OvmfPkg/SmbiosPlatformDxe: Add OVMF SMBIOS driver (with Xen support)

Locates Xen SMBIOS data and installs it using the SMBIOS protocol. Signed-off-by: gavinguan Reviewed-by: Andrei Warkentin <andreiw@motorola.com> Signed-off-by: jljusten git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12125 6f19259b-4bc3-4df7-8a09-765794883524
2011-08-13 22:54:37 +00:00
parent d5aff67358
commit fb51181762
10 changed files with 373 additions and 6 deletions
--- a/OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.c
+++ b/OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.c
@@ -0,0 +1,170 @@
+/** @file
+  This driver installs SMBIOS information for OVMF
+
+  Copyright (c) 2011, Bei Guan <gbtju85@gmail.com>
+  Copyright (c) 2011, 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 "SmbiosPlatformDxe.h"
+
+
+/**
+  Validates the SMBIOS entry point structure
+
+  @param  EntryPointStructure  SMBIOS entry point structure
+
+  @retval TRUE   The entry point structure is valid
+  @retval FALSE  The entry point structure is not valid
+
+**/
+BOOLEAN
+IsEntryPointStructureValid (
+  IN SMBIOS_TABLE_ENTRY_POINT  *EntryPointStructure
+  )
+{
+  UINTN                     Index;
+  UINT8                     Length;
+  UINT8                     Checksum;
+  UINT8                     *BytePtr;
+
+  BytePtr = (UINT8*) EntryPointStructure;
+  Length = EntryPointStructure->EntryPointLength;
+  Checksum = 0;
+
+  for (Index = 0; Index < Length; Index++) {
+    Checksum += BytePtr[Index];
+  }
+
+  if (Checksum != 0) {
+    return FALSE;
+  } else {
+    return TRUE;
+  }
+}
+
+
+/**
+  Get SMBIOS record length.
+
+  @param  SmbiosTable   SMBIOS pointer.
+
+**/
+UINTN
+SmbiosTableLength (
+  IN SMBIOS_STRUCTURE_POINTER SmbiosTable
+  )
+{
+  CHAR8  *AChar;
+  UINTN  Length;
+
+  AChar = (CHAR8 *)(SmbiosTable.Raw + SmbiosTable.Hdr->Length);
+
+  //
+  // Each structure shall be terminated by a double-null (SMBIOS spec.7.1)
+  //
+  while ((*AChar != 0) || (*(AChar + 1) != 0)) {
+    AChar ++;
+  }
+  Length = ((UINTN)AChar - (UINTN)SmbiosTable.Raw + 2);
+
+  return Length;
+}
+
+
+/**
+  Install all structures from the given SMBIOS structures block
+
+  @param  Smbios               SMBIOS protocol
+  @param  EntryPointStructure  SMBIOS entry point structures block
+
+**/
+EFI_STATUS
+InstallAllStructures (
+  IN EFI_SMBIOS_PROTOCOL       *Smbios,
+  IN SMBIOS_TABLE_ENTRY_POINT  *EntryPointStructure
+  )
+{
+  EFI_STATUS                Status;
+  SMBIOS_STRUCTURE_POINTER  SmbiosTable;
+  EFI_SMBIOS_HANDLE         SmbiosHandle;
+
+  SmbiosTable.Raw = (UINT8*)(UINTN) EntryPointStructure->TableAddress;
+  if (SmbiosTable.Raw == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  while (SmbiosTable.Hdr->Type != 127) {
+    //
+    // Log the SMBIOS data for this structure
+    //
+    SmbiosHandle = 0;
+    Status = Smbios->Add (
+                       Smbios,
+                       NULL,
+                       &SmbiosHandle,
+                       (EFI_SMBIOS_TABLE_HEADER*) SmbiosTable.Raw
+                       );
+    ASSERT_EFI_ERROR (Status);
+
+    //
+    // Get the next structure address
+    //
+    SmbiosTable.Raw = (UINT8 *)(SmbiosTable.Raw + SmbiosTableLength (SmbiosTable));
+  }
+
+  return EFI_SUCCESS;
+}
+
+
+/**
+  Installs SMBIOS information for OVMF
+
+  @param ImageHandle     Module's image handle
+  @param SystemTable     Pointer of EFI_SYSTEM_TABLE
+
+  @retval EFI_SUCCESS    Smbios data successfully installed
+  @retval Other          Smbios data was not installed
+
+**/
+EFI_STATUS
+EFIAPI
+SmbiosTablePublishEntry (
+  IN EFI_HANDLE           ImageHandle,
+  IN EFI_SYSTEM_TABLE     *SystemTable
+  )
+{
+  EFI_STATUS                Status;
+  EFI_SMBIOS_PROTOCOL       *Smbios;
+  SMBIOS_TABLE_ENTRY_POINT  *EntryPointStructure;
+
+  //
+  // Find the SMBIOS protocol
+  //
+  Status = gBS->LocateProtocol (
+                  &gEfiSmbiosProtocolGuid,
+                  NULL,
+                  (VOID**)&Smbios
+                  );
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  //
+  // Add Xen SMBIOS data if found
+  //
+  EntryPointStructure = GetXenSmbiosTables ();
+  if (EntryPointStructure != NULL) {
+    Status = InstallAllStructures (Smbios, EntryPointStructure);
+  }
+
+  return Status;
+}