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| /** @file
| SPCR table parser
|
| Copyright (c) 2016 - 2019, ARM Limited. All rights reserved.
| SPDX-License-Identifier: BSD-2-Clause-Patent
|
| @par Reference(s):
| - Microsoft Serial Port Console Redirection Table
| Specification - Version 1.03 - August 10, 2015.
| **/
|
| #include <IndustryStandard/Acpi.h>
| #include <IndustryStandard/SerialPortConsoleRedirectionTable.h>
| #include <Library/UefiLib.h>
| #include "AcpiParser.h"
| #include "AcpiTableParser.h"
|
| // Local variables
| STATIC ACPI_DESCRIPTION_HEADER_INFO AcpiHdrInfo;
|
| /**
| This function validates the Interrupt Type.
|
| @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
| ValidateInterruptType (
| IN UINT8* Ptr,
| IN VOID* Context
| )
| {
| #if defined (MDE_CPU_ARM) || defined (MDE_CPU_AARCH64)
| UINT8 InterruptType;
|
| InterruptType = *Ptr;
|
| if (InterruptType !=
| EFI_ACPI_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_INTERRUPT_TYPE_GIC) {
| IncrementErrorCount ();
| Print (
| L"\nERROR: InterruptType = %d. This must be 8 on ARM Platforms",
| InterruptType
| );
| }
| #endif
| }
|
| /**
| This function validates the Irq.
|
| @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
| ValidateIrq (
| IN UINT8* Ptr,
| IN VOID* Context
| )
| {
| #if defined (MDE_CPU_ARM) || defined (MDE_CPU_AARCH64)
| UINT8 Irq;
|
| Irq = *Ptr;
|
| if (Irq != 0) {
| IncrementErrorCount ();
| Print (
| L"\nERROR: Irq = %d. This must be zero on ARM Platforms\n",
| Irq
| );
| }
| #endif
| }
|
| /**
| An ACPI_PARSER array describing the ACPI SPCR Table.
| **/
| STATIC CONST ACPI_PARSER SpcrParser[] = {
| PARSE_ACPI_HEADER (&AcpiHdrInfo),
| {L"Interface Type", 1, 36, L"%d", NULL, NULL, NULL, NULL},
| {L"Reserved", 3, 37, L"%x %x %x", Dump3Chars, NULL, NULL, NULL},
| {L"Base Address", 12, 40, NULL, DumpGas, NULL, NULL, NULL},
| {L"Interrupt Type", 1, 52, L"%d", NULL, NULL, ValidateInterruptType, NULL},
| {L"IRQ", 1, 53, L"%d", NULL, NULL, ValidateIrq, NULL},
| {L"Global System Interrupt", 4, 54, L"0x%x", NULL, NULL, NULL, NULL},
| {L"Baud Rate", 1, 58, L"%d", NULL, NULL, NULL, NULL},
| {L"Parity", 1, 59, L"%d", NULL, NULL, NULL, NULL},
| {L"Stop Bits", 1, 60, L"%d", NULL, NULL, NULL, NULL},
| {L"Flow Control", 1, 61, L"0x%x", NULL, NULL, NULL, NULL},
| {L"Terminal Type", 1, 62, L"%d", NULL, NULL, NULL, NULL},
| {L"Reserved", 1, 63, L"%x", NULL, NULL, NULL, NULL},
|
| {L"PCI Device ID", 2, 64, L"0x%x", NULL, NULL, NULL, NULL},
| {L"PCI Vendor ID", 2, 66, L"0x%x", NULL, NULL, NULL, NULL},
| {L"PCI Bus Number", 1, 68, L"0x%x", NULL, NULL, NULL, NULL},
| {L"PCI Device Number", 1, 69, L"0x%x", NULL, NULL, NULL, NULL},
| {L"PCI Function Number", 1, 70, L"0x%x", NULL, NULL, NULL, NULL},
| {L"PCI Flags", 4, 71, L"0x%x", NULL, NULL, NULL, NULL},
| {L"PCI Segment", 1, 75, L"0x%x", NULL, NULL, NULL, NULL},
| {L"Reserved", 4, 76, L"%x", NULL, NULL, NULL, NULL}
| };
|
| /**
| This function parses the ACPI SPCR table.
| When trace is enabled this function parses the SPCR table and
| traces the ACPI table fields.
|
| This function also performs validations 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
| ParseAcpiSpcr (
| IN BOOLEAN Trace,
| IN UINT8* Ptr,
| IN UINT32 AcpiTableLength,
| IN UINT8 AcpiTableRevision
| )
| {
| if (!Trace) {
| return;
| }
|
| // Dump the SPCR
| ParseAcpi (
| TRUE,
| 0,
| "SPCR",
| Ptr,
| AcpiTableLength,
| PARSER_PARAMS (SpcrParser)
| );
| }
|
|
