[PATCH v2 5/5] [edk2-platforms] Silicon/SynQuacer: add DBG2 ACPI table

["Masami Hiramatsu" <masami.hiramatsu@linaro.org>]

Add DBG2 table to ACPI tables. The COM1 uart port will be used
for OS debug, and it is 16550 compatible.

Signed-off-by: Masami Hiramatsu <masami.hiramatsu@linaro.org>
---
  Changes in v2:
   - Move Dbg2.aslc before Dsdt.asl to keep the list alphabetically sorted.
   - Use EFI_ACPI_6_3_SYSTEM_MEMORY and EFI_ACPI_6_3_BYTE for initialization.
---
 .../Socionext/SynQuacer/AcpiTables/AcpiTables.inf  |    1 
 Silicon/Socionext/SynQuacer/AcpiTables/Dbg2.aslc   |   70 ++++++++++++++++++++
 2 files changed, 71 insertions(+)
 create mode 100644 Silicon/Socionext/SynQuacer/AcpiTables/Dbg2.aslc

diff --git a/Silicon/Socionext/SynQuacer/AcpiTables/AcpiTables.inf b/Silicon/Socionext/SynQuacer/AcpiTables/AcpiTables.inf
index 886777a0fa..e77d7a3056 100644
--- a/Silicon/Socionext/SynQuacer/AcpiTables/AcpiTables.inf
+++ b/Silicon/Socionext/SynQuacer/AcpiTables/AcpiTables.inf
@@ -19,6 +19,7 @@
 [Sources]
   AcpiTables.h
   AcpiSsdtRootPci.asl
+  Dbg2.aslc
   Dsdt.asl
   Fadt.aslc
   Gtdt.aslc
diff --git a/Silicon/Socionext/SynQuacer/AcpiTables/Dbg2.aslc b/Silicon/Socionext/SynQuacer/AcpiTables/Dbg2.aslc
new file mode 100644
index 0000000000..89c9dbd998
--- /dev/null
+++ b/Silicon/Socionext/SynQuacer/AcpiTables/Dbg2.aslc
@@ -0,0 +1,70 @@
+/** @file
+*  Debug Port Table (DBG2)
+*
+*  Copyright (c) 2020,2021 Linaro Ltd. All rights reserved.
+*
+*  SPDX-License-Identifier: BSD-2-Clause-Patent
+*
+**/
+#include <IndustryStandard/Acpi.h>
+#include <IndustryStandard/DebugPort2Table.h>
+#include <Library/AcpiLib.h>
+#include <Library/PcdLib.h>
+#include <Platform/MemoryMap.h>
+
+#include "AcpiTables.h"
+
+#pragma pack(1)
+
+#define SYNQUACER_UART1_STR { '\\', '_', 'S', 'B', '.', 'C', 'O', 'M', '1', 0x00 }
+#define SQ_GAS32(Address) { EFI_ACPI_6_3_SYSTEM_MEMORY, 32, 0, EFI_ACPI_6_3_BYTE, Address }
+
+typedef struct {
+  EFI_ACPI_DBG2_DEBUG_DEVICE_INFORMATION_STRUCT Dbg2Device;
+  EFI_ACPI_6_3_GENERIC_ADDRESS_STRUCTURE        BaseAddressRegister;
+  UINT32                                        AddressSize;
+  UINT8                                         NameSpaceString[10];
+} DBG2_DEBUG_DEVICE_INFORMATION;
+
+typedef struct {
+  EFI_ACPI_DEBUG_PORT_2_DESCRIPTION_TABLE       Description;
+  DBG2_DEBUG_DEVICE_INFORMATION                 Dbg2DeviceInfo;
+} DBG2_TABLE;
+
+
+STATIC DBG2_TABLE Dbg2 = {
+  {
+    __ACPI_HEADER (
+      EFI_ACPI_6_3_DEBUG_PORT_2_TABLE_SIGNATURE,
+      DBG2_TABLE,
+      EFI_ACPI_DBG2_DEBUG_DEVICE_INFORMATION_STRUCT_REVISION
+    ),
+    OFFSET_OF (DBG2_TABLE, Dbg2DeviceInfo),
+    1                                      /* NumberOfDebugPorts */
+  },
+  {
+    {
+      EFI_ACPI_DBG2_DEBUG_DEVICE_INFORMATION_STRUCT_REVISION,
+      sizeof (DBG2_DEBUG_DEVICE_INFORMATION),
+      1,                                   /* NumberofGenericAddressRegisters */
+      10,                                  /* NameSpaceStringLength */
+      OFFSET_OF (DBG2_DEBUG_DEVICE_INFORMATION, NameSpaceString),
+      0,                                   /* OemDataLength */
+      0,                                   /* OemDataOffset */
+      EFI_ACPI_DBG2_PORT_TYPE_SERIAL,
+      EFI_ACPI_DBG2_PORT_SUBTYPE_SERIAL_16550_WITH_GAS,
+      {EFI_ACPI_RESERVED_BYTE, EFI_ACPI_RESERVED_BYTE},
+      OFFSET_OF (DBG2_DEBUG_DEVICE_INFORMATION, BaseAddressRegister),
+      OFFSET_OF (DBG2_DEBUG_DEVICE_INFORMATION, AddressSize)
+    },
+    SQ_GAS32 (SYNQUACER_UART1_BASE),       /* BaseAddressRegister */
+    SYNQUACER_UART1_SIZE,                  /* AddressSize */
+    SYNQUACER_UART1_STR,                   /* NameSpaceString */
+  }
+};
+
+#pragma pack()
+
+// Reference the table being generated to prevent the optimizer from removing
+// the data structure from the executable
+VOID* CONST ReferenceAcpiTable = &Dbg2;