1/*
2 * Copyright IBM Corp. 1999,2010
3 *
4 *    Author(s): Hartmut Penner <hp@de.ibm.com>
5 *		 Martin Schwidefsky <schwidefsky@de.ibm.com>
6 *		 Rob van der Heij <rvdhei@iae.nl>
7 *		 Heiko Carstens <heiko.carstens@de.ibm.com>
8 *
9 * There are 5 different IPL methods
10 *  1) load the image directly into ram at address 0 and do an PSW restart
11 *  2) linload will load the image from address 0x10000 to memory 0x10000
12 *     and start the code thru LPSW 0x0008000080010000 (VM only, deprecated)
13 *  3) generate the tape ipl header, store the generated image on a tape
14 *     and ipl from it
15 *     In case of SL tape you need to IPL 5 times to get past VOL1 etc
16 *  4) generate the vm reader ipl header, move the generated image to the
17 *     VM reader (use option NOH!) and do a ipl from reader (VM only)
18 *  5) direct call of start by the SALIPL loader
19 *  We use the cpuid to distinguish between VM and native ipl
20 *  params for kernel are pushed to 0x10400 (see setup.h)
21 *
22 */
23
24#include <linux/init.h>
25#include <linux/linkage.h>
26#include <asm/asm-offsets.h>
27#include <asm/thread_info.h>
28#include <asm/page.h>
29
30#ifdef CONFIG_64BIT
31#define ARCH_OFFSET	4
32#else
33#define ARCH_OFFSET	0
34#endif
35
36__HEAD
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# Parameters:
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	l	%r12,.Lparm		# pointer to parameter area
268	st	%r1,IPL_DEVICE+ARCH_OFFSET-PARMAREA(%r12) # save ipl device number
269
270#
271# load parameter file from ipl device
272#
273.Lagain1:
274	l	%r2,.Linitrd		# ramdisk loc. is 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,.Linitrd
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	la	%r3,COMMAND_LINE-PARMAREA(%r12) # load adr. of command line
290	mvc	0(256,%r3),0(%r4)
291	mvc	256(256,%r3),256(%r4)
292	mvc	512(256,%r3),512(%r4)
293	mvc	768(122,%r3),768(%r4)
294	slr	%r0,%r0
295	b	.Lcntlp
296.Ldelspc:
297	ic	%r0,0(%r2,%r3)
298	chi	%r0,0x20		# is it a space ?
299	be	.Lcntlp
300	ahi	%r2,1
301	b	.Leolp
302.Lcntlp:
303	brct	%r2,.Ldelspc
304.Leolp:
305	slr	%r0,%r0
306	stc	%r0,0(%r2,%r3)		# terminate buffer
307.Lnopf:
308
309#
310# load ramdisk from ipl device
311#
312.Lagain2:
313	l	%r2,.Linitrd		# addr of ramdisk
314	st	%r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12)
315	bas	%r14,.Lloader		# load ramdisk
316	st	%r2,INITRD_SIZE+ARCH_OFFSET-PARMAREA(%r12) # store size of rd
317	ltr	%r2,%r2
318	bnz	.Lrdcont
319	st	%r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) # no ramdisk found
320.Lrdcont:
321	l	%r2,.Linitrd
322
323	clc	0(3,%r2),.L_hdr		# skip HDRx and EOFx
324	bz	.Lagain2
325	clc	0(3,%r2),.L_eof
326	bz	.Lagain2
327
328#ifdef CONFIG_IPL_VM
329#
330# reset files in VM reader
331#
332	stidp	__LC_SAVE_AREA_SYNC	# store cpuid
333	tm	__LC_SAVE_AREA_SYNC,0xff# running VM ?
334	bno	.Lnoreset
335	la	%r2,.Lreset
336	lhi	%r3,26
337	diag	%r2,%r3,8
338	la	%r5,.Lirb
339	stsch	0(%r5)			# check if irq is pending
340	tm	30(%r5),0x0f		# by verifying if any of the
341	bnz	.Lwaitforirq		# activity or status control
342	tm	31(%r5),0xff		# bits is set in the schib
343	bz	.Lnoreset
344.Lwaitforirq:
345	mvc	0x78(8),.Lrdrnewpsw	# set up IO interrupt psw
346.Lwaitrdrirq:
347	lpsw	.Lrdrwaitpsw
348.Lrdrint:
349	c	%r1,0xb8		# compare subchannel number
350	bne	.Lwaitrdrirq
351	la	%r5,.Lirb
352	tsch	0(%r5)
353.Lnoreset:
354	b	.Lnoload
355
356	.align	8
357.Lrdrnewpsw:
358	.long	0x00080000,0x80000000+.Lrdrint
359.Lrdrwaitpsw:
360	.long	0x020a0000,0x80000000+.Lrdrint
361#endif
362
363#
364# everything loaded, go for it
365#
366.Lnoload:
367	l	%r1,.Lstartup
368	br	%r1
369
370.Linitrd:.long _end			# default address of initrd
371.Lparm:	.long  PARMAREA
372.Lstartup: .long startup
373.Lreset:.byte	0xc3,0xc8,0xc1,0xd5,0xc7,0xc5,0x40,0xd9,0xc4,0xd9,0x40
374	.byte	0xc1,0xd3,0xd3,0x40,0xd2,0xc5,0xc5,0xd7,0x40,0xd5,0xd6
375	.byte	0xc8,0xd6,0xd3,0xc4	# "change rdr all keep nohold"
376.L_eof: .long	0xc5d6c600	 /* C'EOF' */
377.L_hdr: .long	0xc8c4d900	 /* C'HDR' */
378
379#endif	/* CONFIG_IPL */
380
381#
382# SALIPL loader support. Based on a patch by Rob van der Heij.
383# This entry point is called directly from the SALIPL loader and
384# doesn't need a builtin ipl record.
385#
386	.org	0x800
387ENTRY(start)
388	stm	%r0,%r15,0x07b0		# store registers
389	basr	%r12,%r0
390.base:
391	l	%r11,.parm
392	l	%r8,.cmd		# pointer to command buffer
393
394	ltr	%r9,%r9			# do we have SALIPL parameters?
395	bp	.sk8x8
396
397	mvc	0(64,%r8),0x00b0	# copy saved registers
398	xc	64(240-64,%r8),0(%r8)	# remainder of buffer
399	tr	0(64,%r8),.lowcase
400	b	.gotr
401.sk8x8:
402	mvc	0(240,%r8),0(%r9)	# copy iplparms into buffer
403.gotr:
404	slr	%r0,%r0
405	st	%r0,INITRD_SIZE+ARCH_OFFSET-PARMAREA(%r11)
406	st	%r0,INITRD_START+ARCH_OFFSET-PARMAREA(%r11)
407	j	startup 		# continue with startup
408.cmd:	.long	COMMAND_LINE		# address of command line buffer
409.parm:	.long	PARMAREA
410.lowcase:
411	.byte 0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07
412	.byte 0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f
413	.byte 0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17
414	.byte 0x18,0x19,0x1a,0x1b,0x1c,0x1d,0x1e,0x1f
415	.byte 0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27
416	.byte 0x28,0x29,0x2a,0x2b,0x2c,0x2d,0x2e,0x2f
417	.byte 0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37
418	.byte 0x38,0x39,0x3a,0x3b,0x3c,0x3d,0x3e,0x3f
419	.byte 0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47
420	.byte 0x48,0x49,0x4a,0x4b,0x4c,0x4d,0x4e,0x4f
421	.byte 0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57
422	.byte 0x58,0x59,0x5a,0x5b,0x5c,0x5d,0x5e,0x5f
423	.byte 0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67
424	.byte 0x68,0x69,0x6a,0x6b,0x6c,0x6d,0x6e,0x6f
425	.byte 0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77
426	.byte 0x78,0x79,0x7a,0x7b,0x7c,0x7d,0x7e,0x7f
427
428	.byte 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87
429	.byte 0x88,0x89,0x8a,0x8b,0x8c,0x8d,0x8e,0x8f
430	.byte 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97
431	.byte 0x98,0x99,0x9a,0x9b,0x9c,0x9d,0x9e,0x9f
432	.byte 0xa0,0xa1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7
433	.byte 0xa8,0xa9,0xaa,0xab,0xac,0xad,0xae,0xaf
434	.byte 0xb0,0xb1,0xb2,0xb3,0xb4,0xb5,0xb6,0xb7
435	.byte 0xb8,0xb9,0xba,0xbb,0xbc,0xbd,0xbe,0xbf
436	.byte 0xc0,0x81,0x82,0x83,0x84,0x85,0x86,0x87	# .abcdefg
437	.byte 0x88,0x89,0xca,0xcb,0xcc,0xcd,0xce,0xcf	# hi
438	.byte 0xd0,0x91,0x92,0x93,0x94,0x95,0x96,0x97	# .jklmnop
439	.byte 0x98,0x99,0xda,0xdb,0xdc,0xdd,0xde,0xdf	# qr
440	.byte 0xe0,0xe1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7	# ..stuvwx
441	.byte 0xa8,0xa9,0xea,0xeb,0xec,0xed,0xee,0xef	# yz
442	.byte 0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7
443	.byte 0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfe,0xff
444
445#
446# startup-code at 0x10000, running in absolute addressing mode
447# this is called either by the ipl loader or directly by PSW restart
448# or linload or SALIPL
449#
450	.org	0x10000
451ENTRY(startup)
452	j	.Lep_startup_normal
453	.org	0x10008
454#
455# This is a list of s390 kernel entry points. At address 0x1000f the number of
456# valid entry points is stored.
457#
458# IMPORTANT: Do not change this table, it is s390 kernel ABI!
459#
460	.ascii	"S390EP"
461	.byte	0x00,0x01
462#
463# kdump startup-code at 0x10010, running in 64 bit absolute addressing mode
464#
465	.org	0x10010
466ENTRY(startup_kdump)
467	j	.Lep_startup_kdump
468.Lep_startup_normal:
469	basr	%r13,0			# get base
470.LPG0:
471	xc	0x200(256),0x200	# partially clear lowcore
472	xc	0x300(256),0x300
473	xc	0xe00(256),0xe00
474	stck	__LC_LAST_UPDATE_CLOCK
475	spt	5f-.LPG0(%r13)
476	mvc	__LC_LAST_UPDATE_TIMER(8),5f-.LPG0(%r13)
477	xc	__LC_STFL_FAC_LIST(8),__LC_STFL_FAC_LIST
478#ifndef CONFIG_MARCH_G5
479	# check capabilities against MARCH_{G5,Z900,Z990,Z9_109,Z10}
480	.insn	s,0xb2b10000,__LC_STFL_FAC_LIST	# store facility list
481	tm	__LC_STFL_FAC_LIST,0x01	# stfle available ?
482	jz	0f
483	la	%r0,0
484	.insn	s,0xb2b00000,__LC_STFL_FAC_LIST	# store facility list extended
4850:	l	%r0,__LC_STFL_FAC_LIST
486	n	%r0,2f+8-.LPG0(%r13)
487	cl	%r0,2f+8-.LPG0(%r13)
488	jne	1f
489	l	%r0,__LC_STFL_FAC_LIST+4
490	n	%r0,2f+12-.LPG0(%r13)
491	cl	%r0,2f+12-.LPG0(%r13)
492	je	3f
4931:	l	%r15,.Lstack-.LPG0(%r13)
494	ahi	%r15,-96
495	la	%r2,.Lals_string-.LPG0(%r13)
496	l	%r3,.Lsclp_print-.LPG0(%r13)
497	basr	%r14,%r3
498	lpsw	2f-.LPG0(%r13)		# machine type not good enough, crash
499.Lals_string:
500	.asciz	"The Linux kernel requires more recent processor hardware"
501.Lsclp_print:
502	.long	_sclp_print_early
503.Lstack:
504	.long	0x8000 + (1<<(PAGE_SHIFT+THREAD_ORDER))
505	.align 16
5062:	.long	0x000a0000,0x8badcccc
507#if defined(CONFIG_64BIT)
508#if defined(CONFIG_MARCH_Z196)
509	.long 0xc100efe3, 0xf46c0000
510#elif defined(CONFIG_MARCH_Z10)
511	.long 0xc100efe3, 0xf0680000
512#elif defined(CONFIG_MARCH_Z9_109)
513	.long 0xc100efc3, 0x00000000
514#elif defined(CONFIG_MARCH_Z990)
515	.long 0xc0002000, 0x00000000
516#elif defined(CONFIG_MARCH_Z900)
517	.long 0xc0000000, 0x00000000
518#endif
519#else
520#if defined(CONFIG_MARCH_Z196)
521	.long 0x8100c880, 0x00000000
522#elif defined(CONFIG_MARCH_Z10)
523	.long 0x8100c880, 0x00000000
524#elif defined(CONFIG_MARCH_Z9_109)
525	.long 0x8100c880, 0x00000000
526#elif defined(CONFIG_MARCH_Z990)
527	.long 0x80002000, 0x00000000
528#elif defined(CONFIG_MARCH_Z900)
529	.long 0x80000000, 0x00000000
530#endif
531#endif
5323:
533#endif
534
535#ifdef CONFIG_64BIT
536	mvi	__LC_AR_MODE_ID,1	# set esame flag
537	slr	%r0,%r0 		# set cpuid to zero
538	lhi	%r1,2			# mode 2 = esame (dump)
539	sigp	%r1,%r0,0x12		# switch to esame mode
540	sam64				# switch to 64 bit mode
541	larl	%r13,4f
542	lmh	%r0,%r15,0(%r13)	# clear high-order half
543	jg	startup_continue
5444:	.fill	16,4,0x0
545#else
546	mvi	__LC_AR_MODE_ID,0	# set ESA flag (mode 0)
547	l	%r13,4f-.LPG0(%r13)
548	b	0(%r13)
549	.align	8
5504:	.long	startup_continue
551#endif
552	.align	8
5535:	.long	0x7fffffff,0xffffffff
554
555#include "head_kdump.S"
556
557#
558# params at 10400 (setup.h)
559#
560	.org	PARMAREA
561	.long	0,0			# IPL_DEVICE
562	.long	0,0			# INITRD_START
563	.long	0,0			# INITRD_SIZE
564	.long	0,0			# OLDMEM_BASE
565	.long	0,0			# OLDMEM_SIZE
566
567	.org	COMMAND_LINE
568	.byte	"root=/dev/ram0 ro"
569	.byte	0
570
571	.org	0x11000
572