if (CB.PciData->u.type1.BridgeControl & PCI_ENABLE_BRIDGE_ISA &&
ChildBus->BusAddresses->IO.Base < ChildBus->BusAddresses->IO.Limit) {
// assume Base is 1K aligned
i = (ULONG) ChildBus->BusAddresses->IO.Base;
j = (ULONG) ChildBus->BusAddresses->IO.Limit;
// convert head entry
ChildBus->BusAddresses->IO.Limit = i + 255;
i += 1024;
// add remaining ranges
while (i < j) {
HalpAddRange (
&ChildBus->BusAddresses->IO,
1, // address space
0, // system base
i, // bus address
i + 255 // bus limit
);
// next range
i += 1024;
}
}
ChildBus->BusAddresses->Memory.Base =
PciBridgeMemory2Base(CB.PciData->u.type1.MemoryBase);
ChildBus->BusAddresses->Memory.Limit =
PciBridgeMemory2Limit(CB.PciData->u.type1.MemoryLimit);
// On x86 it's ok to clip Prefetch to 32 bits
if (CB.PciData->u.type1.PrefetchBaseUpper32 == 0) {
ChildBus->BusAddresses->PrefetchMemory.Base =
PciBridgeMemory2Base(CB.PciData->u.type1.PrefetchBase);
ChildBus->BusAddresses->PrefetchMemory.Limit =
PciBridgeMemory2Limit(CB.PciData->u.type1.PrefetchLimit);
if (CB.PciData->u.type1.PrefetchLimitUpper32) {
ChildBus->BusAddresses->PrefetchMemory.Limit = 0xffffffff;
}
}
// should call HalpAssignPCISlotResources to assign
// baseaddresses, etc...
}
}
}
if (Rescan) {
*MaxPciBus = Rescan+1;
return TRUE;
}
if (!FoundDisabledBridge) {
return FALSE;
}
DBGMSG ("HAL GetPciData: found disabled pci bridge\n");
#ifdef INIT_PCI_BRIDGE
//
// We've calculated all the parent's buses known bases & limits.
// While doing this a pci-pci bus was found that the bios didn't
// configure. This is not expected, and we'll make some guesses
// at a configuration here and enable it.
//
// (this code is primarily for testing the above code since
// currently no system bioses actually configure the child buses)
//
for (BusNo=0; BusNo < *MaxPciBus; BusNo++) {
CB.BusHandler = HalpHandlerForBus (PCIBus, BusNo);
CB.BusData = (PPCIPBUSDATA) CB.BusHandler->BusData;
for (d = 0; d < PCI_MAX_DEVICES; d++) {
CB.SlotNumber.u.bits.DeviceNumber = d;
for (f = 0; f < PCI_MAX_FUNCTION; f++) {
CB.SlotNumber.u.bits.FunctionNumber = f;
HalpReadPCIConfig (
CB.BusHandler,
CB.SlotNumber,
CB.PciData,
0,
PCI_COMMON_HDR_LENGTH
);
if (CB.PciData->VendorID == PCI_INVALID_VENDORID) {
break;
}
if (!IsPciBridge (CB.PciData)) {
// not a PCI-PCI bridge
continue;
}
if ((CB.PciData->Command & PCI_ENABLE_BUS_MASTER)) {
// this PCI bridge is enabled
continue;
}
//
// We have a disabled bus - assign it a number, then
// determine all the requirements of all devices
// on the other side of this bridge
//
CB.BusNo = BusNo;
HalpGetPciBridgeNeeds (HwType, MaxPciBus, &CB);
}
}
}
// preform Rescan
return TRUE;
#else
return FALSE;
#endif
}
VOID
HalpFixupPciSupportedRanges (
IN ULONG MaxBuses
)
/*++
Routine Description:
PCI-PCI bridged buses only see addresses which their parent
bueses support. So adjust any PCI SUPPORT_RANGES to be
a complete subset of all of it's parent buses.
PCI-PCI briges use postive address decode to forward addresses.
So, remove any addresses from any PCI bus which are bridged to
a child PCI bus.
--*/
{
ULONG i;
PBUS_HANDLER Bus, ParentBus;
PSUPPORTED_RANGES HRanges;
//
// Pass 1 - shrink all PCI supported ranges to be a subset of
// all of it's parent buses
//
for (i = 0; i < MaxBuses; i++) {
Bus = HalpHandlerForBus (PCIBus, i);
ParentBus = Bus->ParentHandler;
while (ParentBus) {
HRanges = Bus->BusAddresses;
Bus->BusAddresses = HalpMergeRanges (
ParentBus->BusAddresses,
HRanges
);
HalpFreeRangeList (HRanges);
ParentBus = ParentBus->ParentHandler;
}
}
//
// Pass 2 - remove all child PCI bus ranges from parent PCI buses
//
for (i = 0; i < MaxBuses; i++) {
Bus = HalpHandlerForBus (PCIBus, i);
ParentBus = Bus->ParentHandler;
while (ParentBus) {
if (ParentBus->InterfaceType == PCIBus) {
HalpRemoveRanges (
ParentBus->BusAddresses,
Bus->BusAddresses
);
}
ParentBus = ParentBus->ParentHandler;
}
}
//
// Cleanup
//
for (i = 0; i < MaxBuses; i++) {
Bus = HalpHandlerForBus (PCIBus, i);
HalpConsolidateRanges (Bus->BusAddresses);
}
}
VOID
HalpSetPciBridgedVgaCronk (
IN ULONG BusNumber,
IN ULONG BaseAddress,
IN ULONG LimitAddress
)
/*++
Routine Description: .
The 'vga compatible addresses' bit is set in the bridge control regiter.
This causes the bridge to pass any I/O address in the range of: 10bit
decode 3b0-3bb & 3c0-3df, as TEN bit addresses.
As far as I can tell this "feature" is an attempt to solve some problem
which the folks solving it did not fully understand, so instead of doing
it right we have this fine mess.
The solution is to take the least of all evils which is to remove any
I/O port ranges which are getting remapped from any IoAssignResource
request. (ie, IoAssignResources will never contimplate giving any
I/O port out in the suspected ranges).
note: memory allocation error here is fatal so don't bother with the
return codes.
Arguments:
Base - Base of IO address range in question
Limit - Limit of IO address range in question
--*/
{
UNICODE_STRING unicodeString;
OBJECT_ATTRIBUTES objectAttributes;
HANDLE handle;
ULONG Length;
PCM_RESOURCE_LIST ResourceList;
PCM_PARTIAL_RESOURCE_DESCRIPTOR Descriptor;
ULONG AddressMSBs;
WCHAR ValueName[80];
NTSTATUS status;
//
// Open reserved resource settings
//
RtlInitUnicodeString (&unicodeString, rgzReservedResources);
InitializeObjectAttributes( &objectAttributes,
&unicodeString,
OBJ_CASE_INSENSITIVE,
NULL,
(PSECURITY_DESCRIPTOR) NULL
);
status = ZwOpenKey( &handle, KEY_READ|KEY_WRITE, &objectAttributes);
if (!NT_SUCCESS(status)) {
return;
}
//
// Build resource list of reseved ranges
//
Length = ((LimitAddress - BaseAddress) / 1024 + 2) * 2 *
sizeof (CM_PARTIAL_RESOURCE_DESCRIPTOR) +
sizeof (CM_RESOURCE_LIST);
ResourceList = (PCM_RESOURCE_LIST) ExAllocatePool (PagedPool, Length);
memset (ResourceList, 0, Length);
ResourceList->Count = 1;
ResourceList->List[0].InterfaceType = PCIBus;
ResourceList->List[0].BusNumber = BusNumber;
Descriptor = ResourceList->List[0].PartialResourceList.PartialDescriptors;
while (BaseAddress < LimitAddress) {
AddressMSBs = BaseAddress & ~0x3ff; // get upper 10bits of addr
//
// Add xx3b0 through xx3bb
//
Descriptor->Type = CmResourceTypePort;
Descriptor->ShareDisposition = CmResourceShareDeviceExclusive;
Descriptor->Flags = CM_RESOURCE_PORT_IO;
Descriptor->u.Port.Start.QuadPart = AddressMSBs | 0x3b0;
Descriptor->u.Port.Length = 0xb;
Descriptor += 1;
ResourceList->List[0].PartialResourceList.Count += 1;
//
// Add xx3c0 through xx3df
//
Descriptor->Type = CmResourceTypePort;
Descriptor->ShareDisposition = CmResourceShareDeviceExclusive;
Descriptor->Flags = CM_RESOURCE_PORT_IO;
Descriptor->u.Port.Start.QuadPart = AddressMSBs | 0x3c0;
Descriptor->u.Port.Length = 0x1f;
Descriptor += 1;
ResourceList->List[0].PartialResourceList.Count += 1;
//
// Next range
//
BaseAddress += 1024;
}
//
// Add the reserved ranges to avoid during IoAssignResource
//
swprintf (ValueName, L"HAL_PCI_%d", BusNumber);
RtlInitUnicodeString (&unicodeString, ValueName);
ZwSetValueKey (handle,
&unicodeString,
0L,
REG_RESOURCE_LIST,
ResourceList,
(ULONG) Descriptor - (ULONG) ResourceList
);
ExFreePool (ResourceList);
ZwClose (handle);
}
#ifdef INIT_PCI_BRIDGE
VOID
HalpGetPciBridgeNeeds (
IN ULONG HwType,
IN PUCHAR MaxPciBus,
IN PCONFIGBRIDGE Current
)
{
ACCESS_MASK DesiredAccess;
UNICODE_STRING unicodeString;
PUCHAR buffer;
HANDLE handle;
OBJECT_ATTRIBUTES objectAttributes;
PCM_FULL_RESOURCE_DESCRIPTOR Descriptor;
PCONFIGURATION_COMPONENT Component;
CONFIGBRIDGE CB;
ULONG mnum, d, f, i;
NTSTATUS status;
buffer = ExAllocatePool (PagedPool, 1024);
// init
CB.PciData = (PPCI_COMMON_CONFIG) CB.Buffer;
CB.SlotNumber.u.bits.Reserved = 0;
Current->IO = Current->Memory = Current->PFMemory = 0;
//
// Assign this bridge an ID, and turn on configuration space
//
Current->PciData->u.type1.PrimaryBus = (UCHAR) Current->BusNo;
Current->PciData->u.type1.SecondaryBus = (UCHAR) *MaxPciBus;
Current->PciData->u.type1.SubordinateBus = (UCHAR) 0xFF;
Current->PciData->u.type1.SecondaryStatus = 0xffff;
Current->PciData->Status = 0xffff;
Current->PciData->Command = 0;
Current->PciData->u.type1.BridgeControl = PCI_ASSERT_BRIDGE_RESET;
HalpWritePCIConfig (
Current->BusHandler,
Current->SlotNumber,
Current->PciData,
0,
PCI_COMMON_HDR_LENGTH
);
KeStallExecutionProcessor (100);
Current->PciData->u.type1.BridgeControl = 0;
HalpWritePCIConfig (
Current->BusHandler,
Current->SlotNumber,
Current->PciData,
0,
PCI_COMMON_HDR_LENGTH
);
KeStallExecutionProcessor (100);
//
// Allocate new handler for bus
//
CB.BusHandler = HalpAllocateAndInitPciBusHandler (HwType, *MaxPciBus, FALSE);
CB.BusData = (PPCIPBUSDATA) CB.BusHandler->BusData;
CB.BusNo = *MaxPciBus;
*MaxPciBus += 1;
//
// Add another PCI bus in the registry
//
mnum = 0;
for (; ;) {
//
// Find next available MultiFunctionAdapter key
//
DesiredAccess = KEY_READ | KEY_WRITE;
swprintf ((PWCHAR) buffer, L"%s\\%d", rgzMultiFunctionAdapter, mnum);
RtlInitUnicodeString (&unicodeString, (PWCHAR) buffer);
InitializeObjectAttributes( &objectAttributes,
&unicodeString,
OBJ_CASE_INSENSITIVE,
NULL,
(PSECURITY_DESCRIPTOR) NULL
);
status = ZwOpenKey( &handle, DesiredAccess, &objectAttributes);
if (!NT_SUCCESS(status)) {
break;
}
// already exists, next
ZwClose (handle);
mnum += 1;
}
ZwCreateKey (&handle,
DesiredAccess,
&objectAttributes,
0,
NULL,
REG_OPTION_VOLATILE,
&d
);
//
// Add needed registry values for this MultifucntionAdapter entry
//
RtlInitUnicodeString (&unicodeString, rgzIdentifier);
ZwSetValueKey (handle,
&unicodeString,
0L,
REG_SZ,
L"PCI",
sizeof (L"PCI")
);
RtlInitUnicodeString (&unicodeString, rgzConfigurationData);
Descriptor = (PCM_FULL_RESOURCE_DESCRIPTOR) buffer;
Descriptor->InterfaceType = PCIBus;
Descriptor->BusNumber = CB.BusNo;
Descriptor->PartialResourceList.Version = 0;
Descriptor->PartialResourceList.Revision = 0;
Descriptor->PartialResourceList.Count = 0;
ZwSetValueKey (handle,
&unicodeString,
0L,
REG_FULL_RESOURCE_DESCRIPTOR,
Descriptor,
sizeof (*Descriptor)
);
RtlInitUnicodeString (&unicodeString, L"Component Information");
Component = (PCONFIGURATION_COMPONENT) buffer;
RtlZeroMemory (Component, sizeof (*Component));
Component->AffinityMask = 0xffffffff;
ZwSetValueKey (handle,
&unicodeString,
0L,
REG_BINARY,
Component,
FIELD_OFFSET (CONFIGURATION_COMPONENT, ConfigurationDataLength)
);
ZwClose (handle);
//
// Since the BIOS didn't configure this bridge we'll assume that
// the PCI interrupts are bridged. (for BIOS configured buses we
// assume that the BIOS put the ISA bus IRQ in the InterruptLine value)
//
CB.BusData->Pin2Line = (PciPin2Line) HalpPCIBridgedPin2Line;
CB.BusData->Line2Pin = (PciLine2Pin) HalpPCIBridgedLine2Pin;
//CB.BusData->GetIrqTable = (PciIrqTable) HalpGetBridgedPCIIrqTable;
if (Current->BusHandler->GetInterruptVector == HalpGetPCIIntOnISABus) {
//
// The parent bus'es interrupt pin to vector mappings is not
// a static function, and is determined by the boot firmware.
//
//CB.BusHandler->GetInterruptVector = (PGETINTERRUPTVECTOR) HalpGetBridgedPCIISAInt;
// read each device on parent bus
for (d = 0; d < PCI_MAX_DEVICES; d++) {
CB.SlotNumber.u.bits.DeviceNumber = d;
for (f = 0; f < PCI_MAX_FUNCTION; f++) {
CB.SlotNumber.u.bits.FunctionNumber = f;
HalpReadPCIConfig (
Current->BusHandler,
CB.SlotNumber,
CB.PciData,
0,
PCI_COMMON_HDR_LENGTH
);
if (CB.PciData->VendorID == PCI_INVALID_VENDORID) {
break;
}
if (CB.PciData->u.type0.InterruptPin &&
(PCI_CONFIG_TYPE (CB.PciData) == PCI_DEVICE_TYPE ||
PCI_CONFIG_TYPE (CB.PciData) == PCI_BRIDGE_TYPE)) {
// get bios supplied int mapping
i = CB.PciData->u.type0.InterruptPin + d % 4;
CB.BusData->SwizzleIn[i] = CB.PciData->u.type0.InterruptLine;
}
}
}
} else {
_asm int 3;
}
//
// Look at each device on the bus and determine it's resource needs
//
for (d = 0; d < PCI_MAX_DEVICES; d++) {
CB.SlotNumber.u.bits.DeviceNumber = d;
for (f = 0; f < PCI_MAX_FUNCTION; f++) {
CB.SlotNumber.u.bits.FunctionNumber = f;
HalpReadPCIConfig (
CB.BusHandler,
CB.SlotNumber,
CB.PciData,
0,
PCI_COMMON_HDR_LENGTH
);
if (CB.PciData->VendorID == PCI_INVALID_VENDORID) {
break;
}
if (IsPciBridge (CB.PciData)) {
// oh look - another bridge ...
HalpGetPciBridgeNeeds (HwType, MaxPciBus, &CB);
continue;
}
if (PCI_CONFIG_TYPE (CB.PciData) != PCI_DEVICE_TYPE) {
continue;
}
// found a device - figure out the resources it needs
}
}
//
// Found all sub-buses set SubordinateBus accordingly
//
Current->PciData->u.type1.SubordinateBus = (UCHAR) *MaxPciBus - 1;
HalpWritePCIConfig (
Current->BusHandler,
Current->SlotNumber,
Current->PciData,
0,
PCI_COMMON_HDR_LENGTH
);
//
// Set the bridges IO, Memory, and Prefetch Memory windows
//
// For now just pick some numbers & set everyone the same
// IO 0x6000 - 0xFFFF
// MEM 0x40000000 - 0x4FFFFFFF
// PFMEM 0x50000000 - 0x5FFFFFFF
Current->PciData->u.type1.IOBase = 0x6000 >> 12 << 4;
Current->PciData->u.type1.IOLimit = 0xffff >> 12 << 4;
Current->PciData->u.type1.MemoryBase = 0x40000000 >> 20 << 4;
Current->PciData->u.type1.MemoryLimit = 0x4fffffff >> 20 << 4;
Current->PciData->u.type1.PrefetchBase = 0x50000000 >> 20 << 4;
Current->PciData->u.type1.PrefetchLimit = 0x5fffffff >> 20 << 4;
Current->PciData->u.type1.PrefetchBaseUpper32 = 0;
Current->PciData->u.type1.PrefetchLimitUpper32 = 0;
Current->PciData->u.type1.IOBaseUpper16 = 0;
Current->PciData->u.type1.IOLimitUpper16 = 0;
Current->PciData->u.type1.BridgeControl =
PCI_ENABLE_BRIDGE_ISA;
HalpWritePCIConfig (
Current->BusHandler,
Current->SlotNumber,
Current->PciData,
0,
PCI_COMMON_HDR_LENGTH
);
HalpReadPCIConfig (
Current->BusHandler,
Current->SlotNumber,
Current->PciData,
0,
PCI_COMMON_HDR_LENGTH
);
// enable memory & io decodes
Current->PciData->Command =
PCI_ENABLE_IO_SPACE | PCI_ENABLE_MEMORY_SPACE | PCI_ENABLE_BUS_MASTER;
HalpWritePCIConfig (
Current->BusHandler,
Current->SlotNumber,
&Current->PciData->Command,
FIELD_OFFSET (PCI_COMMON_CONFIG, Command),
sizeof (Current->PciData->Command)
);
ExFreePool (buffer);
}
VOID
HalpPCIBridgedPin2Line (
IN PBUS_HANDLER BusHandler,
IN PBUS_HANDLER RootHandler,
IN PCI_SLOT_NUMBER SlotNumber,
IN PPCI_COMMON_CONFIG PciData
)
/*++
This function maps the device's InterruptPin to an InterruptLine
value.
test function particular to dec pci-pci bridge card
--*/
{
PPCIPBUSDATA BusData;
ULONG i;
if (!PciData->u.type0.InterruptPin) {
return ;
}
BusData = (PPCIPBUSDATA) BusHandler->BusData;
//
// Convert slot Pin into Bus INTA-D.
//
i = (PciData->u.type0.InterruptPin +
SlotNumber.u.bits.DeviceNumber - 1) % 4;
PciData->u.type0.InterruptLine = BusData->SwizzleIn[i] ^ IRQXOR;
PciData->u.type0.InterruptLine = 0x0b ^ IRQXOR;
}
VOID
HalpPCIBridgedLine2Pin (
IN PBUS_HANDLER BusHandler,
IN PBUS_HANDLER RootHandler,
IN PCI_SLOT_NUMBER SlotNumber,
IN PPCI_COMMON_CONFIG PciNewData,
IN PPCI_COMMON_CONFIG PciOldData
)
/*++
This functions maps the device's InterruptLine to it's
device specific InterruptPin value.
test function particular to dec pci-pci bridge card
--*/
{
PPCIPBUSDATA BusData;
ULONG i;
if (!PciNewData->u.type0.InterruptPin) {
return ;
}
BusData = (PPCIPBUSDATA) BusHandler->BusData;
i = (PciNewData->u.type0.InterruptPin +
SlotNumber.u.bits.DeviceNumber - 1) % 4;
PciNewData->u.type0.InterruptLine = BusData->SwizzleIn[i] ^ IRQXOR;
PciNewData->u.type0.InterruptLine = 0x0b ^ IRQXOR;
}
#endif
