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authorNiklas Hallqvist <niklas@cvs.openbsd.org>1996-05-30 21:14:31 +0000
committerNiklas Hallqvist <niklas@cvs.openbsd.org>1996-05-30 21:14:31 +0000
commit32d9f5dc967f634f8b9912d0541c5cdc5a04ad87 (patch)
tree4c394dded87f01ffced278bda88d885e6763c019 /sys/arch/m68k/060sp/iskeletn.s
parent6c0539d933458ca5bc6e048d4cca4b5ab7259297 (diff)
checkin of files sup have missed earlier, this dir is now at 0529
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+#
+# $NetBSD: iskeletn.s,v 1.2 1996/05/15 19:48:41 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.
+#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+#
+# iskeleton.s
+#
+# This file contains:
+# (1) example "Call-out"s
+# (2) example package entry code
+# (3) example "Call-out" table
+#
+
+
+#################################
+# (1) EXAMPLE CALL-OUTS #
+# #
+# _060_isp_done() #
+# _060_real_chk() #
+# _060_real_divbyzero() #
+# #
+# _060_real_cas() #
+# _060_real_cas2() #
+# _060_real_lock_page() #
+# _060_real_unlock_page() #
+#################################
+
+#
+# _060_isp_done():
+#
+# This is and example main exit point for the Unimplemented Integer
+# Instruction exception handler. For a normal exit, the
+# _isp_unimp() branches to here so that the operating system
+# can do any clean-up desired. The stack frame is the
+# Unimplemented Integer Instruction stack frame with
+# the PC pointing to the instruction following the instruction
+# just emulated.
+# To simply continue execution at the next instruction, just
+# do an "rte".
+#
+ global _060_isp_done
+_060_isp_done:
+ rte
+
+#
+# _060_real_chk():
+#
+# This is an alternate exit point for the Unimplemented Integer
+# Instruction exception handler. If the instruction was a "chk2"
+# and the operand was out of bounds, then _isp_unimp() creates
+# a CHK exception stack frame from the Unimplemented Integer Instrcution
+# stack frame and branches to this routine.
+#
+ global _060_real_chk
+_060_real_chk:
+ tst.b (%sp) # is tracing enabled?
+ bpl.b real_chk_end # no
+
+#
+# CHK FRAME TRACE FRAME
+# ***************** *****************
+# * Current PC * * Current PC *
+# ***************** *****************
+# * 0x2 * 0x018 * * 0x2 * 0x024 *
+# ***************** *****************
+# * Next * * Next *
+# * PC * * PC *
+# ***************** *****************
+# * SR * * SR *
+# ***************** *****************
+#
+ mov.b &0x24,0x7(%sp) # set trace vecno
+ bra.l _060_real_trace
+
+real_chk_end:
+ rte
+
+#
+# _060_real_divbyzero:
+#
+# This is an alternate exit point for the Unimplemented Integer
+# Instruction exception handler isp_unimp(). If the instruction is a 64-bit
+# integer divide where the source operand is a zero, then the _isp_unimp()
+# creates a Divide-by-zero exception stack frame from the Unimplemented
+# Integer Instruction stack frame and branches to this routine.
+#
+# Remember that a trace exception may be pending. The code below performs
+# no action associated with the "chk" exception. If tracing is enabled,
+# then it create a Trace exception stack frame from the "chk" exception
+# stack frame and branches to the _real_trace() entry point.
+#
+ global _060_real_divbyzero
+_060_real_divbyzero:
+ tst.b (%sp) # is tracing enabled?
+ bpl.b real_divbyzero_end # no
+
+#
+# DIVBYZERO FRAME TRACE FRAME
+# ***************** *****************
+# * Current PC * * Current PC *
+# ***************** *****************
+# * 0x2 * 0x014 * * 0x2 * 0x024 *
+# ***************** *****************
+# * Next * * Next *
+# * PC * * PC *
+# ***************** *****************
+# * SR * * SR *
+# ***************** *****************
+#
+ mov.b &0x24,0x7(%sp) # set trace vecno
+ bra.l _060_real_trace
+
+real_divbyzero_end:
+ rte
+
+###########################
+
+#
+# _060_real_cas():
+#
+# Entry point for the selected cas emulation code implementation.
+# If the implementation provided by the 68060ISP is sufficient,
+# then this routine simply re-enters the package through _isp_cas.
+#
+ global _060_real_cas
+_060_real_cas:
+ bra.l _I_CALL_TOP+0x80+0x08
+
+#
+# _060_real_cas2():
+#
+# Entry point for the selected cas2 emulation code implementation.
+# If the implementation provided by the 68060ISP is sufficient,
+# then this routine simply re-enters the package through _isp_cas2.
+#
+ global _060_real_cas2
+_060_real_cas2:
+ bra.l _I_CALL_TOP+0x80+0x10
+
+#
+# _060_lock_page():
+#
+# Entry point for the operating system's routine to "lock" a page
+# from being paged out. This routine is needed by the cas/cas2
+# algorithms so that no page faults occur within the "core" code
+# region. Note: the routine must lock two pages if the operand
+# spans two pages.
+# NOTE: THE ROUTINE SHOULD RETURN AN FSLW VALUE IN D0 ON FAILURE
+# SO THAT THE 060SP CAN CREATE A PROPER ACCESS ERROR FRAME.
+# Arguments:
+# a0 = operand address
+# d0 = `xxxxxxff -> supervisor; `xxxxxx00 -> user
+# d1 = `xxxxxxff -> longword; `xxxxxx00 -> word
+# Expected outputs:
+# d0 = 0 -> success; non-zero -> failure
+#
+ global _060_real_lock_page
+_060_real_lock_page:
+ clr.l %d0
+ rts
+
+#
+# _060_unlock_page():
+#
+# Entry point for the operating system's routine to "unlock" a
+# page that has been "locked" previously with _real_lock_page.
+# Note: the routine must unlock two pages if the operand spans
+# two pages.
+# Arguments:
+# a0 = operand address
+# d0 = `xxxxxxff -> supervisor; `xxxxxx00 -> user
+# d1 = `xxxxxxff -> longword; `xxxxxx00 -> word
+#
+ global _060_real_unlock_page
+_060_real_unlock_page:
+ clr.l %d0
+ rts
+
+############################################################################
+
+##################################
+# (2) EXAMPLE PACKAGE ENTRY CODE #
+##################################
+
+ global _060_isp_unimp
+_060_isp_unimp:
+ bra.l _I_CALL_TOP+0x80+0x00
+
+ global _060_isp_cas
+_060_isp_cas:
+ bra.l _I_CALL_TOP+0x80+0x08
+
+ global _060_isp_cas2
+_060_isp_cas2:
+ bra.l _I_CALL_TOP+0x80+0x10
+
+ global _060_isp_cas_finish
+_060_isp_cas_finish:
+ bra.l _I_CALL_TOP+0x80+0x18
+
+ global _060_isp_cas2_finish
+_060_isp_cas2_finish:
+ bra.l _I_CALL_TOP+0x80+0x20
+
+ global _060_isp_cas_inrange
+_060_isp_cas_inrange:
+ bra.l _I_CALL_TOP+0x80+0x28
+
+ global _060_isp_cas_terminate
+_060_isp_cas_terminate:
+ bra.l _I_CALL_TOP+0x80+0x30
+
+ global _060_isp_cas_restart
+_060_isp_cas_restart:
+ bra.l _I_CALL_TOP+0x80+0x38
+
+############################################################################
+
+################################
+# (3) EXAMPLE CALL-OUT SECTION #
+################################
+
+# The size of this section MUST be 128 bytes!!!
+
+ global _I_CALL_TOP
+_I_CALL_TOP:
+ long _060_real_chk - _I_CALL_TOP
+ long _060_real_divbyzero - _I_CALL_TOP
+ long _060_real_trace - _I_CALL_TOP
+ long _060_real_access - _I_CALL_TOP
+ long _060_isp_done - _I_CALL_TOP
+
+ long _060_real_cas - _I_CALL_TOP
+ long _060_real_cas2 - _I_CALL_TOP
+ long _060_real_lock_page - _I_CALL_TOP
+ long _060_real_unlock_page - _I_CALL_TOP
+
+ long 0x00000000, 0x00000000, 0x00000000, 0x00000000
+ long 0x00000000, 0x00000000, 0x00000000
+
+ long _060_imem_read - _I_CALL_TOP
+ long _060_dmem_read - _I_CALL_TOP
+ long _060_dmem_write - _I_CALL_TOP
+ long _060_imem_read_word - _I_CALL_TOP
+ long _060_imem_read_long - _I_CALL_TOP
+ long _060_dmem_read_byte - _I_CALL_TOP
+ long _060_dmem_read_word - _I_CALL_TOP
+ long _060_dmem_read_long - _I_CALL_TOP
+ long _060_dmem_write_byte - _I_CALL_TOP
+ long _060_dmem_write_word - _I_CALL_TOP
+ long _060_dmem_write_long - _I_CALL_TOP
+
+ long 0x00000000
+ long 0x00000000, 0x00000000, 0x00000000, 0x00000000
+
+############################################################################
+
+# 060 INTEGER KERNEL PACKAGE MUST GO HERE!!!