diff options
Diffstat (limited to 'OvmfPkg/Csm/LegacyBiosDxe/LegacyBbs.c')
| -rw-r--r-- | OvmfPkg/Csm/LegacyBiosDxe/LegacyBbs.c | 377 |
1 files changed, 377 insertions, 0 deletions
diff --git a/OvmfPkg/Csm/LegacyBiosDxe/LegacyBbs.c b/OvmfPkg/Csm/LegacyBiosDxe/LegacyBbs.c new file mode 100644 index 0000000000..6b1dd344f3 --- /dev/null +++ b/OvmfPkg/Csm/LegacyBiosDxe/LegacyBbs.c @@ -0,0 +1,377 @@ +/** @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;
+
+ //
+ // 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;
+ }
+ }
+ }
+ }
+ }
+
+ 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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