From: Pierre Gondois <pierre.gond...@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.gond...@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
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