| 60,10 → 60,42 |
|---|
| */ |
| void before_thread_runs(void) |
| { |
| before_thread_runs_arch(); |
| fpu_context_restore(&(THREAD->saved_fpu_context)); |
| before_thread_runs_arch(); |
| #ifdef FPU_LAZY |
| if(THREAD==CPU->fpu_owner) |
| fpu_enable(); |
| else |
| fpu_disable(); |
| #else |
| fpu_enable(); |
| if (THREAD->fpu_context_exists) |
| fpu_context_restore(&(THREAD->saved_fpu_context)); |
| else { |
| fpu_init(); |
| THREAD->fpu_context_exists=1; |
| } |
| #endif |
| } |
| |
| #ifdef FPU_LAZY |
| void scheduler_fpu_lazy_request(void) |
| { |
| fpu_enable(); |
| if (CPU->fpu_owner != NULL) { |
| fpu_context_save(&CPU->fpu_owner->saved_fpu_context); |
| /* don't prevent migration */ |
| CPU->fpu_owner->fpu_context_engaged=0; |
| } |
| if (THREAD->fpu_context_exists) |
| fpu_context_restore(&THREAD->saved_fpu_context); |
| else { |
| fpu_init(); |
| THREAD->fpu_context_exists=1; |
| } |
| CPU->fpu_owner=THREAD; |
| THREAD->fpu_context_engaged = 1; |
| } |
| #endif |
| |
| /** Initialize scheduler |
| * |
| 240,7 → 272,9 |
|---|
| |
| if (THREAD) { |
| spinlock_lock(&THREAD->lock); |
| #ifndef FPU_LAZY |
| fpu_context_save(&(THREAD->saved_fpu_context)); |
| #endif |
| if (!context_save(&THREAD->saved_context)) { |
| /* |
| * This is the place where threads leave scheduler(); |