mirror of https://github.com/acidanthera/audk.git
326 lines
9.3 KiB
C
326 lines
9.3 KiB
C
/** @file
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GTDT table parser
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Copyright (c) 2016 - 2019, ARM Limited. All rights reserved.
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SPDX-License-Identifier: BSD-2-Clause-Patent
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@par Reference(s):
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- ACPI 6.3 Specification - January 2019
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**/
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#include <IndustryStandard/Acpi.h>
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#include <Library/UefiLib.h>
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#include "AcpiParser.h"
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#include "AcpiTableParser.h"
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// "The number of GT Block Timers must be less than or equal to 8"
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#define GT_BLOCK_TIMER_COUNT_MAX 8
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// Local variables
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STATIC CONST UINT32* GtdtPlatformTimerCount;
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STATIC CONST UINT32* GtdtPlatformTimerOffset;
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STATIC CONST UINT8* PlatformTimerType;
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STATIC CONST UINT16* PlatformTimerLength;
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STATIC CONST UINT32* GtBlockTimerCount;
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STATIC CONST UINT32* GtBlockTimerOffset;
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STATIC ACPI_DESCRIPTION_HEADER_INFO AcpiHdrInfo;
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/**
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This function validates the GT Block timer count.
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@param [in] Ptr Pointer to the start of the field data.
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@param [in] Context Pointer to context specific information e.g. this
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could be a pointer to the ACPI table header.
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**/
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STATIC
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VOID
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EFIAPI
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ValidateGtBlockTimerCount (
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IN UINT8* Ptr,
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IN VOID* Context
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)
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{
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UINT32 BlockTimerCount;
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BlockTimerCount = *(UINT32*)Ptr;
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if (BlockTimerCount > GT_BLOCK_TIMER_COUNT_MAX) {
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IncrementErrorCount ();
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Print (
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L"\nERROR: Timer Count = %d. Max Timer Count is %d.",
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BlockTimerCount,
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GT_BLOCK_TIMER_COUNT_MAX
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);
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}
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}
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/**
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This function validates the GT Frame Number.
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@param [in] Ptr Pointer to the start of the field data.
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@param [in] Context Pointer to context specific information e.g. this
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could be a pointer to the ACPI table header.
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**/
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STATIC
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VOID
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EFIAPI
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ValidateGtFrameNumber (
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IN UINT8* Ptr,
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IN VOID* Context
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)
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{
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UINT8 FrameNumber;
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FrameNumber = *(UINT8*)Ptr;
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if (FrameNumber >= GT_BLOCK_TIMER_COUNT_MAX) {
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IncrementErrorCount ();
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Print (
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L"\nERROR: GT Frame Number = %d. GT Frame Number must be in range 0-%d.",
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FrameNumber,
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GT_BLOCK_TIMER_COUNT_MAX - 1
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);
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}
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}
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/**
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An ACPI_PARSER array describing the ACPI GTDT Table.
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**/
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STATIC CONST ACPI_PARSER GtdtParser[] = {
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PARSE_ACPI_HEADER (&AcpiHdrInfo),
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{L"CntControlBase Physical Address", 8, 36, L"0x%lx", NULL, NULL,
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NULL, NULL},
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{L"Reserved", 4, 44, L"0x%x", NULL, NULL, NULL, NULL},
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{L"Secure EL1 timer GSIV", 4, 48, L"0x%x", NULL, NULL, NULL, NULL},
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{L"Secure EL1 timer FLAGS", 4, 52, L"0x%x", NULL, NULL, NULL, NULL},
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{L"Non-Secure EL1 timer GSIV", 4, 56, L"0x%x", NULL, NULL, NULL, NULL},
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{L"Non-Secure EL1 timer FLAGS", 4, 60, L"0x%x", NULL, NULL, NULL, NULL},
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{L"Virtual timer GSIV", 4, 64, L"0x%x", NULL, NULL, NULL, NULL},
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{L"Virtual timer FLAGS", 4, 68, L"0x%x", NULL, NULL, NULL, NULL},
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{L"Non-Secure EL2 timer GSIV", 4, 72, L"0x%x", NULL, NULL, NULL, NULL},
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{L"Non-Secure EL2 timer FLAGS", 4, 76, L"0x%x", NULL, NULL, NULL, NULL},
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{L"CntReadBase Physical address", 8, 80, L"0x%lx", NULL, NULL, NULL, NULL},
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{L"Platform Timer Count", 4, 88, L"%d", NULL,
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(VOID**)&GtdtPlatformTimerCount, NULL, NULL},
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{L"Platform Timer Offset", 4, 92, L"0x%x", NULL,
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(VOID**)&GtdtPlatformTimerOffset, NULL, NULL},
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{L"Virtual EL2 Timer GSIV", 4, 96, L"0x%x", NULL, NULL, NULL, NULL},
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{L"Virtual EL2 Timer Flags", 4, 100, L"0x%x", NULL, NULL, NULL, NULL}
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};
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/**
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An ACPI_PARSER array describing the Platform timer header.
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**/
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STATIC CONST ACPI_PARSER GtPlatformTimerHeaderParser[] = {
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{L"Type", 1, 0, NULL, NULL, (VOID**)&PlatformTimerType, NULL, NULL},
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{L"Length", 2, 1, NULL, NULL, (VOID**)&PlatformTimerLength, NULL, NULL},
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{L"Reserved", 1, 3, NULL, NULL, NULL, NULL, NULL}
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};
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/**
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An ACPI_PARSER array describing the Platform GT Block.
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**/
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STATIC CONST ACPI_PARSER GtBlockParser[] = {
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{L"Type", 1, 0, L"%d", NULL, NULL, NULL, NULL},
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{L"Length", 2, 1, L"%d", NULL, NULL, NULL, NULL},
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{L"Reserved", 1, 3, L"%x", NULL, NULL, NULL, NULL},
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{L"Physical address (CntCtlBase)", 8, 4, L"0x%lx", NULL, NULL, NULL, NULL},
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{L"Timer Count", 4, 12, L"%d", NULL, (VOID**)&GtBlockTimerCount,
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ValidateGtBlockTimerCount, NULL},
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{L"Timer Offset", 4, 16, L"%d", NULL, (VOID**)&GtBlockTimerOffset, NULL,
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NULL}
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};
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/**
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An ACPI_PARSER array describing the GT Block timer.
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**/
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STATIC CONST ACPI_PARSER GtBlockTimerParser[] = {
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{L"Frame Number", 1, 0, L"%d", NULL, NULL, ValidateGtFrameNumber, NULL},
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{L"Reserved", 3, 1, L"%x %x %x", Dump3Chars, NULL, NULL, NULL},
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{L"Physical address (CntBaseX)", 8, 4, L"0x%lx", NULL, NULL, NULL, NULL},
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{L"Physical address (CntEL0BaseX)", 8, 12, L"0x%lx", NULL, NULL, NULL,
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NULL},
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{L"Physical Timer GSIV", 4, 20, L"0x%x", NULL, NULL, NULL, NULL},
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{L"Physical Timer Flags", 4, 24, L"0x%x", NULL, NULL, NULL, NULL},
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{L"Virtual Timer GSIV", 4, 28, L"0x%x", NULL, NULL, NULL, NULL},
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{L"Virtual Timer Flags", 4, 32, L"0x%x", NULL, NULL, NULL, NULL},
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{L"Common Flags", 4, 36, L"0x%x", NULL, NULL, NULL, NULL}
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};
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/**
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An ACPI_PARSER array describing the Platform Watchdog.
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**/
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STATIC CONST ACPI_PARSER SBSAGenericWatchdogParser[] = {
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{L"Type", 1, 0, L"%d", NULL, NULL, NULL, NULL},
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{L"Length", 2, 1, L"%d", NULL, NULL, NULL, NULL},
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{L"Reserved", 1, 3, L"%x", NULL, NULL, NULL, NULL},
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{L"RefreshFrame Physical address", 8, 4, L"0x%lx", NULL, NULL, NULL, NULL},
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{L"ControlFrame Physical address", 8, 12, L"0x%lx", NULL, NULL, NULL, NULL},
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{L"Watchdog Timer GSIV", 4, 20, L"0x%x", NULL, NULL, NULL, NULL},
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{L"Watchdog Timer Flags", 4, 24, L"0x%x", NULL, NULL, NULL, NULL}
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};
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/**
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This function parses the Platform GT Block.
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@param [in] Ptr Pointer to the start of the GT Block data.
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@param [in] Length Length of the GT Block structure.
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**/
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STATIC
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VOID
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DumpGTBlock (
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IN UINT8* Ptr,
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IN UINT16 Length
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)
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{
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UINT32 Index;
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UINT32 Offset;
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ParseAcpi (
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TRUE,
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2,
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"GT Block",
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Ptr,
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Length,
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PARSER_PARAMS (GtBlockParser)
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);
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Offset = *GtBlockTimerOffset;
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Index = 0;
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// Parse the specified number of GT Block Timer Structures or the GT Block
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// Structure buffer length. Whichever is minimum.
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while ((Index++ < *GtBlockTimerCount) &&
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(Offset < Length)) {
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Offset += ParseAcpi (
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TRUE,
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2,
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"GT Block Timer",
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Ptr + Offset,
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Length - Offset,
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PARSER_PARAMS (GtBlockTimerParser)
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);
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}
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}
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/**
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This function parses the Platform Watchdog timer.
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@param [in] Ptr Pointer to the start of the watchdog timer data.
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@param [in] Length Length of the watchdog timer structure.
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**/
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STATIC
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VOID
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DumpWatchdogTimer (
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IN UINT8* Ptr,
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IN UINT16 Length
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)
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{
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ParseAcpi (
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TRUE,
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2,
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"SBSA Generic Watchdog",
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Ptr,
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Length,
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PARSER_PARAMS (SBSAGenericWatchdogParser)
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);
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}
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/**
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This function parses the ACPI GTDT table.
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When trace is enabled this function parses the GTDT table and
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traces the ACPI table fields.
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This function also parses the following platform timer structures:
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- GT Block timer
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- Watchdog timer
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This function also performs validation of the ACPI table fields.
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@param [in] Trace If TRUE, trace the ACPI fields.
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@param [in] Ptr Pointer to the start of the buffer.
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@param [in] AcpiTableLength Length of the ACPI table.
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@param [in] AcpiTableRevision Revision of the ACPI table.
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**/
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VOID
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EFIAPI
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ParseAcpiGtdt (
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IN BOOLEAN Trace,
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IN UINT8* Ptr,
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IN UINT32 AcpiTableLength,
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IN UINT8 AcpiTableRevision
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)
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{
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UINT32 Index;
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UINT32 Offset;
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UINT8* TimerPtr;
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if (!Trace) {
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return;
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}
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ParseAcpi (
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TRUE,
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0,
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"GTDT",
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Ptr,
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AcpiTableLength,
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PARSER_PARAMS (GtdtParser)
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);
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TimerPtr = Ptr + *GtdtPlatformTimerOffset;
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Offset = *GtdtPlatformTimerOffset;
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Index = 0;
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// Parse the specified number of Platform Timer Structures or the GTDT
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// buffer length. Whichever is minimum.
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while ((Index++ < *GtdtPlatformTimerCount) &&
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(Offset < AcpiTableLength)) {
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// Parse the Platform Timer Header to obtain Length and Type
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ParseAcpi (
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FALSE,
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0,
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NULL,
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TimerPtr,
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AcpiTableLength - Offset,
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PARSER_PARAMS (GtPlatformTimerHeaderParser)
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);
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// Make sure the Platform Timer is inside the table.
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if ((Offset + *PlatformTimerLength) > AcpiTableLength) {
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IncrementErrorCount ();
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Print (
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L"ERROR: Invalid Platform Timer Structure length. " \
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L"PlatformTimerLength = %d. RemainingTableBufferLength = %d. " \
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L"GTDT parsing aborted.\n",
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*PlatformTimerLength,
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AcpiTableLength - Offset
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);
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return;
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}
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switch (*PlatformTimerType) {
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case EFI_ACPI_6_3_GTDT_GT_BLOCK:
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DumpGTBlock (TimerPtr, *PlatformTimerLength);
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break;
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case EFI_ACPI_6_3_GTDT_SBSA_GENERIC_WATCHDOG:
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DumpWatchdogTimer (TimerPtr, *PlatformTimerLength);
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break;
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default:
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IncrementErrorCount ();
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Print (
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L"ERROR: Invalid Platform Timer Type = %d\n",
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*PlatformTimerType
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);
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break;
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} // switch
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TimerPtr += *PlatformTimerLength;
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Offset += *PlatformTimerLength;
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} // while
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}
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