mmu_crueltt.s

操作系统SunOS 4.1.3版本的源码

#ident "@(#)mmu_crueltt.s	1.1 8/6/90 SMI"

/*
 * Copyright (c) 1990 by Sun Microsystems, Inc
 */

/*

	Adapted from @(#)crueltt.s	1.16	6/9/89
	trap table and window over/under flow trap handlers
	for use on Verilog description of custom sunrise.

	swk added some stuff to the reset handler to deal
	with enabling the mmu.

	6/22	swk	Changed T_reset to T_RESET so mpsas 
			parsing of sym.dat file will work. 	
	6/25	swk	Added switch to disable ITBR if wanted.

*/


!----------------------------------------------------------------------
! Link in trap handling routines by #defining the entry point before
! #including crueltt.


#ifndef IAE_HANDLER
#ifdef	iae_handler
#define IAE_HANDLER	iae_handler
#else
#define IAE_HANDLER	TRAP(unimplemented_trap)
#endif
#endif

#ifndef IAER_HANDLER
#ifdef	iaer_handler
#define IAER_HANDLER	iaer_handler
#else
#define IAER_HANDLER	TRAP(unimplemented_trap)
#endif
#endif

#ifndef DAE_HANDLER
#ifdef	dae_handler
#define DAE_HANDLER	dae_handler
#else
#define DAE_HANDLER	TRAP(unimplemented_trap)
#endif
#endif

#ifndef DAER_HANDLER
#ifdef	daer_handler
#define DAER_HANDLER	daer_handler
#else
#define DAER_HANDLER	TRAP(unimplemented_trap)
#endif
#endif

#ifndef INT14_HANDLER
#define INT14_HANDLER	int_handler
#endif

#ifndef INT15_HANDLER
#define INT15_HANDLER	int_handler
#endif

#ifndef UNIMP_HANDLER
#define UNIMP_HANDLER	unimplemented_trap
#endif

#ifndef PRIV_HANDLER
#define PRIV_HANDLER	unimplemented_trap
#endif

#ifndef FPDIS_HANDLER
#define FPDIS_HANDLER	unimplemented_trap
#endif

#ifndef CPDIS_HANDLER
#define CPDIS_HANDLER	unimplemented_trap
#endif

#ifndef OFL_HANDLER
#define OFL_HANDLER	win_overflow
#endif

#ifndef UFL_HANDLER
#define UFL_HANDLER	win_underflow
#endif

#ifndef MALGN_HANDLER
#define MALGN_HANDLER	unimplemented_trap
#endif

#ifndef FPX_HANDLER
#define FPX_HANDLER	unimplemented_trap
#endif

#ifndef CPX_HANDLER
#define CPX_HANDLER	unimplemented_trap
#endif

#ifndef TAGOF_HANDLER
#define TAGOF_HANDLER	unimplemented_trap
#endif

! register file parity error handler
#ifndef RFE_HANDLER
#define RFE_HANDLER	unimplemented_trap
#endif


#ifndef SWTRAP_0
#define SWTRAP_0	set_super
#endif

#ifndef SWTRAP_1
#define SWTRAP_1	unimplemented_trap
#endif

#ifndef SWTRAP_2
#define SWTRAP_2	unimplemented_trap
#endif

#ifndef SWTRAP_3
#define SWTRAP_3	unimplemented_trap
#endif

#ifndef SW_TRAP_HANDLER
#define other_swtraps	unimplemented_trap
#endif

!----------------------------------------------------------------------

#include "exc_handlers.s"

#define TRAP(label) b label; rd %psr, %l0; nop; nop
	.global address_0
	.global _start
address_0:
T_reset:			TRAP(T_RESET)			! 0
T_instr_access_exception:	IAE_HANDLER			! 1
T_unimplemented_instruction:	TRAP(UNIMP_HANDLER)	        ! 2
T_privileged_instruction:	TRAP(PRIV_HANDLER)	        ! 3
T_fp_disabled:			TRAP(FPDIS_HANDLER)	        ! 4
T_window_overflow:		TRAP(OFL_HANDLER)		! 5
T_window_underflow:		TRAP(UFL_HANDLER)		! 6
T_mem_addr_not_aligned:		TRAP(MALGN_HANDLER)	        ! 7
T_fp_exception:			TRAP(FPX_HANDLER)               ! 8
T_data_access_exception:	DAE_HANDLER			! 9
T_tag_overflow:			TRAP(TAGOF_HANDLER)	        ! 10

				TRAP(unimplemented_trap)        ! 11
				TRAP(unimplemented_trap)        ! 12
				TRAP(unimplemented_trap)        ! 13
				TRAP(unimplemented_trap)        ! 14
				TRAP(unimplemented_trap)        ! 15
				TRAP(unimplemented_trap)        ! 16


T_int_1:			int_handler			! 17
T_int_2:			int_handler			! 18
T_int_3:			int_handler			! 19
T_int_4:			int_handler			! 20
T_int_5:			int_handler			! 21
T_int_6:			int_handler			! 22
T_int_7:			int_handler			! 23
T_int_8:			int_handler			! 24
T_int_9:			int_handler			! 25
T_int_10:			int_handler			! 26
T_int_11:			int_handler			! 27
T_int_12:			int_handler			! 28
T_int_13:			int_handler			! 29
T_int_14:			INT14_HANDLER			! 30
T_int_15:			INT15_HANDLER			! 31

T_rferr:                        TRAP(RFE_HANDLER)               ! 32
T_iaerr:			IAER_HANDLER			! 33
                                TRAP(unimplemented_trap)
                                TRAP(unimplemented_trap)
T_cp_disabled:                  TRAP(CPDIS_HANDLER)             ! 36
                                TRAP(unimplemented_trap)
                                TRAP(unimplemented_trap)
                                TRAP(unimplemented_trap)
T_cp_exception:                 TRAP(CPX_HANDLER)               ! 40
T_daerr:                        DAER_HANDLER			! 41

				! unused hardware trap vectors    42 - 127

				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)
				TRAP(unimplemented_trap)

software_traps:							! 128 - 255

				TRAP(SWTRAP_0)
				TRAP(SWTRAP_1)
				TRAP(SWTRAP_2)
				TRAP(SWTRAP_3)
				TRAP(other_swtraps)
				TRAP(other_swtraps)
				TRAP(other_swtraps)
				TRAP(other_swtraps)
				TRAP(other_swtraps)
				TRAP(other_swtraps)
				TRAP(other_swtraps)
				TRAP(other_swtraps)
				TRAP(other_swtraps)
				TRAP(other_swtraps)
				TRAP(other_swtraps)
				TRAP(other_swtraps)
				TRAP(other_swtraps)
				TRAP(other_swtraps)
				TRAP(other_swtraps)
				TRAP(other_swtraps)
				TRAP(other_swtraps)
				TRAP(other_swtraps)
				TRAP(other_swtraps)
				TRAP(other_swtraps)
				TRAP(other_swtraps)
				TRAP(other_swtraps)
				TRAP(other_swtraps)
				TRAP(other_swtraps)
				TRAP(other_swtraps)
				TRAP(other_swtraps)
				TRAP(other_swtraps)
				TRAP(other_swtraps)
				TRAP(other_swtraps)
				TRAP(other_swtraps)
				TRAP(other_swtraps)
				TRAP(other_swtraps)
				TRAP(other_swtraps)
				TRAP(other_swtraps)