292 lines
8.4 KiB
ArmAsm
292 lines
8.4 KiB
ArmAsm
#
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# $NetBSD: inetbsd.S,v 1.2 1996/05/15 21:16:44 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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# Derived from:
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# iskeleton.s
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#
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# This file contains:
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# (1) example "Call-out"s
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# (2) example package entry code
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# (3) example "Call-out" table
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#
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#################################
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# (1) EXAMPLE CALL-OUTS #
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# #
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# _060_isp_done() #
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# _060_real_chk() #
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# _060_real_divbyzero() #
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# #
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# _060_real_cas() #
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# _060_real_cas2() #
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# _060_real_lock_page() #
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# _060_real_unlock_page() #
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#################################
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#
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# _060_isp_done():
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#
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# This is and example main exit point for the Unimplemented Integer
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# Instruction exception handler. For a normal exit, the
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# _isp_unimp() branches to here so that the operating system
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# can do any clean-up desired. The stack frame is the
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# Unimplemented Integer Instruction stack frame with
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# the PC pointing to the instruction following the instruction
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# just emulated.
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# To simply continue execution at the next instruction, just
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# do an "rte".
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#
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.global _060_isp_done
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_060_isp_done:
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rte
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#
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# _060_real_chk():
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#
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# This is an alternate exit point for the Unimplemented Integer
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# Instruction exception handler. If the instruction was a "chk2"
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# and the operand was out of bounds, then _isp_unimp() creates
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# a CHK exception stack frame from the Unimplemented Integer Instrcution
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# stack frame and branches to this routine.
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#
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.global _060_real_chk
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_060_real_chk:
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tstb sp@ |# is tracing enabled?
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bpls real_chk_end |# no
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#
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# CHK FRAME TRACE FRAME
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# ***************** *****************
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# * Current PC * * Current PC *
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# ***************** *****************
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# * 0x2 * 0x018 * * 0x2 * 0x024 *
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# ***************** *****************
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# * Next * * Next *
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# * PC * * PC *
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# ***************** *****************
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# * SR * * SR *
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# ***************** *****************
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#
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moveb #0x24,sp@(0x7) |# set trace vecno
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bral _060_real_trace
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real_chk_end:
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jmp _chkinst
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#
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# _060_real_divbyzero:
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#
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# This is an alternate exit point for the Unimplemented Integer
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# Instruction exception handler isp_unimp(). If the instruction is a 64-bit
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# integer divide where the source operand is a zero, then the _isp_unimp()
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# creates a Divide-by-zero exception stack frame from the Unimplemented
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# Integer Instruction stack frame and branches to this routine.
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#
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# Remember that a trace exception may be pending. The code below performs
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# no action associated with the "chk" exception. If tracing is enabled,
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# then it create a Trace exception stack frame from the "chk" exception
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# stack frame and branches to the _real_trace() entry point.
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#
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.global _060_real_divbyzero
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_060_real_divbyzero:
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tstb sp@ |# is tracing enabled?
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bpls real_divbyzero_end |# no
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#
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# DIVBYZERO FRAME TRACE FRAME
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# ***************** *****************
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# * Current PC * * Current PC *
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# ***************** *****************
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# * 0x2 * 0x014 * * 0x2 * 0x024 *
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# ***************** *****************
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# * Next * * Next *
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# * PC * * PC *
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# ***************** *****************
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# * SR * * SR *
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# ***************** *****************
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#
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moveb #0x24,sp@(0x7) |# set trace vecno
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bral _060_real_trace
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real_divbyzero_end:
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jmp _zerodiv
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###########################
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#
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# _060_real_cas():
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#
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# Entry point for the selected cas emulation code implementation.
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# If the implementation provided by the 68060ISP is sufficient,
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# then this routine simply re-enters the package through _isp_cas.
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#
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.global _060_real_cas
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_060_real_cas:
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bral _I_CALL_TOP+0x80+0x08
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#
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# _060_real_cas2():
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#
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# Entry point for the selected cas2 emulation code implementation.
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# If the implementation provided by the 68060ISP is sufficient,
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# then this routine simply re-enters the package through _isp_cas2.
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#
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.global _060_real_cas2
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_060_real_cas2:
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bral _I_CALL_TOP+0x80+0x10
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#
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# _060_lock_page():
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#
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# Entry point for the operating system's routine to "lock" a page
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# from being paged out. This routine is needed by the cas/cas2
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# algorithms so that no page faults occur within the "core" code
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# region. Note: the routine must lock two pages if the operand
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# spans two pages.
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# NOTE: THE ROUTINE SHOULD RETURN AN FSLW VALUE IN D0 ON FAILURE
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# SO THAT THE 060SP CAN CREATE A PROPER ACCESS ERROR FRAME.
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# Arguments:
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# a0 = operand address
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# d0 = `xxxxxxff -> supervisor| `xxxxxx00 -> user
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# d1 = `xxxxxxff -> longword| `xxxxxx00 -> word
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# Expected outputs:
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# d0 = 0 -> success| non-zero -> failure
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#
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.global _060_real_lock_page
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_060_real_lock_page:
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clrl d0
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rts
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#
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# _060_unlock_page():
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#
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# Entry point for the operating system's routine to "unlock" a
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# page that has been "locked" previously with _real_lock_page.
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# Note: the routine must unlock two pages if the operand spans
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# two pages.
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# Arguments:
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# a0 = operand address
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# d0 = `xxxxxxff -> supervisor| `xxxxxx00 -> user
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# d1 = `xxxxxxff -> longword| `xxxxxx00 -> word
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#
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.global _060_real_unlock_page
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_060_real_unlock_page:
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clrl d0
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rts
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############################################################################
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##################################
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# (2) EXAMPLE PACKAGE ENTRY CODE #
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##################################
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.global _060_isp_unimp
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_060_isp_unimp:
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bral _I_CALL_TOP+0x80+0x00
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.global _060_isp_cas
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_060_isp_cas:
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bral _I_CALL_TOP+0x80+0x08
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.global _060_isp_cas2
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_060_isp_cas2:
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bral _I_CALL_TOP+0x80+0x10
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.global _060_isp_cas_finish
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_060_isp_cas_finish:
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bral _I_CALL_TOP+0x80+0x18
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.global _060_isp_cas2_finish
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_060_isp_cas2_finish:
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bral _I_CALL_TOP+0x80+0x20
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.global _060_isp_cas_inrange
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_060_isp_cas_inrange:
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bral _I_CALL_TOP+0x80+0x28
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.global _060_isp_cas_terminate
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_060_isp_cas_terminate:
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bral _I_CALL_TOP+0x80+0x30
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.global _060_isp_cas_restart
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_060_isp_cas_restart:
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bral _I_CALL_TOP+0x80+0x38
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############################################################################
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################################
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# (3) EXAMPLE CALL-OUT SECTION #
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################################
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# The size of this section MUST be 128 bytes!!!
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.global _I_CALL_TOP
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_I_CALL_TOP:
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.long _060_real_chk-_I_CALL_TOP
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.long _060_real_divbyzero-_I_CALL_TOP
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.long _060_real_trace-_I_CALL_TOP
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.long _060_real_access-_I_CALL_TOP
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.long _060_isp_done-_I_CALL_TOP
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.long _060_real_cas-_I_CALL_TOP
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.long _060_real_cas2-_I_CALL_TOP
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.long _060_real_lock_page-_I_CALL_TOP
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.long _060_real_unlock_page-_I_CALL_TOP
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.long 0x00000000,0x00000000,0x00000000,0x00000000
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.long 0x00000000,0x00000000,0x00000000
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.long _060_imem_read-_I_CALL_TOP
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.long _060_dmem_read-_I_CALL_TOP
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.long _060_dmem_write-_I_CALL_TOP
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.long _060_imem_read_word-_I_CALL_TOP
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.long _060_imem_read_long-_I_CALL_TOP
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.long _060_dmem_read_byte-_I_CALL_TOP
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.long _060_dmem_read_word-_I_CALL_TOP
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.long _060_dmem_read_long-_I_CALL_TOP
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.long _060_dmem_write_byte-_I_CALL_TOP
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.long _060_dmem_write_word-_I_CALL_TOP
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.long _060_dmem_write_long-_I_CALL_TOP
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.long 0x00000000
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.long 0x00000000,0x00000000,0x00000000,0x00000000
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############################################################################
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# 060 INTEGER KERNEL PACKAGE MUST GO HERE!!!
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.include "isp.S"
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