2011-06-28 01:32:56 +02:00
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/** @file
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2013-03-15 02:34:21 +01:00
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Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>
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2011-06-28 01:32:56 +02:00
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This program and the accompanying materials
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are licensed and made available under the terms and conditions
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of the BSD License which accompanies this distribution. The
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full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#ifndef _LEGACY_BIOS_INTERFACE_
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#define _LEGACY_BIOS_INTERFACE_
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#include <FrameworkDxe.h>
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2012-11-21 04:03:32 +01:00
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#include <IndustryStandard/Pci.h>
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2013-12-05 06:30:27 +01:00
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#include <IndustryStandard/SmBios.h>
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2011-06-28 01:32:56 +02:00
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#include <Guid/SmBios.h>
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#include <Guid/Acpi.h>
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#include <Guid/DxeServices.h>
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#include <Guid/LegacyBios.h>
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#include <Guid/StatusCodeDataTypeId.h>
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2012-07-17 11:25:26 +02:00
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#include <Guid/ImageAuthentication.h>
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2011-06-28 01:32:56 +02:00
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#include <Protocol/BlockIo.h>
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#include <Protocol/LoadedImage.h>
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#include <Protocol/PciIo.h>
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#include <Protocol/Cpu.h>
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2011-08-30 07:52:28 +02:00
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#include <Protocol/Timer.h>
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2011-06-28 01:32:56 +02:00
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#include <Protocol/IsaIo.h>
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#include <Protocol/LegacyRegion2.h>
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#include <Protocol/SimpleTextIn.h>
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#include <Protocol/LegacyInterrupt.h>
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#include <Protocol/LegacyBios.h>
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#include <Protocol/DiskInfo.h>
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#include <Protocol/GenericMemoryTest.h>
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#include <Protocol/LegacyBiosPlatform.h>
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#include <Protocol/DevicePath.h>
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#include <Protocol/Legacy8259.h>
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#include <Protocol/PciRootBridgeIo.h>
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#include <Library/BaseLib.h>
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#include <Library/DebugLib.h>
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#include <Library/UefiLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/ReportStatusCodeLib.h>
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#include <Library/UefiRuntimeServicesTableLib.h>
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#include <Library/HobLib.h>
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#include <Library/UefiDriverEntryPoint.h>
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#include <Library/MemoryAllocationLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/IoLib.h>
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#include <Library/PcdLib.h>
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#include <Library/DevicePathLib.h>
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#include <Library/DxeServicesTableLib.h>
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#include <Library/PeCoffLib.h>
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#include <Library/CacheMaintenanceLib.h>
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#include <Library/DebugAgentLib.h>
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//
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// BUGBUG: This entry maybe changed to PCD in future and wait for
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// redesign of BDS library
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//
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#define MAX_BBS_ENTRIES 0x100
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//
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// Thunk Status Codes
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// (These apply only to errors with the thunk and not to the code that was
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// thunked to.)
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//
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#define THUNK_OK 0x00
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#define THUNK_ERR_A20_UNSUP 0x01
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#define THUNK_ERR_A20_FAILED 0x02
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//
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// Vector base definitions
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//
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//
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// 8259 Hardware definitions
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//
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#define LEGACY_MODE_BASE_VECTOR_MASTER 0x08
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#define LEGACY_MODE_BASE_VECTOR_SLAVE 0x70
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//
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// The original PC used INT8-F for master PIC. Since these mapped over
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// processor exceptions TIANO moved the master PIC to INT68-6F.
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//
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// The vector base for slave PIC is set as 0x70 for PC-AT compatibility.
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//
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#define PROTECTED_MODE_BASE_VECTOR_MASTER 0x68
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#define PROTECTED_MODE_BASE_VECTOR_SLAVE 0x70
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2012-03-01 12:16:42 +01:00
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//
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// When we call CSM16 functions, some CSM16 use es:[offset + 0xabcd] to get data passed from CSM32,
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// offset + 0xabcd could overflow which exceeds 0xFFFF which is invalid in real mode.
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// So this will keep offset as small as possible to avoid offset overflow in real mode.
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//
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#define NORMALIZE_EFI_SEGMENT(_Adr) (UINT16) (((UINTN) (_Adr)) >> 4)
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#define NORMALIZE_EFI_OFFSET(_Adr) (UINT16) (((UINT16) ((UINTN) (_Adr))) & 0xf)
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2011-06-28 01:32:56 +02:00
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//
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// Trace defines
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//
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//
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#define LEGACY_BDA_TRACE 0x000
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#define LEGACY_BIOS_TRACE 0x040
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#define LEGACY_BOOT_TRACE 0x080
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#define LEGACY_CMOS_TRACE 0x0C0
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#define LEGACY_IDE_TRACE 0x100
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#define LEGACY_MP_TRACE 0x140
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#define LEGACY_PCI_TRACE 0x180
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#define LEGACY_SIO_TRACE 0x1C0
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#define LEGACY_PCI_TRACE_000 LEGACY_PCI_TRACE + 0x00
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#define LEGACY_PCI_TRACE_001 LEGACY_PCI_TRACE + 0x01
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#define LEGACY_PCI_TRACE_002 LEGACY_PCI_TRACE + 0x02
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#define LEGACY_PCI_TRACE_003 LEGACY_PCI_TRACE + 0x03
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#define LEGACY_PCI_TRACE_004 LEGACY_PCI_TRACE + 0x04
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#define LEGACY_PCI_TRACE_005 LEGACY_PCI_TRACE + 0x05
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#define LEGACY_PCI_TRACE_006 LEGACY_PCI_TRACE + 0x06
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#define LEGACY_PCI_TRACE_007 LEGACY_PCI_TRACE + 0x07
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#define LEGACY_PCI_TRACE_008 LEGACY_PCI_TRACE + 0x08
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#define LEGACY_PCI_TRACE_009 LEGACY_PCI_TRACE + 0x09
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#define LEGACY_PCI_TRACE_00A LEGACY_PCI_TRACE + 0x0A
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#define LEGACY_PCI_TRACE_00B LEGACY_PCI_TRACE + 0x0B
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#define LEGACY_PCI_TRACE_00C LEGACY_PCI_TRACE + 0x0C
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#define LEGACY_PCI_TRACE_00D LEGACY_PCI_TRACE + 0x0D
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#define LEGACY_PCI_TRACE_00E LEGACY_PCI_TRACE + 0x0E
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#define LEGACY_PCI_TRACE_00F LEGACY_PCI_TRACE + 0x0F
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2012-08-13 11:33:49 +02:00
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#define BDA_VIDEO_MODE 0x49
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2011-06-28 01:32:56 +02:00
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2012-11-20 01:59:17 +01:00
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#define IDE_PI_REGISTER_PNE BIT0
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#define IDE_PI_REGISTER_SNE BIT2
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2011-06-28 01:32:56 +02:00
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typedef struct {
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UINTN PciSegment;
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UINTN PciBus;
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UINTN PciDevice;
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UINTN PciFunction;
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UINT32 ShadowAddress;
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UINT32 ShadowedSize;
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UINT8 DiskStart;
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UINT8 DiskEnd;
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} ROM_INSTANCE_ENTRY;
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//
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// Values for RealModeGdt
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//
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#if defined (MDE_CPU_IA32)
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#define NUM_REAL_GDT_ENTRIES 3
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#define CONVENTIONAL_MEMORY_TOP 0xA0000 // 640 KB
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#define INITIAL_VALUE_BELOW_1K 0x0
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#elif defined (MDE_CPU_X64)
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#define NUM_REAL_GDT_ENTRIES 8
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#define CONVENTIONAL_MEMORY_TOP 0xA0000 // 640 KB
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#define INITIAL_VALUE_BELOW_1K 0x0
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#elif defined (MDE_CPU_IPF)
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#define NUM_REAL_GDT_ENTRIES 3
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#define CONVENTIONAL_MEMORY_TOP 0x80000 // 512 KB
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#define INITIAL_VALUE_BELOW_1K 0xff
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#endif
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#pragma pack(1)
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//
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// Define what a processor GDT looks like
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//
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typedef struct {
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UINT32 LimitLo : 16;
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UINT32 BaseLo : 16;
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UINT32 BaseMid : 8;
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UINT32 Type : 4;
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UINT32 System : 1;
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UINT32 Dpl : 2;
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UINT32 Present : 1;
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UINT32 LimitHi : 4;
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UINT32 Software : 1;
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UINT32 Reserved : 1;
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UINT32 DefaultSize : 1;
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UINT32 Granularity : 1;
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UINT32 BaseHi : 8;
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} GDT32;
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typedef struct {
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UINT16 LimitLow;
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UINT16 BaseLow;
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UINT8 BaseMid;
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UINT8 Attribute;
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UINT8 LimitHi;
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UINT8 BaseHi;
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} GDT64;
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//
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// Define what a processor descriptor looks like
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// This data structure must be kept in sync with ASM STRUCT in Thunk.inc
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//
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typedef struct {
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UINT16 Limit;
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UINT64 Base;
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} DESCRIPTOR64;
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typedef struct {
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UINT16 Limit;
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UINT32 Base;
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} DESCRIPTOR32;
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//
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// Low stub lay out
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//
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#define LOW_STACK_SIZE (8 * 1024) // 8k?
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#define EFI_MAX_E820_ENTRY 100
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#define FIRST_INSTANCE 1
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#define NOT_FIRST_INSTANCE 0
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#if defined (MDE_CPU_IA32)
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typedef struct {
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//
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// Space for the code
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// The address of Code is also the beginning of the relocated Thunk code
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//
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CHAR8 Code[4096]; // ?
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//
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// The address of the Reverse Thunk code
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// Note that this member CONTAINS the address of the relocated reverse thunk
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// code unlike the member variable 'Code', which IS the address of the Thunk
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// code.
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//
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UINT32 LowReverseThunkStart;
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//
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// Data for the code (cs releative)
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//
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DESCRIPTOR32 GdtDesc; // Protected mode GDT
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DESCRIPTOR32 IdtDesc; // Protected mode IDT
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UINT32 FlatSs;
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UINT32 FlatEsp;
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UINT32 LowCodeSelector; // Low code selector in GDT
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UINT32 LowDataSelector; // Low data selector in GDT
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UINT32 LowStack;
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DESCRIPTOR32 RealModeIdtDesc;
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//
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// real-mode GDT (temporary GDT with two real mode segment descriptors)
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//
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GDT32 RealModeGdt[NUM_REAL_GDT_ENTRIES];
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DESCRIPTOR32 RealModeGdtDesc;
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//
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// Members specifically for the reverse thunk
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// The RevReal* members are used to store the current state of real mode
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// before performing the reverse thunk. The RevFlat* members must be set
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// before calling the reverse thunk assembly code.
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//
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UINT16 RevRealDs;
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UINT16 RevRealSs;
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UINT32 RevRealEsp;
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DESCRIPTOR32 RevRealIdtDesc;
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UINT16 RevFlatDataSelector; // Flat data selector in GDT
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UINT32 RevFlatStack;
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//
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// A low memory stack
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//
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CHAR8 Stack[LOW_STACK_SIZE];
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//
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// Stack for flat mode after reverse thunk
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// @bug - This may no longer be necessary if the reverse thunk interface
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// is changed to have the flat stack in a different location.
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//
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CHAR8 RevThunkStack[LOW_STACK_SIZE];
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//
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// Legacy16 Init memory map info
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//
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EFI_TO_COMPATIBILITY16_INIT_TABLE EfiToLegacy16InitTable;
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EFI_TO_COMPATIBILITY16_BOOT_TABLE EfiToLegacy16BootTable;
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CHAR8 InterruptRedirectionCode[32];
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EFI_LEGACY_INSTALL_PCI_HANDLER PciHandler;
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EFI_DISPATCH_OPROM_TABLE DispatchOpromTable;
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BBS_TABLE BbsTable[MAX_BBS_ENTRIES];
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} LOW_MEMORY_THUNK;
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#elif defined (MDE_CPU_X64)
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typedef struct {
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//
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// Space for the code
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// The address of Code is also the beginning of the relocated Thunk code
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//
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CHAR8 Code[4096]; // ?
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//
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// Data for the code (cs releative)
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//
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DESCRIPTOR64 X64GdtDesc; // Protected mode GDT
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DESCRIPTOR64 X64IdtDesc; // Protected mode IDT
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UINTN X64Ss;
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UINTN X64Esp;
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|
|
|
UINTN RealStack;
|
|
|
|
|
DESCRIPTOR32 RealModeIdtDesc;
|
|
|
|
|
DESCRIPTOR32 RealModeGdtDesc;
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// real-mode GDT (temporary GDT with two real mode segment descriptors)
|
|
|
|
|
//
|
|
|
|
|
GDT64 RealModeGdt[NUM_REAL_GDT_ENTRIES];
|
|
|
|
|
UINT64 PageMapLevel4;
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// A low memory stack
|
|
|
|
|
//
|
|
|
|
|
CHAR8 Stack[LOW_STACK_SIZE];
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// Legacy16 Init memory map info
|
|
|
|
|
//
|
|
|
|
|
EFI_TO_COMPATIBILITY16_INIT_TABLE EfiToLegacy16InitTable;
|
|
|
|
|
|
|
|
|
|
EFI_TO_COMPATIBILITY16_BOOT_TABLE EfiToLegacy16BootTable;
|
|
|
|
|
|
|
|
|
|
CHAR8 InterruptRedirectionCode[32];
|
|
|
|
|
EFI_LEGACY_INSTALL_PCI_HANDLER PciHandler;
|
|
|
|
|
EFI_DISPATCH_OPROM_TABLE DispatchOpromTable;
|
|
|
|
|
BBS_TABLE BbsTable[MAX_BBS_ENTRIES];
|
|
|
|
|
} LOW_MEMORY_THUNK;
|
|
|
|
|
|
|
|
|
|
#elif defined (MDE_CPU_IPF)
|
|
|
|
|
|
|
|
|
|
typedef struct {
|
|
|
|
|
//
|
|
|
|
|
// Space for the code
|
|
|
|
|
// The address of Code is also the beginning of the relocated Thunk code
|
|
|
|
|
//
|
|
|
|
|
CHAR8 Code[4096]; // ?
|
|
|
|
|
//
|
|
|
|
|
// The address of the Reverse Thunk code
|
|
|
|
|
// Note that this member CONTAINS the address of the relocated reverse thunk
|
|
|
|
|
// code unlike the member variable 'Code', which IS the address of the Thunk
|
|
|
|
|
// code.
|
|
|
|
|
//
|
|
|
|
|
UINT32 LowReverseThunkStart;
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// Data for the code (cs releative)
|
|
|
|
|
//
|
|
|
|
|
DESCRIPTOR32 GdtDesc; // Protected mode GDT
|
|
|
|
|
DESCRIPTOR32 IdtDesc; // Protected mode IDT
|
|
|
|
|
UINT32 FlatSs;
|
|
|
|
|
UINT32 FlatEsp;
|
|
|
|
|
|
|
|
|
|
UINT32 LowCodeSelector; // Low code selector in GDT
|
|
|
|
|
UINT32 LowDataSelector; // Low data selector in GDT
|
|
|
|
|
UINT32 LowStack;
|
|
|
|
|
DESCRIPTOR32 RealModeIdtDesc;
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// real-mode GDT (temporary GDT with two real mode segment descriptors)
|
|
|
|
|
//
|
|
|
|
|
GDT32 RealModeGdt[NUM_REAL_GDT_ENTRIES];
|
|
|
|
|
DESCRIPTOR32 RealModeGdtDesc;
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// Members specifically for the reverse thunk
|
|
|
|
|
// The RevReal* members are used to store the current state of real mode
|
|
|
|
|
// before performing the reverse thunk. The RevFlat* members must be set
|
|
|
|
|
// before calling the reverse thunk assembly code.
|
|
|
|
|
//
|
|
|
|
|
UINT16 RevRealDs;
|
|
|
|
|
UINT16 RevRealSs;
|
|
|
|
|
UINT32 RevRealEsp;
|
|
|
|
|
DESCRIPTOR32 RevRealIdtDesc;
|
|
|
|
|
UINT16 RevFlatDataSelector; // Flat data selector in GDT
|
|
|
|
|
UINT32 RevFlatStack;
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// A low memory stack
|
|
|
|
|
//
|
|
|
|
|
CHAR8 Stack[LOW_STACK_SIZE];
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// Stack for flat mode after reverse thunk
|
|
|
|
|
// @bug - This may no longer be necessary if the reverse thunk interface
|
|
|
|
|
// is changed to have the flat stack in a different location.
|
|
|
|
|
//
|
|
|
|
|
CHAR8 RevThunkStack[LOW_STACK_SIZE];
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// Legacy16 Init memory map info
|
|
|
|
|
//
|
|
|
|
|
EFI_TO_COMPATIBILITY16_INIT_TABLE EfiToLegacy16InitTable;
|
|
|
|
|
|
|
|
|
|
EFI_TO_COMPATIBILITY16_BOOT_TABLE EfiToLegacy16BootTable;
|
|
|
|
|
|
|
|
|
|
CHAR8 InterruptRedirectionCode[32];
|
|
|
|
|
EFI_LEGACY_INSTALL_PCI_HANDLER PciHandler;
|
|
|
|
|
EFI_DISPATCH_OPROM_TABLE DispatchOpromTable;
|
|
|
|
|
BBS_TABLE BbsTable[MAX_BBS_ENTRIES];
|
|
|
|
|
} LOW_MEMORY_THUNK;
|
|
|
|
|
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// PnP Expansion Header
|
|
|
|
|
//
|
|
|
|
|
typedef struct {
|
|
|
|
|
UINT32 PnpSignature;
|
|
|
|
|
UINT8 Revision;
|
|
|
|
|
UINT8 Length;
|
|
|
|
|
UINT16 NextHeader;
|
|
|
|
|
UINT8 Reserved1;
|
|
|
|
|
UINT8 Checksum;
|
|
|
|
|
UINT32 DeviceId;
|
|
|
|
|
UINT16 MfgPointer;
|
|
|
|
|
UINT16 ProductNamePointer;
|
|
|
|
|
UINT8 Class;
|
|
|
|
|
UINT8 SubClass;
|
|
|
|
|
UINT8 Interface;
|
|
|
|
|
UINT8 DeviceIndicators;
|
|
|
|
|
UINT16 Bcv;
|
|
|
|
|
UINT16 DisconnectVector;
|
|
|
|
|
UINT16 Bev;
|
|
|
|
|
UINT16 Reserved2;
|
|
|
|
|
UINT16 StaticResourceVector;
|
|
|
|
|
} LEGACY_PNP_EXPANSION_HEADER;
|
|
|
|
|
|
|
|
|
|
typedef struct {
|
|
|
|
|
UINT8 PciSegment;
|
|
|
|
|
UINT8 PciBus;
|
|
|
|
|
UINT8 PciDevice;
|
|
|
|
|
UINT8 PciFunction;
|
|
|
|
|
UINT16 Vid;
|
|
|
|
|
UINT16 Did;
|
|
|
|
|
UINT16 SysSid;
|
|
|
|
|
UINT16 SVid;
|
|
|
|
|
UINT8 Class;
|
|
|
|
|
UINT8 SubClass;
|
|
|
|
|
UINT8 Interface;
|
|
|
|
|
UINT8 Reserved;
|
|
|
|
|
UINTN RomStart;
|
|
|
|
|
UINTN ManufacturerString;
|
|
|
|
|
UINTN ProductNameString;
|
|
|
|
|
} LEGACY_ROM_AND_BBS_TABLE;
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// Structure how EFI has mapped a devices HDD drive numbers.
|
|
|
|
|
// Boot to EFI aware OS or shell requires this mapping when
|
|
|
|
|
// 16-bit CSM assigns drive numbers.
|
|
|
|
|
// This mapping is ignored booting to a legacy OS.
|
|
|
|
|
//
|
|
|
|
|
typedef struct {
|
|
|
|
|
UINT8 PciSegment;
|
|
|
|
|
UINT8 PciBus;
|
|
|
|
|
UINT8 PciDevice;
|
|
|
|
|
UINT8 PciFunction;
|
|
|
|
|
UINT8 StartDriveNumber;
|
|
|
|
|
UINT8 EndDriveNumber;
|
|
|
|
|
} LEGACY_EFI_HDD_TABLE;
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// This data is passed to Leacy16Boot
|
|
|
|
|
//
|
|
|
|
|
typedef enum {
|
|
|
|
|
EfiAcpiAddressRangeMemory = 1,
|
|
|
|
|
EfiAcpiAddressRangeReserved = 2,
|
|
|
|
|
EfiAcpiAddressRangeACPI = 3,
|
|
|
|
|
EfiAcpiAddressRangeNVS = 4
|
|
|
|
|
} EFI_ACPI_MEMORY_TYPE;
|
|
|
|
|
|
|
|
|
|
typedef struct {
|
|
|
|
|
UINT64 BaseAddr;
|
|
|
|
|
UINT64 Length;
|
|
|
|
|
EFI_ACPI_MEMORY_TYPE Type;
|
|
|
|
|
} EFI_E820_ENTRY64;
|
|
|
|
|
|
|
|
|
|
typedef struct {
|
|
|
|
|
UINT32 BassAddrLow;
|
|
|
|
|
UINT32 BaseAddrHigh;
|
|
|
|
|
UINT32 LengthLow;
|
|
|
|
|
UINT32 LengthHigh;
|
|
|
|
|
EFI_ACPI_MEMORY_TYPE Type;
|
|
|
|
|
} EFI_E820_ENTRY;
|
|
|
|
|
|
|
|
|
|
#pragma pack()
|
|
|
|
|
|
|
|
|
|
extern BBS_TABLE *mBbsTable;
|
|
|
|
|
|
|
|
|
|
extern EFI_GENERIC_MEMORY_TEST_PROTOCOL *gGenMemoryTest;
|
|
|
|
|
|
|
|
|
|
#define PORT_70 0x70
|
|
|
|
|
#define PORT_71 0x71
|
|
|
|
|
|
|
|
|
|
#define CMOS_0A 0x0a ///< Status register A
|
|
|
|
|
#define CMOS_0D 0x0d ///< Status register D
|
|
|
|
|
#define CMOS_0E 0x0e ///< Diagnostic Status
|
|
|
|
|
#define CMOS_0F 0x0f ///< Shutdown status
|
|
|
|
|
#define CMOS_10 0x10 ///< Floppy type
|
|
|
|
|
#define CMOS_12 0x12 ///< IDE type
|
|
|
|
|
#define CMOS_14 0x14 ///< Same as BDA 40:10
|
|
|
|
|
#define CMOS_15 0x15 ///< Low byte of base memory in 1k increments
|
|
|
|
|
#define CMOS_16 0x16 ///< High byte of base memory in 1k increments
|
|
|
|
|
#define CMOS_17 0x17 ///< Low byte of 1MB+ memory in 1k increments - max 15 MB
|
|
|
|
|
#define CMOS_18 0x18 ///< High byte of 1MB+ memory in 1k increments - max 15 MB
|
|
|
|
|
#define CMOS_19 0x19 ///< C: extended drive type
|
|
|
|
|
#define CMOS_1A 0x1a ///< D: extended drive type
|
|
|
|
|
#define CMOS_2E 0x2e ///< Most significient byte of standard checksum
|
|
|
|
|
#define CMOS_2F 0x2f ///< Least significient byte of standard checksum
|
|
|
|
|
#define CMOS_30 0x30 ///< CMOS 0x17
|
|
|
|
|
#define CMOS_31 0x31 ///< CMOS 0x18
|
|
|
|
|
#define CMOS_32 0x32 ///< Century byte
|
|
|
|
|
|
2011-08-30 07:52:28 +02:00
|
|
|
//
|
|
|
|
|
// 8254 Timer registers
|
|
|
|
|
//
|
|
|
|
|
#define TIMER0_COUNT_PORT 0x40
|
|
|
|
|
#define TIMER1_COUNT_PORT 0x41
|
|
|
|
|
#define TIMER2_COUNT_PORT 0x42
|
|
|
|
|
#define TIMER_CONTROL_PORT 0x43
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// Timer 0, Read/Write LSB then MSB, Square wave output, binary count use.
|
|
|
|
|
//
|
|
|
|
|
#define TIMER0_CONTROL_WORD 0x36
|
2011-06-28 01:32:56 +02:00
|
|
|
|
|
|
|
|
#define LEGACY_BIOS_INSTANCE_SIGNATURE SIGNATURE_32 ('L', 'B', 'I', 'T')
|
|
|
|
|
typedef struct {
|
|
|
|
|
UINTN Signature;
|
|
|
|
|
|
|
|
|
|
EFI_HANDLE Handle;
|
|
|
|
|
EFI_LEGACY_BIOS_PROTOCOL LegacyBios;
|
|
|
|
|
|
|
|
|
|
EFI_HANDLE ImageHandle;
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// CPU Architectural Protocol
|
|
|
|
|
//
|
|
|
|
|
EFI_CPU_ARCH_PROTOCOL *Cpu;
|
|
|
|
|
|
2011-08-30 07:52:28 +02:00
|
|
|
//
|
|
|
|
|
// Timer Architectural Protocol
|
|
|
|
|
//
|
|
|
|
|
EFI_TIMER_ARCH_PROTOCOL *Timer;
|
|
|
|
|
BOOLEAN TimerUses8254;
|
|
|
|
|
|
2011-06-28 01:32:56 +02:00
|
|
|
//
|
|
|
|
|
// Protocol to Lock and Unlock 0xc0000 - 0xfffff
|
|
|
|
|
//
|
|
|
|
|
EFI_LEGACY_REGION2_PROTOCOL *LegacyRegion;
|
|
|
|
|
|
|
|
|
|
EFI_LEGACY_BIOS_PLATFORM_PROTOCOL *LegacyBiosPlatform;
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// Interrupt control for thunk and PCI IRQ
|
|
|
|
|
//
|
|
|
|
|
EFI_LEGACY_8259_PROTOCOL *Legacy8259;
|
2011-08-30 07:52:28 +02:00
|
|
|
|
2011-06-28 01:32:56 +02:00
|
|
|
//
|
|
|
|
|
// PCI Interrupt PIRQ control
|
|
|
|
|
//
|
|
|
|
|
EFI_LEGACY_INTERRUPT_PROTOCOL *LegacyInterrupt;
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// Generic Memory Test
|
|
|
|
|
//
|
|
|
|
|
EFI_GENERIC_MEMORY_TEST_PROTOCOL *GenericMemoryTest;
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// TRUE if PCI Interupt Line registers have been programmed.
|
|
|
|
|
//
|
|
|
|
|
BOOLEAN PciInterruptLine;
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// Code space below 1MB needed by thunker to transition to real mode.
|
|
|
|
|
// Contains stack and real mode code fragments
|
|
|
|
|
//
|
|
|
|
|
LOW_MEMORY_THUNK *IntThunk;
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// Starting shadow address of the Legacy BIOS
|
|
|
|
|
//
|
|
|
|
|
UINT32 BiosStart;
|
|
|
|
|
UINT32 LegacyBiosImageSize;
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// Start of variables used by CsmItp.mac ITP macro file and/os LegacyBios
|
|
|
|
|
//
|
|
|
|
|
UINT8 Dump[4];
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// $EFI Legacy16 code entry info in memory < 1 MB;
|
|
|
|
|
//
|
|
|
|
|
EFI_COMPATIBILITY16_TABLE *Legacy16Table;
|
|
|
|
|
VOID *Legacy16InitPtr;
|
|
|
|
|
VOID *Legacy16BootPtr;
|
|
|
|
|
VOID *InternalIrqRoutingTable;
|
|
|
|
|
UINT32 NumberIrqRoutingEntries;
|
|
|
|
|
VOID *BbsTablePtr;
|
|
|
|
|
VOID *HddTablePtr;
|
|
|
|
|
UINT32 NumberHddControllers;
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// Cached copy of Legacy16 entry point
|
|
|
|
|
//
|
|
|
|
|
UINT16 Legacy16CallSegment;
|
|
|
|
|
UINT16 Legacy16CallOffset;
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// Returned from $EFI and passed in to OPROMS
|
|
|
|
|
//
|
|
|
|
|
UINT16 PnPInstallationCheckSegment;
|
|
|
|
|
UINT16 PnPInstallationCheckOffset;
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// E820 table
|
|
|
|
|
//
|
|
|
|
|
EFI_E820_ENTRY E820Table[EFI_MAX_E820_ENTRY];
|
|
|
|
|
UINT32 NumberE820Entries;
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// True if legacy VGA INT 10h handler installed
|
|
|
|
|
//
|
|
|
|
|
BOOLEAN VgaInstalled;
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// Number of IDE drives
|
|
|
|
|
//
|
|
|
|
|
UINT8 IdeDriveCount;
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// Current Free Option ROM space. An option ROM must NOT go past
|
|
|
|
|
// BiosStart.
|
|
|
|
|
//
|
|
|
|
|
UINT32 OptionRom;
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// Save Legacy16 unexpected interrupt vector. Reprogram INT 68-6F from
|
|
|
|
|
// EFI values to legacy value just before boot.
|
|
|
|
|
//
|
|
|
|
|
UINT32 BiosUnexpectedInt;
|
|
|
|
|
UINT32 ThunkSavedInt[8];
|
|
|
|
|
UINT16 ThunkSeg;
|
|
|
|
|
LEGACY_EFI_HDD_TABLE *LegacyEfiHddTable;
|
|
|
|
|
UINT16 LegacyEfiHddTableIndex;
|
|
|
|
|
UINT8 DiskEnd;
|
|
|
|
|
UINT8 Disk4075;
|
|
|
|
|
UINT16 TraceIndex;
|
|
|
|
|
UINT16 Trace[0x200];
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// Indicate that whether GenericLegacyBoot is entered or not
|
|
|
|
|
//
|
|
|
|
|
BOOLEAN LegacyBootEntered;
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
// CSM16 PCI Interface Version
|
|
|
|
|
//
|
|
|
|
|
UINT16 Csm16PciInterfaceVersion;
|
|
|
|
|
|
|
|
|
|
} LEGACY_BIOS_INSTANCE;
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
#pragma pack(1)
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
40:00-01 Com1
|
|
|
|
|
40:02-03 Com2
|
|
|
|
|
40:04-05 Com3
|
|
|
|
|
40:06-07 Com4
|
|
|
|
|
40:08-09 Lpt1
|
|
|
|
|
40:0A-0B Lpt2
|
|
|
|
|
40:0C-0D Lpt3
|
|
|
|
|
40:0E-0E Ebda segment
|
|
|
|
|
40:10-11 MachineConfig
|
|
|
|
|
40:12 Bda12 - skip
|
|
|
|
|
40:13-14 MemSize below 1MB
|
|
|
|
|
40:15-16 Bda15_16 - skip
|
|
|
|
|
40:17 Keyboard Shift status
|
|
|
|
|
40:18-19 Bda18_19 - skip
|
|
|
|
|
40:1A-1B Key buffer head
|
|
|
|
|
40:1C-1D Key buffer tail
|
|
|
|
|
40:1E-3D Bda1E_3D- key buffer -skip
|
|
|
|
|
40:3E-3F FloppyData 3E = Calibration status 3F = Motor status
|
|
|
|
|
40:40 FloppyTimeout
|
|
|
|
|
40:41-74 Bda41_74 - skip
|
|
|
|
|
40:75 Number of HDD drives
|
|
|
|
|
40:76-77 Bda76_77 - skip
|
|
|
|
|
40:78-79 78 = Lpt1 timeout, 79 = Lpt2 timeout
|
|
|
|
|
40:7A-7B 7A = Lpt3 timeout, 7B = Lpt4 timeout
|
|
|
|
|
40:7C-7D 7C = Com1 timeout, 7D = Com2 timeout
|
|
|
|
|
40:7E-7F 7E = Com3 timeout, 7F = Com4 timeout
|
|
|
|
|
40:80-81 Pointer to start of key buffer
|
|
|
|
|
40:82-83 Pointer to end of key buffer
|
|
|
|
|
40:84-87 Bda84_87 - skip
|
|
|
|
|
40:88 HDD Data Xmit rate
|
|
|
|
|
40:89-8f skip
|
|
|
|
|
40:90 Floppy data rate
|
|
|
|
|
40:91-95 skip
|
|
|
|
|
40:96 Keyboard Status
|
|
|
|
|
40:97 LED Status
|
|
|
|
|
40:98-101 skip
|
|
|
|
|
*/
|
|
|
|
|
typedef struct {
|
|
|
|
|
UINT16 Com1;
|
|
|
|
|
UINT16 Com2;
|
|
|
|
|
UINT16 Com3;
|
|
|
|
|
UINT16 Com4;
|
|
|
|
|
UINT16 Lpt1;
|
|
|
|
|
UINT16 Lpt2;
|
|
|
|
|
UINT16 Lpt3;
|
|
|
|
|
UINT16 Ebda;
|
|
|
|
|
UINT16 MachineConfig;
|
|
|
|
|
UINT8 Bda12;
|
|
|
|
|
UINT16 MemSize;
|
|
|
|
|
UINT8 Bda15_16[0x02];
|
|
|
|
|
UINT8 ShiftStatus;
|
|
|
|
|
UINT8 Bda18_19[0x02];
|
|
|
|
|
UINT16 KeyHead;
|
|
|
|
|
UINT16 KeyTail;
|
|
|
|
|
UINT16 Bda1E_3D[0x10];
|
|
|
|
|
UINT16 FloppyData;
|
|
|
|
|
UINT8 FloppyTimeout;
|
|
|
|
|
UINT8 Bda41_74[0x34];
|
|
|
|
|
UINT8 NumberOfDrives;
|
|
|
|
|
UINT8 Bda76_77[0x02];
|
|
|
|
|
UINT16 Lpt1_2Timeout;
|
|
|
|
|
UINT16 Lpt3_4Timeout;
|
|
|
|
|
UINT16 Com1_2Timeout;
|
|
|
|
|
UINT16 Com3_4Timeout;
|
|
|
|
|
UINT16 KeyStart;
|
|
|
|
|
UINT16 KeyEnd;
|
|
|
|
|
UINT8 Bda84_87[0x4];
|
|
|
|
|
UINT8 DataXmit;
|
|
|
|
|
UINT8 Bda89_8F[0x07];
|
|
|
|
|
UINT8 FloppyXRate;
|
|
|
|
|
UINT8 Bda91_95[0x05];
|
|
|
|
|
UINT8 KeyboardStatus;
|
|
|
|
|
UINT8 LedStatus;
|
|
|
|
|
} BDA_STRUC;
|
|
|
|
|
#pragma pack()
|
|
|
|
|
|
|
|
|
|
#define LEGACY_BIOS_INSTANCE_FROM_THIS(this) CR (this, LEGACY_BIOS_INSTANCE, LegacyBios, LEGACY_BIOS_INSTANCE_SIGNATURE)
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Thunk to 16-bit real mode and execute a software interrupt with a vector
|
|
|
|
|
of BiosInt. Regs will contain the 16-bit register context on entry and
|
|
|
|
|
exit.
|
|
|
|
|
|
|
|
|
|
@param This Protocol instance pointer.
|
|
|
|
|
@param BiosInt Processor interrupt vector to invoke
|
|
|
|
|
@param Regs Register contexted passed into (and returned) from thunk to
|
|
|
|
|
16-bit mode
|
|
|
|
|
|
|
|
|
|
@retval FALSE Thunk completed, and there were no BIOS errors in the target code.
|
|
|
|
|
See Regs for status.
|
|
|
|
|
@retval TRUE There was a BIOS erro in the target code.
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
BOOLEAN
|
|
|
|
|
EFIAPI
|
|
|
|
|
LegacyBiosInt86 (
|
|
|
|
|
IN EFI_LEGACY_BIOS_PROTOCOL *This,
|
|
|
|
|
IN UINT8 BiosInt,
|
|
|
|
|
IN EFI_IA32_REGISTER_SET *Regs
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Thunk to 16-bit real mode and call Segment:Offset. Regs will contain the
|
|
|
|
|
16-bit register context on entry and exit. Arguments can be passed on
|
|
|
|
|
the Stack argument
|
|
|
|
|
|
|
|
|
|
@param This Protocol instance pointer.
|
|
|
|
|
@param Segment Segemnt of 16-bit mode call
|
|
|
|
|
@param Offset Offset of 16-bit mdoe call
|
|
|
|
|
@param Regs Register contexted passed into (and returned) from
|
|
|
|
|
thunk to 16-bit mode
|
|
|
|
|
@param Stack Caller allocated stack used to pass arguments
|
|
|
|
|
@param StackSize Size of Stack in bytes
|
|
|
|
|
|
|
|
|
|
@retval FALSE Thunk completed, and there were no BIOS errors in
|
|
|
|
|
the target code. See Regs for status.
|
|
|
|
|
@retval TRUE There was a BIOS erro in the target code.
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
BOOLEAN
|
|
|
|
|
EFIAPI
|
|
|
|
|
LegacyBiosFarCall86 (
|
|
|
|
|
IN EFI_LEGACY_BIOS_PROTOCOL *This,
|
|
|
|
|
IN UINT16 Segment,
|
|
|
|
|
IN UINT16 Offset,
|
|
|
|
|
IN EFI_IA32_REGISTER_SET *Regs,
|
|
|
|
|
IN VOID *Stack,
|
|
|
|
|
IN UINTN StackSize
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Test to see if a legacy PCI ROM exists for this device. Optionally return
|
|
|
|
|
the Legacy ROM instance for this PCI device.
|
|
|
|
|
|
|
|
|
|
@param This Protocol instance pointer.
|
|
|
|
|
@param PciHandle The PCI PC-AT OPROM from this devices ROM BAR will
|
|
|
|
|
be loaded
|
|
|
|
|
@param RomImage Return the legacy PCI ROM for this device
|
|
|
|
|
@param RomSize Size of ROM Image
|
|
|
|
|
@param Flags Indicates if ROM found and if PC-AT.
|
|
|
|
|
|
|
|
|
|
@retval EFI_SUCCESS Legacy Option ROM availible for this device
|
|
|
|
|
@retval EFI_UNSUPPORTED Legacy Option ROM not supported.
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
EFI_STATUS
|
|
|
|
|
EFIAPI
|
|
|
|
|
LegacyBiosCheckPciRom (
|
|
|
|
|
IN EFI_LEGACY_BIOS_PROTOCOL *This,
|
|
|
|
|
IN EFI_HANDLE PciHandle,
|
|
|
|
|
OUT VOID **RomImage, OPTIONAL
|
|
|
|
|
OUT UINTN *RomSize, OPTIONAL
|
|
|
|
|
OUT UINTN *Flags
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Assign drive number to legacy HDD drives prior to booting an EFI
|
|
|
|
|
aware OS so the OS can access drives without an EFI driver.
|
|
|
|
|
Note: BBS compliant drives ARE NOT available until this call by
|
|
|
|
|
either shell or EFI.
|
|
|
|
|
|
|
|
|
|
@param This Protocol instance pointer.
|
|
|
|
|
@param BbsCount Number of BBS_TABLE structures
|
|
|
|
|
@param BbsTable List BBS entries
|
|
|
|
|
|
|
|
|
|
@retval EFI_SUCCESS Drive numbers assigned
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
EFI_STATUS
|
|
|
|
|
EFIAPI
|
|
|
|
|
LegacyBiosPrepareToBootEfi (
|
|
|
|
|
IN EFI_LEGACY_BIOS_PROTOCOL *This,
|
|
|
|
|
OUT UINT16 *BbsCount,
|
|
|
|
|
OUT BBS_TABLE **BbsTable
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
To boot from an unconventional device like parties and/or execute
|
|
|
|
|
HDD diagnostics.
|
|
|
|
|
|
|
|
|
|
@param This Protocol instance pointer.
|
|
|
|
|
@param Attributes How to interpret the other input parameters
|
|
|
|
|
@param BbsEntry The 0-based index into the BbsTable for the parent
|
|
|
|
|
device.
|
|
|
|
|
@param BeerData Pointer to the 128 bytes of ram BEER data.
|
|
|
|
|
@param ServiceAreaData Pointer to the 64 bytes of raw Service Area data.
|
|
|
|
|
The caller must provide a pointer to the specific
|
|
|
|
|
Service Area and not the start all Service Areas.
|
|
|
|
|
EFI_INVALID_PARAMETER if error. Does NOT return if no error.
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
EFI_STATUS
|
|
|
|
|
EFIAPI
|
|
|
|
|
LegacyBiosBootUnconventionalDevice (
|
|
|
|
|
IN EFI_LEGACY_BIOS_PROTOCOL *This,
|
|
|
|
|
IN UDC_ATTRIBUTES Attributes,
|
|
|
|
|
IN UINTN BbsEntry,
|
|
|
|
|
IN VOID *BeerData,
|
|
|
|
|
IN VOID *ServiceAreaData
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Load a legacy PC-AT OPROM on the PciHandle device. Return information
|
|
|
|
|
about how many disks were added by the OPROM and the shadow address and
|
|
|
|
|
size. DiskStart & DiskEnd are INT 13h drive letters. Thus 0x80 is C:
|
|
|
|
|
|
|
|
|
|
@param This Protocol instance pointer.
|
|
|
|
|
@param PciHandle The PCI PC-AT OPROM from this devices ROM BAR will
|
|
|
|
|
be loaded. This value is NULL if RomImage is
|
|
|
|
|
non-NULL. This is the normal case.
|
|
|
|
|
@param RomImage A PCI PC-AT ROM image. This argument is non-NULL
|
|
|
|
|
if there is no hardware associated with the ROM
|
|
|
|
|
and thus no PciHandle, otherwise is must be NULL.
|
|
|
|
|
Example is PXE base code.
|
|
|
|
|
@param Flags Indicates if ROM found and if PC-AT.
|
|
|
|
|
@param DiskStart Disk number of first device hooked by the ROM. If
|
|
|
|
|
DiskStart is the same as DiskEnd no disked were
|
|
|
|
|
hooked.
|
|
|
|
|
@param DiskEnd Disk number of the last device hooked by the ROM.
|
|
|
|
|
@param RomShadowAddress Shadow address of PC-AT ROM
|
|
|
|
|
@param RomShadowedSize Size of RomShadowAddress in bytes
|
|
|
|
|
|
|
|
|
|
@retval EFI_SUCCESS Legacy ROM loaded for this device
|
|
|
|
|
@retval EFI_INVALID_PARAMETER PciHandle not found
|
|
|
|
|
@retval EFI_UNSUPPORTED There is no PCI ROM in the ROM BAR or no onboard
|
|
|
|
|
ROM
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
EFI_STATUS
|
|
|
|
|
EFIAPI
|
|
|
|
|
LegacyBiosInstallPciRom (
|
|
|
|
|
IN EFI_LEGACY_BIOS_PROTOCOL * This,
|
|
|
|
|
IN EFI_HANDLE PciHandle,
|
|
|
|
|
IN VOID **RomImage,
|
|
|
|
|
OUT UINTN *Flags,
|
|
|
|
|
OUT UINT8 *DiskStart, OPTIONAL
|
|
|
|
|
OUT UINT8 *DiskEnd, OPTIONAL
|
|
|
|
|
OUT VOID **RomShadowAddress, OPTIONAL
|
|
|
|
|
OUT UINT32 *RomShadowedSize OPTIONAL
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Fill in the standard BDA for Keyboard LEDs
|
|
|
|
|
|
|
|
|
|
@param This Protocol instance pointer.
|
|
|
|
|
@param Leds Current LED status
|
|
|
|
|
|
|
|
|
|
@retval EFI_SUCCESS It should always work.
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
EFI_STATUS
|
|
|
|
|
EFIAPI
|
|
|
|
|
LegacyBiosUpdateKeyboardLedStatus (
|
|
|
|
|
IN EFI_LEGACY_BIOS_PROTOCOL *This,
|
|
|
|
|
IN UINT8 Leds
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
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
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Shadow all legacy16 OPROMs that haven't been shadowed.
|
|
|
|
|
Warning: Use this with caution. This routine disconnects all EFI
|
|
|
|
|
drivers. If used externally then caller must re-connect EFI
|
|
|
|
|
drivers.
|
|
|
|
|
|
|
|
|
|
@param This Protocol instance pointer.
|
|
|
|
|
|
|
|
|
|
@retval EFI_SUCCESS OPROMs shadowed
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
EFI_STATUS
|
|
|
|
|
EFIAPI
|
|
|
|
|
LegacyBiosShadowAllLegacyOproms (
|
|
|
|
|
IN EFI_LEGACY_BIOS_PROTOCOL *This
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Attempt to legacy boot the BootOption. If the EFI contexted has been
|
|
|
|
|
compromised this function will not return.
|
|
|
|
|
|
|
|
|
|
@param This Protocol instance pointer.
|
|
|
|
|
@param BbsDevicePath EFI Device Path from BootXXXX variable.
|
|
|
|
|
@param LoadOptionsSize Size of LoadOption in size.
|
|
|
|
|
@param LoadOptions LoadOption from BootXXXX variable
|
|
|
|
|
|
|
|
|
|
@retval EFI_SUCCESS Removable media not present
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
EFI_STATUS
|
|
|
|
|
EFIAPI
|
|
|
|
|
LegacyBiosLegacyBoot (
|
|
|
|
|
IN EFI_LEGACY_BIOS_PROTOCOL *This,
|
|
|
|
|
IN BBS_BBS_DEVICE_PATH *BbsDevicePath,
|
|
|
|
|
IN UINT32 LoadOptionsSize,
|
|
|
|
|
IN VOID *LoadOptions
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Allocate memory < 1 MB and copy the thunker code into low memory. Se up
|
|
|
|
|
all the descriptors.
|
|
|
|
|
|
|
|
|
|
@param Private Private context for Legacy BIOS
|
|
|
|
|
|
|
|
|
|
@retval EFI_SUCCESS Should only pass.
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
EFI_STATUS
|
|
|
|
|
LegacyBiosInitializeThunk (
|
|
|
|
|
IN LEGACY_BIOS_INSTANCE *Private
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Fill in the standard BDA and EBDA stuff before Legacy16 load
|
|
|
|
|
|
|
|
|
|
@param Private Legacy BIOS Instance data
|
|
|
|
|
|
|
|
|
|
@retval EFI_SUCCESS It should always work.
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
EFI_STATUS
|
|
|
|
|
LegacyBiosInitBda (
|
|
|
|
|
IN LEGACY_BIOS_INSTANCE *Private
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Collect IDE Inquiry data from the IDE disks
|
|
|
|
|
|
|
|
|
|
@param Private Legacy BIOS Instance data
|
|
|
|
|
@param HddInfo Hdd Information
|
|
|
|
|
@param Flag Reconnect IdeController or not
|
|
|
|
|
|
|
|
|
|
@retval EFI_SUCCESS It should always work.
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
EFI_STATUS
|
|
|
|
|
LegacyBiosBuildIdeData (
|
|
|
|
|
IN LEGACY_BIOS_INSTANCE *Private,
|
|
|
|
|
IN HDD_INFO **HddInfo,
|
|
|
|
|
IN UINT16 Flag
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Enable ide controller. This gets disabled when LegacyBoot.c is about
|
|
|
|
|
to run the Option ROMs.
|
|
|
|
|
|
|
|
|
|
@param Private Legacy BIOS Instance data
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
VOID
|
|
|
|
|
EnableIdeController (
|
|
|
|
|
IN LEGACY_BIOS_INSTANCE *Private
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
If the IDE channel is in compatibility (legacy) mode, remove all
|
|
|
|
|
PCI I/O BAR addresses from the controller.
|
|
|
|
|
|
|
|
|
|
@param IdeController The handle of target IDE controller
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
VOID
|
|
|
|
|
InitLegacyIdeController (
|
|
|
|
|
IN EFI_HANDLE IdeController
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Program the interrupt routing register in all the PCI devices. On a PC AT system
|
|
|
|
|
this register contains the 8259 IRQ vector that matches it's PCI interrupt.
|
|
|
|
|
|
|
|
|
|
@param Private Legacy BIOS Instance data
|
|
|
|
|
|
|
|
|
|
@retval EFI_SUCCESS Succeed.
|
|
|
|
|
@retval EFI_ALREADY_STARTED All PCI devices have been processed.
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
EFI_STATUS
|
|
|
|
|
PciProgramAllInterruptLineRegisters (
|
|
|
|
|
IN LEGACY_BIOS_INSTANCE *Private
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Collect EFI Info about legacy devices.
|
|
|
|
|
|
|
|
|
|
@param Private Legacy BIOS Instance data
|
|
|
|
|
|
|
|
|
|
@retval EFI_SUCCESS It should always work.
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
EFI_STATUS
|
|
|
|
|
LegacyBiosBuildSioData (
|
|
|
|
|
IN LEGACY_BIOS_INSTANCE *Private
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Shadow all the PCI legacy ROMs. Use data from the Legacy BIOS Protocol
|
|
|
|
|
to chose the order. Skip any devices that have already have legacy
|
|
|
|
|
BIOS run.
|
|
|
|
|
|
|
|
|
|
@param Private Protocol instance pointer.
|
|
|
|
|
|
|
|
|
|
@retval EFI_SUCCESS Succeed.
|
|
|
|
|
@retval EFI_UNSUPPORTED Cannot get VGA device handle.
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
EFI_STATUS
|
|
|
|
|
PciShadowRoms (
|
|
|
|
|
IN LEGACY_BIOS_INSTANCE *Private
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Fill in the standard BDA and EBDA stuff prior to legacy Boot
|
|
|
|
|
|
|
|
|
|
@param Private Legacy BIOS Instance data
|
|
|
|
|
|
|
|
|
|
@retval EFI_SUCCESS It should always work.
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
EFI_STATUS
|
|
|
|
|
LegacyBiosCompleteBdaBeforeBoot (
|
|
|
|
|
IN LEGACY_BIOS_INSTANCE *Private
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Fill in the standard CMOS stuff before Legacy16 load
|
|
|
|
|
|
|
|
|
|
@param Private Legacy BIOS Instance data
|
|
|
|
|
|
|
|
|
|
@retval EFI_SUCCESS It should always work.
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
EFI_STATUS
|
|
|
|
|
LegacyBiosInitCmos (
|
|
|
|
|
IN LEGACY_BIOS_INSTANCE *Private
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Fill in the standard CMOS stuff prior to legacy Boot
|
|
|
|
|
|
|
|
|
|
@param Private Legacy BIOS Instance data
|
|
|
|
|
|
|
|
|
|
@retval EFI_SUCCESS It should always work.
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
EFI_STATUS
|
|
|
|
|
LegacyBiosCompleteStandardCmosBeforeBoot (
|
|
|
|
|
IN LEGACY_BIOS_INSTANCE *Private
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Contains the code that is copied into low memory (below 640K).
|
|
|
|
|
This code reflects interrupts 0x68-0x6f to interrupts 0x08-0x0f.
|
|
|
|
|
This template must be copied into low memory, and the IDT entries
|
|
|
|
|
0x68-0x6F must be point to the low memory copy of this code. Each
|
|
|
|
|
entry is 4 bytes long, so IDT entries 0x68-0x6F can be easily
|
|
|
|
|
computed.
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
VOID
|
|
|
|
|
InterruptRedirectionTemplate (
|
|
|
|
|
VOID
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Build the E820 table.
|
|
|
|
|
|
|
|
|
|
@param Private Legacy BIOS Instance data
|
|
|
|
|
@param Size Size of E820 Table
|
|
|
|
|
|
|
|
|
|
@retval EFI_SUCCESS It should always work.
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
EFI_STATUS
|
|
|
|
|
LegacyBiosBuildE820 (
|
|
|
|
|
IN LEGACY_BIOS_INSTANCE *Private,
|
|
|
|
|
OUT UINTN *Size
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
This function is to put all AP in halt state.
|
|
|
|
|
|
|
|
|
|
@param Private Legacy BIOS Instance data
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
VOID
|
|
|
|
|
ShutdownAPs (
|
|
|
|
|
IN LEGACY_BIOS_INSTANCE *Private
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Worker function for LegacyBiosGetFlatDescs, retrieving content of
|
|
|
|
|
specific registers.
|
|
|
|
|
|
|
|
|
|
@param IntThunk Pointer to IntThunk of Legacy BIOS context.
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
VOID
|
|
|
|
|
GetRegisters (
|
|
|
|
|
LOW_MEMORY_THUNK *IntThunk
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Routine for calling real thunk code.
|
|
|
|
|
|
|
|
|
|
@param RealCode The address of thunk code.
|
|
|
|
|
@param BiosInt The Bios interrupt vector number.
|
|
|
|
|
@param CallAddress The address of 16-bit mode call.
|
|
|
|
|
|
|
|
|
|
@return Status returned by real thunk code
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
UINTN
|
|
|
|
|
CallRealThunkCode (
|
|
|
|
|
UINT8 *RealCode,
|
|
|
|
|
UINT8 BiosInt,
|
|
|
|
|
UINT32 CallAddress
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Routine for generating soft interrupt.
|
|
|
|
|
|
|
|
|
|
@param Vector The interrupt vector number.
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
VOID
|
|
|
|
|
GenerateSoftInit (
|
|
|
|
|
UINT8 Vector
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Do an AllocatePages () of type AllocateMaxAddress for EfiBootServicesCode
|
|
|
|
|
memory.
|
|
|
|
|
|
|
|
|
|
@param AllocateType Allocated Legacy Memory Type
|
|
|
|
|
@param StartPageAddress Start address of range
|
|
|
|
|
@param Pages Number of pages to allocate
|
|
|
|
|
@param Result Result of allocation
|
|
|
|
|
|
|
|
|
|
@retval EFI_SUCCESS Legacy16 code loaded
|
|
|
|
|
@retval Other No protocol installed, unload driver.
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
EFI_STATUS
|
|
|
|
|
AllocateLegacyMemory (
|
|
|
|
|
IN EFI_ALLOCATE_TYPE AllocateType,
|
|
|
|
|
IN EFI_PHYSICAL_ADDRESS StartPageAddress,
|
|
|
|
|
IN UINTN Pages,
|
|
|
|
|
OUT EFI_PHYSICAL_ADDRESS *Result
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Get a region from the LegacyBios for Tiano usage. Can only be invoked once.
|
|
|
|
|
|
|
|
|
|
@param This Protocol instance pointer.
|
|
|
|
|
@param LegacyMemorySize Size of required region
|
|
|
|
|
@param Region Region to use. 00 = Either 0xE0000 or 0xF0000
|
|
|
|
|
block Bit0 = 1 0xF0000 block Bit1 = 1 0xE0000
|
|
|
|
|
block
|
|
|
|
|
@param Alignment Address alignment. Bit mapped. First non-zero
|
|
|
|
|
bit from right is alignment.
|
|
|
|
|
@param LegacyMemoryAddress Region Assigned
|
|
|
|
|
|
|
|
|
|
@retval EFI_SUCCESS Region assigned
|
|
|
|
|
@retval EFI_ACCESS_DENIED Procedure previously invoked
|
|
|
|
|
@retval Other Region not assigned
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
EFI_STATUS
|
|
|
|
|
EFIAPI
|
|
|
|
|
LegacyBiosGetLegacyRegion (
|
|
|
|
|
IN EFI_LEGACY_BIOS_PROTOCOL *This,
|
|
|
|
|
IN UINTN LegacyMemorySize,
|
|
|
|
|
IN UINTN Region,
|
|
|
|
|
IN UINTN Alignment,
|
|
|
|
|
OUT VOID **LegacyMemoryAddress
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Get a region from the LegacyBios for Tiano usage. Can only be invoked once.
|
|
|
|
|
|
|
|
|
|
@param This Protocol instance pointer.
|
|
|
|
|
@param LegacyMemorySize Size of data to copy
|
|
|
|
|
@param LegacyMemoryAddress Legacy Region destination address Note: must
|
|
|
|
|
be in region assigned by
|
|
|
|
|
LegacyBiosGetLegacyRegion
|
|
|
|
|
@param LegacyMemorySourceAddress Source of data
|
|
|
|
|
|
|
|
|
|
@retval EFI_SUCCESS Region assigned
|
|
|
|
|
@retval EFI_ACCESS_DENIED Destination outside assigned region
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
EFI_STATUS
|
|
|
|
|
EFIAPI
|
|
|
|
|
LegacyBiosCopyLegacyRegion (
|
|
|
|
|
IN EFI_LEGACY_BIOS_PROTOCOL *This,
|
|
|
|
|
IN UINTN LegacyMemorySize,
|
|
|
|
|
IN VOID *LegacyMemoryAddress,
|
|
|
|
|
IN VOID *LegacyMemorySourceAddress
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Find Legacy16 BIOS image in the FLASH device and shadow it into memory. Find
|
|
|
|
|
the $EFI table in the shadow area. Thunk into the Legacy16 code after it had
|
|
|
|
|
been shadowed.
|
|
|
|
|
|
|
|
|
|
@param Private Legacy BIOS context data
|
|
|
|
|
|
|
|
|
|
@retval EFI_SUCCESS Legacy16 code loaded
|
|
|
|
|
@retval Other No protocol installed, unload driver.
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
EFI_STATUS
|
|
|
|
|
ShadowAndStartLegacy16 (
|
|
|
|
|
IN LEGACY_BIOS_INSTANCE *Private
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
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
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Identify drive data must be updated to actual parameters before boot.
|
|
|
|
|
This requires updating the checksum, if it exists.
|
|
|
|
|
|
|
|
|
|
@param IdentifyDriveData ATA Identify Data
|
|
|
|
|
@param Checksum checksum of the ATA Identify Data
|
|
|
|
|
|
|
|
|
|
@retval EFI_SUCCESS checksum calculated
|
|
|
|
|
@retval EFI_SECURITY_VIOLATION IdentifyData invalid
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
EFI_STATUS
|
|
|
|
|
CalculateIdentifyDriveChecksum (
|
|
|
|
|
IN UINT8 *IdentifyDriveData,
|
|
|
|
|
OUT UINT8 *Checksum
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Identify drive data must be updated to actual parameters before boot.
|
|
|
|
|
|
|
|
|
|
@param IdentifyDriveData ATA Identify Data
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
VOID
|
|
|
|
|
UpdateIdentifyDriveData (
|
|
|
|
|
IN UINT8 *IdentifyDriveData
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
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
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Read CMOS register through index/data port.
|
|
|
|
|
|
|
|
|
|
@param[in] Index The index of the CMOS register to read.
|
|
|
|
|
|
|
|
|
|
@return The data value from the CMOS register specified by Index.
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
UINT8
|
|
|
|
|
LegacyReadStandardCmos (
|
|
|
|
|
IN UINT8 Index
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Write CMOS register through index/data port.
|
|
|
|
|
|
|
|
|
|
@param[in] Index The index of the CMOS register to write.
|
|
|
|
|
@param[in] Value The value of CMOS register to write.
|
|
|
|
|
|
|
|
|
|
@return The value written to the CMOS register specified by Index.
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
UINT8
|
|
|
|
|
LegacyWriteStandardCmos (
|
|
|
|
|
IN UINT8 Index,
|
|
|
|
|
IN UINT8 Value
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Calculate the new standard CMOS checksum and write it.
|
|
|
|
|
|
|
|
|
|
@param Private Legacy BIOS Instance data
|
|
|
|
|
|
|
|
|
|
@retval EFI_SUCCESS Calculate 16-bit checksum successfully
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
EFI_STATUS
|
|
|
|
|
LegacyCalculateWriteStandardCmosChecksum (
|
|
|
|
|
VOID
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Test to see if a legacy PCI ROM exists for this device. Optionally return
|
|
|
|
|
the Legacy ROM instance for this PCI device.
|
|
|
|
|
|
|
|
|
|
@param[in] This Protocol instance pointer.
|
|
|
|
|
@param[in] PciHandle The PCI PC-AT OPROM from this devices ROM BAR will be loaded
|
|
|
|
|
@param[out] RomImage Return the legacy PCI ROM for this device
|
|
|
|
|
@param[out] RomSize Size of ROM Image
|
|
|
|
|
@param[out] RuntimeImageLength Runtime size of ROM Image
|
|
|
|
|
@param[out] Flags Indicates if ROM found and if PC-AT.
|
|
|
|
|
@param[out] OpromRevision Revision of the PCI Rom
|
|
|
|
|
@param[out] ConfigUtilityCodeHeaderPointer of Configuration Utility Code Header
|
|
|
|
|
|
|
|
|
|
@return EFI_SUCCESS Legacy Option ROM availible for this device
|
|
|
|
|
@return EFI_ALREADY_STARTED This device is already managed by its Oprom
|
|
|
|
|
@return EFI_UNSUPPORTED Legacy Option ROM not supported.
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
EFI_STATUS
|
|
|
|
|
LegacyBiosCheckPciRomEx (
|
|
|
|
|
IN EFI_LEGACY_BIOS_PROTOCOL *This,
|
|
|
|
|
IN EFI_HANDLE PciHandle,
|
|
|
|
|
OUT VOID **RomImage, OPTIONAL
|
|
|
|
|
OUT UINTN *RomSize, OPTIONAL
|
|
|
|
|
OUT UINTN *RuntimeImageLength, OPTIONAL
|
|
|
|
|
OUT UINTN *Flags, OPTIONAL
|
|
|
|
|
OUT UINT8 *OpromRevision, OPTIONAL
|
|
|
|
|
OUT VOID **ConfigUtilityCodeHeader OPTIONAL
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Relocate this image under 4G memory for IPF.
|
|
|
|
|
|
|
|
|
|
@param ImageHandle Handle of driver image.
|
|
|
|
|
@param SystemTable Pointer to system table.
|
|
|
|
|
|
|
|
|
|
@retval EFI_SUCCESS Image successfully relocated.
|
|
|
|
|
@retval EFI_ABORTED Failed to relocate image.
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
EFI_STATUS
|
|
|
|
|
RelocateImageUnder4GIfNeeded (
|
|
|
|
|
IN EFI_HANDLE ImageHandle,
|
|
|
|
|
IN EFI_SYSTEM_TABLE *SystemTable
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
Thunk to 16-bit real mode and call Segment:Offset. Regs will contain the
|
|
|
|
|
16-bit register context on entry and exit. Arguments can be passed on
|
|
|
|
|
the Stack argument
|
|
|
|
|
|
|
|
|
|
@param This Protocol instance pointer.
|
|
|
|
|
@param Segment Segemnt of 16-bit mode call
|
|
|
|
|
@param Offset Offset of 16-bit mdoe call
|
|
|
|
|
@param Regs Register contexted passed into (and returned) from thunk to
|
|
|
|
|
16-bit mode
|
|
|
|
|
@param Stack Caller allocated stack used to pass arguments
|
|
|
|
|
@param StackSize Size of Stack in bytes
|
|
|
|
|
|
|
|
|
|
@retval FALSE Thunk completed, and there were no BIOS errors in the target code.
|
|
|
|
|
See Regs for status.
|
|
|
|
|
@retval TRUE There was a BIOS erro in the target code.
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
BOOLEAN
|
|
|
|
|
EFIAPI
|
|
|
|
|
InternalLegacyBiosFarCall (
|
|
|
|
|
IN EFI_LEGACY_BIOS_PROTOCOL *This,
|
|
|
|
|
IN UINT16 Segment,
|
|
|
|
|
IN UINT16 Offset,
|
|
|
|
|
IN EFI_IA32_REGISTER_SET *Regs,
|
|
|
|
|
IN VOID *Stack,
|
|
|
|
|
IN UINTN StackSize
|
|
|
|
|
);
|
|
|
|
|
|
2013-03-15 02:34:21 +01:00
|
|
|
/**
|
|
|
|
|
Load a legacy PC-AT OpROM for VGA controller.
|
|
|
|
|
|
|
|
|
|
@param Private Driver private data.
|
|
|
|
|
|
|
|
|
|
@retval EFI_SUCCESS Legacy ROM successfully installed for this device.
|
|
|
|
|
@retval EFI_DEVICE_ERROR No VGA device handle found, or native EFI video
|
|
|
|
|
driver cannot be successfully disconnected, or VGA
|
|
|
|
|
thunk driver cannot be successfully connected.
|
|
|
|
|
|
|
|
|
|
**/
|
|
|
|
|
EFI_STATUS
|
|
|
|
|
LegacyBiosInstallVgaRom (
|
|
|
|
|
IN LEGACY_BIOS_INSTANCE *Private
|
|
|
|
|
);
|
|
|
|
|
|
2011-06-28 01:32:56 +02:00
|
|
|
#endif
|
