rt-thread.git/libcpu/risc-v/common64, branch copilot/create-device-driver-model-docs

[libcpu-riscv]: [surpport SMP]: Add SMP support for qemu-virt64-riscv

2025-12-04T07:42:09Z

1.Add the necessary function declarations for SMP enablement and implement the corresponding functionalities, including rt_hw_secondary_cpu_up, secondary_cpu_entry, rt_hw_local_irq_disable, rt_hw_local_irq_enable, rt_hw_secondary_cpu_idle_exec, rt_hw_spin_lock_init, rt_hw_spin_lock, rt_hw_spin_unlock, rt_hw_ipi_send, rt_hw_interrupt_set_priority, rt_hw_interrupt_get_priority, rt_hw_ipi_init, rt_hw_ipi_handler_install, and rt_hw_ipi_handler. 2.In the two functions (rt_hw_context_switch_to and rt_hw_context_switch) in context_gcc.S, add a call to rt_cpus_lock_status_restore to update the scheduler information. 3.If the MMU is enabled, use the .percpu section and record different hartids by configuring special page tables; if the MMU is not enabled, record them directly in the satp register. Additionally, add dynamic startup based on core configuration.The .percpu section is only used when both ARCH_MM_MMU and RT_USING_SMP are enabled. However, there is a certain amount of space waste since no macro guard is added for it in the link script currently. 4.The physical memory of QEMU started in CI is 128MB, so RT_HW_PAGE_END is modified from the original +256MB to +128MB. Modify the SConscript file under the common64 directory to include common/atomic_riscv.c in the compilation process. Signed-off-by: Mengchen Teng

Reorganize Group names in build system for clarity and IDE integration #10923

2025-11-16T03:40:53Z

fix(risc-v, mmu): fix type mismatch of `_query`

2025-09-01T10:44:24Z

fix(riscv, cpp): remove `rt_hw_cpu_id` in `cpuport.h` to fix error

2025-09-01T10:42:08Z

[lwp][rv64] restore tp register in arch_thread_signal_enter to fix user-mode memory access

2025-07-23T01:38:35Z

[libcpu][risc-v]:add comment for the round down of symb_pc

2025-05-28T11:37:51Z

[libcpu][risc-v] fix:only map the 1GB space where the original code segment is located

2025-05-28T11:37:51Z

libcpu: riscv: declare external symbols inside

2025-04-11T06:15:12Z

libcpu/risc-v/common64/mmu.c uses the external symbol "__bss_end" (this symbol generally is defined in the link script file) and depends on the extern declaration of this symbol in the bsp's "board.h". This is not a problem in implementation, but it is not a good habit. If this extern symbol is used locally, just declare it locally should be better. In this way, there will be no dependency of the kernel core on the bsp header file. And there will be no special requirements for the bsp board code, such as the need to make extern declarations for these "__bss_end" symbols in "board.h". This patch currently only explicitly externly declares "__bss_end" inside libcpu itself. The code of "#include " is kept, because the modification involved is too large, it is necessary to clean up the bsp involved before cleaning this include code line uniformly. Signed-off-by: Chen Wang

libcpu: cleanup undefined rt_hw_mmu_kernel_map_init (#10177)

2025-04-10T23:54:21Z

* libcpu: cleanup undefined rt_hw_mmu_kernel_map_init rt_hw_mmu_kernel_map_init() is declared in header files but no definition found, cleanup the code. Signed-off-by: Chen Wang * bsp: allwinner: d1: remove calling of rt_hw_mmu_kernel_map_init rt_hw_mmu_kernel_map_init is an undefined function, calling it is meaningless. Signed-off-by: Chen Wang --------- Signed-off-by: Chen Wang

[libcpu][risc-v]add code for handling exception scenarios in _unmap_area.

2025-03-17T09:40:55Z