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Aiden Park
b24fd2759c
This will fully support PatchCheck.py. - Remove all trailing whitespace - Convert LF to CRLF by default - Update EFI_D_* to DEBUG_* - Re-enable CRLF check in PatchCheck.py Signed-off-by: Aiden Park <aiden.park@intel.com>
151 lines
3.4 KiB
C
151 lines
3.4 KiB
C
/** @file
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Shell command `mtrr` to display current MTRR configuration.
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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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Display current MTRR configuration.
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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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ShellCommandMtrrFunc (
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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 ShellCommandMtrr = {
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L"mtrr",
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L"Display current MTRR configuration",
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&ShellCommandMtrrFunc
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};
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/**
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Get string description of MTRR type.
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@param[in] Type Numeric MTRR type
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@retval Type string
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**/
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STATIC
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CONST CHAR16 *
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EFIAPI
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MtrrTypeToStr (
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IN UINTN Type
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)
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{
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switch (Type) {
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case 0x00:
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return L"Uncacheable";
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case 0x01:
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return L"Write Combining";
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case 0x04:
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return L"Write-Through";
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case 0x05:
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return L"Write-Protected";
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case 0x06:
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return L"Write-Back";
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default:
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return L"Unknown";
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}
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}
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/**
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Display current MTRR configuration.
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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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ShellCommandMtrrFunc (
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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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UINTN Index, BaseMsr, MaskMsr, Type;
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BOOLEAN MtrrEnabled, FixedMtrrEnabled, Valid, Verbose;
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UINT64 DefType, BaseVal, Base, MaskVal, Mask, Range, Limit;
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Verbose = FALSE;
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// Check flags
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for (Index = 0; Index < Argc; Index++) {
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if (StrCmp (Argv[Index], L"-h") == 0) {
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goto usage;
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}
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if (StrCmp (Argv[Index], L"-v") == 0) {
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Verbose = TRUE;
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}
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}
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// Dump IA32_MTRR_DEF_TYPE
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DefType = AsmReadMsr64 (0x2ff);
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MtrrEnabled = ((DefType & (1 << 11)) != 0);
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FixedMtrrEnabled = ((DefType & (1 << 10)) != 0);
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ShellPrint (L"MTRRs..............: %s\n", MtrrEnabled ? L"Enabled" : L"Disabled");
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ShellPrint (L"Fixed MTRRs........: %s\n", FixedMtrrEnabled ? L"Enabled" : L"Disabled");
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ShellPrint (L"Default............: %s\n", MtrrTypeToStr (DefType & 0xff));
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ShellPrint (L"\n");
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//
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// TODO: Dump Fixed Range MTRRs
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//
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// Dump Variable MTRR registers
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ShellPrint (L"Variable MTRRs\n");
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for (Index = 0; Index < 10; Index++) {
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BaseMsr = 0x200 + (Index * 2);
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MaskMsr = BaseMsr + 1;
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BaseVal = AsmReadMsr64 (BaseMsr);
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MaskVal = AsmReadMsr64 (MaskMsr);
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Valid = ((MaskVal & (1 << 11)) != 0);
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if (!Valid) {
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continue;
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}
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Type = BaseVal & 0xff;
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Base = BaseVal & 0xffffff000ull;
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Mask = MaskVal & 0xffffff000ull;
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Range = (~Mask & 0xfffffffffull);
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Limit = Base + Range;
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ShellPrint (L"[0x%09llx-0x%09llx] %s\n", Base, Limit, MtrrTypeToStr (Type));
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if (Verbose) {
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ShellPrint (L" IA32_MTRR_PHYSBASE_%d (0x%x): 0x%016llx\n", Index, BaseMsr, BaseVal);
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ShellPrint (L" IA32_MTRR_PHYSMASK_%d (0x%x): 0x%016llx\n", Index, MaskMsr, MaskVal);
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}
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}
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return EFI_SUCCESS;
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usage:
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ShellPrint (L"Usage: %s [-v]\n", Argv[0]);
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ShellPrint (L"\n"
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L"Flags:\n"
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L" -v Verbose\n");
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return EFI_ABORTED;
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}
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