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authorPaul Mackerras <paulus@samba.org>2005-11-07 19:14:20 -0500
committerPaul Mackerras <paulus@samba.org>2005-11-07 19:14:20 -0500
commit24bfb00123e82a2e70bd115277d922438813515b (patch)
tree27328b8a5718e16d64e2d101f4b7ddcad5930aed /arch/s390/kernel/head64.S
parentc6135234550ed89a6fd0e8cb229633967e41d649 (diff)
parent3f00d3e8fb963968a922d821a9a53b503b687e81 (diff)
Merge ../linux-2.6
Diffstat (limited to 'arch/s390/kernel/head64.S')
-rw-r--r--arch/s390/kernel/head64.S543
1 files changed, 11 insertions, 532 deletions
diff --git a/arch/s390/kernel/head64.S b/arch/s390/kernel/head64.S
index 193aafa72f54..f08c06f45d5c 100644
--- a/arch/s390/kernel/head64.S
+++ b/arch/s390/kernel/head64.S
@@ -1,482 +1,17 @@
1/* 1/*
2 * arch/s390/kernel/head.S 2 * arch/s390/kernel/head64.S
3 * 3 *
4 * S390 version 4 * (C) Copyright IBM Corp. 1999,2005
5 * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation 5 *
6 * Author(s): Hartmut Penner (hp@de.ibm.com), 6 * Author(s): Hartmut Penner <hp@de.ibm.com>
7 * Martin Schwidefsky (schwidefsky@de.ibm.com), 7 * Martin Schwidefsky <schwidefsky@de.ibm.com>
8 * Rob van der Heij (rvdhei@iae.nl) 8 * Rob van der Heij <rvdhei@iae.nl>
9 * Heiko Carstens <heiko.carstens@de.ibm.com>
9 * 10 *
10 * There are 5 different IPL methods
11 * 1) load the image directly into ram at address 0 and do an PSW restart
12 * 2) linload will load the image from address 0x10000 to memory 0x10000
13 * and start the code thru LPSW 0x0008000080010000 (VM only, deprecated)
14 * 3) generate the tape ipl header, store the generated image on a tape
15 * and ipl from it
16 * In case of SL tape you need to IPL 5 times to get past VOL1 etc
17 * 4) generate the vm reader ipl header, move the generated image to the
18 * VM reader (use option NOH!) and do a ipl from reader (VM only)
19 * 5) direct call of start by the SALIPL loader
20 * We use the cpuid to distinguish between VM and native ipl
21 * params for kernel are pushed to 0x10400 (see setup.h)
22
23 Changes:
24 Okt 25 2000 <rvdheij@iae.nl>
25 added code to skip HDR and EOF to allow SL tape IPL (5 retries)
26 changed first CCW from rewind to backspace block
27
28 */ 11 */
29 12
30#include <linux/config.h>
31#include <asm/setup.h>
32#include <asm/lowcore.h>
33#include <asm/asm-offsets.h>
34#include <asm/thread_info.h>
35#include <asm/page.h>
36
37#ifndef CONFIG_IPL
38 .org 0
39 .long 0x00080000,0x80000000+startup # Just a restart PSW
40#else
41#ifdef CONFIG_IPL_TAPE
42#define IPL_BS 1024
43 .org 0
44 .long 0x00080000,0x80000000+iplstart # The first 24 bytes are loaded
45 .long 0x27000000,0x60000001 # by ipl to addresses 0-23.
46 .long 0x02000000,0x20000000+IPL_BS # (a PSW and two CCWs).
47 .long 0x00000000,0x00000000 # external old psw
48 .long 0x00000000,0x00000000 # svc old psw
49 .long 0x00000000,0x00000000 # program check old psw
50 .long 0x00000000,0x00000000 # machine check old psw
51 .long 0x00000000,0x00000000 # io old psw
52 .long 0x00000000,0x00000000
53 .long 0x00000000,0x00000000
54 .long 0x00000000,0x00000000
55 .long 0x000a0000,0x00000058 # external new psw
56 .long 0x000a0000,0x00000060 # svc new psw
57 .long 0x000a0000,0x00000068 # program check new psw
58 .long 0x000a0000,0x00000070 # machine check new psw
59 .long 0x00080000,0x80000000+.Lioint # io new psw
60
61 .org 0x100
62#
63# subroutine for loading from tape
64# Paramters:
65# R1 = device number
66# R2 = load address
67.Lloader:
68 st %r14,.Lldret
69 la %r3,.Lorbread # r3 = address of orb
70 la %r5,.Lirb # r5 = address of irb
71 st %r2,.Lccwread+4 # initialize CCW data addresses
72 lctl %c6,%c6,.Lcr6
73 slr %r2,%r2
74.Lldlp:
75 la %r6,3 # 3 retries
76.Lssch:
77 ssch 0(%r3) # load chunk of IPL_BS bytes
78 bnz .Llderr
79.Lw4end:
80 bas %r14,.Lwait4io
81 tm 8(%r5),0x82 # do we have a problem ?
82 bnz .Lrecov
83 slr %r7,%r7
84 icm %r7,3,10(%r5) # get residual count
85 lcr %r7,%r7
86 la %r7,IPL_BS(%r7) # IPL_BS-residual=#bytes read
87 ar %r2,%r7 # add to total size
88 tm 8(%r5),0x01 # found a tape mark ?
89 bnz .Ldone
90 l %r0,.Lccwread+4 # update CCW data addresses
91 ar %r0,%r7
92 st %r0,.Lccwread+4
93 b .Lldlp
94.Ldone:
95 l %r14,.Lldret
96 br %r14 # r2 contains the total size
97.Lrecov:
98 bas %r14,.Lsense # do the sensing
99 bct %r6,.Lssch # dec. retry count & branch
100 b .Llderr
101#
102# Sense subroutine
103#
104.Lsense:
105 st %r14,.Lsnsret
106 la %r7,.Lorbsense
107 ssch 0(%r7) # start sense command
108 bnz .Llderr
109 bas %r14,.Lwait4io
110 l %r14,.Lsnsret
111 tm 8(%r5),0x82 # do we have a problem ?
112 bnz .Llderr
113 br %r14
114#
115# Wait for interrupt subroutine
116#
117.Lwait4io:
118 lpsw .Lwaitpsw
119.Lioint:
120 c %r1,0xb8 # compare subchannel number
121 bne .Lwait4io
122 tsch 0(%r5)
123 slr %r0,%r0
124 tm 8(%r5),0x82 # do we have a problem ?
125 bnz .Lwtexit
126 tm 8(%r5),0x04 # got device end ?
127 bz .Lwait4io
128.Lwtexit:
129 br %r14
130.Llderr:
131 lpsw .Lcrash
132
133 .align 8
134.Lorbread:
135 .long 0x00000000,0x0080ff00,.Lccwread
136 .align 8
137.Lorbsense:
138 .long 0x00000000,0x0080ff00,.Lccwsense
139 .align 8
140.Lccwread:
141 .long 0x02200000+IPL_BS,0x00000000
142.Lccwsense:
143 .long 0x04200001,0x00000000
144.Lwaitpsw:
145 .long 0x020a0000,0x80000000+.Lioint
146
147.Lirb: .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
148.Lcr6: .long 0xff000000
149 .align 8
150.Lcrash:.long 0x000a0000,0x00000000
151.Lldret:.long 0
152.Lsnsret: .long 0
153#endif /* CONFIG_IPL_TAPE */
154
155#ifdef CONFIG_IPL_VM
156#define IPL_BS 0x730
157 .org 0
158 .long 0x00080000,0x80000000+iplstart # The first 24 bytes are loaded
159 .long 0x02000018,0x60000050 # by ipl to addresses 0-23.
160 .long 0x02000068,0x60000050 # (a PSW and two CCWs).
161 .fill 80-24,1,0x40 # bytes 24-79 are discarded !!
162 .long 0x020000f0,0x60000050 # The next 160 byte are loaded
163 .long 0x02000140,0x60000050 # to addresses 0x18-0xb7
164 .long 0x02000190,0x60000050 # They form the continuation
165 .long 0x020001e0,0x60000050 # of the CCW program started
166 .long 0x02000230,0x60000050 # by ipl and load the range
167 .long 0x02000280,0x60000050 # 0x0f0-0x730 from the image
168 .long 0x020002d0,0x60000050 # to the range 0x0f0-0x730
169 .long 0x02000320,0x60000050 # in memory. At the end of
170 .long 0x02000370,0x60000050 # the channel program the PSW
171 .long 0x020003c0,0x60000050 # at location 0 is loaded.
172 .long 0x02000410,0x60000050 # Initial processing starts
173 .long 0x02000460,0x60000050 # at 0xf0 = iplstart.
174 .long 0x020004b0,0x60000050
175 .long 0x02000500,0x60000050
176 .long 0x02000550,0x60000050
177 .long 0x020005a0,0x60000050
178 .long 0x020005f0,0x60000050
179 .long 0x02000640,0x60000050
180 .long 0x02000690,0x60000050
181 .long 0x020006e0,0x20000050
182
183 .org 0xf0
184#
185# subroutine for loading cards from the reader
186#
187.Lloader:
188 la %r3,.Lorb # r2 = address of orb into r2
189 la %r5,.Lirb # r4 = address of irb
190 la %r6,.Lccws
191 la %r7,20
192.Linit:
193 st %r2,4(%r6) # initialize CCW data addresses
194 la %r2,0x50(%r2)
195 la %r6,8(%r6)
196 bct 7,.Linit
197
198 lctl %c6,%c6,.Lcr6 # set IO subclass mask
199 slr %r2,%r2
200.Lldlp:
201 ssch 0(%r3) # load chunk of 1600 bytes
202 bnz .Llderr
203.Lwait4irq:
204 mvc 0x78(8),.Lnewpsw # set up IO interrupt psw
205 lpsw .Lwaitpsw
206.Lioint:
207 c %r1,0xb8 # compare subchannel number
208 bne .Lwait4irq
209 tsch 0(%r5)
210
211 slr %r0,%r0
212 ic %r0,8(%r5) # get device status
213 chi %r0,8 # channel end ?
214 be .Lcont
215 chi %r0,12 # channel end + device end ?
216 be .Lcont
217
218 l %r0,4(%r5)
219 s %r0,8(%r3) # r0/8 = number of ccws executed
220 mhi %r0,10 # *10 = number of bytes in ccws
221 lh %r3,10(%r5) # get residual count
222 sr %r0,%r3 # #ccws*80-residual=#bytes read
223 ar %r2,%r0
224
225 br %r14 # r2 contains the total size
226
227.Lcont:
228 ahi %r2,0x640 # add 0x640 to total size
229 la %r6,.Lccws
230 la %r7,20
231.Lincr:
232 l %r0,4(%r6) # update CCW data addresses
233 ahi %r0,0x640
234 st %r0,4(%r6)
235 ahi %r6,8
236 bct 7,.Lincr
237
238 b .Lldlp
239.Llderr:
240 lpsw .Lcrash
241
242 .align 8
243.Lorb: .long 0x00000000,0x0080ff00,.Lccws
244.Lirb: .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
245.Lcr6: .long 0xff000000
246.Lloadp:.long 0,0
247 .align 8
248.Lcrash:.long 0x000a0000,0x00000000
249.Lnewpsw:
250 .long 0x00080000,0x80000000+.Lioint
251.Lwaitpsw:
252 .long 0x020a0000,0x80000000+.Lioint
253
254 .align 8
255.Lccws: .rept 19
256 .long 0x02600050,0x00000000
257 .endr
258 .long 0x02200050,0x00000000
259#endif /* CONFIG_IPL_VM */
260
261iplstart:
262 lh %r1,0xb8 # test if subchannel number
263 bct %r1,.Lnoload # is valid
264 l %r1,0xb8 # load ipl subchannel number
265 la %r2,IPL_BS # load start address
266 bas %r14,.Lloader # load rest of ipl image
267 larl %r12,_pstart # pointer to parameter area
268 st %r1,IPL_DEVICE+4-PARMAREA(%r12) # store ipl device number
269
270#
271# load parameter file from ipl device
272# 13#
273.Lagain1: 14# startup-code at 0x10000, running in absolute addressing mode
274 l %r2,INITRD_START+4-PARMAREA(%r12)# use ramdisk location as temp
275 bas %r14,.Lloader # load parameter file
276 ltr %r2,%r2 # got anything ?
277 bz .Lnopf
278 chi %r2,895
279 bnh .Lnotrunc
280 la %r2,895
281.Lnotrunc:
282 l %r4,INITRD_START+4-PARMAREA(%r12)
283 clc 0(3,%r4),.L_hdr # if it is HDRx
284 bz .Lagain1 # skip dataset header
285 clc 0(3,%r4),.L_eof # if it is EOFx
286 bz .Lagain1 # skip dateset trailer
287 la %r5,0(%r4,%r2)
288 lr %r3,%r2
289.Lidebc:
290 tm 0(%r5),0x80 # high order bit set ?
291 bo .Ldocv # yes -> convert from EBCDIC
292 ahi %r5,-1
293 bct %r3,.Lidebc
294 b .Lnocv
295.Ldocv:
296 l %r3,.Lcvtab
297 tr 0(256,%r4),0(%r3) # convert parameters to ascii
298 tr 256(256,%r4),0(%r3)
299 tr 512(256,%r4),0(%r3)
300 tr 768(122,%r4),0(%r3)
301.Lnocv: la %r3,COMMAND_LINE-PARMAREA(%r12) # load adr. of command line
302 mvc 0(256,%r3),0(%r4)
303 mvc 256(256,%r3),256(%r4)
304 mvc 512(256,%r3),512(%r4)
305 mvc 768(122,%r3),768(%r4)
306 slr %r0,%r0
307 b .Lcntlp
308.Ldelspc:
309 ic %r0,0(%r2,%r3)
310 chi %r0,0x20 # is it a space ?
311 be .Lcntlp
312 ahi %r2,1
313 b .Leolp
314.Lcntlp:
315 brct %r2,.Ldelspc
316.Leolp:
317 slr %r0,%r0
318 stc %r0,0(%r2,%r3) # terminate buffer
319.Lnopf:
320
321#
322# load ramdisk from ipl device
323#
324.Lagain2:
325 l %r2,INITRD_START+4-PARMAREA(%r12)# load adr. of ramdisk
326 bas %r14,.Lloader # load ramdisk
327 st %r2,INITRD_SIZE+4-PARMAREA(%r12) # store size of ramdisk
328 ltr %r2,%r2
329 bnz .Lrdcont
330 st %r2,INITRD_START+4-PARMAREA(%r12)# no ramdisk found, null it
331.Lrdcont:
332 l %r2,INITRD_START+4-PARMAREA(%r12)
333 clc 0(3,%r2),.L_hdr # skip HDRx and EOFx
334 bz .Lagain2
335 clc 0(3,%r2),.L_eof
336 bz .Lagain2
337
338#ifdef CONFIG_IPL_VM
339#
340# reset files in VM reader
341#
342 stidp __LC_CPUID # store cpuid
343 tm __LC_CPUID,0xff # running VM ?
344 bno .Lnoreset
345 la %r2,.Lreset
346 lhi %r3,26
347 diag %r2,%r3,8
348 la %r5,.Lirb
349 stsch 0(%r5) # check if irq is pending
350 tm 30(%r5),0x0f # by verifying if any of the
351 bnz .Lwaitforirq # activity or status control
352 tm 31(%r5),0xff # bits is set in the schib
353 bz .Lnoreset
354.Lwaitforirq:
355 mvc 0x78(8),.Lrdrnewpsw # set up IO interrupt psw
356.Lwaitrdrirq:
357 lpsw .Lrdrwaitpsw
358.Lrdrint:
359 c %r1,0xb8 # compare subchannel number
360 bne .Lwaitrdrirq
361 la %r5,.Lirb
362 tsch 0(%r5)
363.Lnoreset:
364 b .Lnoload
365
366 .align 8
367.Lrdrnewpsw:
368 .long 0x00080000,0x80000000+.Lrdrint
369.Lrdrwaitpsw:
370 .long 0x020a0000,0x80000000+.Lrdrint
371#endif
372
373#
374# everything loaded, go for it
375#
376.Lnoload:
377 l %r1,.Lstartup
378 br %r1
379
380.Lstartup: .long startup
381.Lcvtab:.long _ebcasc # ebcdic to ascii table
382.Lreset:.byte 0xc3,0xc8,0xc1,0xd5,0xc7,0xc5,0x40,0xd9,0xc4,0xd9,0x40
383 .byte 0xc1,0xd3,0xd3,0x40,0xd2,0xc5,0xc5,0xd7,0x40,0xd5,0xd6
384 .byte 0xc8,0xd6,0xd3,0xc4 # "change rdr all keep nohold"
385.L_eof: .long 0xc5d6c600 /* C'EOF' */
386.L_hdr: .long 0xc8c4d900 /* C'HDR' */
387#endif /* CONFIG_IPL */
388
389#
390# SALIPL loader support. Based on a patch by Rob van der Heij.
391# This entry point is called directly from the SALIPL loader and
392# doesn't need a builtin ipl record.
393#
394 .org 0x800
395 .globl start
396start:
397 stm %r0,%r15,0x07b0 # store registers
398 basr %r12,%r0
399.base:
400 l %r11,.parm
401 l %r8,.cmd # pointer to command buffer
402
403 ltr %r9,%r9 # do we have SALIPL parameters?
404 bp .sk8x8
405
406 mvc 0(64,%r8),0x00b0 # copy saved registers
407 xc 64(240-64,%r8),0(%r8) # remainder of buffer
408 tr 0(64,%r8),.lowcase
409 b .gotr
410.sk8x8:
411 mvc 0(240,%r8),0(%r9) # copy iplparms into buffer
412.gotr:
413 l %r10,.tbl # EBCDIC to ASCII table
414 tr 0(240,%r8),0(%r10)
415 stidp __LC_CPUID # Are we running on VM maybe
416 cli __LC_CPUID,0xff
417 bnz .test
418 .long 0x83300060 # diag 3,0,x'0060' - storage size
419 b .done
420.test:
421 mvc 0x68(8),.pgmnw # set up pgm check handler
422 l %r2,.fourmeg
423 lr %r3,%r2
424 bctr %r3,%r0 # 4M-1
425.loop: iske %r0,%r3
426 ar %r3,%r2
427.pgmx:
428 sr %r3,%r2
429 la %r3,1(%r3)
430.done:
431 l %r1,.memsize
432 st %r3,4(%r1)
433 slr %r0,%r0
434 st %r0,INITRD_SIZE+4-PARMAREA(%r11)
435 st %r0,INITRD_START+4-PARMAREA(%r11)
436 j startup # continue with startup
437.tbl: .long _ebcasc # translate table
438.cmd: .long COMMAND_LINE # address of command line buffer
439.parm: .long PARMAREA
440.fourmeg: .long 0x00400000 # 4M
441.pgmnw: .long 0x00080000,.pgmx
442.memsize: .long memory_size
443.lowcase:
444 .byte 0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07
445 .byte 0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f
446 .byte 0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17
447 .byte 0x18,0x19,0x1a,0x1b,0x1c,0x1d,0x1e,0x1f
448 .byte 0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27
449 .byte 0x28,0x29,0x2a,0x2b,0x2c,0x2d,0x2e,0x2f
450 .byte 0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37
451 .byte 0x38,0x39,0x3a,0x3b,0x3c,0x3d,0x3e,0x3f
452 .byte 0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47
453 .byte 0x48,0x49,0x4a,0x4b,0x4c,0x4d,0x4e,0x4f
454 .byte 0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57
455 .byte 0x58,0x59,0x5a,0x5b,0x5c,0x5d,0x5e,0x5f
456 .byte 0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67
457 .byte 0x68,0x69,0x6a,0x6b,0x6c,0x6d,0x6e,0x6f
458 .byte 0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77
459 .byte 0x78,0x79,0x7a,0x7b,0x7c,0x7d,0x7e,0x7f
460
461 .byte 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87
462 .byte 0x88,0x89,0x8a,0x8b,0x8c,0x8d,0x8e,0x8f
463 .byte 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97
464 .byte 0x98,0x99,0x9a,0x9b,0x9c,0x9d,0x9e,0x9f
465 .byte 0xa0,0xa1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7
466 .byte 0xa8,0xa9,0xaa,0xab,0xac,0xad,0xae,0xaf
467 .byte 0xb0,0xb1,0xb2,0xb3,0xb4,0xb5,0xb6,0xb7
468 .byte 0xb8,0xb9,0xba,0xbb,0xbc,0xbd,0xbe,0xbf
469 .byte 0xc0,0x81,0x82,0x83,0x84,0x85,0x86,0x87 # .abcdefg
470 .byte 0x88,0x89,0xca,0xcb,0xcc,0xcd,0xce,0xcf # hi
471 .byte 0xd0,0x91,0x92,0x93,0x94,0x95,0x96,0x97 # .jklmnop
472 .byte 0x98,0x99,0xda,0xdb,0xdc,0xdd,0xde,0xdf # qr
473 .byte 0xe0,0xe1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7 # ..stuvwx
474 .byte 0xa8,0xa9,0xea,0xeb,0xec,0xed,0xee,0xef # yz
475 .byte 0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7
476 .byte 0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfe,0xff
477
478#
479# startup-code at 0x10000, running in real mode
480# this is called either by the ipl loader or directly by PSW restart 15# this is called either by the ipl loader or directly by PSW restart
481# or linload or SALIPL 16# or linload or SALIPL
482# 17#
@@ -530,7 +65,7 @@ startup:basr %r13,0 # get base
530 be .Lfchunk-.LPG1(%r13) # leave 65 be .Lfchunk-.LPG1(%r13) # leave
531 chi %r1,2 66 chi %r1,2
532 be .Lservicecall-.LPG1(%r13) 67 be .Lservicecall-.LPG1(%r13)
533 lpsw .Lwaitsclp-.LPG1(%r13) 68 lpswe .Lwaitsclp-.LPG1(%r13)
534.Lsclph: 69.Lsclph:
535 lh %r1,.Lsccbr-PARMAREA(%r4) 70 lh %r1,.Lsccbr-PARMAREA(%r4)
536 chi %r1,0x10 # 0x0010 is the sucess code 71 chi %r1,0x10 # 0x0010 is the sucess code
@@ -567,8 +102,7 @@ startup:basr %r13,0 # get base
567.Lcr: 102.Lcr:
568 .quad 0x00 # place holder for cr0 103 .quad 0x00 # place holder for cr0
569.Lwaitsclp: 104.Lwaitsclp:
570 .long 0x020A0000 105 .quad 0x0102000180000000,.Lsclph
571 .quad .Lsclph
572.Lrcp: 106.Lrcp:
573 .int 0x00120001 # Read SCP forced code 107 .int 0x00120001 # Read SCP forced code
574.Lrcp2: 108.Lrcp2:
@@ -751,62 +285,7 @@ _pstart:
751 .global _pend 285 .global _pend
752_pend: 286_pend:
753 287
754.Lget_ipl_device: 288 GET_IPL_DEVICE
755 basr %r12,0
756.LPG2: l %r1,0xb8 # get sid
757 sll %r1,15 # test if subchannel is enabled
758 srl %r1,31
759 ltr %r1,%r1
760 bz 0(%r14) # subchannel disabled
761 l %r1,0xb8
762 la %r5,.Lipl_schib-.LPG2(%r12)
763 stsch 0(%r5) # get schib of subchannel
764 bnz 0(%r14) # schib not available
765 tm 5(%r5),0x01 # devno valid?
766 bno 0(%r14)
767 la %r6,ipl_parameter_flags-.LPG2(%r12)
768 oi 3(%r6),0x01 # set flag
769 la %r2,ipl_devno-.LPG2(%r12)
770 mvc 0(2,%r2),6(%r5) # store devno
771 tm 4(%r5),0x80 # qdio capable device?
772 bno 0(%r14)
773 oi 3(%r6),0x02 # set flag
774
775 # copy ipl parameters
776
777 lhi %r0,4096
778 l %r2,20(%r0) # get address of parameter list
779 lhi %r3,IPL_PARMBLOCK_ORIGIN
780 st %r3,20(%r0)
781 lhi %r4,1
782 cr %r2,%r3 # start parameters < destination ?
783 jl 0f
784 lhi %r1,1 # copy direction is upwards
785 j 1f
7860: lhi %r1,-1 # copy direction is downwards
787 ar %r2,%r0
788 ar %r3,%r0
789 ar %r2,%r1
790 ar %r3,%r1
7911: mvc 0(1,%r3),0(%r2) # finally copy ipl parameters
792 ar %r3,%r1
793 ar %r2,%r1
794 sr %r0,%r4
795 jne 1b
796 b 0(%r14)
797
798 .align 4
799.Lipl_schib:
800 .rept 13
801 .long 0
802 .endr
803
804 .globl ipl_parameter_flags
805ipl_parameter_flags:
806 .long 0
807 .globl ipl_devno
808ipl_devno:
809 .word 0
810 289
811#ifdef CONFIG_SHARED_KERNEL 290#ifdef CONFIG_SHARED_KERNEL
812 .org 0x100000 291 .org 0x100000
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