threadx.git/cmake/riscv32_gnu.cmake, branch v6.5.2.202603_rel

riscv32: spec compliance and regression test fix (#691)

2026-09-09T15:40:05Z

* riscv32: spec compliance and regression test fix Signed-off-by: Akif Ejaz * Derived the RISC-V32 frame sizes from the port contract in one place tx_port.h published TX_RISCV_TRAP_FRAME_SIZE for the GNU BSP assembly, but nothing in the port consumed it. Six .S files each rebuilt the same numbers from their own #if, so the interrupt frame size was written out in seven places and the solicited frame size in three. That is the shape that produced the RISC-V64 fault fixed in #708, where the port moved to a padded frame and one copy of the constant did not. The sources now include tx_port.h and take both sizes from it, and no literal frame size remains in the port. TX_RISCV_SOL_FRAME_SIZE joins the contract, since the solicited frame was never published at all. The emitted code is unchanged: 400 and 176 bytes for ILP32D, 128 for soft-float, confirmed by disassembly before and after. Two further corrections: _tx_initialize_low_level carried .global immediately followed by .weak, so the symbol stayed weak and the .global did nothing. Weak is what the port wants, because the example and regression BSPs both provide their own definition, so the stray .global is removed rather than the .weak. Verified with nm that the symbol is still W. The QEMU runner seeded fpu_verified from skip_fpu, so a soft-float run satisfied the FPU gate whether or not the script ever reported the skip. It now starts false and is set only when the skip marker is present, so a run that dies before reaching that point fails instead of passing. Assisted-by: Claude Code (Opus 5) --------- Signed-off-by: Akif Ejaz Co-authored-by: Frédéric Desbiens

Implemented lazy FPU, GP relaxation, and QEMU automation for GNU port in arch/risc-v32 (#513)

2026-05-25T20:43:24Z

This PR adds three functional improvements to the RISC-V 32-bit GNU port. Lazy FPU stacking (tx_thread_context_save.S, tx_thread_context_restore.S, tx_thread_schedule.S): FP register save/restore is now skipped whenmstatus.FS is Off, reducing context switch overhead for threads that do not use floating point. GP relaxation (cmake/riscv32_gnu.cmake, entry.s, link.lds): Enables the -mrelax compiler flag and defines __global_pointer$ in the linker script.The entry stub initializes gp at startup. gp is not saved or restored during context switches. WFI in idle loop (tx_thread_schedule.S): The scheduler issues wfi when no thread is ready, replacing busy-waiting with a low-power sleep. A Python/QEMU/GDB functional test runner is added under ports/risc-v32/gnu/example_build/qemu_virt/test/. It validates context switching, FPUcontext preservation, timer interrupts, and preemption. To run: cd ports/risc-v32/gnu/example_build/qemu_virt make check-functional-riscv32 Tested on QEMU virt machine (rv32gc). Co-authored-by: Wei-Chen Lai Winstonllllai@users.noreply.github.com Co-authored-by: Frédéric Desbiens frederic.desbiens@eclipse-foundation.org Co-authored-by: Copilot 223556219+Copilot@users.noreply.github.com

Added a riscv32 for the OpenHW CVA6 (#511)

2026-05-13T11:46:54Z

Add RISC-V32 arch. port layer

2026-02-16T12:15:13Z

This update adapts the ThreadX low-level kernel routines for RV32, including: - startup and initialization logic - context save/restore implementations - interrupt control and scheduler entry - thread stack build and system return paths - timer interrupt handling - made it complient as per new risc-v64/gnu & threadx style - added reademe for risc-v32/gnu port These changes provide full low-level support needed to run ThreadX on RISC-V32 targets. Signed-off-by: Akif Ejaz