Refactor the endianness conversion functions and header files.

The endianness of an architecture is now set up automatically using Kconfig
and some common code. The available conversion functions were also expanded
to go to or from a particular endianness. Those use the abbreviation le or be
for little or big endian.

Built for Stumpy and saw coreinfo cbfs support work which uses network
byte order. Used the functions which convert to little endian to implement an
AHCI driver. The source arch is also little endian, so they were effectively
(and successfully) inert.

Change-Id: I3a2d2403855b3e0e93fa34f45e8e542b3e5afeac
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: http://review.coreboot.org/1719
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

11 files changed, 174 insertions, 96 deletions

diff --git a/payloads/libpayload/Config.in b/payloads/libpayload/Config.in
index 701988dff4..8b54f8f4f6 100644
--- a/payloads/libpayload/Config.in
+++ b/payloads/libpayload/Config.in
@@ -377,3 +377,12 @@ config DEBUG_MALLOC
 
 endmenu
 
+config BIG_ENDIAN
+	default n
+	bool
+
+config LITTLE_ENDIAN
+	default n
+	bool
+
+source "arch/Config.in"
diff --git a/payloads/libpayload/arch/Config.in b/payloads/libpayload/arch/Config.in
new file mode 100644
index 0000000000..6734f5a49e
--- /dev/null
+++ b/payloads/libpayload/arch/Config.in
@@ -0,0 +1,24 @@
+##
+## Copyright (c) 2012 The Chromium OS Authors.
+##
+## See file CREDITS for list of people who contributed to this
+## project.
+##
+## This program is free software; you can redistribute it and/or
+## modify it under the terms of the GNU General Public License as
+## published by the Free Software Foundation; either version 2 of
+## the License, or (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but without any warranty; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program; if not, write to the Free Software
+## Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+## MA 02111-1307 USA
+##
+
+source "arch/i386/Config.in"
+source "arch/powerpc/Config.in"
diff --git a/payloads/libpayload/arch/i386/Config.in b/payloads/libpayload/arch/i386/Config.in
new file mode 100644
index 0000000000..ec4c97870d
--- /dev/null
+++ b/payloads/libpayload/arch/i386/Config.in
@@ -0,0 +1,29 @@
+##
+## Copyright (c) 2012 The Chromium OS Authors.
+##
+## See file CREDITS for list of people who contributed to this
+## project.
+##
+## This program is free software; you can redistribute it and/or
+## modify it under the terms of the GNU General Public License as
+## published by the Free Software Foundation; either version 2 of
+## the License, or (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but without any warranty; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program; if not, write to the Free Software
+## Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+## MA 02111-1307 USA
+##
+
+if TARGET_I386
+
+config ARCH_SPECIFIC_OPTIONS # dummy
+	def_bool y
+	select LITTLE_ENDIAN
+
+endif
diff --git a/payloads/libpayload/arch/powerpc/Config.in b/payloads/libpayload/arch/powerpc/Config.in
new file mode 100644
index 0000000000..37318f0da3
--- /dev/null
+++ b/payloads/libpayload/arch/powerpc/Config.in
@@ -0,0 +1,29 @@
+##
+## Copyright (c) 2012 The Chromium OS Authors.
+##
+## See file CREDITS for list of people who contributed to this
+## project.
+##
+## This program is free software; you can redistribute it and/or
+## modify it under the terms of the GNU General Public License as
+## published by the Free Software Foundation; either version 2 of
+## the License, or (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but without any warranty; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program; if not, write to the Free Software
+## Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+## MA 02111-1307 USA
+##
+
+if TARGET_POWERPC
+
+config ARCH_SPECIFIC_OPTIONS # dummy
+	def_bool y
+	select BIG_ENDIAN
+
+endif
diff --git a/payloads/libpayload/drivers/usb/usbmsc.c b/payloads/libpayload/drivers/usb/usbmsc.c
index db369f7bd1..5cfb3c63cb 100644
--- a/payloads/libpayload/drivers/usb/usbmsc.c
+++ b/payloads/libpayload/drivers/usb/usbmsc.c
@@ -27,7 +27,7 @@
  * SUCH DAMAGE.
  */
 
-#include <arch/endian.h>
+#include <endian.h>
 #include <usb/usb.h>
 #include <usb/usbmsc.h>
 #include <usb/usbdisk.h>
diff --git a/payloads/libpayload/include/arpa/inet.h b/payloads/libpayload/include/arpa/inet.h
index 4fc8a895ed..9a5b39bd00 100644
--- a/payloads/libpayload/include/arpa/inet.h
+++ b/payloads/libpayload/include/arpa/inet.h
@@ -30,7 +30,7 @@
 #ifndef _ARPA_INET_H
 #define _ARPA_INET_H
 
-// arch/endian.h already provides ?to?[lwb]
-#include <arch/endian.h>
+// endian.h already provides ?to?[lwb]
+#include <endian.h>
 
 #endif
diff --git a/payloads/libpayload/include/endian.h b/payloads/libpayload/include/endian.h
new file mode 100644
index 0000000000..cd805e0f4e
--- /dev/null
+++ b/payloads/libpayload/include/endian.h
@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2012 The Chromium OS Authors.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but without any warranty; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef _ENDIAN_H_
+#define _ENDIAN_H_
+
+#include <arch/types.h>
+#include <libpayload-config.h>
+
+#define swap_bytes16(in) (((in & 0xFF) << 8) | ((in & 0xFF00) >> 8))
+#define swap_bytes32(in) (((in & 0xFF) << 24) | ((in & 0xFF00) << 8) | \
+			  ((in & 0xFF0000) >> 8) | ((in & 0xFF000000) >> 24))
+#define swap_bytes64(in) (((uint64_t)swap_bytes32((uint32_t)(in)) << 32) | \
+			  ((uint64_t)swap_bytes32((uint32_t)((in) >> 32))))
+
+
+#if defined CONFIG_BIG_ENDIAN
+
+#define htobew(in) (in)
+#define htobel(in) (in)
+#define htobell(in) (in)
+
+#define htolew(in) swap_bytes16(in)
+#define htolel(in) swap_bytes32(in)
+#define htolell(in) swap_bytes64(in)
+
+#elif defined CONFIG_LITTLE_ENDIAN
+
+#define htobew(in) swap_bytes16(in)
+#define htobel(in) swap_bytes32(in)
+#define htobell(in) swap_bytes64(in)
+
+#define htolew(in) (in)
+#define htolel(in) (in)
+#define htolell(in) (in)
+
+#else
+
+#error Cant tell if the CPU is little or big endian.
+
+#endif
+
+#define betohw(in) htobew(in)
+#define betohl(in) htobel(in)
+#define betohll(in) htobell(in)
+
+#define letohw(in) htolew(in)
+#define letohl(in) htolel(in)
+#define letohll(in) htolell(in)
+
+#define htonw(in) htobew(in)
+#define htonl(in) htobel(in)
+#define htonll(in) htobell(in)
+
+#define ntohw(in) htonw(in)
+#define ntohl(in) htonl(in)
+#define ntohll(in) htonll(in)
+
+#endif
diff --git a/payloads/libpayload/include/i386/arch/endian.h b/payloads/libpayload/include/i386/arch/endian.h
deleted file mode 100644
index e0114069fe..0000000000
--- a/payloads/libpayload/include/i386/arch/endian.h
+++ /dev/null
@@ -1,46 +0,0 @@
-/*
- * This file is part of the libpayload project.
- *
- * Copyright (C) 2008 Advanced Micro Devices, Inc.
- *
- * 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.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
- */
-
-#ifndef _ARCH_ENDIAN_H
-#define _ARCH_ENDIAN_H
-
-#include <arch/types.h>
-
-#define ntohw(in) ((( (in) & 0xFF) << 8) | (( (in) & 0xFF00) >> 8))
-
-#define ntohl(in) ((( (in) & 0xFF) << 24) | (( (in) & 0xFF00) << 8) | \
-		(( (in) & 0xFF0000) >> 8) | (( (in) & 0xFF000000) >> 24))
-
-#define ntohll(in) (((u64) ntohl( (in) & 0xFFFFFFFF) << 32) | ((u64) ntohl( (in) >> 32)))
-
-#define htonw(in) ntohw(in)
-#define htonl(in) ntohl(in)
-#define htonll(in) ntohll(in)
-
-#endif
diff --git a/payloads/libpayload/include/powerpc/arch/endian.h b/payloads/libpayload/include/powerpc/arch/endian.h
deleted file mode 100644
index 1b8ff8a808..0000000000
--- a/payloads/libpayload/include/powerpc/arch/endian.h
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
- * This file is part of the libpayload project.
- *
- * Copyright (C) 2008 Advanced Micro Devices, Inc.
- *
- * 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.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
- */
-
-#ifndef _ARCH_ENDIAN_H
-#define _ARCH_ENDIAN_H
-
-#include <arch/types.h>
-
-#define ntohw(in) (in)
-
-#define ntohl(in) (in)
-
-#define ntohll(in) (in)
-
-#define htonw(in) ntohw(in)
-#define htonl(in) ntohw(in)
-#define htonll(in) ntohll(in)
-
-#endif
diff --git a/payloads/libpayload/libc/lar.c b/payloads/libpayload/libc/lar.c
index 9ee09e2ec6..71f240d80b 100644
--- a/payloads/libpayload/libc/lar.c
+++ b/payloads/libpayload/libc/lar.c
@@ -27,8 +27,8 @@
  * SUCH DAMAGE.
  */
 
+#include <endian.h>
 #include <libpayload.h>
-#include <arch/endian.h>
 
 #define ROM_RESET_VECTOR 0xFFFFFFF0
 
diff --git a/payloads/libpayload/libcbfs/cbfs.c b/payloads/libpayload/libcbfs/cbfs.c
index 7da2d58364..fd4cfb2319 100644
--- a/payloads/libpayload/libcbfs/cbfs.c
+++ b/payloads/libpayload/libcbfs/cbfs.c
@@ -27,7 +27,7 @@
  * SUCH DAMAGE.
  */
 
-#include <arch/endian.h>
+#include <endian.h>
 #include <stdio.h>
 #include <string.h>
 #include <cbfs.h>