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SCP-firmware Change Log

Copyright (c) 2019, Arm Limited and Contributors. All rights reserved.

SCP-firmware - version 2.5.0

New features

  • Module-based architecture with an event-driven execution model:

    • Firmware code is organized into modules, where a module fulfills a well- defined role (driver HAL, driver, protocol or service).
    • A framework drives the initialization, orchestration of, and interactions between modules.

  • Processor-agnostic module code enables firmware portability across systems:

    • Processor-dependent features (e.g. interrupt handling) are abstracted from the modules by the framework.
    • The framework relies on an interface whose implementation is processor- dependent to provide these features.

  • Module configurability easing the re-use of modules on different platforms:

    • Strict split between the hardware and software feature configuration data and module code.

  • A native framework test suite provides rapid development and validation of the core framework implementation.

  • Support for Armv7-M control processor architecture based on CMSIS v5 and Keil RTX 5.

  • Provides system initialization support to enable boot of the application cores.

  • Provides the following runtime services:

    • Power domain management
    • System power management
    • Performance domain management (Dynamic voltage and frequency scaling)
    • Clock management
    • Sensor management

  • Provides a reference implementation of the System Control and Management Interface v1.0 (SCMI, platform-side). The SCMI specification can be found here.

  • Provides a build system supporting:

    • The GNU Arm Embedded and Arm Compiler 6 toolchains
    • Platforms with multiple firmware images

  • In-source Doxygen documentation

  • Support for the SGM-775 platform

Known issues

  • The build system does not configure the compiler to avoid code generation of unaligned accesses. As ARMv7-M targets are configured to trap on unaligned word or halfword accesses, this can result in hardware exceptions. This patch fixes this issue.

SCP-firmware - version 2.5.0

New features

  • Modules:

    • CMN600 support
    • DMC620 support
    • apcontext: New module to zero the AP context area

  • Platforms:

    • Support for the SGI-575 platform
    • Support for the Neoverse N1 reference design

Note: Juno, Neoverse N1 SDP, Neoverse E1 reference design and SynQuacer products are NOT part of this release.

Changed

  • Build System:

    • Name firmware bin and elf file by the name of the firmware

  • Documentation:

    • Emphasized that the order of the modules in the BS_FIRMWARE_MODULES list in the firmware definition makefiles is the order in which the modules are initialized, bound and started during the pre-runtime phase.
    • Expand Doxygen use of param [out]
    • Improve coding style and rules

  • Framework:

    • Improve error codes and their documentation
    • Add fwk_module_get_sub_element_count API
    • Improve unit testing of fwk_module.c
    • Replace base alignment reference type with max_align_t

  • Modules:

    • sds: Make initialization deferring optional
    • sds: Send notification once SDS is initialized
    • scmi: Subscribe to SMT ready notifications and send notification when service is initialized
    • smt: Add logging on mailbox ownership error
    • smt: Send notification when each SMT mailbox is initialized
    • sid: Move to an always available interface
    • system_power: Introduce platform interrupts and enable a configurable number of system PPUs
    • cmn600: Add the ccix programming for cmn600

Resolved issues

  • Build System:

    • Disable generation of unaligned accesses

  • Framework:

    • list: Always zero list nodes when removed from a list
    • Zero event list node when duplicating an event

  • Modules:

    • cmn600: Fix inappropriately-initialised global state
    • cmn600: Stop checking type of external nodes
    • ppu_v0: Ensure bound_id is set when bound by system_power
    • system_power: Fix extented PPU support