# # $NetBSD: netbsd.S,v 1.1 1996/05/15 21:06:24 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: # os.s # # This file contains: # - example "Call-Out"s required by both the ISP and FPSP. # # # make the copyright notice appear in the binary: # .include "copyright.S" ################################# # EXAMPLE CALL-OUTS # # # # _060_dmem_write() # # _060_dmem_read() # # _060_imem_read() # # _060_dmem_read_byte() # # _060_dmem_read_word() # # _060_dmem_read_long() # # _060_imem_read_word() # # _060_imem_read_long() # # _060_dmem_write_byte() # # _060_dmem_write_word() # # _060_dmem_write_long() # # # # _060_real_trace() # # _060_real_access() # ################################# # # Each IO routine checks to see if the memory write/read is to/from user # or supervisor application space. The examples below use simple "move" # instructions for supervisor mode applications and call _copyin()/_copyout() # for user mode applications. # When installing the 060SP, the _copyin()/_copyout() equivalents for a # given operating system should be substituted. # # The addresses within the 060SP are guaranteed to be on the stack. # The result is that Unix processes are allowed to sleep as a consequence # of a page fault during a _copyout. # # # _060_dmem_write(): # # Writes to data memory while in supervisor mode. # # INPUTS: # a0 - supervisor source address # a1 - user destination address # d0 - number of bytes to write # a6@(0x4),bit5 - 1 = supervisor mode, 0 = user mode # OUTPUTS: # d1 - 0 = success, !0 = failure # .global _060_dmem_write _060_dmem_write: btst #0x5,a6@(0x4) |# check for supervisor state beqs user_write super_write: moveb a0@+,a1@+ |# copy 1 byte subql #0x1,d0 |# decr byte counter bnes super_write |# quit if ctr = 0 clrl d1 |# return success rts user_write: movel d0,sp@- |# pass: counter movel a1,sp@- |# pass: user dst movel a0,sp@- |# pass: supervisor src bsrl _copyout |# write byte to user mem movel d0,d1 |# return success addl #0xc,sp |# clear 3 lw params rts # # _060_imem_read(), _060_dmem_read(): # # Reads from data/instruction memory while in supervisor mode. # # INPUTS: # a0 - user source address # a1 - supervisor destination address # d0 - number of bytes to read # a6@(0x4),bit5 - 1 = supervisor mode, 0 = user mode # OUTPUTS: # d1 - 0 = success, !0 = failure # .global _060_imem_read .global _060_dmem_read _060_imem_read: _060_dmem_read: btst #0x5,a6@(0x4) |# check for supervisor state beqs user_read super_read: moveb a0@+,a1@+ |# copy 1 byte subql #0x1,d0 |# decr byte counter bnes super_read |# quit if ctr = 0 clrl d1 |# return success rts user_read: movel d0,sp@- |# pass: counter movel a1,sp@- |# pass: super dst movel a0,sp@- |# pass: user src bsrl _copyin |# read byte from user mem movel d0,d1 |# return success addl #0xc,sp |# clear 3 lw params rts # # _060_dmem_read_byte(): # # Read a data byte from user memory. # # INPUTS: # a0 - user source address # a6@(0x4),bit5 - 1 = supervisor mode, 0 = user mode # OUTPUTS: # d0 - data byte in d0 # d1 - 0 = success, !0 = failure # .global _060_dmem_read_byte _060_dmem_read_byte: btst #0x5,a6@(0x4) |# check for supervisor state bnes dmrbs |# supervisor dmrbu: clrl sp@- |# clear space on stack for result movel #0x1,sp@- |# pass: # bytes to copy pea sp@(0x7) |# pass: dst addr (stack) movel a0,sp@- |# pass: src addr (user mem) bsrl _copyin |# "copy in" the data movel d0,d1 |# return success addl #0xc,sp |# delete params movel sp@+,d0 |# put answer in d0 rts dmrbs: clrl d0 |# clear whole longword moveb a0@,d0 |# fetch super byte clrl d1 |# return success rts # # _060_imem_read_word(): # Read an instruction word from user memory. # # _060_dmem_read_word(): # Read a data word from user memory. # # INPUTS: # a0 - user source address # a6@(0x4),bit5 - 1 = supervisor mode, 0 = user mode # OUTPUTS: # d0 - data word in d0 # d1 - 0 = success, !0 = failure # .global _060_imem_read_word .global _060_dmem_read_word _060_imem_read_word: _060_dmem_read_word: btst #0x5,a6@(0x4) |# check for supervisor state bnes dmrws |# supervisor dmrwu: clrl sp@- |# clear result space on stack movel #0x2,sp@- |# pass: # bytes to copy pea sp@(0x6) |# pass: dst addr (stack) movel a0,sp@- |# pass: src addr (user mem) bsrl _copyin |# "copy in" the data movel d0,d1 |# return success addl #0xc,sp |# delete params movel sp@+,d0 |# put answer in d0 rts dmrws: clrl d0 |# clear whole longword movew a0@,d0 |# fetch super word clrl d1 |# return success rts # # _060_imem_read_long(): # Read an instruction longword from user memory. # # _060_dmem_read_long(): # Read an data longword from user memory. # # # INPUTS: # a0 - user source address # a6@(0x4),bit5 - 1 = supervisor mode, 0 = user mode # OUTPUTS: # d0 - data longword in d0 # d1 - 0 = success, !0 = failure # .global _060_dmem_read_long .global _060_imem_read_long _060_imem_read_long: _060_dmem_read_long: btst #0x5,a6@(0x4) |# check for supervisor state bnes dmrls |# supervisor dmrlu: subql #0x4,sp |# clear result space on stack movel #0x4,sp@- |# pass: # bytes to copy pea sp@(0x4) |# pass: dst addr (stack) movel a0,sp@- |# pass: src addr (user mem) bsrl _copyin |# "copy in" the data movel d0,d1 |# return success addl #0xc,sp |# delete params movel sp@+,d0 |# put answer in d0 rts dmrls: movel a0@,d0 |# fetch super longword clrl d1 |# return success rts # # _060_dmem_write_byte(): # # Write a data byte to user memory. # # INPUTS: # a0 - user destination address # d0 - data byte in d0 # a6@(0x4),bit5 - 1 = supervisor mode, 0 = user mode # OUTPUTS: # d1 - 0 = success, !0 = failure # .global _060_dmem_write_byte _060_dmem_write_byte: btst #0x5,a6@(0x4) |# check for supervisor state bnes dmwbs |# supervisor dmwbu: movel d0,sp@- |# put src on stack movel #0x1,sp@- |# pass: # bytes to copy movel a0,sp@- |# pass: dst addr (user mem) pea sp@(0xb) |# pass: src addr (stack) bsrl _copyout |# "copy out" the data movel d0,d1 |# return success addl #0x10,sp |# delete params + src rts dmwbs: moveb d0,a0@ |# store super byte clrl d1 |# return success rts # # _060_dmem_write_word(): # # Write a data word to user memory. # # INPUTS: # a0 - user destination address # d0 - data word in d0 # a6@(0x4),bit5 - 1 = supervisor mode, 0 = user mode # OUTPUTS: # d1 - 0 = success, !0 = failure # .global _060_dmem_write_word _060_dmem_write_word: btst #0x5,a6@(0x4) |# check for supervisor state bnes dmwws |# supervisor dmwwu: movel d0,sp@- |# put src on stack movel #0x2,sp@- |# pass: # bytes to copy movel a0,sp@- |# pass: dst addr (user mem) pea sp@(0xa) |# pass: src addr (stack) bsrl _copyout |# "copy out" the data movel d0,d1 |# return success addl #0x10,sp |# delete params + src rts dmwws: movew d0,a0@ |# store super word clrl d1 |# return success rts # # _060_dmem_write_long(): # # Write a data longword to user memory. # # INPUTS: # a0 - user destination address # d0 - data longword in d0 # a6@(0x4),bit5 - 1 = supervisor mode, 0 = user mode # OUTPUTS: # d1 - 0 = success, !0 = failure # .global _060_dmem_write_long _060_dmem_write_long: btst #0x5,a6@(0x4) |# check for supervisor state bnes dmwls |# supervisor dmwlu: movel d0,sp@- |# put src on stack movel #0x4,sp@- |# pass: # bytes to copy movel a0,sp@- |# pass: dst addr (user mem) pea sp@(0x8) |# pass: src addr (stack) bsrl _copyout |# "copy out" the data movel d0,d1 |# return success addl #0x10,sp |# delete params + src rts dmwls: movel d0,a0@ |# store super longword clrl d1 |# return success rts ############################################################################ # # _060_real_trace(): # # This is the exit point for the 060FPSP when an instruction is being traced # and there are no other higher priority exceptions pending for this instruction # or they have already been processed. # # The sample code below simply executes an "rte". # .global _060_real_trace _060_real_trace: rte # # _060_real_access(): # # This is the exit point for the 060FPSP when an access error exception # is encountered. The routine below should point to the operating system # handler for access error exceptions. The exception stack frame is an # 8-word access error frame. # # The sample routine below simply executes an "rte" instruction which # is most likely the incorrect thing to do and could put the system # into an infinite loop. # .global _060_real_access _060_real_access: .globl _buserr jmp _buserr .include "inetbsd.S" .include "fnetbsd.S"