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authorYann E. MORIN <yann.morin.1998@anciens.enib.fr>2011-01-09 01:45:05 +0100
committerKhem Raj <raj.khem@gmail.com>2011-06-11 00:06:03 -0700
commitbda6117489ad3de5abfb008a8cb065c9059cd60c (patch)
treec80645330a5661baae8415b95b16134aade2110f
parent0e5a44e8ccf1c5ac49c1319f74c296e875f290e2 (diff)
ARM: introduce blind options to select & force THUMB mode
Add three new blind options to set use of Thumb mode: - COMPILE_IN_THUMB_MODE - if set, CFLAGS will contain -mthumb - if unset, the compiler's default is used - HAS_THUMB - CPUS with Thumb instruction set can select this - use of BX depends on this - FORCE_THUMB - CPUs that are Thumb-only must select this - this selects: HAS_THUMB, COMPILE_IN_THUMB_MODE and USE_BX Also, remove leading space in Rules.mak. Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr> Cc: Khem Raj <raj.khem@gmail.com> Cc: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com> Cc: Carmelo AMOROSO <carmelo.amoroso@st.com> Signed-off-by: Khem Raj <raj.khem@gmail.com>
-rw-r--r--Rules.mak7
-rw-r--r--extra/Configs/Config.arm31
2 files changed, 32 insertions, 6 deletions
diff --git a/Rules.mak b/Rules.mak
index 65fe47c63..8cd666fe6 100644
--- a/Rules.mak
+++ b/Rules.mak
@@ -351,9 +351,10 @@ ifeq ($(TARGET_ARCH),arm)
CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv5te -Wa,-mcpu=xscale
- CPU_CFLAGS-$(CONFIG_ARM_IWMMXT)+=-march=iwmmxt -Wa,-mcpu=iwmmxt -mabi=iwmmxt
- CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M3)+=-mcpu=cortex-m3 -mthumb
- CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M1)+=-mcpu=cortex-m1 -mthumb
+ CPU_CFLAGS-$(CONFIG_ARM_IWMMXT)+=-march=iwmmxt -Wa,-mcpu=iwmmxt -mabi=iwmmxt
+ CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M3)+=-mcpu=cortex-m3
+ CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M1)+=-mcpu=cortex-m1
+ CPU_CFLAGS-$(COMPILE_IN_THUMB_MODE)+=-mthumb
endif
ifeq ($(TARGET_ARCH),mips)
diff --git a/extra/Configs/Config.arm b/extra/Configs/Config.arm
index dd63b807c..93038e9b2 100644
--- a/extra/Configs/Config.arm
+++ b/extra/Configs/Config.arm
@@ -64,70 +64,95 @@ config CONFIG_ARM710
config CONFIG_ARM7TDMI
bool "Arm 7TDMI"
select ARCH_HAS_NO_MMU
+ select HAS_THUMB
config CONFIG_ARM720T
bool "Arm 720T"
select ARCH_HAS_MMU
+ select HAS_THUMB
config CONFIG_ARM920T
bool "Arm 920T"
select ARCH_HAS_MMU
+ select HAS_THUMB
config CONFIG_ARM922T
bool "Arm 922T"
select ARCH_HAS_MMU
+ select HAS_THUMB
config CONFIG_ARM926T
bool "Arm 926T"
select ARCH_HAS_MMU
+ select HAS_THUMB
config CONFIG_ARM10T
bool "Arm 10T"
select ARCH_HAS_MMU
+ select HAS_THUMB
config CONFIG_ARM1136JF_S
bool "Arm 1136JF-S"
select ARCH_HAS_MMU
+ select HAS_THUMB
config CONFIG_ARM1176JZ_S
bool "Arm 1176JZ-S"
select ARCH_HAS_MMU
+ select HAS_THUMB
config CONFIG_ARM1176JZF_S
bool "Arm 1176JZF-S"
select ARCH_HAS_MMU
+ select HAS_THUMB
config CONFIG_ARM_CORTEX_M3
bool "Arm Cortex-M3"
select ARCH_HAS_NO_MMU
- select USE_BX
+ select FORCE_THUMB
config CONFIG_ARM_CORTEX_M1
bool "Arm Cortex-M1"
select ARCH_HAS_NO_MMU
- select USE_BX
+ select FORCE_THUMB
config CONFIG_ARM_SA110
bool "Intel StrongArm SA-110"
select ARCH_HAS_MMU
+ select HAS_THUMB
config CONFIG_ARM_SA1100
bool "Intel StrongArm SA-1100"
select ARCH_HAS_MMU
+ select HAS_THUMB
config CONFIG_ARM_XSCALE
bool "Intel Xscale"
select ARCH_HAS_MMU
+ select HAS_THUMB
config CONFIG_ARM_IWMMXT
bool "Intel Xscale With WMMX PXA27x"
select ARCH_HAS_MMU
+ select HAS_THUMB
endchoice
+config HAS_THUMB
+ bool
+
+config FORCE_THUMB
+ bool
+ select HAS_THUMB
+ select COMPILE_IN_THUMB_MODE
+ select USE_BX
+
+config COMPILE_IN_THUMB_MODE
+ bool
+
config USE_BX
bool "Use BX in function return"
default y
- depends on !CONFIG_GENERIC_ARM && !CONFIG_ARM610 && !CONFIG_ARM710
+ depends on HAS_THUMB
help
Use BX instruction for THUMB aware architectures.