1 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2 MOTOROLA MICROPROCESSOR & MEMORY TECHNOLOGY GR
3 M68000 Hi-Performance Microprocessor Division
4 M68060 Software Package
5 Production Release P1.00 -- October 10, 1994
6
7 M68060 Software Package Copyright © 1993, 199
8
9 THE SOFTWARE is provided on an "AS IS" basis a
10 To the maximum extent permitted by applicable
11 MOTOROLA DISCLAIMS ALL WARRANTIES WHETHER EXPR
12 INCLUDING IMPLIED WARRANTIES OF MERCHANTABILIT
13 and any warranty against infringement with reg
14 (INCLUDING ANY MODIFIED VERSIONS THEREOF) and
15
16 To the maximum extent permitted by applicable
17 IN NO EVENT SHALL MOTOROLA BE LIABLE FOR ANY D
18 (INCLUDING WITHOUT LIMITATION, DAMAGES FOR LOS
19 BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORM
20 ARISING OF THE USE OR INABILITY TO USE THE SOF
21 Motorola assumes no responsibility for the mai
22
23 You are hereby granted a copyright license to
24 so long as this entire notice is retained with
25 redistributed versions, and that such modified
26 No licenses are granted by implication, estopp
27 or trademarks of Motorola, Inc.
28 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
29 68060 INTEGER SOFTWARE PACKAGE (Kernel version
30 ----------------------------------------------
31
32 The file isp.sa contains the 68060 Integer Sof
33 This package is essentially an exception handl
34 integrated into an operating system to handle
35 Integer Instruction" exception vector #61.
36 This exception is taken when any of the intege
37 not hardware implemented on the 68060 are enco
38 isp.sa provides full emulation support for the
39
40 The unimplemented integer instructions are:
41 64-bit divide
42 64-bit multiply
43 movep
44 cmp2
45 chk2
46 cas (w/ a misaligned effective address
47 cas2
48
49 Release file format:
50 --------------------
51 The file isp.sa is essentially a hexadecimal i
52 release package. This is the ONLY format which
53 The hex image was created by assembling the so
54 then converting the resulting binary output im
55 ASCII text file. The hexadecimal numbers are l
56 using the Motorola Assembly Syntax assembler d
57 (define constant longword). The file can be co
58 assembly syntaxes by using any word processor
59 search and replace function.
60
61 To assist in assembling and linking this modul
62 the installer should add a symbolic label to t
63 This will allow calling routines to access the
64 of this package.
65
66 The source code isp.s has also been included b
67 documentation purposes.
68
69 Release file structure:
70 -----------------------
71
72 (top of module)
73 -----------------
74 | | - 128 byte-sized sec
75 (1) | Call-Out | - 4 bytes per entry
76 | | - example routines i
77 -----------------
78 | | - 8 bytes per entry
79 (2) | Entry Point | - user does a "bra"
80 | |
81 -----------------
82 | | - code section
83 (3) ~ ~
84 | |
85 -----------------
86 (bottom of module)
87
88 The first section of this module is the "Call-
89 is NOT INCLUDED in isp.sa (an example "Call-ou
90 the end of the file iskeleton.s). The purpose
91 the ISP routines to reference external functio
92 by the host operating system. This section MUS
93 size. There are 32 fields, each 4 bytes in siz
94 to a function required by the ISP (these funct
95 listed in "68060ISP call-outs" below). Each fi
96 the address of the corresponding function RELA
97 of the "call-out" section. The "Call-out" sect
98 isp.sa image in memory.
99
100 The second section, the "Entry-point" section,
101 to access the functions within the ISP. Since
102 no symbol names, this section contains functio
103 with respect to the top of the package. The cu
104 are listed in section "68060 ISP entry points"
105 would simply execute a "bra" or "jmp" that jum
106 entry-point.
107
108 For example, if the 68060 hardware took a "Uni
109 exception (vector #61), the operating system s
110 similar to:
111
112 bra _060ISP_TOP+128+0
113
114 (_060ISP_TOP is the starting address of the "C
115 section is 128 bytes long; and the Unimplement
116 point is located 0 bytes from the top of the "
117
118 The third section is the code section. After e
119 the entry code jumps to the appropriate emulat
120
121 68060ISP call-outs: (details in iskeleton.s)
122 --------------------
123 0x000: _060_real_chk
124 0x004: _060_real_divbyzero
125 0x008: _060_real_trace
126 0x00c: _060_real_access
127 0x010: _060_isp_done
128
129 0x014: _060_real_cas
130 0x018: _060_real_cas2
131 0x01c: _060_real_lock_page
132 0x020: _060_real_unlock_page
133
134 0x024: (Motorola reserved)
135 0x028: (Motorola reserved)
136 0x02c: (Motorola reserved)
137 0x030: (Motorola reserved)
138 0x034: (Motorola reserved)
139 0x038: (Motorola reserved)
140 0x03c: (Motorola reserved)
141
142 0x040: _060_imem_read
143 0x044: _060_dmem_read
144 0x048: _060_dmem_write
145 0x04c: _060_imem_read_word
146 0x050: _060_imem_read_long
147 0x054: _060_dmem_read_byte
148 0x058: _060_dmem_read_word
149 0x05c: _060_dmem_read_long
150 0x060: _060_dmem_write_byte
151 0x064: _060_dmem_write_word
152 0x068: _060_dmem_write_long
153
154 0x06c: (Motorola reserved)
155 0x070: (Motorola reserved)
156 0x074: (Motorola reserved)
157 0x078: (Motorola reserved)
158 0x07c: (Motorola reserved)
159
160 68060ISP entry points:
161 -----------------------
162 0x000: _060_isp_unimp
163
164 0x008: _060_isp_cas
165 0x010: _060_isp_cas2
166 0x018: _060_isp_cas_finish
167 0x020: _060_isp_cas2_finish
168 0x028: _060_isp_cas_inrange
169 0x030: _060_isp_cas_terminate
170 0x038: _060_isp_cas_restart
171
172 Integrating cas/cas2:
173 ---------------------
174 The instructions "cas2" and "cas" (when used w
175 address) take the Unimplemented Integer Instru
176 060ISP is installed properly, these instructio
177 _060_isp_unimp() entry point of the ISP.
178
179 After the 060ISP decodes the instruction type
180 data registers, and BEFORE the actual emulated
181 package calls either the "Call-out" _060_real_
182 If the emulation code provided by the 060ISP i
183 host system (see isp.s source code), then thes
184 made, by the system integrator, to point direc
185 through the "Entry-point"s _060_isp_cas() or _
186
187 One other necessary action by the integrator i
188 _060_real_lock_page() and _060_real_unlock_pag
189 defined further in iskeleton.s and the 68060 S
190
191 If the "core" emulation routines of either "ca
192 actions which are too system-specific, then th
193 supply new emulation code. This new emulation
194 the functions _060_real_cas() or _060_real_cas
195 code has completed, then it should re-enter th
196 "Entry-point" _060_isp_cas_finish() or _060_is
197 To see what the register state is upon enterin
198 _060_real_cas2() and what it should be upon re
199 _060_isp_cas_finish() or _060_isp_cas2_finish(
200 source code in isp.s.
201
202 Miscellaneous:
203 --------------
204
205 _060_isp_unimp:
206 ----------------
207 - documented in 2.2 in spec.
208 - Basic flow:
209 exception taken ---> enter _060_isp_un
210
211
212 may exit through _060_real_itrace
213
214 may exit through _060_real_chk
215
216 may exit through _060_real_divbyze
217
218 may exit through _060_isp_done
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