292 lines
8.4 KiB
ArmAsm
292 lines
8.4 KiB
ArmAsm
#
|
|
# $NetBSD: inetbsd.S,v 1.3 1997/07/28 19:01:13 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:
|
|
# 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:
|
|
tstb sp@ |# is tracing enabled?
|
|
bpls real_chk_end |# no
|
|
|
|
#
|
|
# CHK FRAME TRACE FRAME
|
|
# ***************** *****************
|
|
# * Current PC * * Current PC *
|
|
# ***************** *****************
|
|
# * 0x2 * 0x018 * * 0x2 * 0x024 *
|
|
# ***************** *****************
|
|
# * Next * * Next *
|
|
# * PC * * PC *
|
|
# ***************** *****************
|
|
# * SR * * SR *
|
|
# ***************** *****************
|
|
#
|
|
moveb #0x24,sp@(0x7) |# set trace vecno
|
|
bral _060_real_trace
|
|
|
|
real_chk_end:
|
|
jmp _chkinst
|
|
|
|
#
|
|
# _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:
|
|
tstb sp@ |# is tracing enabled?
|
|
bpls real_divbyzero_end |# no
|
|
|
|
#
|
|
# DIVBYZERO FRAME TRACE FRAME
|
|
# ***************** *****************
|
|
# * Current PC * * Current PC *
|
|
# ***************** *****************
|
|
# * 0x2 * 0x014 * * 0x2 * 0x024 *
|
|
# ***************** *****************
|
|
# * Next * * Next *
|
|
# * PC * * PC *
|
|
# ***************** *****************
|
|
# * SR * * SR *
|
|
# ***************** *****************
|
|
#
|
|
moveb #0x24,sp@(0x7) |# set trace vecno
|
|
bral _060_real_trace
|
|
|
|
real_divbyzero_end:
|
|
jmp _zerodiv
|
|
|
|
###########################
|
|
|
|
#
|
|
# _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:
|
|
bral _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:
|
|
bral _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:
|
|
clrl 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:
|
|
clrl d0
|
|
rts
|
|
|
|
############################################################################
|
|
|
|
##################################
|
|
# (2) EXAMPLE PACKAGE ENTRY CODE #
|
|
##################################
|
|
|
|
.global _060_isp_unimp
|
|
_060_isp_unimp:
|
|
bral _I_CALL_TOP+0x80+0x00
|
|
|
|
.global _060_isp_cas
|
|
_060_isp_cas:
|
|
bral _I_CALL_TOP+0x80+0x08
|
|
|
|
.global _060_isp_cas2
|
|
_060_isp_cas2:
|
|
bral _I_CALL_TOP+0x80+0x10
|
|
|
|
.global _060_isp_cas_finish
|
|
_060_isp_cas_finish:
|
|
bral _I_CALL_TOP+0x80+0x18
|
|
|
|
.global _060_isp_cas2_finish
|
|
_060_isp_cas2_finish:
|
|
bral _I_CALL_TOP+0x80+0x20
|
|
|
|
.global _060_isp_cas_inrange
|
|
_060_isp_cas_inrange:
|
|
bral _I_CALL_TOP+0x80+0x28
|
|
|
|
.global _060_isp_cas_terminate
|
|
_060_isp_cas_terminate:
|
|
bral _I_CALL_TOP+0x80+0x30
|
|
|
|
.global _060_isp_cas_restart
|
|
_060_isp_cas_restart:
|
|
bral _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!!!
|
|
|
|
.include "isp.S"
|