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arch: arm: introduce ARM_NONSECURE_FIRMWARE option

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This commit introduces the K-config option
ARM_NONSECURE_FIRMWARE, to indicate a Zephyr firmware image
that is intended to execute in Non-Secure state.

Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
This commit is contained in:
Ioannis Glaropoulos 2018-05-22 12:15:59 +02:00 • committed by Carles Cufí
commit dd640f143e
1 changed files with 19 additions and 0 deletions
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19
arch/arm/core/Kconfig
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@ -78,6 +78,25 @@ config ARM_SECURE_FIRMWARE
Secure Faults may only be handled by code executing in Secure Secure Faults may only be handled by code executing in Secure
state. state.
config ARM_NONSECURE_FIRMWARE
bool
depends on !ARM_SECURE_FIRMWARE
default n
help
This option indicates that we are building a Zephyr image that
is intended to execute in Non-Secure state. Execution of this
image is triggered by Secure firmware that executes in Secure
state. The option is only applicable to ARMv8-M MCUs that
implement the Security Extension.
This option enables Zephyr to include code that executes in
Non-Secure state only, as well as to exclude code that is
designed to execute only in Secure state.
Code executing in Non-Secure state has no access to Secure
resources of the Cortex-M MCU, and, therefore, it shall avoid
accessing them.
menu "Architecture Floating Point Options" menu "Architecture Floating Point Options"
depends on CPU_HAS_FPU depends on CPU_HAS_FPU