Fujitsu Fujitsu SPARC64 V Deferred traps, Trap precision, Interrupt clearing, Trap priorities

TABLE C-1SPARC64 V Implementation Dependencies		(3 of 11)
Nbr	SPARC64 V Implementation Notes	Page
32	Deferred traps	37, 149
	SPARC64 V signals a deferred trap in a few of its severe error conditions.
	SPARC64 V does not contain a deferred trap queue.
33	Trap precision	37
	There are no deferred traps in SPARC64 V other than the trap caused by a
	few severe error conditions. All traps that occur as the result of program
	execution are precise.
34	Interrupt clearing	—

For details of interrupt handling see Appendix N, Interrupt Handling.

35 Implementation-dependent traps39, 39

SPARC64 V supports the following traps that are implementation dependent:

•interrupt_vector_trap (tt = 06016)

•PA_watchpoint (tt = 06116)

•VA_watchpoint (tt = 06216)

•ECC_error (tt = 06316)

•fast_instruction_access_MMU_miss (tt = 06416 through 06716)

•fast_data_access_MMU_miss (tt = 06816 through 06B16)

•fast_data_access_protection (tt = 06C16 through 06F16)

•async_data_error (tt = 04016)

36	Trap priorities	38
	SPARC64 V’s implementation-dependent traps have the following
	priorities:
	• interrupt_vector_trap (priority=16)
	• PA_watchpoint (priority=12)
	• VA_watchpoint (priority=1)
	• ECC_error (priority=33)
	• fast_instruction_access_MMU_miss (priority = 2)
	• fast_data_access_MMU_miss (priority = 12)
	• fast_data_access_protection (priority = 12)
	• async_data_error (priority = 2)
37	Reset trap	37
	SPARC64 V implements power-on reset (POR) and watchdog reset.
38	Effect of reset trap on implementation-dependent registers	141
	See Section O.3, Processor State after Reset and in RED_state, on page 141.
39	Entering error_state on implementation-dependent errors	36
	CPU watchdog timeout at 233 ticks, a normal trap, or an SIR at TL = MAXTL
	causes the CPU to enter error_state.
40	Error_state processor state	36
	SPARC64 V optionally takes a watchdog reset trap after entry to
	error_state. Most error-logging register state will be preserved. (See also
	impl. dep. #254.)

41Reserved.

72 SPARC JPS1 Implementation Supplement: Fujitsu SPARC64 V • Release 1.0, 1 July 2002