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Maurice Ma
71 lines
1.5 KiB
C
71 lines
1.5 KiB
C
/** @file
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Shell command `ucode` to display the loaded microcode patch version.
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Copyright (c) 2017, 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 of the BSD License
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which accompanies this distribution. The 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 <Library/ShellLib.h>
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/**
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Display microcode version.
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@param[in] Shell shell instance
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@param[in] Argc number of command line arguments
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@param[in] Argv command line arguments
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@retval EFI_SUCCESS
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**/
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STATIC
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EFI_STATUS
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EFIAPI
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ShellCommandUcodeFunc (
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IN SHELL *Shell,
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IN UINTN Argc,
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IN CHAR16 *Argv[]
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);
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CONST SHELL_COMMAND ShellCommandUcode = {
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L"ucode",
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L"Display microcode version",
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&ShellCommandUcodeFunc
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};
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/**
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Display microcode version.
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@param[in] Shell shell instance
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@param[in] Argc number of command line arguments
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@param[in] Argv command line arguments
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@retval EFI_SUCCESS
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**/
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STATIC
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EFI_STATUS
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EFIAPI
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ShellCommandUcodeFunc (
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IN SHELL *Shell,
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IN UINTN Argc,
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IN CHAR16 *Argv[]
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)
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{
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UINT64 Value;
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AsmWriteMsr64 (0x8b, 0LL);
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AsmCpuid (0, NULL, NULL, NULL, NULL);
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Value = AsmReadMsr64 (0x8b);
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ShellPrint (L"IA32_BIOS_SIGN_ID: 0x%llx\n", Value);
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return EFI_SUCCESS;
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}
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