79966a6f35
Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Elvin Li <elvin.li@intel.com> Reviewed-by: Jeff Fan <jeff.fan@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15789 6f19259b-4bc3-4df7-8a09-765794883524
1155 lines
39 KiB
C
1155 lines
39 KiB
C
/** @file
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Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>
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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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#include "LegacyBiosInterface.h"
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#define PHYSICAL_ADDRESS_TO_POINTER(Address) ((VOID *) ((UINTN) Address))
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//
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// define maximum number of HDD system supports
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//
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#define MAX_HDD_ENTRIES 0x30
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//
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// Module Global:
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// Since this driver will only ever produce one instance of the Private Data
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// protocol you are not required to dynamically allocate the PrivateData.
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//
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LEGACY_BIOS_INSTANCE mPrivateData;
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//
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// The SMBIOS table in EfiRuntimeServicesData memory
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//
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VOID *mRuntimeSmbiosEntryPoint = NULL;
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//
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// The SMBIOS table in EfiReservedMemoryType memory
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//
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EFI_PHYSICAL_ADDRESS mReserveSmbiosEntryPoint = 0;
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EFI_PHYSICAL_ADDRESS mStructureTableAddress = 0;
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UINTN mStructureTablePages = 0;
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/**
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Do an AllocatePages () of type AllocateMaxAddress for EfiBootServicesCode
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memory.
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@param AllocateType Allocated Legacy Memory Type
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@param StartPageAddress Start address of range
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@param Pages Number of pages to allocate
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@param Result Result of allocation
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@retval EFI_SUCCESS Legacy16 code loaded
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@retval Other No protocol installed, unload driver.
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**/
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EFI_STATUS
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AllocateLegacyMemory (
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IN EFI_ALLOCATE_TYPE AllocateType,
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IN EFI_PHYSICAL_ADDRESS StartPageAddress,
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IN UINTN Pages,
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OUT EFI_PHYSICAL_ADDRESS *Result
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)
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{
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EFI_STATUS Status;
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EFI_PHYSICAL_ADDRESS MemPage;
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//
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// Allocate Pages of memory less <= StartPageAddress
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//
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MemPage = (EFI_PHYSICAL_ADDRESS) (UINTN) StartPageAddress;
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Status = gBS->AllocatePages (
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AllocateType,
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EfiBootServicesCode,
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Pages,
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&MemPage
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);
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//
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// Do not ASSERT on Status error but let caller decide since some cases
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// memory is already taken but that is ok.
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//
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if (!EFI_ERROR (Status)) {
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*Result = (EFI_PHYSICAL_ADDRESS) (UINTN) MemPage;
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}
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//
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// If reach here the status = EFI_SUCCESS
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//
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return Status;
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}
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/**
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This function is called when EFI needs to reserve an area in the 0xE0000 or 0xF0000
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64 KB blocks.
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Note: inconsistency with the Framework CSM spec. Per the spec, this function may be
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invoked only once. This limitation is relaxed to allow multiple calls in this implemenation.
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@param This Protocol instance pointer.
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@param LegacyMemorySize Size of required region
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@param Region Region to use. 00 = Either 0xE0000 or 0xF0000
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block Bit0 = 1 0xF0000 block Bit1 = 1 0xE0000
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block
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@param Alignment Address alignment. Bit mapped. First non-zero
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bit from right is alignment.
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@param LegacyMemoryAddress Region Assigned
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@retval EFI_SUCCESS Region assigned
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@retval EFI_ACCESS_DENIED Procedure previously invoked
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@retval Other Region not assigned
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**/
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EFI_STATUS
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EFIAPI
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LegacyBiosGetLegacyRegion (
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IN EFI_LEGACY_BIOS_PROTOCOL *This,
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IN UINTN LegacyMemorySize,
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IN UINTN Region,
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IN UINTN Alignment,
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OUT VOID **LegacyMemoryAddress
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)
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{
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LEGACY_BIOS_INSTANCE *Private;
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EFI_IA32_REGISTER_SET Regs;
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EFI_STATUS Status;
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UINT32 Granularity;
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Private = LEGACY_BIOS_INSTANCE_FROM_THIS (This);
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Private->LegacyRegion->UnLock (Private->LegacyRegion, 0xE0000, 0x20000, &Granularity);
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ZeroMem (&Regs, sizeof (EFI_IA32_REGISTER_SET));
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Regs.X.AX = Legacy16GetTableAddress;
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Regs.X.BX = (UINT16) Region;
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Regs.X.CX = (UINT16) LegacyMemorySize;
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Regs.X.DX = (UINT16) Alignment;
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Private->LegacyBios.FarCall86 (
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&Private->LegacyBios,
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Private->Legacy16CallSegment,
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Private->Legacy16CallOffset,
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&Regs,
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NULL,
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0
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);
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if (Regs.X.AX == 0) {
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*LegacyMemoryAddress = (VOID *) (UINTN) ((Regs.X.DS << 4) + Regs.X.BX);
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Status = EFI_SUCCESS;
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} else {
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Status = EFI_OUT_OF_RESOURCES;
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}
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Private->Cpu->FlushDataCache (Private->Cpu, 0xE0000, 0x20000, EfiCpuFlushTypeWriteBackInvalidate);
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Private->LegacyRegion->Lock (Private->LegacyRegion, 0xE0000, 0x20000, &Granularity);
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return Status;
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}
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/**
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This function is called when copying data to the region assigned by
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EFI_LEGACY_BIOS_PROTOCOL.GetLegacyRegion().
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@param This Protocol instance pointer.
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@param LegacyMemorySize Size of data to copy
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@param LegacyMemoryAddress Legacy Region destination address Note: must
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be in region assigned by
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LegacyBiosGetLegacyRegion
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@param LegacyMemorySourceAddress Source of data
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@retval EFI_SUCCESS The data was copied successfully.
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@retval EFI_ACCESS_DENIED Either the starting or ending address is out of bounds.
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**/
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EFI_STATUS
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EFIAPI
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LegacyBiosCopyLegacyRegion (
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IN EFI_LEGACY_BIOS_PROTOCOL *This,
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IN UINTN LegacyMemorySize,
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IN VOID *LegacyMemoryAddress,
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IN VOID *LegacyMemorySourceAddress
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)
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{
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LEGACY_BIOS_INSTANCE *Private;
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UINT32 Granularity;
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if ((LegacyMemoryAddress < (VOID *)(UINTN)0xE0000 ) ||
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((UINTN) LegacyMemoryAddress + LegacyMemorySize > (UINTN) 0x100000)
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) {
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return EFI_ACCESS_DENIED;
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}
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//
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// There is no protection from writes over lapping if this function is
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// called multiple times.
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//
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Private = LEGACY_BIOS_INSTANCE_FROM_THIS (This);
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Private->LegacyRegion->UnLock (Private->LegacyRegion, 0xE0000, 0x20000, &Granularity);
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CopyMem (LegacyMemoryAddress, LegacyMemorySourceAddress, LegacyMemorySize);
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Private->Cpu->FlushDataCache (Private->Cpu, 0xE0000, 0x20000, EfiCpuFlushTypeWriteBackInvalidate);
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Private->LegacyRegion->Lock (Private->LegacyRegion, 0xE0000, 0x20000, &Granularity);
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return EFI_SUCCESS;
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}
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/**
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Find Legacy16 BIOS image in the FLASH device and shadow it into memory. Find
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the $EFI table in the shadow area. Thunk into the Legacy16 code after it had
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been shadowed.
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@param Private Legacy BIOS context data
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@retval EFI_SUCCESS Legacy16 code loaded
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@retval Other No protocol installed, unload driver.
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**/
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EFI_STATUS
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ShadowAndStartLegacy16 (
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IN LEGACY_BIOS_INSTANCE *Private
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)
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{
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EFI_STATUS Status;
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UINT8 *Ptr;
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UINT8 *PtrEnd;
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BOOLEAN Done;
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EFI_COMPATIBILITY16_TABLE *Table;
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UINT8 CheckSum;
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EFI_IA32_REGISTER_SET Regs;
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EFI_TO_COMPATIBILITY16_INIT_TABLE *EfiToLegacy16InitTable;
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EFI_TO_COMPATIBILITY16_BOOT_TABLE *EfiToLegacy16BootTable;
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VOID *LegacyBiosImage;
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UINTN LegacyBiosImageSize;
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UINTN E820Size;
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UINT32 *ClearPtr;
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BBS_TABLE *BbsTable;
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LEGACY_EFI_HDD_TABLE *LegacyEfiHddTable;
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UINTN Index;
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UINT32 TpmPointer;
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VOID *TpmBinaryImage;
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UINTN TpmBinaryImageSize;
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UINTN Location;
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UINTN Alignment;
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UINTN TempData;
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EFI_PHYSICAL_ADDRESS Address;
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UINT16 OldMask;
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UINT16 NewMask;
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UINT32 Granularity;
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EFI_GCD_MEMORY_SPACE_DESCRIPTOR Descriptor;
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Location = 0;
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Alignment = 0;
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//
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// we allocate the C/D/E/F segment as RT code so no one will use it any more.
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//
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Address = 0xC0000;
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gDS->GetMemorySpaceDescriptor (Address, &Descriptor);
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if (Descriptor.GcdMemoryType == EfiGcdMemoryTypeSystemMemory) {
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//
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// If it is already reserved, we should be safe, or else we allocate it.
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//
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Status = gBS->AllocatePages (
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AllocateAddress,
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EfiRuntimeServicesCode,
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0x40000/EFI_PAGE_SIZE,
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&Address
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);
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if (EFI_ERROR (Status)) {
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//
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// Bugbug: need to figure out whether C/D/E/F segment should be marked as reserved memory.
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//
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DEBUG ((DEBUG_ERROR, "Failed to allocate the C/D/E/F segment Status = %r", Status));
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}
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}
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//
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// start testtest
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// GetTimerValue (&Ticker);
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//
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// gRT->SetVariable (L"StartLegacy",
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// &gEfiGlobalVariableGuid,
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// EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
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// sizeof (UINT64),
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// (VOID *)&Ticker
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// );
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// end testtest
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//
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EfiToLegacy16BootTable = &Private->IntThunk->EfiToLegacy16BootTable;
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Status = Private->LegacyBiosPlatform->GetPlatformInfo (
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Private->LegacyBiosPlatform,
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EfiGetPlatformBinarySystemRom,
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&LegacyBiosImage,
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&LegacyBiosImageSize,
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&Location,
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&Alignment,
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0,
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0
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);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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Private->BiosStart = (UINT32) (0x100000 - LegacyBiosImageSize);
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Private->OptionRom = 0xc0000;
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Private->LegacyBiosImageSize = (UINT32) LegacyBiosImageSize;
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//
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// Can only shadow into memory allocated for legacy useage.
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//
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ASSERT (Private->BiosStart > Private->OptionRom);
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//
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// Shadow Legacy BIOS. Turn on memory and copy image
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//
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Private->LegacyRegion->UnLock (Private->LegacyRegion, 0xc0000, 0x40000, &Granularity);
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ClearPtr = (VOID *) ((UINTN) 0xc0000);
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//
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// Initialize region from 0xc0000 to start of BIOS to all ffs. This allows unused
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// regions to be used by EMM386 etc.
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//
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SetMem ((VOID *) ClearPtr, (UINTN) (0x40000 - LegacyBiosImageSize), 0xff);
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TempData = Private->BiosStart;
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CopyMem (
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(VOID *) TempData,
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LegacyBiosImage,
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(UINTN) LegacyBiosImageSize
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);
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Private->Cpu->FlushDataCache (Private->Cpu, 0xc0000, 0x40000, EfiCpuFlushTypeWriteBackInvalidate);
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//
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// Search for Legacy16 table in Shadowed ROM
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//
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Done = FALSE;
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Table = NULL;
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for (Ptr = (UINT8 *) TempData; Ptr < (UINT8 *) ((UINTN) 0x100000) && !Done; Ptr += 0x10) {
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if (*(UINT32 *) Ptr == SIGNATURE_32 ('I', 'F', 'E', '$')) {
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Table = (EFI_COMPATIBILITY16_TABLE *) Ptr;
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PtrEnd = Ptr + Table->TableLength;
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for (CheckSum = 0; Ptr < PtrEnd; Ptr++) {
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CheckSum = (UINT8) (CheckSum +*Ptr);
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}
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Done = TRUE;
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}
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}
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if (Table == NULL) {
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DEBUG ((EFI_D_ERROR, "No Legacy16 table found\n"));
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return EFI_NOT_FOUND;
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}
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if (!Done) {
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//
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// Legacy16 table header checksum error.
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//
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DEBUG ((EFI_D_ERROR, "Legacy16 table found with bad talbe header checksum\n"));
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}
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//
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// Remember location of the Legacy16 table
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//
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Private->Legacy16Table = Table;
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Private->Legacy16CallSegment = Table->Compatibility16CallSegment;
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Private->Legacy16CallOffset = Table->Compatibility16CallOffset;
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EfiToLegacy16InitTable = &Private->IntThunk->EfiToLegacy16InitTable;
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Private->Legacy16InitPtr = EfiToLegacy16InitTable;
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Private->Legacy16BootPtr = &Private->IntThunk->EfiToLegacy16BootTable;
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Private->InternalIrqRoutingTable = NULL;
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Private->NumberIrqRoutingEntries = 0;
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Private->BbsTablePtr = NULL;
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Private->LegacyEfiHddTable = NULL;
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Private->DiskEnd = 0;
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Private->Disk4075 = 0;
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Private->HddTablePtr = &Private->IntThunk->EfiToLegacy16BootTable.HddInfo;
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Private->NumberHddControllers = MAX_IDE_CONTROLLER;
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Private->Dump[0] = 'D';
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Private->Dump[1] = 'U';
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Private->Dump[2] = 'M';
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Private->Dump[3] = 'P';
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ZeroMem (
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Private->Legacy16BootPtr,
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sizeof (EFI_TO_COMPATIBILITY16_BOOT_TABLE)
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);
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//
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// Store away a copy of the EFI System Table
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//
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Table->EfiSystemTable = (UINT32) (UINTN) gST;
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//
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// IPF CSM integration -Bug
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//
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// Construct the Legacy16 boot memory map. This sets up number of
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// E820 entries.
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//
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LegacyBiosBuildE820 (Private, &E820Size);
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//
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// Initialize BDA and EBDA standard values needed to load Legacy16 code
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//
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LegacyBiosInitBda (Private);
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LegacyBiosInitCmos (Private);
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//
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// All legacy interrupt should be masked when do initialization work from legacy 16 code.
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//
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Private->Legacy8259->GetMask(Private->Legacy8259, &OldMask, NULL, NULL, NULL);
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NewMask = 0xFFFF;
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Private->Legacy8259->SetMask(Private->Legacy8259, &NewMask, NULL, NULL, NULL);
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//
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// Call into Legacy16 code to do an INIT
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//
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ZeroMem (&Regs, sizeof (EFI_IA32_REGISTER_SET));
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Regs.X.AX = Legacy16InitializeYourself;
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Regs.X.ES = EFI_SEGMENT (*((UINT32 *) &EfiToLegacy16InitTable));
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Regs.X.BX = EFI_OFFSET (*((UINT32 *) &EfiToLegacy16InitTable));
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Private->LegacyBios.FarCall86 (
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&Private->LegacyBios,
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Table->Compatibility16CallSegment,
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Table->Compatibility16CallOffset,
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&Regs,
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NULL,
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0
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);
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//
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// Restore original legacy interrupt mask value
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//
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Private->Legacy8259->SetMask(Private->Legacy8259, &OldMask, NULL, NULL, NULL);
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if (Regs.X.AX != 0) {
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return EFI_DEVICE_ERROR;
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}
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//
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// start testtest
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// GetTimerValue (&Ticker);
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//
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// gRT->SetVariable (L"BackFromInitYourself",
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// &gEfiGlobalVariableGuid,
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// EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
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// sizeof (UINT64),
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// (VOID *)&Ticker
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// );
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// end testtest
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//
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// Copy E820 table after InitializeYourself is completed
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//
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ZeroMem (&Regs, sizeof (EFI_IA32_REGISTER_SET));
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Regs.X.AX = Legacy16GetTableAddress;
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Regs.X.CX = (UINT16) E820Size;
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Regs.X.DX = 1;
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Private->LegacyBios.FarCall86 (
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&Private->LegacyBios,
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Table->Compatibility16CallSegment,
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Table->Compatibility16CallOffset,
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&Regs,
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NULL,
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0
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);
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Table->E820Pointer = (UINT32) (Regs.X.DS * 16 + Regs.X.BX);
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Table->E820Length = (UINT32) E820Size;
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if (Regs.X.AX != 0) {
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DEBUG ((EFI_D_ERROR, "Legacy16 E820 length insufficient\n"));
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} else {
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TempData = Table->E820Pointer;
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CopyMem ((VOID *) TempData, Private->E820Table, E820Size);
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}
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//
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// Get PnPInstallationCheck Info.
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//
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Private->PnPInstallationCheckSegment = Table->PnPInstallationCheckSegment;
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Private->PnPInstallationCheckOffset = Table->PnPInstallationCheckOffset;
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//
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// Check if PCI Express is supported. If yes, Save base address.
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//
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Status = Private->LegacyBiosPlatform->GetPlatformInfo (
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Private->LegacyBiosPlatform,
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EfiGetPlatformPciExpressBase,
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NULL,
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NULL,
|
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&Location,
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&Alignment,
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0,
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0
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);
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if (!EFI_ERROR (Status)) {
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Private->Legacy16Table->PciExpressBase = (UINT32)Location;
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Location = 0;
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}
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//
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// Check if TPM is supported. If yes get a region in E0000,F0000 to copy it
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// into, copy it and update pointer to binary image. This needs to be
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// done prior to any OPROM for security purposes.
|
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//
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Status = Private->LegacyBiosPlatform->GetPlatformInfo (
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Private->LegacyBiosPlatform,
|
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EfiGetPlatformBinaryTpmBinary,
|
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&TpmBinaryImage,
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&TpmBinaryImageSize,
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&Location,
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&Alignment,
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0,
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0
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);
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if (!EFI_ERROR (Status)) {
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|
|
ZeroMem (&Regs, sizeof (EFI_IA32_REGISTER_SET));
|
|
Regs.X.AX = Legacy16GetTableAddress;
|
|
Regs.X.CX = (UINT16) TpmBinaryImageSize;
|
|
Regs.X.DX = 1;
|
|
Private->LegacyBios.FarCall86 (
|
|
&Private->LegacyBios,
|
|
Table->Compatibility16CallSegment,
|
|
Table->Compatibility16CallOffset,
|
|
&Regs,
|
|
NULL,
|
|
0
|
|
);
|
|
|
|
TpmPointer = (UINT32) (Regs.X.DS * 16 + Regs.X.BX);
|
|
if (Regs.X.AX != 0) {
|
|
DEBUG ((EFI_D_ERROR, "TPM cannot be loaded\n"));
|
|
} else {
|
|
CopyMem ((VOID *) (UINTN)TpmPointer, TpmBinaryImage, TpmBinaryImageSize);
|
|
Table->TpmSegment = Regs.X.DS;
|
|
Table->TpmOffset = Regs.X.BX;
|
|
|
|
}
|
|
}
|
|
//
|
|
// Lock the Legacy BIOS region
|
|
//
|
|
Private->Cpu->FlushDataCache (Private->Cpu, Private->BiosStart, (UINT32) LegacyBiosImageSize, EfiCpuFlushTypeWriteBackInvalidate);
|
|
Private->LegacyRegion->Lock (Private->LegacyRegion, Private->BiosStart, (UINT32) LegacyBiosImageSize, &Granularity);
|
|
|
|
//
|
|
// Get the BbsTable from LOW_MEMORY_THUNK
|
|
//
|
|
BbsTable = (BBS_TABLE *)(UINTN)Private->IntThunk->BbsTable;
|
|
ZeroMem ((VOID *)BbsTable, sizeof (Private->IntThunk->BbsTable));
|
|
|
|
EfiToLegacy16BootTable->BbsTable = (UINT32)(UINTN)BbsTable;
|
|
Private->BbsTablePtr = (VOID *) BbsTable;
|
|
//
|
|
// Skip Floppy and possible onboard IDE drives
|
|
//
|
|
EfiToLegacy16BootTable->NumberBbsEntries = 1 + 2 * MAX_IDE_CONTROLLER;
|
|
|
|
for (Index = 0; Index < (sizeof (Private->IntThunk->BbsTable) / sizeof (BBS_TABLE)); Index++) {
|
|
BbsTable[Index].BootPriority = BBS_IGNORE_ENTRY;
|
|
}
|
|
//
|
|
// Allocate space for Legacy HDD table
|
|
//
|
|
LegacyEfiHddTable = (LEGACY_EFI_HDD_TABLE *) AllocateZeroPool ((UINTN) MAX_HDD_ENTRIES * sizeof (LEGACY_EFI_HDD_TABLE));
|
|
ASSERT (LegacyEfiHddTable);
|
|
|
|
Private->LegacyEfiHddTable = LegacyEfiHddTable;
|
|
Private->LegacyEfiHddTableIndex = 0x00;
|
|
|
|
//
|
|
// start testtest
|
|
// GetTimerValue (&Ticker);
|
|
//
|
|
// gRT->SetVariable (L"EndOfLoadFv",
|
|
// &gEfiGlobalVariableGuid,
|
|
// EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
|
|
// sizeof (UINT64),
|
|
// (VOID *)&Ticker
|
|
// );
|
|
// end testtest
|
|
//
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
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
|
|
)
|
|
{
|
|
LEGACY_BIOS_INSTANCE *Private;
|
|
|
|
//
|
|
// EFI_LEGACY_BIOS_PLATFORM_PROTOCOL *LegacyBiosPlatform;
|
|
// EFI_LEGACY16_TABLE *Legacy16Table;
|
|
//
|
|
Private = LEGACY_BIOS_INSTANCE_FROM_THIS (This);
|
|
|
|
//
|
|
// LegacyBiosPlatform = Private->LegacyBiosPlatform;
|
|
// Legacy16Table = Private->Legacy16Table;
|
|
//
|
|
// Shadow PCI ROMs. We must do this near the end since this will kick
|
|
// of Native EFI drivers that may be needed to collect info for Legacy16
|
|
//
|
|
// WARNING: PciIo is gone after this call.
|
|
//
|
|
PciProgramAllInterruptLineRegisters (Private);
|
|
|
|
PciShadowRoms (Private);
|
|
|
|
//
|
|
// Shadow PXE base code, BIS etc.
|
|
//
|
|
// LegacyBiosPlatform->ShadowServiceRoms (LegacyBiosPlatform,
|
|
// &Private->OptionRom,
|
|
// Legacy16Table);
|
|
//
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
Get the PCI BIOS interface version.
|
|
|
|
@param Private Driver private data.
|
|
|
|
@return The PCI interface version number in Binary Coded Decimal (BCD) format.
|
|
E.g.: 0x0210 indicates 2.10, 0x0300 indicates 3.00
|
|
|
|
**/
|
|
UINT16
|
|
GetPciInterfaceVersion (
|
|
IN LEGACY_BIOS_INSTANCE *Private
|
|
)
|
|
{
|
|
EFI_IA32_REGISTER_SET Reg;
|
|
BOOLEAN ThunkFailed;
|
|
UINT16 PciInterfaceVersion;
|
|
|
|
PciInterfaceVersion = 0;
|
|
|
|
Reg.X.AX = 0xB101;
|
|
Reg.E.EDI = 0;
|
|
|
|
ThunkFailed = Private->LegacyBios.Int86 (&Private->LegacyBios, 0x1A, &Reg);
|
|
if (!ThunkFailed) {
|
|
//
|
|
// From PCI Firmware 3.0 Specification:
|
|
// If the CARRY FLAG [CF] is cleared and AH is set to 00h, it is still necessary to examine the
|
|
// contents of [EDX] for the presence of the string "PCI" + (trailing space) to fully validate the
|
|
// presence of the PCI function set. [BX] will further indicate the version level, with enough
|
|
// granularity to allow for incremental changes in the code that don't affect the function interface.
|
|
// Version numbers are stored as Binary Coded Decimal (BCD) values. For example, Version 2.10
|
|
// would be returned as a 02h in the [BH] registers and 10h in the [BL] registers.
|
|
//
|
|
if ((Reg.X.Flags.CF == 0) && (Reg.H.AH == 0) && (Reg.E.EDX == SIGNATURE_32 ('P', 'C', 'I', ' '))) {
|
|
PciInterfaceVersion = Reg.X.BX;
|
|
}
|
|
}
|
|
return PciInterfaceVersion;
|
|
}
|
|
|
|
/**
|
|
Callback function to calculate SMBIOS table size, and allocate memory for SMBIOS table.
|
|
SMBIOS table will be copied into EfiReservedMemoryType memory in legacy boot path.
|
|
|
|
@param Event Event whose notification function is being invoked.
|
|
@param Context The pointer to the notification function's context,
|
|
which is implementation-dependent.
|
|
|
|
**/
|
|
VOID
|
|
EFIAPI
|
|
InstallSmbiosEventCallback (
|
|
IN EFI_EVENT Event,
|
|
IN VOID *Context
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
SMBIOS_TABLE_ENTRY_POINT *EntryPointStructure;
|
|
|
|
//
|
|
// Get SMBIOS table from EFI configuration table
|
|
//
|
|
Status = EfiGetSystemConfigurationTable (
|
|
&gEfiSmbiosTableGuid,
|
|
&mRuntimeSmbiosEntryPoint
|
|
);
|
|
if ((EFI_ERROR (Status)) || (mRuntimeSmbiosEntryPoint == NULL)) {
|
|
return;
|
|
}
|
|
|
|
EntryPointStructure = (SMBIOS_TABLE_ENTRY_POINT *) mRuntimeSmbiosEntryPoint;
|
|
|
|
//
|
|
// Allocate memory for SMBIOS Entry Point Structure.
|
|
// CSM framework spec requires SMBIOS table below 4GB in EFI_TO_COMPATIBILITY16_BOOT_TABLE.
|
|
//
|
|
if (mReserveSmbiosEntryPoint == 0) {
|
|
//
|
|
// Entrypoint structure with fixed size is allocated only once.
|
|
//
|
|
mReserveSmbiosEntryPoint = SIZE_4GB - 1;
|
|
Status = gBS->AllocatePages (
|
|
AllocateMaxAddress,
|
|
EfiReservedMemoryType,
|
|
EFI_SIZE_TO_PAGES ((UINTN) (EntryPointStructure->EntryPointLength)),
|
|
&mReserveSmbiosEntryPoint
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
mReserveSmbiosEntryPoint = 0;
|
|
return;
|
|
}
|
|
DEBUG ((EFI_D_INFO, "Allocate memory for Smbios Entry Point Structure\n"));
|
|
}
|
|
|
|
if ((mStructureTableAddress != 0) &&
|
|
(mStructureTablePages < (UINTN) EFI_SIZE_TO_PAGES (EntryPointStructure->TableLength))) {
|
|
//
|
|
// If original buffer is not enough for the new SMBIOS table, free original buffer and re-allocate
|
|
//
|
|
gBS->FreePages (mStructureTableAddress, mStructureTablePages);
|
|
mStructureTableAddress = 0;
|
|
mStructureTablePages = 0;
|
|
DEBUG ((EFI_D_INFO, "Original size is not enough. Re-allocate the memory.\n"));
|
|
}
|
|
|
|
if (mStructureTableAddress == 0) {
|
|
//
|
|
// Allocate reserved memory below 4GB.
|
|
// Smbios spec requires the structure table is below 4GB.
|
|
//
|
|
mStructureTableAddress = SIZE_4GB - 1;
|
|
mStructureTablePages = EFI_SIZE_TO_PAGES (EntryPointStructure->TableLength);
|
|
Status = gBS->AllocatePages (
|
|
AllocateMaxAddress,
|
|
EfiReservedMemoryType,
|
|
mStructureTablePages,
|
|
&mStructureTableAddress
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
gBS->FreePages (
|
|
mReserveSmbiosEntryPoint,
|
|
EFI_SIZE_TO_PAGES ((UINTN) (EntryPointStructure->EntryPointLength))
|
|
);
|
|
mReserveSmbiosEntryPoint = 0;
|
|
mStructureTableAddress = 0;
|
|
mStructureTablePages = 0;
|
|
return;
|
|
}
|
|
DEBUG ((EFI_D_INFO, "Allocate memory for Smbios Structure Table\n"));
|
|
}
|
|
}
|
|
|
|
/**
|
|
Install Driver to produce Legacy BIOS protocol.
|
|
|
|
@param ImageHandle Handle of driver image.
|
|
@param SystemTable Pointer to system table.
|
|
|
|
@retval EFI_SUCCESS Legacy BIOS protocol installed
|
|
@retval No protocol installed, unload driver.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
LegacyBiosInstall (
|
|
IN EFI_HANDLE ImageHandle,
|
|
IN EFI_SYSTEM_TABLE *SystemTable
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
LEGACY_BIOS_INSTANCE *Private;
|
|
EFI_TO_COMPATIBILITY16_INIT_TABLE *EfiToLegacy16InitTable;
|
|
EFI_PHYSICAL_ADDRESS MemoryAddress;
|
|
EFI_PHYSICAL_ADDRESS EbdaReservedBaseAddress;
|
|
VOID *MemoryPtr;
|
|
EFI_PHYSICAL_ADDRESS MemoryAddressUnder1MB;
|
|
UINTN Index;
|
|
UINT32 *BaseVectorMaster;
|
|
EFI_PHYSICAL_ADDRESS StartAddress;
|
|
UINT32 *ClearPtr;
|
|
EFI_PHYSICAL_ADDRESS MemStart;
|
|
UINT32 IntRedirCode;
|
|
UINT32 Granularity;
|
|
BOOLEAN DecodeOn;
|
|
UINT32 MemorySize;
|
|
EFI_GCD_MEMORY_SPACE_DESCRIPTOR Descriptor;
|
|
UINT64 Length;
|
|
UINT8 *SecureBoot;
|
|
EFI_EVENT InstallSmbiosEvent;
|
|
|
|
//
|
|
// Load this driver's image to memory
|
|
//
|
|
Status = RelocateImageUnder4GIfNeeded (ImageHandle, SystemTable);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
//
|
|
// When UEFI Secure Boot is enabled, CSM module will not start any more.
|
|
//
|
|
SecureBoot = NULL;
|
|
GetEfiGlobalVariable2 (EFI_SECURE_BOOT_MODE_NAME, (VOID**)&SecureBoot, NULL);
|
|
if ((SecureBoot != NULL) && (*SecureBoot == SECURE_BOOT_MODE_ENABLE)) {
|
|
FreePool (SecureBoot);
|
|
return EFI_SECURITY_VIOLATION;
|
|
}
|
|
|
|
if (SecureBoot != NULL) {
|
|
FreePool (SecureBoot);
|
|
}
|
|
|
|
Private = &mPrivateData;
|
|
ZeroMem (Private, sizeof (LEGACY_BIOS_INSTANCE));
|
|
|
|
//
|
|
// Grab a copy of all the protocols we depend on. Any error would
|
|
// be a dispatcher bug!.
|
|
//
|
|
Status = gBS->LocateProtocol (&gEfiCpuArchProtocolGuid, NULL, (VOID **) &Private->Cpu);
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
Status = gBS->LocateProtocol (&gEfiTimerArchProtocolGuid, NULL, (VOID **) &Private->Timer);
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
Status = gBS->LocateProtocol (&gEfiLegacyRegion2ProtocolGuid, NULL, (VOID **) &Private->LegacyRegion);
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
Status = gBS->LocateProtocol (&gEfiLegacyBiosPlatformProtocolGuid, NULL, (VOID **) &Private->LegacyBiosPlatform);
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
Status = gBS->LocateProtocol (&gEfiLegacy8259ProtocolGuid, NULL, (VOID **) &Private->Legacy8259);
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
Status = gBS->LocateProtocol (&gEfiLegacyInterruptProtocolGuid, NULL, (VOID **) &Private->LegacyInterrupt);
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
//
|
|
// Locate Memory Test Protocol if exists
|
|
//
|
|
Status = gBS->LocateProtocol (
|
|
&gEfiGenericMemTestProtocolGuid,
|
|
NULL,
|
|
(VOID **) &Private->GenericMemoryTest
|
|
);
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
//
|
|
// Make sure all memory from 0-640K is tested
|
|
//
|
|
for (StartAddress = 0; StartAddress < 0xa0000; ) {
|
|
gDS->GetMemorySpaceDescriptor (StartAddress, &Descriptor);
|
|
if (Descriptor.GcdMemoryType != EfiGcdMemoryTypeReserved) {
|
|
StartAddress = Descriptor.BaseAddress + Descriptor.Length;
|
|
continue;
|
|
}
|
|
Length = MIN (Descriptor.Length, 0xa0000 - StartAddress);
|
|
Private->GenericMemoryTest->CompatibleRangeTest (
|
|
Private->GenericMemoryTest,
|
|
StartAddress,
|
|
Length
|
|
);
|
|
StartAddress = StartAddress + Length;
|
|
}
|
|
//
|
|
// Make sure all memory from 1MB to 16MB is tested and added to memory map
|
|
//
|
|
for (StartAddress = BASE_1MB; StartAddress < BASE_16MB; ) {
|
|
gDS->GetMemorySpaceDescriptor (StartAddress, &Descriptor);
|
|
if (Descriptor.GcdMemoryType != EfiGcdMemoryTypeReserved) {
|
|
StartAddress = Descriptor.BaseAddress + Descriptor.Length;
|
|
continue;
|
|
}
|
|
Length = MIN (Descriptor.Length, BASE_16MB - StartAddress);
|
|
Private->GenericMemoryTest->CompatibleRangeTest (
|
|
Private->GenericMemoryTest,
|
|
StartAddress,
|
|
Length
|
|
);
|
|
StartAddress = StartAddress + Length;
|
|
}
|
|
|
|
Private->Signature = LEGACY_BIOS_INSTANCE_SIGNATURE;
|
|
|
|
Private->LegacyBios.Int86 = LegacyBiosInt86;
|
|
Private->LegacyBios.FarCall86 = LegacyBiosFarCall86;
|
|
Private->LegacyBios.CheckPciRom = LegacyBiosCheckPciRom;
|
|
Private->LegacyBios.InstallPciRom = LegacyBiosInstallPciRom;
|
|
Private->LegacyBios.LegacyBoot = LegacyBiosLegacyBoot;
|
|
Private->LegacyBios.UpdateKeyboardLedStatus = LegacyBiosUpdateKeyboardLedStatus;
|
|
Private->LegacyBios.GetBbsInfo = LegacyBiosGetBbsInfo;
|
|
Private->LegacyBios.ShadowAllLegacyOproms = LegacyBiosShadowAllLegacyOproms;
|
|
Private->LegacyBios.PrepareToBootEfi = LegacyBiosPrepareToBootEfi;
|
|
Private->LegacyBios.GetLegacyRegion = LegacyBiosGetLegacyRegion;
|
|
Private->LegacyBios.CopyLegacyRegion = LegacyBiosCopyLegacyRegion;
|
|
Private->LegacyBios.BootUnconventionalDevice = LegacyBiosBootUnconventionalDevice;
|
|
|
|
Private->ImageHandle = ImageHandle;
|
|
|
|
//
|
|
// Enable read attribute of legacy region.
|
|
//
|
|
DecodeOn = TRUE;
|
|
Private->LegacyRegion->Decode (
|
|
Private->LegacyRegion,
|
|
0xc0000,
|
|
0x40000,
|
|
&Granularity,
|
|
&DecodeOn
|
|
);
|
|
//
|
|
// Set Cachebility for legacy region
|
|
// BUGBUG: Comments about this legacy region cacheability setting
|
|
// This setting will make D865GCHProduction CSM Unhappy
|
|
//
|
|
if (PcdGetBool (PcdLegacyBiosCacheLegacyRegion)) {
|
|
gDS->SetMemorySpaceAttributes (
|
|
0x0,
|
|
0xA0000,
|
|
EFI_MEMORY_WB
|
|
);
|
|
gDS->SetMemorySpaceAttributes (
|
|
0xc0000,
|
|
0x40000,
|
|
EFI_MEMORY_WB
|
|
);
|
|
}
|
|
|
|
gDS->SetMemorySpaceAttributes (
|
|
0xA0000,
|
|
0x20000,
|
|
EFI_MEMORY_UC
|
|
);
|
|
|
|
//
|
|
// Allocate 0 - 4K for real mode interupt vectors and BDA.
|
|
//
|
|
AllocateLegacyMemory (
|
|
AllocateAddress,
|
|
0,
|
|
1,
|
|
&MemoryAddress
|
|
);
|
|
ASSERT (MemoryAddress == 0x000000000);
|
|
|
|
ClearPtr = (VOID *) ((UINTN) 0x0000);
|
|
|
|
//
|
|
// Initialize region from 0x0000 to 4k. This initializes interrupt vector
|
|
// range.
|
|
//
|
|
gBS->SetMem ((VOID *) ClearPtr, 0x400, INITIAL_VALUE_BELOW_1K);
|
|
ZeroMem ((VOID *) ((UINTN)ClearPtr + 0x400), 0xC00);
|
|
|
|
//
|
|
// Allocate pages for OPROM usage
|
|
//
|
|
MemorySize = PcdGet32 (PcdEbdaReservedMemorySize);
|
|
ASSERT ((MemorySize & 0xFFF) == 0);
|
|
|
|
Status = AllocateLegacyMemory (
|
|
AllocateAddress,
|
|
CONVENTIONAL_MEMORY_TOP - MemorySize,
|
|
EFI_SIZE_TO_PAGES (MemorySize),
|
|
&MemoryAddress
|
|
);
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
ZeroMem ((VOID *) ((UINTN) MemoryAddress), MemorySize);
|
|
|
|
//
|
|
// Allocate all 32k chunks from 0x60000 ~ 0x88000 for Legacy OPROMs that
|
|
// don't use PMM but look for zeroed memory. Note that various non-BBS
|
|
// OpROMs expect different areas to be free
|
|
//
|
|
EbdaReservedBaseAddress = MemoryAddress;
|
|
MemoryAddress = PcdGet32 (PcdOpromReservedMemoryBase);
|
|
MemorySize = PcdGet32 (PcdOpromReservedMemorySize);
|
|
//
|
|
// Check if base address and size for reserved memory are 4KB aligned.
|
|
//
|
|
ASSERT ((MemoryAddress & 0xFFF) == 0);
|
|
ASSERT ((MemorySize & 0xFFF) == 0);
|
|
//
|
|
// Check if the reserved memory is below EBDA reserved range.
|
|
//
|
|
ASSERT ((MemoryAddress < EbdaReservedBaseAddress) && ((MemoryAddress + MemorySize - 1) < EbdaReservedBaseAddress));
|
|
for (MemStart = MemoryAddress; MemStart < MemoryAddress + MemorySize; MemStart += 0x1000) {
|
|
Status = AllocateLegacyMemory (
|
|
AllocateAddress,
|
|
MemStart,
|
|
1,
|
|
&StartAddress
|
|
);
|
|
if (!EFI_ERROR (Status)) {
|
|
MemoryPtr = (VOID *) ((UINTN) StartAddress);
|
|
ZeroMem (MemoryPtr, 0x1000);
|
|
} else {
|
|
DEBUG ((EFI_D_ERROR, "WARNING: Allocate legacy memory fail for SCSI card - %x\n", MemStart));
|
|
}
|
|
}
|
|
|
|
//
|
|
// Allocate low PMM memory and zero it out
|
|
//
|
|
MemorySize = PcdGet32 (PcdLowPmmMemorySize);
|
|
ASSERT ((MemorySize & 0xFFF) == 0);
|
|
Status = AllocateLegacyMemory (
|
|
AllocateMaxAddress,
|
|
CONVENTIONAL_MEMORY_TOP,
|
|
EFI_SIZE_TO_PAGES (MemorySize),
|
|
&MemoryAddressUnder1MB
|
|
);
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
ZeroMem ((VOID *) ((UINTN) MemoryAddressUnder1MB), MemorySize);
|
|
|
|
//
|
|
// Allocate space for thunker and Init Thunker
|
|
//
|
|
Status = AllocateLegacyMemory (
|
|
AllocateMaxAddress,
|
|
CONVENTIONAL_MEMORY_TOP,
|
|
(sizeof (LOW_MEMORY_THUNK) / EFI_PAGE_SIZE) + 2,
|
|
&MemoryAddress
|
|
);
|
|
ASSERT_EFI_ERROR (Status);
|
|
Private->IntThunk = (LOW_MEMORY_THUNK *) (UINTN) MemoryAddress;
|
|
EfiToLegacy16InitTable = &Private->IntThunk->EfiToLegacy16InitTable;
|
|
EfiToLegacy16InitTable->ThunkStart = (UINT32) (EFI_PHYSICAL_ADDRESS) (UINTN) MemoryAddress;
|
|
EfiToLegacy16InitTable->ThunkSizeInBytes = (UINT32) (sizeof (LOW_MEMORY_THUNK));
|
|
|
|
Status = LegacyBiosInitializeThunk (Private);
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
//
|
|
// Init the legacy memory map in memory < 1 MB.
|
|
//
|
|
EfiToLegacy16InitTable->BiosLessThan1MB = (UINT32) MemoryAddressUnder1MB;
|
|
EfiToLegacy16InitTable->LowPmmMemory = (UINT32) MemoryAddressUnder1MB;
|
|
EfiToLegacy16InitTable->LowPmmMemorySizeInBytes = MemorySize;
|
|
|
|
MemorySize = PcdGet32 (PcdHighPmmMemorySize);
|
|
ASSERT ((MemorySize & 0xFFF) == 0);
|
|
//
|
|
// Allocate high PMM Memory under 16 MB
|
|
//
|
|
Status = AllocateLegacyMemory (
|
|
AllocateMaxAddress,
|
|
0x1000000,
|
|
EFI_SIZE_TO_PAGES (MemorySize),
|
|
&MemoryAddress
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
//
|
|
// If it fails, allocate high PMM Memory under 4GB
|
|
//
|
|
Status = AllocateLegacyMemory (
|
|
AllocateMaxAddress,
|
|
0xFFFFFFFF,
|
|
EFI_SIZE_TO_PAGES (MemorySize),
|
|
&MemoryAddress
|
|
);
|
|
}
|
|
if (!EFI_ERROR (Status)) {
|
|
EfiToLegacy16InitTable->HiPmmMemory = (UINT32) (EFI_PHYSICAL_ADDRESS) (UINTN) MemoryAddress;
|
|
EfiToLegacy16InitTable->HiPmmMemorySizeInBytes = MemorySize;
|
|
}
|
|
|
|
//
|
|
// ShutdownAPs();
|
|
//
|
|
// Start the Legacy BIOS;
|
|
//
|
|
Status = ShadowAndStartLegacy16 (Private);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
//
|
|
// Initialize interrupt redirection code and entries;
|
|
// IDT Vectors 0x68-0x6f must be redirected to IDT Vectors 0x08-0x0f.
|
|
//
|
|
CopyMem (
|
|
Private->IntThunk->InterruptRedirectionCode,
|
|
(VOID *) (UINTN) InterruptRedirectionTemplate,
|
|
sizeof (Private->IntThunk->InterruptRedirectionCode)
|
|
);
|
|
|
|
//
|
|
// Save Unexpected interrupt vector so can restore it just prior to boot
|
|
//
|
|
BaseVectorMaster = (UINT32 *) (sizeof (UINT32) * PROTECTED_MODE_BASE_VECTOR_MASTER);
|
|
Private->BiosUnexpectedInt = BaseVectorMaster[0];
|
|
IntRedirCode = (UINT32) (UINTN) Private->IntThunk->InterruptRedirectionCode;
|
|
for (Index = 0; Index < 8; Index++) {
|
|
BaseVectorMaster[Index] = (EFI_SEGMENT (IntRedirCode + Index * 4) << 16) | EFI_OFFSET (IntRedirCode + Index * 4);
|
|
}
|
|
//
|
|
// Save EFI value
|
|
//
|
|
Private->ThunkSeg = (UINT16) (EFI_SEGMENT (IntRedirCode));
|
|
|
|
//
|
|
// Allocate reserved memory for SMBIOS table used in legacy boot if SMBIOS table exists
|
|
//
|
|
InstallSmbiosEventCallback (NULL, NULL);
|
|
|
|
//
|
|
// Create callback function to update the size of reserved memory after LegacyBiosDxe starts
|
|
//
|
|
Status = gBS->CreateEventEx (
|
|
EVT_NOTIFY_SIGNAL,
|
|
TPL_NOTIFY,
|
|
InstallSmbiosEventCallback,
|
|
NULL,
|
|
&gEfiSmbiosTableGuid,
|
|
&InstallSmbiosEvent
|
|
);
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
//
|
|
// Make a new handle and install the protocol
|
|
//
|
|
Private->Handle = NULL;
|
|
Status = gBS->InstallProtocolInterface (
|
|
&Private->Handle,
|
|
&gEfiLegacyBiosProtocolGuid,
|
|
EFI_NATIVE_INTERFACE,
|
|
&Private->LegacyBios
|
|
);
|
|
Private->Csm16PciInterfaceVersion = GetPciInterfaceVersion (Private);
|
|
|
|
DEBUG ((EFI_D_INFO, "CSM16 PCI BIOS Interface Version: %02x.%02x\n",
|
|
(UINT8) (Private->Csm16PciInterfaceVersion >> 8),
|
|
(UINT8) Private->Csm16PciInterfaceVersion
|
|
));
|
|
ASSERT (Private->Csm16PciInterfaceVersion != 0);
|
|
return Status;
|
|
}
|