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arch/arm: add initial support for Cortex-M0/M0+

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Not disabling SysTick as it is optional by the spec.

SVC not used as there is no priority-based interrupt masking (only
PendSV is used).

Largely based on a previous work done by Euan Mutch <euan@abelon.com>.

Jira: ZEP-783

Change-Id: I38e29bfcf0624c1aea5f9fd7a74230faa1b59e8b
Signed-off-by: Ricardo Salveti <ricardo.salveti@linaro.org>
This commit is contained in:
Ricardo Salveti 2016-10-05 19:43:36 -03:00 • committed by Anas Nashif
commit ffacae20d0
18 changed files with 325 additions and 84 deletions
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8
arch/arm/Makefile
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@ -27,6 +27,14 @@ endif
cflags-cortex-m7 = $(call cc-option,-mabi=aapcs -mthumb -mcpu=cortex-m7) \
$(call cc-option,-mthumb -march=armv7e-m)
aflags-$(CONFIG_CPU_CORTEX_M0) += $(cflags-cortex-m0)
cflags-$(CONFIG_CPU_CORTEX_M0) += $(cflags-cortex-m0)
cxxflags-$(CONFIG_CPU_CORTEX_M0) += $(cflags-cortex-m0)
aflags-$(CONFIG_CPU_CORTEX_M0PLUS) += $(cflags-cortex-m0+)
cflags-$(CONFIG_CPU_CORTEX_M0PLUS) += $(cflags-cortex-m0+)
cxxflags-$(CONFIG_CPU_CORTEX_M0PLUS) += $(cflags-cortex-m0+)
aflags-$(CONFIG_CPU_CORTEX_M3) += $(cflags-cortex-m3)
cflags-$(CONFIG_CPU_CORTEX_M3) += $(cflags-cortex-m3)
cxxflags-$(CONFIG_CPU_CORTEX_M3) += $(cflags-cortex-m3)