2 * arch/s390/kernel/setup.c
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)
9 * Derived from "arch/i386/kernel/setup.c"
10 * Copyright (C) 1995, Linus Torvalds
14 * This file handles the architecture-dependent parts of initialization
17 #include <linux/errno.h>
18 #include <linux/module.h>
19 #include <linux/sched.h>
20 #include <linux/kernel.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>
41 #include <asm/uaccess.h>
42 #include <asm/system.h>
44 #include <asm/mmu_context.h>
45 #include <asm/cpcmd.h>
46 #include <asm/lowcore.h>
49 #include <asm/ptrace.h>
50 #include <asm/sections.h>
55 unsigned int console_mode
= 0;
56 unsigned int console_devno
= -1;
57 unsigned int console_irq
= -1;
58 unsigned long memory_size
= 0;
59 unsigned long machine_flags
= 0;
61 unsigned long addr
, size
, type
;
62 } memory_chunk
[MEMORY_CHUNKS
] = { { 0 } };
63 #define CHUNK_READ_WRITE 0
64 #define CHUNK_READ_ONLY 1
65 volatile int __cpu_logical_map
[NR_CPUS
]; /* logical cpu to cpu address */
66 unsigned long __initdata zholes_size
[MAX_NR_ZONES
];
67 static unsigned long __initdata memory_end
;
70 * This is set up by the setup-routine at boot-time
71 * for S390 need to find out, what we have to setup
72 * using address 0x10400 ...
75 #include <asm/setup.h>
77 static struct resource code_resource
= {
78 .name
= "Kernel code",
79 .flags
= IORESOURCE_BUSY
| IORESOURCE_MEM
,
82 static struct resource data_resource
= {
83 .name
= "Kernel data",
84 .flags
= IORESOURCE_BUSY
| IORESOURCE_MEM
,
88 * cpu_init() initializes state that is per-CPU.
90 void __devinit
cpu_init (void)
92 int addr
= hard_smp_processor_id();
95 * Store processor id in lowcore (used e.g. in timer_interrupt)
97 asm volatile ("stidp %0": "=m" (S390_lowcore
.cpu_data
.cpu_id
));
98 S390_lowcore
.cpu_data
.cpu_addr
= addr
;
101 * Force FPU initialization:
103 clear_thread_flag(TIF_USEDFPU
);
106 atomic_inc(&init_mm
.mm_count
);
107 current
->active_mm
= &init_mm
;
110 enter_lazy_tlb(&init_mm
, current
);
114 * VM halt and poweroff setup routines
116 char vmhalt_cmd
[128] = "";
117 char vmpoff_cmd
[128] = "";
119 static inline void strncpy_skip_quote(char *dst
, char *src
, int n
)
124 for (sx
= 0; src
[sx
] != 0; sx
++) {
125 if (src
[sx
] == '"') continue;
131 static int __init
vmhalt_setup(char *str
)
133 strncpy_skip_quote(vmhalt_cmd
, str
, 127);
138 __setup("vmhalt=", vmhalt_setup
);
140 static int __init
vmpoff_setup(char *str
)
142 strncpy_skip_quote(vmpoff_cmd
, str
, 127);
147 __setup("vmpoff=", vmpoff_setup
);
150 * condev= and conmode= setup parameter.
153 static int __init
condev_setup(char *str
)
157 vdev
= simple_strtoul(str
, &str
, 0);
158 if (vdev
>= 0 && vdev
< 65536) {
159 console_devno
= vdev
;
165 __setup("condev=", condev_setup
);
167 static int __init
conmode_setup(char *str
)
169 #if defined(CONFIG_SCLP_CONSOLE)
170 if (strncmp(str
, "hwc", 4) == 0 || strncmp(str
, "sclp", 5) == 0)
173 #if defined(CONFIG_TN3215_CONSOLE)
174 if (strncmp(str
, "3215", 5) == 0)
177 #if defined(CONFIG_TN3270_CONSOLE)
178 if (strncmp(str
, "3270", 5) == 0)
184 __setup("conmode=", conmode_setup
);
186 static void __init
conmode_default(void)
188 char query_buffer
[1024];
192 __cpcmd("QUERY CONSOLE", query_buffer
, 1024, NULL
);
193 console_devno
= simple_strtoul(query_buffer
+ 5, NULL
, 16);
194 ptr
= strstr(query_buffer
, "SUBCHANNEL =");
195 console_irq
= simple_strtoul(ptr
+ 13, NULL
, 16);
196 __cpcmd("QUERY TERM", query_buffer
, 1024, NULL
);
197 ptr
= strstr(query_buffer
, "CONMODE");
199 * Set the conmode to 3215 so that the device recognition
200 * will set the cu_type of the console to 3215. If the
201 * conmode is 3270 and we don't set it back then both
202 * 3215 and the 3270 driver will try to access the console
203 * device (3215 as console and 3270 as normal tty).
205 __cpcmd("TERM CONMODE 3215", NULL
, 0, NULL
);
207 #if defined(CONFIG_SCLP_CONSOLE)
212 if (strncmp(ptr
+ 8, "3270", 4) == 0) {
213 #if defined(CONFIG_TN3270_CONSOLE)
215 #elif defined(CONFIG_TN3215_CONSOLE)
217 #elif defined(CONFIG_SCLP_CONSOLE)
220 } else if (strncmp(ptr
+ 8, "3215", 4) == 0) {
221 #if defined(CONFIG_TN3215_CONSOLE)
223 #elif defined(CONFIG_TN3270_CONSOLE)
225 #elif defined(CONFIG_SCLP_CONSOLE)
229 } else if (MACHINE_IS_P390
) {
230 #if defined(CONFIG_TN3215_CONSOLE)
232 #elif defined(CONFIG_TN3270_CONSOLE)
236 #if defined(CONFIG_SCLP_CONSOLE)
243 extern void machine_restart_smp(char *);
244 extern void machine_halt_smp(void);
245 extern void machine_power_off_smp(void);
247 void (*_machine_restart
)(char *command
) = machine_restart_smp
;
248 void (*_machine_halt
)(void) = machine_halt_smp
;
249 void (*_machine_power_off
)(void) = machine_power_off_smp
;
252 * Reboot, halt and power_off routines for non SMP.
254 extern void reipl(unsigned long devno
);
255 extern void reipl_diag(void);
256 static void do_machine_restart_nonsmp(char * __unused
)
261 cpcmd ("IPL", NULL
, 0, NULL
);
263 reipl (0x10000 | S390_lowcore
.ipl_device
);
266 static void do_machine_halt_nonsmp(void)
268 if (MACHINE_IS_VM
&& strlen(vmhalt_cmd
) > 0)
269 cpcmd(vmhalt_cmd
, NULL
, 0, NULL
);
270 signal_processor(smp_processor_id(), sigp_stop_and_store_status
);
273 static void do_machine_power_off_nonsmp(void)
275 if (MACHINE_IS_VM
&& strlen(vmpoff_cmd
) > 0)
276 cpcmd(vmpoff_cmd
, NULL
, 0, NULL
);
277 signal_processor(smp_processor_id(), sigp_stop_and_store_status
);
280 void (*_machine_restart
)(char *command
) = do_machine_restart_nonsmp
;
281 void (*_machine_halt
)(void) = do_machine_halt_nonsmp
;
282 void (*_machine_power_off
)(void) = do_machine_power_off_nonsmp
;
286 * Reboot, halt and power_off stubs. They just call _machine_restart,
287 * _machine_halt or _machine_power_off.
290 void machine_restart(char *command
)
292 if (!in_interrupt() || oops_in_progress
)
294 * Only unblank the console if we are called in enabled
295 * context or a bust_spinlocks cleared the way for us.
298 _machine_restart(command
);
301 void machine_halt(void)
303 if (!in_interrupt() || oops_in_progress
)
305 * Only unblank the console if we are called in enabled
306 * context or a bust_spinlocks cleared the way for us.
312 void machine_power_off(void)
314 if (!in_interrupt() || oops_in_progress
)
316 * Only unblank the console if we are called in enabled
317 * context or a bust_spinlocks cleared the way for us.
320 _machine_power_off();
324 * Dummy power off function.
326 void (*pm_power_off
)(void) = machine_power_off
;
329 add_memory_hole(unsigned long start
, unsigned long end
)
331 unsigned long dma_pfn
= MAX_DMA_ADDRESS
>> PAGE_SHIFT
;
334 zholes_size
[ZONE_DMA
] += end
- start
+ 1;
335 else if (start
> dma_pfn
)
336 zholes_size
[ZONE_NORMAL
] += end
- start
+ 1;
338 zholes_size
[ZONE_DMA
] += dma_pfn
- start
+ 1;
339 zholes_size
[ZONE_NORMAL
] += end
- dma_pfn
;
343 static int __init
early_parse_mem(char *p
)
345 memory_end
= memparse(p
, &p
);
348 early_param("mem", early_parse_mem
);
351 * "ipldelay=XXX[sm]" sets ipl delay in seconds or minutes
353 static int __init
early_parse_ipldelay(char *p
)
355 unsigned long delay
= 0;
357 delay
= simple_strtoul(p
, &p
, 0);
366 delay
*= 60 * 1000000;
369 /* now wait for the requested amount of time */
374 early_param("ipldelay", early_parse_ipldelay
);
383 * Setup lowcore for boot cpu
385 lc_pages
= sizeof(void *) == 8 ? 2 : 1;
386 lc
= (struct _lowcore
*)
387 __alloc_bootmem(lc_pages
* PAGE_SIZE
, lc_pages
* PAGE_SIZE
, 0);
388 memset(lc
, 0, lc_pages
* PAGE_SIZE
);
389 lc
->restart_psw
.mask
= PSW_BASE_BITS
| PSW_DEFAULT_KEY
;
390 lc
->restart_psw
.addr
=
391 PSW_ADDR_AMODE
| (unsigned long) restart_int_handler
;
392 lc
->external_new_psw
.mask
= PSW_KERNEL_BITS
;
393 lc
->external_new_psw
.addr
=
394 PSW_ADDR_AMODE
| (unsigned long) ext_int_handler
;
395 lc
->svc_new_psw
.mask
= PSW_KERNEL_BITS
| PSW_MASK_IO
| PSW_MASK_EXT
;
396 lc
->svc_new_psw
.addr
= PSW_ADDR_AMODE
| (unsigned long) system_call
;
397 lc
->program_new_psw
.mask
= PSW_KERNEL_BITS
;
398 lc
->program_new_psw
.addr
=
399 PSW_ADDR_AMODE
| (unsigned long)pgm_check_handler
;
400 lc
->mcck_new_psw
.mask
=
401 PSW_KERNEL_BITS
& ~PSW_MASK_MCHECK
& ~PSW_MASK_DAT
;
402 lc
->mcck_new_psw
.addr
=
403 PSW_ADDR_AMODE
| (unsigned long) mcck_int_handler
;
404 lc
->io_new_psw
.mask
= PSW_KERNEL_BITS
;
405 lc
->io_new_psw
.addr
= PSW_ADDR_AMODE
| (unsigned long) io_int_handler
;
406 lc
->ipl_device
= S390_lowcore
.ipl_device
;
407 lc
->jiffy_timer
= -1LL;
408 lc
->kernel_stack
= ((unsigned long) &init_thread_union
) + THREAD_SIZE
;
409 lc
->async_stack
= (unsigned long)
410 __alloc_bootmem(ASYNC_SIZE
, ASYNC_SIZE
, 0) + ASYNC_SIZE
;
411 lc
->panic_stack
= (unsigned long)
412 __alloc_bootmem(PAGE_SIZE
, PAGE_SIZE
, 0) + PAGE_SIZE
;
413 lc
->current_task
= (unsigned long) init_thread_union
.thread_info
.task
;
414 lc
->thread_info
= (unsigned long) &init_thread_union
;
416 if (MACHINE_HAS_IEEE
) {
417 lc
->extended_save_area_addr
= (__u32
)
418 __alloc_bootmem(PAGE_SIZE
, PAGE_SIZE
, 0);
419 /* enable extended save area */
423 set_prefix((u32
)(unsigned long) lc
);
427 setup_resources(void)
429 struct resource
*res
;
432 code_resource
.start
= (unsigned long) &_text
;
433 code_resource
.end
= (unsigned long) &_etext
- 1;
434 data_resource
.start
= (unsigned long) &_etext
;
435 data_resource
.end
= (unsigned long) &_edata
- 1;
437 for (i
= 0; i
< MEMORY_CHUNKS
&& memory_chunk
[i
].size
> 0; i
++) {
438 res
= alloc_bootmem_low(sizeof(struct resource
));
439 res
->flags
= IORESOURCE_BUSY
| IORESOURCE_MEM
;
440 switch (memory_chunk
[i
].type
) {
441 case CHUNK_READ_WRITE
:
442 res
->name
= "System RAM";
444 case CHUNK_READ_ONLY
:
445 res
->name
= "System ROM";
446 res
->flags
|= IORESOURCE_READONLY
;
449 res
->name
= "reserved";
451 res
->start
= memory_chunk
[i
].addr
;
452 res
->end
= memory_chunk
[i
].addr
+ memory_chunk
[i
].size
- 1;
453 request_resource(&iomem_resource
, res
);
454 request_resource(res
, &code_resource
);
455 request_resource(res
, &data_resource
);
462 unsigned long bootmap_size
;
463 unsigned long start_pfn
, end_pfn
, init_pfn
;
464 unsigned long last_rw_end
;
468 * partially used pages are not usable - thus
469 * we are rounding upwards:
471 start_pfn
= (__pa(&_end
) + PAGE_SIZE
- 1) >> PAGE_SHIFT
;
472 end_pfn
= max_pfn
= memory_end
>> PAGE_SHIFT
;
474 /* Initialize storage key for kernel pages */
475 for (init_pfn
= 0 ; init_pfn
< start_pfn
; init_pfn
++)
476 page_set_storage_key(init_pfn
<< PAGE_SHIFT
, PAGE_DEFAULT_KEY
);
479 * Initialize the boot-time allocator (with low memory only):
481 bootmap_size
= init_bootmem(start_pfn
, end_pfn
);
484 * Register RAM areas with the bootmem allocator.
486 last_rw_end
= start_pfn
;
488 for (i
= 0; i
< MEMORY_CHUNKS
&& memory_chunk
[i
].size
> 0; i
++) {
489 unsigned long start_chunk
, end_chunk
;
491 if (memory_chunk
[i
].type
!= CHUNK_READ_WRITE
)
493 start_chunk
= (memory_chunk
[i
].addr
+ PAGE_SIZE
- 1);
494 start_chunk
>>= PAGE_SHIFT
;
495 end_chunk
= (memory_chunk
[i
].addr
+ memory_chunk
[i
].size
);
496 end_chunk
>>= PAGE_SHIFT
;
497 if (start_chunk
< start_pfn
)
498 start_chunk
= start_pfn
;
499 if (end_chunk
> end_pfn
)
501 if (start_chunk
< end_chunk
) {
502 /* Initialize storage key for RAM pages */
503 for (init_pfn
= start_chunk
; init_pfn
< end_chunk
;
505 page_set_storage_key(init_pfn
<< PAGE_SHIFT
,
507 free_bootmem(start_chunk
<< PAGE_SHIFT
,
508 (end_chunk
- start_chunk
) << PAGE_SHIFT
);
509 if (last_rw_end
< start_chunk
)
510 add_memory_hole(last_rw_end
, start_chunk
- 1);
511 last_rw_end
= end_chunk
;
515 psw_set_key(PAGE_DEFAULT_KEY
);
517 if (last_rw_end
< end_pfn
- 1)
518 add_memory_hole(last_rw_end
, end_pfn
- 1);
521 * Reserve the bootmem bitmap itself as well. We do this in two
522 * steps (first step was init_bootmem()) because this catches
523 * the (very unlikely) case of us accidentally initializing the
524 * bootmem allocator with an invalid RAM area.
526 reserve_bootmem(start_pfn
<< PAGE_SHIFT
, bootmap_size
);
528 #ifdef CONFIG_BLK_DEV_INITRD
530 if (INITRD_START
+ INITRD_SIZE
<= memory_end
) {
531 reserve_bootmem(INITRD_START
, INITRD_SIZE
);
532 initrd_start
= INITRD_START
;
533 initrd_end
= initrd_start
+ INITRD_SIZE
;
535 printk("initrd extends beyond end of memory "
536 "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
537 initrd_start
+ INITRD_SIZE
, memory_end
);
538 initrd_start
= initrd_end
= 0;
545 * Setup function called from init/main.c just after the banner
550 setup_arch(char **cmdline_p
)
553 * print what head.S has found out about the machine
556 printk((MACHINE_IS_VM
) ?
557 "We are running under VM (31 bit mode)\n" :
558 "We are running native (31 bit mode)\n");
559 printk((MACHINE_HAS_IEEE
) ?
560 "This machine has an IEEE fpu\n" :
561 "This machine has no IEEE fpu\n");
562 #else /* CONFIG_64BIT */
563 printk((MACHINE_IS_VM
) ?
564 "We are running under VM (64 bit mode)\n" :
565 "We are running native (64 bit mode)\n");
566 #endif /* CONFIG_64BIT */
568 /* Save unparsed command line copy for /proc/cmdline */
569 strlcpy(saved_command_line
, COMMAND_LINE
, COMMAND_LINE_SIZE
);
571 *cmdline_p
= COMMAND_LINE
;
572 *(*cmdline_p
+ COMMAND_LINE_SIZE
- 1) = '\0';
574 ROOT_DEV
= Root_RAM0
;
576 init_mm
.start_code
= PAGE_OFFSET
;
577 init_mm
.end_code
= (unsigned long) &_etext
;
578 init_mm
.end_data
= (unsigned long) &_edata
;
579 init_mm
.brk
= (unsigned long) &_end
;
581 memory_end
= memory_size
;
586 memory_end
&= ~0x400000UL
;
589 * We need some free virtual space to be able to do vmalloc.
590 * On a machine with 2GB memory we make sure that we have at
591 * least 128 MB free space for vmalloc.
593 if (memory_end
> 1920*1024*1024)
594 memory_end
= 1920*1024*1024;
595 #else /* CONFIG_64BIT */
596 memory_end
&= ~0x200000UL
;
597 #endif /* CONFIG_64BIT */
604 __cpu_logical_map
[0] = S390_lowcore
.cpu_data
.cpu_addr
;
605 smp_setup_cpu_possible_map();
608 * Create kernel page tables and switch to virtual addressing.
612 /* Setup default console */
616 void print_cpu_info(struct cpuinfo_S390
*cpuinfo
)
622 "vers=%02X ident=%06X machine=%04X unused=%04X\n",
627 cpuinfo
->cpu_id
.version
,
628 cpuinfo
->cpu_id
.ident
,
629 cpuinfo
->cpu_id
.machine
,
630 cpuinfo
->cpu_id
.unused
);
634 * show_cpuinfo - Get information on one CPU for use by procfs.
637 static int show_cpuinfo(struct seq_file
*m
, void *v
)
639 struct cpuinfo_S390
*cpuinfo
;
640 unsigned long n
= (unsigned long) v
- 1;
644 seq_printf(m
, "vendor_id : IBM/S390\n"
645 "# processors : %i\n"
646 "bogomips per cpu: %lu.%02lu\n",
647 num_online_cpus(), loops_per_jiffy
/(500000/HZ
),
648 (loops_per_jiffy
/(5000/HZ
))%100);
652 if (smp_processor_id() == n
)
653 cpuinfo
= &S390_lowcore
.cpu_data
;
655 cpuinfo
= &lowcore_ptr
[n
]->cpu_data
;
657 cpuinfo
= &S390_lowcore
.cpu_data
;
659 seq_printf(m
, "processor %li: "
661 "identification = %06X, "
663 n
, cpuinfo
->cpu_id
.version
,
664 cpuinfo
->cpu_id
.ident
,
665 cpuinfo
->cpu_id
.machine
);
671 static void *c_start(struct seq_file
*m
, loff_t
*pos
)
673 return *pos
< NR_CPUS
? (void *)((unsigned long) *pos
+ 1) : NULL
;
675 static void *c_next(struct seq_file
*m
, void *v
, loff_t
*pos
)
678 return c_start(m
, pos
);
680 static void c_stop(struct seq_file
*m
, void *v
)
683 struct seq_operations cpuinfo_op
= {
687 .show
= show_cpuinfo
,
690 #define DEFINE_IPL_ATTR(_name, _format, _value) \
691 static ssize_t ipl_##_name##_show(struct subsystem *subsys, \
694 return sprintf(page, _format, _value); \
696 static struct subsys_attribute ipl_##_name##_attr = \
697 __ATTR(_name, S_IRUGO, ipl_##_name##_show, NULL);
699 DEFINE_IPL_ATTR(wwpn
, "0x%016llx\n", (unsigned long long)
700 IPL_PARMBLOCK_START
->fcp
.wwpn
);
701 DEFINE_IPL_ATTR(lun
, "0x%016llx\n", (unsigned long long)
702 IPL_PARMBLOCK_START
->fcp
.lun
);
703 DEFINE_IPL_ATTR(bootprog
, "%lld\n", (unsigned long long)
704 IPL_PARMBLOCK_START
->fcp
.bootprog
);
705 DEFINE_IPL_ATTR(br_lba
, "%lld\n", (unsigned long long)
706 IPL_PARMBLOCK_START
->fcp
.br_lba
);
714 static enum ipl_type_type
717 struct ipl_parameter_block
*ipl
= IPL_PARMBLOCK_START
;
719 if (!IPL_DEVNO_VALID
)
720 return ipl_type_unknown
;
721 if (!IPL_PARMBLOCK_VALID
)
723 if (ipl
->hdr
.header
.version
> IPL_MAX_SUPPORTED_VERSION
)
724 return ipl_type_unknown
;
725 if (ipl
->fcp
.pbt
!= IPL_TYPE_FCP
)
726 return ipl_type_unknown
;
731 ipl_type_show(struct subsystem
*subsys
, char *page
)
733 switch (get_ipl_type()) {
735 return sprintf(page
, "ccw\n");
737 return sprintf(page
, "fcp\n");
739 return sprintf(page
, "unknown\n");
743 static struct subsys_attribute ipl_type_attr
= __ATTR_RO(ipl_type
);
746 ipl_device_show(struct subsystem
*subsys
, char *page
)
748 struct ipl_parameter_block
*ipl
= IPL_PARMBLOCK_START
;
750 switch (get_ipl_type()) {
752 return sprintf(page
, "0.0.%04x\n", ipl_devno
);
754 return sprintf(page
, "0.0.%04x\n", ipl
->fcp
.devno
);
760 static struct subsys_attribute ipl_device_attr
=
761 __ATTR(device
, S_IRUGO
, ipl_device_show
, NULL
);
763 static struct attribute
*ipl_fcp_attrs
[] = {
765 &ipl_device_attr
.attr
,
768 &ipl_bootprog_attr
.attr
,
769 &ipl_br_lba_attr
.attr
,
773 static struct attribute_group ipl_fcp_attr_group
= {
774 .attrs
= ipl_fcp_attrs
,
777 static struct attribute
*ipl_ccw_attrs
[] = {
779 &ipl_device_attr
.attr
,
783 static struct attribute_group ipl_ccw_attr_group
= {
784 .attrs
= ipl_ccw_attrs
,
787 static struct attribute
*ipl_unknown_attrs
[] = {
792 static struct attribute_group ipl_unknown_attr_group
= {
793 .attrs
= ipl_unknown_attrs
,
797 ipl_parameter_read(struct kobject
*kobj
, char *buf
, loff_t off
, size_t count
)
799 unsigned int size
= IPL_PARMBLOCK_SIZE
;
803 if (off
+ count
> size
)
806 memcpy(buf
, (void *) IPL_PARMBLOCK_START
+ off
, count
);
810 static struct bin_attribute ipl_parameter_attr
= {
812 .name
= "binary_parameter",
814 .owner
= THIS_MODULE
,
817 .read
= &ipl_parameter_read
,
821 ipl_scp_data_read(struct kobject
*kobj
, char *buf
, loff_t off
, size_t count
)
823 unsigned int size
= IPL_PARMBLOCK_START
->fcp
.scp_data_len
;
824 void *scp_data
= &IPL_PARMBLOCK_START
->fcp
.scp_data
;
828 if (off
+ count
> size
)
831 memcpy(buf
, scp_data
+ off
, count
);
835 static struct bin_attribute ipl_scp_data_attr
= {
839 .owner
= THIS_MODULE
,
842 .read
= &ipl_scp_data_read
,
845 static decl_subsys(ipl
, NULL
, NULL
);
848 ipl_device_sysfs_register(void) {
851 rc
= firmware_register(&ipl_subsys
);
855 switch (get_ipl_type()) {
857 sysfs_create_group(&ipl_subsys
.kset
.kobj
, &ipl_ccw_attr_group
);
860 sysfs_create_group(&ipl_subsys
.kset
.kobj
, &ipl_fcp_attr_group
);
861 sysfs_create_bin_file(&ipl_subsys
.kset
.kobj
,
862 &ipl_parameter_attr
);
863 sysfs_create_bin_file(&ipl_subsys
.kset
.kobj
,
867 sysfs_create_group(&ipl_subsys
.kset
.kobj
,
868 &ipl_unknown_attr_group
);
874 __initcall(ipl_device_sysfs_register
);