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307 lines
8.7 KiB
307 lines
8.7 KiB
4 years ago
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/** @file
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GTDT table parser
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Copyright (c) 2016 - 2018, ARM Limited. All rights reserved.
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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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@par Reference(s):
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- ACPI 6.2 Specification - Errata A, September 2017
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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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// 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 CONST UINT16* GtBlockLength;
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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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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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};
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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, (VOID**)&GtBlockLength, 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, NULL, 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 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 > 8) {
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IncrementErrorCount ();
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Print (
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L"\nERROR: Timer Count = %d. Max Timer Count is 8.",
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BlockTimerCount
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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 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 UINT32 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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UINT32 GTBlockTimerLength;
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Offset = 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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GTBlockTimerLength = (*GtBlockLength - Offset) / (*GtBlockTimerCount);
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Length -= Offset;
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if (*GtBlockTimerCount != 0) {
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Ptr += (*GtBlockTimerOffset);
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Index = 0;
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while ((Index < (*GtBlockTimerCount)) && (Length >= GTBlockTimerLength)) {
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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,
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GTBlockTimerLength,
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PARSER_PARAMS (GtBlockTimerParser)
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);
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// Increment by GT Block Timer structure size
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Ptr += Offset;
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Length -= Offset;
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Index++;
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}
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if (Length != 0) {
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IncrementErrorCount ();
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Print (
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L"ERROR:GT Block Timer length mismatch. Unparsed %d bytes.\n",
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Length
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);
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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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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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if (*GtdtPlatformTimerCount != 0) {
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TimerPtr = Ptr + (*GtdtPlatformTimerOffset);
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Index = 0;
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do {
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// Parse the Platform Timer Header
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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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4, // GT Platform Timer structure header length.
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PARSER_PARAMS (GtPlatformTimerHeaderParser)
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);
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switch (*PlatformTimerType) {
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case EFI_ACPI_6_2_GTDT_GT_BLOCK:
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DumpGTBlock (TimerPtr, *PlatformTimerLength);
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break;
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case EFI_ACPI_6_2_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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Index++;
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} while (Index < *GtdtPlatformTimerCount);
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}
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}
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