1|~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2|MOTOROLA MICROPROCESSOR & MEMORY TECHNOLOGY GROUP
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, 1994 Motorola Inc. All rights reserved.
8|
9|THE SOFTWARE is provided on an "AS IS" basis and without warranty.
10|To the maximum extent permitted by applicable law,
11|MOTOROLA DISCLAIMS ALL WARRANTIES WHETHER EXPRESS OR IMPLIED,
12|INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
13|and any warranty against infringement with regard to the SOFTWARE
14|(INCLUDING ANY MODIFIED VERSIONS THEREOF) and any accompanying written materials.
15|
16|To the maximum extent permitted by applicable law,
17|IN NO EVENT SHALL MOTOROLA BE LIABLE FOR ANY DAMAGES WHATSOEVER
18|(INCLUDING WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS,
19|BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR OTHER PECUNIARY LOSS)
20|ARISING OF THE USE OR INABILITY TO USE THE SOFTWARE.
21|Motorola assumes no responsibility for the maintenance and support of the SOFTWARE.
22|
23|You are hereby granted a copyright license to use, modify, and distribute the SOFTWARE
24|so long as this entire notice is retained without alteration in any modified and/or
25|redistributed versions, and that such modified versions are clearly identified as such.
26|No licenses are granted by implication, estoppel or otherwise under any patents
27|or trademarks of Motorola, Inc.
28|~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
29| fskeleton.s
30|
31| This file contains:
32| (1) example "Call-out"s
33| (2) example package entry code
34| (3) example "Call-out" table
35|
36
37#include <linux/linkage.h>
38
39|
40| (1) EXAMPLE CALL-OUTS
41|
42| _060_fpsp_done()
43| _060_real_ovfl()
44| _060_real_unfl()
45| _060_real_operr()
46| _060_real_snan()
47| _060_real_dz()
48| _060_real_inex()
49| _060_real_bsun()
50| _060_real_fline()
51| _060_real_fpu_disabled()
52| _060_real_trap()
53|
54
55|
56| _060_fpsp_done():
57|
58| This is the main exit point for the 68060 Floating-Point
59| Software Package. For a normal exit, all 060FPSP routines call this
60| routine. The operating system can do system dependent clean-up or
61| simply execute an "rte" as with the sample code below.
62|
63 .global _060_fpsp_done
64_060_fpsp_done:
65 bral _060_isp_done | do the same as isp_done
66
67|
68| _060_real_ovfl():
69|
70| This is the exit point for the 060FPSP when an enabled overflow exception
71| is present. The routine below should point to the operating system handler
72| for enabled overflow conditions. The exception stack frame is an overflow
73| stack frame. The FP state frame holds the EXCEPTIONAL OPERAND.
74|
75| The sample routine below simply clears the exception status bit and
76| does an "rte".
77|
78 .global _060_real_ovfl
79_060_real_ovfl:
80 fsave -(%sp)
81 move.w
82 frestore (%sp)+
83 bral trap | jump to trap handler
84
85
86|
87| _060_real_unfl():
88|
89| This is the exit point for the 060FPSP when an enabled underflow exception
90| is present. The routine below should point to the operating system handler
91| for enabled underflow conditions. The exception stack frame is an underflow
92| stack frame. The FP state frame holds the EXCEPTIONAL OPERAND.
93|
94| The sample routine below simply clears the exception status bit and
95| does an "rte".
96|
97 .global _060_real_unfl
98_060_real_unfl:
99 fsave -(%sp)
100 move.w
101 frestore (%sp)+
102 bral trap | jump to trap handler
103
104|
105| _060_real_operr():
106|
107| This is the exit point for the 060FPSP when an enabled operand error exception
108| is present. The routine below should point to the operating system handler
109| for enabled operand error exceptions. The exception stack frame is an operand error
110| stack frame. The FP state frame holds the source operand of the faulting
111| instruction.
112|
113| The sample routine below simply clears the exception status bit and
114| does an "rte".
115|
116 .global _060_real_operr
117_060_real_operr:
118 fsave -(%sp)
119 move.w
120 frestore (%sp)+
121 bral trap | jump to trap handler
122
123|
124| _060_real_snan():
125|
126| This is the exit point for the 060FPSP when an enabled signalling NaN exception
127| is present. The routine below should point to the operating system handler
128| for enabled signalling NaN exceptions. The exception stack frame is a signalling NaN
129| stack frame. The FP state frame holds the source operand of the faulting
130| instruction.
131|
132| The sample routine below simply clears the exception status bit and
133| does an "rte".
134|
135 .global _060_real_snan
136_060_real_snan:
137 fsave -(%sp)
138 move.w
139 frestore (%sp)+
140 bral trap | jump to trap handler
141
142|
143| _060_real_dz():
144|
145| This is the exit point for the 060FPSP when an enabled divide-by-zero exception
146| is present. The routine below should point to the operating system handler
147| for enabled divide-by-zero exceptions. The exception stack frame is a divide-by-zero
148| stack frame. The FP state frame holds the source operand of the faulting
149| instruction.
150|
151| The sample routine below simply clears the exception status bit and
152| does an "rte".
153|
154 .global _060_real_dz
155_060_real_dz:
156 fsave -(%sp)
157 move.w
158 frestore (%sp)+
159 bral trap | jump to trap handler
160
161|
162| _060_real_inex():
163|
164| This is the exit point for the 060FPSP when an enabled inexact exception
165| is present. The routine below should point to the operating system handler
166| for enabled inexact exceptions. The exception stack frame is an inexact
167| stack frame. The FP state frame holds the source operand of the faulting
168| instruction.
169|
170| The sample routine below simply clears the exception status bit and
171| does an "rte".
172|
173 .global _060_real_inex
174_060_real_inex:
175 fsave -(%sp)
176 move.w
177 frestore (%sp)+
178 bral trap | jump to trap handler
179
180|
181| _060_real_bsun():
182|
183| This is the exit point for the 060FPSP when an enabled bsun exception
184| is present. The routine below should point to the operating system handler
185| for enabled bsun exceptions. The exception stack frame is a bsun
186| stack frame.
187|
188| The sample routine below clears the exception status bit, clears the NaN
189| bit in the FPSR, and does an "rte". The instruction that caused the
190| bsun will now be re-executed but with the NaN FPSR bit cleared.
191|
192 .global _060_real_bsun
193_060_real_bsun:
194| fsave -(%sp)
195
196 fmove.l %fpsr,-(%sp)
197 andi.b
198 fmove.l (%sp)+,%fpsr
199
200 bral trap | jump to trap handler
201
202|
203| _060_real_fline():
204|
205| This is the exit point for the 060FPSP when an F-Line Illegal exception is
206| encountered. Three different types of exceptions can enter the F-Line exception
207| vector number 11: FP Unimplemented Instructions, FP implemented instructions when
208| the FPU is disabled, and F-Line Illegal instructions. The 060FPSP module
209| _fpsp_fline() distinguishes between the three and acts appropriately. F-Line
210| Illegals branch here.
211|
212 .global _060_real_fline
213_060_real_fline:
214 bral trap | jump to trap handler
215
216|
217| _060_real_fpu_disabled():
218|
219| This is the exit point for the 060FPSP when an FPU disabled exception is
220| encountered. Three different types of exceptions can enter the F-Line exception
221| vector number 11: FP Unimplemented Instructions, FP implemented instructions when
222| the FPU is disabled, and F-Line Illegal instructions. The 060FPSP module
223| _fpsp_fline() distinguishes between the three and acts appropriately. FPU disabled
224| exceptions branch here.
225|
226| The sample code below enables the FPU, sets the PC field in the exception stack
227| frame to the PC of the instruction causing the exception, and does an "rte".
228| The execution of the instruction then proceeds with an enabled floating-point
229| unit.
230|
231 .global _060_real_fpu_disabled
232_060_real_fpu_disabled:
233 move.l %d0,-(%sp) | enabled the fpu
234 .long 0x4E7A0808 |movec pcr,%d0
235 bclr
236 .long 0x4E7B0808 |movec %d0,pcr
237 move.l (%sp)+,%d0
238
239 move.l 0xc(%sp),0x2(%sp) | set "Current PC"
240 rte
241
242|
243| _060_real_trap():
244|
245| This is the exit point for the 060FPSP when an emulated "ftrapcc" instruction
246| discovers that the trap condition is true and it should branch to the operating
247| system handler for the trap exception vector number 7.
248|
249| The sample code below simply executes an "rte".
250|
251 .global _060_real_trap
252_060_real_trap:
253 bral trap | jump to trap handler
254
255|
256
257|
258| (2) EXAMPLE PACKAGE ENTRY CODE
259|
260
261 .global _060_fpsp_snan
262_060_fpsp_snan:
263 bra.l _FP_CALL_TOP+0x80+0x00
264
265 .global _060_fpsp_operr
266_060_fpsp_operr:
267 bra.l _FP_CALL_TOP+0x80+0x08
268
269 .global _060_fpsp_ovfl
270_060_fpsp_ovfl:
271 bra.l _FP_CALL_TOP+0x80+0x10
272
273 .global _060_fpsp_unfl
274_060_fpsp_unfl:
275 bra.l _FP_CALL_TOP+0x80+0x18
276
277 .global _060_fpsp_dz
278_060_fpsp_dz:
279 bra.l _FP_CALL_TOP+0x80+0x20
280
281 .global _060_fpsp_inex
282_060_fpsp_inex:
283 bra.l _FP_CALL_TOP+0x80+0x28
284
285 .global _060_fpsp_fline
286_060_fpsp_fline:
287 bra.l _FP_CALL_TOP+0x80+0x30
288
289 .global _060_fpsp_unsupp
290_060_fpsp_unsupp:
291 bra.l _FP_CALL_TOP+0x80+0x38
292
293 .global _060_fpsp_effadd
294_060_fpsp_effadd:
295 bra.l _FP_CALL_TOP+0x80+0x40
296
297|
298
299|
300| (3) EXAMPLE CALL-OUT SECTION
301|
302
303| The size of this section MUST be 128 bytes!!!
304
305_FP_CALL_TOP:
306 .long _060_real_bsun - _FP_CALL_TOP
307 .long _060_real_snan - _FP_CALL_TOP
308 .long _060_real_operr - _FP_CALL_TOP
309 .long _060_real_ovfl - _FP_CALL_TOP
310 .long _060_real_unfl - _FP_CALL_TOP
311 .long _060_real_dz - _FP_CALL_TOP
312 .long _060_real_inex - _FP_CALL_TOP
313 .long _060_real_fline - _FP_CALL_TOP
314 .long _060_real_fpu_disabled - _FP_CALL_TOP
315 .long _060_real_trap - _FP_CALL_TOP
316 .long _060_real_trace - _FP_CALL_TOP
317 .long _060_real_access - _FP_CALL_TOP
318 .long _060_fpsp_done - _FP_CALL_TOP
319
320 .long 0x00000000, 0x00000000, 0x00000000
321
322 .long _060_imem_read - _FP_CALL_TOP
323 .long _060_dmem_read - _FP_CALL_TOP
324 .long _060_dmem_write - _FP_CALL_TOP
325 .long _060_imem_read_word - _FP_CALL_TOP
326 .long _060_imem_read_long - _FP_CALL_TOP
327 .long _060_dmem_read_byte - _FP_CALL_TOP
328 .long _060_dmem_read_word - _FP_CALL_TOP
329 .long _060_dmem_read_long - _FP_CALL_TOP
330 .long _060_dmem_write_byte - _FP_CALL_TOP
331 .long _060_dmem_write_word - _FP_CALL_TOP
332 .long _060_dmem_write_long - _FP_CALL_TOP
333
334 .long 0x00000000
335
336 .long 0x00000000, 0x00000000, 0x00000000, 0x00000000
337
338|
339
340| 060 FPSP KERNEL PACKAGE NEEDS TO GO HERE!!!
341
342#include "fpsp.sa"
343
