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MIPS: Optimize the setup of CPU optimization flags

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The current MIPS CPU config.mk code always expects a MIPS 4kc
core. This is not appropiate for other CPUs and SoCs.

Replace the current MIPSFLAGS code by cc-option macro and use
-march=mips32r2 as default optimization level for all MIPS32 CPUs.

Note: Since commit f62fb99941c625605aa16a0097b396a5c16d2c88 all
toolchains with binutils prior to v2.16 are not working anymore.
As agreed with Shinya Kuribayashi the support for those toolchains
will be dropped officially with this patch.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@googlemail.com>
Cc: Wolfgang Denk <wd@denx.de>
Signed-off-by: Shinya Kuribayashi <skuribay@pobox.com>
This commit is contained in:
Daniel Schwierzeck 2011-03-28 18:33:56 +02:00 committed by Shinya Kuribayashi
parent 91809608a4
commit 04efda7afc
1 changed files with 8 additions and 7 deletions
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15
arch/mips/cpu/mips32/config.mk
View File

@ -20,13 +20,14 @@
# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
# MA 02111-1307 USA
#
v=$(shell $(AS) --version | grep 'GNU assembler' | egrep -o '2\.[0-9\.]+' | cut -d. -f2)
MIPSFLAGS:=$(shell \
if [ "$v" -lt "14" ]; then \
echo "-mcpu=4kc"; \
else \
echo "-march=4kc -mtune=4kc"; \
fi)
#
# Default optimization level for MIPS32
#
# Note: Toolchains with binutils prior to v2.16
# are no longer supported by U-Boot MIPS tree!
#
MIPSFLAGS = -march=mips32r2
ifneq (,$(findstring 4KCle,$(CROSS_COMPILE)))
ENDIANNESS = -EL