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Guo Dong
5e10bd1e07
To align with EDK2, update file license to use BSD+Patent license Signed-off-by: Guo Dong <guo.dong@intel.com>
83 lines
1.5 KiB
C
83 lines
1.5 KiB
C
/** @file
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Shell command `msr` to read/write model-specific registers.
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Copyright (c) 2017, 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/ShellLib.h>
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/**
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Read or write model specific registers.
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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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ShellCommandMsrFunc (
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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 ShellCommandMsr = {
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L"msr",
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L"Read or write model specific registers",
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&ShellCommandMsrFunc
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};
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/**
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Read or write model specific registers.
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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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ShellCommandMsrFunc (
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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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BOOLEAN Write;
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UINTN Addr;
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UINT64 Value;
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if (Argc == 2) {
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Write = FALSE;
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} else if (Argc == 3) {
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Write = TRUE;
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Value = StrHexToUint64 (Argv[2]);
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} else {
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goto usage;
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}
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Addr = StrHexToUintn (Argv[1]);
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if (Write) {
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AsmWriteMsr64 (Addr, Value);
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} else {
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Value = AsmReadMsr64 (Addr);
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ShellPrint (L"0x%x: 0x%llx\n", Addr, Value);
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}
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return EFI_SUCCESS;
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usage:
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ShellPrint (L"Usage: %s <addr> [<value>]\n", Argv[0]);
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return EFI_ABORTED;
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}
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