diff options
| author | Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2016-03-18 22:08:04 +0100 |
|---|---|---|
| committer | Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2016-03-20 15:37:24 +0100 |
| commit | 41bcc440b1a4a85530b45c2b2a30662e6a823b75 (patch) | |
| tree | c17f0a025ae440240e1165dcdfb06eca170db67a /arch | |
| parent | a5152f0cb0fcd496a9dabca4a1e07be98fed5679 (diff) | |
arch/arm: Cortex-M3 provides only Thumb-2
The Cortex-M cores only support Thumb-2, not Thumb. In fact, Thumb-2
is a superset of Thumb, and we could have a single option for both in
Buildroot, since -mthumb on ARMv4/v5 means original Thumb, while
-mthumb on ARMv7 means Thumb 2. However, for clarity, it makes sense
to have two separate options. But in this case, Cortex-M3 should not
advertise that it supports Thumb, as in fact selecting Thumb would
generate Thumb-2 code.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/Config.in.arm | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/Config.in.arm b/arch/Config.in.arm index 33f763a30..cd1ec33b1 100644 --- a/arch/Config.in.arm +++ b/arch/Config.in.arm @@ -172,7 +172,6 @@ config BR2_cortex_a17 select BR2_ARCH_HAS_MMU_OPTIONAL config BR2_cortex_m3 bool "cortex-M3" - select BR2_ARM_CPU_HAS_THUMB select BR2_ARM_CPU_HAS_THUMB2 select BR2_ARM_CPU_ARMV7M config BR2_fa526 |