Hi Rebecca,

Thank you for this patch.

I have a minor suggestion marked inline as [SAMI].

Otherwise this patch looks good to me.

Regards,

Sami Mujawar

On 13/01/2022 04:40 PM, Rebecca Cran wrote:

Add a Memory32Fixed function to generate code for the corresponding
Memory32Fixed macro in AML.

Signed-off-by: Rebecca Cran <quic_rcran@quicinc.com><mailto:quic_rcran@quicinc.com>
Reviewed-by: Pierre Gondois <pierre.gondois@arm.com><mailto:pierre.gondois@arm.com>
---
 DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h                        | 33 ++++++++++++
 DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlResourceDataCodeGen.c | 57 ++++++++++++++++++++
 2 files changed, 90 insertions(+)

diff --git a/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h b/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h
index af18bf8e4871..80d05f74ee69 100644
--- a/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h
+++ b/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h
@@ -592,6 +592,39 @@ AmlCodeGenRdDWordMemory (
   OUT       AML_DATA_NODE_HANDLE    *NewRdNode  OPTIONAL
   );

+/** Code generation for the "Memory32Fixed ()" ASL macro.
+
+  The Resource Data effectively created is a 32-bit Memory Resource
+  Data. Cf ACPI 6.4:
+   - s19.6.83 "Memory Resource Descriptor Macro".
+   - s19.2.8 "Memory32FixedTerm".
+
+  See ACPI 6.4 spec, s19.2.8 for more.
+
+  @param [in]  IsReadWrite          ReadAndWrite parameter.
+  @param [in]  Address              AddressBase parameter.
+  @param [in]  RangeLength          Range length.
+  @param [in]  NameOpNode           NameOp object node defining a named object.
+                                    If provided, append the new resource data
+                                    node to the list of resource data elements
+                                    of this node.
+  @param [out] NewMemNode           If provided and success,
+                                    contain the created node.
+
+  @retval EFI_SUCCESS             The function completed successfully.
+  @retval EFI_INVALID_PARAMETER   Invalid parameter.
+  @retval EFI_OUT_OF_RESOURCES    Could not allocate memory.
+**/
+EFI_STATUS
+EFIAPI
+AmlCodeGenRdMemory32Fixed (
+  BOOLEAN                 IsReadWrite,
+  UINT32                  Address,
+  UINT32                  RangeLength,
+  AML_OBJECT_NODE_HANDLE  NameOpNode,
+  AML_DATA_NODE_HANDLE    *NewMemNode
+  );
+
 /** Code generation for the "WordBusNumber ()" ASL function.

   The Resource Data effectively created is a Word Address Space Resource
diff --git a/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlResourceDataCodeGen.c b/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlResourceDataCodeGen.c
index 40d8c2b07ae3..fb18c5a77e2f 100644
--- a/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlResourceDataCodeGen.c
+++ b/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlResourceDataCodeGen.c
@@ -609,6 +609,63 @@ AmlCodeGenRdDWordMemory (
            );
 }

+/** Code generation for the "Memory32Fixed ()" ASL macro.
+
+  The Resource Data effectively created is a 32-bit Memory Resource
+  Data. Cf ACPI 6.4:
+   - s19.6.83 "Memory Resource Descriptor Macro".
+   - s19.2.8 "Memory32FixedTerm".
+
+  See ACPI 6.4 spec, s19.2.8 for more.
+
+  @param [in]  IsReadWrite          ReadAndWrite parameter.
+  @param [in]  Addres               AddressBase parameter.
+  @param [in]  RangeLength          Range length.
+  @param [in]  NameOpNode           NameOp object node defining a named object.
+                                    If provided, append the new resource data
+                                    node to the list of resource data elements
+                                    of this node.
+  @param [out] NewMemNode           If provided and success,
+                                    contain the created node.
+
+  @retval EFI_SUCCESS             The function completed successfully.
+  @retval EFI_INVALID_PARAMETER   Invalid parameter.
+  @retval EFI_OUT_OF_RESOURCES    Could not allocate memory.
+**/
+EFI_STATUS
+EFIAPI
+AmlCodeGenRdMemory32Fixed (
+  BOOLEAN                 IsReadWrite,
+  UINT32                  Address,
+  UINT32                  RangeLength,
+  AML_OBJECT_NODE_HANDLE  NameOpNode,
+  AML_DATA_NODE_HANDLE    *NewMemNode
+  )
+{
+  EFI_STATUS                                     Status;
+  AML_DATA_NODE                                  *MemNode;
+  EFI_ACPI_32_BIT_FIXED_MEMORY_RANGE_DESCRIPTOR  RangeDesc;
+
+  RangeDesc.Header.Header.Byte = ACPI_32_BIT_FIXED_MEMORY_RANGE_DESCRIPTOR;
+  RangeDesc.Header.Length      = 0x09;

[SAMI] Would it be ok if I change the above line to
RangeDesc.Header.Length     = sizeof (EFI_ACPI_32_BIT_FIXED_MEMORY_RANGE_DESCRIPTOR) -
                                    sizeof (ACPI_LARGE_RESOURCE_HEADER);
before merging?
[/SAMI]


+  RangeDesc.Information        = IsReadWrite ? BIT0 : 0;
+  RangeDesc.BaseAddress        = Address;
+  RangeDesc.Length             = RangeLength;
+
+  Status = AmlCreateDataNode (
+             EAmlNodeDataTypeResourceData,
+             (UINT8 *)&RangeDesc,
+             sizeof (RangeDesc),
+             &MemNode
+             );
+  if (EFI_ERROR (Status)) {
+    ASSERT (0);
+    return Status;
+  }
+
+  return LinkRdNode (MemNode, NameOpNode, NewMemNode);
+}
+
 /** Code generation for the "WordSpace ()" ASL function.

   The Resource Data effectively created is a Word Address Space Resource


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