379 lines
10 KiB
ArmAsm
379 lines
10 KiB
ArmAsm
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#
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# $NetBSD: netbsd060sp.S,v 1.1 1996/05/15 21:06:24 is Exp $
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#
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#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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# MOTOROLA MICROPROCESSOR & MEMORY TECHNOLOGY GROUP
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# M68000 Hi-Performance Microprocessor Division
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# M68060 Software Package Production Release
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#
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# M68060 Software Package Copyright (C) 1993, 1994, 1995, 1996 Motorola Inc.
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# All rights reserved.
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#
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# THE SOFTWARE is provided on an "AS IS" basis and without warranty.
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# To the maximum extent permitted by applicable law,
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# MOTOROLA DISCLAIMS ALL WARRANTIES WHETHER EXPRESS OR IMPLIED,
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# INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS
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# FOR A PARTICULAR PURPOSE and any warranty against infringement with
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# regard to the SOFTWARE (INCLUDING ANY MODIFIED VERSIONS THEREOF)
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# and any accompanying written materials.
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#
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# To the maximum extent permitted by applicable law,
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# IN NO EVENT SHALL MOTOROLA BE LIABLE FOR ANY DAMAGES WHATSOEVER
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# (INCLUDING WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS,
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# BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR OTHER PECUNIARY LOSS)
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# ARISING OF THE USE OR INABILITY TO USE THE SOFTWARE.
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#
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# Motorola assumes no responsibility for the maintenance and support
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# of the SOFTWARE.
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#
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# You are hereby granted a copyright license to use, modify, and distribute the
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# SOFTWARE so long as this entire notice is retained without alteration
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# in any modified and/or redistributed versions, and that such modified
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# versions are clearly identified as such.
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# No licenses are granted by implication, estoppel or otherwise under any
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# patents or trademarks of Motorola, Inc.
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#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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#
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# Derived from:
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# os.s
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#
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# This file contains:
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# - example "Call-Out"s required by both the ISP and FPSP.
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#
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#
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# make the copyright notice appear in the binary:
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#
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.include "copyright.S"
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#################################
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# EXAMPLE CALL-OUTS #
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# #
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# _060_dmem_write() #
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# _060_dmem_read() #
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# _060_imem_read() #
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# _060_dmem_read_byte() #
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# _060_dmem_read_word() #
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# _060_dmem_read_long() #
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# _060_imem_read_word() #
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# _060_imem_read_long() #
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# _060_dmem_write_byte() #
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# _060_dmem_write_word() #
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# _060_dmem_write_long() #
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# #
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# _060_real_trace() #
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# _060_real_access() #
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#################################
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#
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# Each IO routine checks to see if the memory write/read is to/from user
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# or supervisor application space. The examples below use simple "move"
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# instructions for supervisor mode applications and call _copyin()/_copyout()
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# for user mode applications.
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# When installing the 060SP, the _copyin()/_copyout() equivalents for a
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# given operating system should be substituted.
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#
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# The addresses within the 060SP are guaranteed to be on the stack.
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# The result is that Unix processes are allowed to sleep as a consequence
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# of a page fault during a _copyout.
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#
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#
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# _060_dmem_write():
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#
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# Writes to data memory while in supervisor mode.
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#
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# INPUTS:
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# a0 - supervisor source address
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# a1 - user destination address
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# d0 - number of bytes to write
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# a6@(0x4),bit5 - 1 = supervisor mode, 0 = user mode
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# OUTPUTS:
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# d1 - 0 = success, !0 = failure
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#
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.global _060_dmem_write
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_060_dmem_write:
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btst #0x5,a6@(0x4) |# check for supervisor state
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beqs user_write
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super_write:
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moveb a0@+,a1@+ |# copy 1 byte
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subql #0x1,d0 |# decr byte counter
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bnes super_write |# quit if ctr = 0
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clrl d1 |# return success
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rts
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user_write:
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movel d0,sp@- |# pass: counter
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movel a1,sp@- |# pass: user dst
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movel a0,sp@- |# pass: supervisor src
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bsrl _copyout |# write byte to user mem
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movel d0,d1 |# return success
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addl #0xc,sp |# clear 3 lw params
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rts
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#
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# _060_imem_read(), _060_dmem_read():
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#
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# Reads from data/instruction memory while in supervisor mode.
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#
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# INPUTS:
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# a0 - user source address
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# a1 - supervisor destination address
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# d0 - number of bytes to read
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# a6@(0x4),bit5 - 1 = supervisor mode, 0 = user mode
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# OUTPUTS:
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# d1 - 0 = success, !0 = failure
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#
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.global _060_imem_read
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.global _060_dmem_read
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_060_imem_read:
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_060_dmem_read:
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btst #0x5,a6@(0x4) |# check for supervisor state
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beqs user_read
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super_read:
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moveb a0@+,a1@+ |# copy 1 byte
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subql #0x1,d0 |# decr byte counter
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bnes super_read |# quit if ctr = 0
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clrl d1 |# return success
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rts
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user_read:
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movel d0,sp@- |# pass: counter
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movel a1,sp@- |# pass: super dst
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movel a0,sp@- |# pass: user src
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bsrl _copyin |# read byte from user mem
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movel d0,d1 |# return success
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addl #0xc,sp |# clear 3 lw params
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rts
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#
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# _060_dmem_read_byte():
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#
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# Read a data byte from user memory.
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#
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# INPUTS:
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# a0 - user source address
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# a6@(0x4),bit5 - 1 = supervisor mode, 0 = user mode
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# OUTPUTS:
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# d0 - data byte in d0
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# d1 - 0 = success, !0 = failure
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#
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.global _060_dmem_read_byte
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_060_dmem_read_byte:
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btst #0x5,a6@(0x4) |# check for supervisor state
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bnes dmrbs |# supervisor
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dmrbu:
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clrl sp@- |# clear space on stack for result
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movel #0x1,sp@- |# pass: # bytes to copy
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pea sp@(0x7) |# pass: dst addr (stack)
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movel a0,sp@- |# pass: src addr (user mem)
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bsrl _copyin |# "copy in" the data
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movel d0,d1 |# return success
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addl #0xc,sp |# delete params
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movel sp@+,d0 |# put answer in d0
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rts
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dmrbs:
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clrl d0 |# clear whole longword
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moveb a0@,d0 |# fetch super byte
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clrl d1 |# return success
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rts
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#
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# _060_imem_read_word():
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# Read an instruction word from user memory.
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#
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# _060_dmem_read_word():
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# Read a data word from user memory.
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#
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# INPUTS:
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# a0 - user source address
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# a6@(0x4),bit5 - 1 = supervisor mode, 0 = user mode
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# OUTPUTS:
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# d0 - data word in d0
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# d1 - 0 = success, !0 = failure
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#
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.global _060_imem_read_word
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.global _060_dmem_read_word
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_060_imem_read_word:
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_060_dmem_read_word:
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btst #0x5,a6@(0x4) |# check for supervisor state
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bnes dmrws |# supervisor
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dmrwu:
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clrl sp@- |# clear result space on stack
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movel #0x2,sp@- |# pass: # bytes to copy
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pea sp@(0x6) |# pass: dst addr (stack)
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movel a0,sp@- |# pass: src addr (user mem)
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bsrl _copyin |# "copy in" the data
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movel d0,d1 |# return success
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addl #0xc,sp |# delete params
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movel sp@+,d0 |# put answer in d0
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rts
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dmrws:
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clrl d0 |# clear whole longword
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movew a0@,d0 |# fetch super word
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clrl d1 |# return success
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rts
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#
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# _060_imem_read_long():
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# Read an instruction longword from user memory.
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#
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# _060_dmem_read_long():
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# Read an data longword from user memory.
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#
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#
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# INPUTS:
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# a0 - user source address
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# a6@(0x4),bit5 - 1 = supervisor mode, 0 = user mode
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# OUTPUTS:
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# d0 - data longword in d0
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# d1 - 0 = success, !0 = failure
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#
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.global _060_dmem_read_long
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.global _060_imem_read_long
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_060_imem_read_long:
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_060_dmem_read_long:
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btst #0x5,a6@(0x4) |# check for supervisor state
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bnes dmrls |# supervisor
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dmrlu:
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subql #0x4,sp |# clear result space on stack
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movel #0x4,sp@- |# pass: # bytes to copy
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pea sp@(0x4) |# pass: dst addr (stack)
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movel a0,sp@- |# pass: src addr (user mem)
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bsrl _copyin |# "copy in" the data
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movel d0,d1 |# return success
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addl #0xc,sp |# delete params
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movel sp@+,d0 |# put answer in d0
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rts
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dmrls:
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movel a0@,d0 |# fetch super longword
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clrl d1 |# return success
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rts
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#
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# _060_dmem_write_byte():
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#
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# Write a data byte to user memory.
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#
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# INPUTS:
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# a0 - user destination address
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# d0 - data byte in d0
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# a6@(0x4),bit5 - 1 = supervisor mode, 0 = user mode
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# OUTPUTS:
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# d1 - 0 = success, !0 = failure
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#
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.global _060_dmem_write_byte
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_060_dmem_write_byte:
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btst #0x5,a6@(0x4) |# check for supervisor state
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bnes dmwbs |# supervisor
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dmwbu:
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movel d0,sp@- |# put src on stack
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movel #0x1,sp@- |# pass: # bytes to copy
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movel a0,sp@- |# pass: dst addr (user mem)
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pea sp@(0xb) |# pass: src addr (stack)
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bsrl _copyout |# "copy out" the data
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movel d0,d1 |# return success
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addl #0x10,sp |# delete params + src
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rts
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dmwbs:
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moveb d0,a0@ |# store super byte
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clrl d1 |# return success
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rts
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#
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# _060_dmem_write_word():
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#
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# Write a data word to user memory.
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#
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# INPUTS:
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# a0 - user destination address
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# d0 - data word in d0
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# a6@(0x4),bit5 - 1 = supervisor mode, 0 = user mode
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# OUTPUTS:
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# d1 - 0 = success, !0 = failure
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#
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.global _060_dmem_write_word
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_060_dmem_write_word:
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btst #0x5,a6@(0x4) |# check for supervisor state
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bnes dmwws |# supervisor
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dmwwu:
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movel d0,sp@- |# put src on stack
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movel #0x2,sp@- |# pass: # bytes to copy
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movel a0,sp@- |# pass: dst addr (user mem)
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pea sp@(0xa) |# pass: src addr (stack)
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bsrl _copyout |# "copy out" the data
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movel d0,d1 |# return success
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addl #0x10,sp |# delete params + src
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rts
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dmwws:
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movew d0,a0@ |# store super word
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clrl d1 |# return success
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rts
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#
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# _060_dmem_write_long():
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#
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# Write a data longword to user memory.
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#
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# INPUTS:
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# a0 - user destination address
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# d0 - data longword in d0
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# a6@(0x4),bit5 - 1 = supervisor mode, 0 = user mode
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# OUTPUTS:
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# d1 - 0 = success, !0 = failure
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#
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.global _060_dmem_write_long
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_060_dmem_write_long:
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btst #0x5,a6@(0x4) |# check for supervisor state
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bnes dmwls |# supervisor
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dmwlu:
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movel d0,sp@- |# put src on stack
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movel #0x4,sp@- |# pass: # bytes to copy
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movel a0,sp@- |# pass: dst addr (user mem)
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pea sp@(0x8) |# pass: src addr (stack)
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bsrl _copyout |# "copy out" the data
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movel d0,d1 |# return success
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addl #0x10,sp |# delete params + src
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rts
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dmwls:
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movel d0,a0@ |# store super longword
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clrl d1 |# return success
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rts
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############################################################################
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#
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# _060_real_trace():
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#
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# This is the exit point for the 060FPSP when an instruction is being traced
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# and there are no other higher priority exceptions pending for this instruction
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# or they have already been processed.
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#
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# The sample code below simply executes an "rte".
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#
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.global _060_real_trace
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_060_real_trace:
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rte
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#
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# _060_real_access():
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|
|
#
|
||
|
|
# 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"
|