Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/agpgart
[linux-2.6] / arch / s390 / kernel / setup.c
1 /*
2  *  arch/s390/kernel/setup.c
3  *
4  *  S390 version
5  *    Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
6  *    Author(s): Hartmut Penner (hp@de.ibm.com),
7  *               Martin Schwidefsky (schwidefsky@de.ibm.com)
8  *
9  *  Derived from "arch/i386/kernel/setup.c"
10  *    Copyright (C) 1995, Linus Torvalds
11  */
12
13 /*
14  * This file handles the architecture-dependent parts of initialization
15  */
16
17 #include <linux/errno.h>
18 #include <linux/module.h>
19 #include <linux/sched.h>
20 #include <linux/kernel.h>
21 #include <linux/mm.h>
22 #include <linux/stddef.h>
23 #include <linux/unistd.h>
24 #include <linux/ptrace.h>
25 #include <linux/slab.h>
26 #include <linux/user.h>
27 #include <linux/a.out.h>
28 #include <linux/tty.h>
29 #include <linux/ioport.h>
30 #include <linux/delay.h>
31 #include <linux/config.h>
32 #include <linux/init.h>
33 #include <linux/initrd.h>
34 #include <linux/bootmem.h>
35 #include <linux/root_dev.h>
36 #include <linux/console.h>
37 #include <linux/seq_file.h>
38 #include <linux/kernel_stat.h>
39 #include <linux/device.h>
40
41 #include <asm/uaccess.h>
42 #include <asm/system.h>
43 #include <asm/smp.h>
44 #include <asm/mmu_context.h>
45 #include <asm/cpcmd.h>
46 #include <asm/lowcore.h>
47 #include <asm/irq.h>
48 #include <asm/page.h>
49 #include <asm/ptrace.h>
50
51 /*
52  * Machine setup..
53  */
54 unsigned int console_mode = 0;
55 unsigned int console_devno = -1;
56 unsigned int console_irq = -1;
57 unsigned long memory_size = 0;
58 unsigned long machine_flags = 0;
59 struct {
60         unsigned long addr, size, type;
61 } memory_chunk[MEMORY_CHUNKS] = { { 0 } };
62 #define CHUNK_READ_WRITE 0
63 #define CHUNK_READ_ONLY 1
64 volatile int __cpu_logical_map[NR_CPUS]; /* logical cpu to cpu address */
65 unsigned long __initdata zholes_size[MAX_NR_ZONES];
66 static unsigned long __initdata memory_end;
67
68 /*
69  * Setup options
70  */
71 extern int _text,_etext, _edata, _end;
72
73 /*
74  * This is set up by the setup-routine at boot-time
75  * for S390 need to find out, what we have to setup
76  * using address 0x10400 ...
77  */
78
79 #include <asm/setup.h>
80
81 static char command_line[COMMAND_LINE_SIZE] = { 0, };
82
83 static struct resource code_resource = {
84         .name  = "Kernel code",
85         .start = (unsigned long) &_text,
86         .end = (unsigned long) &_etext - 1,
87         .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
88 };
89
90 static struct resource data_resource = {
91         .name = "Kernel data",
92         .start = (unsigned long) &_etext,
93         .end = (unsigned long) &_edata - 1,
94         .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
95 };
96
97 /*
98  * cpu_init() initializes state that is per-CPU.
99  */
100 void __devinit cpu_init (void)
101 {
102         int addr = hard_smp_processor_id();
103
104         /*
105          * Store processor id in lowcore (used e.g. in timer_interrupt)
106          */
107         asm volatile ("stidp %0": "=m" (S390_lowcore.cpu_data.cpu_id));
108         S390_lowcore.cpu_data.cpu_addr = addr;
109
110         /*
111          * Force FPU initialization:
112          */
113         clear_thread_flag(TIF_USEDFPU);
114         clear_used_math();
115
116         atomic_inc(&init_mm.mm_count);
117         current->active_mm = &init_mm;
118         if (current->mm)
119                 BUG();
120         enter_lazy_tlb(&init_mm, current);
121 }
122
123 /*
124  * VM halt and poweroff setup routines
125  */
126 char vmhalt_cmd[128] = "";
127 char vmpoff_cmd[128] = "";
128
129 static inline void strncpy_skip_quote(char *dst, char *src, int n)
130 {
131         int sx, dx;
132
133         dx = 0;
134         for (sx = 0; src[sx] != 0; sx++) {
135                 if (src[sx] == '"') continue;
136                 dst[dx++] = src[sx];
137                 if (dx >= n) break;
138         }
139 }
140
141 static int __init vmhalt_setup(char *str)
142 {
143         strncpy_skip_quote(vmhalt_cmd, str, 127);
144         vmhalt_cmd[127] = 0;
145         return 1;
146 }
147
148 __setup("vmhalt=", vmhalt_setup);
149
150 static int __init vmpoff_setup(char *str)
151 {
152         strncpy_skip_quote(vmpoff_cmd, str, 127);
153         vmpoff_cmd[127] = 0;
154         return 1;
155 }
156
157 __setup("vmpoff=", vmpoff_setup);
158
159 /*
160  * condev= and conmode= setup parameter.
161  */
162
163 static int __init condev_setup(char *str)
164 {
165         int vdev;
166
167         vdev = simple_strtoul(str, &str, 0);
168         if (vdev >= 0 && vdev < 65536) {
169                 console_devno = vdev;
170                 console_irq = -1;
171         }
172         return 1;
173 }
174
175 __setup("condev=", condev_setup);
176
177 static int __init conmode_setup(char *str)
178 {
179 #if defined(CONFIG_SCLP_CONSOLE)
180         if (strncmp(str, "hwc", 4) == 0 || strncmp(str, "sclp", 5) == 0)
181                 SET_CONSOLE_SCLP;
182 #endif
183 #if defined(CONFIG_TN3215_CONSOLE)
184         if (strncmp(str, "3215", 5) == 0)
185                 SET_CONSOLE_3215;
186 #endif
187 #if defined(CONFIG_TN3270_CONSOLE)
188         if (strncmp(str, "3270", 5) == 0)
189                 SET_CONSOLE_3270;
190 #endif
191         return 1;
192 }
193
194 __setup("conmode=", conmode_setup);
195
196 static void __init conmode_default(void)
197 {
198         char query_buffer[1024];
199         char *ptr;
200
201         if (MACHINE_IS_VM) {
202                 __cpcmd("QUERY CONSOLE", query_buffer, 1024, NULL);
203                 console_devno = simple_strtoul(query_buffer + 5, NULL, 16);
204                 ptr = strstr(query_buffer, "SUBCHANNEL =");
205                 console_irq = simple_strtoul(ptr + 13, NULL, 16);
206                 __cpcmd("QUERY TERM", query_buffer, 1024, NULL);
207                 ptr = strstr(query_buffer, "CONMODE");
208                 /*
209                  * Set the conmode to 3215 so that the device recognition 
210                  * will set the cu_type of the console to 3215. If the
211                  * conmode is 3270 and we don't set it back then both
212                  * 3215 and the 3270 driver will try to access the console
213                  * device (3215 as console and 3270 as normal tty).
214                  */
215                 __cpcmd("TERM CONMODE 3215", NULL, 0, NULL);
216                 if (ptr == NULL) {
217 #if defined(CONFIG_SCLP_CONSOLE)
218                         SET_CONSOLE_SCLP;
219 #endif
220                         return;
221                 }
222                 if (strncmp(ptr + 8, "3270", 4) == 0) {
223 #if defined(CONFIG_TN3270_CONSOLE)
224                         SET_CONSOLE_3270;
225 #elif defined(CONFIG_TN3215_CONSOLE)
226                         SET_CONSOLE_3215;
227 #elif defined(CONFIG_SCLP_CONSOLE)
228                         SET_CONSOLE_SCLP;
229 #endif
230                 } else if (strncmp(ptr + 8, "3215", 4) == 0) {
231 #if defined(CONFIG_TN3215_CONSOLE)
232                         SET_CONSOLE_3215;
233 #elif defined(CONFIG_TN3270_CONSOLE)
234                         SET_CONSOLE_3270;
235 #elif defined(CONFIG_SCLP_CONSOLE)
236                         SET_CONSOLE_SCLP;
237 #endif
238                 }
239         } else if (MACHINE_IS_P390) {
240 #if defined(CONFIG_TN3215_CONSOLE)
241                 SET_CONSOLE_3215;
242 #elif defined(CONFIG_TN3270_CONSOLE)
243                 SET_CONSOLE_3270;
244 #endif
245         } else {
246 #if defined(CONFIG_SCLP_CONSOLE)
247                 SET_CONSOLE_SCLP;
248 #endif
249         }
250 }
251
252 #ifdef CONFIG_SMP
253 extern void machine_restart_smp(char *);
254 extern void machine_halt_smp(void);
255 extern void machine_power_off_smp(void);
256
257 void (*_machine_restart)(char *command) = machine_restart_smp;
258 void (*_machine_halt)(void) = machine_halt_smp;
259 void (*_machine_power_off)(void) = machine_power_off_smp;
260 #else
261 /*
262  * Reboot, halt and power_off routines for non SMP.
263  */
264 extern void reipl(unsigned long devno);
265 extern void reipl_diag(void);
266 static void do_machine_restart_nonsmp(char * __unused)
267 {
268         reipl_diag();
269
270         if (MACHINE_IS_VM)
271                 cpcmd ("IPL", NULL, 0);
272         else
273                 reipl (0x10000 | S390_lowcore.ipl_device);
274 }
275
276 static void do_machine_halt_nonsmp(void)
277 {
278         if (MACHINE_IS_VM && strlen(vmhalt_cmd) > 0)
279                 cpcmd(vmhalt_cmd, NULL, 0);
280         signal_processor(smp_processor_id(), sigp_stop_and_store_status);
281 }
282
283 static void do_machine_power_off_nonsmp(void)
284 {
285         if (MACHINE_IS_VM && strlen(vmpoff_cmd) > 0)
286                 cpcmd(vmpoff_cmd, NULL, 0);
287         signal_processor(smp_processor_id(), sigp_stop_and_store_status);
288 }
289
290 void (*_machine_restart)(char *command) = do_machine_restart_nonsmp;
291 void (*_machine_halt)(void) = do_machine_halt_nonsmp;
292 void (*_machine_power_off)(void) = do_machine_power_off_nonsmp;
293 #endif
294
295  /*
296  * Reboot, halt and power_off stubs. They just call _machine_restart,
297  * _machine_halt or _machine_power_off. 
298  */
299
300 void machine_restart(char *command)
301 {
302         console_unblank();
303         _machine_restart(command);
304 }
305
306 void machine_halt(void)
307 {
308         console_unblank();
309         _machine_halt();
310 }
311
312 void machine_power_off(void)
313 {
314         console_unblank();
315         _machine_power_off();
316 }
317
318 static void __init
319 add_memory_hole(unsigned long start, unsigned long end)
320 {
321         unsigned long dma_pfn = MAX_DMA_ADDRESS >> PAGE_SHIFT;
322
323         if (end <= dma_pfn)
324                 zholes_size[ZONE_DMA] += end - start + 1;
325         else if (start > dma_pfn)
326                 zholes_size[ZONE_NORMAL] += end - start + 1;
327         else {
328                 zholes_size[ZONE_DMA] += dma_pfn - start + 1;
329                 zholes_size[ZONE_NORMAL] += end - dma_pfn;
330         }
331 }
332
333 static void __init
334 parse_cmdline_early(char **cmdline_p)
335 {
336         char c = ' ', cn, *to = command_line, *from = COMMAND_LINE;
337         unsigned long delay = 0;
338
339         /* Save unparsed command line copy for /proc/cmdline */
340         memcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE);
341         saved_command_line[COMMAND_LINE_SIZE-1] = '\0';
342
343         for (;;) {
344                 /*
345                  * "mem=XXX[kKmM]" sets memsize
346                  */
347                 if (c == ' ' && strncmp(from, "mem=", 4) == 0) {
348                         memory_end = simple_strtoul(from+4, &from, 0);
349                         if ( *from == 'K' || *from == 'k' ) {
350                                 memory_end = memory_end << 10;
351                                 from++;
352                         } else if ( *from == 'M' || *from == 'm' ) {
353                                 memory_end = memory_end << 20;
354                                 from++;
355                         }
356                 }
357                 /*
358                  * "ipldelay=XXX[sm]" sets ipl delay in seconds or minutes
359                  */
360                 if (c == ' ' && strncmp(from, "ipldelay=", 9) == 0) {
361                         delay = simple_strtoul(from+9, &from, 0);
362                         if (*from == 's' || *from == 'S') {
363                                 delay = delay*1000000;
364                                 from++;
365                         } else if (*from == 'm' || *from == 'M') {
366                                 delay = delay*60*1000000;
367                                 from++;
368                         }
369                         /* now wait for the requested amount of time */
370                         udelay(delay);
371                 }
372                 cn = *(from++);
373                 if (!cn)
374                         break;
375                 if (cn == '\n')
376                         cn = ' ';  /* replace newlines with space */
377                 if (cn == 0x0d)
378                         cn = ' ';  /* replace 0x0d with space */
379                 if (cn == ' ' && c == ' ')
380                         continue;  /* remove additional spaces */
381                 c = cn;
382                 if (to - command_line >= COMMAND_LINE_SIZE)
383                         break;
384                 *(to++) = c;
385         }
386         if (c == ' ' && to > command_line) to--;
387         *to = '\0';
388         *cmdline_p = command_line;
389 }
390
391 static void __init
392 setup_lowcore(void)
393 {
394         struct _lowcore *lc;
395         int lc_pages;
396
397         /*
398          * Setup lowcore for boot cpu
399          */
400         lc_pages = sizeof(void *) == 8 ? 2 : 1;
401         lc = (struct _lowcore *)
402                 __alloc_bootmem(lc_pages * PAGE_SIZE, lc_pages * PAGE_SIZE, 0);
403         memset(lc, 0, lc_pages * PAGE_SIZE);
404         lc->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY;
405         lc->restart_psw.addr =
406                 PSW_ADDR_AMODE | (unsigned long) restart_int_handler;
407         lc->external_new_psw.mask = PSW_KERNEL_BITS;
408         lc->external_new_psw.addr =
409                 PSW_ADDR_AMODE | (unsigned long) ext_int_handler;
410         lc->svc_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_IO | PSW_MASK_EXT;
411         lc->svc_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) system_call;
412         lc->program_new_psw.mask = PSW_KERNEL_BITS;
413         lc->program_new_psw.addr =
414                 PSW_ADDR_AMODE | (unsigned long)pgm_check_handler;
415         lc->mcck_new_psw.mask =
416                 PSW_KERNEL_BITS & ~PSW_MASK_MCHECK & ~PSW_MASK_DAT;
417         lc->mcck_new_psw.addr =
418                 PSW_ADDR_AMODE | (unsigned long) mcck_int_handler;
419         lc->io_new_psw.mask = PSW_KERNEL_BITS;
420         lc->io_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) io_int_handler;
421         lc->ipl_device = S390_lowcore.ipl_device;
422         lc->jiffy_timer = -1LL;
423         lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE;
424         lc->async_stack = (unsigned long)
425                 __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0) + ASYNC_SIZE;
426         lc->panic_stack = (unsigned long)
427                 __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0) + PAGE_SIZE;
428         lc->current_task = (unsigned long) init_thread_union.thread_info.task;
429         lc->thread_info = (unsigned long) &init_thread_union;
430 #ifndef CONFIG_ARCH_S390X
431         if (MACHINE_HAS_IEEE) {
432                 lc->extended_save_area_addr = (__u32)
433                         __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0);
434                 /* enable extended save area */
435                 ctl_set_bit(14, 29);
436         }
437 #endif
438         set_prefix((u32)(unsigned long) lc);
439 }
440
441 static void __init
442 setup_resources(void)
443 {
444         struct resource *res;
445         int i;
446
447         for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
448                 res = alloc_bootmem_low(sizeof(struct resource));
449                 res->flags = IORESOURCE_BUSY | IORESOURCE_MEM;
450                 switch (memory_chunk[i].type) {
451                 case CHUNK_READ_WRITE:
452                         res->name = "System RAM";
453                         break;
454                 case CHUNK_READ_ONLY:
455                         res->name = "System ROM";
456                         res->flags |= IORESOURCE_READONLY;
457                         break;
458                 default:
459                         res->name = "reserved";
460                 }
461                 res->start = memory_chunk[i].addr;
462                 res->end = memory_chunk[i].addr +  memory_chunk[i].size - 1;
463                 request_resource(&iomem_resource, res);
464                 request_resource(res, &code_resource);
465                 request_resource(res, &data_resource);
466         }
467 }
468
469 static void __init
470 setup_memory(void)
471 {
472         unsigned long bootmap_size;
473         unsigned long start_pfn, end_pfn, init_pfn;
474         unsigned long last_rw_end;
475         int i;
476
477         /*
478          * partially used pages are not usable - thus
479          * we are rounding upwards:
480          */
481         start_pfn = (__pa(&_end) + PAGE_SIZE - 1) >> PAGE_SHIFT;
482         end_pfn = max_pfn = memory_end >> PAGE_SHIFT;
483
484         /* Initialize storage key for kernel pages */
485         for (init_pfn = 0 ; init_pfn < start_pfn; init_pfn++)
486                 page_set_storage_key(init_pfn << PAGE_SHIFT, PAGE_DEFAULT_KEY);
487
488         /*
489          * Initialize the boot-time allocator (with low memory only):
490          */
491         bootmap_size = init_bootmem(start_pfn, end_pfn);
492
493         /*
494          * Register RAM areas with the bootmem allocator.
495          */
496         last_rw_end = start_pfn;
497
498         for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
499                 unsigned long start_chunk, end_chunk;
500
501                 if (memory_chunk[i].type != CHUNK_READ_WRITE)
502                         continue;
503                 start_chunk = (memory_chunk[i].addr + PAGE_SIZE - 1);
504                 start_chunk >>= PAGE_SHIFT;
505                 end_chunk = (memory_chunk[i].addr + memory_chunk[i].size);
506                 end_chunk >>= PAGE_SHIFT;
507                 if (start_chunk < start_pfn)
508                         start_chunk = start_pfn;
509                 if (end_chunk > end_pfn)
510                         end_chunk = end_pfn;
511                 if (start_chunk < end_chunk) {
512                         /* Initialize storage key for RAM pages */
513                         for (init_pfn = start_chunk ; init_pfn < end_chunk;
514                              init_pfn++)
515                                 page_set_storage_key(init_pfn << PAGE_SHIFT,
516                                                      PAGE_DEFAULT_KEY);
517                         free_bootmem(start_chunk << PAGE_SHIFT,
518                                      (end_chunk - start_chunk) << PAGE_SHIFT);
519                         if (last_rw_end < start_chunk)
520                                 add_memory_hole(last_rw_end, start_chunk - 1);
521                         last_rw_end = end_chunk;
522                 }
523         }
524
525         psw_set_key(PAGE_DEFAULT_KEY);
526
527         if (last_rw_end < end_pfn - 1)
528                 add_memory_hole(last_rw_end, end_pfn - 1);
529
530         /*
531          * Reserve the bootmem bitmap itself as well. We do this in two
532          * steps (first step was init_bootmem()) because this catches
533          * the (very unlikely) case of us accidentally initializing the
534          * bootmem allocator with an invalid RAM area.
535          */
536         reserve_bootmem(start_pfn << PAGE_SHIFT, bootmap_size);
537
538 #ifdef CONFIG_BLK_DEV_INITRD
539         if (INITRD_START) {
540                 if (INITRD_START + INITRD_SIZE <= memory_end) {
541                         reserve_bootmem(INITRD_START, INITRD_SIZE);
542                         initrd_start = INITRD_START;
543                         initrd_end = initrd_start + INITRD_SIZE;
544                 } else {
545                         printk("initrd extends beyond end of memory "
546                                "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
547                                initrd_start + INITRD_SIZE, memory_end);
548                         initrd_start = initrd_end = 0;
549                 }
550         }
551 #endif
552 }
553
554 /*
555  * Setup function called from init/main.c just after the banner
556  * was printed.
557  */
558
559 void __init
560 setup_arch(char **cmdline_p)
561 {
562         /*
563          * print what head.S has found out about the machine
564          */
565 #ifndef CONFIG_ARCH_S390X
566         printk((MACHINE_IS_VM) ?
567                "We are running under VM (31 bit mode)\n" :
568                "We are running native (31 bit mode)\n");
569         printk((MACHINE_HAS_IEEE) ?
570                "This machine has an IEEE fpu\n" :
571                "This machine has no IEEE fpu\n");
572 #else /* CONFIG_ARCH_S390X */
573         printk((MACHINE_IS_VM) ?
574                "We are running under VM (64 bit mode)\n" :
575                "We are running native (64 bit mode)\n");
576 #endif /* CONFIG_ARCH_S390X */
577
578         ROOT_DEV = Root_RAM0;
579 #ifndef CONFIG_ARCH_S390X
580         memory_end = memory_size & ~0x400000UL;  /* align memory end to 4MB */
581         /*
582          * We need some free virtual space to be able to do vmalloc.
583          * On a machine with 2GB memory we make sure that we have at
584          * least 128 MB free space for vmalloc.
585          */
586         if (memory_end > 1920*1024*1024)
587                 memory_end = 1920*1024*1024;
588 #else /* CONFIG_ARCH_S390X */
589         memory_end = memory_size & ~0x200000UL;  /* detected in head.s */
590 #endif /* CONFIG_ARCH_S390X */
591
592         init_mm.start_code = PAGE_OFFSET;
593         init_mm.end_code = (unsigned long) &_etext;
594         init_mm.end_data = (unsigned long) &_edata;
595         init_mm.brk = (unsigned long) &_end;
596
597         parse_cmdline_early(cmdline_p);
598
599         setup_memory();
600         setup_resources();
601         setup_lowcore();
602
603         cpu_init();
604         __cpu_logical_map[0] = S390_lowcore.cpu_data.cpu_addr;
605
606         /*
607          * Create kernel page tables and switch to virtual addressing.
608          */
609         paging_init();
610
611         /* Setup default console */
612         conmode_default();
613 }
614
615 void print_cpu_info(struct cpuinfo_S390 *cpuinfo)
616 {
617    printk("cpu %d "
618 #ifdef CONFIG_SMP
619            "phys_idx=%d "
620 #endif
621            "vers=%02X ident=%06X machine=%04X unused=%04X\n",
622            cpuinfo->cpu_nr,
623 #ifdef CONFIG_SMP
624            cpuinfo->cpu_addr,
625 #endif
626            cpuinfo->cpu_id.version,
627            cpuinfo->cpu_id.ident,
628            cpuinfo->cpu_id.machine,
629            cpuinfo->cpu_id.unused);
630 }
631
632 /*
633  * show_cpuinfo - Get information on one CPU for use by procfs.
634  */
635
636 static int show_cpuinfo(struct seq_file *m, void *v)
637 {
638         struct cpuinfo_S390 *cpuinfo;
639         unsigned long n = (unsigned long) v - 1;
640
641         preempt_disable();
642         if (!n) {
643                 seq_printf(m, "vendor_id       : IBM/S390\n"
644                                "# processors    : %i\n"
645                                "bogomips per cpu: %lu.%02lu\n",
646                                num_online_cpus(), loops_per_jiffy/(500000/HZ),
647                                (loops_per_jiffy/(5000/HZ))%100);
648         }
649         if (cpu_online(n)) {
650 #ifdef CONFIG_SMP
651                 if (smp_processor_id() == n)
652                         cpuinfo = &S390_lowcore.cpu_data;
653                 else
654                         cpuinfo = &lowcore_ptr[n]->cpu_data;
655 #else
656                 cpuinfo = &S390_lowcore.cpu_data;
657 #endif
658                 seq_printf(m, "processor %li: "
659                                "version = %02X,  "
660                                "identification = %06X,  "
661                                "machine = %04X\n",
662                                n, cpuinfo->cpu_id.version,
663                                cpuinfo->cpu_id.ident,
664                                cpuinfo->cpu_id.machine);
665         }
666         preempt_enable();
667         return 0;
668 }
669
670 static void *c_start(struct seq_file *m, loff_t *pos)
671 {
672         return *pos < NR_CPUS ? (void *)((unsigned long) *pos + 1) : NULL;
673 }
674 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
675 {
676         ++*pos;
677         return c_start(m, pos);
678 }
679 static void c_stop(struct seq_file *m, void *v)
680 {
681 }
682 struct seq_operations cpuinfo_op = {
683         .start  = c_start,
684         .next   = c_next,
685         .stop   = c_stop,
686         .show   = show_cpuinfo,
687 };
688
689 #define DEFINE_IPL_ATTR(_name, _format, _value)                 \
690 static ssize_t ipl_##_name##_show(struct subsystem *subsys,     \
691                 char *page)                                     \
692 {                                                               \
693         return sprintf(page, _format, _value);                  \
694 }                                                               \
695 static struct subsys_attribute ipl_##_name##_attr =             \
696         __ATTR(_name, S_IRUGO, ipl_##_name##_show, NULL);
697
698 DEFINE_IPL_ATTR(wwpn, "0x%016llx\n", (unsigned long long)
699                 IPL_PARMBLOCK_START->fcp.wwpn);
700 DEFINE_IPL_ATTR(lun, "0x%016llx\n", (unsigned long long)
701                 IPL_PARMBLOCK_START->fcp.lun);
702 DEFINE_IPL_ATTR(bootprog, "%lld\n", (unsigned long long)
703                 IPL_PARMBLOCK_START->fcp.bootprog);
704 DEFINE_IPL_ATTR(br_lba, "%lld\n", (unsigned long long)
705                 IPL_PARMBLOCK_START->fcp.br_lba);
706
707 enum ipl_type_type {
708         ipl_type_unknown,
709         ipl_type_ccw,
710         ipl_type_fcp,
711 };
712
713 static enum ipl_type_type
714 get_ipl_type(void)
715 {
716         struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
717
718         if (!IPL_DEVNO_VALID)
719                 return ipl_type_unknown;
720         if (!IPL_PARMBLOCK_VALID)
721                 return ipl_type_ccw;
722         if (ipl->hdr.header.version > IPL_MAX_SUPPORTED_VERSION)
723                 return ipl_type_unknown;
724         if (ipl->fcp.pbt != IPL_TYPE_FCP)
725                 return ipl_type_unknown;
726         return ipl_type_fcp;
727 }
728
729 static ssize_t
730 ipl_type_show(struct subsystem *subsys, char *page)
731 {
732         switch (get_ipl_type()) {
733         case ipl_type_ccw:
734                 return sprintf(page, "ccw\n");
735         case ipl_type_fcp:
736                 return sprintf(page, "fcp\n");
737         default:
738                 return sprintf(page, "unknown\n");
739         }
740 }
741
742 static struct subsys_attribute ipl_type_attr = __ATTR_RO(ipl_type);
743
744 static ssize_t
745 ipl_device_show(struct subsystem *subsys, char *page)
746 {
747         struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
748
749         switch (get_ipl_type()) {
750         case ipl_type_ccw:
751                 return sprintf(page, "0.0.%04x\n", ipl_devno);
752         case ipl_type_fcp:
753                 return sprintf(page, "0.0.%04x\n", ipl->fcp.devno);
754         default:
755                 return 0;
756         }
757 }
758
759 static struct subsys_attribute ipl_device_attr =
760         __ATTR(device, S_IRUGO, ipl_device_show, NULL);
761
762 static struct attribute *ipl_fcp_attrs[] = {
763         &ipl_type_attr.attr,
764         &ipl_device_attr.attr,
765         &ipl_wwpn_attr.attr,
766         &ipl_lun_attr.attr,
767         &ipl_bootprog_attr.attr,
768         &ipl_br_lba_attr.attr,
769         NULL,
770 };
771
772 static struct attribute_group ipl_fcp_attr_group = {
773         .attrs = ipl_fcp_attrs,
774 };
775
776 static struct attribute *ipl_ccw_attrs[] = {
777         &ipl_type_attr.attr,
778         &ipl_device_attr.attr,
779         NULL,
780 };
781
782 static struct attribute_group ipl_ccw_attr_group = {
783         .attrs = ipl_ccw_attrs,
784 };
785
786 static struct attribute *ipl_unknown_attrs[] = {
787         &ipl_type_attr.attr,
788         NULL,
789 };
790
791 static struct attribute_group ipl_unknown_attr_group = {
792         .attrs = ipl_unknown_attrs,
793 };
794
795 static ssize_t
796 ipl_parameter_read(struct kobject *kobj, char *buf, loff_t off, size_t count)
797 {
798         unsigned int size = IPL_PARMBLOCK_SIZE;
799
800         if (off > size)
801                 return 0;
802         if (off + count > size)
803                 count = size - off;
804
805         memcpy(buf, (void *) IPL_PARMBLOCK_START + off, count);
806         return count;
807 }
808
809 static struct bin_attribute ipl_parameter_attr = {
810         .attr = {
811                 .name = "binary_parameter",
812                 .mode = S_IRUGO,
813                 .owner = THIS_MODULE,
814         },
815         .size = PAGE_SIZE,
816         .read = &ipl_parameter_read,
817 };
818
819 static ssize_t
820 ipl_scp_data_read(struct kobject *kobj, char *buf, loff_t off, size_t count)
821 {
822         unsigned int size =  IPL_PARMBLOCK_START->fcp.scp_data_len;
823         void *scp_data = &IPL_PARMBLOCK_START->fcp.scp_data;
824
825         if (off > size)
826                 return 0;
827         if (off + count > size)
828                 count = size - off;
829
830         memcpy(buf, scp_data + off, count);
831         return count;
832 }
833
834 static struct bin_attribute ipl_scp_data_attr = {
835         .attr = {
836                 .name = "scp_data",
837                 .mode = S_IRUGO,
838                 .owner = THIS_MODULE,
839         },
840         .size = PAGE_SIZE,
841         .read = &ipl_scp_data_read,
842 };
843
844 static decl_subsys(ipl, NULL, NULL);
845
846 static int __init
847 ipl_device_sysfs_register(void) {
848         int rc;
849
850         rc = firmware_register(&ipl_subsys);
851         if (rc)
852                 return rc;
853
854         switch (get_ipl_type()) {
855         case ipl_type_ccw:
856                 sysfs_create_group(&ipl_subsys.kset.kobj, &ipl_ccw_attr_group);
857                 break;
858         case ipl_type_fcp:
859                 sysfs_create_group(&ipl_subsys.kset.kobj, &ipl_fcp_attr_group);
860                 sysfs_create_bin_file(&ipl_subsys.kset.kobj,
861                                       &ipl_parameter_attr);
862                 sysfs_create_bin_file(&ipl_subsys.kset.kobj,
863                                       &ipl_scp_data_attr);
864                 break;
865         default:
866                 sysfs_create_group(&ipl_subsys.kset.kobj,
867                                    &ipl_unknown_attr_group);
868                 break;
869         }
870         return 0;
871 }
872
873 __initcall(ipl_device_sysfs_register);