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arch: improve definition of gcc mtune, mcpu, etc.

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As suggested by Yann E. Morin, there is a better way than our current
big Config.in.common to define the gcc mtune, mcpu, march,
etc. values. We can split the setting of those values in each
architecture file, which makes a lot more sense.

Therefore, the Config.in file now creates empty kconfig variables
BR2_ARCH, BR2_ENDIAN, BR2_GCC_TARGET_TUNE, BR2_GCC_TARGET_ARCH,
BR2_GCC_TARGET_ABI and BR2_GCC_TARGET_CPU. The values of those
variables are set by the individual Config.in.<arch> files. This is
possible because such files are now only conditionally included
depending on the top-level architecture that has been selected.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
This commit is contained in:
Thomas Petazzoni
2012-11-15 03:53:48 +00:00
committed by Peter Korsgaard
parent 53adfc5f49
commit 44c04a2b4a
13 changed files with 361 additions and 249 deletions
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52
arch/Config.in.arm
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@@ -60,3 +60,55 @@ config BR2_ARM_OABI
depends on !BR2_GCC_VERSION_4_7_X
endchoice
config BR2_ARCH
default "arm" if BR2_arm
default "armeb" if BR2_armeb
config BR2_ENDIAN
default "LITTLE" if BR2_arm
default "BIG" if BR2_armeb
config BR2_GCC_TARGET_TUNE
default arm600 if BR2_arm600
default arm610 if BR2_arm610
default arm620 if BR2_arm620
default arm7tdmi if BR2_arm7tdmi
default arm7tdmi if BR2_arm720t
default arm7tdmi if BR2_arm740t
default arm920 if BR2_arm920
default arm920t if BR2_arm920t
default arm922t if BR2_arm922t
default arm926ej-s if BR2_arm926t
default arm1136j-s if BR2_arm1136j_s
default arm1136jf-s if BR2_arm1136jf_s
default arm1176jz-s if BR2_arm1176jz_s
default arm1176jzf-s if BR2_arm1176jzf_s
default cortex-a8 if BR2_cortex_a8
default cortex-a9 if BR2_cortex_a9
default strongarm110 if BR2_sa110
default strongarm1100 if BR2_sa1100
default xscale if BR2_xscale
default iwmmxt if BR2_iwmmxt
config BR2_GCC_TARGET_ARCH
default armv4t if BR2_arm7tdmi
default armv3 if BR2_arm610
default armv3 if BR2_arm710
default armv4t if BR2_arm720t
default armv4t if BR2_arm920t
default armv4t if BR2_arm922t
default armv5te if BR2_arm926t
default armv5t if BR2_arm10t
default armv6j if BR2_arm1136jf_s
default armv6zk if BR2_arm1176jz_s
default armv6zk if BR2_arm1176jzf_s
default armv7-a if BR2_cortex_a8
default armv7-a if BR2_cortex_a9
default armv4 if BR2_sa110
default armv4 if BR2_sa1100
default armv5te if BR2_xscale
default iwmmxt if BR2_iwmmxt
config BR2_GCC_TARGET_ABI
default apcs-gnu if BR2_ARM_OABI
default aapcs-linux if BR2_ARM_EABI