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jcastillo |
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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
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|Production Release P1.00 -- October 10, 1994
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|M68060 Software Package Copyright © 1993, 1994 Motorola Inc. All rights reserved.
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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 FOR A PARTICULAR PURPOSE
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|and any warranty against infringement with regard to the SOFTWARE
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|(INCLUDING ANY MODIFIED VERSIONS THEREOF) and any accompanying written materials.
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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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|Motorola assumes no responsibility for the maintenance and support of the SOFTWARE.
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|You are hereby granted a copyright license to use, modify, and distribute the SOFTWARE
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|so long as this entire notice is retained without alteration in any modified and/or
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|redistributed versions, and that such modified versions are clearly identified as such.
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|No licenses are granted by implication, estoppel or otherwise under any patents
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|or trademarks of Motorola, Inc.
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|~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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| os.s
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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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| 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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| 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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| 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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| _060_dmem_write():
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| Writes to data memory while in supervisor mode.
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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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| 0x4(%a6),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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.global _060_dmem_write
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_060_dmem_write:
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btst #0x5,0x4(%a6) | check for supervisor state
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beqs user_write
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super_write:
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move.b (%a0)+,(%a1)+ | copy 1 byte
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subq.l #0x1,%d0 | decr byte counter
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bnes super_write | quit if ctr = 0
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clr.l %d1 | return success
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rts
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user_write:
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move.l %d0,-(%sp) | pass: counter
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move.l %a1,-(%sp) | pass: user dst
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move.l %a0,-(%sp) | pass: supervisor src
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bsr.l _copyout | write byte to user mem
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move.l %d0,%d1 | return success
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add.l #0xc, %sp | clear 3 lw params
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rts
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| _060_imem_read(), _060_dmem_read():
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| Reads from data/instruction memory while in supervisor mode.
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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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| 0x4(%a6),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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.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 #0x5,0x4(%a6) | check for supervisor state
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beqs user_read
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super_read:
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move.b (%a0)+,(%a1)+ | copy 1 byte
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subq.l #0x1,%d0 | decr byte counter
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bnes super_read | quit if ctr = 0
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clr.l %d1 | return success
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rts
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user_read:
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move.l %d0,-(%sp) | pass: counter
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move.l %a1,-(%sp) | pass: super dst
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move.l %a0,-(%sp) | pass: user src
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bsr.l _copyin | read byte from user mem
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move.l %d0,%d1 | return success
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add.l #0xc,%sp | clear 3 lw params
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rts
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| _060_dmem_read_byte():
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| Read a data byte from user memory.
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| INPUTS:
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| a0 - user source address
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| 0x4(%a6),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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.global _060_dmem_read_byte
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_060_dmem_read_byte:
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btst #0x5,0x4(%a6) | check for supervisor state
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bnes dmrbs | supervisor
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dmrbu: clr.l -(%sp) | clear space on stack for result
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move.l #0x1,-(%sp) | pass: # bytes to copy
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pea 0x7(%sp) | pass: dst addr (stack)
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move.l %a0,-(%sp) | pass: src addr (user mem)
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bsr.l _copyin | "copy in" the data
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move.l %d0,%d1 | return success
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add.l #0xc,%sp | delete params
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move.l (%sp)+,%d0 | put answer in d0
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rts
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dmrbs: clr.l %d0 | clear whole longword
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move.b (%a0),%d0 | fetch super byte
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clr.l %d1 | return success
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rts
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| _060_dmem_read_word():
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| Read a data word from user memory.
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| INPUTS:
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| a0 - user source address
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| 0x4(%a6),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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.global _060_dmem_read_word
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_060_dmem_read_word:
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btst #0x5,0x4(%a6) | check for supervisor state
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bnes dmrws | supervisor
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dmrwu: clr.l -(%sp) | clear space on stack for result
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move.l #0x2,-(%sp) | pass: # bytes to copy
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pea 0x6(%sp) | pass: dst addr (stack)
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move.l %a0,-(%sp) | pass: src addr (user mem)
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bsr.l _copyin | "copy in" the data
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move.l %d0,%d1 | return success
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add.l #0xc,%sp | delete params
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move.l (%sp)+,%d0 | put answer in d0
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rts
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dmrws: clr.l %d0 | clear whole longword
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move.w (%a0), %d0 | fetch super word
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clr.l %d1 | return success
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rts
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| _060_dmem_read_long():
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| INPUTS:
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| a0 - user source address
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| 0x4(%a6),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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.global _060_dmem_read_long
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_060_dmem_read_long:
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btst #0x5,0x4(%a6) | check for supervisor state
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bnes dmrls | supervisor
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dmrlu: subq.l #0x4,%sp | clear space on stack for result
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move.l #0x4,-(%sp) | pass: # bytes to copy
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pea 0x4(%sp) | pass: dst addr (stack)
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move.l %a0,-(%sp) | pass: src addr (user mem)
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bsr.l _copyin | "copy in" the data
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move.l %d0,%d1 | return success
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add.l #0xc,%sp | delete params
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move.l (%sp)+,%d0 | put answer in d0
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rts
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dmrls: move.l (%a0),%d0 | fetch super longword
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clr.l %d1 | return success
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rts
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| _060_dmem_write_byte():
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| Write a data byte to user memory.
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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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| 0x4(%a6),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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.global _060_dmem_write_byte
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_060_dmem_write_byte:
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btst #0x5,0x4(%a6) | check for supervisor state
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bnes dmwbs | supervisor
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dmwbu: move.l %d0,-(%sp) | put src on stack
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move.l #0x1,-(%sp) | pass: # bytes to copy
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move.l %a0,-(%sp) | pass: dst addr (user mem)
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pea 0xb(%sp) | pass: src addr (stack)
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bsr.l _copyout | "copy out" the data
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move.l %d0,%d1 | return success
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add.l #0x10,%sp | delete params + src
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rts
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dmwbs: move.b %d0,(%a0) | store super byte
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clr.l %d1 | return success
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rts
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| _060_dmem_write_word():
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| Write a data word to user memory.
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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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| 0x4(%a6),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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.global _060_dmem_write_word
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_060_dmem_write_word:
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btst #0x5,0x4(%a6) | check for supervisor state
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bnes dmwws | supervisor
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dmwwu: move.l %d0,-(%sp) | put src on stack
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move.l #0x2,-(%sp) | pass: # bytes to copy
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move.l %a0,-(%sp) | pass: dst addr (user mem)
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pea 0xa(%sp) | pass: src addr (stack)
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bsr.l _copyout | "copy out" the data
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move.l %d0,%d1 | return success
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add.l #0x10,%sp | delete params + src
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rts
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dmwws: move.w %d0,(%a0) | store super word
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clr.l %d1 | return success
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rts
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| _060_dmem_write_long():
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| 281 |
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| 282 |
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| Write a data longword to user memory.
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| 283 |
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| 284 |
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| INPUTS:
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| 285 |
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| a0 - user destination address
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| 286 |
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| d0 - data longword in d0
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| 287 |
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| 0x4(%a6),bit5 - 1 = supervisor mode, 0 = user mode
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| 288 |
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| OUTPUTS:
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| 289 |
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| d1 - 0 = success, !0 = failure
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| 290 |
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| 291 |
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.global _060_dmem_write_long
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_060_dmem_write_long:
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btst #0x5,0x4(%a6) | check for supervisor state
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| 294 |
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bnes dmwls | supervisor
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| 295 |
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dmwlu: move.l %d0,-(%sp) | put src on stack
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move.l #0x4,-(%sp) | pass: # bytes to copy
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| 297 |
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move.l %a0,-(%sp) | pass: dst addr (user mem)
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| 298 |
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pea 0x8(%sp) | pass: src addr (stack)
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| 299 |
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bsr.l _copyout | "copy out" the data
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| 300 |
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move.l %d0,%d1 | return success
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| 301 |
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add.l #0x10,%sp | delete params + src
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| 302 |
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rts
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dmwls: move.l %d0,(%a0) | store super longword
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| 304 |
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clr.l %d1 | return success
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| 305 |
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rts
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| 306 |
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| 307 |
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| 308 |
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| _060_imem_read_word():
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| 309 |
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|
| 310 |
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| Read an instruction word from user memory.
|
| 311 |
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| 312 |
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| INPUTS:
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| 313 |
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| a0 - user source address
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| 314 |
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| 0x4(%a6),bit5 - 1 = supervisor mode, 0 = user mode
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| 315 |
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| OUTPUTS:
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| 316 |
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| d0 - instruction word in d0
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| 317 |
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| d1 - 0 = success, !0 = failure
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| 318 |
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| 319 |
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.global _060_imem_read_word
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| 320 |
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_060_imem_read_word:
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| 321 |
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btst #0x5,0x4(%a6) | check for supervisor state
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| 322 |
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|
bnes imrws | supervisor
|
| 323 |
|
|
imrwu: clr.l -(%sp) | clear space on stack for result
|
| 324 |
|
|
move.l #0x2,-(%sp) | pass: # bytes to copy
|
| 325 |
|
|
pea 0x6(%sp) | pass: dst addr (stack)
|
| 326 |
|
|
move.l %a0,-(%sp) | pass: src addr (user mem)
|
| 327 |
|
|
bsr.l _copyin | "copy in" the data
|
| 328 |
|
|
move.l %d0,%d1 | return success
|
| 329 |
|
|
add.l #0xc,%sp | delete params
|
| 330 |
|
|
move.l (%sp)+,%d0 | put answer in d0
|
| 331 |
|
|
rts
|
| 332 |
|
|
imrws: move.w (%a0),%d0 | fetch super word
|
| 333 |
|
|
clr.l %d1 | return success
|
| 334 |
|
|
rts
|
| 335 |
|
|
|
| 336 |
|
|
|
|
| 337 |
|
|
| _060_imem_read_long():
|
| 338 |
|
|
|
|
| 339 |
|
|
| Read an instruction longword from user memory.
|
| 340 |
|
|
|
|
| 341 |
|
|
| INPUTS:
|
| 342 |
|
|
| a0 - user source address
|
| 343 |
|
|
| 0x4(%a6),bit5 - 1 = supervisor mode, 0 = user mode
|
| 344 |
|
|
| OUTPUTS:
|
| 345 |
|
|
| d0 - instruction longword in d0
|
| 346 |
|
|
| d1 - 0 = success, !0 = failure
|
| 347 |
|
|
|
|
| 348 |
|
|
.global _060_imem_read_long
|
| 349 |
|
|
_060_imem_read_long:
|
| 350 |
|
|
btst #0x5,0x4(%a6) | check for supervisor state
|
| 351 |
|
|
bnes imrls | supervisor
|
| 352 |
|
|
imrlu: subq.l #0x4,%sp | clear space on stack for result
|
| 353 |
|
|
move.l #0x4,-(%sp) | pass: # bytes to copy
|
| 354 |
|
|
pea 0x4(%sp) | pass: dst addr (stack)
|
| 355 |
|
|
move.l %a0,-(%sp) | pass: src addr (user mem)
|
| 356 |
|
|
bsr.l _copyin | "copy in" the data
|
| 357 |
|
|
move.l %d0,%d1 | return success
|
| 358 |
|
|
add.l #0xc,%sp | delete params
|
| 359 |
|
|
move.l (%sp)+,%d0 | put answer in d0
|
| 360 |
|
|
rts
|
| 361 |
|
|
imrls: move.l (%a0),%d0 | fetch super longword
|
| 362 |
|
|
clr.l %d1 | return success
|
| 363 |
|
|
rts
|
| 364 |
|
|
|
| 365 |
|
|
|###############################################
|
| 366 |
|
|
|
| 367 |
|
|
|
|
| 368 |
|
|
| Use these routines if your kernel doesn't have _copyout/_copyin equivalents.
|
| 369 |
|
|
| Assumes that D0/D1/A0/A1 are scratch registers. The _copyin/_copyout
|
| 370 |
|
|
| below assume that the SFC/DFC have been set previously.
|
| 371 |
|
|
|
|
| 372 |
|
|
|
| 373 |
|
|
|
|
| 374 |
|
|
| int _copyout(supervisor_addr, user_addr, nbytes)
|
| 375 |
|
|
|
|
| 376 |
|
|
.global _copyout
|
| 377 |
|
|
_copyout:
|
| 378 |
|
|
move.l 4(%sp),%a0 | source
|
| 379 |
|
|
move.l 8(%sp),%a1 | destination
|
| 380 |
|
|
move.l 12(%sp),%d0 | count
|
| 381 |
|
|
moreout:
|
| 382 |
|
|
move.b (%a0)+,%d1 | fetch supervisor byte
|
| 383 |
|
|
movs.b %d1,(%a1)+ | store user byte
|
| 384 |
|
|
subq.l #0x1,%d0 | are we through yet?
|
| 385 |
|
|
bne moreout | no; so, continue
|
| 386 |
|
|
rts
|
| 387 |
|
|
|
| 388 |
|
|
|
|
| 389 |
|
|
| int _copyin(user_addr, supervisor_addr, nbytes)
|
| 390 |
|
|
|
|
| 391 |
|
|
.global _copyin
|
| 392 |
|
|
_copyin:
|
| 393 |
|
|
move.l 4(%sp),%a0 | source
|
| 394 |
|
|
move.l 8(%sp),%a1 | destination
|
| 395 |
|
|
move.l 12(%sp),%d0 | count
|
| 396 |
|
|
morein:
|
| 397 |
|
|
movs.b (%a0)+,%d1 | fetch user byte
|
| 398 |
|
|
move.b %d1,(%a1)+ | write supervisor byte
|
| 399 |
|
|
subq.l #0x1,%d0 | are we through yet?
|
| 400 |
|
|
bne morein | no; so, continue
|
| 401 |
|
|
rts
|
| 402 |
|
|
|
| 403 |
|
|
|###########################################################################
|
| 404 |
|
|
|
| 405 |
|
|
|
|
| 406 |
|
|
| _060_real_trace():
|
| 407 |
|
|
|
|
| 408 |
|
|
| This is the exit point for the 060FPSP when an instruction is being traced
|
| 409 |
|
|
| and there are no other higher priority exceptions pending for this instruction
|
| 410 |
|
|
| or they have already been processed.
|
| 411 |
|
|
|
|
| 412 |
|
|
| The sample code below simply executes an "rte".
|
| 413 |
|
|
|
|
| 414 |
|
|
.global _060_real_trace
|
| 415 |
|
|
_060_real_trace:
|
| 416 |
|
|
rte
|
| 417 |
|
|
|
| 418 |
|
|
|
|
| 419 |
|
|
| _060_real_access():
|
| 420 |
|
|
|
|
| 421 |
|
|
| This is the exit point for the 060FPSP when an access error exception
|
| 422 |
|
|
| is encountered. The routine below should point to the operating system
|
| 423 |
|
|
| handler for access error exceptions. The exception stack frame is an
|
| 424 |
|
|
| 8-word access error frame.
|
| 425 |
|
|
|
|
| 426 |
|
|
| The sample routine below simply executes an "rte" instruction which
|
| 427 |
|
|
| is most likely the incorrect thing to do and could put the system
|
| 428 |
|
|
| into an infinite loop.
|
| 429 |
|
|
|
|
| 430 |
|
|
.global _060_real_access
|
| 431 |
|
|
_060_real_access:
|
| 432 |
|
|
rte
|
