Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1844c9bc | 2 | * Copyright IBM Corp. 1999,2010 |
0ad775db HC |
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> | |
1da177e4 LT |
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) | |
0ad775db | 21 | * |
1da177e4 LT |
22 | */ |
23 | ||
2133bb8d | 24 | #include <linux/init.h> |
0013a854 | 25 | #include <asm/asm-offsets.h> |
1da177e4 LT |
26 | #include <asm/thread_info.h> |
27 | #include <asm/page.h> | |
28 | ||
347a8dc3 | 29 | #ifdef CONFIG_64BIT |
0ad775db HC |
30 | #define ARCH_OFFSET 4 |
31 | #else | |
32 | #define ARCH_OFFSET 0 | |
33 | #endif | |
34 | ||
2133bb8d | 35 | __HEAD |
1da177e4 | 36 | #ifndef CONFIG_IPL |
25d83cbf HC |
37 | .org 0 |
38 | .long 0x00080000,0x80000000+startup # Just a restart PSW | |
1da177e4 LT |
39 | #else |
40 | #ifdef CONFIG_IPL_TAPE | |
41 | #define IPL_BS 1024 | |
25d83cbf HC |
42 | .org 0 |
43 | .long 0x00080000,0x80000000+iplstart # The first 24 bytes are loaded | |
44 | .long 0x27000000,0x60000001 # by ipl to addresses 0-23. | |
45 | .long 0x02000000,0x20000000+IPL_BS # (a PSW and two CCWs). | |
46 | .long 0x00000000,0x00000000 # external old psw | |
47 | .long 0x00000000,0x00000000 # svc old psw | |
48 | .long 0x00000000,0x00000000 # program check old psw | |
49 | .long 0x00000000,0x00000000 # machine check old psw | |
50 | .long 0x00000000,0x00000000 # io old psw | |
51 | .long 0x00000000,0x00000000 | |
52 | .long 0x00000000,0x00000000 | |
53 | .long 0x00000000,0x00000000 | |
54 | .long 0x000a0000,0x00000058 # external new psw | |
55 | .long 0x000a0000,0x00000060 # svc new psw | |
56 | .long 0x000a0000,0x00000068 # program check new psw | |
57 | .long 0x000a0000,0x00000070 # machine check new psw | |
58 | .long 0x00080000,0x80000000+.Lioint # io new psw | |
1da177e4 | 59 | |
25d83cbf | 60 | .org 0x100 |
1da177e4 LT |
61 | # |
62 | # subroutine for loading from tape | |
98a1708d | 63 | # Parameters: |
1da177e4 LT |
64 | # R1 = device number |
65 | # R2 = load address | |
25d83cbf HC |
66 | .Lloader: |
67 | st %r14,.Lldret | |
68 | la %r3,.Lorbread # r3 = address of orb | |
69 | la %r5,.Lirb # r5 = address of irb | |
70 | st %r2,.Lccwread+4 # initialize CCW data addresses | |
71 | lctl %c6,%c6,.Lcr6 | |
72 | slr %r2,%r2 | |
1da177e4 | 73 | .Lldlp: |
25d83cbf | 74 | la %r6,3 # 3 retries |
1da177e4 | 75 | .Lssch: |
25d83cbf HC |
76 | ssch 0(%r3) # load chunk of IPL_BS bytes |
77 | bnz .Llderr | |
1da177e4 | 78 | .Lw4end: |
25d83cbf HC |
79 | bas %r14,.Lwait4io |
80 | tm 8(%r5),0x82 # do we have a problem ? | |
81 | bnz .Lrecov | |
82 | slr %r7,%r7 | |
83 | icm %r7,3,10(%r5) # get residual count | |
84 | lcr %r7,%r7 | |
85 | la %r7,IPL_BS(%r7) # IPL_BS-residual=#bytes read | |
86 | ar %r2,%r7 # add to total size | |
87 | tm 8(%r5),0x01 # found a tape mark ? | |
88 | bnz .Ldone | |
89 | l %r0,.Lccwread+4 # update CCW data addresses | |
90 | ar %r0,%r7 | |
91 | st %r0,.Lccwread+4 | |
92 | b .Lldlp | |
1da177e4 | 93 | .Ldone: |
25d83cbf HC |
94 | l %r14,.Lldret |
95 | br %r14 # r2 contains the total size | |
1da177e4 | 96 | .Lrecov: |
25d83cbf HC |
97 | bas %r14,.Lsense # do the sensing |
98 | bct %r6,.Lssch # dec. retry count & branch | |
99 | b .Llderr | |
1da177e4 LT |
100 | # |
101 | # Sense subroutine | |
102 | # | |
103 | .Lsense: | |
25d83cbf HC |
104 | st %r14,.Lsnsret |
105 | la %r7,.Lorbsense | |
106 | ssch 0(%r7) # start sense command | |
107 | bnz .Llderr | |
108 | bas %r14,.Lwait4io | |
109 | l %r14,.Lsnsret | |
110 | tm 8(%r5),0x82 # do we have a problem ? | |
111 | bnz .Llderr | |
112 | br %r14 | |
1da177e4 LT |
113 | # |
114 | # Wait for interrupt subroutine | |
115 | # | |
116 | .Lwait4io: | |
25d83cbf | 117 | lpsw .Lwaitpsw |
1da177e4 | 118 | .Lioint: |
25d83cbf HC |
119 | c %r1,0xb8 # compare subchannel number |
120 | bne .Lwait4io | |
121 | tsch 0(%r5) | |
122 | slr %r0,%r0 | |
123 | tm 8(%r5),0x82 # do we have a problem ? | |
124 | bnz .Lwtexit | |
125 | tm 8(%r5),0x04 # got device end ? | |
126 | bz .Lwait4io | |
1da177e4 | 127 | .Lwtexit: |
25d83cbf | 128 | br %r14 |
1da177e4 | 129 | .Llderr: |
25d83cbf | 130 | lpsw .Lcrash |
1da177e4 | 131 | |
25d83cbf | 132 | .align 8 |
1da177e4 | 133 | .Lorbread: |
25d83cbf HC |
134 | .long 0x00000000,0x0080ff00,.Lccwread |
135 | .align 8 | |
1da177e4 | 136 | .Lorbsense: |
25d83cbf HC |
137 | .long 0x00000000,0x0080ff00,.Lccwsense |
138 | .align 8 | |
1da177e4 | 139 | .Lccwread: |
25d83cbf | 140 | .long 0x02200000+IPL_BS,0x00000000 |
1da177e4 | 141 | .Lccwsense: |
25d83cbf | 142 | .long 0x04200001,0x00000000 |
1da177e4 | 143 | .Lwaitpsw: |
25d83cbf | 144 | .long 0x020a0000,0x80000000+.Lioint |
1da177e4 | 145 | |
25d83cbf HC |
146 | .Lirb: .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 |
147 | .Lcr6: .long 0xff000000 | |
148 | .align 8 | |
149 | .Lcrash:.long 0x000a0000,0x00000000 | |
150 | .Lldret:.long 0 | |
1da177e4 | 151 | .Lsnsret: .long 0 |
25d83cbf | 152 | #endif /* CONFIG_IPL_TAPE */ |
1da177e4 LT |
153 | |
154 | #ifdef CONFIG_IPL_VM | |
25d83cbf HC |
155 | #define IPL_BS 0x730 |
156 | .org 0 | |
157 | .long 0x00080000,0x80000000+iplstart # The first 24 bytes are loaded | |
158 | .long 0x02000018,0x60000050 # by ipl to addresses 0-23. | |
159 | .long 0x02000068,0x60000050 # (a PSW and two CCWs). | |
160 | .fill 80-24,1,0x40 # bytes 24-79 are discarded !! | |
161 | .long 0x020000f0,0x60000050 # The next 160 byte are loaded | |
162 | .long 0x02000140,0x60000050 # to addresses 0x18-0xb7 | |
163 | .long 0x02000190,0x60000050 # They form the continuation | |
164 | .long 0x020001e0,0x60000050 # of the CCW program started | |
165 | .long 0x02000230,0x60000050 # by ipl and load the range | |
166 | .long 0x02000280,0x60000050 # 0x0f0-0x730 from the image | |
167 | .long 0x020002d0,0x60000050 # to the range 0x0f0-0x730 | |
168 | .long 0x02000320,0x60000050 # in memory. At the end of | |
169 | .long 0x02000370,0x60000050 # the channel program the PSW | |
170 | .long 0x020003c0,0x60000050 # at location 0 is loaded. | |
171 | .long 0x02000410,0x60000050 # Initial processing starts | |
172 | .long 0x02000460,0x60000050 # at 0xf0 = iplstart. | |
173 | .long 0x020004b0,0x60000050 | |
174 | .long 0x02000500,0x60000050 | |
175 | .long 0x02000550,0x60000050 | |
176 | .long 0x020005a0,0x60000050 | |
177 | .long 0x020005f0,0x60000050 | |
178 | .long 0x02000640,0x60000050 | |
179 | .long 0x02000690,0x60000050 | |
180 | .long 0x020006e0,0x20000050 | |
1da177e4 | 181 | |
25d83cbf | 182 | .org 0xf0 |
1da177e4 LT |
183 | # |
184 | # subroutine for loading cards from the reader | |
185 | # | |
25d83cbf HC |
186 | .Lloader: |
187 | la %r3,.Lorb # r2 = address of orb into r2 | |
188 | la %r5,.Lirb # r4 = address of irb | |
189 | la %r6,.Lccws | |
190 | la %r7,20 | |
1da177e4 | 191 | .Linit: |
25d83cbf HC |
192 | st %r2,4(%r6) # initialize CCW data addresses |
193 | la %r2,0x50(%r2) | |
194 | la %r6,8(%r6) | |
195 | bct 7,.Linit | |
1da177e4 | 196 | |
25d83cbf HC |
197 | lctl %c6,%c6,.Lcr6 # set IO subclass mask |
198 | slr %r2,%r2 | |
1da177e4 | 199 | .Lldlp: |
25d83cbf HC |
200 | ssch 0(%r3) # load chunk of 1600 bytes |
201 | bnz .Llderr | |
1da177e4 | 202 | .Lwait4irq: |
25d83cbf HC |
203 | mvc 0x78(8),.Lnewpsw # set up IO interrupt psw |
204 | lpsw .Lwaitpsw | |
1da177e4 | 205 | .Lioint: |
25d83cbf HC |
206 | c %r1,0xb8 # compare subchannel number |
207 | bne .Lwait4irq | |
208 | tsch 0(%r5) | |
1da177e4 | 209 | |
25d83cbf HC |
210 | slr %r0,%r0 |
211 | ic %r0,8(%r5) # get device status | |
212 | chi %r0,8 # channel end ? | |
213 | be .Lcont | |
214 | chi %r0,12 # channel end + device end ? | |
215 | be .Lcont | |
1da177e4 | 216 | |
25d83cbf HC |
217 | l %r0,4(%r5) |
218 | s %r0,8(%r3) # r0/8 = number of ccws executed | |
219 | mhi %r0,10 # *10 = number of bytes in ccws | |
220 | lh %r3,10(%r5) # get residual count | |
221 | sr %r0,%r3 # #ccws*80-residual=#bytes read | |
222 | ar %r2,%r0 | |
223 | ||
224 | br %r14 # r2 contains the total size | |
1da177e4 LT |
225 | |
226 | .Lcont: | |
25d83cbf HC |
227 | ahi %r2,0x640 # add 0x640 to total size |
228 | la %r6,.Lccws | |
229 | la %r7,20 | |
1da177e4 | 230 | .Lincr: |
25d83cbf HC |
231 | l %r0,4(%r6) # update CCW data addresses |
232 | ahi %r0,0x640 | |
233 | st %r0,4(%r6) | |
234 | ahi %r6,8 | |
235 | bct 7,.Lincr | |
1da177e4 | 236 | |
25d83cbf | 237 | b .Lldlp |
1da177e4 | 238 | .Llderr: |
25d83cbf | 239 | lpsw .Lcrash |
1da177e4 | 240 | |
25d83cbf HC |
241 | .align 8 |
242 | .Lorb: .long 0x00000000,0x0080ff00,.Lccws | |
243 | .Lirb: .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 | |
244 | .Lcr6: .long 0xff000000 | |
245 | .Lloadp:.long 0,0 | |
246 | .align 8 | |
247 | .Lcrash:.long 0x000a0000,0x00000000 | |
1da177e4 | 248 | .Lnewpsw: |
25d83cbf | 249 | .long 0x00080000,0x80000000+.Lioint |
1da177e4 | 250 | .Lwaitpsw: |
25d83cbf | 251 | .long 0x020a0000,0x80000000+.Lioint |
1da177e4 | 252 | |
25d83cbf HC |
253 | .align 8 |
254 | .Lccws: .rept 19 | |
255 | .long 0x02600050,0x00000000 | |
256 | .endr | |
257 | .long 0x02200050,0x00000000 | |
258 | #endif /* CONFIG_IPL_VM */ | |
1da177e4 LT |
259 | |
260 | iplstart: | |
25d83cbf HC |
261 | lh %r1,0xb8 # test if subchannel number |
262 | bct %r1,.Lnoload # is valid | |
263 | l %r1,0xb8 # load ipl subchannel number | |
264 | la %r2,IPL_BS # load start address | |
265 | bas %r14,.Lloader # load rest of ipl image | |
266 | l %r12,.Lparm # pointer to parameter area | |
267 | st %r1,IPL_DEVICE+ARCH_OFFSET-PARMAREA(%r12) # save ipl device number | |
1da177e4 LT |
268 | |
269 | # | |
270 | # load parameter file from ipl device | |
271 | # | |
272 | .Lagain1: | |
25d83cbf HC |
273 | l %r2,.Linitrd # ramdisk loc. is temp |
274 | bas %r14,.Lloader # load parameter file | |
275 | ltr %r2,%r2 # got anything ? | |
276 | bz .Lnopf | |
277 | chi %r2,895 | |
278 | bnh .Lnotrunc | |
279 | la %r2,895 | |
1da177e4 | 280 | .Lnotrunc: |
25d83cbf HC |
281 | l %r4,.Linitrd |
282 | clc 0(3,%r4),.L_hdr # if it is HDRx | |
283 | bz .Lagain1 # skip dataset header | |
284 | clc 0(3,%r4),.L_eof # if it is EOFx | |
285 | bz .Lagain1 # skip dateset trailer | |
286 | la %r5,0(%r4,%r2) | |
287 | lr %r3,%r2 | |
61fd330d | 288 | la %r3,COMMAND_LINE-PARMAREA(%r12) # load adr. of command line |
25d83cbf HC |
289 | mvc 0(256,%r3),0(%r4) |
290 | mvc 256(256,%r3),256(%r4) | |
291 | mvc 512(256,%r3),512(%r4) | |
292 | mvc 768(122,%r3),768(%r4) | |
293 | slr %r0,%r0 | |
294 | b .Lcntlp | |
1da177e4 | 295 | .Ldelspc: |
25d83cbf HC |
296 | ic %r0,0(%r2,%r3) |
297 | chi %r0,0x20 # is it a space ? | |
298 | be .Lcntlp | |
299 | ahi %r2,1 | |
300 | b .Leolp | |
1da177e4 | 301 | .Lcntlp: |
25d83cbf | 302 | brct %r2,.Ldelspc |
1da177e4 | 303 | .Leolp: |
25d83cbf HC |
304 | slr %r0,%r0 |
305 | stc %r0,0(%r2,%r3) # terminate buffer | |
1da177e4 LT |
306 | .Lnopf: |
307 | ||
308 | # | |
309 | # load ramdisk from ipl device | |
25d83cbf | 310 | # |
1da177e4 | 311 | .Lagain2: |
25d83cbf HC |
312 | l %r2,.Linitrd # addr of ramdisk |
313 | st %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) | |
314 | bas %r14,.Lloader # load ramdisk | |
315 | st %r2,INITRD_SIZE+ARCH_OFFSET-PARMAREA(%r12) # store size of rd | |
316 | ltr %r2,%r2 | |
317 | bnz .Lrdcont | |
318 | st %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) # no ramdisk found | |
1da177e4 | 319 | .Lrdcont: |
25d83cbf | 320 | l %r2,.Linitrd |
1da177e4 | 321 | |
25d83cbf HC |
322 | clc 0(3,%r2),.L_hdr # skip HDRx and EOFx |
323 | bz .Lagain2 | |
324 | clc 0(3,%r2),.L_eof | |
325 | bz .Lagain2 | |
1da177e4 LT |
326 | |
327 | #ifdef CONFIG_IPL_VM | |
328 | # | |
329 | # reset files in VM reader | |
330 | # | |
25d83cbf HC |
331 | stidp __LC_CPUID # store cpuid |
332 | tm __LC_CPUID,0xff # running VM ? | |
333 | bno .Lnoreset | |
334 | la %r2,.Lreset | |
335 | lhi %r3,26 | |
336 | diag %r2,%r3,8 | |
337 | la %r5,.Lirb | |
338 | stsch 0(%r5) # check if irq is pending | |
339 | tm 30(%r5),0x0f # by verifying if any of the | |
340 | bnz .Lwaitforirq # activity or status control | |
341 | tm 31(%r5),0xff # bits is set in the schib | |
342 | bz .Lnoreset | |
350e3ade | 343 | .Lwaitforirq: |
25d83cbf | 344 | mvc 0x78(8),.Lrdrnewpsw # set up IO interrupt psw |
2b071886 | 345 | .Lwaitrdrirq: |
25d83cbf | 346 | lpsw .Lrdrwaitpsw |
2b071886 | 347 | .Lrdrint: |
25d83cbf HC |
348 | c %r1,0xb8 # compare subchannel number |
349 | bne .Lwaitrdrirq | |
350 | la %r5,.Lirb | |
351 | tsch 0(%r5) | |
1da177e4 | 352 | .Lnoreset: |
25d83cbf | 353 | b .Lnoload |
2b071886 | 354 | |
25d83cbf | 355 | .align 8 |
2b071886 | 356 | .Lrdrnewpsw: |
25d83cbf | 357 | .long 0x00080000,0x80000000+.Lrdrint |
2b071886 | 358 | .Lrdrwaitpsw: |
25d83cbf | 359 | .long 0x020a0000,0x80000000+.Lrdrint |
1da177e4 | 360 | #endif |
2b071886 | 361 | |
1da177e4 LT |
362 | # |
363 | # everything loaded, go for it | |
364 | # | |
365 | .Lnoload: | |
25d83cbf HC |
366 | l %r1,.Lstartup |
367 | br %r1 | |
1da177e4 | 368 | |
25d83cbf | 369 | .Linitrd:.long _end + 0x400000 # default address of initrd |
1da177e4 LT |
370 | .Lparm: .long PARMAREA |
371 | .Lstartup: .long startup | |
25d83cbf HC |
372 | .Lreset:.byte 0xc3,0xc8,0xc1,0xd5,0xc7,0xc5,0x40,0xd9,0xc4,0xd9,0x40 |
373 | .byte 0xc1,0xd3,0xd3,0x40,0xd2,0xc5,0xc5,0xd7,0x40,0xd5,0xd6 | |
374 | .byte 0xc8,0xd6,0xd3,0xc4 # "change rdr all keep nohold" | |
375 | .L_eof: .long 0xc5d6c600 /* C'EOF' */ | |
376 | .L_hdr: .long 0xc8c4d900 /* C'HDR' */ | |
1da177e4 | 377 | |
25d83cbf | 378 | #endif /* CONFIG_IPL */ |
1da177e4 LT |
379 | |
380 | # | |
381 | # SALIPL loader support. Based on a patch by Rob van der Heij. | |
382 | # This entry point is called directly from the SALIPL loader and | |
383 | # doesn't need a builtin ipl record. | |
384 | # | |
25d83cbf HC |
385 | .org 0x800 |
386 | .globl start | |
1da177e4 | 387 | start: |
25d83cbf HC |
388 | stm %r0,%r15,0x07b0 # store registers |
389 | basr %r12,%r0 | |
1da177e4 | 390 | .base: |
25d83cbf HC |
391 | l %r11,.parm |
392 | l %r8,.cmd # pointer to command buffer | |
1da177e4 | 393 | |
25d83cbf HC |
394 | ltr %r9,%r9 # do we have SALIPL parameters? |
395 | bp .sk8x8 | |
1da177e4 | 396 | |
25d83cbf HC |
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 | |
1da177e4 | 401 | .sk8x8: |
25d83cbf | 402 | mvc 0(240,%r8),0(%r9) # copy iplparms into buffer |
1da177e4 | 403 | .gotr: |
25d83cbf HC |
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 | |
25d83cbf HC |
408 | .cmd: .long COMMAND_LINE # address of command line buffer |
409 | .parm: .long PARMAREA | |
1da177e4 | 410 | .lowcase: |
25d83cbf | 411 | .byte 0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07 |
1da177e4 | 412 | .byte 0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f |
25d83cbf | 413 | .byte 0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17 |
1da177e4 | 414 | .byte 0x18,0x19,0x1a,0x1b,0x1c,0x1d,0x1e,0x1f |
25d83cbf | 415 | .byte 0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27 |
1da177e4 | 416 | .byte 0x28,0x29,0x2a,0x2b,0x2c,0x2d,0x2e,0x2f |
25d83cbf | 417 | .byte 0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37 |
1da177e4 | 418 | .byte 0x38,0x39,0x3a,0x3b,0x3c,0x3d,0x3e,0x3f |
25d83cbf | 419 | .byte 0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47 |
1da177e4 | 420 | .byte 0x48,0x49,0x4a,0x4b,0x4c,0x4d,0x4e,0x4f |
25d83cbf | 421 | .byte 0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57 |
1da177e4 | 422 | .byte 0x58,0x59,0x5a,0x5b,0x5c,0x5d,0x5e,0x5f |
25d83cbf | 423 | .byte 0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67 |
1da177e4 | 424 | .byte 0x68,0x69,0x6a,0x6b,0x6c,0x6d,0x6e,0x6f |
25d83cbf | 425 | .byte 0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77 |
1da177e4 LT |
426 | .byte 0x78,0x79,0x7a,0x7b,0x7c,0x7d,0x7e,0x7f |
427 | ||
25d83cbf | 428 | .byte 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87 |
1da177e4 | 429 | .byte 0x88,0x89,0x8a,0x8b,0x8c,0x8d,0x8e,0x8f |
25d83cbf | 430 | .byte 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97 |
1da177e4 | 431 | .byte 0x98,0x99,0x9a,0x9b,0x9c,0x9d,0x9e,0x9f |
25d83cbf | 432 | .byte 0xa0,0xa1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7 |
1da177e4 | 433 | .byte 0xa8,0xa9,0xaa,0xab,0xac,0xad,0xae,0xaf |
25d83cbf | 434 | .byte 0xb0,0xb1,0xb2,0xb3,0xb4,0xb5,0xb6,0xb7 |
1da177e4 | 435 | .byte 0xb8,0xb9,0xba,0xbb,0xbc,0xbd,0xbe,0xbf |
25d83cbf | 436 | .byte 0xc0,0x81,0x82,0x83,0x84,0x85,0x86,0x87 # .abcdefg |
1da177e4 | 437 | .byte 0x88,0x89,0xca,0xcb,0xcc,0xcd,0xce,0xcf # hi |
25d83cbf | 438 | .byte 0xd0,0x91,0x92,0x93,0x94,0x95,0x96,0x97 # .jklmnop |
1da177e4 LT |
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 | |
25d83cbf | 442 | .byte 0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7 |
1da177e4 LT |
443 | .byte 0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfe,0xff |
444 | ||
e37f50e1 MS |
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 | |
1844c9bc MS |
451 | .globl startup |
452 | startup: | |
453 | basr %r13,0 # get base | |
e37f50e1 | 454 | .LPG0: |
866ba284 MS |
455 | xc 0x200(256),0x200 # partially clear lowcore |
456 | xc 0x300(256),0x300 | |
1844c9bc MS |
457 | stck __LC_LAST_UPDATE_CLOCK |
458 | spt 5f-.LPG0(%r13) | |
459 | mvc __LC_LAST_UPDATE_TIMER(8),5f-.LPG0(%r13) | |
e37f50e1 | 460 | #ifndef CONFIG_MARCH_G5 |
8c4caa4f MS |
461 | # check capabilities against MARCH_{G5,Z900,Z990,Z9_109,Z10} |
462 | xc __LC_STFL_FAC_LIST(8),__LC_STFL_FAC_LIST | |
463 | stfl __LC_STFL_FAC_LIST # store facility list | |
464 | tm __LC_STFL_FAC_LIST,0x01 # stfle available ? | |
465 | jz 0f | |
466 | la %r0,0 | |
467 | .insn s,0xb2b00000,__LC_STFL_FAC_LIST # store facility list extended | |
468 | 0: l %r0,__LC_STFL_FAC_LIST | |
469 | n %r0,2f+8-.LPG0(%r13) | |
470 | cl %r0,2f+8-.LPG0(%r13) | |
471 | jne 1f | |
472 | l %r0,__LC_STFL_FAC_LIST+4 | |
473 | n %r0,2f+12-.LPG0(%r13) | |
474 | cl %r0,2f+12-.LPG0(%r13) | |
475 | je 3f | |
d90cbd46 | 476 | 1: l %r15,.Lstack-.LPG0(%r13) |
d90cbd46 HC |
477 | ahi %r15,-96 |
478 | la %r2,.Lals_string-.LPG0(%r13) | |
479 | l %r3,.Lsclp_print-.LPG0(%r13) | |
480 | basr %r14,%r3 | |
481 | lpsw 2f-.LPG0(%r13) # machine type not good enough, crash | |
482 | .Lals_string: | |
483 | .asciz "The Linux kernel requires more recent processor hardware" | |
484 | .Lsclp_print: | |
485 | .long _sclp_print_early | |
486 | .Lstack: | |
1844c9bc | 487 | .long 0x8000 + (1<<(PAGE_SHIFT+THREAD_ORDER)) |
e37f50e1 | 488 | .align 16 |
8c4caa4f MS |
489 | 2: .long 0x000a0000,0x8badcccc |
490 | #if defined(CONFIG_64BIT) | |
491 | #if defined(CONFIG_MARCH_Z10) | |
492 | .long 0xc100efe3, 0xf0680000 | |
493 | #elif defined(CONFIG_MARCH_Z9_109) | |
494 | .long 0xc100efc3, 0x00000000 | |
495 | #elif defined(CONFIG_MARCH_Z990) | |
496 | .long 0xc0002000, 0x00000000 | |
497 | #elif defined(CONFIG_MARCH_Z900) | |
498 | .long 0xc0000000, 0x00000000 | |
499 | #endif | |
500 | #else | |
e37f50e1 | 501 | #if defined(CONFIG_MARCH_Z10) |
8c4caa4f | 502 | .long 0x8100c880, 0x00000000 |
e37f50e1 | 503 | #elif defined(CONFIG_MARCH_Z9_109) |
8c4caa4f | 504 | .long 0x8100c880, 0x00000000 |
e37f50e1 | 505 | #elif defined(CONFIG_MARCH_Z990) |
8c4caa4f | 506 | .long 0x80002000, 0x00000000 |
e37f50e1 | 507 | #elif defined(CONFIG_MARCH_Z900) |
8c4caa4f MS |
508 | .long 0x80000000, 0x00000000 |
509 | #endif | |
e37f50e1 | 510 | #endif |
8c4caa4f | 511 | 3: |
e37f50e1 MS |
512 | #endif |
513 | ||
1844c9bc MS |
514 | #ifdef CONFIG_64BIT |
515 | mvi __LC_AR_MODE_ID,1 # set esame flag | |
516 | slr %r0,%r0 # set cpuid to zero | |
517 | lhi %r1,2 # mode 2 = esame (dump) | |
518 | sigp %r1,%r0,0x12 # switch to esame mode | |
519 | sam64 # switch to 64 bit mode | |
06c0dd72 MS |
520 | larl %r13,4f |
521 | lmh %r0,%r15,0(%r13) # clear high-order half | |
1844c9bc | 522 | jg startup_continue |
06c0dd72 | 523 | 4: .fill 16,4,0x0 |
1844c9bc MS |
524 | #else |
525 | mvi __LC_AR_MODE_ID,0 # set ESA flag (mode 0) | |
b6112ccb | 526 | l %r13,4f-.LPG0(%r13) |
e37f50e1 | 527 | b 0(%r13) |
1844c9bc | 528 | .align 8 |
b6112ccb | 529 | 4: .long startup_continue |
1844c9bc | 530 | #endif |
ab96e798 | 531 | .align 8 |
1844c9bc | 532 | 5: .long 0x7fffffff,0xffffffff |
e37f50e1 MS |
533 | |
534 | # | |
535 | # params at 10400 (setup.h) | |
536 | # | |
537 | .org PARMAREA | |
538 | .long 0,0 # IPL_DEVICE | |
539 | .long 0,0 # INITRD_START | |
540 | .long 0,0 # INITRD_SIZE | |
541 | ||
542 | .org COMMAND_LINE | |
543 | .byte "root=/dev/ram0 ro" | |
544 | .byte 0 | |
545 | ||
1844c9bc | 546 | .org 0x11000 |