acpica-tools/0016-Support-FADT-aka-FACP-in-a-big-endian-world.patch

From b3051bc2bad8988f3ad81a8307de6f1d0eef4ace Mon Sep 17 00:00:00 2001
From: Al Stone <ahs3@redhat.com>
Date: Sun, 20 Sep 2020 11:42:21 -0600
Subject: [PATCH 16/45] Support FADT (aka, FACP) in a big-endian world

Signed-off-by: Al Stone <ahs3@redhat.com>
---
 source/common/dmtbdump.c          | 25 ++++++++++++-----------
 source/components/tables/tbfadt.c | 34 +++++++++++++++++++++++--------
 2 files changed, 38 insertions(+), 21 deletions(-)

Index: acpica-unix2-20220331/source/common/dmtbdump.c
===================================================================
--- acpica-unix2-20220331.orig/source/common/dmtbdump.c
+++ acpica-unix2-20220331/source/common/dmtbdump.c
@@ -417,11 +417,12 @@ AcpiDmDumpFadt (
     ACPI_TABLE_HEADER       *Table)
 {
     ACPI_STATUS             Status;
+    UINT32                  TableLength = AcpiUtReadUint32 (&Table->Length);
 
 
     /* Always dump the minimum FADT revision 1 fields (ACPI 1.0) */
 
-    Status = AcpiDmDumpTable (Table->Length, 0, Table, 0,
+    Status = AcpiDmDumpTable (TableLength, 0, Table, 0,
         AcpiDmTableInfoFadt1);
     if (ACPI_FAILURE (Status))
     {
@@ -430,10 +431,10 @@ AcpiDmDumpFadt (
 
     /* Check for FADT revision 2 fields (ACPI 1.0B MS extensions) */
 
-    if ((Table->Length > ACPI_FADT_V1_SIZE) &&
-        (Table->Length <= ACPI_FADT_V2_SIZE))
+    if ((TableLength > ACPI_FADT_V1_SIZE) &&
+        (TableLength <= ACPI_FADT_V2_SIZE))
     {
-        Status = AcpiDmDumpTable (Table->Length, 0, Table, 0,
+        Status = AcpiDmDumpTable (TableLength, 0, Table, 0,
             AcpiDmTableInfoFadt2);
         if (ACPI_FAILURE (Status))
         {
@@ -443,9 +444,9 @@ AcpiDmDumpFadt (
 
     /* Check for FADT revision 3/4 fields and up (ACPI 2.0+ extended data) */
 
-    else if (Table->Length > ACPI_FADT_V2_SIZE)
+    else if (TableLength > ACPI_FADT_V2_SIZE)
     {
-        Status = AcpiDmDumpTable (Table->Length, 0, Table, 0,
+        Status = AcpiDmDumpTable (TableLength, 0, Table, 0,
             AcpiDmTableInfoFadt3);
         if (ACPI_FAILURE (Status))
         {
@@ -454,9 +455,9 @@ AcpiDmDumpFadt (
 
         /* Check for FADT revision 5 fields and up (ACPI 5.0+) */
 
-        if (Table->Length > ACPI_FADT_V3_SIZE)
+        if (TableLength > ACPI_FADT_V3_SIZE)
         {
-            Status = AcpiDmDumpTable (Table->Length, 0, Table, 0,
+            Status = AcpiDmDumpTable (TableLength, 0, Table, 0,
                 AcpiDmTableInfoFadt5);
             if (ACPI_FAILURE (Status))
             {
@@ -466,9 +467,9 @@ AcpiDmDumpFadt (
 
         /* Check for FADT revision 6 fields and up (ACPI 6.0+) */
 
-        if (Table->Length > ACPI_FADT_V3_SIZE)
+        if (TableLength > ACPI_FADT_V3_SIZE)
         {
-            Status = AcpiDmDumpTable (Table->Length, 0, Table, 0,
+            Status = AcpiDmDumpTable (TableLength, 0, Table, 0,
                 AcpiDmTableInfoFadt6);
             if (ACPI_FAILURE (Status))
             {
@@ -479,11 +480,11 @@ AcpiDmDumpFadt (
 
     /* Validate various fields in the FADT, including length */
 
-    AcpiTbCreateLocalFadt (Table, Table->Length);
+    AcpiTbCreateLocalFadt (Table, TableLength);
 
     /* Validate FADT length against the revision */
 
-    AcpiDmValidateFadtLength (Table->Revision, Table->Length);
+    AcpiDmValidateFadtLength (Table->Revision, TableLength);
 }
 
 
Index: acpica-unix2-20220331/source/components/tables/tbfadt.c
===================================================================
--- acpica-unix2-20220331.orig/source/components/tables/tbfadt.c
+++ acpica-unix2-20220331/source/components/tables/tbfadt.c
@@ -289,7 +289,6 @@ AcpiTbSelectAddress (
     UINT32                  Address32,
     UINT64                  Address64)
 {
-
     if (!Address64)
     {
         /* 64-bit address is zero, use 32-bit address */
@@ -520,6 +519,9 @@ AcpiTbConvertFadt (
     UINT8                   Length;
     UINT8                   Flags;
     UINT32                  i;
+    UINT32                  Tmp;
+    UINT32                  Value32;
+    UINT64                  Value64;
 
 
     /*
@@ -533,7 +535,7 @@ AcpiTbConvertFadt (
      * Note: The FADT revision value is unreliable. Only the length can be
      * trusted.
      */
-    if (AcpiGbl_FADT.Header.Length <= ACPI_FADT_V2_SIZE)
+    if (AcpiUtReadUint32 (&AcpiGbl_FADT.Header.Length) <= ACPI_FADT_V2_SIZE)
     {
         AcpiGbl_FADT.PreferredProfile = 0;
         AcpiGbl_FADT.PstateControl = 0;
@@ -546,14 +548,19 @@ AcpiTbConvertFadt (
      * current FADT version as defined by the ACPI specification.
      * Thus, we will have a common FADT internally.
      */
-    AcpiGbl_FADT.Header.Length = sizeof (ACPI_TABLE_FADT);
+    Tmp = sizeof (ACPI_TABLE_FADT);
+    AcpiUtWriteUint (&AcpiGbl_FADT.Header.Length, sizeof (UINT32),
+            &Tmp, sizeof (UINT32));
 
     /*
      * Expand the 32-bit DSDT addresses to 64-bit as necessary.
      * Later ACPICA code will always use the X 64-bit field.
      */
-    AcpiGbl_FADT.XDsdt = AcpiTbSelectAddress ("DSDT",
-        AcpiGbl_FADT.Dsdt, AcpiGbl_FADT.XDsdt);
+    Value32 = AcpiUtReadUint32 (&AcpiGbl_FADT.Dsdt);
+    Value64 = AcpiUtReadUint64 (&AcpiGbl_FADT.XDsdt);
+    Value64 = AcpiTbSelectAddress ("DSDT", Value32, Value64);
+    AcpiUtWriteUint (&AcpiGbl_FADT.XDsdt, sizeof (UINT64),
+                &Value64, sizeof (UINT64));
 
     /* If Hardware Reduced flag is set, we are all done */
 
@@ -614,7 +621,11 @@ AcpiTbConvertFadt (
         {
             if (Address64->Address)
             {
-                if (Address64->Address != (UINT64) Address32)
+                Value32 = AcpiUtReadUint32 (&Address32);
+                Value64 = AcpiUtReadUint64 (&Address64->Address);
+
+                /* if (Address64->Address != (UINT64) Address32) */
+                if (Value64 != (UINT64) Value32)
                 {
                     /* Address mismatch */
 
@@ -655,9 +666,10 @@ AcpiTbConvertFadt (
              */
             if (!Address64->Address || AcpiGbl_Use32BitFadtAddresses)
             {
+                Value32 = AcpiUtReadUint32 (&Address32);
                 AcpiTbInitGenericAddress (Address64,
                     ACPI_ADR_SPACE_SYSTEM_IO, Length,
-                    (UINT64) Address32, Name, Flags);
+                    (UINT64) Value32, Name, Flags);
             }
         }
 
@@ -780,10 +792,14 @@ AcpiTbSetupFadtRegisters (
 
         if (Source64->Address)
         {
+            UINT64 Address64;
+
+            Address64 = AcpiUtReadUint64 (&Source64->Address);
+            Address64 +=
+                (FadtPmInfoTable[i].RegisterNum * Pm1RegisterByteWidth);
             AcpiTbInitGenericAddress (FadtPmInfoTable[i].Target,
                 Source64->SpaceId, Pm1RegisterByteWidth,
-                Source64->Address +
-                    (FadtPmInfoTable[i].RegisterNum * Pm1RegisterByteWidth),
+                Address64,
                 "PmRegisters", 0);
         }
     }