Different of peripheral initial steps between use and not use SYSBIOS on Sitara Processor?

I just start to use SYSBIOS.And already study on sample SYSBIOS project in sdk,Target processor is AM3359.And I find one problem:

When we use startware to build a project,the sample code is enable or wakeup the upstream clock domain(L3,L3S,L4F,L4S) first  then enable the peripheral clock(ex: uart , timer,...). But in SYSBIOS project I found out during initial phase,we just initial the peripheral clock directly without initial the upstream clock domain(L3,L4).Is this handled by SYSBIOS?

Am I right?Or this is done in anotherway?

Thankyou!