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Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog.

2026.04

Added

  • HSS: feat(mss-i2c): add non-blocking poll API

    • MSS_I2C_poll() advances the I2C state machine one step if SI is set and returns current master_status

    • MSS_I2C_poll_complete() returns true once the transfer leaves IN_PROGRESS state

  • HSS: feat(boot): allow null AMP payload (for harts that need no initial image)

  • Payload Generator: feat(hss-payload-gen): add null payload support

  • HSS: feat(mpfs-beaglev-fire): reduce TinyCLI auto-boot timeout to 1s

  • HSS: feat(bsp): improve BeagleV-Fire boot logo detail

  • HSS: feat(suspend): add SBI_EXT_SUSP system suspend/resume support

    • waits for secondary harts to reach Idle, enters DDR self-refresh, spins on EVENT_SYSTEM_SUSPEND_RESUME trigger, exits self-refresh, and returns harts to Linux via IPI_MSG_GOTO

    • U54 watchdog monitoring suppressed during suspend

Changed

  • HSS: refactor(envm-wrapper): derive struct offsets from hss_types.h via asm_offsets.c, add decompression bounds checks and UART error spin-loops on failure

  • HSS: refactor(sgdma): add chain length limit and DDR address validation before accepting SGDMA IPI transfers

  • HSS: refactor(gpt): improve GPT partition table validation

  • HSS: refactor(uart): remove unused UART service

  • HSS: refactor(beu): on uncorrectable double-bit ECC error, trigger the hart's watchdog to force a reboot rather than continuing with potentially corrupt state

    • implemented via a weak beu_handle_double_fault() that BSP code can override

    • also use explicit state assignment instead of fragile state++

  • HSS: refactor(build): switch to xPack GNU RISC-V Embedded GCC toolchain

    • SoftConsole-bundled GCC 8.3 support deprecated and will be removed in a future release

    • xPack toolchains are significantly newer with bug fixes and encoding improvements

Fixed

  • HSS: fix(mss-util): sleep_ms() was passing the millisecond argument directly as a raw tick delta

    • multiply by ONE_MILLISEC (derived from LIBERO_SETTING_MSS_RTC_TOGGLE_CLK) so the delay is correct

  • HSS: fix(sgmii): duplicate clock/reset configuration of MAC0 resolved

  • HSS: fix(boot, opensbi): validate U-mode-supplied pointers in boot IPI handler, IHC ecall, and IPC ecall paths to prevent arbitrary M-mode writes or OOB accesses

  • HSS: fix(boot): improve checks for rproc buffer and hart ID range add NULL/DDR validation of extended buffer before dereferencing

  • HSS: fix(qspi): add bounds checks on block offset and count before uint32_t cast guard logical-to-physical map lookups against out-of-range block numbers

  • HSS: fix(storage): NULL writeBlock pointer check and fix size_t truncation issues

  • HSS: fix(ymodem): fix size_t overflow in file-size calculation and ensure filename is null-terminated

  • HSS: fix(hss-state-machine): maxState was recording prevState instead of the executing state, giving incorrect slowest-state diagnostics

  • HSS: fix(hss-clock): HSS_Timer_IsElapsed() could misfire on tick-count wrap

  • HSS: fix(ssmb): add memory barrier before CLINT MSIP write

  • HSS: fix(healthmon): validate checkName[] array index before use

  • Payload Generator: fix(payload-gen): avoid binary corruption on Windows due to line-ending translation in stdio

  • HSS: fix(ddr): correct number of DDR training states

  • HSS: fix(random): random offset was never incremented between reads

  • HSS: fix(hss-init): shift operand must be unsigned to avoid undefined behaviour

  • HSS: fix(tinycli): monitor timestamps not updated for monitor slots > 0

  • HSS: fix(uncompress): decompression failure was silently ignored

  • HSS: fix(state machine): add bounds check on currentState index before dispatch

  • HSS: fix(hss-registry): add missing %s format argument to debug print

  • HSS: fix(memset): size argument was element count rather than byte count

  • HSS: fix(crt.s): hartid bounds check must precede stack pointer calculation

  • HSS: fix(SBI): prevent PLIC reset during Linux boot

  • HSS: fix(build): guard against parallel make dependency races

  • HSS: fix(build): extract and display correct version string

  • HSS: fix(disco-kit): correct linker script region-name typo

  • HSS: fix(platform): correctly re-enable M-mode software interrupts before warmboot wait

    • use csr_set(CSR_MSTATUS, MSTATUS_MIE) instead of csr_write(CSR_MSTATUS, MIP_MSIP) which was zeroing MPP, MPIE and other fields

  • HSS: fix(boot): remove incorrect "to DDR" references in boot messages

    • target address may be L2-scratchpad or other memory, not necessarily DDR

  • HSS: fix(sbi): report SBI version 2.0 to allow Linux to probe SBI_EXT_SUSP

    • all SBI 2.0 feature extensions are optional so existing clients are unaffected

  • HSS: upgrade(mpfs-hal): updating to mpfs-hal v2.3.110

    • fixes display of unit for DDR DRV settings

    • fixes write latency retry causing failure to boot

    • fixes typos in comments and other minor fixes

  • HSS: fix(scrub): fix typo in scrub service

  • HSS: fix(tinycli): post-boot RESUME command warning

2025.07

Added

  • HSS: feat(IHC): Add support for Mi-V IHC v2 IP (available from Libero catalog), deprecate support for IHC v1.

  • HSS: feat(BSP): add boards directory for mpfs-icicle-kit with production silicon

  • HSS: feat(dtb): add minimal device trees for qspi NAND and NOR flash (for use with U-Boot)

  • HSS: feat(ihc): add support for the the Mi-V IHC IP driver v2

    • Starting from the 2025.07 release and onwards, the Icicle Kit reference design will use the Mi-V IHC IP available in the Libero catalog.

      The Mi-V IHC IP version 2 is not backwards compatible with the Mi-V IHC subsystem used in the Icicle Kit reference design 2025.03 or earlier. For this reason, the AMP support in the v2025.07 release will not be backwards compatible with previous releases.

    • Update the compatible string in the Icicle Kit device tree source and blob to the latest 2025.07 reference design, which includes the new MiV-IHC IP v2.

  • HSS: feat(boot): allow null AMP payload (for harts that need no initial image)

  • Payload Generator: feat(hss-payload-gen): add null payload support

  • HSS: feat(mpfs-beaglev-fire): reduce TinyCLI auto-boot timeout to 1 s

  • HSS: feat(bsp): improve BeagleV-Fire boot logo detail

Changed

  • HSS: chore(README): update README for Windows build (python details)

  • HSS: refactor(design-version-info): make functions weak

Fixed

  • HSS: fix(USBDMSC): ensure USB OTG is re-initialized correctly when block is reset.

  • HSS: fix(SBI): fix mismatch in domain memory region order

  • HSS: fix(SBI): prevent PLIC reset during Linux boot

  • HSS: fix(UART): Fix issue with UART_SURRENDER state transitions

  • HSS: fix(SC-SPI): Fix data corruption on System Controller SPI

  • HSS: fix(build): guard against parallel make dependency races

  • HSS: fix(build): extract and display correct version string

  • HSS: fix(disco-kit): correct linker script region-name typo

2025.03

Added

  • HSS: feat(crypto): Add user crypto support

  • Payload Generator: feat(hss-payload-gen): Update README

  • Payload Generator: feat(hss-payload-gen): Add verify to code signing

Changed

  • HSS: trivial: update copyright to 2025

  • HSS: chore(polarberry): tidy comment, remove weak bind

  • HSS: chore(README): update command to program Video Kit

  • HSS: refactor(build): include DIE and PACKAGE arguments

Fixed

  • Payload Generator: fix(hss-payload-gen): Order of YAML issue

  • HSS: fix(mpfs-beaglev-fire): ensure payload gets initiaized

  • HSS: fix(mpfs-beaglev-fire): Add SD/emmc demux

2024.09

Added

Not applicable for this release.

Changed

  • HSS: healthmon: Ensure that health monitoring monitor arrays are board/design specific

  • HSS: README: update command to program Video Kit

  • HSS: build: include DIE and PACKAGE arguments for mpfs-video-kit

Fixed

  • HSS: ymodem: Ensuring watchdog doesn't fire if YMODEM is running.

  • HSS: boot: Fixing some build errors when CONFIG_SERVICE_BOOT is not enabled.

  • HSS: build: ensure -fwhole-program optimizations are not enabled when strong stack protection is enabled.

2024.06

Added

  • HSS: hal: updating to mpfs-hal v2.3.102

  • HSS: lockdown: adding lockdown service (allows custom restrictions of HSS after booting)

    • This provides an opportunity/single place in the code to modify behavior once boot has completed and the user wishes to restrict what the E51/HSS can subsequently do using PMPs/restricted set of state machines to service.

  • HSS: info: update print design version info at startup

  • HSS: trigger: add event triggers to allow state machines synchronize with each other

  • HSS: boot: provide minimal common DTB for U-Boot purposes

Changed

  • HSS: boot: don't delay for DDR training if not needed for a Hart

  • HSS: envm-wrapper: determine HSS UART from BSP rather than hardcoding

  • HSS: sbi: removed unnecessary optimization (O0)

  • HSS: usbdmsc: refactored to make USBDMSC a proper service

Fixed

  • HSS: build: fixed minor issues related to build directory change

  • HSS: healthmon: throttle messages to prevent output flood

2024.02.1

Added

  • HSS: boards: add support for BeagleV Fire BSP

  • HSS: boards: add support for PolarFire SoC Discovery Kit (mpfs-disco-kit)

  • HSS: info: print design version info at startup

  • HSS: MMC: make MMC/SD speed configurable per BSP

  • HSS: gpio-ui: Add GPIO/LED UI service for platforms without serial console

Changed

  • HSS: init: turn on all FICs by default

Fixed

  • HSS: usbdmsc: fix bug in USBDMSC startup

  • HSS: ihc: avoid writes through NULL pointer

  • HSS: scrub: ensure all RAMs can be turned off

  • HSS: spi: fix issues when booting from System Controller SPI Flash

2024.02

Added

  • HSS: crypto: User Crypto support added - supports AES (ECB, CBC, OFB, CFB and CTR modes)

  • HSS: tinycli: Added simple ECC stats to tinyCLI.

  • HSS: boot: Restructured early initialization as a state machine, and offloaded DDR training to U54_1 for faster boot-up.

Changed

  • HSS: scrub: improved scrubbing of LIM, U54 I$/VMA TLBs. Disabled scrubbing by default as it is incompatible with non-coherent PCIe speed-ups enabled by default in MPFS Linux.

  • HSS: tinycli: Simplified early pre-boot CLI to use regular tinyCLI service.

  • HSS: sbi: Tidy-up of ECALL returns

  • HSS: boot: Simplified boot logo to save time.

  • XML: Updated XML for mpfs-video-kit and mpfs-icicle-kit-es

Fixed

  • HSS: init: reset reason type is incorrect

  • Docs: fixed web link to software flow documentation

  • HSS: build: moved build assets to $(BINDIR) directory (from "Default" to "build") and fix make clean on Windows

  • HSS: init: Detect if MPU config prevents USBDMSC

  • QSPI: build issue with QSPI-enabled def_config files resolved

2023.09

Added

  • HSS: opensbi: added unique SBI impid to allow supervisor mode software differentiate HSS from OpenSBI

  • HSS: boards: added PolarBerry support

  • HSS: uart: allow extra serial port configuration (via Kconfig)

Changed

  • HSS: boards: Update to Aries m100pfsevp board support

  • HSS: slight refactoring of uart code

Fixed

  • HSS: post-boot detection

  • HSS: ymodem: increased timeout for more reliable behaviour

  • HSS: ancilliary data: re-register harts after downloading to correctly pass ancilliary data

2023.06

;### Added

  • HSS: Auto Update: added support to mpfs-video-kit (not supported on mpfs-icicle-kit-es)

  • HSS: healthmon: added generic health monitoring service

Changed

  • HSS: fixed various compiler warnings

  • HSS: envm-wrapper: improved boot mode selection

  • HSS: mpfs-hal: updated to v2.2.104

  • HSS: opensbi: updated to v1.2 (SBI v1.0)

  • HSS: sys-services: Updated driver to v2.1.100

Fixed

  • HSS: profiling: refactored, fixed build issue, added user tool, and added documentation on use

  • HSS: mmc: add delay before sending status command, to fix SD failure issue

  • Docs: updated broken link in contribution docs

2023.02

Added

  • HSS: moved default payload.bin destination in DDR to section now reserved in dtbs

  • HSS: mpfs-hal: updated mpfs-hal to v2.2.100

  • HSS: watchdog: support for rebooting individual AMP contexts

  • HSS: reboot: configurable support for cold reboot on fault

  • HSS: sbi: fake mvendorid/marchid/mimpid (to allow Linux driver quirks)

  • HSS: tinycli: allow selection of eMMC, SDCARD, or SDCARD to eMMC as boot medium

  • HSS: beu: errors now logged to HSS console when detected

Changed

  • HSS: memtest: use common routine to interrupt memory test

  • HSS: uart: add hook to control UART assigned per hart

  • HSS: tinycli: refactor to use command command dispatcher

  • HSS: build: give more meaningful errors if files missing for builds

Fixed

  • HSS: reboot: back-to-back reboots would eventually fill queues

  • HSS: envm-wrapper: improvements to avoid cache bugs on startup

  • HSS: scrub: fix bug in calculating end of range

2022.09

Added

  • HSS: OpenSBI: updated to OpenSBI v1.0 (SBI v0.3)

  • HSS: tiny-cli: Added "debug opensbi" command, along with U54 state tracking

  • HSS: mpfs-hal: updated to mpfs-hal v2.0.101

    • Using mpfs-hal to switch MSSIOs for SD/eMMC switchover

    • SDIO_REGISTER renamed to FABRIC_SD_EMMC_DEMUX_SELECT

  • HSS: QSPI: add support for booting from Micron MT25Q

  • HSS: eMMC: fixes for HS200 / HS400

  • HSS: remoteproc: ecall support for remoteproc - the ability to start and stop a remote AMP context using the remoteproc framework in Linux.

    • Payload Generator: add skip-autoboot flag to YAML to skip automatically loading and booting a payload on a per-context basis

    • IHC: various related ecall fixes

  • HSS: reboot: add context-based reboot support (via SRST)

    • Kconfig: add ALLOW_COLDREBOOT option to enable cold reboot

    • Payload Generator: add allow-reboot flag to YAML to control entitlement to warm/cold reboot

  • HSS: ddr: add Kconfig option to skip training DDR

  • HSS: ddr: early output status of DDR training progress

  • Payload Generator: add ability to override context boot image name in YAML

Changed

  • HSS: save space by enabling LTO and whole program optimization

    • Note this means disabling strong stack protection.

    • Removed function names from console output to save space.

Fixed

  • Payload Generator: secure-boot: update from deprecated OpenSSL APIs

  • HSS: platform: fixed potential NULL lookup of fdt

2022.03

Added

  • HSS: QSPI: Add support for booting from Winbond W25N01GV flash

Changed

  • HSS: resets: bringing all peripherals out of reset

  • HSS: scrub: add throttling support to memory scrubber

Fixed

  • HSS: board/custom-board-design: update to build with latest HSS code base

  • HSS: boot: Resolve out-of-bounds issue

2022.02

Added

  • HSS: secure-boot: image signing for payload.bin

  • Payload Generator: secure-boot: support for image signing payload.bin

  • HSS: m100pfsevp: Aries Board Support Package added

  • HSS: Added support for Kconfiglib guiconfig tool

    • This requires python3 tkinter bindings on Linux. For Ubuntu/Debian, use

    $ sudo apt install python3-tk

Changed

  • HSS: DDR: Configured for High-Memory DDR (0x10'0000'0000) instead of Low-Memory (0x8000'0000)

    • WARNING: Pre-existing code will break if not re-linked for the new DDR address

  • HSS: L2: Move decompressed HSS from L2LIM to L2-Scratchpad

Fixed

  • Payload Generator: updated to ignore zero-byte sections

  • Payload Generator: enhance error checks, and ensure string concatenation always safe for names