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audk/OvmfPkg/Csm/LegacyBiosDxe/LegacyBbs.c

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/** @file
Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "LegacyBiosInterface.h"
#include <IndustryStandard/Pci.h>
// Give floppy 3 states
// FLOPPY_PRESENT_WITH_MEDIA = Floppy controller present and media is inserted
// FLOPPY_NOT_PRESENT = No floppy controller present
// FLOPPY_PRESENT_NO_MEDIA = Floppy controller present but no media inserted
//
#define FLOPPY_NOT_PRESENT 0
#define FLOPPY_PRESENT_WITH_MEDIA 1
#define FLOPPY_PRESENT_NO_MEDIA 2
BBS_TABLE *mBbsTable;
BOOLEAN mBbsTableDoneFlag = FALSE;
BOOLEAN IsHaveMediaInFloppy = TRUE;
/**
Checks the state of the floppy and if media is inserted.
This routine checks the state of the floppy and if media is inserted.
There are 3 cases:
No floppy present - Set BBS entry to ignore
Floppy present & no media - Set BBS entry to lowest priority. We cannot
set it to ignore since 16-bit CSM will
indicate no floppy and thus drive A: is
unusable. CSM-16 will not try floppy since
lowest priority and thus not incur boot
time penality.
Floppy present & media - Set BBS entry to some priority.
@return State of floppy media
**/
UINT8
HasMediaInFloppy (
VOID
)
{
EFI_STATUS Status;
UINTN HandleCount;
EFI_HANDLE *HandleBuffer;
UINTN Index;
EFI_ISA_IO_PROTOCOL *IsaIo;
EFI_BLOCK_IO_PROTOCOL *BlkIo;
HandleBuffer = NULL;
HandleCount = 0;
gBS->LocateHandleBuffer (
ByProtocol,
&gEfiIsaIoProtocolGuid,
NULL,
&HandleCount,
&HandleBuffer
);
//
// If don't find any ISA/IO protocol assume no floppy. Need for floppy
// free system
//
if (HandleCount == 0) {
return FLOPPY_NOT_PRESENT;
}
ASSERT (HandleBuffer != NULL);
for (Index = 0; Index < HandleCount; Index++) {
Status = gBS->HandleProtocol (
HandleBuffer[Index],
&gEfiIsaIoProtocolGuid,
(VOID **) &IsaIo
);
if (EFI_ERROR (Status)) {
continue;
}
if (IsaIo->ResourceList->Device.HID != EISA_PNP_ID (0x604)) {
continue;
}
//
// Update blockio in case the floppy is inserted in during BdsTimeout
//
Status = gBS->DisconnectController (HandleBuffer[Index], NULL, NULL);
if (EFI_ERROR (Status)) {
continue;
}
Status = gBS->ConnectController (HandleBuffer[Index], NULL, NULL, TRUE);
if (EFI_ERROR (Status)) {
continue;
}
Status = gBS->HandleProtocol (
HandleBuffer[Index],
&gEfiBlockIoProtocolGuid,
(VOID **) &BlkIo
);
if (EFI_ERROR (Status)) {
continue;
}
if (BlkIo->Media->MediaPresent) {
FreePool (HandleBuffer);
return FLOPPY_PRESENT_WITH_MEDIA;
} else {
FreePool (HandleBuffer);
return FLOPPY_PRESENT_NO_MEDIA;
}
}
FreePool (HandleBuffer);
return FLOPPY_NOT_PRESENT;
}
/**
Complete build of BBS TABLE.
@param Private Legacy BIOS Instance data
@param BbsTable BBS Table passed to 16-bit code
@retval EFI_SUCCESS Removable media not present
**/
EFI_STATUS
LegacyBiosBuildBbs (
IN LEGACY_BIOS_INSTANCE *Private,
IN BBS_TABLE *BbsTable
)
{
UINTN BbsIndex;
HDD_INFO *HddInfo;
UINTN HddIndex;
UINTN Index;
EFI_HANDLE *BlockIoHandles;
UINTN NumberBlockIoHandles;
UINTN BlockIndex;
EFI_STATUS Status;
//
// First entry is floppy.
// Next 2*MAX_IDE_CONTROLLER entries are for onboard IDE.
// Next n entries are filled in after each ROM is dispatched.
// Entry filled in if follow BBS spec. See LegacyPci.c
// Next entries are for non-BBS compliant ROMS. They are filled in by
// 16-bit code during Legacy16UpdateBbs invocation. Final BootPriority
// occurs after that invocation.
//
// Floppy
// Set default state.
//
IsHaveMediaInFloppy = HasMediaInFloppy ();
if (IsHaveMediaInFloppy == FLOPPY_PRESENT_WITH_MEDIA) {
BbsTable[0].BootPriority = BBS_UNPRIORITIZED_ENTRY;
} else {
if (IsHaveMediaInFloppy == FLOPPY_PRESENT_NO_MEDIA) {
BbsTable[0].BootPriority = BBS_LOWEST_PRIORITY;
} else {
BbsTable[0].BootPriority = BBS_IGNORE_ENTRY;
}
}
BbsTable[0].Bus = 0xff;
BbsTable[0].Device = 0xff;
BbsTable[0].Function = 0xff;
BbsTable[0].DeviceType = BBS_FLOPPY;
BbsTable[0].Class = 01;
BbsTable[0].SubClass = 02;
BbsTable[0].StatusFlags.OldPosition = 0;
BbsTable[0].StatusFlags.Reserved1 = 0;
BbsTable[0].StatusFlags.Enabled = 0;
BbsTable[0].StatusFlags.Failed = 0;
BbsTable[0].StatusFlags.MediaPresent = 0;
BbsTable[0].StatusFlags.Reserved2 = 0;
//
// Onboard HDD - Note Each HDD controller controls 2 drives
// Master & Slave
//
HddInfo = &Private->IntThunk->EfiToLegacy16BootTable.HddInfo[0];
//
// Get IDE Drive Info
//
LegacyBiosBuildIdeData (Private, &HddInfo, 0);
for (HddIndex = 0; HddIndex < MAX_IDE_CONTROLLER; HddIndex++) {
BbsIndex = HddIndex * 2 + 1;
for (Index = 0; Index < 2; ++Index) {
BbsTable[BbsIndex + Index].Bus = HddInfo[HddIndex].Bus;
BbsTable[BbsIndex + Index].Device = HddInfo[HddIndex].Device;
BbsTable[BbsIndex + Index].Function = HddInfo[HddIndex].Function;
BbsTable[BbsIndex + Index].Class = 01;
BbsTable[BbsIndex + Index].SubClass = 01;
BbsTable[BbsIndex + Index].StatusFlags.OldPosition = 0;
BbsTable[BbsIndex + Index].StatusFlags.Reserved1 = 0;
BbsTable[BbsIndex + Index].StatusFlags.Enabled = 0;
BbsTable[BbsIndex + Index].StatusFlags.Failed = 0;
BbsTable[BbsIndex + Index].StatusFlags.MediaPresent = 0;
BbsTable[BbsIndex + Index].StatusFlags.Reserved2 = 0;
//
// If no controller found or no device found set to ignore
// else set to unprioritized and set device type
//
if (HddInfo[HddIndex].CommandBaseAddress == 0) {
BbsTable[BbsIndex + Index].BootPriority = BBS_IGNORE_ENTRY;
} else {
if (Index == 0) {
if ((HddInfo[HddIndex].Status & (HDD_MASTER_IDE | HDD_MASTER_ATAPI_CDROM | HDD_MASTER_ATAPI_ZIPDISK)) != 0) {
BbsTable[BbsIndex + Index].BootPriority = BBS_UNPRIORITIZED_ENTRY;
if ((HddInfo[HddIndex].Status & HDD_MASTER_IDE) != 0) {
BbsTable[BbsIndex + Index].DeviceType = BBS_HARDDISK;
} else if ((HddInfo[HddIndex].Status & HDD_MASTER_ATAPI_CDROM) != 0) {
BbsTable[BbsIndex + Index].DeviceType = BBS_CDROM;
} else {
//
// for ZIPDISK
//
BbsTable[BbsIndex + Index].DeviceType = BBS_HARDDISK;
}
} else {
BbsTable[BbsIndex + Index].BootPriority = BBS_IGNORE_ENTRY;
}
} else {
if ((HddInfo[HddIndex].Status & (HDD_SLAVE_IDE | HDD_SLAVE_ATAPI_CDROM | HDD_SLAVE_ATAPI_ZIPDISK)) != 0) {
BbsTable[BbsIndex + Index].BootPriority = BBS_UNPRIORITIZED_ENTRY;
if ((HddInfo[HddIndex].Status & HDD_SLAVE_IDE) != 0) {
BbsTable[BbsIndex + Index].DeviceType = BBS_HARDDISK;
} else if ((HddInfo[HddIndex].Status & HDD_SLAVE_ATAPI_CDROM) != 0) {
BbsTable[BbsIndex + Index].DeviceType = BBS_CDROM;
} else {
//
// for ZIPDISK
//
BbsTable[BbsIndex + Index].DeviceType = BBS_HARDDISK;
}
} else {
BbsTable[BbsIndex + Index].BootPriority = BBS_IGNORE_ENTRY;
}
}
}
}
}
//
// Add non-IDE block devices
//
BbsIndex = HddIndex * 2 + 1;
Status = gBS->LocateHandleBuffer (
ByProtocol,
&gEfiBlockIoProtocolGuid,
NULL,
&NumberBlockIoHandles,
&BlockIoHandles
);
if (!EFI_ERROR (Status)) {
UINTN Removable;
EFI_BLOCK_IO_PROTOCOL *BlkIo;
EFI_PCI_IO_PROTOCOL *PciIo;
EFI_DEVICE_PATH_PROTOCOL *DevicePath;
EFI_DEVICE_PATH_PROTOCOL *DevicePathNode;
EFI_HANDLE PciHandle;
UINTN SegNum;
UINTN BusNum;
UINTN DevNum;
UINTN FuncNum;
for (Removable = 0; Removable < 2; Removable++) {
for (BlockIndex = 0; BlockIndex < NumberBlockIoHandles; BlockIndex++) {
Status = gBS->HandleProtocol (
BlockIoHandles[BlockIndex],
&gEfiBlockIoProtocolGuid,
(VOID **) &BlkIo
);
if (EFI_ERROR (Status)) {
continue;
}
//
// Skip the logical partitions
//
if (BlkIo->Media->LogicalPartition) {
continue;
}
//
// Skip the fixed block io then the removable block io
//
if (BlkIo->Media->RemovableMedia == ((Removable == 0) ? FALSE : TRUE)) {
continue;
}
//
// Get Device Path
//
Status = gBS->HandleProtocol (
BlockIoHandles[BlockIndex],
&gEfiDevicePathProtocolGuid,
(VOID **) &DevicePath
);
if (EFI_ERROR (Status)) {
continue;
}
//
// Skip ATA devices as they have already been handled
//
DevicePathNode = DevicePath;
while (!IsDevicePathEnd (DevicePathNode)) {
if (DevicePathType (DevicePathNode) == MESSAGING_DEVICE_PATH &&
DevicePathSubType (DevicePathNode) == MSG_ATAPI_DP) {
break;
}
DevicePathNode = NextDevicePathNode (DevicePathNode);
}
if (!IsDevicePathEnd (DevicePathNode)) {
continue;
}
//
// Locate which PCI device
//
Status = gBS->LocateDevicePath (
&gEfiPciIoProtocolGuid,
&DevicePath,
&PciHandle
);
if (EFI_ERROR (Status)) {
continue;
}
Status = gBS->HandleProtocol (
PciHandle,
&gEfiPciIoProtocolGuid,
(VOID **) &PciIo
);
if (EFI_ERROR (Status)) {
continue;
}
Status = PciIo->GetLocation (
PciIo,
&SegNum,
&BusNum,
&DevNum,
&FuncNum
);
if (EFI_ERROR (Status)) {
continue;
}
if (SegNum != 0) {
DEBUG ((DEBUG_WARN, "CSM cannot use PCI devices in segment %Lu\n",
(UINT64) SegNum));
continue;
}
DEBUG ((DEBUG_INFO, "Add Legacy Bbs entry for PCI %d/%d/%d\n",
BusNum, DevNum, FuncNum));
BbsTable[BbsIndex].Bus = BusNum;
BbsTable[BbsIndex].Device = DevNum;
BbsTable[BbsIndex].Function = FuncNum;
BbsTable[BbsIndex].Class = 1;
BbsTable[BbsIndex].SubClass = 0x80;
BbsTable[BbsIndex].StatusFlags.OldPosition = 0;
BbsTable[BbsIndex].StatusFlags.Reserved1 = 0;
BbsTable[BbsIndex].StatusFlags.Enabled = 0;
BbsTable[BbsIndex].StatusFlags.Failed = 0;
BbsTable[BbsIndex].StatusFlags.MediaPresent = 0;
BbsTable[BbsIndex].StatusFlags.Reserved2 = 0;
BbsTable[BbsIndex].DeviceType = BBS_HARDDISK;
BbsTable[BbsIndex].BootPriority = BBS_UNPRIORITIZED_ENTRY;
BbsIndex++;
if (BbsIndex == MAX_BBS_ENTRIES) {
Removable = 2;
break;
}
}
}
FreePool (BlockIoHandles);
}
return EFI_SUCCESS;
}
/**
Get all BBS info
@param This Protocol instance pointer.
@param HddCount Number of HDD_INFO structures
@param HddInfo Onboard IDE controller information
@param BbsCount Number of BBS_TABLE structures
@param BbsTable List BBS entries
@retval EFI_SUCCESS Tables returned
@retval EFI_NOT_FOUND resource not found
@retval EFI_DEVICE_ERROR can not get BBS table
**/
EFI_STATUS
EFIAPI
LegacyBiosGetBbsInfo (
IN EFI_LEGACY_BIOS_PROTOCOL *This,
OUT UINT16 *HddCount,
OUT HDD_INFO **HddInfo,
OUT UINT16 *BbsCount,
OUT BBS_TABLE **BbsTable
)
{
LEGACY_BIOS_INSTANCE *Private;
EFI_IA32_REGISTER_SET Regs;
EFI_TO_COMPATIBILITY16_BOOT_TABLE *EfiToLegacy16BootTable;
// HDD_INFO *LocalHddInfo;
// IN BBS_TABLE *LocalBbsTable;
UINTN NumHandles;
EFI_HANDLE *HandleBuffer;
UINTN Index;
UINTN TempData;
UINT32 Granularity;
HandleBuffer = NULL;
Private = LEGACY_BIOS_INSTANCE_FROM_THIS (This);
EfiToLegacy16BootTable = &Private->IntThunk->EfiToLegacy16BootTable;
// LocalHddInfo = EfiToLegacy16BootTable->HddInfo;
// LocalBbsTable = (BBS_TABLE*)(UINTN)EfiToLegacy16BootTable->BbsTable;
if (!mBbsTableDoneFlag) {
mBbsTable = Private->BbsTablePtr;
//
// Always enable disk controllers so 16-bit CSM code has valid information for all
// drives.
//
//
// Get PciRootBridgeIO protocol
//
gBS->LocateHandleBuffer (
ByProtocol,
&gEfiPciRootBridgeIoProtocolGuid,
NULL,
&NumHandles,
&HandleBuffer
);
if (NumHandles == 0) {
return EFI_NOT_FOUND;
}
mBbsTableDoneFlag = TRUE;
for (Index = 0; Index < NumHandles; Index++) {
//
// Connect PciRootBridgeIO protocol handle with FALSE parameter to let
// PCI bus driver enumerate all subsequent handles
//
gBS->ConnectController (HandleBuffer[Index], NULL, NULL, FALSE);
}
LegacyBiosBuildBbs (Private, mBbsTable);
Private->LegacyRegion->UnLock (Private->LegacyRegion, 0xe0000, 0x20000, &Granularity);
//
// Call into Legacy16 code to add to BBS table for non BBS compliant OPROMs.
//
ZeroMem (&Regs, sizeof (EFI_IA32_REGISTER_SET));
Regs.X.AX = Legacy16UpdateBbs;
//
// Pass in handoff data
//
TempData = (UINTN) EfiToLegacy16BootTable;
Regs.X.ES = NORMALIZE_EFI_SEGMENT ((UINT32) TempData);
Regs.X.BX = NORMALIZE_EFI_OFFSET ((UINT32) TempData);
Private->LegacyBios.FarCall86 (
This,
Private->Legacy16CallSegment,
Private->Legacy16CallOffset,
&Regs,
NULL,
0
);
Private->Cpu->FlushDataCache (Private->Cpu, 0xE0000, 0x20000, EfiCpuFlushTypeWriteBackInvalidate);
Private->LegacyRegion->Lock (Private->LegacyRegion, 0xe0000, 0x20000, &Granularity);
if (Regs.X.AX != 0) {
return EFI_DEVICE_ERROR;
}
}
if (HandleBuffer != NULL) {
FreePool (HandleBuffer);
}
*HddCount = MAX_IDE_CONTROLLER;
*HddInfo = EfiToLegacy16BootTable->HddInfo;
*BbsTable = (BBS_TABLE*)(UINTN)EfiToLegacy16BootTable->BbsTable;
*BbsCount = (UINT16) (sizeof (Private->IntThunk->BbsTable) / sizeof (BBS_TABLE));
return EFI_SUCCESS;
}
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