acpica-tools/0001-Add-in-basic-infrastructure-for-big-endian-support.patch

From bb45113bc9aed952a499cd1c53988dc81f597582 Mon Sep 17 00:00:00 2001
From: Al Stone <ahs3@redhat.com>
Date: Thu, 15 Oct 2020 11:53:33 -0600
Subject: [PATCH 01/40] Add in basic infrastructure for big-endian support

This adds in some basic functions -- AcpiUtReadUint32(), for example,
to read a UINT32 value in little-endian form and return it in host-native
format -- along with AcpiUtWriteUint() that writes out an integer in
host-native format as a little-endian value.

But, to do that, I'm adding the functions in a new file: utendian.c.  So,
the header files need fixing, and the makefiles need to be sure to compile
the new code.

However, this sets things up for the future, where endian-aware code can
be added as the need is uncovered.  For now, these functions cover all of
the cases I know about.

Signed-off-by: Al Stone <ahs3@redhat.com>
---
 generate/unix/acpibin/Makefile         |   1 +
 generate/unix/acpidump/Makefile        |   1 +
 generate/unix/acpiexamples/Makefile    |   1 +
 generate/unix/acpiexec/Makefile        |   1 +
 generate/unix/acpihelp/Makefile        |   1 +
 generate/unix/iasl/Makefile            |   1 +
 source/components/utilities/utendian.c | 205 +++++++++++++++++++++++++
 source/include/acutils.h               |  26 ++++
 source/include/platform/aclinux.h      |   5 +
 9 files changed, 242 insertions(+)
 create mode 100644 source/components/utilities/utendian.c

Index: acpica-unix2-20200925/generate/unix/acpibin/Makefile
===================================================================
--- acpica-unix2-20200925.orig/generate/unix/acpibin/Makefile
+++ acpica-unix2-20200925/generate/unix/acpibin/Makefile
@@ -37,6 +37,7 @@ OBJECTS = \
 	$(OBJDIR)/utcache.o\
 	$(OBJDIR)/utdebug.o\
 	$(OBJDIR)/utdecode.o\
+	$(OBJDIR)/utendian.o\
 	$(OBJDIR)/utexcep.o\
 	$(OBJDIR)/utglobal.o\
 	$(OBJDIR)/utlock.o\
Index: acpica-unix2-20200925/generate/unix/acpidump/Makefile
===================================================================
--- acpica-unix2-20200925.orig/generate/unix/acpidump/Makefile
+++ acpica-unix2-20200925/generate/unix/acpidump/Makefile
@@ -36,6 +36,7 @@ OBJECTS = \
 	$(OBJDIR)/osunixdir.o\
 	$(OBJDIR)/osunixmap.o\
 	$(OBJDIR)/osunixxf.o\
+	$(OBJDIR)/utendian.o\
 	$(OBJDIR)/tbprint.o\
 	$(OBJDIR)/tbxfroot.o\
 	$(OBJDIR)/utascii.o\
Index: acpica-unix2-20200925/generate/unix/acpiexamples/Makefile
===================================================================
--- acpica-unix2-20200925.orig/generate/unix/acpiexamples/Makefile
+++ acpica-unix2-20200925/generate/unix/acpiexamples/Makefile
@@ -139,6 +139,7 @@ OBJECTS = \
 	$(OBJDIR)/utdebug.o\
 	$(OBJDIR)/utdecode.o\
 	$(OBJDIR)/utdelete.o\
+	$(OBJDIR)/utendian.o\
 	$(OBJDIR)/uterror.o\
 	$(OBJDIR)/uteval.o\
 	$(OBJDIR)/utexcep.o\
Index: acpica-unix2-20200925/generate/unix/acpiexec/Makefile
===================================================================
--- acpica-unix2-20200925.orig/generate/unix/acpiexec/Makefile
+++ acpica-unix2-20200925/generate/unix/acpiexec/Makefile
@@ -214,6 +214,7 @@ OBJECTS = \
 	$(OBJDIR)/utdebug.o\
 	$(OBJDIR)/utdecode.o\
 	$(OBJDIR)/utdelete.o\
+	$(OBJDIR)/utendian.o\
 	$(OBJDIR)/uterror.o\
 	$(OBJDIR)/uteval.o\
 	$(OBJDIR)/utexcep.o\
Index: acpica-unix2-20200925/generate/unix/acpihelp/Makefile
===================================================================
--- acpica-unix2-20200925.orig/generate/unix/acpihelp/Makefile
+++ acpica-unix2-20200925/generate/unix/acpihelp/Makefile
@@ -43,6 +43,7 @@ OBJECTS = \
 	$(OBJDIR)/getopt.o\
 	$(OBJDIR)/osunixxf.o\
 	$(OBJDIR)/utdebug.o\
+	$(OBJDIR)/utendian.o\
 	$(OBJDIR)/utexcep.o\
 	$(OBJDIR)/utglobal.o\
 	$(OBJDIR)/uthex.o\
Index: acpica-unix2-20200925/generate/unix/iasl/Makefile
===================================================================
--- acpica-unix2-20200925.orig/generate/unix/iasl/Makefile
+++ acpica-unix2-20200925/generate/unix/iasl/Makefile
@@ -225,6 +225,7 @@ OBJECTS = \
 	$(OBJDIR)/utdebug.o\
 	$(OBJDIR)/utdecode.o\
 	$(OBJDIR)/utdelete.o\
+	$(OBJDIR)/utendian.o\
 	$(OBJDIR)/uterror.o\
 	$(OBJDIR)/utexcep.o\
 	$(OBJDIR)/utglobal.o\
Index: acpica-unix2-20200925/source/components/utilities/utendian.c
===================================================================
--- /dev/null
+++ acpica-unix2-20200925/source/components/utilities/utendian.c
@@ -0,0 +1,205 @@
+/******************************************************************************
+ *
+ * Module Name: utendian -- byte swapping support for other-endianness
+ *
+ *****************************************************************************/
+
+/*****************************************************************************
+ *
+ * Copyright (c) 2020, Al Stone <ahs3@redhat.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    substantially similar to the "NO WARRANTY" disclaimer below
+ *    ("Disclaimer") and any redistribution must be conditioned upon
+ *    including a substantially similar Disclaimer requirement for further
+ *    binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Alternatively, you may choose to be licensed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ *****************************************************************************/
+
+#include "acpi.h"
+#include "accommon.h"
+
+#define _COMPONENT          ACPI_COMPILER
+        ACPI_MODULE_NAME    ("utendian")
+
+
+/*
+ * Endianness support functions.
+ *
+ * Ultimately, everything in ACPI tables or AML must be in little-endian
+ * format.  However, we sometimes find it necessary to run on a big-endian
+ * machine and create or read those little-endian values.  This is a small
+ * libary of functions to make that easier, and more visible.
+ *
+ */
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiUtReadUint16
+ *
+ * PARAMETERS:  Src		    - location containing the little-endian
+ *                                    value
+ *
+ * RETURN:      UINT16 value in host-native form
+ *
+ * DESCRIPTION: Read a UINT16 little-endian value from a given location
+ *              and return it in host-native form
+ *
+ ******************************************************************************/
+
+#if defined(ACPI_BIG_ENDIAN)
+UINT16 AcpiUtReadUint16 (void *SrcPtr)
+{
+    UINT16 Result = 0;
+    UINT8  *Dst = (UINT8 *)&Result;
+    UINT8  *Src = (UINT8 *)SrcPtr;
+
+    Dst[0] = Src[1];
+    Dst[1] = Src[0];
+
+    return Result;
+}
+#else
+UINT16 AcpiUtReadUint16 (void *SrcPtr) { return *(UINT16 *)SrcPtr; }
+#endif
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiUtReadUint32
+ *
+ * PARAMETERS:  Src		    - location containing the little-endian
+ *                                    value
+ *
+ * RETURN:      UINT32 value in host-native form
+ *
+ * DESCRIPTION: Read a UINT32 little-endian value from a given location
+ *              and return it in host-native form
+ *
+ ******************************************************************************/
+
+#if defined(ACPI_BIG_ENDIAN)
+UINT32 AcpiUtReadUint32 (void *SrcPtr)
+{
+    UINT32 Result = 0;
+    UINT8  *Dst = (UINT8 *)&Result;
+    UINT8  *Src = (UINT8 *)SrcPtr;
+
+    Dst[0] = Src[3];
+    Dst[1] = Src[2];
+    Dst[2] = Src[1];
+    Dst[3] = Src[0];
+
+    return Result;
+}
+#else
+UINT32 AcpiUtReadUint32 (void *SrcPtr) { return *(UINT32 *)SrcPtr; }
+#endif
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiUtReadUint64
+ *
+ * PARAMETERS:  Src		    - location containing the little-endian
+ *                                    value
+ *
+ * RETURN:      UINT64 value in host-native form
+ *
+ * DESCRIPTION: Read a UINT64 little-endian value from a given location
+ *              and return it in host-native form
+ *
+ ******************************************************************************/
+
+#if defined(ACPI_BIG_ENDIAN)
+UINT64 AcpiUtReadUint64 (void *SrcPtr)
+{
+    UINT64 Result = 0;
+    UINT8  *Dst = (UINT8 *)&Result;
+    UINT8  *Src = (UINT8 *)SrcPtr;
+
+    Dst[0] = Src[7];
+    Dst[1] = Src[6];
+    Dst[2] = Src[5];
+    Dst[3] = Src[4];
+    Dst[4] = Src[3];
+    Dst[5] = Src[2];
+    Dst[6] = Src[1];
+    Dst[7] = Src[0];
+
+    return Result;
+}
+#else
+UINT64 AcpiUtReadUint64 (void *SrcPtr) { return *(UINT64 *)SrcPtr; }
+#endif
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiUtWriteUint
+ *
+ * PARAMETERS:  DstPtr		- where to place the retrieved value
+ *	        DstLength	- space in bytes for this int type
+ *	        SrcPtr		- where the little-endian value lives
+ *	        SrcLength	- space in bytes for this int type
+ *
+ * RETURN:      None.
+ *
+ * DESCRIPTION: Write a host-native integer value of the given size, and
+ * 	        store it in the location specified in little-endian form.
+ * 	        Given the amount of integer type casting done, this general
+ * 	        version seems the most useful (vs 32->32, 32->16, 16->32,
+ * 	        ad infinitum)
+ *
+ ******************************************************************************/
+
+#if defined(ACPI_BIG_ENDIAN)
+void AcpiUtWriteUint (void *DstPtr, int DstLength,
+	              const void *SrcPtr, const int SrcLength)
+{
+    UINT8 *Dst = (UINT8 *)DstPtr;
+    UINT8 *Src = (UINT8 *)SrcPtr;
+    int Length;
+    int ii;
+
+    Length = SrcLength >= DstLength ? DstLength : SrcLength;
+    for (ii = 0; ii < Length; ii++)
+	    Dst[ii] = Src[SrcLength - ii - 1];
+
+}
+#else
+void AcpiUtWriteUint (void *DstPtr, int DstLength,
+	              const void *SrcPtr, const int SrcLength)
+{
+    UINT8 *Dst = (UINT8 *)DstPtr;
+    UINT8 *Src = (UINT8 *)SrcPtr;
+    uint Length;
+
+    Length = SrcLength > DstLength ? DstLength : SrcLength;
+    memcpy(Dst, Src, Length);
+}
+#endif
+
Index: acpica-unix2-20200925/source/include/acutils.h
===================================================================
--- acpica-unix2-20200925.orig/source/include/acutils.h
+++ acpica-unix2-20200925/source/include/acutils.h
@@ -1161,4 +1161,30 @@ AcpiUtConvertStringToUuid (
     UINT8                   *UuidBuffer);
 #endif
 
+/*
+ * utendian -- byte-swapping for big-endian support
+ */
+#if defined(ACPI_ASL_COMPILER) || defined(ACPI_EXEC_APP) || \
+    defined(ACPI_HELP_APP)     || defined(ACPI_DUMP_APP) || \
+    defined(ACPI_EXAMPLE_APP)  || defined(ACPI_BIN_APP)
+UINT32
+AcpiUtReadUint32 (
+    void                    *SrcPtr);
+
+UINT16
+AcpiUtReadUint16 (
+    void                    *SrcPtr);
+
+UINT64
+AcpiUtReadUint64 (
+    void                    *SrcPtr);
+
+void  
+AcpiUtWriteUint (
+    void                    *DstPtr,
+    int                     DstLength,
+    const void              *SrcPtr,
+    const int               SrcLength);
+#endif
+
 #endif /* _ACUTILS_H */
Index: acpica-unix2-20200925/source/include/platform/aclinux.h
===================================================================
--- acpica-unix2-20200925.orig/source/include/platform/aclinux.h
+++ acpica-unix2-20200925/source/include/platform/aclinux.h
@@ -198,6 +198,7 @@
 
 #ifdef ACPI_USE_STANDARD_HEADERS
 #include <unistd.h>
+#include <endian.h>
 #endif
 
 /* Define/disable kernel-specific declarators */
@@ -233,6 +234,10 @@
 #define __cdecl
 #endif
 
+#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+#define ACPI_BIG_ENDIAN
+#endif
+
 #endif /* __KERNEL__ */
 
 #endif /* __ACLINUX_H__ */