sync branch rt-smart. (#6641)

* Synchronize the code of the rt mart branch to the master branch.
  * TTY device
  * Add lwP code from rt-smart
  * Add vnode in DFS, but DFS will be re-write for rt-smart
  * There are three libcpu for rt-smart:
    * arm/cortex-a, arm/aarch64
    * riscv64

Co-authored-by: Rbb666 <[email protected]>
Co-authored-by: zhkag <[email protected]>

1 files changed, 26 insertions, 2 deletions

diff --git a/src/cpu.c b/src/cpu.c
index 2371ec2e5b..5ac6ce82ca 100644
--- a/src/cpu.c
+++ b/src/cpu.c
@@ -10,6 +10,10 @@
 #include <rthw.h>
 #include <rtthread.h>
 
+#ifdef RT_USING_USERSPACE
+#include <lwp.h>
+#endif
+
 #ifdef RT_USING_SMP
 static struct rt_cpu _cpus[RT_CPUS_NR];
 rt_hw_spinlock_t _cpus_lock;
@@ -64,6 +68,7 @@ static void _cpu_preempt_enable(void)
     /* enable interrupt */
     rt_hw_local_irq_enable(level);
 }
+#endif /* RT_USING_SMP */
 
 /**
  * @brief   Initialize a static spinlock object.
@@ -72,7 +77,9 @@ static void _cpu_preempt_enable(void)
  */
 void rt_spin_lock_init(struct rt_spinlock *lock)
 {
+#ifdef RT_USING_SMP
     rt_hw_spin_lock_init(&lock->lock);
+#endif
 }
 RTM_EXPORT(rt_spin_lock_init)
 
@@ -86,8 +93,12 @@ RTM_EXPORT(rt_spin_lock_init)
  */
 void rt_spin_lock(struct rt_spinlock *lock)
 {
+#ifdef RT_USING_SMP
     _cpu_preempt_disable();
     rt_hw_spin_lock(&lock->lock);
+#else
+    rt_enter_critical();
+#endif
 }
 RTM_EXPORT(rt_spin_lock)
 
@@ -98,8 +109,12 @@ RTM_EXPORT(rt_spin_lock)
  */
 void rt_spin_unlock(struct rt_spinlock *lock)
 {
+#ifdef RT_USING_SMP
     rt_hw_spin_unlock(&lock->lock);
     _cpu_preempt_enable();
+#else
+    rt_exit_critical();
+#endif
 }
 RTM_EXPORT(rt_spin_unlock)
 
@@ -115,6 +130,7 @@ RTM_EXPORT(rt_spin_unlock)
  */
 rt_base_t rt_spin_lock_irqsave(struct rt_spinlock *lock)
 {
+#ifdef RT_USING_SMP
     unsigned long level;
 
     _cpu_preempt_disable();
@@ -123,6 +139,9 @@ rt_base_t rt_spin_lock_irqsave(struct rt_spinlock *lock)
     rt_hw_spin_lock(&lock->lock);
 
     return level;
+#else
+    return rt_hw_interrupt_disable();
+#endif
 }
 RTM_EXPORT(rt_spin_lock_irqsave)
 
@@ -135,10 +154,14 @@ RTM_EXPORT(rt_spin_lock_irqsave)
  */
 void rt_spin_unlock_irqrestore(struct rt_spinlock *lock, rt_base_t level)
 {
+#ifdef RT_USING_SMP
     rt_hw_spin_unlock(&lock->lock);
     rt_hw_local_irq_enable(level);
 
     _cpu_preempt_enable();
+#else
+    rt_hw_interrupt_enable(level);
+#endif
 }
 RTM_EXPORT(rt_spin_unlock_irqrestore)
 
@@ -223,6 +246,9 @@ void rt_cpus_lock_status_restore(struct rt_thread *thread)
 {
     struct rt_cpu* pcpu = rt_cpu_self();
 
+#ifdef RT_USING_USERSPACE
+    lwp_mmu_switch(thread);
+#endif
     pcpu->current_thread = thread;
     if (!thread->cpus_lock_nest)
     {
@@ -230,5 +256,3 @@ void rt_cpus_lock_status_restore(struct rt_thread *thread)
     }
 }
 RTM_EXPORT(rt_cpus_lock_status_restore);
-
-#endif /* RT_USING_SMP */