ia64/linux-2.6.18-xen.hg

view arch/m68k/ifpsp060/iskeleton.S @ 452:c7ed6fe5dca0

kexec: dont initialise regions in reserve_memory()

There is no need to initialise efi_memmap_res and boot_param_res in
reserve_memory() for the initial xen domain as it is done in
machine_kexec_setup_resources() using values from the kexec hypercall.

Signed-off-by: Simon Horman <horms@verge.net.au>
author Keir Fraser <keir.fraser@citrix.com>
date Thu Feb 28 10:55:18 2008 +0000 (2008-02-28)
parents 831230e53067
children
line source
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 | iskeleton.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 |
37 #include <linux/linkage.h>
38 #include <asm/entry.h>
39 #include <asm/asm-offsets.h>
42 |################################
43 | (1) EXAMPLE CALL-OUTS #
44 | #
45 | _060_isp_done() #
46 | _060_real_chk() #
47 | _060_real_divbyzero() #
48 | #
49 | _060_real_cas() #
50 | _060_real_cas2() #
51 | _060_real_lock_page() #
52 | _060_real_unlock_page() #
53 |################################
55 |
56 | _060_isp_done():
57 |
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
64 | just emulated.
65 | To simply continue execution at the next instruction, just
66 | do an "rte".
67 |
68 | Linux/68k: If returning to user space, check for needed reselections.
70 .global _060_isp_done
71 _060_isp_done:
72 btst #0x5,%sp@ | supervisor bit set in saved SR?
73 beq .Lnotkern
74 rte
75 .Lnotkern:
76 SAVE_ALL_INT
77 GET_CURRENT(%d0)
78 | deliver signals, reschedule etc..
79 jra ret_from_exception
81 |
82 | _060_real_chk():
83 |
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.
89 |
90 | Linux/68k: commented out test for tracing
92 .global _060_real_chk
93 _060_real_chk:
94 | tst.b (%sp) | is tracing enabled?
95 | bpls real_chk_end | no
97 |
98 | CHK FRAME TRACE FRAME
99 | ***************** *****************
100 | * Current PC * * Current PC *
101 | ***************** *****************
102 | * 0x2 * 0x018 * * 0x2 * 0x024 *
103 | ***************** *****************
104 | * Next * * Next *
105 | * PC * * PC *
106 | ***************** *****************
107 | * SR * * SR *
108 | ***************** *****************
109 |
110 | move.b #0x24,0x7(%sp) | set trace vecno
111 | bral _060_real_trace
113 real_chk_end:
114 bral trap | jump to trap handler
116 |
117 | _060_real_divbyzero:
118 |
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.
124 |
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.
129 |
130 | Linux/68k: commented out test for tracing
132 .global _060_real_divbyzero
133 _060_real_divbyzero:
134 | tst.b (%sp) | is tracing enabled?
135 | bpls real_divbyzero_end | no
137 |
138 | DIVBYZERO FRAME TRACE FRAME
139 | ***************** *****************
140 | * Current PC * * Current PC *
141 | ***************** *****************
142 | * 0x2 * 0x014 * * 0x2 * 0x024 *
143 | ***************** *****************
144 | * Next * * Next *
145 | * PC * * PC *
146 | ***************** *****************
147 | * SR * * SR *
148 | ***************** *****************
149 |
150 | move.b #0x24,0x7(%sp) | set trace vecno
151 | bral _060_real_trace
153 real_divbyzero_end:
154 bral trap | jump to trap handler
156 |##########################
158 |
159 | _060_real_cas():
160 |
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.
164 |
165 .global _060_real_cas
166 _060_real_cas:
167 bral _I_CALL_TOP+0x80+0x08
169 |
170 | _060_real_cas2():
171 |
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.
175 |
176 .global _060_real_cas2
177 _060_real_cas2:
178 bral _I_CALL_TOP+0x80+0x10
180 |
181 | _060_lock_page():
182 |
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
187 | spans two pages.
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.
190 | Arguments:
191 | a0 = operand address
192 | d0 = `xxxxxxff -> supervisor; `xxxxxx00 -> user
193 | d1 = `xxxxxxff -> longword; `xxxxxx00 -> word
194 | Expected outputs:
195 | d0 = 0 -> success; non-zero -> failure
196 |
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.
200 |
201 .global _060_real_lock_page
202 _060_real_lock_page:
203 move.l %d2,-(%sp)
204 | load sfc/dfc
205 tst.b %d0
206 jne 1f
207 moveq #1,%d0
208 jra 2f
209 1: moveq #5,%d0
210 2: movec.l %dfc,%d2
211 movec.l %d0,%dfc
212 movec.l %d0,%sfc
214 clr.l %d0
215 | prefetch address
216 .chip 68060
217 move.l %a0,%a1
218 1: plpaw (%a1)
219 addq.w #1,%a0
220 tst.b %d1
221 jeq 2f
222 addq.w #2,%a0
223 2: plpaw (%a0)
224 3: .chip 68k
226 | restore sfc/dfc
227 movec.l %d2,%dfc
228 movec.l %d2,%sfc
229 move.l (%sp)+,%d2
230 rts
232 .section __ex_table,"a"
233 .align 4
234 .long 1b,11f
235 .long 2b,21f
236 .previous
237 .section .fixup,"ax"
238 .even
239 11: move.l #0x020003c0,%d0
240 or.l %d2,%d0
241 swap %d0
242 jra 3b
243 21: move.l #0x02000bc0,%d0
244 or.l %d2,%d0
245 swap %d0
246 jra 3b
247 .previous
249 |
250 | _060_unlock_page():
251 |
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
255 | two pages.
256 | Arguments:
257 | a0 = operand address
258 | d0 = `xxxxxxff -> supervisor; `xxxxxx00 -> user
259 | d1 = `xxxxxxff -> longword; `xxxxxx00 -> word
260 |
261 | Linux/m68k: perhaps reenable preemption here...
263 .global _060_real_unlock_page
264 _060_real_unlock_page:
265 clr.l %d0
266 rts
268 |###########################################################################
270 |#################################
271 | (2) EXAMPLE PACKAGE ENTRY CODE #
272 |#################################
274 .global _060_isp_unimp
275 _060_isp_unimp:
276 bral _I_CALL_TOP+0x80+0x00
278 .global _060_isp_cas
279 _060_isp_cas:
280 bral _I_CALL_TOP+0x80+0x08
282 .global _060_isp_cas2
283 _060_isp_cas2:
284 bral _I_CALL_TOP+0x80+0x10
286 .global _060_isp_cas_finish
287 _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!!!
314 _I_CALL_TOP:
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
341 .long 0x00000000
342 .long 0x00000000, 0x00000000, 0x00000000, 0x00000000
344 |###########################################################################
346 | 060 INTEGER KERNEL PACKAGE MUST GO HERE!!!
347 #include "isp.sa"