summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
-rw-r--r--DynamicTablesPkg/Library/Acpi/Arm/AcpiSpcrLibArm/SpcrGenerator.c22
1 files changed, 21 insertions, 1 deletions
diff --git a/DynamicTablesPkg/Library/Acpi/Arm/AcpiSpcrLibArm/SpcrGenerator.c b/DynamicTablesPkg/Library/Acpi/Arm/AcpiSpcrLibArm/SpcrGenerator.c
index 24bb5c0146..fecfd6bbab 100644
--- a/DynamicTablesPkg/Library/Acpi/Arm/AcpiSpcrLibArm/SpcrGenerator.c
+++ b/DynamicTablesPkg/Library/Acpi/Arm/AcpiSpcrLibArm/SpcrGenerator.c
@@ -1,7 +1,7 @@
/** @file
SPCR Table Generator
- Copyright (c) 2017 - 2020, Arm Limited. All rights reserved.<BR>
+ Copyright (c) 2017 - 2021, Arm Limited. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
@@ -313,6 +313,26 @@ BuildSpcrTableEx (
// Update the base address
AcpiSpcr.BaseAddress.Address = SerialPortInfo->BaseAddress;
+ // Set the access size
+ if (SerialPortInfo->AccessSize >= EFI_ACPI_6_3_QWORD) {
+ Status = EFI_INVALID_PARAMETER;
+ DEBUG ((
+ DEBUG_ERROR,
+ "ERROR: SPCR: Access size must be <= 3 (DWORD). Status = %r\n",
+ Status
+ ));
+ goto error_handler;
+ } else if (SerialPortInfo->AccessSize == EFI_ACPI_6_3_UNDEFINED) {
+ // 0 Undefined (legacy reasons)
+ // Default to DWORD access size as the access
+ // size field was introduced at a later date
+ // and some ConfigurationManager implementations
+ // may not be providing this field data
+ AcpiSpcr.BaseAddress.AccessSize = EFI_ACPI_6_3_DWORD;
+ } else {
+ AcpiSpcr.BaseAddress.AccessSize = SerialPortInfo->AccessSize;
+ }
+
// Update the UART interrupt
AcpiSpcr.GlobalSystemInterrupt = SerialPortInfo->Interrupt;