The init() function generated as part of native kernel compilation for EVE computes kernel-invariant expressions (called pexprs in the Kernel-C language spec) and stores the computed values in a block of memory called the parameter block, or pblock. As the kernel executes, it references parameter values as memory-mapped 16-bit parameter registers (pregs) that are mapped to the location of the pblock. The parameter block is declared as an array of unsigned short, corresponding to the data type of the pregs. It may be allocated by the application code and passed to both the init() function and the custom() kernel function. Alternately, there is a statically allocated default variable called <kernel>_pblock[] that can be used when the application code does not need to control pblock allocation.

All parameterization of the vloops() function is done through the pblock. Arguments to the kernel() function are not passed to the vloops() function; instead they are captured by the init() function and accessed via the pblock.