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e300 Processor Core Overview
MPC8308 PowerQUICC II Pro Processor Reference Manual, Rev. 1
Freescale Semiconductor 7-15
Having access to privileged instructions, registers, and other resources allows the operating system to
control the application environment (providing virtual memory and protecting operating system and
critical machine resources). Instructions that control the state of the e300 core, the address translation
mechanism, and supervisor registers can be executed only when the core is operating in supervisor mode.
Figure 7-2 shows all the core registers available at the user and supervisor level. The numbers to the right
of the SPRs indicate the number that is used in the syntax of the instruction operands for the move to/from
SPR instructions.