[Buildroot] [PATCH 2/2] toolchain: Add support for Cortex-M4 processor

Chris Wardman cjwfirmware at vxmdesign.com
Thu Sep 17 07:21:32 UTC 2015


This patch adds support for the Cortex-M4 processor. Cortex-M4 is almost
completely identical to the Cortex-M3 processor. Cortex-M4 uses the same
Thumb2/Thumb instruction set. Not sure if the extra M4 DSP instructions are
currently supported.

Signed-off-by: Chris Wardman <cjwfirmware at vxmdesign.com>
---
 arch/Config.in.arm | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/Config.in.arm b/arch/Config.in.arm
index 4d10f4c..5055cb5 100644
--- a/arch/Config.in.arm
+++ b/arch/Config.in.arm
@@ -156,6 +156,11 @@ config BR2_cortex_m3
 	bool "cortex-M3"
 	select BR2_ARM_CPU_HAS_THUMB
 	select BR2_ARM_CPU_HAS_THUMB2
+config BR2_cortex_m4
+	bool "cortex-M4"
+	select BR2_ARM_CPU_HAS_THUMB
+	select BR2_ARM_CPU_HAR_THUMB2
+	select BR2_ARM_CPU_ARMV7M
 config BR2_fa526
 	bool "fa526/626"
 	select BR2_ARM_CPU_HAS_ARM
@@ -419,6 +424,7 @@ config BR2_GCC_TARGET_CPU
 	default "cortex-a12"	if BR2_cortex_a12
 	default "cortex-a15"	if BR2_cortex_a15
 	default "cortex-m3"	if BR2_cortex_m3
+	default "cortex-m4"     if BR2_cortex_m4
 	default "fa526"		if BR2_fa526
 	default "marvell-pj4"	if BR2_pj4
 	default "strongarm"	if BR2_strongarm
-- 
1.9.1




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