# # $OpenBSD: fnetbsd.S,v 1.2 1996/05/30 22:14:05 niklas Exp $ # $NetBSD: fnetbsd.S,v 1.2 1996/05/15 21:16:45 is Exp $ # #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ # MOTOROLA MICROPROCESSOR & MEMORY TECHNOLOGY GROUP # M68000 Hi-Performance Microprocessor Division # M68060 Software Package Production Release # # M68060 Software Package Copyright (C) 1993, 1994, 1995, 1996 Motorola Inc. # All rights reserved. # # THE SOFTWARE is provided on an "AS IS" basis and without warranty. # To the maximum extent permitted by applicable law, # MOTOROLA DISCLAIMS ALL WARRANTIES WHETHER EXPRESS OR IMPLIED, # INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS # FOR A PARTICULAR PURPOSE and any warranty against infringement with # regard to the SOFTWARE (INCLUDING ANY MODIFIED VERSIONS THEREOF) # and any accompanying written materials. # # To the maximum extent permitted by applicable law, # IN NO EVENT SHALL MOTOROLA BE LIABLE FOR ANY DAMAGES WHATSOEVER # (INCLUDING WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS, # BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR OTHER PECUNIARY LOSS) # ARISING OF THE USE OR INABILITY TO USE THE SOFTWARE. # # Motorola assumes no responsibility for the maintenance and support # of the SOFTWARE. # # You are hereby granted a copyright license to use, modify, and distribute the # SOFTWARE so long as this entire notice is retained without alteration # in any modified and/or redistributed versions, and that such modified # versions are clearly identified as such. # No licenses are granted by implication, estoppel or otherwise under any # patents or trademarks of Motorola, Inc. #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ # # Derived from: # fskeleton.s # # This file contains: # (1) example "Call-out"s # (2) example package entry code # (3) example "Call-out" table # ################################# # (1) EXAMPLE CALL-OUTS # # # # _060_fpsp_done() # # _060_real_ovfl() # # _060_real_unfl() # # _060_real_operr() # # _060_real_snan() # # _060_real_dz() # # _060_real_inex() # # _060_real_bsun() # # _060_real_fline() # # _060_real_fpu_disabled() # # _060_real_trap() # ################################# # # _060_fpsp_done(): # # This is the main exit point for the 68060 Floating-Point # Software Package. For a normal exit, all 060FPSP routines call this # routine. The operating system can do system dependent clean-up or # simply execute an "rte" as with the sample code below. # .global _060_fpsp_done _060_fpsp_done: rte # # _060_real_ovfl(): # # This is the exit point for the 060FPSP when an enabled overflow exception # is present. The routine below should point to the operating system handler # for enabled overflow conditions. The exception stack frame is an overflow # stack frame. The FP state frame holds the EXCEPTIONAL OPERAND. # # The sample routine below simply clears the exception status bit and # does an "rte". # .global _060_real_ovfl _060_real_ovfl: fsave sp@- movew #0x6000,sp@(0x2) frestore sp@+ jmp _fpfault # # _060_real_unfl(): # # This is the exit point for the 060FPSP when an enabled underflow exception # is present. The routine below should point to the operating system handler # for enabled underflow conditions. The exception stack frame is an underflow # stack frame. The FP state frame holds the EXCEPTIONAL OPERAND. # # The sample routine below simply clears the exception status bit and # does an "rte". # .global _060_real_unfl _060_real_unfl: fsave sp@- movew #0x6000,sp@(0x2) frestore sp@+ jmp _fpfault # # _060_real_operr(): # # This is the exit point for the 060FPSP when an enabled operand error exception # is present. The routine below should point to the operating system handler # for enabled operand error exceptions. The exception stack frame is an operand error # stack frame. The FP state frame holds the source operand of the faulting # instruction. # # The sample routine below simply clears the exception status bit and # does an "rte". # .global _060_real_operr _060_real_operr: fsave sp@- movew #0x6000,sp@(0x2) frestore sp@+ jmp _fpfault # # _060_real_snan(): # # This is the exit point for the 060FPSP when an enabled signalling NaN exception # is present. The routine below should point to the operating system handler # for enabled signalling NaN exceptions. The exception stack frame is a signalling NaN # stack frame. The FP state frame holds the source operand of the faulting # instruction. # # The sample routine below simply clears the exception status bit and # does an "rte". # .global _060_real_snan _060_real_snan: fsave sp@- movew #0x6000,sp@(0x2) frestore sp@+ jmp _fpfault # # _060_real_dz(): # # This is the exit point for the 060FPSP when an enabled divide-by-zero exception # is present. The routine below should point to the operating system handler # for enabled divide-by-zero exceptions. The exception stack frame is a divide-by-zero # stack frame. The FP state frame holds the source operand of the faulting # instruction. # # The sample routine below simply clears the exception status bit and # does an "rte". # .global _060_real_dz _060_real_dz: fsave sp@- movew #0x6000,sp@(0x2) frestore sp@+ jmp _fpfault # # _060_real_inex(): # # This is the exit point for the 060FPSP when an enabled inexact exception # is present. The routine below should point to the operating system handler # for enabled inexact exceptions. The exception stack frame is an inexact # stack frame. The FP state frame holds the source operand of the faulting # instruction. # # The sample routine below simply clears the exception status bit and # does an "rte". # .global _060_real_inex _060_real_inex: fsave sp@- movew #0x6000,sp@(0x2) frestore sp@+ jmp _fpfault # # _060_real_bsun(): # # This is the exit point for the 060FPSP when an enabled bsun exception # is present. The routine below should point to the operating system handler # for enabled bsun exceptions. The exception stack frame is a bsun # stack frame. # # The sample routine below clears the exception status bit, clears the NaN # bit in the FPSR, and does an "rte". The instruction that caused the # bsun will now be re-executed but with the NaN FPSR bit cleared. # .global _060_real_bsun _060_real_bsun: fsave sp@- fmovel fpsr,sp@- andib #0xfe,sp@ fmovel sp@+,fpsr addl #0xc,sp jmp _fpfault # # _060_real_fline(): # # This is the exit point for the 060FPSP when an F-Line Illegal exception is # encountered. Three different types of exceptions can enter the F-Line exception # vector number 11: FP Unimplemented Instructions, FP implemented instructions when # the FPU is disabled, and F-Line Illegal instructions. The 060FPSP module # _fpsp_fline() distinguishes between the three and acts appropriately. F-Line # Illegals branch here. # .global _060_real_fline _060_real_fline: jmp _fpfault # # _060_real_fpu_disabled(): # # This is the exit point for the 060FPSP when an FPU disabled exception is # encountered. Three different types of exceptions can enter the F-Line exception # vector number 11: FP Unimplemented Instructions, FP implemented instructions when # the FPU is disabled, and F-Line Illegal instructions. The 060FPSP module # _fpsp_fline() distinguishes between the three and acts appropriately. FPU disabled # exceptions branch here. # # The sample code below enables the FPU, sets the PC field in the exception stack # frame to the PC of the instruction causing the exception, and does an "rte". # The execution of the instruction then proceeds with an enabled floating-point # unit. # .global _060_real_fpu_disabled _060_real_fpu_disabled: movel d0,sp@- |# enabled the fpu .short 0x4e7a,0x0808 |* movec.l pcr,d0 bclr #0x1,d0 .short 0x4e7b,0x0808 |* movec.l d0,pcr movel sp@+,d0 movel sp@(0xc),sp@(0x2) |# set "Current PC" rte # # _060_real_trap(): # # This is the exit point for the 060FPSP when an emulated "ftrapcc" instruction # discovers that the trap condition is true and it should branch to the operating # system handler for the trap exception vector number 7. # # The sample code below simply executes an "rte". # .global _060_real_trap _060_real_trap: rte ############################################################################# ################################## # (2) EXAMPLE PACKAGE ENTRY CODE # ################################## .global _060_fpsp_snan _060_fpsp_snan: bral _FP_CALL_TOP+0x80+0x00 .global _060_fpsp_operr _060_fpsp_operr: bral _FP_CALL_TOP+0x80+0x08 .global _060_fpsp_ovfl _060_fpsp_ovfl: bral _FP_CALL_TOP+0x80+0x10 .global _060_fpsp_unfl _060_fpsp_unfl: bral _FP_CALL_TOP+0x80+0x18 .global _060_fpsp_dz _060_fpsp_dz: bral _FP_CALL_TOP+0x80+0x20 .global _060_fpsp_inex _060_fpsp_inex: bral _FP_CALL_TOP+0x80+0x28 .global _060_fpsp_fline _060_fpsp_fline: bral _FP_CALL_TOP+0x80+0x30 .global _060_fpsp_unsupp _060_fpsp_unsupp: bral _FP_CALL_TOP+0x80+0x38 .global _060_fpsp_effadd _060_fpsp_effadd: bral _FP_CALL_TOP+0x80+0x40 ############################################################################# ################################ # (3) EXAMPLE CALL-OUT SECTION # ################################ # The size of this section MUST be 128 bytes!!! .global _FP_CALL_TOP _FP_CALL_TOP: .long _060_real_bsun-_FP_CALL_TOP .long _060_real_snan-_FP_CALL_TOP .long _060_real_operr-_FP_CALL_TOP .long _060_real_ovfl-_FP_CALL_TOP .long _060_real_unfl-_FP_CALL_TOP .long _060_real_dz-_FP_CALL_TOP .long _060_real_inex-_FP_CALL_TOP .long _060_real_fline-_FP_CALL_TOP .long _060_real_fpu_disabled-_FP_CALL_TOP .long _060_real_trap-_FP_CALL_TOP .long _060_real_trace-_FP_CALL_TOP .long _060_real_access-_FP_CALL_TOP .long _060_fpsp_done-_FP_CALL_TOP .long 0x00000000,0x00000000,0x00000000 .long _060_imem_read-_FP_CALL_TOP .long _060_dmem_read-_FP_CALL_TOP .long _060_dmem_write-_FP_CALL_TOP .long _060_imem_read_word-_FP_CALL_TOP .long _060_imem_read_long-_FP_CALL_TOP .long _060_dmem_read_byte-_FP_CALL_TOP .long _060_dmem_read_word-_FP_CALL_TOP .long _060_dmem_read_long-_FP_CALL_TOP .long _060_dmem_write_byte-_FP_CALL_TOP .long _060_dmem_write_word-_FP_CALL_TOP .long _060_dmem_write_long-_FP_CALL_TOP .long 0x00000000 .long 0x00000000,0x00000000,0x00000000,0x00000000 ############################################################################# # 060 FPSP KERNEL PACKAGE NEEDS TO GO HERE!!! .include "fpsp.S"