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