diff options
Diffstat (limited to 'IntelFrameworkModulePkg/Csm/BiosThunk/Snp16Dxe/Misc.c')
| -rw-r--r-- | IntelFrameworkModulePkg/Csm/BiosThunk/Snp16Dxe/Misc.c | 956 |
1 files changed, 956 insertions, 0 deletions
diff --git a/IntelFrameworkModulePkg/Csm/BiosThunk/Snp16Dxe/Misc.c b/IntelFrameworkModulePkg/Csm/BiosThunk/Snp16Dxe/Misc.c new file mode 100644 index 0000000000..0b3543e12c --- /dev/null +++ b/IntelFrameworkModulePkg/Csm/BiosThunk/Snp16Dxe/Misc.c @@ -0,0 +1,956 @@ +/** @file
+ Helper Routines that use a PXE-enabled NIC option ROM.
+
+Copyright (c) 1999 - 2010, Intel Corporation. All rights reserved.<BR>
+
+This program and the accompanying materials
+are licensed and made available under the terms and conditions
+of the BSD License which accompanies this distribution. The
+full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include "BiosSnp16.h"
+
+#define TO_SEGMENT(x) ((UINT16) (RShiftU64 ((UINT32)(UINTN) (x), 4) & 0xF000))
+#define TO_OFFSET(x) ((UINT16) ((UINT32)(UINTN) (x) & 0xFFFF))
+#define PARAGRAPH_SIZE 0x10
+#define IVT_BASE 0x00000000
+
+#pragma pack(1)
+typedef struct {
+ UINT16 Signature; ///< 0xaa55
+ UINT8 ROMlength; ///< size of this ROM in 512 byte blocks
+ UINT8 InitEntryPoint[4]; ///< a jump to the initialization routine
+ UINT8 Reserved[0xf]; ///< various
+ UINT16 PxeRomIdOffset; ///< offset of UNDI, $BC$, or BUSD ROM ID structure
+ UINT16 PcirHeaderOffset; ///< offset of PCI Expansion Header
+ UINT16 PnpHeaderOffset; ///< offset of Plug and Play Expansion Header
+} OPTION_ROM_HEADER;
+#pragma pack()
+
+UINT32 CachedVectorAddress[0x100];
+
+/**
+ Cache Interrupt verctor address converted from IVT number.
+
+ @param VectorNumber IVT number
+
+ @retval EFI_SUCCESS Success to operation.
+**/
+EFI_STATUS
+CacheVectorAddress (
+ UINT8 VectorNumber
+ )
+{
+ UINT32 *Address;
+
+ Address = (UINT32 *)(UINTN) (IVT_BASE + VectorNumber * 4);
+ CachedVectorAddress[VectorNumber] = *Address;
+ return EFI_SUCCESS;
+}
+
+/**
+ Get interrupt vector address according to IVT number.
+
+ @param VectorNumber Given IVT number
+
+ @return cached interrupt vector address.
+**/
+EFI_STATUS
+RestoreCachedVectorAddress (
+ UINT8 VectorNumber
+ )
+{
+ UINT32 *Address;
+
+ Address = (UINT32 *)(UINTN) (IVT_BASE + VectorNumber * 4);
+ *Address = CachedVectorAddress[VectorNumber];
+ return EFI_SUCCESS;
+}
+
+/**
+ Print Undi loader table.
+
+ @param UndiLoaderStructure Point to Undi Loader table structure.
+
+**/
+VOID
+Print_Undi_Loader_Table (
+ VOID *UndiLoaderStructure
+ )
+{
+ UNDI_LOADER_T *DisplayPointer;
+
+ DisplayPointer = (UNDI_LOADER_T *) UndiLoaderStructure;
+
+ DEBUG ((DEBUG_NET, "Before Parsing the table contents, the table itself lives\n"));
+ DEBUG ((DEBUG_NET, "\tat the address 0x%X\n\r", (UINT32)(UINTN) UndiLoaderStructure));
+
+ DEBUG ((DEBUG_NET, "\n\rStatus = 0x%X\n\r", DisplayPointer->Status));
+ DEBUG ((DEBUG_NET, "\t_AX_= 0x%X\n\r", DisplayPointer->Ax));
+ DEBUG ((DEBUG_NET, "\t_BX_= 0x%X\n\r", DisplayPointer->Bx));
+ DEBUG ((DEBUG_NET, "\t_DX_= 0x%X\n\r", DisplayPointer->Dx));
+ DEBUG ((DEBUG_NET, "\t_DI_= 0x%X\n\r", DisplayPointer->Di));
+ DEBUG ((DEBUG_NET, "\t_ES_= 0x%X\n\r", DisplayPointer->Es));
+ DEBUG ((DEBUG_NET, "\tUNDI_DS= 0x%X\n\r", DisplayPointer->Undi_Ds));
+ DEBUG ((DEBUG_NET, "\tUNDI_CS= 0x%X\n\r", DisplayPointer->Undi_Cs));
+ DEBUG ((DEBUG_NET, "\tPXEptr:SEG= 0x%X\n\r", (UINT16) DisplayPointer->PXEptr.Segment));
+ DEBUG ((DEBUG_NET, "\tPXEptr:OFF= 0x%X\n\r", (UINT16) DisplayPointer->PXEptr.Offset));
+ DEBUG ((DEBUG_NET, "\tPXENVptr:SEG= 0x%X\n\r", (UINT16) DisplayPointer->PXENVptr.Segment));
+ DEBUG ((DEBUG_NET, "\tPXENVptr:OFF= 0x%X\n\r", (UINT16) DisplayPointer->PXENVptr.Offset));
+}
+
+/**
+ Simple table dumper. The ROMID table is necessary in order to effect
+ the "Early UNDI" trick. Herein, the UNDI layer can be loaded in the
+ pre-boot phase without having to download a Network Boot Program
+ across the wire. It is required in the implementation in that we
+ are not using PXE.
+
+ @param RomIDStructure Point to RomID structure.
+
+**/
+VOID
+Print_ROMID_Table (
+ IN VOID *RomIDStructure
+ )
+{
+ UNDI_ROMID_T *DisplayPointer;
+
+ DisplayPointer = (UNDI_ROMID_T *) RomIDStructure;
+
+ DEBUG ((DEBUG_NET, "Before Parsing the table contents, the table itself lives\n"));
+ DEBUG ((DEBUG_NET, "\tat the address 0x%X\n\r", (UINT32)(UINTN) RomIDStructure));
+
+ DEBUG (
+ (DEBUG_NET,
+ "\n\rROMID %c%c%c%c\n\r",
+ DisplayPointer->Signature[0],
+ DisplayPointer->Signature[1],
+ DisplayPointer->Signature[2],
+ DisplayPointer->Signature[3])
+ );
+
+ DEBUG (
+ (DEBUG_NET,
+ "Length of this structure in bytes = 0x%X\n\r",
+ DisplayPointer->StructLength)
+ );
+ DEBUG (
+ (DEBUG_NET,
+ "Use to make byte checksum of this structure == zero is = 0x%X\n\r",
+ DisplayPointer->StructCksum)
+ );
+ DEBUG (
+ (DEBUG_NET,
+ "Structure format revision number= 0x%X\n\r",
+ DisplayPointer->StructRev)
+ );
+ DEBUG (
+ (DEBUG_NET,
+ "API Revision number = 0x%X 0x%X 0x%X\n\r",
+ DisplayPointer->UNDI_Rev[0],
+ DisplayPointer->UNDI_Rev[1],
+ DisplayPointer->UNDI_Rev[2])
+ );
+ DEBUG (
+ (DEBUG_NET,
+ "Offset of UNDI loader routine in the option ROM image= 0x%X\n\r",
+ DisplayPointer->UNDI_Loader)
+ );
+ DEBUG ((DEBUG_NET, "From the data above, the absolute entry point of the UNDI loader is\n\r"));
+ DEBUG (
+ (DEBUG_NET,
+ "\tat address 0x%X\n\r",
+ (UINT32) (DisplayPointer->UNDI_Loader + ((UINT32) (UINTN)(DisplayPointer - 0x20) & 0xFFFF0)))
+ );
+ DEBUG ((DEBUG_NET, "Minimum stack segment size, in bytes,\n\r"));
+ DEBUG (
+ (DEBUG_NET,
+ "needed to load and run the UNDI= 0x%X \n\r",
+ DisplayPointer->StackSize)
+ );
+ DEBUG (
+ (DEBUG_NET,
+ "UNDI runtime code and data = 0x%X\n\r",
+ DisplayPointer->DataSize)
+ );
+ DEBUG (
+ (DEBUG_NET,
+ "Segment size = 0x%X\n\r",
+ DisplayPointer->CodeSize)
+ );
+ DEBUG (
+ (DEBUG_NET,
+ "\n\rBus Type = %c%c%c%c\n\r",
+ DisplayPointer->BusType[0],
+ DisplayPointer->BusType[1],
+ DisplayPointer->BusType[2],
+ DisplayPointer->BusType[3])
+ );
+}
+
+/**
+ Print PXE table.
+
+ @param PxeTable Point to PXE table structure
+
+**/
+VOID
+Print_PXE_Table (
+ IN VOID* PxeTable
+ )
+{
+ PXE_T *DisplayPointer;
+ UINTN Index;
+ UINT8 *Dptr;
+
+ DisplayPointer = (PXE_T *) PxeTable;
+ Dptr = (UINT8 *) PxeTable;
+
+ DEBUG ((DEBUG_NET, "This is the PXE table at address 0x%X\n\r", PxeTable));
+
+ DEBUG ((DEBUG_NET, "A dump of the 0x%X bytes is:\n\r", sizeof (PXE_T)));
+
+ for (Index = 0; Index < sizeof (PXE_T); Index++) {
+ if ((Index % 0x10) == 0) {
+ DEBUG ((DEBUG_NET, "\t\n\r"));
+ }
+
+ DEBUG ((DEBUG_NET, " 0x%X ", *Dptr++));
+ }
+
+ DEBUG ((DEBUG_NET, "\n\r"));
+ DEBUG (
+ (DEBUG_NET,
+ "\n\rPXE %c%c%c%c%c%c\n\r",
+ DisplayPointer->Signature[0],
+ DisplayPointer->Signature[1],
+ DisplayPointer->Signature[2],
+ DisplayPointer->Signature[3])
+ );
+ DEBUG (
+ (DEBUG_NET,
+ "Length of this structure in bytes = 0x%X\n\r",
+ DisplayPointer->StructLength)
+ );
+ DEBUG (
+ (DEBUG_NET,
+ "Use to make byte checksum of this structure == zero is = 0x%X\n\r",
+ DisplayPointer->StructCksum)
+ );
+ DEBUG (
+ (DEBUG_NET,
+ "Structure format revision number = 0x%X\n\r",
+ DisplayPointer->StructRev)
+ );
+ DEBUG (
+ (DEBUG_NET,
+ "Must be zero, is equal to 0x%X\n\r",
+ DisplayPointer->Reserved1)
+ );
+ DEBUG (
+ (DEBUG_NET,
+ "Far pointer to UNDI ROMID = 0x%X\n\r",
+ (UINT32) (DisplayPointer->Undi.Segment << 0x4 | DisplayPointer->Undi.Offset))
+ );
+ DEBUG (
+ (DEBUG_NET,
+ "Far pointer to base-code ROMID = 0x%X\n\r",
+ (UINT32) ((DisplayPointer->Base.Segment << 0x04) | DisplayPointer->Base.Offset))
+ );
+ DEBUG ((DEBUG_NET, "16bit stack segment API entry point. This will be seg:off in \n\r"));
+ DEBUG (
+ (DEBUG_NET,
+ "real mode and sel:off in 16:16 protected mode = 0x%X:0x%X\n\r",
+ DisplayPointer->EntryPointSP.Segment,
+ DisplayPointer->EntryPointSP.Offset)
+ );
+
+ DEBUG ((DEBUG_NET, "\n\tNOTE to the implementer\n\tThis is the entry to use for call-ins\n\r"));
+
+ DEBUG ((DEBUG_NET, "32bit stack Segment API entry point. This will be sel:off. \n\r"));
+ DEBUG (
+ (DEBUG_NET,
+ "In real mode, sel == 0 = 0x%X:0x%X\n\r",
+ DisplayPointer->EntryPointESP.Segment,
+ DisplayPointer->EntryPointESP.Offset)
+ );
+ DEBUG (
+ (DEBUG_NET,
+ "Reserved2 value, must be zero, is equal to 0x%X\n\r",
+ DisplayPointer->Reserved2)
+ );
+ DEBUG (
+ (DEBUG_NET,
+ "Number of segment descriptors in this structur = 0x%X\n\r",
+ (UINT8) DisplayPointer->SegDescCnt)
+ );
+ DEBUG (
+ (DEBUG_NET,
+ "First segment descriptor in GDT assigned to PXE = 0x%X\n\r",
+ (UINT16) DisplayPointer->FirstSelector)
+ );
+ DEBUG (
+ (DEBUG_NET,
+ "The Stack is \n\r\tSegment Addr = 0x%X\n\r\tPhysical Addr = 0x%X\n\r\tSeg Size = 0x%X\n\r",
+ (UINT16) DisplayPointer->Stack.Seg_Addr,
+ (UINT32) DisplayPointer->Stack.Phy_Addr,
+ (UINT16) DisplayPointer->Stack.Seg_Size)
+ );
+ DEBUG (
+ (DEBUG_NET,
+ "The UNDIData is \n\r\tSegment Addr = 0x%X\n\r\tPhysical Addr = 0x%X\n\r\tSeg Size = 0x%X\n\r",
+ (UINT16) DisplayPointer->UNDIData.Seg_Addr,
+ (UINT32) DisplayPointer->UNDIData.Phy_Addr,
+ (UINT16) DisplayPointer->UNDIData.Seg_Size)
+ );
+ DEBUG (
+ (DEBUG_NET,
+ "The UNDICodeWrite is \n\r\tSegment Addr = 0x%X\n\r\tPhysical Addr = 0x%X\n\r\tSeg Size = 0x%X\n\r",
+ (UINT16) DisplayPointer->UNDICode.Seg_Addr,
+ (UINT32) DisplayPointer->UNDICode.Phy_Addr,
+ (UINT16) DisplayPointer->UNDICode.Seg_Size)
+ );
+ DEBUG (
+ (DEBUG_NET,
+ "The Stack is \n\r\tSegment Addr = 0x%X\n\r\tPhysical Addr = 0x%X\n\r\tSeg Size = 0x%X\n\r",
+ (UINT16) DisplayPointer->UNDICodeWrite.Seg_Addr,
+ (UINT32) DisplayPointer->UNDICodeWrite.Phy_Addr,
+ (UINT16) DisplayPointer->UNDICodeWrite.Seg_Size)
+ );
+ DEBUG (
+ (DEBUG_NET,
+ "The BC_Data is \n\r\tSegment Addr = 0x%X\n\r\tPhysical Addr = 0x%X\n\r\tSeg Size = 0x%X\n\r",
+ (UINT16) DisplayPointer->BC_Data.Seg_Addr,
+ (UINT32) DisplayPointer->BC_Data.Phy_Addr,
+ (UINT16) DisplayPointer->BC_Data.Seg_Size)
+ );
+ DEBUG (
+ (DEBUG_NET,
+ "The BC_Code is \n\r\tSegment Addr = 0x%X\n\r\tPhysical Addr = 0x%X\n\r\tSeg Size = 0x%X\n\r",
+ (UINT16) DisplayPointer->BC_Code.Seg_Addr,
+ (UINT32) DisplayPointer->BC_Code.Phy_Addr,
+ (UINT16) DisplayPointer->BC_Code.Seg_Size)
+ );
+ DEBUG (
+ (DEBUG_NET,
+ "The BC_CodeWrite is \n\r\tSegment Addr = 0x%X\n\r\tPhysical Addr = 0x%X\n\r\tSeg Size = 0x%X\n\r",
+ (UINT16) DisplayPointer->BC_CodeWrite.Seg_Addr,
+ (UINT32) DisplayPointer->BC_CodeWrite.Phy_Addr,
+ (UINT16) DisplayPointer->BC_CodeWrite.Seg_Size)
+ );
+}
+
+/**
+ Print PXENV table.
+
+ @param PxenvTable Point to PXENV
+
+**/
+VOID
+Print_PXENV_Table (
+ IN VOID *PxenvTable
+ )
+{
+ PXENV_T *DisplayPointer;
+
+ DisplayPointer = (PXENV_T *) PxenvTable;
+
+ DEBUG (
+ (DEBUG_NET,
+ "\n\rPXENV+ %c%c%c%c%c%c\n\r",
+ DisplayPointer->Signature[0],
+ DisplayPointer->Signature[1],
+ DisplayPointer->Signature[2],
+ DisplayPointer->Signature[3],
+ DisplayPointer->Signature[4],
+ DisplayPointer->Signature[5])
+ );
+
+ DEBUG (
+ (DEBUG_NET,
+ "PXE version number. \n\r\tLSB is minor version. \n\r\tMSB is major version = 0x%X\n\r",
+ DisplayPointer->Version)
+ );
+ DEBUG (
+ (DEBUG_NET,
+ "Length of PXE-2.0 Entry Point structure in bytes = 0x%X\n\r",
+ DisplayPointer->StructLength)
+ );
+ DEBUG ((DEBUG_NET, "Used to make structure checksum equal zero is now = 0x%X\n\r", DisplayPointer->StructCksum));
+ DEBUG ((DEBUG_NET, "Real mode API entry point segment:Offset. = 0x%X\n\r", DisplayPointer->RMEntry));
+ DEBUG ((DEBUG_NET, "Protected mode API entry point = 0x%X\n\r", DisplayPointer->PMEntryOff));
+ DEBUG ((DEBUG_NET, " segment:Offset. This will always be zero. \n\r"));
+ DEBUG ((DEBUG_NET, "Protected mode API calls = 0x%X\n\r", DisplayPointer->PMEntrySeg));
+ DEBUG ((DEBUG_NET, "Real mode stack segment = 0x%X\n\r", DisplayPointer->StackSeg));
+ DEBUG ((DEBUG_NET, "Stack segment size in bytes = 0x%X\n\r", DisplayPointer->StackSize));
+ DEBUG ((DEBUG_NET, "Real mode base-code code segment = 0x%X\n\r", DisplayPointer->BaseCodeSeg));
+ DEBUG ((DEBUG_NET, "Base-code code segment size = 0x%X\n\r", DisplayPointer->BaseCodeSize));
+ DEBUG ((DEBUG_NET, "Real mode base-code data segment = 0x%X\n\r", DisplayPointer->BaseDataSeg));
+ DEBUG ((DEBUG_NET, "Base-code data segment size = 0x%X\n\r", DisplayPointer->BaseDataSize));
+
+ DEBUG (
+ (DEBUG_NET,
+ "UNDI code segment size in bytes = 0x%X\n\r",
+ DisplayPointer->UNDICodeSize)
+ );
+ DEBUG (
+ (DEBUG_NET,
+ "Real mode segment:Offset pointer \n\r\tto PXE Runtime ID structure, address = 0x%X\n\r",
+ DisplayPointer->RuntimePtr)
+ );
+ DEBUG (
+ (
+ DEBUG_NET,
+ "From above, we have a linear address of 0x%X\n\r",
+ (UINT32)
+ (
+ ((UINT32)(UINTN)(DisplayPointer->RuntimePtr) & 0xFFFF) +
+ (((UINT32)(UINTN)(DisplayPointer->RuntimePtr) & 0xFFFF0000) >> 12)
+ )
+ )
+ );
+}
+
+
+#define OPTION_ROM_PTR ((OPTION_ROM_HEADER *) RomAddress)
+
+/**
+ If available, launch the BaseCode from a NIC option ROM.
+ This should install the !PXE and PXENV+ structures in memory for
+ subsequent use.
+
+
+ @param SimpleNetworkDevice Simple network device instance
+ @param RomAddress The ROM base address for NIC rom.
+
+ @retval EFI_NOT_FOUND The check sum does not match
+ @retval EFI_NOT_FOUND Rom ID offset is wrong
+ @retval EFI_NOT_FOUND No Rom ID structure is found
+**/
+EFI_STATUS
+LaunchBaseCode (
+ EFI_SIMPLE_NETWORK_DEV *SimpleNetworkDevice,
+ UINTN RomAddress
+ )
+{
+ EFI_STATUS Status;
+ EFI_IA32_REGISTER_SET InOutRegs;
+ UNDI_ROMID_T *RomIdTableAddress;
+ UNDI_LOADER_T *UndiLoaderTable;
+ UINT16 Segment;
+ UINT16 *StackPointer;
+ VOID *Buffer;
+ UINTN Size;
+ PXE_T *Pxe;
+ UINT32 RomLength;
+ UINTN PciSegment;
+ UINTN Bus;
+ UINTN Device;
+ UINTN Function;
+ BOOLEAN ThunkFailed;
+
+ DEBUG ((DEBUG_NET, "\n\r\n\rCheck for the UNDI ROMID Signature\n\r"));
+
+ //
+ // paranoia - check structures for validity
+ //
+ RomLength = OPTION_ROM_PTR->ROMlength << 9;
+ if (CalculateSum8 ((UINT8 *) RomAddress, RomLength) != 0) {
+ DEBUG ((DEBUG_ERROR, "ROM Header Checksum Error\n\r"));
+ return EFI_NOT_FOUND;
+ }
+
+ RomIdTableAddress = (UNDI_ROMID_T *) (RomAddress + OPTION_ROM_PTR->PxeRomIdOffset);
+
+ if ((UINTN) (OPTION_ROM_PTR->PxeRomIdOffset + RomIdTableAddress->StructLength) > RomLength) {
+ DEBUG ((DEBUG_ERROR, "ROM ID Offset Error\n\r"));
+ return EFI_NOT_FOUND;
+ }
+ //
+ // see if this is a header for an UNDI ROM ID structure (vs. a $BC$ or BUSD type)
+ //
+ if (CompareMem (RomIdTableAddress->Signature, UNDI_ROMID_SIG, sizeof RomIdTableAddress->Signature) != 0) {
+ DEBUG ((DEBUG_ERROR, "No ROM ID Structure found....\n\r"));
+ return EFI_NOT_FOUND;
+ //
+ // its not - keep looking
+ //
+ }
+
+ if (CalculateSum8 ((UINT8 *) RomIdTableAddress, RomIdTableAddress->StructLength) != 0) {
+ DEBUG ((DEBUG_ERROR, "ROM ID Checksum Error\n\r"));
+ return EFI_NOT_FOUND;
+ }
+
+ Print_ROMID_Table (RomIdTableAddress);
+
+ DEBUG (
+ (DEBUG_NET,
+ "The ROM ID is located at 0x%X\n\r",
+ RomIdTableAddress)
+ );
+
+ DEBUG (
+ (DEBUG_NET,
+ "With an UNDI Loader located at 0x%X\n\r",
+ RomAddress + RomIdTableAddress->UNDI_Loader)
+ );
+
+ //
+ // found an UNDI ROM ID structure
+ //
+ SimpleNetworkDevice->Nii.ImageAddr = RomAddress;
+ SimpleNetworkDevice->Nii.ImageSize = RomLength;
+ SimpleNetworkDevice->Nii.MajorVer = RomIdTableAddress->UNDI_Rev[2];
+ SimpleNetworkDevice->Nii.MinorVer = RomIdTableAddress->UNDI_Rev[1];
+
+ DEBUG ((DEBUG_NET, "Allocate area for the UNDI_LOADER_T structure\n\r"));
+ //
+ // Allocate 1 page below 1MB to put real mode thunk code in
+ //
+ // Undi Loader Table is a PXE Specification prescribed data structure
+ // that is used to transfer information into and out of the Undi layer.
+ // Note how it must be located below 1 MB.
+ //
+ SimpleNetworkDevice->UndiLoaderTablePages = EFI_SIZE_TO_PAGES (PARAGRAPH_SIZE + sizeof (UNDI_LOADER_T));
+ Status = BiosSnp16AllocatePagesBelowOneMb (
+ SimpleNetworkDevice->UndiLoaderTablePages,
+ &SimpleNetworkDevice->UndiLoaderTable
+ );
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR, "We had a failure in AllocatePages, status code = 0x%X\n", Status));
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ UndiLoaderTable = SimpleNetworkDevice->UndiLoaderTable;
+
+ DEBUG ((DEBUG_NET, "Allocate area for the real-mode stack whose sole purpose\n\r"));
+ DEBUG ((DEBUG_NET, "in life right now is to store a SEG:OFFSET combo pair that\n\r"));
+ DEBUG ((DEBUG_NET, "points to an Undi_Loader_t table structure\n\r"));
+
+ Size = 0x100;
+ Status = gBS->AllocatePool (EfiLoaderData, Size, &Buffer);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ //
+ // Now we want to put a pointer to the Under Loader Table in our MemPage
+ // Buffer. This will be the argument stack for the call into the Undi Loader
+ //
+ StackPointer = (UINT16 *) Buffer;
+ *StackPointer++ = TO_OFFSET (UndiLoaderTable);
+ //
+ // push the OFFSET
+ //
+ *StackPointer++ = TO_SEGMENT (UndiLoaderTable);
+ //
+ // push the SEGMENT
+ //
+ StackPointer = (UINT16 *) Buffer;
+ //
+ // reset the stack pointer
+ //
+ DEBUG (
+ (DEBUG_NET,
+ "After the fixups, the stack pointer is 0x%X\n\r",
+ (UINT64)(UINTN) StackPointer)
+ );
+
+ //
+ // Allocate memory for the Deployed UNDI.
+ // The UNDI is essentially telling us how much space it needs, and
+ // it is up to the EFI driver to allocate sufficient, boot-time
+ // persistent resources for the call
+ //
+ SimpleNetworkDevice->DestinationDataSegmentPages = EFI_SIZE_TO_PAGES (RomIdTableAddress->DataSize);
+ Status = BiosSnp16AllocatePagesBelowOneMb (
+ SimpleNetworkDevice->DestinationDataSegmentPages,
+ &SimpleNetworkDevice->DestinationDataSegment
+ );
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR, "We had a failure in AllocatePages, status code = 0x%X\n", Status));
+ return Status;
+ }
+
+ UndiLoaderTable->Undi_Ds = (UINT16) ((UINTN) SimpleNetworkDevice->DestinationDataSegment >> 4);
+
+ //
+ // Allocate memory for the Deployed UNDI stack
+ // The UNDI is essentially telling us how much space it needs, and
+ // it is up to the EFI driver to allocate sufficient, boot-time
+ // persistent resources for the call
+ //
+ SimpleNetworkDevice->DestinationStackSegmentPages = EFI_SIZE_TO_PAGES (RomIdTableAddress->StackSize);
+ Status = BiosSnp16AllocatePagesBelowOneMb (
+ SimpleNetworkDevice->DestinationStackSegmentPages,
+ &SimpleNetworkDevice->DestinationStackSegment
+ );
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR, "We had a failure in AllocatePages, status code = 0x%X\n", Status));
+ return Status;
+ }
+ //
+ // Allocate memory for the Deployed UNDI.
+ // The UNDI is essentially telling us how much space it needs, and
+ // it is up to the EFI driver to allocate sufficient, boot-time
+ // persistent resources for the call
+ //
+ SimpleNetworkDevice->DestinationCodeSegmentPages = EFI_SIZE_TO_PAGES (RomIdTableAddress->CodeSize);
+ Status = BiosSnp16AllocatePagesBelowOneMb (
+ SimpleNetworkDevice->DestinationCodeSegmentPages,
+ &SimpleNetworkDevice->DestinationCodeSegment
+ );
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR, "We had a failure in AllocatePages, status code = 0x%X\n", Status));
+ return Status;
+ }
+
+ UndiLoaderTable->Undi_Cs = (UINT16) ((UINTN) SimpleNetworkDevice->DestinationCodeSegment >> 4);
+
+ //
+ // these are in the Input and Output Parameter to be sent to the UNDI Loader code
+ //
+ UndiLoaderTable->Status = 0xAA55;
+ //
+ // -------------------- Changed by Michael_Huang@3Com.com -----------------
+ // UndiLoaderTable->_AX is AX value when UNDI ROM is initialized by BIOS, it is the PCI bus device
+ // function of the NIC. Please refer to PXE Spec for detail info.
+ // old code is:
+ // UndiLoaderTable->Ax = 0x0;
+ // -----------------------------------------------------------------------
+ //
+ SimpleNetworkDevice->PciIo->GetLocation (
+ SimpleNetworkDevice->PciIo,
+ &PciSegment,
+ &Bus,
+ &Device,
+ &Function
+ );
+ UndiLoaderTable->Ax = (UINT16) ((Bus << 0x8) | (Device << 0x3) | (Function));
+ UndiLoaderTable->Bx = 0x0;
+ UndiLoaderTable->Dx = 0x0;
+ UndiLoaderTable->Di = 0x0;
+ UndiLoaderTable->Es = 0x0;
+
+ //
+ // set these OUT values to zero in order to ensure that
+ // uninitialized memory is not mistaken for display data
+ //
+ UndiLoaderTable->PXEptr.Offset = 0;
+ UndiLoaderTable->PXEptr.Segment = 0;
+ UndiLoaderTable->PXENVptr.Segment = 0;
+ UndiLoaderTable->PXENVptr.Offset = 0;
+
+ DEBUG (
+ (DEBUG_INIT,
+ "The NIC is located at Bus 0x%X, Device 0x%X, Function 0x%X\n\r",
+ Bus,
+ Device,
+ Function)
+ );
+
+ //
+ // These are the values that set up the ACTUAL IA32 machine state, whether in
+ // Real16 in EFI32 or the IVE for IA64
+ // register values are unused except for CS:IP and SS:SP
+ //
+ InOutRegs.X.AX = 0;
+ InOutRegs.X.BX = 0;
+ InOutRegs.X.CX = 0;
+ InOutRegs.X.DX = 0;
+ InOutRegs.X.SI = 0;
+ InOutRegs.X.DI = 0;
+ InOutRegs.X.BP = 0;
+ InOutRegs.X.DS = 0;
+ InOutRegs.X.ES = 0;
+ //
+ // just to be clean
+ //
+ DEBUG ((DEBUG_NET, "The way this game works is that the SS:SP +4 should point\n\r"));
+ DEBUG ((DEBUG_NET, "to the contents of the UndiLoaderTable\n\r"));
+ DEBUG (
+ (DEBUG_NET,
+ "The Undi Loader Table is at address = 0x%X\n\r",
+ (UINT32)(UINTN) UndiLoaderTable)
+ );
+ DEBUG (
+ (DEBUG_NET,
+ "The segment and offsets are 0x%X and 0x%X, resp\n",
+ TO_SEGMENT (UndiLoaderTable),
+ TO_OFFSET (UndiLoaderTable))
+ );
+
+ DEBUG (
+ (DEBUG_NET,
+ "The Linear Address of the UNDI Loader entry is 0x%X\n",
+ RomAddress + RomIdTableAddress->UNDI_Loader)
+ );
+
+ DEBUG (
+ (DEBUG_NET,
+ "The Address offset of the UNDI Loader entry is 0x%X\n",
+ RomIdTableAddress->UNDI_Loader)
+ );
+
+ DEBUG ((DEBUG_NET, "Before the call, we have...\n\r"));
+ Print_Undi_Loader_Table (UndiLoaderTable);
+
+ Segment = ((UINT16) (RShiftU64 (RomAddress, 4) & 0xFFFF));
+ DEBUG ((DEBUG_NET, "The Segment of the call is 0x%X\n\r", Segment));
+
+ //
+ // make the call into the UNDI Code
+ //
+ DEBUG ((DEBUG_INIT, "Make the call into the UNDI code now\n\r"));
+
+ DEBUG ((DEBUG_NET, "\nThe 20-BIt address of the Call, and the location \n\r"));
+ DEBUG ((DEBUG_NET, "\twhere we should be able to set a breakpoint is \n\r"));
+ DEBUG (
+ (DEBUG_NET,
+ "\t\t0x%X, from SEG:OFF 0x%X:0x%X\n\r\n\r",
+ Segment * 0x10 + RomIdTableAddress->UNDI_Loader,
+ Segment,
+ RomIdTableAddress->UNDI_Loader)
+ );
+
+ ThunkFailed = SimpleNetworkDevice->LegacyBios->FarCall86 (
+ SimpleNetworkDevice->LegacyBios,
+ Segment, // Input segment
+ (UINT16) RomIdTableAddress->UNDI_Loader, // Offset
+ &InOutRegs, // Ptr to Regs
+ Buffer, // Reference to Stack
+ Size // Size of the Stack
+ );
+ if (ThunkFailed) {
+ return EFI_ABORTED;
+ }
+
+ DEBUG (
+ (DEBUG_NET,
+ "The return code UndiLoaderTable->Status is = 0x%X\n\r",
+ UndiLoaderTable->Status)
+ );
+ DEBUG (
+ (DEBUG_NET,
+ "This error code should match eax, which is = 0x%X\n\r",
+ InOutRegs.X.AX)
+ );
+
+ DEBUG ((DEBUG_NET, "Now returned from the UNDI code\n\r"));
+
+ DEBUG ((DEBUG_NET, "After the call, we have...\n\r"));
+ Print_Undi_Loader_Table (UndiLoaderTable);
+
+ DEBUG ((DEBUG_NET, "Display the PXENV+ and !PXE tables exported by NIC\n\r"));
+ Print_PXENV_Table ((VOID *)(UINTN)((UndiLoaderTable->PXENVptr.Segment << 4) | UndiLoaderTable->PXENVptr.Offset));
+ Print_PXE_Table ((VOID *)(UINTN)((UndiLoaderTable->PXEptr.Segment << 4) + UndiLoaderTable->PXEptr.Offset));
+
+ Pxe = (PXE_T *)(UINTN)((UndiLoaderTable->PXEptr.Segment << 4) + UndiLoaderTable->PXEptr.Offset);
+ SimpleNetworkDevice->Nii.Id = (UINT64)(UINTN) Pxe;
+
+ //
+ // FreePool (Buffer);
+ // paranoia - make sure a valid !PXE structure
+ //
+ if (CompareMem (Pxe->Signature, PXE_SIG, sizeof Pxe->Signature) != 0) {
+ DEBUG ((DEBUG_ERROR, "!PXE Structure not found....\n\r"));
+ return EFI_NOT_FOUND;
+ //
+ // its not - keep looking
+ //
+ }
+
+ if (CalculateSum8 ((UINT8 *) Pxe, Pxe->StructLength) != 0) {
+ DEBUG ((DEBUG_ERROR, "!PXE Checksum Error\n\r"));
+ return EFI_NOT_FOUND;
+ }
+
+ if (Pxe->StructLength < (UINT8 *) &Pxe->FirstSelector - (UINT8 *) Pxe->Signature) {
+ DEBUG ((DEBUG_ERROR, "!PXE Length Error\n\r"));
+ return EFI_NOT_FOUND;
+ }
+
+ if ((((UINTN) Pxe->Undi.Segment) << 4) + Pxe->Undi.Offset != (UINTN) RomIdTableAddress) {
+ DEBUG ((DEBUG_ERROR, "!PXE RomId Address Error\n\r"));
+ return EFI_NOT_FOUND;
+ }
+ //
+ // This is the magic to bind the global PXE interface
+ // This dirtiness is for non-protocol shrouded access
+ //
+ SimpleNetworkDevice->PxeEntrySegment = Pxe->EntryPointSP.Segment;
+
+ if (SimpleNetworkDevice->PxeEntrySegment == 0) {
+ DEBUG ((DEBUG_ERROR, "!PXE EntryPointSP segment Error\n\r"));
+ return EFI_NOT_FOUND;
+ }
+
+ SimpleNetworkDevice->PxeEntryOffset = Pxe->EntryPointSP.Offset;
+
+ DEBUG (
+ (
+ DEBUG_NET, "The entry point is 0x%X:0x%X\n\r", SimpleNetworkDevice->PxeEntrySegment, SimpleNetworkDevice->
+ PxeEntryOffset
+ )
+ );
+
+ return EFI_SUCCESS;
+}
+
+/**
+ Effect the Far Call into the PXE Layer
+
+ Note: When using a 32-bit stack segment do not push 32-bit words onto the stack. The PXE API
+ services will not work, unless there are three 16-bit parameters pushed onto the stack.
+ push DS ;Far pointer to parameter structure
+ push offset pxe_data_call_struct ;is pushed onto stack.
+ push Index ;UINT16 is pushed onto stack.
+ call dword ptr (s_PXE ptr es:[di]).EntryPointSP
+ add sp, 6 ;Caller cleans up stack.
+
+ @param SimpleNetworkDevice Device instance for simple network
+ @param Table Point to parameter/retun value table for legacy far call
+ @param TableSize The size of paramter/return value table
+ @param CallIndex The index of legacy call.
+
+ @return EFI_STATUS
+**/
+EFI_STATUS
+MakePxeCall (
+ EFI_SIMPLE_NETWORK_DEV *SimpleNetworkDevice,
+ IN OUT VOID *Table,
+ IN UINTN TableSize,
+ IN UINT16 CallIndex
+ )
+{
+ EFI_STATUS Status;
+ EFI_IA32_REGISTER_SET InOutRegs;
+ UINT16 *BPtr;
+ VOID *Buffer;
+ UINTN Size;
+ VOID *MemPageAddress;
+ UINTN Index;
+ BOOLEAN ThunkFailed;
+
+ DEBUG ((DEBUG_NET, "MakePxeCall(CallIndex = %02x, Table = %X, TableSize = %d)\n", CallIndex, Table, TableSize));
+
+ if (SimpleNetworkDevice->PxeEntrySegment == 0 && SimpleNetworkDevice->PxeEntryOffset == 0) {
+ return EFI_DEVICE_ERROR;
+ }
+
+ Status = EFI_SUCCESS;
+
+ //
+ // Allocate a transient data structure for the argument table
+ // This table needs to have the input XXX_t structure copied into here.
+ // The PXE UNDI can only grab this table when it's below one-MB, and
+ // this implementation will not try to push this table on the stack
+ // (although this is a possible optimization path since EFI always allocates
+ // 4K as a minimum page size...............)
+ //
+ Status = BiosSnp16AllocatePagesBelowOneMb (
+ TableSize / EFI_PAGE_SIZE + 1,
+ &MemPageAddress
+ );
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR, "We had a failure in AllocatePages, status code = 0x%X\n", Status));
+ return Status;
+ }
+ //
+ // Copy the > 1MB pool table to a sub-1MB buffer
+ //
+ CopyMem (MemPageAddress, Table, TableSize);
+
+ //
+ // Allocate space for IA-32 register context
+ //
+ ZeroMem (&InOutRegs, sizeof (InOutRegs));
+ InOutRegs.X.ES = SimpleNetworkDevice->PxeEntrySegment;
+ InOutRegs.X.DI = SimpleNetworkDevice->PxeEntryOffset;
+
+ //
+ // The game here is to build the stack which will subsequently
+ // get copied down below 1 MB by the FarCall primitive.
+ // This is now our working stack
+ //
+ Size = 6;
+ Status = gBS->AllocatePool (
+ EfiRuntimeServicesData,
+ Size,
+ &Buffer
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ BPtr = (UINT16 *) Buffer;
+ *BPtr++ = CallIndex;
+ //
+ // SP + 2
+ //
+ *BPtr++ = TO_OFFSET (MemPageAddress);
+ *BPtr++ = TO_SEGMENT (MemPageAddress);
+
+ DEBUG ((DEBUG_NET, "State before FarCall86\n"));
+ DEBUG ((DEBUG_NET, "The Buffer is at 0x%X\n\r", Buffer));
+ BPtr = (UINT16 *) Buffer;
+ DEBUG ((DEBUG_NET, " Buffer = %04X %04X %04X", *BPtr, *(BPtr + 1), *(BPtr + 2)));
+ DEBUG ((DEBUG_NET, " MemPage = "));
+ for (Index = 0; Index < TableSize; Index++) {
+ DEBUG ((DEBUG_NET, " %02x", *((UINT8 *) MemPageAddress + Index)));
+ }
+
+ DEBUG ((DEBUG_NET, "\n"));
+
+ ThunkFailed = SimpleNetworkDevice->LegacyBios->FarCall86 (
+ SimpleNetworkDevice->LegacyBios,
+ SimpleNetworkDevice->PxeEntrySegment, // Input segment
+ SimpleNetworkDevice->PxeEntryOffset,
+ &InOutRegs, // Ptr to Regs
+ Buffer, // Reference to Stack
+ 6 // Size of the Stack
+ );
+ if (ThunkFailed) {
+ return EFI_ABORTED;
+ }
+
+ DEBUG ((DEBUG_NET, "State after FarCall86\n"));
+ DEBUG ((DEBUG_NET, "The Buffer is at 0x%X\n\r", Buffer));
+ BPtr = (UINT16 *) Buffer;
+ DEBUG ((DEBUG_NET, " Buffer = %04X %04X %04X", *BPtr, *(BPtr + 1), *(BPtr + 2)));
+ DEBUG ((DEBUG_NET, " MemPage = "));
+ for (Index = 0; Index < TableSize; Index++) {
+ DEBUG ((DEBUG_NET, " %02x", *((UINT8 *) MemPageAddress + Index)));
+ }
+
+ DEBUG ((DEBUG_NET, "\n"));
+
+ //
+ // Copy the sub 1MB table to > 1MB table
+ //
+ CopyMem (Table, MemPageAddress, TableSize);
+
+ //
+ // For PXE UNDI call, AX contains the return status.
+ // Convert the PXE UNDI Status to EFI_STATUS type
+ //
+ if (InOutRegs.X.AX == PXENV_EXIT_SUCCESS) {
+ Status = EFI_SUCCESS;
+ } else {
+ Status = EFI_DEVICE_ERROR;
+ }
+ //
+ // Clean up house
+ //
+ gBS->FreePool (Buffer);
+ gBS->FreePages ((EFI_PHYSICAL_ADDRESS) (UINTN) MemPageAddress, TableSize / EFI_PAGE_SIZE + 1);
+
+ return Status;
+}
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