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system76-edk2/ShellPkg/Library/UefiShellAcpiViewCommandLib/Parsers/Fadt/FadtParser.c
Krzysztof Koch 54d33a5314 ShellPkg: acpiview: FADT: Validate global pointer before use 
Check if global pointers have been successfully updated before they
are used for further table parsing.

Signed-off-by: Krzysztof Koch <krzysztof.koch@arm.com>
2020-02-11 02:12:45 +00:00

320 lines
10 KiB
C
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/** @file
FADT table parser
Copyright (c) 2016 - 2020, ARM Limited. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent
@par Reference(s):
- ACPI 6.3 Specification - January 2019
**/
#include <IndustryStandard/Acpi.h>
#include <Library/UefiLib.h>
#include "AcpiParser.h"
#include "AcpiTableParser.h"
#include "AcpiView.h"
// Local variables
STATIC CONST UINT32* DsdtAddress;
STATIC CONST UINT64* X_DsdtAddress;
STATIC CONST UINT32* Flags;
STATIC CONST UINT32* FirmwareCtrl;
STATIC CONST UINT64* X_FirmwareCtrl;
STATIC CONST UINT8* FadtMinorRevision;
STATIC ACPI_DESCRIPTION_HEADER_INFO AcpiHdrInfo;
/**
A macro defining the Hardware reduced ACPI flag
**/
#define HW_REDUCED_ACPI BIT20
/**
Offset to the FACS signature from the start of the FACS.
**/
#define FACS_SIGNATURE_OFFSET 0
/**
Offset to the FACS revision from the start of the FACS.
**/
#define FACS_VERSION_OFFSET 32
/**
Offset to the FACS length from the start of the FACS.
**/
#define FACS_LENGTH_OFFSET 4
/**
Get the ACPI XSDT header info.
**/
CONST ACPI_DESCRIPTION_HEADER_INFO *
EFIAPI
GetAcpiXsdtHeaderInfo (
VOID
);
/**
This function validates the Firmware Control Field.
@param [in] Ptr Pointer to the start of the field data.
@param [in] Context Pointer to context specific information e.g. this
could be a pointer to the ACPI table header.
**/
STATIC
VOID
EFIAPI
ValidateFirmwareCtrl (
IN UINT8* Ptr,
IN VOID* Context
)
{
#if defined (MDE_CPU_ARM) || defined (MDE_CPU_AARCH64)
if (*(UINT32*)Ptr != 0) {
IncrementErrorCount ();
Print (
L"\nERROR: Firmware Control must be zero for ARM platforms."
);
}
#endif
}
/**
This function validates the X_Firmware Control Field.
@param [in] Ptr Pointer to the start of the field data.
@param [in] Context Pointer to context specific information e.g. this
could be a pointer to the ACPI table header.
**/
STATIC
VOID
EFIAPI
ValidateXFirmwareCtrl (
IN UINT8* Ptr,
IN VOID* Context
)
{
#if defined (MDE_CPU_ARM) || defined (MDE_CPU_AARCH64)
if (*(UINT64*)Ptr != 0) {
IncrementErrorCount ();
Print (
L"\nERROR: X Firmware Control must be zero for ARM platforms."
);
}
#endif
}
/**
This function validates the flags.
@param [in] Ptr Pointer to the start of the field data.
@param [in] Context Pointer to context specific information e.g. this
could be a pointer to the ACPI table header.
**/
STATIC
VOID
EFIAPI
ValidateFlags (
IN UINT8* Ptr,
IN VOID* Context
)
{
#if defined (MDE_CPU_ARM) || defined (MDE_CPU_AARCH64)
if (((*(UINT32*)Ptr) & HW_REDUCED_ACPI) == 0) {
IncrementErrorCount ();
Print (
L"\nERROR: HW_REDUCED_ACPI flag must be set for ARM platforms."
);
}
#endif
}
/**
An ACPI_PARSER array describing the ACPI FADT Table.
**/
STATIC CONST ACPI_PARSER FadtParser[] = {
PARSE_ACPI_HEADER (&AcpiHdrInfo),
{L"FIRMWARE_CTRL", 4, 36, L"0x%x", NULL, (VOID**)&FirmwareCtrl,
ValidateFirmwareCtrl, NULL},
{L"DSDT", 4, 40, L"0x%x", NULL, (VOID**)&DsdtAddress, NULL, NULL},
{L"Reserved", 1, 44, L"%x", NULL, NULL, NULL, NULL},
{L"Preferred_PM_Profile", 1, 45, L"0x%x", NULL, NULL, NULL, NULL},
{L"SCI_INT", 2, 46, L"0x%x", NULL, NULL, NULL, NULL},
{L"SMI_CMD", 4, 48, L"0x%x", NULL, NULL, NULL, NULL},
{L"ACPI_ENABLE", 1, 52, L"0x%x", NULL, NULL, NULL, NULL},
{L"ACPI_DISABLE", 1, 53, L"0x%x", NULL, NULL, NULL, NULL},
{L"S4BIOS_REQ", 1, 54, L"0x%x", NULL, NULL, NULL, NULL},
{L"PSTATE_CNT", 1, 55, L"0x%x", NULL, NULL, NULL, NULL},
{L"PM1a_EVT_BLK", 4, 56, L"0x%x", NULL, NULL, NULL, NULL},
{L"PM1b_EVT_BLK", 4, 60, L"0x%x", NULL, NULL, NULL, NULL},
{L"PM1a_CNT_BLK", 4, 64, L"0x%x", NULL, NULL, NULL, NULL},
{L"PM1b_CNT_BLK", 4, 68, L"0x%x", NULL, NULL, NULL, NULL},
{L"PM2_CNT_BLK", 4, 72, L"0x%x", NULL, NULL, NULL, NULL},
{L"PM_TMR_BLK", 4, 76, L"0x%x", NULL, NULL, NULL, NULL},
{L"GPE0_BLK", 4, 80, L"0x%x", NULL, NULL, NULL, NULL},
{L"GPE1_BLK", 4, 84, L"0x%x", NULL, NULL, NULL, NULL},
{L"PM1_EVT_LEN", 1, 88, L"0x%x", NULL, NULL, NULL, NULL},
{L"PM1_CNT_LEN", 1, 89, L"0x%x", NULL, NULL, NULL, NULL},
{L"PM2_CNT_LEN", 1, 90, L"0x%x", NULL, NULL, NULL, NULL},
{L"PM_TMR_LEN", 1, 91, L"0x%x", NULL, NULL, NULL, NULL},
{L"GPE0_BLK_LEN", 1, 92, L"0x%x", NULL, NULL, NULL, NULL},
{L"GPE1_BLK_LEN", 1, 93, L"0x%x", NULL, NULL, NULL, NULL},
{L"GPE1_BASE", 1, 94, L"0x%x", NULL, NULL, NULL, NULL},
{L"CST_CNT", 1, 95, L"0x%x", NULL, NULL, NULL, NULL},
{L"P_LVL2_LAT", 2, 96, L"0x%x", NULL, NULL, NULL, NULL},
{L"P_LVL3_LAT", 2, 98, L"0x%x", NULL, NULL, NULL, NULL},
{L"FLUSH_SIZE", 2, 100, L"0x%x", NULL, NULL, NULL, NULL},
{L"FLUSH_STRIDE", 2, 102, L"0x%x", NULL, NULL, NULL, NULL},
{L"DUTY_OFFSET", 1, 104, L"0x%x", NULL, NULL, NULL, NULL},
{L"DUTY_WIDTH", 1, 105, L"0x%x", NULL, NULL, NULL, NULL},
{L"DAY_ALRM", 1, 106, L"0x%x", NULL, NULL, NULL, NULL},
{L"MON_ALRM", 1, 107, L"0x%x", NULL, NULL, NULL, NULL},
{L"CENTURY", 1, 108, L"0x%x", NULL, NULL, NULL, NULL},
{L"IAPC_BOOT_ARCH", 2, 109, L"0x%x", NULL, NULL, NULL, NULL},
{L"Reserved", 1, 111, L"0x%x", NULL, NULL, NULL, NULL},
{L"Flags", 4, 112, L"0x%x", NULL, (VOID**)&Flags, ValidateFlags, NULL},
{L"RESET_REG", 12, 116, NULL, DumpGas, NULL, NULL, NULL},
{L"RESET_VALUE", 1, 128, L"0x%x", NULL, NULL, NULL, NULL},
{L"ARM_BOOT_ARCH", 2, 129, L"0x%x", NULL, NULL, NULL, NULL},
{L"FADT Minor Version", 1, 131, L"0x%x", NULL, (VOID**)&FadtMinorRevision,
NULL, NULL},
{L"X_FIRMWARE_CTRL", 8, 132, L"0x%lx", NULL, (VOID**)&X_FirmwareCtrl,
ValidateXFirmwareCtrl, NULL},
{L"X_DSDT", 8, 140, L"0x%lx", NULL, (VOID**)&X_DsdtAddress, NULL, NULL},
{L"X_PM1a_EVT_BLK", 12, 148, NULL, DumpGas, NULL, NULL, NULL},
{L"X_PM1b_EVT_BLK", 12, 160, NULL, DumpGas, NULL, NULL, NULL},
{L"X_PM1a_CNT_BLK", 12, 172, NULL, DumpGas, NULL, NULL, NULL},
{L"X_PM1b_CNT_BLK", 12, 184, NULL, DumpGas, NULL, NULL, NULL},
{L"X_PM2_CNT_BLK", 12, 196, NULL, DumpGas, NULL, NULL, NULL},
{L"X_PM_TMR_BLK", 12, 208, NULL, DumpGas, NULL, NULL, NULL},
{L"X_GPE0_BLK", 12, 220, NULL, DumpGas, NULL, NULL, NULL},
{L"X_GPE1_BLK", 12, 232, NULL, DumpGas, NULL, NULL, NULL},
{L"SLEEP_CONTROL_REG", 12, 244, NULL, DumpGas, NULL, NULL, NULL},
{L"SLEEP_STATUS_REG", 12, 256, NULL, DumpGas, NULL, NULL, NULL},
{L"Hypervisor VendorIdentity", 8, 268, L"%lx", NULL, NULL, NULL, NULL}
};
/**
This function parses the ACPI FADT table.
This function parses the FADT table and optionally traces the ACPI table fields.
This function also performs validation of the ACPI table fields.
@param [in] Trace If TRUE, trace the ACPI fields.
@param [in] Ptr Pointer to the start of the buffer.
@param [in] AcpiTableLength Length of the ACPI table.
@param [in] AcpiTableRevision Revision of the ACPI table.
**/
VOID
EFIAPI
ParseAcpiFadt (
IN BOOLEAN Trace,
IN UINT8* Ptr,
IN UINT32 AcpiTableLength,
IN UINT8 AcpiTableRevision
)
{
EFI_STATUS Status;
UINT8* DsdtPtr;
UINT8* FirmwareCtrlPtr;
UINT32 FacsSignature;
UINT32 FacsLength;
UINT8 FacsRevision;
PARSE_ACPI_TABLE_PROC FacsParserProc;
ParseAcpi (
Trace,
0,
"FADT",
Ptr,
AcpiTableLength,
PARSER_PARAMS (FadtParser)
);
if (Trace) {
if (FadtMinorRevision != NULL) {
Print (L"\nSummary:\n");
PrintFieldName (2, L"FADT Version");
Print (L"%d.%d\n", *AcpiHdrInfo.Revision, *FadtMinorRevision);
}
if (*GetAcpiXsdtHeaderInfo ()->OemTableId != *AcpiHdrInfo.OemTableId) {
IncrementErrorCount ();
Print (L"ERROR: OEM Table Id does not match with RSDT/XSDT.\n");
}
}
// If X_FIRMWARE_CTRL is not zero then use X_FIRMWARE_CTRL and ignore
// FIRMWARE_CTRL, else use FIRMWARE_CTRL.
if ((X_FirmwareCtrl != NULL) && (*X_FirmwareCtrl != 0)) {
FirmwareCtrlPtr = (UINT8*)(UINTN)(*X_FirmwareCtrl);
} else if ((FirmwareCtrl != NULL) && (*FirmwareCtrl != 0)) {
FirmwareCtrlPtr = (UINT8*)(UINTN)(*FirmwareCtrl);
} else {
FirmwareCtrlPtr = NULL;
// if HW_REDUCED_ACPI flag is not set, both FIRMWARE_CTRL and
// X_FIRMWARE_CTRL cannot be zero, and the FACS Table must be
// present.
if ((Trace) &&
(Flags != NULL) &&
((*Flags & EFI_ACPI_6_3_HW_REDUCED_ACPI) != EFI_ACPI_6_3_HW_REDUCED_ACPI)) {
IncrementErrorCount ();
Print (L"ERROR: No FACS table found, "
L"both X_FIRMWARE_CTRL and FIRMWARE_CTRL are zero.\n");
}
}
if (FirmwareCtrlPtr != NULL) {
// The FACS table does not have a standard ACPI table header. Therefore,
// the signature, length and version needs to be initially parsed.
// The FACS signature is 4 bytes starting at offset 0.
FacsSignature = *(UINT32*)(FirmwareCtrlPtr + FACS_SIGNATURE_OFFSET);
// The FACS length is 4 bytes starting at offset 4.
FacsLength = *(UINT32*)(FirmwareCtrlPtr + FACS_LENGTH_OFFSET);
// The FACS version is 1 byte starting at offset 32.
FacsRevision = *(UINT8*)(FirmwareCtrlPtr + FACS_VERSION_OFFSET);
Trace = ProcessTableReportOptions (
FacsSignature,
FirmwareCtrlPtr,
FacsLength
);
Status = GetParser (FacsSignature, &FacsParserProc);
if (EFI_ERROR (Status)) {
Print (
L"ERROR: No registered parser found for FACS.\n"
);
return;
}
FacsParserProc (
Trace,
FirmwareCtrlPtr,
FacsLength,
FacsRevision
);
}
// If X_DSDT is valid then use X_DSDT and ignore DSDT, else use DSDT.
if ((X_DsdtAddress != NULL) && (*X_DsdtAddress != 0)) {
DsdtPtr = (UINT8*)(UINTN)(*X_DsdtAddress);
} else if ((DsdtAddress != NULL) && (*DsdtAddress != 0)) {
DsdtPtr = (UINT8*)(UINTN)(*DsdtAddress);
} else {
// Both DSDT and X_DSDT cannot be invalid.
#if defined (MDE_CPU_ARM) || defined (MDE_CPU_AARCH64)
if (Trace) {
// The DSDT Table is mandatory for ARM systems
// as the CPU information MUST be presented in
// the DSDT.
IncrementErrorCount ();
Print (L"ERROR: Both X_DSDT and DSDT are invalid.\n");
}
#endif
return;
}
ProcessAcpiTable (DsdtPtr);
}
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