Annotation of sys/arch/m68k/060sp/inetbsd.S, Revision 1.1.1.1
1.1 nbrk 1: #
2: # $OpenBSD: inetbsd.S,v 1.2 1996/05/30 22:14:42 niklas Exp $
3: # $NetBSD: inetbsd.S,v 1.2 1996/05/15 21:16:44 is Exp $
4: #
5: #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
6: # MOTOROLA MICROPROCESSOR & MEMORY TECHNOLOGY GROUP
7: # M68000 Hi-Performance Microprocessor Division
8: # M68060 Software Package Production Release
9: #
10: # M68060 Software Package Copyright (C) 1993, 1994, 1995, 1996 Motorola Inc.
11: # All rights reserved.
12: #
13: # THE SOFTWARE is provided on an "AS IS" basis and without warranty.
14: # To the maximum extent permitted by applicable law,
15: # MOTOROLA DISCLAIMS ALL WARRANTIES WHETHER EXPRESS OR IMPLIED,
16: # INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS
17: # FOR A PARTICULAR PURPOSE and any warranty against infringement with
18: # regard to the SOFTWARE (INCLUDING ANY MODIFIED VERSIONS THEREOF)
19: # and any accompanying written materials.
20: #
21: # To the maximum extent permitted by applicable law,
22: # IN NO EVENT SHALL MOTOROLA BE LIABLE FOR ANY DAMAGES WHATSOEVER
23: # (INCLUDING WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS,
24: # BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR OTHER PECUNIARY LOSS)
25: # ARISING OF THE USE OR INABILITY TO USE THE SOFTWARE.
26: #
27: # Motorola assumes no responsibility for the maintenance and support
28: # of the SOFTWARE.
29: #
30: # You are hereby granted a copyright license to use, modify, and distribute the
31: # SOFTWARE so long as this entire notice is retained without alteration
32: # in any modified and/or redistributed versions, and that such modified
33: # versions are clearly identified as such.
34: # No licenses are granted by implication, estoppel or otherwise under any
35: # patents or trademarks of Motorola, Inc.
36: #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
37: # Derived from:
38: # iskeleton.s
39: #
40: # This file contains:
41: # (1) example "Call-out"s
42: # (2) example package entry code
43: # (3) example "Call-out" table
44: #
45:
46:
47: #################################
48: # (1) EXAMPLE CALL-OUTS #
49: # #
50: # _060_isp_done() #
51: # _060_real_chk() #
52: # _060_real_divbyzero() #
53: # #
54: # _060_real_cas() #
55: # _060_real_cas2() #
56: # _060_real_lock_page() #
57: # _060_real_unlock_page() #
58: #################################
59:
60: #
61: # _060_isp_done():
62: #
63: # This is and example main exit point for the Unimplemented Integer
64: # Instruction exception handler. For a normal exit, the
65: # _isp_unimp() branches to here so that the operating system
66: # can do any clean-up desired. The stack frame is the
67: # Unimplemented Integer Instruction stack frame with
68: # the PC pointing to the instruction following the instruction
69: # just emulated.
70: # To simply continue execution at the next instruction, just
71: # do an "rte".
72: #
73: .global _060_isp_done
74: _060_isp_done:
75: rte
76:
77: #
78: # _060_real_chk():
79: #
80: # This is an alternate exit point for the Unimplemented Integer
81: # Instruction exception handler. If the instruction was a "chk2"
82: # and the operand was out of bounds, then _isp_unimp() creates
83: # a CHK exception stack frame from the Unimplemented Integer Instrcution
84: # stack frame and branches to this routine.
85: #
86: .global _060_real_chk
87: _060_real_chk:
88: tstb sp@ |# is tracing enabled?
89: bpls real_chk_end |# no
90:
91: #
92: # CHK FRAME TRACE FRAME
93: # ***************** *****************
94: # * Current PC * * Current PC *
95: # ***************** *****************
96: # * 0x2 * 0x018 * * 0x2 * 0x024 *
97: # ***************** *****************
98: # * Next * * Next *
99: # * PC * * PC *
100: # ***************** *****************
101: # * SR * * SR *
102: # ***************** *****************
103: #
104: moveb #0x24,sp@(0x7) |# set trace vecno
105: bral _060_real_trace
106:
107: real_chk_end:
108: jmp _chkinst
109:
110: #
111: # _060_real_divbyzero:
112: #
113: # This is an alternate exit point for the Unimplemented Integer
114: # Instruction exception handler isp_unimp(). If the instruction is a 64-bit
115: # integer divide where the source operand is a zero, then the _isp_unimp()
116: # creates a Divide-by-zero exception stack frame from the Unimplemented
117: # Integer Instruction stack frame and branches to this routine.
118: #
119: # Remember that a trace exception may be pending. The code below performs
120: # no action associated with the "chk" exception. If tracing is enabled,
121: # then it create a Trace exception stack frame from the "chk" exception
122: # stack frame and branches to the _real_trace() entry point.
123: #
124: .global _060_real_divbyzero
125: _060_real_divbyzero:
126: tstb sp@ |# is tracing enabled?
127: bpls real_divbyzero_end |# no
128:
129: #
130: # DIVBYZERO FRAME TRACE FRAME
131: # ***************** *****************
132: # * Current PC * * Current PC *
133: # ***************** *****************
134: # * 0x2 * 0x014 * * 0x2 * 0x024 *
135: # ***************** *****************
136: # * Next * * Next *
137: # * PC * * PC *
138: # ***************** *****************
139: # * SR * * SR *
140: # ***************** *****************
141: #
142: moveb #0x24,sp@(0x7) |# set trace vecno
143: bral _060_real_trace
144:
145: real_divbyzero_end:
146: jmp _zerodiv
147:
148: ###########################
149:
150: #
151: # _060_real_cas():
152: #
153: # Entry point for the selected cas emulation code implementation.
154: # If the implementation provided by the 68060ISP is sufficient,
155: # then this routine simply re-enters the package through _isp_cas.
156: #
157: .global _060_real_cas
158: _060_real_cas:
159: bral _I_CALL_TOP+0x80+0x08
160:
161: #
162: # _060_real_cas2():
163: #
164: # Entry point for the selected cas2 emulation code implementation.
165: # If the implementation provided by the 68060ISP is sufficient,
166: # then this routine simply re-enters the package through _isp_cas2.
167: #
168: .global _060_real_cas2
169: _060_real_cas2:
170: bral _I_CALL_TOP+0x80+0x10
171:
172: #
173: # _060_lock_page():
174: #
175: # Entry point for the operating system's routine to "lock" a page
176: # from being paged out. This routine is needed by the cas/cas2
177: # algorithms so that no page faults occur within the "core" code
178: # region. Note: the routine must lock two pages if the operand
179: # spans two pages.
180: # NOTE: THE ROUTINE SHOULD RETURN AN FSLW VALUE IN D0 ON FAILURE
181: # SO THAT THE 060SP CAN CREATE A PROPER ACCESS ERROR FRAME.
182: # Arguments:
183: # a0 = operand address
184: # d0 = `xxxxxxff -> supervisor| `xxxxxx00 -> user
185: # d1 = `xxxxxxff -> longword| `xxxxxx00 -> word
186: # Expected outputs:
187: # d0 = 0 -> success| non-zero -> failure
188: #
189: .global _060_real_lock_page
190: _060_real_lock_page:
191: clrl d0
192: rts
193:
194: #
195: # _060_unlock_page():
196: #
197: # Entry point for the operating system's routine to "unlock" a
198: # page that has been "locked" previously with _real_lock_page.
199: # Note: the routine must unlock two pages if the operand spans
200: # two pages.
201: # Arguments:
202: # a0 = operand address
203: # d0 = `xxxxxxff -> supervisor| `xxxxxx00 -> user
204: # d1 = `xxxxxxff -> longword| `xxxxxx00 -> word
205: #
206: .global _060_real_unlock_page
207: _060_real_unlock_page:
208: clrl d0
209: rts
210:
211: ############################################################################
212:
213: ##################################
214: # (2) EXAMPLE PACKAGE ENTRY CODE #
215: ##################################
216:
217: .global _060_isp_unimp
218: _060_isp_unimp:
219: bral _I_CALL_TOP+0x80+0x00
220:
221: .global _060_isp_cas
222: _060_isp_cas:
223: bral _I_CALL_TOP+0x80+0x08
224:
225: .global _060_isp_cas2
226: _060_isp_cas2:
227: bral _I_CALL_TOP+0x80+0x10
228:
229: .global _060_isp_cas_finish
230: _060_isp_cas_finish:
231: bral _I_CALL_TOP+0x80+0x18
232:
233: .global _060_isp_cas2_finish
234: _060_isp_cas2_finish:
235: bral _I_CALL_TOP+0x80+0x20
236:
237: .global _060_isp_cas_inrange
238: _060_isp_cas_inrange:
239: bral _I_CALL_TOP+0x80+0x28
240:
241: .global _060_isp_cas_terminate
242: _060_isp_cas_terminate:
243: bral _I_CALL_TOP+0x80+0x30
244:
245: .global _060_isp_cas_restart
246: _060_isp_cas_restart:
247: bral _I_CALL_TOP+0x80+0x38
248:
249: ############################################################################
250:
251: ################################
252: # (3) EXAMPLE CALL-OUT SECTION #
253: ################################
254:
255: # The size of this section MUST be 128 bytes!!!
256:
257: .global _I_CALL_TOP
258: _I_CALL_TOP:
259: .long _060_real_chk-_I_CALL_TOP
260: .long _060_real_divbyzero-_I_CALL_TOP
261: .long _060_real_trace-_I_CALL_TOP
262: .long _060_real_access-_I_CALL_TOP
263: .long _060_isp_done-_I_CALL_TOP
264:
265: .long _060_real_cas-_I_CALL_TOP
266: .long _060_real_cas2-_I_CALL_TOP
267: .long _060_real_lock_page-_I_CALL_TOP
268: .long _060_real_unlock_page-_I_CALL_TOP
269:
270: .long 0x00000000,0x00000000,0x00000000,0x00000000
271: .long 0x00000000,0x00000000,0x00000000
272:
273: .long _060_imem_read-_I_CALL_TOP
274: .long _060_dmem_read-_I_CALL_TOP
275: .long _060_dmem_write-_I_CALL_TOP
276: .long _060_imem_read_word-_I_CALL_TOP
277: .long _060_imem_read_long-_I_CALL_TOP
278: .long _060_dmem_read_byte-_I_CALL_TOP
279: .long _060_dmem_read_word-_I_CALL_TOP
280: .long _060_dmem_read_long-_I_CALL_TOP
281: .long _060_dmem_write_byte-_I_CALL_TOP
282: .long _060_dmem_write_word-_I_CALL_TOP
283: .long _060_dmem_write_long-_I_CALL_TOP
284:
285: .long 0x00000000
286: .long 0x00000000,0x00000000,0x00000000,0x00000000
287:
288: ############################################################################
289:
290: # 060 INTEGER KERNEL PACKAGE MUST GO HERE!!!
291:
292: .include "isp.S"
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