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 FLOATING-POINT SOFTWARE PACKAGE (Kernel
30 ----------------------------------------------
31
32 The file fpsp.sa contains the 68060 Floating-P
33 Package. This package is essentially a set of
34 that can be integrated into an operating syste
35 These exception handlers emulate Unimplemented
36 instructions using unimplemented data types, a
37 using unimplemented addressing modes. In addit
38 includes exception handlers to provide full IE
39 exception handling.
40
41 Release file format:
42 --------------------
43 The file fpsp.sa is essentially a hexadecimal
44 release package. This is the ONLY format which
45 The hex image was created by assembling the so
46 then converting the resulting binary output im
47 ASCII text file. The hexadecimal numbers are l
48 using the Motorola Assembly Syntax assembler d
49 (define constant longword). The file can be co
50 assembly syntaxes by using any word processor
51 search and replace function.
52
53 To assist in assembling and linking this modul
54 the installer should add a symbolic label to t
55 This will allow calling routines to access the
56 of this package.
57
58 The source code fpsp.s has also been included
59 documentation purposes.
60
61 Release file structure:
62 -----------------------
63
64 (top of module)
65 -----------------
66 | | - 128 byte-sized sec
67 (1) | Call-Out | - 4 bytes per entry
68 | | - example routines i
69 -----------------
70 | | - 8 bytes per entry
71 (2) | Entry Point | - user does "bra" or
72 | |
73 -----------------
74 | | - code section
75 (3) ~ ~
76 | |
77 -----------------
78 (bottom of module)
79
80 The first section of this module is the "Call-
81 is NOT INCLUDED in fpsp.sa (an example "Call-o
82 the end of the file fskeleton.s). The purpose
83 the FPSP routines to reference external functi
84 by the host operating system. This section MUS
85 size. There are 32 fields, each 4 bytes in siz
86 to a function required by the FPSP (these func
87 listed in "68060FPSP call-outs" below). Each f
88 the address of the corresponding function RELA
89 of the "call-out" section. The "Call-out" sect
90 fpsp.sa image in memory.
91
92 The second section, the "Entry-point" section,
93 to access the functions within the FPSP. Since
94 no symbol names, this section contains functio
95 with respect to the top of the package. The cu
96 are listed in section "68060 FPSP entry points
97 would simply execute a "bra" or "jmp" that jum
98 entry-point.
99
100 For example, if the 68060 hardware took a "Lin
101 (vector #11), the operating system should exec
102
103 bra _060FPSP_TOP+128+48
104
105 (_060FPSP_TOP is the starting address of the "
106 section is 128 bytes long; and the F-Line FPSP
107 48 bytes from the top of the "Entry-point" sec
108
109 The third section is the code section. After e
110 the entry code jumps to the appropriate emulat
111
112 68060FPSP call-outs: (details in fskeleton.s)
113 --------------------
114 0x000: _060_real_bsun
115 0x004: _060_real_snan
116 0x008: _060_real_operr
117 0x00c: _060_real_ovfl
118 0x010: _060_real_unfl
119 0x014: _060_real_dz
120 0x018: _060_real_inex
121 0x01c: _060_real_fline
122 0x020: _060_real_fpu_disabled
123 0x024: _060_real_trap
124 0x028: _060_real_trace
125 0x02c: _060_real_access
126 0x030: _060_fpsp_done
127
128 0x034: (Motorola reserved)
129 0x038: (Motorola reserved)
130 0x03c: (Motorola reserved)
131
132 0x040: _060_imem_read
133 0x044: _060_dmem_read
134 0x048: _060_dmem_write
135 0x04c: _060_imem_read_word
136 0x050: _060_imem_read_long
137 0x054: _060_dmem_read_byte
138 0x058: _060_dmem_read_word
139 0x05c: _060_dmem_read_long
140 0x060: _060_dmem_write_byte
141 0x064: _060_dmem_write_word
142 0x068: _060_dmem_write_long
143
144 0x06c: (Motorola reserved)
145 0x070: (Motorola reserved)
146 0x074: (Motorola reserved)
147 0x078: (Motorola reserved)
148 0x07c: (Motorola reserved)
149
150 68060FPSP entry points:
151 -----------------------
152 0x000: _060_fpsp_snan
153 0x008: _060_fpsp_operr
154 0x010: _060_fpsp_ovfl
155 0x018: _060_fpsp_unfl
156 0x020: _060_fpsp_dz
157 0x028: _060_fpsp_inex
158 0x030: _060_fpsp_fline
159 0x038: _060_fpsp_unsupp
160 0x040: _060_fpsp_effadd
161
162
163
164 Miscellaneous:
165 --------------
166
167 _060_fpsp_snan:
168 ----------------
169 - documented in 3.5 of 060SP spec.
170 - Basic flow:
171 exception taken ---> enter _060_fpsp_s
172
173 always exits through _060_real_sna
174
175 _060_fpsp_operr:
176 ----------------
177 - documented in 3.5 of 060SP spec.
178 - Basic flow:
179 exception taken ---> enter _060_fpsp_o
180
181 always exits through _060_real_oper
182
183 _060_fpsp_dz:
184 ----------------
185 - documented in 3.7 of 060SP spec.
186 - Basic flow:
187 exception taken ---> enter _060_fpsp_d
188
189 always exits through _060_real_dz
190
191 _060_fpsp_inex:
192 ----------------
193 - documented in 3.6 of 060SP spec.
194 - Basic flow:
195 exception taken ---> enter _060_fpsp_i
196
197 always exits through _060_real_ine
198
199
200 _060_fpsp_ovfl:
201 ----------------
202 - documented in 3.4 of 060SP spec.
203 - Basic flow:
204 exception taken ---> enter _060_fpsp_o
205
206 may exit through _060_real_inex
207
208 may exit through _060_real_ovfl
209
210 may exit through _060_fpsp_done
211
212 _060_fpsp_unfl:
213 ----------------
214 - documented in 3.4 of 060SP spec.
215 - Basic flow:
216 exception taken ---> enter _060_fpsp_u
217
218 may exit through _060_real_inex
219
220 may exit through _060_real_unfl
221
222 may exit through _060_fpsp_done
223
224
225 _060_fpsp_fline:
226 -----------------
227 - not fully documented in 060SP spec.
228 - Basic flow:
229 exception taken ---> enter _060_fpsp_f
230
231 ----------------------------------
232 | |
233 v v
234 (unimplemented (fpu disabled) (poss
235 stack frame) |
236 | v sp
237 | exit through
238 | _060_real_fpu_disabled
239 |
240 | ^
241 | |
242 | |
243 | | fpu
244 | |
245 v | ----
246 | | |
247 | | v
248 | |-----------(yes)
249 |
250 |----<----------------------------
251 |
252 |
253 |----> may exit through _060_real_
254 |
255 |----> may exit through _060_real_
256 |
257 |----> may exit through _060_real_
258 |
259 |----> may exit through _060_fpsp_
260
261
262 _060_fpsp_unsupp:
263 ------------------
264 - documented in 3.1 of 060SP spec.
265 - Basic flow:
266 exception taken ---> enter _060_fpsp_u
267
268
269 may exit through _060_real_snan
270
271 may exit through _060_real_operr
272
273 may exit through _060_real_ovfl
274
275 may exit through _060_real_unfl
276
277 may exit through _060_real_inex
278
279 may exit through _060_real_trace
280
281 may exit through _060_fpsp_done
282
283
284 _060_fpsp_effadd:
285 ------------------
286 - documented in 3.3 of 060 spec.
287 - Basic flow:
288 exception taken ---> enter _060_fpsp_e
289
290
291 may exit through _060_real_trace
292
293 may exit through _060_real_fpu_disabled
294
295 may exit through _060_fpsp_done
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