To use these, write the address and number of dwords, then read the result from $addr. Instruction to jump to when the CP is preempted to perform a context switch, initialized to entry 15 of the jump table at bootup. Writing to this triggers a register write and auto-increments REG_WRITE_ADDR. After setting these, read result from $addr2 Write to increase WFI_PEND_CTR, decremented by WFI_PEND_DECR pipe register. Controls whether RB, IB1, or IB2 is executed Controls high 32 bits used by load and store afuc instructions Used to initialize the jump table for handling packets at bootup These are addresses of various preemption records for the current context. When context switching, the CP will save the current state into these buffers, restore the state of the next context from the buffers in the corresponding CP_CONTEXT_SWITCH_PRIV_* registers written by the kernel, then set these internal registers to the contents of those registers. The kernel sets the initial values via CP_SET_PSEUDO_REG on startup, and from then on the firmware keeps track of them. Used only during preemption, saved and restored from the "info" field of a6xx_preemption_record. From the downstream kernel: "Type of record. Written non-zero (usually) by CP. we must set to zero for all ringbuffers." Set by SET_MARKER, used to conditionally execute CP_COND_REG_EXEC and draw states.