SPARC: The Boot Process

Boot PROM Phase 

The boot PROM runs self-test diagnostics. 

The boot PROM loads the bootblock program.

Boot Programs Phase 

The boot block program loads the ufsboot program.

After the ufsboot program is loaded, it loads the kernel.

Kernel Initialization Phase 

The kernel initializes itself and loads the modules needed to mount the root (/) file system.

init Phase

The kernel starts the init process.

The init process starts the run controls scripts.