blob: 805b6686b641dacf24afd15e4e34ee61d42cac8b [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Heiko Carstensa53c8fa2012-07-20 11:15:04 +02002 * Copyright IBM Corp. 1999, 2010
Heiko Carstens0ad775d2005-11-07 00:59:12 -08003 *
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>
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 *
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)
Heiko Carstens0ad775d2005-11-07 00:59:12 -080021 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070022 */
23
Tim Abbott2133bb82009-04-25 22:11:06 -040024#include <linux/init.h>
Jan Glauber144d6342011-07-24 10:48:19 +020025#include <linux/linkage.h>
Sam Ravnborg0013a852005-09-09 20:57:26 +020026#include <asm/asm-offsets.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include <asm/thread_info.h>
28#include <asm/page.h>
29
Martin Schwidefsky347a8dc2006-01-06 00:19:28 -080030#ifdef CONFIG_64BIT
Heiko Carstens0ad775d2005-11-07 00:59:12 -080031#define ARCH_OFFSET 4
32#else
33#define ARCH_OFFSET 0
34#endif
35
Tim Abbott2133bb82009-04-25 22:11:06 -040036__HEAD
Linus Torvalds1da177e2005-04-16 15:20:36 -070037
Heiko Carstens25d83cb2006-09-28 16:56:37 +020038#define IPL_BS 0x730
39 .org 0
40 .long 0x00080000,0x80000000+iplstart # The first 24 bytes are loaded
41 .long 0x02000018,0x60000050 # by ipl to addresses 0-23.
42 .long 0x02000068,0x60000050 # (a PSW and two CCWs).
43 .fill 80-24,1,0x40 # bytes 24-79 are discarded !!
44 .long 0x020000f0,0x60000050 # The next 160 byte are loaded
45 .long 0x02000140,0x60000050 # to addresses 0x18-0xb7
46 .long 0x02000190,0x60000050 # They form the continuation
47 .long 0x020001e0,0x60000050 # of the CCW program started
48 .long 0x02000230,0x60000050 # by ipl and load the range
49 .long 0x02000280,0x60000050 # 0x0f0-0x730 from the image
50 .long 0x020002d0,0x60000050 # to the range 0x0f0-0x730
51 .long 0x02000320,0x60000050 # in memory. At the end of
52 .long 0x02000370,0x60000050 # the channel program the PSW
53 .long 0x020003c0,0x60000050 # at location 0 is loaded.
54 .long 0x02000410,0x60000050 # Initial processing starts
55 .long 0x02000460,0x60000050 # at 0xf0 = iplstart.
56 .long 0x020004b0,0x60000050
57 .long 0x02000500,0x60000050
58 .long 0x02000550,0x60000050
59 .long 0x020005a0,0x60000050
60 .long 0x020005f0,0x60000050
61 .long 0x02000640,0x60000050
62 .long 0x02000690,0x60000050
63 .long 0x020006e0,0x20000050
Linus Torvalds1da177e2005-04-16 15:20:36 -070064
Heiko Carstens25d83cb2006-09-28 16:56:37 +020065 .org 0xf0
Linus Torvalds1da177e2005-04-16 15:20:36 -070066#
67# subroutine for loading cards from the reader
68#
Heiko Carstens25d83cb2006-09-28 16:56:37 +020069.Lloader:
70 la %r3,.Lorb # r2 = address of orb into r2
71 la %r5,.Lirb # r4 = address of irb
72 la %r6,.Lccws
73 la %r7,20
Linus Torvalds1da177e2005-04-16 15:20:36 -070074.Linit:
Heiko Carstens25d83cb2006-09-28 16:56:37 +020075 st %r2,4(%r6) # initialize CCW data addresses
76 la %r2,0x50(%r2)
77 la %r6,8(%r6)
78 bct 7,.Linit
Linus Torvalds1da177e2005-04-16 15:20:36 -070079
Heiko Carstens25d83cb2006-09-28 16:56:37 +020080 lctl %c6,%c6,.Lcr6 # set IO subclass mask
81 slr %r2,%r2
Linus Torvalds1da177e2005-04-16 15:20:36 -070082.Lldlp:
Heiko Carstens25d83cb2006-09-28 16:56:37 +020083 ssch 0(%r3) # load chunk of 1600 bytes
84 bnz .Llderr
Linus Torvalds1da177e2005-04-16 15:20:36 -070085.Lwait4irq:
Heiko Carstens25d83cb2006-09-28 16:56:37 +020086 mvc 0x78(8),.Lnewpsw # set up IO interrupt psw
87 lpsw .Lwaitpsw
Linus Torvalds1da177e2005-04-16 15:20:36 -070088.Lioint:
Heiko Carstens25d83cb2006-09-28 16:56:37 +020089 c %r1,0xb8 # compare subchannel number
90 bne .Lwait4irq
91 tsch 0(%r5)
Linus Torvalds1da177e2005-04-16 15:20:36 -070092
Heiko Carstens25d83cb2006-09-28 16:56:37 +020093 slr %r0,%r0
94 ic %r0,8(%r5) # get device status
95 chi %r0,8 # channel end ?
96 be .Lcont
97 chi %r0,12 # channel end + device end ?
98 be .Lcont
Linus Torvalds1da177e2005-04-16 15:20:36 -070099
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200100 l %r0,4(%r5)
101 s %r0,8(%r3) # r0/8 = number of ccws executed
102 mhi %r0,10 # *10 = number of bytes in ccws
103 lh %r3,10(%r5) # get residual count
104 sr %r0,%r3 # #ccws*80-residual=#bytes read
105 ar %r2,%r0
106
107 br %r14 # r2 contains the total size
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108
109.Lcont:
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200110 ahi %r2,0x640 # add 0x640 to total size
111 la %r6,.Lccws
112 la %r7,20
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113.Lincr:
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200114 l %r0,4(%r6) # update CCW data addresses
115 ahi %r0,0x640
116 st %r0,4(%r6)
117 ahi %r6,8
118 bct 7,.Lincr
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200120 b .Lldlp
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121.Llderr:
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200122 lpsw .Lcrash
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200124 .align 8
125.Lorb: .long 0x00000000,0x0080ff00,.Lccws
126.Lirb: .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
127.Lcr6: .long 0xff000000
128.Lloadp:.long 0,0
129 .align 8
130.Lcrash:.long 0x000a0000,0x00000000
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131.Lnewpsw:
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200132 .long 0x00080000,0x80000000+.Lioint
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133.Lwaitpsw:
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200134 .long 0x020a0000,0x80000000+.Lioint
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200136 .align 8
137.Lccws: .rept 19
138 .long 0x02600050,0x00000000
139 .endr
140 .long 0x02200050,0x00000000
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141
142iplstart:
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200143 lh %r1,0xb8 # test if subchannel number
144 bct %r1,.Lnoload # is valid
145 l %r1,0xb8 # load ipl subchannel number
146 la %r2,IPL_BS # load start address
147 bas %r14,.Lloader # load rest of ipl image
148 l %r12,.Lparm # pointer to parameter area
149 st %r1,IPL_DEVICE+ARCH_OFFSET-PARMAREA(%r12) # save ipl device number
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150
151#
152# load parameter file from ipl device
153#
154.Lagain1:
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200155 l %r2,.Linitrd # ramdisk loc. is temp
156 bas %r14,.Lloader # load parameter file
157 ltr %r2,%r2 # got anything ?
158 bz .Lnopf
159 chi %r2,895
160 bnh .Lnotrunc
161 la %r2,895
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162.Lnotrunc:
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200163 l %r4,.Linitrd
164 clc 0(3,%r4),.L_hdr # if it is HDRx
165 bz .Lagain1 # skip dataset header
166 clc 0(3,%r4),.L_eof # if it is EOFx
167 bz .Lagain1 # skip dateset trailer
168 la %r5,0(%r4,%r2)
169 lr %r3,%r2
Martin Schwidefsky61fd3302010-02-26 22:37:51 +0100170 la %r3,COMMAND_LINE-PARMAREA(%r12) # load adr. of command line
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200171 mvc 0(256,%r3),0(%r4)
172 mvc 256(256,%r3),256(%r4)
173 mvc 512(256,%r3),512(%r4)
174 mvc 768(122,%r3),768(%r4)
175 slr %r0,%r0
176 b .Lcntlp
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177.Ldelspc:
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200178 ic %r0,0(%r2,%r3)
179 chi %r0,0x20 # is it a space ?
180 be .Lcntlp
181 ahi %r2,1
182 b .Leolp
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183.Lcntlp:
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200184 brct %r2,.Ldelspc
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185.Leolp:
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200186 slr %r0,%r0
187 stc %r0,0(%r2,%r3) # terminate buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188.Lnopf:
189
190#
191# load ramdisk from ipl device
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200192#
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193.Lagain2:
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200194 l %r2,.Linitrd # addr of ramdisk
195 st %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12)
196 bas %r14,.Lloader # load ramdisk
197 st %r2,INITRD_SIZE+ARCH_OFFSET-PARMAREA(%r12) # store size of rd
198 ltr %r2,%r2
199 bnz .Lrdcont
200 st %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) # no ramdisk found
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201.Lrdcont:
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200202 l %r2,.Linitrd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200204 clc 0(3,%r2),.L_hdr # skip HDRx and EOFx
205 bz .Lagain2
206 clc 0(3,%r2),.L_eof
207 bz .Lagain2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209#
210# reset files in VM reader
211#
Martin Schwidefskyc5328902011-12-27 11:27:15 +0100212 stidp __LC_SAVE_AREA_SYNC # store cpuid
213 tm __LC_SAVE_AREA_SYNC,0xff# running VM ?
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200214 bno .Lnoreset
215 la %r2,.Lreset
216 lhi %r3,26
217 diag %r2,%r3,8
218 la %r5,.Lirb
219 stsch 0(%r5) # check if irq is pending
220 tm 30(%r5),0x0f # by verifying if any of the
221 bnz .Lwaitforirq # activity or status control
222 tm 31(%r5),0xff # bits is set in the schib
223 bz .Lnoreset
Heiko Carstens350e3ad2005-07-29 14:03:36 -0700224.Lwaitforirq:
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200225 mvc 0x78(8),.Lrdrnewpsw # set up IO interrupt psw
Heiko Carstens2b071882005-06-21 17:16:31 -0700226.Lwaitrdrirq:
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200227 lpsw .Lrdrwaitpsw
Heiko Carstens2b071882005-06-21 17:16:31 -0700228.Lrdrint:
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200229 c %r1,0xb8 # compare subchannel number
230 bne .Lwaitrdrirq
231 la %r5,.Lirb
232 tsch 0(%r5)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233.Lnoreset:
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200234 b .Lnoload
Heiko Carstens2b071882005-06-21 17:16:31 -0700235
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200236 .align 8
Heiko Carstens2b071882005-06-21 17:16:31 -0700237.Lrdrnewpsw:
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200238 .long 0x00080000,0x80000000+.Lrdrint
Heiko Carstens2b071882005-06-21 17:16:31 -0700239.Lrdrwaitpsw:
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200240 .long 0x020a0000,0x80000000+.Lrdrint
Heiko Carstens2b071882005-06-21 17:16:31 -0700241
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242#
243# everything loaded, go for it
244#
245.Lnoload:
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200246 l %r1,.Lstartup
247 br %r1
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248
Heiko Carstense033b9a2010-08-09 18:12:57 +0200249.Linitrd:.long _end # default address of initrd
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250.Lparm: .long PARMAREA
251.Lstartup: .long startup
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200252.Lreset:.byte 0xc3,0xc8,0xc1,0xd5,0xc7,0xc5,0x40,0xd9,0xc4,0xd9,0x40
253 .byte 0xc1,0xd3,0xd3,0x40,0xd2,0xc5,0xc5,0xd7,0x40,0xd5,0xd6
254 .byte 0xc8,0xd6,0xd3,0xc4 # "change rdr all keep nohold"
255.L_eof: .long 0xc5d6c600 /* C'EOF' */
256.L_hdr: .long 0xc8c4d900 /* C'HDR' */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258#
259# SALIPL loader support. Based on a patch by Rob van der Heij.
260# This entry point is called directly from the SALIPL loader and
261# doesn't need a builtin ipl record.
262#
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200263 .org 0x800
Jan Glauber144d6342011-07-24 10:48:19 +0200264ENTRY(start)
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200265 stm %r0,%r15,0x07b0 # store registers
266 basr %r12,%r0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267.base:
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200268 l %r11,.parm
269 l %r8,.cmd # pointer to command buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200271 ltr %r9,%r9 # do we have SALIPL parameters?
272 bp .sk8x8
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200274 mvc 0(64,%r8),0x00b0 # copy saved registers
275 xc 64(240-64,%r8),0(%r8) # remainder of buffer
276 tr 0(64,%r8),.lowcase
277 b .gotr
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278.sk8x8:
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200279 mvc 0(240,%r8),0(%r9) # copy iplparms into buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280.gotr:
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200281 slr %r0,%r0
282 st %r0,INITRD_SIZE+ARCH_OFFSET-PARMAREA(%r11)
283 st %r0,INITRD_START+ARCH_OFFSET-PARMAREA(%r11)
284 j startup # continue with startup
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200285.cmd: .long COMMAND_LINE # address of command line buffer
286.parm: .long PARMAREA
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287.lowcase:
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200288 .byte 0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 .byte 0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200290 .byte 0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 .byte 0x18,0x19,0x1a,0x1b,0x1c,0x1d,0x1e,0x1f
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200292 .byte 0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 .byte 0x28,0x29,0x2a,0x2b,0x2c,0x2d,0x2e,0x2f
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200294 .byte 0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 .byte 0x38,0x39,0x3a,0x3b,0x3c,0x3d,0x3e,0x3f
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200296 .byte 0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 .byte 0x48,0x49,0x4a,0x4b,0x4c,0x4d,0x4e,0x4f
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200298 .byte 0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 .byte 0x58,0x59,0x5a,0x5b,0x5c,0x5d,0x5e,0x5f
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200300 .byte 0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 .byte 0x68,0x69,0x6a,0x6b,0x6c,0x6d,0x6e,0x6f
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200302 .byte 0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 .byte 0x78,0x79,0x7a,0x7b,0x7c,0x7d,0x7e,0x7f
304
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200305 .byte 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 .byte 0x88,0x89,0x8a,0x8b,0x8c,0x8d,0x8e,0x8f
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200307 .byte 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 .byte 0x98,0x99,0x9a,0x9b,0x9c,0x9d,0x9e,0x9f
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200309 .byte 0xa0,0xa1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 .byte 0xa8,0xa9,0xaa,0xab,0xac,0xad,0xae,0xaf
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200311 .byte 0xb0,0xb1,0xb2,0xb3,0xb4,0xb5,0xb6,0xb7
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 .byte 0xb8,0xb9,0xba,0xbb,0xbc,0xbd,0xbe,0xbf
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200313 .byte 0xc0,0x81,0x82,0x83,0x84,0x85,0x86,0x87 # .abcdefg
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 .byte 0x88,0x89,0xca,0xcb,0xcc,0xcd,0xce,0xcf # hi
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200315 .byte 0xd0,0x91,0x92,0x93,0x94,0x95,0x96,0x97 # .jklmnop
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316 .byte 0x98,0x99,0xda,0xdb,0xdc,0xdd,0xde,0xdf # qr
317 .byte 0xe0,0xe1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7 # ..stuvwx
318 .byte 0xa8,0xa9,0xea,0xeb,0xec,0xed,0xee,0xef # yz
Heiko Carstens25d83cb2006-09-28 16:56:37 +0200319 .byte 0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 .byte 0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfe,0xff
321
Martin Schwidefskye37f50e2008-12-25 13:39:19 +0100322#
323# startup-code at 0x10000, running in absolute addressing mode
324# this is called either by the ipl loader or directly by PSW restart
325# or linload or SALIPL
326#
327 .org 0x10000
Jan Glauber144d6342011-07-24 10:48:19 +0200328ENTRY(startup)
Michael Holzheu60a0c682011-10-30 15:16:40 +0100329 j .Lep_startup_normal
330 .org 0x10008
331#
332# This is a list of s390 kernel entry points. At address 0x1000f the number of
333# valid entry points is stored.
334#
335# IMPORTANT: Do not change this table, it is s390 kernel ABI!
336#
337 .ascii "S390EP"
338 .byte 0x00,0x01
339#
340# kdump startup-code at 0x10010, running in 64 bit absolute addressing mode
341#
342 .org 0x10010
343ENTRY(startup_kdump)
344 j .Lep_startup_kdump
345.Lep_startup_normal:
Martin Schwidefsky1844c9b2010-02-26 22:37:53 +0100346 basr %r13,0 # get base
Martin Schwidefskye37f50e2008-12-25 13:39:19 +0100347.LPG0:
Martin Schwidefsky866ba282009-03-26 15:24:44 +0100348 xc 0x200(256),0x200 # partially clear lowcore
349 xc 0x300(256),0x300
Michael Holzheu60a0c682011-10-30 15:16:40 +0100350 xc 0xe00(256),0xe00
Martin Schwidefsky1844c9b2010-02-26 22:37:53 +0100351 stck __LC_LAST_UPDATE_CLOCK
352 spt 5f-.LPG0(%r13)
353 mvc __LC_LAST_UPDATE_TIMER(8),5f-.LPG0(%r13)
Michael Holzheu37e37c22012-04-11 14:28:11 +0200354 xc __LC_STFL_FAC_LIST(8),__LC_STFL_FAC_LIST
Martin Schwidefskye37f50e2008-12-25 13:39:19 +0100355#ifndef CONFIG_MARCH_G5
Martin Schwidefsky8c4caa42009-06-12 10:26:23 +0200356 # check capabilities against MARCH_{G5,Z900,Z990,Z9_109,Z10}
Martin Schwidefsky88381012011-04-04 09:43:33 +0200357 .insn s,0xb2b10000,__LC_STFL_FAC_LIST # store facility list
Martin Schwidefsky8c4caa42009-06-12 10:26:23 +0200358 tm __LC_STFL_FAC_LIST,0x01 # stfle available ?
359 jz 0f
360 la %r0,0
361 .insn s,0xb2b00000,__LC_STFL_FAC_LIST # store facility list extended
3620: l %r0,__LC_STFL_FAC_LIST
363 n %r0,2f+8-.LPG0(%r13)
364 cl %r0,2f+8-.LPG0(%r13)
365 jne 1f
366 l %r0,__LC_STFL_FAC_LIST+4
367 n %r0,2f+12-.LPG0(%r13)
368 cl %r0,2f+12-.LPG0(%r13)
369 je 3f
Heiko Carstensd90cbd42009-06-12 10:26:24 +02003701: l %r15,.Lstack-.LPG0(%r13)
Heiko Carstensd90cbd42009-06-12 10:26:24 +0200371 ahi %r15,-96
372 la %r2,.Lals_string-.LPG0(%r13)
373 l %r3,.Lsclp_print-.LPG0(%r13)
374 basr %r14,%r3
375 lpsw 2f-.LPG0(%r13) # machine type not good enough, crash
376.Lals_string:
377 .asciz "The Linux kernel requires more recent processor hardware"
378.Lsclp_print:
379 .long _sclp_print_early
380.Lstack:
Martin Schwidefsky1844c9b2010-02-26 22:37:53 +0100381 .long 0x8000 + (1<<(PAGE_SHIFT+THREAD_ORDER))
Martin Schwidefskye37f50e2008-12-25 13:39:19 +0100382 .align 16
Martin Schwidefsky8c4caa42009-06-12 10:26:23 +02003832: .long 0x000a0000,0x8badcccc
384#if defined(CONFIG_64BIT)
Heiko Carstensf861e402010-10-25 16:10:17 +0200385#if defined(CONFIG_MARCH_Z196)
386 .long 0xc100efe3, 0xf46c0000
387#elif defined(CONFIG_MARCH_Z10)
Martin Schwidefsky8c4caa42009-06-12 10:26:23 +0200388 .long 0xc100efe3, 0xf0680000
Martin Schwidefskye37f50e2008-12-25 13:39:19 +0100389#elif defined(CONFIG_MARCH_Z9_109)
Martin Schwidefsky8c4caa42009-06-12 10:26:23 +0200390 .long 0xc100efc3, 0x00000000
Martin Schwidefskye37f50e2008-12-25 13:39:19 +0100391#elif defined(CONFIG_MARCH_Z990)
Martin Schwidefsky8c4caa42009-06-12 10:26:23 +0200392 .long 0xc0002000, 0x00000000
Martin Schwidefskye37f50e2008-12-25 13:39:19 +0100393#elif defined(CONFIG_MARCH_Z900)
Martin Schwidefsky8c4caa42009-06-12 10:26:23 +0200394 .long 0xc0000000, 0x00000000
Martin Schwidefskye37f50e2008-12-25 13:39:19 +0100395#endif
Martin Schwidefsky8c4caa42009-06-12 10:26:23 +0200396#else
Heiko Carstensf861e402010-10-25 16:10:17 +0200397#if defined(CONFIG_MARCH_Z196)
398 .long 0x8100c880, 0x00000000
399#elif defined(CONFIG_MARCH_Z10)
Martin Schwidefsky8c4caa42009-06-12 10:26:23 +0200400 .long 0x8100c880, 0x00000000
401#elif defined(CONFIG_MARCH_Z9_109)
402 .long 0x8100c880, 0x00000000
403#elif defined(CONFIG_MARCH_Z990)
404 .long 0x80002000, 0x00000000
405#elif defined(CONFIG_MARCH_Z900)
406 .long 0x80000000, 0x00000000
407#endif
408#endif
4093:
Martin Schwidefskye37f50e2008-12-25 13:39:19 +0100410#endif
411
Martin Schwidefsky1844c9b2010-02-26 22:37:53 +0100412#ifdef CONFIG_64BIT
413 mvi __LC_AR_MODE_ID,1 # set esame flag
414 slr %r0,%r0 # set cpuid to zero
415 lhi %r1,2 # mode 2 = esame (dump)
416 sigp %r1,%r0,0x12 # switch to esame mode
417 sam64 # switch to 64 bit mode
Martin Schwidefsky06c0dd72010-03-24 11:49:57 +0100418 larl %r13,4f
419 lmh %r0,%r15,0(%r13) # clear high-order half
Martin Schwidefsky1844c9b2010-02-26 22:37:53 +0100420 jg startup_continue
Martin Schwidefsky06c0dd72010-03-24 11:49:57 +01004214: .fill 16,4,0x0
Martin Schwidefsky1844c9b2010-02-26 22:37:53 +0100422#else
423 mvi __LC_AR_MODE_ID,0 # set ESA flag (mode 0)
Martin Schwidefskyb6112cc2009-04-14 15:36:28 +0200424 l %r13,4f-.LPG0(%r13)
Martin Schwidefskye37f50e2008-12-25 13:39:19 +0100425 b 0(%r13)
Martin Schwidefskyab96e792009-04-14 15:36:29 +0200426 .align 8
Martin Schwidefsky1844c9b2010-02-26 22:37:53 +01004274: .long startup_continue
428#endif
429 .align 8
4305: .long 0x7fffffff,0xffffffff
Martin Schwidefskye37f50e2008-12-25 13:39:19 +0100431
Michael Holzheu60a0c682011-10-30 15:16:40 +0100432#include "head_kdump.S"
433
Martin Schwidefskye37f50e2008-12-25 13:39:19 +0100434#
435# params at 10400 (setup.h)
436#
437 .org PARMAREA
438 .long 0,0 # IPL_DEVICE
439 .long 0,0 # INITRD_START
440 .long 0,0 # INITRD_SIZE
Michael Holzheu60a0c682011-10-30 15:16:40 +0100441 .long 0,0 # OLDMEM_BASE
442 .long 0,0 # OLDMEM_SIZE
Martin Schwidefskye37f50e2008-12-25 13:39:19 +0100443
444 .org COMMAND_LINE
445 .byte "root=/dev/ram0 ro"
446 .byte 0
447
Martin Schwidefsky1844c9b2010-02-26 22:37:53 +0100448 .org 0x11000