Ok, so you are looking for software-settable interrupt requests in Software vector mode handshaking.
Just to be clear.
here is a lost of available software-settable interrupt requests:

Configure the INTC for interrupt requests:
interrupt_request_initialization:
Configure HVENn in INTC_BCR.
Configure VTBAn in INTC_IACKRn.
Raise the PRIn fields and set the PRC_SELn fields to the desired processor in INTC_PSRn.
Set the enable bits or clear the mask bits for the peripheral interrupt requests.
Lower PRI in INTC_CPRn to zero.
Enable processor(s) recognition of interrupts.
now you can trigger your software-settable interrupt by setting it in INTC Software Set/Clear Interrupt Register (INTC_SSCIRn).
It is the same as for peripheral interrupts, but you pull request by software.
thats all,
Peter