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Maurice Ma
87 lines
2.0 KiB
C
87 lines
2.0 KiB
C
/** @file
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Shell command `Cpuid` to read CPU specific information.
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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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Read CPU specific information using CPUID instruction.
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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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ShellCommandCpuidFunc (
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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 ShellCommandCpuid = {
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L"cpuid",
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L"Read CPU specific information",
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&ShellCommandCpuidFunc
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};
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/**
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Read CPU specific information using CPUID instruction.
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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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ShellCommandCpuidFunc (
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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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UINT32 Index;
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UINT32 SubIndex;
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UINT32 Eax;
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UINT32 Ebx;
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UINT32 Ecx;
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UINT32 Edx;
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if ((Argc < 2) || (Argc > 3)) {
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ShellPrint (L"Usage: %s <index> [<subindex>]\n", Argv[0]);
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return EFI_ABORTED;
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}
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Index = StrHexToUintn (Argv[1]);
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if (Argc == 3) {
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SubIndex = StrHexToUintn (Argv[2]);
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} else {
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SubIndex = 0;
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}
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AsmCpuidEx (Index, SubIndex, &Eax, &Ebx, &Ecx, &Edx);
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ShellPrint (L"cpuid (eax=0x%x, ecx=0x%x):\n", Index, SubIndex);
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ShellPrint (L" eax=0x%08X, ebx=0x%08X, ecx=0x%08X, edx=0x%08X\n", Eax, Ebx, Ecx, Edx);
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return EFI_SUCCESS;
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}
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