Hi Tom,
On 31 May 2017 14:10 Tom Rini wrote:
On Wed, May 31, 2017 at 08:27:05AM +0100, Phil Edworthy wrote:
The branch instruction only has an 11-bit relative target address, which is sometimes not enough.
Signed-off-by: Phil Edworthy phil.edworthy@renesas.com
v2:
- Use W(b) instead of ldr+mov. Using this macro requires CONFIG_ARM_ASM_UNIFIED and CONFIG_THUMB2_KERNEL to be
defined.
arch/arm/cpu/armv7m/Makefile | 3 +++ arch/arm/cpu/armv7m/start.S | 4 +++- 2 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/arch/arm/cpu/armv7m/Makefile b/arch/arm/cpu/armv7m/Makefile index 257fc7f..df1fc95 100644 --- a/arch/arm/cpu/armv7m/Makefile +++ b/arch/arm/cpu/armv7m/Makefile @@ -8,3 +8,6 @@ extra-y := start.o obj-y += cpu.o cache.o mpu.o obj-$(CONFIG_SYS_ARCH_TIMER) += systick-timer.o
+asflags-y += -DCONFIG_ARM_ASM_UNIFIED asflags-y += +-DCONFIG_THUMB2_KERNEL
Lets move these two symbols to Kconfig and select them on CPU_V7M, thanks!
These two symbols come from Linux asm files that have been simply copied over to U-Boot, they are not configuration options in U-Boot. They are used by both CPU_V7M and others.
Perhaps I have misunderstood, but for non-CPU_V7M, since CONFIG_THUMB2_KERNEL depends on CONFIG_SYS_THUMB_BUILD, are you asking me to add Kconfig for CONFIG_SYS_THUMB_BUILD?
Thanks Phil
-- Tom