a8ab14424e
Move the declaration of the GetXenSmbiosTables() function to a new header file called "XenSmbiosPlatformDxe.h". (The only declaration that remains in "SmbiosPlatformDxe.h" for now is that of GetQemuSmbiosTables().) Modify the pattern in "Maintainers.txt" so that the new file be covered in the "OvmfPkg: Xen-related modules" section. This patch is best viewed with "git show --no-renames". Cc: Andrew Fish <afish@apple.com> Cc: Anthony Perard <anthony.perard@citrix.com> Cc: Ard Biesheuvel <ardb+tianocore@kernel.org> Cc: Jordan Justen <jordan.l.justen@intel.com> Cc: Julien Grall <julien@xen.org> Cc: Leif Lindholm <leif@nuviainc.com> Cc: Michael D Kinney <michael.d.kinney@intel.com> Cc: Philippe Mathieu-Daudé <philmd@redhat.com> Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=2122 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Message-Id: <20210526201446.12554-40-lersek@redhat.com> Reviewed-by: Ard Biesheuvel <ardb@kernel.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Leif Lindholm <leif@nuviainc.com>
95 lines
2.4 KiB
C
95 lines
2.4 KiB
C
/** @file
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Detect Xen hvmloader SMBIOS data for usage by OVMF.
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Copyright (c) 2011, Bei Guan <gbtju85@gmail.com>
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Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Library/BaseLib.h> // AsciiStrnCmp()
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#include <Library/HobLib.h> // GetFirstGuidHob()
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#include <Pi/PiHob.h> // EFI_HOB_GUID_TYPE
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#include "XenSmbiosPlatformDxe.h"
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#define XEN_SMBIOS_PHYSICAL_ADDRESS 0x000EB000
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#define XEN_SMBIOS_PHYSICAL_END 0x000F0000
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/**
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Validates the SMBIOS entry point structure
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@param EntryPointStructure SMBIOS entry point structure
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@retval TRUE The entry point structure is valid
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@retval FALSE The entry point structure is not valid
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**/
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STATIC
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BOOLEAN
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IsEntryPointStructureValid (
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IN SMBIOS_TABLE_ENTRY_POINT *EntryPointStructure
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)
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{
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UINTN Index;
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UINT8 Length;
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UINT8 Checksum;
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UINT8 *BytePtr;
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BytePtr = (UINT8*) EntryPointStructure;
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Length = EntryPointStructure->EntryPointLength;
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Checksum = 0;
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for (Index = 0; Index < Length; Index++) {
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Checksum = Checksum + (UINT8) BytePtr[Index];
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}
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if (Checksum != 0) {
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return FALSE;
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} else {
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return TRUE;
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}
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}
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/**
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Locates the Xen SMBIOS data if it exists
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@return SMBIOS_TABLE_ENTRY_POINT Address of Xen SMBIOS data
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**/
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SMBIOS_TABLE_ENTRY_POINT *
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GetXenSmbiosTables (
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VOID
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)
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{
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UINT8 *XenSmbiosPtr;
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SMBIOS_TABLE_ENTRY_POINT *XenSmbiosEntryPointStructure;
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EFI_HOB_GUID_TYPE *GuidHob;
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//
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// See if a XenInfo HOB is available
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//
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GuidHob = GetFirstGuidHob (&gEfiXenInfoGuid);
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if (GuidHob == NULL) {
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return NULL;
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}
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for (XenSmbiosPtr = (UINT8*)(UINTN) XEN_SMBIOS_PHYSICAL_ADDRESS;
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XenSmbiosPtr < (UINT8*)(UINTN) XEN_SMBIOS_PHYSICAL_END;
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XenSmbiosPtr += 0x10) {
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XenSmbiosEntryPointStructure = (SMBIOS_TABLE_ENTRY_POINT *) XenSmbiosPtr;
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if (!AsciiStrnCmp ((CHAR8 *) XenSmbiosEntryPointStructure->AnchorString, "_SM_", 4) &&
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!AsciiStrnCmp ((CHAR8 *) XenSmbiosEntryPointStructure->IntermediateAnchorString, "_DMI_", 5) &&
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IsEntryPointStructureValid (XenSmbiosEntryPointStructure)) {
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return XenSmbiosEntryPointStructure;
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}
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}
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return NULL;
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}
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