From f17f994f8c85a0ca58d42c81a14f1134af6ada91 Mon Sep 17 00:00:00 2001 From: Shell Date: Tue, 28 May 2024 14:27:55 +0800 Subject: [arm64] add hw thread self (#8942) * [libcpu] arm64: Add hardware thread_self support This patch introduces hardware-based thread self-identification for the AArch64 architecture. It optimizes thread management by using hardware registers to store and access the current thread's pointer, reducing overhead and improving overall performance. Changes include: - Added `ARCH_USING_HW_THREAD_SELF` configuration option. - Modified `rtdef.h`, `rtsched.h` to conditionally include `critical_switch_flag` based on the new config. - Updated context management in `context_gcc.S`, `cpuport.h` to support hardware-based thread self. - Enhanced `scheduler_mp.c` and `thread.c` to leverage the new hardware thread self feature. These modifications ensure better scheduling and thread handling, particularly in multi-core environments, by minimizing the software overhead associated with thread management. Signed-off-by: Shell * fixup: address suggestion * fixup: rt_current_thread as global * scheduler: add cpu object for UP scheduler Also, maintain the rt_current_thread in cpu object on UP scheduler. --------- Signed-off-by: Shell --- include/rtthread.h | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) (limited to 'include/rtthread.h') diff --git a/include/rtthread.h b/include/rtthread.h index 1cad47931a..386fbaf47e 100644 --- a/include/rtthread.h +++ b/include/rtthread.h @@ -669,6 +669,12 @@ rt_err_t rt_device_control(rt_device_t dev, int cmd, void *arg); void rt_interrupt_enter(void); void rt_interrupt_leave(void); +/** + * CPU object + */ +struct rt_cpu *rt_cpu_self(void); +struct rt_cpu *rt_cpu_index(int index); + #ifdef RT_USING_SMP /* @@ -679,9 +685,6 @@ rt_base_t rt_cpus_lock(void); void rt_cpus_unlock(rt_base_t level); void rt_cpus_lock_status_restore(struct rt_thread *thread); -struct rt_cpu *rt_cpu_self(void); -struct rt_cpu *rt_cpu_index(int index); - #ifdef RT_USING_DEBUG rt_base_t rt_cpu_get_id(void); #else /* !RT_USING_DEBUG */ -- cgit v1.3.1