The following table lists the ATF functions:
| ATF Functions | Description |
|---|---|
| bl31_arch_setup(); | Generic architectural setup from EL3. |
| bl31_platform_setup(); | Platform setup in BL1. |
| bl31_lib_init(); | Simple function to initialize all BL31 helper libraries. |
| cm_init(); | Context management library initialization routine. |
| dcsw_op_all(DCCSW); | Cleans caches before re-entering the non-secure software world. |
| (*bl32_init)(); | Function pointer to initialize the BL32 image. |
| runtime_svc_init(); | Calls the initialization routine in the descriptor exported by a runtime service. After a descriptor is validated, its start and end owning entity numbers and the call type are combined to form a unique oen. The unique oen is an index into the rt_svc_descs_indices array. This index stores the index of the runtime service descriptor. |
| validate_rt_svc_desc(); | Simple routine to sanity check a runtime service descriptor before it is used. |
| get_unique_oen(); | Gets a unique oen. |
| bl31_prepare_next_image_entry(); | Programs EL3 registers and performs other setup to enable entry into the next image after BL31 at the next ERET. |
| bl31_get_next_image_type(); | Returns the next_image_type. |
| bl31_plat_get_next_image_ep_info (image_type); | Returns a reference to the entry_point_info structure corresponding to the image that runs in the specified security state. |
| get_security_state () | Gets the security state. |
| cm_init_context() | Initializes a cpu_context for the first use by the current CPU, and sets the initial entry point state as specified by the entry_point_info structure. |
| get_scr_el3_from_routing_model() | Returns the cached copy of the SCR_EL3 which contains the routing model (expressed through the IRQ and FIQ bits) for a security state that is stored through a previous call to set_routing_model(). |
| cm_prepare_el3_exit() | Prepares the CPU system registers for first entry into the secure
or the non-secure software world.
For all entries, the EL1 registers are initialized from the cpu_context. |
| cm_get_context(security_state); | Gets the context of the security state. |
| el1_sysregs_context_restore | Restores the context of the system registers. |
| cm_set_next_context | Programs the context used for exception return. This initializes the SP_EL3 to a pointer to a cpu_context set for the required security state. |
| bl31_register_bl32_init | Initializes the pointer to BL32 init function. |
| bl31_set_next_image_type | Accessor function to help runtime services determine which image to execute after BL31. |
For more information about ATF, see Arm Trusted Firmware documentation.