uvm_callback实现了回调函数执行的层次性,因此在实现方面,不再是在T的方法中直接呼叫某一个回调方法,而是通过宏`uvm_do_callbacks(T, CB, METHOD)来实现。该宏最直观的作用在于会循环执行已经与该对象结对的uvm_callback中的方法。此外,还有一个宏`uvm_do_callbacks_exit_on(T, CB, METHOD, VAL)可以进一步控...
trans_received(bus_tr tr);58`uvm_do_callbacks_exit_on(bus_driver,bus_driver_cb,trans_received(this,tr),1) // 这里的callback函数用在了主任务所调用的函数里,也是可以的59endfunction6061virtualtasktrans_executed(bus_tr tr);62`uvm_do_callbacks(bus_driver,bus_driver_cb,trans_executed(this,tr)...
此外uvm_do_callbacks_exit_on (T, CB, METHOD, VAL )可以进一步控制执行回调函数的层次,简单来讲,回调函数会保持执行直到返回值与给入的VAL 值相同才会返回。 • 有了uvm_do_ callbacks宏还不够,需要注意的是,在执行回调方法时,依赖的是已经例化的uvm_ callback对象。 所以最后一步需要例化uvm_ callback对...
macros,uvm_register_cb(T,CB),调用相应callbacks的m_register_pair函数; 3)do callback函数的包装; macros,uvm_do_callbacks,遍历iter提供的对象;可以直接在宏中制定function名字; macros,uvm_do_obj_callbacks_exit_on,在函数的某个返回值,退出; 应用中,环境设计者: 1)对uvm_callbacks进行typedef; 2)从uvm_...
(5)回调函数的退出:多个回调函数同时存在时,默认情况下时按照顺序进行,但是也可以通过`uvm_do_callbacks_exit_on的方式控制回调函数的退出,这个宏一共有四个参数,分别是组件类,回调函数类,回调函数中具体方法,值a,回调函数会一直执行,直到返回值a时退出
copy() <= do_copy()print() <= do_print()compare() <= do_compare()pack() <= do_pack() 默认情况下,这些回调函数do_xxx是定义为空的。如果用户执行了uvm_object::copy()函数,那么在该函数执行末尾会自动执行uvm_object::do_copy()。UVM是通过两个相关类uvm_callback_iter和uvm_callbacks #(T,...
1368// STARTED:1369//---1370state_chg.m_prev_state= m_state;1371m_state = UVM_PHASE_STARTED;1372`uvm_do_callbacks(uvm_phase, uvm_phase_cb, phase_state_change(this, state_chg))13731374m_imp.traverse(top,this,UVM_PHASE_STARTED);1375m_ready_to_end_count =0;// reset the ready_to_e...
In the case of C programs compiled with ncc, the main() function can act as an initialization function, register callbacks and return to the VM without exiting. To get a better idea of how this works, you can look at the paint example program. Design Goals UVM is designed with the foll...
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copy() <= do_copy()print() <= do_print()compare() <= do_compare()pack() <= do_pack() 默认情况下,这些回调函数do_xxx是定义为空的。如果用户执行了uvm_object::copy()函数,那么在该函数执行末尾会自动执行uvm_object::do_copy()。UVM是通过两个相关类uvm_callback_iter和uvm_callbacks #(T,...