* [U-Boot] [PATCH 2/2] change the way of build little endian board
[not found] ` <1281366824-18811-2-git-send-email-y>
@ 2010-08-09 15:13 ` xiangfu at openmobilefree.net
2010-08-09 17:10 ` Mike Frysinger
0 siblings, 1 reply; 4+ messages in thread
From: xiangfu at openmobilefree.net @ 2010-08-09 15:13 UTC (permalink / raw)
To: u-boot
add CONFIG_CPU_LITTLE_ENDIAN to little endian board config.
use -dumpmachine to check if the cross compile.
Signed-off-by: Xiangfu Liu <xiangfu@openmobilefree.net>
Acked-by: Shinya Kuribayashi <skuribay@pobox.com>
---
Makefile | 1 +
arch/mips/config.mk | 27 +++++++++++++++++++++++++--
arch/mips/cpu/config.mk | 8 --------
include/configs/pb1x00.h | 2 ++
4 files changed, 28 insertions(+), 10 deletions(-)
diff --git a/Makefile b/Makefile
index 451ccdd..47b5622 100644
--- a/Makefile
+++ b/Makefile
@@ -2306,6 +2306,7 @@ dbau1550_config : unconfig
dbau1550_el_config : unconfig
@mkdir -p $(obj)include
@echo "#define CONFIG_DBAU1550 1" >$(obj)include/config.h
+ @echo "#define CONFIG_CPU_LITTLE_ENDIAN" >>$(obj)include/config.h
@$(MKCONFIG) -a dbau1x00 mips mips dbau1x00
gth2_config : unconfig
diff --git a/arch/mips/config.mk b/arch/mips/config.mk
index aa06761..f5d9ac5 100644
--- a/arch/mips/config.mk
+++ b/arch/mips/config.mk
@@ -23,8 +23,6 @@
CROSS_COMPILE ?= mips_4KC-
-STANDALONE_LOAD_ADDR = 0x80200000 -T mips.lds
-
PLATFORM_CPPFLAGS += -DCONFIG_MIPS -D__MIPS__
#
@@ -50,3 +48,28 @@ PLATFORM_CPPFLAGS += -DCONFIG_MIPS -D__MIPS__
PLATFORM_CPPFLAGS += -G 0 -mabicalls -fpic
PLATFORM_CPPFLAGS += -msoft-float
PLATFORM_LDFLAGS += -G 0 -static -n -nostdlib
+
+#
+# We explicitly add the endianness specifier if needed, this allows
+# to compile kernels with a toolchain for the other endianness. We
+# carefully avoid to add it redundantly because gcc 3.3/3.4 complains
+# when fed the toolchain default!
+#
+# Certain gcc versions upto gcc 4.1.1 (probably 4.2-subversion as of
+# 2006-10-10 don't properly change the predefined symbols if -EB / -EL
+# are used, so we kludge that here. A bug has been filed at
+# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29413.
+#
+UNDEF_ALL += -UMIPSEB -U_MIPSEB -U__MIPSEB -U__MIPSEB__
+UNDEF_ALL += -UMIPSEL -U_MIPSEL -U__MIPSEL -U__MIPSEL__
+PREDEF_BE += -DMIPSEB -D_MIPSEB -D__MIPSEB -D__MIPSEB__
+PREDEF_LE += -DMIPSEL -D_MIPSEL -D__MIPSEL -D__MIPSEL__
+ifdef CONFIG_CPU_LITTLE_ENDIAN
+PLATFORM_CPPFLAGS += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' || echo -EL $(UNDEF_ALL) $(PREDEF_LE))
+PLATFORM_LDFLAGS += -EL
+else
+PLATFORM_CPPFLAGS += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' && echo -EB $(UNDEF_ALL) $(PREDEF_BE))
+PLATFORM_LDFLAGS += -EB
+endif
+
+STANDALONE_LOAD_ADDR = 0x80200000 -T mips.lds $(PLATFORM_LDFLAGS)
diff --git a/arch/mips/cpu/config.mk b/arch/mips/cpu/config.mk
index a173c54..098d6c7 100644
--- a/arch/mips/cpu/config.mk
+++ b/arch/mips/cpu/config.mk
@@ -28,12 +28,4 @@ else \
echo "-march=4kc -mtune=4kc"; \
fi)
-ifneq (,$(findstring 4KCle,$(CROSS_COMPILE)))
-ENDIANNESS = -EL
-else
-ENDIANNESS = -EB
-endif
-
-MIPSFLAGS += $(ENDIANNESS)
-
PLATFORM_CPPFLAGS += $(MIPSFLAGS)
diff --git a/include/configs/pb1x00.h b/include/configs/pb1x00.h
index 5ad745e..49ca07c 100644
--- a/include/configs/pb1x00.h
+++ b/include/configs/pb1x00.h
@@ -28,6 +28,8 @@
#ifndef __CONFIG_H
#define __CONFIG_H
+#define CONFIG_CPU_LITTLE_ENDIAN
+
#define CONFIG_MIPS32 1 /* MIPS32 CPU core */
#define CONFIG_PB1X00 1
#define CONFIG_SOC_AU1X00 1 /* alchemy series cpu */
--
1.7.0.4
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