threadx.git/ports/risc-v64/gnu/src/tx_thread_schedule.S, branch v6.5.2.202603_rel

Added lazy FPU stacking and QEMU functional tests for RV64 GNU port (#549)

2026-09-09T20:25:28Z

* add lazy FPU stacking to context save/restore Save mstatus/sstatus to stack slot 29 and skip floating-point register save/restore when FS is Off (bits 14:13). This avoids unnecessary FP context work for threads that do not use the FPU. - context_save: check FS in nested and first-level interrupt paths - context_restore: gate FP restore on nested, no-preempt, and preempt paths - use sstatus when TX_RISCV_SMODE is defined, otherwise mstatus * add QEMU virt CMake build and automated test runner Wire the QEMU virt demo into the CMake build system and add a Python/GDB functional test runner, mirroring the risc-v32/gnu port. - Add qemu_virt/CMakeLists.txt to build kernel.elf and register the check-functional-riscv64 target (requires Python3; skipped if absent) - Link kernel.elf with --whole-archive so all ThreadX symbols resolve - Pin _start at 0x80000000 via .text.boot in entry.s and KEEP(*(.text.boot)) in link.lds - Extend demo_threadx.c with fpu_test_val and shorten thread_0 sleep for GDB-driven FPU, timer, and preemption checks - Add test/azrtos_test_tx_gnu_riscv64_qemu.py; verified passing on QEMU virt (FPU, timer interrupt, preemption) * Clean up RV64 PR scope and remove QEMU test integration leftovers Revert accidental RV64 qemu_virt test/CMake integration changes and keep this branch focused on lazy FPU context handling only. Also remove unintended TX_RISCV_SMODE-based mstatus/sstatus save path and align comments/logic to mstatus-only behavior. * Initialize mstatus.FS in RV64 stack build so new threads start with clean FP state Slot 29 was left uninitialized while context restore reads it as an FP-live hint; garbage FS bits could make a new thread inherit the previous thread's floating-point registers. * Add RV64 regression test for the FP state of a newly created thread The test dirties every floating point register, then creates a thread and checks that the stack builder wrote the mstatus slot and that the new thread starts with all floating point registers zeroed. It is registered for RV64 only, since the RV32 stack builder still leaves the slot unwritten. * Completed the RISC-V64 lazy FPU so the restore side matches the save side The lazy FPU save in this branch skips the floating-point stores when mstatus.FS is Off, and records the mstatus it judged that on in frame slot 29. Merged onto current dev, only the save side had that treatment: both restore paths and the scheduler's interrupt-frame path still reloaded the FP registers unconditionally, from slots the save had deliberately left alone. A thread that never touched the FP unit would have had whatever the frame happened to contain loaded into its registers, and FS driven to Dirty on the way out. The guard is added at the three places that consume an interrupt frame: both paths in _tx_thread_context_restore, and _tx_thread_schedule_loop. Each reads slot 29 and skips the FP block when FS was Off, which is the same shape the risc-v32 port already uses. The solicited path is deliberately left alone. _tx_thread_system_return saves the callee-saved FP registers unconditionally, so restoring them unconditionally is consistent; making that pair lazy as well is a separate change, and risc-v32 is the model for it. Verified with QEMU on all five configurations: risc-v64 96 of 96 passing, five configurations, nothing unlinkable risc-v32 95 of 95 passing, five configurations, unchanged functional check-functional-riscv64 passes every check The ninety-sixth test is the one this branch adds. It is load bearing: seeding stack build with FS = Off instead of Initial makes it fail, and restoring the seed makes it pass, so it guards the behaviour the rest of this branch is about rather than passing regardless. Assisted-by: Claude Code (Opus 5) --------- Co-authored-by: r Co-authored-by: Frédéric Desbiens

riscv64: spec compliance and regression test fix (#698)

2026-09-09T13:26:11Z

* spec compliance Signed-off-by: Akif Ejaz * revert the demo changes Signed-off-by: Akif Ejaz * Restored the FPU demo hook so the RISC-V64 functional test can pass The new check-functional-riscv64 target verifies FPU context switching by watching fpu_test_val advance by 1.1f on each pass through thread_6_and_7_entry. The GDB script deliberately treats a missing symbol as a failure rather than silently skipping the check, but the demo no longer defined it, so the target failed on every run: FPU_VERIFIED_FAIL_NO_SYMBOL The definition and the increment are restored, matching what the risc-v32 demo already carries. The functional target now passes end to end. Three small corrections are folded in: - tx_port.h carried a comment stating that the ISA string must include Zicsr, but nothing enforced it, so an rv64imac build failed with a wall of assembler "unrecognized opcode" errors. It now stops at one clear diagnostic. - Removed TX_RISCV_TRAP_CALL_FRAME_SIZE, which nothing referenced. - The example .gitignore listed qemu-riscv32.log, but the runner writes qemu-riscv64.log, so the generated log showed up as an untracked file. Assisted-by: Claude Code (Opus 5) --------- Signed-off-by: Akif Ejaz Co-authored-by: Frédéric Desbiens

Reverted ULONG to be 4 bytes long, fixing missaligment issue in the current port (#534)

2026-05-25T20:12:33Z

* Reverted RISCV-64 port * Fixed wrong load/store instructions used

Added RISC-V board Bananapi BPI-F3 (SpacemiT K1 SoC) BSP Support (#531)

2026-05-25T19:59:17Z

* Add BananaPi BPI-F3 BSP support Add RISC-V supervisor support to the rv64/gnu port and provide a complete board support package for the BananaPi BPI-F3 (SpacemiT K1 SoC, X60 cores). Port changes (risc-v64/gnu): - Guard all CSR accesses with TX_RISCV_SMODE to select S-mode registers (sstatus/sepc/sie/sret) vs M-mode (mstatus/mepc/mie/mret) in context_save, context_restore, schedule, system_return, interrupt_control, and stack_build. - Add S-mode TX_INT_ENABLE/TX_DISABLE and inline TX_RESTORE macros to tx_port.h. - Add TX_RISCV_SMODE CMake option to CMakeLists.txt. BananaPi BPI-F3 BSP (example_build/bananapi-f3): - Boot flow: FSBL → OpenSBI (M-mode) → U-Boot (S-mode) → ThreadX - S-mode trap handler with context save/restore integration - SBI legacy ecall timer at 10 Hz (24 MHz timebase) - PLIC driver with S-mode context, stale-IRQ drain, and callbacks - PXA-compatible UART0 console (115200 8N1) - Linker script at 0x200000 load address Tested on risc-v board, BananaPi BPI-F3 hardware. Signed-off-by: Akif Ejaz * Fixed S-mode context restore and PLIC spurious IRQ handling - tx_thread_context_restore.S (non-nested path): set SPIE(0x20) alongside SPP(0x100) so sret re-enables interrupts in the restored thread. - tx_thread_context_restore.S (both S-mode paths): use FS=Dirty (0x6000) instead of FS=Initial (0x2000) to match tx_thread_schedule.S and prevent FP register corruption across context switches. - plic.c (plic_irq_intr): return early when plic_claim() yields 0 (no pending interrupt) to avoid completing a spurious IRQ ID 0, which is undefined behavior per the PLIC spec. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> --------- Signed-off-by: Akif Ejaz Co-authored-by: Frédéric Desbiens Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Merge pull request #508 from goodnorning/feature/rv64_rvv_support

2026-04-14T13:26:33Z

Added rv64 rvv support

RISC-V64 arch. port support RVV Extension;

2026-04-07T03:41:33Z

Updated copyright headers and version number constants (#509)

2026-03-05T09:46:30Z

* Updated version number constants * Removed revision history from all files * Added Eclipse ThreadX contributors' copyright header

Cleanup the macros in tx_port.h & comments in inc/*.S

2026-02-05T11:16:59Z

- removed the trailing whitespaces Signed-off-by: Akif Ejaz

few cleanups

2026-01-26T11:08:51Z

Signed-off-by: Akif Ejaz

improve port robustness, portability, and CSR handling

2026-01-26T10:48:46Z

- removed tx_port.h dependency from .S files - replaced tx_timer_interrupt.c with tx_timer_interrupt.S - made some cleanups, formatting to better readability - removed macros (LOAD/STORE/REGBYTES) changed register nomenclature to use RISC-V ABI names (ra, sp, t0, etc.) - added readme_threadx.txt Signed-off-by: Akif Ejaz