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

The IsaRange parameter in:
- AmlCodeGenRdDWordIo()
- AmlCodeGenRdQWordIo()
is an hard-coded value. Define an enum for IsarRanges
and use it.

Suggested-by: Leif Lindholm <quic_llind...@quicinc.com>
Signed-off-by: Pierre Gondois <pierre.gond...@arm.com>
---
 .../Include/Library/AmlLib/AmlLib.h           | 28 +++++++++++--------
 .../AcpiSsdtPcieLibArm/SsdtPcieGenerator.c    |  2 +-
 .../AmlLib/CodeGen/AmlResourceDataCodeGen.c   | 28 +++++++------------
 3 files changed, 27 insertions(+), 31 deletions(-)

diff --git a/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h 
b/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h
index 8e24cecdd77b..ce81f5876681 100644
--- a/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h
+++ b/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h
@@ -59,6 +59,18 @@ typedef void *AML_DATA_NODE_HANDLE;
 
 #endif // AML_HANDLE
 
+/** Enum for ISA Ranges.
+
+  See ACPI 6.4 spec, s19.6.34 for more.
+*/
+typedef enum {
+  EAmlIsaRangeReserved = 0,   ///< Reserved.
+  EAmlIsaRangeNonIsaOnly,     ///< NonIsaOnly.
+  EAmlIsaRangeIsaOnly,        ///< IsaOnly.
+  EAmlIsaRangeEntireRange,    ///< EntireRange.
+  EAmlIsaRangeMax,            ///< Max.
+} EAML_ISA_RANGE;
+
 /** Parse the definition block.
 
   The function parses the whole AML blob. It starts with the ACPI DSDT/SSDT
@@ -471,11 +483,7 @@ AmlUpdateRdQWord (
   @param [in]  IsMinFixed           Minimum address is fixed.
   @param [in]  IsMaxFixed           Maximum address is fixed.
   @param [in]  IsPosDecode          Decode parameter
-  @param [in]  IsaRanges            Possible values are:
-                                     0-Reserved
-                                     1-NonISAOnly
-                                     2-ISAOnly
-                                     3-EntireRange
+  @param [in]  IsaRanges            Isa Range.
   @param [in]  AddressGranularity   Address granularity.
   @param [in]  AddressMinimum       Minimum address.
   @param [in]  AddressMaximum       Maximum address.
@@ -505,7 +513,7 @@ AmlCodeGenRdDWordIo (
   IN        BOOLEAN IsMinFixed,
   IN        BOOLEAN IsMaxFixed,
   IN        BOOLEAN IsPosDecode,
-  IN        UINT8 IsaRanges,
+  IN        EAML_ISA_RANGE IsaRanges,
   IN        UINT32 AddressGranularity,
   IN        UINT32 AddressMinimum,
   IN        UINT32 AddressMaximum,
@@ -702,11 +710,7 @@ AmlCodeGenRdWordBusNumber (
   @param [in]  IsMinFixed           Minimum address is fixed.
   @param [in]  IsMaxFixed           Maximum address is fixed.
   @param [in]  IsPosDecode          Decode parameter
-  @param [in]  IsaRanges            Possible values are:
-                                     0-Reserved
-                                     1-NonISAOnly
-                                     2-ISAOnly
-                                     3-EntireRange
+  @param [in]  IsaRanges            Isa Range.
   @param [in]  AddressGranularity   Address granularity.
   @param [in]  AddressMinimum       Minimum address.
   @param [in]  AddressMaximum       Maximum address.
@@ -736,7 +740,7 @@ AmlCodeGenRdQWordIo (
   IN        BOOLEAN IsMinFixed,
   IN        BOOLEAN IsMaxFixed,
   IN        BOOLEAN IsPosDecode,
-  IN        UINT8 IsaRanges,
+  IN        EAML_ISA_RANGE IsaRanges,
   IN        UINT64 AddressGranularity,
   IN        UINT64 AddressMinimum,
   IN        UINT64 AddressMaximum,
diff --git 
a/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.c 
b/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.c
index 9ddaddc198fa..87b426ccfe07 100644
--- a/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.c
+++ b/DynamicTablesPkg/Library/Acpi/Arm/AcpiSsdtPcieLibArm/SsdtPcieGenerator.c
@@ -545,7 +545,7 @@ GeneratePciCrs (
                    TRUE,
                    TRUE,
                    IsPosDecode,
-                   3,
+                   EAmlIsaRangeEntireRange,
                    0,
                    AddrMapInfo->PciAddress,
                    AddrMapInfo->PciAddress + AddrMapInfo->AddressSize - 1,
diff --git 
a/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlResourceDataCodeGen.c 
b/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlResourceDataCodeGen.c
index 9c6700b9e08c..707e8182b4c0 100644
--- a/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlResourceDataCodeGen.c
+++ b/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlResourceDataCodeGen.c
@@ -121,13 +121,13 @@ STATIC
 UINT8
 EFIAPI
 RdIoRangeSpecificFlags (
-  IN  UINT8    IsaRanges,
-  IN  BOOLEAN  IsDenseTranslation,
-  IN  BOOLEAN  IsTypeStatic
+  IN  EAML_ISA_RANGE  IsaRanges,
+  IN  BOOLEAN         IsDenseTranslation,
+  IN  BOOLEAN         IsTypeStatic
   )
 {
   // Only check type specific parameters.
-  if (IsaRanges > 3) {
+  if (IsaRanges >= EAmlIsaRangeMax) {
     ASSERT (0);
     return MAX_UINT8;
   }
@@ -440,20 +440,16 @@ AmlCodeGenRdDWordSpace (
   @param [in]  IsMinFixed           Minimum address is fixed.
   @param [in]  IsMaxFixed           Maximum address is fixed.
   @param [in]  IsPosDecode          Decode parameter
-  @param [in]  IsaRanges            Possible values are:
-                                     0-Reserved
-                                     1-NonISAOnly
-                                     2-ISAOnly
-                                     3-EntireRange
+  @param [in]  IsaRanges            Isa Range.
   @param [in]  AddressGranularity   Address granularity.
   @param [in]  AddressMinimum       Minimum address.
   @param [in]  AddressMaximum       Maximum address.
   @param [in]  AddressTranslation   Address translation.
   @param [in]  RangeLength          Range length.
   @param [in]  ResourceSourceIndex  Resource Source index.
-                                    Unused. Must be 0.
+                                    Not supported. Must be 0.
   @param [in]  ResourceSource       Resource Source.
-                                    Unused. Must be NULL.
+                                    Not supported. Must be NULL.
   @param [in]  IsDenseTranslation   TranslationDensity parameter.
   @param [in]  IsTypeStatic         TranslationType parameter.
   @param [in]  NameOpNode           NameOp object node defining a named object.
@@ -474,7 +470,7 @@ AmlCodeGenRdDWordIo (
   IN        BOOLEAN IsMinFixed,
   IN        BOOLEAN IsMaxFixed,
   IN        BOOLEAN IsPosDecode,
-  IN        UINT8 IsaRanges,
+  IN        EAML_ISA_RANGE IsaRanges,
   IN        UINT32 AddressGranularity,
   IN        UINT32 AddressMinimum,
   IN        UINT32 AddressMaximum,
@@ -1031,11 +1027,7 @@ AmlCodeGenRdQWordSpace (
   @param [in]  IsMinFixed           Minimum address is fixed.
   @param [in]  IsMaxFixed           Maximum address is fixed.
   @param [in]  IsPosDecode          Decode parameter
-  @param [in]  IsaRanges            Possible values are:
-                                     0-Reserved
-                                     1-NonISAOnly
-                                     2-ISAOnly
-                                     3-EntireRange
+  @param [in]  IsaRanges            Isa Range.
   @param [in]  AddressGranularity   Address granularity.
   @param [in]  AddressMinimum       Minimum address.
   @param [in]  AddressMaximum       Maximum address.
@@ -1065,7 +1057,7 @@ AmlCodeGenRdQWordIo (
   IN        BOOLEAN IsMinFixed,
   IN        BOOLEAN IsMaxFixed,
   IN        BOOLEAN IsPosDecode,
-  IN        UINT8 IsaRanges,
+  IN        EAML_ISA_RANGE IsaRanges,
   IN        UINT64 AddressGranularity,
   IN        UINT64 AddressMinimum,
   IN        UINT64 AddressMaximum,
-- 
2.25.1



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