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arch/arm: add support for thumb(1) mode

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[Peter: also adjust BR2_GCC_TARGET_MODE]
Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
This commit is contained in:
Gustavo Zacarias 2013-07-17 12:39:15 -03:00 committed by Peter Korsgaard
parent 8316801f34
commit 79310d3275
1 changed files with 27 additions and 3 deletions
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30
arch/Config.in.arm
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@ -31,6 +31,9 @@ config BR2_ARM_CPU_HAS_VFPV4
bool
select BR2_ARM_CPU_HAS_VFPV3
config BR2_ARM_CPU_HAS_THUMB
bool
config BR2_ARM_CPU_HAS_THUMB2
bool
@ -43,28 +46,38 @@ choice
config BR2_arm7tdmi
bool "arm7tdmi"
select BR2_ARM_CPU_HAS_THUMB
config BR2_arm720t
bool "arm720t"
select BR2_ARM_CPU_HAS_THUMB
config BR2_arm920t
bool "arm920t"
select BR2_ARM_CPU_HAS_THUMB
config BR2_arm922t
bool "arm922t"
select BR2_ARM_CPU_HAS_THUMB
config BR2_arm926t
bool "arm926t"
select BR2_ARM_CPU_MAYBE_HAS_VFPV2
select BR2_ARM_CPU_HAS_THUMB
config BR2_arm10t
bool "arm10t"
select BR2_ARM_CPU_HAS_THUMB
config BR2_arm1136jf_s_r0
bool "arm1136jf_s rev0"
select BR2_ARM_CPU_HAS_VFPV2
select BR2_ARM_CPU_HAS_THUMB
config BR2_arm1136jf_s_r1
bool "arm1136jf_s rev1"
select BR2_ARM_CPU_HAS_VFPV2
select BR2_ARM_CPU_HAS_THUMB
config BR2_arm1176jz_s
bool "arm1176jz-s"
select BR2_ARM_CPU_HAS_THUMB
config BR2_arm1176jzf_s
bool "arm1176jzf-s"
select BR2_ARM_CPU_HAS_VFPV2
select BR2_ARM_CPU_HAS_THUMB
config BR2_cortex_a5
bool "cortex-A5"
select BR2_ARM_CPU_MAYBE_HAS_NEON
@ -99,6 +112,7 @@ config BR2_strongarm
bool "strongarm sa110/sa1100"
config BR2_xscale
bool "xscale"
select BR2_ARM_CPU_HAS_THUMB
config BR2_iwmmxt
bool "iwmmxt"
endchoice
@ -287,7 +301,7 @@ endchoice
choice
prompt "ARM instruction set"
depends on BR2_ARM_CPU_HAS_THUMB2
depends on BR2_ARM_CPU_HAS_THUMB || BR2_ARM_CPU_HAS_THUMB2
config BR2_ARM_INSTRUCTIONS_ARM_CHOICE
bool "ARM"
@ -295,8 +309,18 @@ config BR2_ARM_INSTRUCTIONS_ARM_CHOICE
This option instructs the compiler to generate regular ARM
instructions, that are all 32 bits wide.
config BR2_ARM_INSTRUCTIONS_THUMB
bool "Thumb"
depends on BR2_ARM_CPU_HAS_THUMB
help
This option instructions the compiler to generate Thumb
instructions, which allows to mix 16 bits instructions and
32 bits instructions. This generally provides a much smaller
compiled binary size.
config BR2_ARM_INSTRUCTIONS_THUMB2
bool "Thumb2"
depends on BR2_ARM_CPU_HAS_THUMB2
help
This option instructions the compiler to generate Thumb2
instructions, which allows to mix 16 bits instructions and
@ -307,7 +331,7 @@ endchoice
config BR2_ARM_INSTRUCTIONS_ARM
def_bool y
depends on !BR2_ARM_INSTRUCTIONS_THUMB2
depends on !(BR2_ARM_INSTRUCTIONS_THUMB || BR2_ARM_INSTRUCTIONS_THUMB2)
config BR2_ARCH
default "arm" if BR2_arm
@ -381,4 +405,4 @@ config BR2_GCC_TARGET_FLOAT_ABI
config BR2_GCC_TARGET_MODE
default "arm" if BR2_ARM_INSTRUCTIONS_ARM
default "thumb" if BR2_ARM_INSTRUCTIONS_THUMB2
default "thumb" if BR2_ARM_INSTRUCTIONS_THUMB || BR2_ARM_INSTRUCTIONS_THUMB2