/**
Dump the resourc map of the bridge device.
@param[in] BridgeResource Resource descriptor of the bridge device.
**/
VOID
DumpBridgeResource (
IN PCI_RESOURCE_NODE *BridgeResource
)
{
LIST_ENTRY *Link;
PCI_RESOURCE_NODE *Resource;
PCI_BAR *Bar;
if ((BridgeResource != NULL) && (BridgeResource->Length != 0)) {
DEBUG ((
EFI_D_INFO, "Type = %s; Base = 0x%lx;\tLength = 0x%lx;\tAlignment = 0x%lx\n",
mBarTypeStr[MIN (BridgeResource->ResType, PciBarTypeMaxType)],
BridgeResource->PciDev->PciBar[BridgeResource->Bar].BaseAddress,
BridgeResource->Length, BridgeResource->Alignment
));
for ( Link = BridgeResource->ChildList.ForwardLink
; Link != &BridgeResource->ChildList
; Link = Link->ForwardLink
) {
Resource = RESOURCE_NODE_FROM_LINK (Link);
if (Resource->ResourceUsage == PciResUsageTypical) {
Bar = Resource->Virtual ? Resource->PciDev->VfPciBar : Resource->PciDev->PciBar;
DEBUG ((
EFI_D_INFO, " Base = 0x%lx;\tLength = 0x%lx;\tAlignment = 0x%lx;\tOwner = %s ",
Bar[Resource->Bar].BaseAddress, Resource->Length, Resource->Alignment,
IS_PCI_BRIDGE (&Resource->PciDev->Pci) ? L"PPB" :
IS_CARDBUS_BRIDGE (&Resource->PciDev->Pci) ? L"P2C" :
L"PCI"
));
if ((!IS_PCI_BRIDGE (&Resource->PciDev->Pci) && !IS_CARDBUS_BRIDGE (&Resource->PciDev->Pci)) ||
(IS_PCI_BRIDGE (&Resource->PciDev->Pci) && (Resource->Bar < PPB_IO_RANGE)) ||
(IS_CARDBUS_BRIDGE (&Resource->PciDev->Pci) && (Resource->Bar < P2C_MEM_1))
) {
//
// The resource requirement comes from the device itself.
//
DEBUG ((
EFI_D_INFO, " [%02x|%02x|%02x:%02x]\n",
Resource->PciDev->BusNumber, Resource->PciDev->DeviceNumber,
Resource->PciDev->FunctionNumber, Bar[Resource->Bar].Offset
));
} else {
//
// The resource requirement comes from the subordinate devices.
//
DEBUG ((
EFI_D_INFO, " [%02x|%02x|%02x:**]\n",
Resource->PciDev->BusNumber, Resource->PciDev->DeviceNumber,
Resource->PciDev->FunctionNumber
));
}
} else {
DEBUG ((EFI_D_INFO, " Padding:Length = 0x%lx;\tAlignment = 0x%lx\n", Resource->Length, Resource->Alignment));
}
}
}
}
EFI_STATUS
DetermineDeviceAttribute (
IN PCI_IO_DEVICE *PciIoDevice
)
/*++
Routine Description:
Determine the related attributes of all devices under a Root Bridge
Arguments:
Returns:
None
--*/
{
UINT16 Command;
UINT16 BridgeControl;
Command = 0;
PciIoDevice->Supports |= EFI_PCI_DEVICE_ENABLE;
PciIoDevice->Supports |= EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE;
if (IS_PCI_VGA (&(PciIoDevice->Pci))){
//
// If the device is VGA, VGA related Attributes are supported
//
PciIoDevice->Supports |= EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO ;
PciIoDevice->Supports |= EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY ;
PciIoDevice->Supports |= EFI_PCI_IO_ATTRIBUTE_VGA_IO ;
}
if(IS_ISA_BRIDGE(&(PciIoDevice->Pci)) || IS_INTEL_ISA_BRIDGE(&(PciIoDevice->Pci))) {
//
// If the devie is a ISA Bridge, set the two attributes
//
PciIoDevice->Supports |= EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO;
PciIoDevice->Supports |= EFI_PCI_IO_ATTRIBUTE_ISA_IO;
}
if (IS_PCI_GFX (&(PciIoDevice->Pci))) {
//
// If the device is GFX, then only set the EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO
// attribute
//
PciIoDevice->Supports |= EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO ;
}
//
// If the device is IDE, IDE related attributes are supported
//
if (IS_PCI_IDE (&(PciIoDevice->Pci))) {
PciIoDevice->Supports |= EFI_PCI_IO_ATTRIBUTE_IDE_PRIMARY_IO ;
PciIoDevice->Supports |= EFI_PCI_IO_ATTRIBUTE_IDE_SECONDARY_IO ;
}
PciReadCommandRegister(PciIoDevice, &Command);
if (Command & EFI_PCI_COMMAND_IO_SPACE) {
PciIoDevice->Attributes |= EFI_PCI_IO_ATTRIBUTE_IO;
}
if (Command & EFI_PCI_COMMAND_MEMORY_SPACE) {
PciIoDevice->Attributes |= EFI_PCI_IO_ATTRIBUTE_MEMORY;
}
if (Command & EFI_PCI_COMMAND_BUS_MASTER) {
PciIoDevice->Attributes |= EFI_PCI_IO_ATTRIBUTE_BUS_MASTER;
}
if (IS_PCI_BRIDGE (&(PciIoDevice->Pci)) ||
IS_CARDBUS_BRIDGE (&(PciIoDevice->Pci))){
//
// If it is a PPB, read the Bridge Control Register to determine
// the relevant attributes
//
BridgeControl = 0;
PciReadBridgeControlRegister(PciIoDevice, &BridgeControl);
//
// Determine whether the ISA bit is set
// If ISA Enable on Bridge is set, the PPB
// will block forwarding 0x100-0x3ff for each 1KB in the
// first 64KB I/O range.
//
if ((BridgeControl & EFI_PCI_BRIDGE_CONTROL_ISA) != 0) {
PciIoDevice->Attributes |= EFI_PCI_IO_ATTRIBUTE_ISA_IO;
}
//
// Determine whether the VGA bit is set
// If it is set, the bridge is set to decode VGA memory range
// and palette register range
//
if (IS_PCI_VGA (&(PciIoDevice->Pci)) &&BridgeControl & EFI_PCI_BRIDGE_CONTROL_VGA) {
PciIoDevice->Attributes |= EFI_PCI_IO_ATTRIBUTE_VGA_IO;
PciIoDevice->Attributes |= EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY;
PciIoDevice->Attributes |= EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO;
}
//
// if the palette snoop bit is set, then the brige is set to
// decode palette IO write
//
if (Command & EFI_PCI_COMMAND_VGA_PALETTE_SNOOP) {
PciIoDevice->Attributes |= EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO;
}
}
return EFI_SUCCESS;
}
EFI_STATUS
PciSearchDevice (
IN PCI_IO_DEVICE *Bridge,
IN PCI_TYPE00 *Pci,
IN UINT8 Bus,
IN UINT8 Device,
IN UINT8 Func,
OUT PCI_IO_DEVICE **PciDevice
)
/*++
Routine Description:
Search required device.
Arguments:
Bridge - A pointer to the PCI_IO_DEVICE.
Pci - A pointer to the PCI_TYPE00.
Bus - Bus number.
Device - Device number.
Func - Function number.
PciDevice - The Required pci device.
Returns:
Status code.
--*/
{
PCI_IO_DEVICE *PciIoDevice;
PciIoDevice = NULL;
if (!IS_PCI_BRIDGE (Pci)) {
if (IS_CARDBUS_BRIDGE (Pci)) {
PciIoDevice = GatherP2CInfo (
Bridge->PciRootBridgeIo,
Pci,
Bus,
Device,
Func
);
if ((PciIoDevice != NULL) && (gFullEnumeration == TRUE)) {
InitializeP2C (PciIoDevice);
}
} else {
//
// Create private data for Pci Device
//
PciIoDevice = GatherDeviceInfo (
Bridge->PciRootBridgeIo,
Pci,
Bus,
Device,
Func
);
}
} else {
//
// Create private data for PPB
//
PciIoDevice = GatherPPBInfo (
Bridge->PciRootBridgeIo,
Pci,
Bus,
Device,
Func
);
//
// Special initialization for PPB including making the PPB quiet
//
if ((PciIoDevice != NULL) && (gFullEnumeration == TRUE)) {
InitializePPB (PciIoDevice);
}
}
if (!PciIoDevice) {
return EFI_OUT_OF_RESOURCES;
}
//
// Create a device path for this PCI device and store it into its private data
//
CreatePciDevicePath(
Bridge->DevicePath,
PciIoDevice
);
//
// Detect this function has option rom
//
if (gFullEnumeration) {
if (!IS_CARDBUS_BRIDGE (Pci)) {
GetOpRomInfo (PciIoDevice);
}
ResetPowerManagementFeature (PciIoDevice);
}
else {
PciRomGetRomResourceFromPciOptionRomTable (
&gPciBusDriverBinding,
PciIoDevice->PciRootBridgeIo,
PciIoDevice
);
}
//
// Insert it into a global tree for future reference
//
InsertPciDevice (Bridge, PciIoDevice);
//
// Determine PCI device attributes
//
DetermineDeviceAttribute (PciIoDevice);
if (PciDevice != NULL) {
*PciDevice = PciIoDevice;
}
return EFI_SUCCESS;
}
EFI_STATUS
PciPciDeviceInfoCollector (
IN PCI_IO_DEVICE *Bridge,
UINT8 StartBusNumber
)
/*++
Routine Description:
Arguments:
Returns:
None
--*/
{
EFI_STATUS Status;
PCI_TYPE00 Pci;
UINT8 Device;
UINT8 Func;
UINT8 SecBus;
PCI_IO_DEVICE *PciIoDevice;
EFI_PCI_IO_PROTOCOL *PciIo;
Status = EFI_SUCCESS;
SecBus = 0;
for (Device = 0; Device <= PCI_MAX_DEVICE; Device++) {
for (Func = 0; Func <= PCI_MAX_FUNC; Func++) {
//
// Check to see whether PCI device is present
//
Status = PciDevicePresent (
Bridge->PciRootBridgeIo,
&Pci,
(UINT8) StartBusNumber,
(UINT8) Device,
(UINT8) Func
);
if (!EFI_ERROR (Status)) {
//
// Collect all the information about the PCI device discovered
//
Status = PciSearchDevice (
Bridge,
&Pci,
(UINT8) StartBusNumber,
Device,
Func,
&PciIoDevice
);
//
// Recursively scan PCI busses on the other side of PCI-PCI bridges
//
//
if (!EFI_ERROR (Status) && (IS_PCI_BRIDGE (&Pci) || IS_CARDBUS_BRIDGE (&Pci))) {
//
// If it is PPB, we need to get the secondary bus to continue the enumeration
//
PciIo = &(PciIoDevice->PciIo);
Status = PciIo->Pci.Read (PciIo, EfiPciIoWidthUint8, 0x19, 1, &SecBus);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Deep enumerate the next level bus
//
Status = PciPciDeviceInfoCollector (
PciIoDevice,
(UINT8) (SecBus)
);
}
if (Func == 0 && !IS_PCI_MULTI_FUNC (&Pci)) {
//
// Skip sub functions, this is not a multi function device
//
Func = PCI_MAX_FUNC;
}
}
}
}
return EFI_SUCCESS;
}
EFI_STATUS
EFIAPI
InitializePcatPciRootBridge (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
/*++
Routine Description:
Initializes the PCI Root Bridge Controller
Arguments:
ImageHandle -
SystemTable -
Returns:
None
--*/
{
EFI_STATUS Status;
PCAT_PCI_ROOT_BRIDGE_INSTANCE *PrivateData;
UINTN PciSegmentIndex;
UINTN PciRootBridgeIndex;
UINTN PrimaryBusIndex;
UINTN NumberOfPciRootBridges;
UINTN NumberOfPciDevices;
UINTN Device;
UINTN Function;
UINT16 VendorId;
PCI_TYPE02 PciConfigurationHeader;
UINT64 Address;
UINT64 Value;
UINT64 Base;
UINT64 Limit;
//
// Initialize gCpuIo now since the chipset init code requires it.
//
Status = gBS->LocateProtocol (&gEfiCpuIo2ProtocolGuid, NULL, (VOID **)&gCpuIo);
ASSERT_EFI_ERROR (Status);
//
// Initialize variables required to search all PCI segments for PCI devices
//
PciSegmentIndex = 0;
PciRootBridgeIndex = 0;
NumberOfPciRootBridges = 0;
PrimaryBusIndex = 0;
while (PciSegmentIndex <= PCI_MAX_SEGMENT) {
PrivateData = NULL;
Status = gBS->AllocatePool(
EfiBootServicesData,
sizeof (PCAT_PCI_ROOT_BRIDGE_INSTANCE),
(VOID **)&PrivateData
);
if (EFI_ERROR (Status)) {
goto Done;
}
ZeroMem (PrivateData, sizeof (PCAT_PCI_ROOT_BRIDGE_INSTANCE));
//
// Initialize the signature of the private data structure
//
PrivateData->Signature = PCAT_PCI_ROOT_BRIDGE_SIGNATURE;
PrivateData->Handle = NULL;
PrivateData->DevicePath = NULL;
InitializeListHead (&PrivateData->MapInfo);
//
// Initialize the PCI root bridge number and the bus range for that root bridge
//
PrivateData->RootBridgeNumber = (UINT32)PciRootBridgeIndex;
PrivateData->PrimaryBus = (UINT32)PrimaryBusIndex;
PrivateData->SubordinateBus = (UINT32)PrimaryBusIndex;
PrivateData->IoBase = 0xffffffff;
PrivateData->MemBase = 0xffffffff;
PrivateData->Mem32Base = 0xffffffffffffffffULL;
PrivateData->Pmem32Base = 0xffffffffffffffffULL;
PrivateData->Mem64Base = 0xffffffffffffffffULL;
PrivateData->Pmem64Base = 0xffffffffffffffffULL;
//
// The default mechanism for performing PCI Configuration cycles is to
// use the I/O ports at 0xCF8 and 0xCFC. This is only used for IA-32.
// IPF uses SAL calls to perform PCI COnfiguration cycles
//
PrivateData->PciAddress = 0xCF8;
PrivateData->PciData = 0xCFC;
//
// Get the physical I/O base for performing PCI I/O cycles
// For IA-32, this is always 0, because IA-32 has IN and OUT instructions
// For IPF, a SAL call is made to retrieve the base address for PCI I/O cycles
//
Status = PcatRootBridgeIoGetIoPortMapping (
&PrivateData->PhysicalIoBase,
&PrivateData->PhysicalMemoryBase
);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Get PCI Express Base Address
//
PrivateData->PciExpressBaseAddress = GetPciExpressBaseAddressForRootBridge (PciSegmentIndex, PciRootBridgeIndex);
/* if (PrivateData->PciExpressBaseAddress != 0) {
DEBUG ((EFI_D_ERROR, "PCIE Base - 0x%lx\n", PrivateData->PciExpressBaseAddress));
}
*/
//
// Create a lock for performing PCI Configuration cycles
//
EfiInitializeLock (&PrivateData->PciLock, TPL_HIGH_LEVEL);
//
// Initialize the attributes for this PCI root bridge
//
PrivateData->Attributes = 0;
//
// Build the EFI Device Path Protocol instance for this PCI Root Bridge
//
Status = PcatRootBridgeDevicePathConstructor (&PrivateData->DevicePath, PciRootBridgeIndex, (BOOLEAN)((PrivateData->PciExpressBaseAddress != 0) ? TRUE : FALSE));
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Build the PCI Root Bridge I/O Protocol instance for this PCI Root Bridge
//
Status = PcatRootBridgeIoConstructor (&PrivateData->Io, PciSegmentIndex);
if (EFI_ERROR (Status)) {
goto Done;
}
//
// Scan all the PCI devices on the primary bus of the PCI root bridge
//
for (Device = 0, NumberOfPciDevices = 0; Device <= PCI_MAX_DEVICE; Device++) {
for (Function = 0; Function <= PCI_MAX_FUNC; Function++) {
//
// Compute the PCI configuration address of the PCI device to probe
//
Address = EFI_PCI_ADDRESS (PrimaryBusIndex, Device, Function, 0);
//
// Read the Vendor ID from the PCI Configuration Header
//
Status = PrivateData->Io.Pci.Read (
&PrivateData->Io,
EfiPciWidthUint16,
Address,
sizeof (VendorId) / sizeof (UINT16),
&VendorId
);
if ((EFI_ERROR (Status)) || ((VendorId == 0xffff) && (Function == 0))) {
//
// If the PCI Configuration Read fails, or a PCI device does not exist, then
// skip this entire PCI device
//
break;
}
if (VendorId == 0xffff) {
//
// If PCI function != 0, VendorId == 0xFFFF, we continue to search PCI function.
//
continue;
}
//
// Read the entire PCI Configuration Header
//
Status = PrivateData->Io.Pci.Read (
&PrivateData->Io,
EfiPciWidthUint16,
Address,
sizeof (PciConfigurationHeader) / sizeof (UINT16),
&PciConfigurationHeader
);
if (EFI_ERROR (Status)) {
//
// If the entire PCI Configuration Header can not be read, then skip this entire PCI device
//
break;
}
//
// Increment the number of PCI device found on the primary bus of the PCI root bridge
//
NumberOfPciDevices++;
//
// Look for devices with the VGA Palette Snoop enabled in the COMMAND register of the PCI Config Header
//
if (PciConfigurationHeader.Hdr.Command & 0x20) {
PrivateData->Attributes |= EFI_PCI_ATTRIBUTE_VGA_PALETTE_IO;
}
//
// If the device is a PCI-PCI Bridge, then look at the Subordinate Bus Number
//
if (IS_PCI_BRIDGE(&PciConfigurationHeader)) {
//
// Get the Bus range that the PPB is decoding
//
if (PciConfigurationHeader.Bridge.P2PBridge.SubordinateBus > PrivateData->SubordinateBus) {
//
// If the suborinate bus number of the PCI-PCI bridge is greater than the PCI root bridge's
// current subordinate bus number, then update the PCI root bridge's subordinate bus number
//
PrivateData->SubordinateBus = PciConfigurationHeader.Bridge.P2PBridge.SubordinateBus;
}
//
// Get the I/O range that the PPB is decoding
//
Value = PciConfigurationHeader.Bridge.P2PBridge.IoBase & 0x0f;
Base = ((UINT32)PciConfigurationHeader.Bridge.P2PBridge.IoBase & 0xf0) << 8;
Limit = (((UINT32)PciConfigurationHeader.Bridge.P2PBridge.IoLimit & 0xf0) << 8) | 0x0fff;
if (Value == 0x01) {
Base |= ((UINT32)PciConfigurationHeader.Bridge.P2PBridge.IoBaseUpper16 << 16);
Limit |= ((UINT32)PciConfigurationHeader.Bridge.P2PBridge.IoLimitUpper16 << 16);
}
if (Base < Limit) {
if (PrivateData->IoBase > Base) {
PrivateData->IoBase = Base;
}
if (PrivateData->IoLimit < Limit) {
PrivateData->IoLimit = Limit;
}
}
//
// Get the Memory range that the PPB is decoding
//
Base = ((UINT32)PciConfigurationHeader.Bridge.P2PBridge.MemoryBase & 0xfff0) << 16;
Limit = (((UINT32)PciConfigurationHeader.Bridge.P2PBridge.MemoryLimit & 0xfff0) << 16) | 0xfffff;
if (Base < Limit) {
if (PrivateData->MemBase > Base) {
PrivateData->MemBase = Base;
}
if (PrivateData->MemLimit < Limit) {
PrivateData->MemLimit = Limit;
}
if (PrivateData->Mem32Base > Base) {
PrivateData->Mem32Base = Base;
}
if (PrivateData->Mem32Limit < Limit) {
PrivateData->Mem32Limit = Limit;
}
}
//
// Get the Prefetchable Memory range that the PPB is decoding
//
Value = PciConfigurationHeader.Bridge.P2PBridge.PrefetchableMemoryBase & 0x0f;
Base = ((UINT32)PciConfigurationHeader.Bridge.P2PBridge.PrefetchableMemoryBase & 0xfff0) << 16;
Limit = (((UINT32)PciConfigurationHeader.Bridge.P2PBridge.PrefetchableMemoryLimit & 0xfff0) << 16) | 0xffffff;
if (Value == 0x01) {
Base |= LShiftU64((UINT64)PciConfigurationHeader.Bridge.P2PBridge.PrefetchableBaseUpper32,32);
Limit |= LShiftU64((UINT64)PciConfigurationHeader.Bridge.P2PBridge.PrefetchableLimitUpper32,32);
}
if (Base < Limit) {
if (PrivateData->MemBase > Base) {
PrivateData->MemBase = Base;
}
if (PrivateData->MemLimit < Limit) {
PrivateData->MemLimit = Limit;
}
if (Value == 0x00) {
if (PrivateData->Pmem32Base > Base) {
PrivateData->Pmem32Base = Base;
}
if (PrivateData->Pmem32Limit < Limit) {
PrivateData->Pmem32Limit = Limit;
}
}
if (Value == 0x01) {
if (PrivateData->Pmem64Base > Base) {
PrivateData->Pmem64Base = Base;
}
if (PrivateData->Pmem64Limit < Limit) {
PrivateData->Pmem64Limit = Limit;
}
}
}
//
// Look at the PPB Configuration for legacy decoding attributes
//
if (PciConfigurationHeader.Bridge.P2PBridge.BridgeControl & 0x04) {
PrivateData->Attributes |= EFI_PCI_ATTRIBUTE_ISA_IO;
PrivateData->Attributes |= EFI_PCI_ATTRIBUTE_ISA_MOTHERBOARD_IO;
}
if (PciConfigurationHeader.Bridge.P2PBridge.BridgeControl & 0x08) {
// PrivateData->Attributes |= EFI_PCI_ATTRIBUTE_VGA_PALETTE_IO;
PrivateData->Attributes |= EFI_PCI_ATTRIBUTE_VGA_MEMORY;
PrivateData->Attributes |= EFI_PCI_ATTRIBUTE_VGA_IO;
}
} else if (IS_CARDBUS_BRIDGE(&PciConfigurationHeader)) {
//
// Get the Bus range that the PPB is decoding
//
if (PciConfigurationHeader.Bridge.CardBridge.SubordinateBusNumber > PrivateData->SubordinateBus) {
//
// If the suborinate bus number of the PCI-PCI bridge is greater than the PCI root bridge's
// current subordinate bus number, then update the PCI root bridge's subordinate bus number
//
PrivateData->SubordinateBus = PciConfigurationHeader.Bridge.CardBridge.SubordinateBusNumber;
}
//
// Get the I/O range that the PPB is decoding
//
Base = PciConfigurationHeader.Bridge.CardBridge.IoBase0;
Limit = PciConfigurationHeader.Bridge.CardBridge.IoLimit0;
if (Base < Limit) {
if (PrivateData->IoBase > Base) {
PrivateData->IoBase = Base;
}
if (PrivateData->IoLimit < Limit) {
PrivateData->IoLimit = Limit;
}
}
//
// Get the Memory range that the PPB is decoding
//
Base = PciConfigurationHeader.Bridge.CardBridge.MemoryBase0;
Limit = PciConfigurationHeader.Bridge.CardBridge.MemoryLimit0;
if (Base < Limit) {
if (PrivateData->MemBase > Base) {
PrivateData->MemBase = Base;
}
if (PrivateData->MemLimit < Limit) {
PrivateData->MemLimit = Limit;
}
if (PrivateData->Mem32Base > Base) {
PrivateData->Mem32Base = Base;
}
if (PrivateData->Mem32Limit < Limit) {
PrivateData->Mem32Limit = Limit;
}
}
} else
{
//
// Parse the BARs of the PCI device to determine what I/O Ranges,
// Memory Ranges, and Prefetchable Memory Ranges the device is decoding
//
if ((PciConfigurationHeader.Hdr.HeaderType & HEADER_LAYOUT_CODE) == HEADER_TYPE_DEVICE) {
Status = PcatPciRootBridgeParseBars (
PrivateData,
PciConfigurationHeader.Hdr.Command,
PrimaryBusIndex,
Device,
Function
);
}
//
// See if the PCI device is an IDE controller
//
if (PciConfigurationHeader.Hdr.ClassCode[2] == 0x01 &&
PciConfigurationHeader.Hdr.ClassCode[1] == 0x01 ) {
if (PciConfigurationHeader.Hdr.ClassCode[0] & 0x80) {
PrivateData->Attributes |= EFI_PCI_ATTRIBUTE_IDE_PRIMARY_IO;
PrivateData->Attributes |= EFI_PCI_ATTRIBUTE_IDE_SECONDARY_IO;
}
if (PciConfigurationHeader.Hdr.ClassCode[0] & 0x01) {
PrivateData->Attributes |= EFI_PCI_ATTRIBUTE_IDE_PRIMARY_IO;
}
if (PciConfigurationHeader.Hdr.ClassCode[0] & 0x04) {
PrivateData->Attributes |= EFI_PCI_ATTRIBUTE_IDE_SECONDARY_IO;
}
}
//
// See if the PCI device is a legacy VGA controller
//
if (PciConfigurationHeader.Hdr.ClassCode[2] == 0x00 &&
PciConfigurationHeader.Hdr.ClassCode[1] == 0x01 ) {
PrivateData->Attributes |= EFI_PCI_ATTRIBUTE_VGA_PALETTE_IO;
PrivateData->Attributes |= EFI_PCI_ATTRIBUTE_VGA_MEMORY;
PrivateData->Attributes |= EFI_PCI_ATTRIBUTE_VGA_IO;
}
//
// See if the PCI device is a standard VGA controller
//
if (PciConfigurationHeader.Hdr.ClassCode[2] == 0x03 &&
PciConfigurationHeader.Hdr.ClassCode[1] == 0x00 ) {
PrivateData->Attributes |= EFI_PCI_ATTRIBUTE_VGA_PALETTE_IO;
PrivateData->Attributes |= EFI_PCI_ATTRIBUTE_VGA_MEMORY;
PrivateData->Attributes |= EFI_PCI_ATTRIBUTE_VGA_IO;
}
//
// See if the PCI Device is a PCI - ISA or PCI - EISA
// or ISA_POSITIVIE_DECODE Bridge device
//
if (PciConfigurationHeader.Hdr.ClassCode[2] == 0x06) {
if (PciConfigurationHeader.Hdr.ClassCode[1] == 0x01 ||
PciConfigurationHeader.Hdr.ClassCode[1] == 0x02 ||
PciConfigurationHeader.Hdr.ClassCode[1] == 0x80 ) {
PrivateData->Attributes |= EFI_PCI_ATTRIBUTE_ISA_IO;
PrivateData->Attributes |= EFI_PCI_ATTRIBUTE_ISA_MOTHERBOARD_IO;
if (PrivateData->MemBase > 0xa0000) {
PrivateData->MemBase = 0xa0000;
}
if (PrivateData->MemLimit < 0xbffff) {
PrivateData->MemLimit = 0xbffff;
}
}
}
}
//
// If this device is not a multi function device, then skip the rest of this PCI device
//
if (Function == 0 && !(PciConfigurationHeader.Hdr.HeaderType & HEADER_TYPE_MULTI_FUNCTION)) {
break;
}
}
}
//
// After scanning all the PCI devices on the PCI root bridge's primary bus, update the
// Primary Bus Number for the next PCI root bridge to be this PCI root bridge's subordinate
// bus number + 1.
//
PrimaryBusIndex = PrivateData->SubordinateBus + 1;
//
// If at least one PCI device was found on the primary bus of this PCI root bridge, then the PCI root bridge
// exists.
//
if (NumberOfPciDevices > 0) {
//
// Adjust the I/O range used for bounds checking for the legacy decoding attributed
//
if (PrivateData->Attributes & 0x7f) {
PrivateData->IoBase = 0;
if (PrivateData->IoLimit < 0xffff) {
PrivateData->IoLimit = 0xffff;
}
}
//
// Adjust the Memory range used for bounds checking for the legacy decoding attributed
//
if (PrivateData->Attributes & EFI_PCI_ATTRIBUTE_VGA_MEMORY) {
if (PrivateData->MemBase > 0xa0000) {
PrivateData->MemBase = 0xa0000;
}
if (PrivateData->MemLimit < 0xbffff) {
PrivateData->MemLimit = 0xbffff;
}
}
//
// Build ACPI descriptors for the resources on the PCI Root Bridge
//
Status = ConstructConfiguration(PrivateData);
ASSERT_EFI_ERROR (Status);
//
// Create the handle for this PCI Root Bridge
//
Status = gBS->InstallMultipleProtocolInterfaces (
&PrivateData->Handle,
&gEfiDevicePathProtocolGuid,
PrivateData->DevicePath,
&gEfiPciRootBridgeIoProtocolGuid,
&PrivateData->Io,
NULL
);
ASSERT_EFI_ERROR (Status);
//
// Contruct DeviceIoProtocol
//
Status = DeviceIoConstructor (
PrivateData->Handle,
&PrivateData->Io,
PrivateData->DevicePath,
(UINT16)PrivateData->PrimaryBus,
(UINT16)PrivateData->SubordinateBus
);
ASSERT_EFI_ERROR (Status);
#if 0 //patch by nms42
//
// Scan this PCI Root Bridge for PCI Option ROMs and add them to the PCI Option ROM Table
//
Status = ScanPciRootBridgeForRoms(&PrivateData->Io);
#endif
//
// Increment the index for the next PCI Root Bridge
//
PciRootBridgeIndex++;
} else {
//
// If no PCI Root Bridges were found on the current PCI segment, then exit
//
if (NumberOfPciRootBridges == 0) {
Status = EFI_SUCCESS;
goto Done;
}
}
//
// If the PrimaryBusIndex is greater than the maximum allowable PCI bus number, then
// the PCI Segment Number is incremented, and the next segment is searched starting at Bus #0
// Otherwise, the search is continued on the next PCI Root Bridge
//
if (PrimaryBusIndex > PCI_MAX_BUS) {
PciSegmentIndex++;
NumberOfPciRootBridges = 0;
PrimaryBusIndex = 0;
} else {
NumberOfPciRootBridges++;
}
}
return EFI_SUCCESS;
Done:
//
// Clean up memory allocated for the PCI Root Bridge that was searched but not created.
//
if (PrivateData) {
if (PrivateData->DevicePath) {
gBS->FreePool(PrivateData->DevicePath);
}
gBS->FreePool (PrivateData);
}
//
// If no PCI Root Bridges were discovered, then return the error condition from scanning the
// first PCI Root Bridge
//
if (PciRootBridgeIndex == 0) {
return Status;
}
return EFI_SUCCESS;
}
