[PATCH 12/14] DynamicTablesPkg/AmlLib: Allow larger AccessSize for Pcc address space

["PierreGondois" <pierre.gondois@arm.com>]

From: Pierre Gondois <pierre.gondois@arm.com>

For Pcc address space, the AccessSize field of a Register is
used to delcare the Pcc Subspace Id. This Id can be up to 256.

Cf. ACPI 6.4, s14.7 Referencing the PCC address space

Signed-off-by: Pierre Gondois <Pierre.Gondois@arm.com>
---
 .../Library/Common/AmlLib/CodeGen/AmlResourceDataCodeGen.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlResourceDataCodeGen.c b/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlResourceDataCodeGen.c
index 332962bed441..3901b6e47333 100644
--- a/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlResourceDataCodeGen.c
+++ b/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlResourceDataCodeGen.c
@@ -1257,7 +1257,12 @@ AmlCodeGenRdRegister (
   AML_DATA_NODE                         *RdNode;
   EFI_ACPI_GENERIC_REGISTER_DESCRIPTOR  RdRegister;
 
-  if ((AccessSize > EFI_ACPI_6_4_QWORD)  ||
+  // Cf Cf. ACPI 6.4, s14.7 Referencing the PCC address space
+  // The AccessSize represents the Subspace Id for the PCC address space.
+  if (((AddressSpace == EFI_ACPI_6_3_PLATFORM_COMMUNICATION_CHANNEL) &&
+       (AccessSize > 256)) ||
+      ((AddressSpace != EFI_ACPI_6_3_PLATFORM_COMMUNICATION_CHANNEL) &&
+       (AccessSize > EFI_ACPI_6_4_QWORD)) ||
       ((NameOpNode == NULL) && (NewRdNode == NULL)))
   {
     ASSERT (0);
-- 
2.25.1