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
7 |M68060 Software Package Copyright © 1993, 1994 Motorola Inc. All rights reserved.
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.
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.
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 |~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
32 | (1) example "Call-out"s
33 | (2) example package entry code
34 | (3) example "Call-out" table
37 #include <linux/linkage.h>
38 #include <asm/entry.h>
39 #include <asm/asm-offsets.h>
42 |################################
43 | (1) EXAMPLE CALL-OUTS #
47 | _060_real_divbyzero() #
51 | _060_real_lock_page() #
52 | _060_real_unlock_page() #
53 |################################
58 | This is and example main exit point for the Unimplemented Integer
59 | Instruction exception handler. For a normal exit, the
60 | _isp_unimp() branches to here so that the operating system
61 | can do any clean-up desired. The stack frame is the
62 | Unimplemented Integer Instruction stack frame with
63 | the PC pointing to the instruction following the instruction
65 | To simply continue execution at the next instruction, just
68 | Linux/68k: If returning to user space, check for needed reselections.
72 btst #0x5,%sp@ | supervisor bit set in saved SR?
78 | deliver signals, reschedule etc..
79 jra ret_from_exception
84 | This is an alternate exit point for the Unimplemented Integer
85 | Instruction exception handler. If the instruction was a "chk2"
86 | and the operand was out of bounds, then _isp_unimp() creates
87 | a CHK exception stack frame from the Unimplemented Integer Instrcution
88 | stack frame and branches to this routine.
90 | Linux/68k: commented out test for tracing
94 | tst.b (%sp) | is tracing enabled?
95 | bpls real_chk_end | no
98 | CHK FRAME TRACE FRAME
99 | ***************** *****************
100 | * Current PC * * Current PC *
101 | ***************** *****************
102 | * 0x2 * 0x018 * * 0x2 * 0x024 *
103 | ***************** *****************
106 | ***************** *****************
108 | ***************** *****************
110 | move.b #0x24,0x7(%sp) | set trace vecno
111 | bral _060_real_trace
114 bral trap | jump to trap handler
117 | _060_real_divbyzero:
119 | This is an alternate exit point for the Unimplemented Integer
120 | Instruction exception handler isp_unimp(). If the instruction is a 64-bit
121 | integer divide where the source operand is a zero, then the _isp_unimp()
122 | creates a Divide-by-zero exception stack frame from the Unimplemented
123 | Integer Instruction stack frame and branches to this routine.
125 | Remember that a trace exception may be pending. The code below performs
126 | no action associated with the "chk" exception. If tracing is enabled,
127 | then it create a Trace exception stack frame from the "chk" exception
128 | stack frame and branches to the _real_trace() entry point.
130 | Linux/68k: commented out test for tracing
132 .global _060_real_divbyzero
134 | tst.b (%sp) | is tracing enabled?
135 | bpls real_divbyzero_end | no
138 | DIVBYZERO FRAME TRACE FRAME
139 | ***************** *****************
140 | * Current PC * * Current PC *
141 | ***************** *****************
142 | * 0x2 * 0x014 * * 0x2 * 0x024 *
143 | ***************** *****************
146 | ***************** *****************
148 | ***************** *****************
150 | move.b #0x24,0x7(%sp) | set trace vecno
151 | bral _060_real_trace
154 bral trap | jump to trap handler
156 |##########################
161 | Entry point for the selected cas emulation code implementation.
162 | If the implementation provided by the 68060ISP is sufficient,
163 | then this routine simply re-enters the package through _isp_cas.
165 .global _060_real_cas
167 bral _I_CALL_TOP+0x80+0x08
172 | Entry point for the selected cas2 emulation code implementation.
173 | If the implementation provided by the 68060ISP is sufficient,
174 | then this routine simply re-enters the package through _isp_cas2.
176 .global _060_real_cas2
178 bral _I_CALL_TOP+0x80+0x10
183 | Entry point for the operating system`s routine to "lock" a page
184 | from being paged out. This routine is needed by the cas/cas2
185 | algorithms so that no page faults occur within the "core" code
186 | region. Note: the routine must lock two pages if the operand
188 | NOTE: THE ROUTINE SHOULD RETURN AN FSLW VALUE IN D0 ON FAILURE
189 | SO THAT THE 060SP CAN CREATE A PROPER ACCESS ERROR FRAME.
191 | a0 = operand address
192 | d0 = `xxxxxxff -> supervisor; `xxxxxx00 -> user
193 | d1 = `xxxxxxff -> longword; `xxxxxx00 -> word
195 | d0 = 0 -> success; non-zero -> failure
197 | Linux/m68k: Make sure the page is properly paged in, so we use
198 | plpaw and handle any exception here. The kernel must not be
199 | preempted until _060_unlock_page(), so that the page stays mapped.
201 .global _060_real_lock_page
232 .section __ex_table,"a"
239 11: move.l #0x020003c0,%d0
243 21: move.l #0x02000bc0,%d0
250 | _060_unlock_page():
252 | Entry point for the operating system`s routine to "unlock" a
253 | page that has been "locked" previously with _real_lock_page.
254 | Note: the routine must unlock two pages if the operand spans
257 | a0 = operand address
258 | d0 = `xxxxxxff -> supervisor; `xxxxxx00 -> user
259 | d1 = `xxxxxxff -> longword; `xxxxxx00 -> word
261 | Linux/m68k: perhaps reenable preemption here...
263 .global _060_real_unlock_page
264 _060_real_unlock_page:
268 |###########################################################################
270 |#################################
271 | (2) EXAMPLE PACKAGE ENTRY CODE #
272 |#################################
274 .global _060_isp_unimp
276 bral _I_CALL_TOP+0x80+0x00
280 bral _I_CALL_TOP+0x80+0x08
282 .global _060_isp_cas2
284 bral _I_CALL_TOP+0x80+0x10
286 .global _060_isp_cas_finish
288 bra.l _I_CALL_TOP+0x80+0x18
290 .global _060_isp_cas2_finish
291 _060_isp_cas2_finish:
292 bral _I_CALL_TOP+0x80+0x20
294 .global _060_isp_cas_inrange
295 _060_isp_cas_inrange:
296 bral _I_CALL_TOP+0x80+0x28
298 .global _060_isp_cas_terminate
299 _060_isp_cas_terminate:
300 bral _I_CALL_TOP+0x80+0x30
302 .global _060_isp_cas_restart
303 _060_isp_cas_restart:
304 bral _I_CALL_TOP+0x80+0x38
306 |###########################################################################
308 |###############################
309 | (3) EXAMPLE CALL-OUT SECTION #
310 |###############################
312 | The size of this section MUST be 128 bytes!!!
315 .long _060_real_chk - _I_CALL_TOP
316 .long _060_real_divbyzero - _I_CALL_TOP
317 .long _060_real_trace - _I_CALL_TOP
318 .long _060_real_access - _I_CALL_TOP
319 .long _060_isp_done - _I_CALL_TOP
321 .long _060_real_cas - _I_CALL_TOP
322 .long _060_real_cas2 - _I_CALL_TOP
323 .long _060_real_lock_page - _I_CALL_TOP
324 .long _060_real_unlock_page - _I_CALL_TOP
326 .long 0x00000000, 0x00000000, 0x00000000, 0x00000000
327 .long 0x00000000, 0x00000000, 0x00000000
329 .long _060_imem_read - _I_CALL_TOP
330 .long _060_dmem_read - _I_CALL_TOP
331 .long _060_dmem_write - _I_CALL_TOP
332 .long _060_imem_read_word - _I_CALL_TOP
333 .long _060_imem_read_long - _I_CALL_TOP
334 .long _060_dmem_read_byte - _I_CALL_TOP
335 .long _060_dmem_read_word - _I_CALL_TOP
336 .long _060_dmem_read_long - _I_CALL_TOP
337 .long _060_dmem_write_byte - _I_CALL_TOP
338 .long _060_dmem_write_word - _I_CALL_TOP
339 .long _060_dmem_write_long - _I_CALL_TOP
342 .long 0x00000000, 0x00000000, 0x00000000, 0x00000000
344 |###########################################################################
346 | 060 INTEGER KERNEL PACKAGE MUST GO HERE!!!