Chapter 2 Installing ThreadX support for ARMv8-M

There are additional ThreadX source code files to support the ARMv8-M architecture.

If ThreadX is to be run in secure mode, these additional files and APIs are not needed. To run ThreadX in secure mode, define the symbol TX_SINGLE_MODE_SECURE at the top of tx_port.h or on the command line or project settings. Ensure TX_SINGLE_MODE_SECURE is defined for all c and assembly files. ThreadX and the user application will execute in secure mode.

If ThreadX and the user application are to run only in non-secure mode, define the symbol TX_SINGLE_MODE_NON_SECURE at the top of tx_port.h or on the command line or project settings. Ensure TX_SINGLE_MODE_NON_SECURE is defined for all c and assembly files. ThreadX and the user application will execute in non-secure mode with no support for making secure function calls.

By default, ThreadX and the user application are designed to run in non-secure mode with support for non-secure callable secure functions. To run ThreadX and the user application in non-secure mode and support non-secure callable secure functions, please do the following:

The file tx_thread_secure_stack.c must be added to the secure application.

The following files must be added to the ThreadX library:

• tx_secure_interface.h
• txe_thread_secure_stack_allocate.c
• txe_thread_secure_stack_free.c
• tx_thread_secure_stack_allocate.s
• tx_thread_secure_stack_free.s

Additional ThreadX Sources for ARMv8-M

The additional ThreadX files for the ARMv8-M TrustZone architecture are described below.