Some of the Arm reference design FVP platforms support the Virtio-p9
device as part of the RoS subsystem. Add an entry for this device in
the SSDT acpi table.
The device entry is listed in a new SSDT file as only some of the
reference design FVP platforms support it and so this file is included
in the build for only the platforms that support Virtio-P9 device.
Signed-off-by: Vivek Gautam <vivek.gau...@arm.com>
---
Platform/ARM/SgiPkg/SgiMemoryMap2.dsc.inc | 7 +++-
Platform/ARM/SgiPkg/AcpiTables/SsdtRosVirtioP9.asl | 42 ++++++++++++++++++++
Platform/ARM/SgiPkg/SgiPlatform.dec | 7 +++-
3 files changed, 54 insertions(+), 2 deletions(-)
diff --git a/Platform/ARM/SgiPkg/SgiMemoryMap2.dsc.inc
b/Platform/ARM/SgiPkg/SgiMemoryMap2.dsc.inc
index 78ee48e354a8..12dcd82eb132 100644
--- a/Platform/ARM/SgiPkg/SgiMemoryMap2.dsc.inc
+++ b/Platform/ARM/SgiPkg/SgiMemoryMap2.dsc.inc
@@ -1,5 +1,5 @@
#
-# Copyright (c) 2020 - 2022, Arm Limited. All rights reserved.
+# Copyright (c) 2020 - 2023, Arm Limited. All rights reserved.
#
# SPDX-License-Identifier: BSD-2-Clause-Patent
#
@@ -38,6 +38,11 @@
gArmSgiTokenSpaceGuid.PcdVirtioNetBaseAddress|0x0C150000
gArmSgiTokenSpaceGuid.PcdVirtioNetInterrupt|460
+ # Virtio P9
+ gArmSgiTokenSpaceGuid.PcdVirtioP9BaseAddress|0x0C190000
+ gArmSgiTokenSpaceGuid.PcdVirtioP9Size|0x10000
+ gArmSgiTokenSpaceGuid.PcdVirtioP9Interrupt|459
+
# PCIe
gArmTokenSpaceGuid.PcdPciMmio32Base|0x60000000
gArmTokenSpaceGuid.PcdPciMmio32Size|0x10000000
diff --git a/Platform/ARM/SgiPkg/AcpiTables/SsdtRosVirtioP9.asl
b/Platform/ARM/SgiPkg/AcpiTables/SsdtRosVirtioP9.asl
new file mode 100644
index 000000000000..a1aab5e094b3
--- /dev/null
+++ b/Platform/ARM/SgiPkg/AcpiTables/SsdtRosVirtioP9.asl
@@ -0,0 +1,42 @@
+/** @file
+* Secondary System Description Table Fields (SSDT) for Virtio-P9 device.
+*
+* Some of the Arm Reference Design FVP platforms support the Virtio-P9 device
+* as part of the RoS subsystem. The Virtio-P9 device implements a subset of the
+* Plan 9 file protocol over a virtio transport. It enables accessing a shared
+* directory on the host's filesystem from a running FVP platform.
+* This file describes the SSDT entry for this Virtio-P9 device
+*
+* Copyright (c) 2023, Arm Ltd. All rights reserved.
+*
+* SPDX-License-Identifier: BSD-2-Clause-Patent
+*
+* @par Specification Reference:
+* - ACPI 6.4, Chapter 5, Section 5.2.11.2, Secondary System Description Table
+**/
+
+#include "SgiAcpiHeader.h"
+#include "SgiPlatform.h"
+
+DefinitionBlock ("SsdtRosVirtioP9.aml", "SSDT", 2, "ARMLTD", "ARMSGI",
+ EFI_ACPI_ARM_OEM_REVISION) {
+ Scope (_SB) {
+ // VIRTIO P9 device
+ Device (VP90) {
+ Name (_HID, "LNRO0005")
+ Name (_UID, 2)
+ Name (_CCA, 1) // mark the device coherent
+
+ Name (_CRS, ResourceTemplate() {
+ Memory32Fixed (
+ ReadWrite,
+ FixedPcdGet32 (PcdVirtioP9BaseAddress),
+ FixedPcdGet32 (PcdVirtioP9Size)
+ )
+ Interrupt (ResourceConsumer, Level, ActiveHigh, Exclusive) {
+ FixedPcdGet32 (PcdVirtioP9Interrupt)
+ }
+ })
+ }
+ } // Scope(_SB)
+}
diff --git a/Platform/ARM/SgiPkg/SgiPlatform.dec
b/Platform/ARM/SgiPkg/SgiPlatform.dec
index b9be5c9060b6..e878af24d56b 100644
--- a/Platform/ARM/SgiPkg/SgiPlatform.dec
+++ b/Platform/ARM/SgiPkg/SgiPlatform.dec
@@ -1,5 +1,5 @@
#
-# Copyright (c) 2018 - 2022, Arm Limited. All rights reserved.
+# Copyright (c) 2018 - 2023, Arm Limited. All rights reserved.
#
# SPDX-License-Identifier: BSD-2-Clause-Patent
#
@@ -46,6 +46,11 @@
gArmSgiTokenSpaceGuid.PcdVirtioNetSize|0x00000000|UINT32|0x00000008
gArmSgiTokenSpaceGuid.PcdVirtioNetInterrupt|0x00000000|UINT32|0x00000009
+ # Virtio P9
+ gArmSgiTokenSpaceGuid.PcdVirtioP9BaseAddress|0x00000000|UINT32|0x00000028
+ gArmSgiTokenSpaceGuid.PcdVirtioP9Size|0x00000000|UINT32|0x00000029
+ gArmSgiTokenSpaceGuid.PcdVirtioP9Interrupt|0x00000000|UINT32|0x0000002A
+
# Chip count on the platform
gArmSgiTokenSpaceGuid.PcdChipCount|1|UINT32|0x0000000B
--
2.25.1
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