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>
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;
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
;
71 extern int _text
,_etext
, _edata
, _end
;
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 ...
79 #include <asm/setup.h>
81 static char command_line
[COMMAND_LINE_SIZE
] = { 0, };
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
,
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
,
98 * cpu_init() initializes state that is per-CPU.
100 void __devinit
cpu_init (void)
102 int addr
= hard_smp_processor_id();
105 * Store processor id in lowcore (used e.g. in timer_interrupt)
107 asm volatile ("stidp %0": "=m" (S390_lowcore
.cpu_data
.cpu_id
));
108 S390_lowcore
.cpu_data
.cpu_addr
= addr
;
111 * Force FPU initialization:
113 clear_thread_flag(TIF_USEDFPU
);
116 atomic_inc(&init_mm
.mm_count
);
117 current
->active_mm
= &init_mm
;
120 enter_lazy_tlb(&init_mm
, current
);
124 * VM halt and poweroff setup routines
126 char vmhalt_cmd
[128] = "";
127 char vmpoff_cmd
[128] = "";
129 static inline void strncpy_skip_quote(char *dst
, char *src
, int n
)
134 for (sx
= 0; src
[sx
] != 0; sx
++) {
135 if (src
[sx
] == '"') continue;
141 static int __init
vmhalt_setup(char *str
)
143 strncpy_skip_quote(vmhalt_cmd
, str
, 127);
148 __setup("vmhalt=", vmhalt_setup
);
150 static int __init
vmpoff_setup(char *str
)
152 strncpy_skip_quote(vmpoff_cmd
, str
, 127);
157 __setup("vmpoff=", vmpoff_setup
);
160 * condev= and conmode= setup parameter.
163 static int __init
condev_setup(char *str
)
167 vdev
= simple_strtoul(str
, &str
, 0);
168 if (vdev
>= 0 && vdev
< 65536) {
169 console_devno
= vdev
;
175 __setup("condev=", condev_setup
);
177 static int __init
conmode_setup(char *str
)
179 #if defined(CONFIG_SCLP_CONSOLE)
180 if (strncmp(str
, "hwc", 4) == 0 || strncmp(str
, "sclp", 5) == 0)
183 #if defined(CONFIG_TN3215_CONSOLE)
184 if (strncmp(str
, "3215", 5) == 0)
187 #if defined(CONFIG_TN3270_CONSOLE)
188 if (strncmp(str
, "3270", 5) == 0)
194 __setup("conmode=", conmode_setup
);
196 static void __init
conmode_default(void)
198 char query_buffer
[1024];
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");
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).
215 __cpcmd("TERM CONMODE 3215", NULL
, 0, NULL
);
217 #if defined(CONFIG_SCLP_CONSOLE)
222 if (strncmp(ptr
+ 8, "3270", 4) == 0) {
223 #if defined(CONFIG_TN3270_CONSOLE)
225 #elif defined(CONFIG_TN3215_CONSOLE)
227 #elif defined(CONFIG_SCLP_CONSOLE)
230 } else if (strncmp(ptr
+ 8, "3215", 4) == 0) {
231 #if defined(CONFIG_TN3215_CONSOLE)
233 #elif defined(CONFIG_TN3270_CONSOLE)
235 #elif defined(CONFIG_SCLP_CONSOLE)
239 } else if (MACHINE_IS_P390
) {
240 #if defined(CONFIG_TN3215_CONSOLE)
242 #elif defined(CONFIG_TN3270_CONSOLE)
246 #if defined(CONFIG_SCLP_CONSOLE)
253 extern void machine_restart_smp(char *);
254 extern void machine_halt_smp(void);
255 extern void machine_power_off_smp(void);
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
;
262 * Reboot, halt and power_off routines for non SMP.
264 extern void reipl(unsigned long devno
);
265 extern void reipl_diag(void);
266 static void do_machine_restart_nonsmp(char * __unused
)
271 cpcmd ("IPL", NULL
, 0);
273 reipl (0x10000 | S390_lowcore
.ipl_device
);
276 static void do_machine_halt_nonsmp(void)
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
);
283 static void do_machine_power_off_nonsmp(void)
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
);
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
;
296 * Reboot, halt and power_off stubs. They just call _machine_restart,
297 * _machine_halt or _machine_power_off.
300 void machine_restart(char *command
)
303 _machine_restart(command
);
306 void machine_halt(void)
312 void machine_power_off(void)
315 _machine_power_off();
319 add_memory_hole(unsigned long start
, unsigned long end
)
321 unsigned long dma_pfn
= MAX_DMA_ADDRESS
>> PAGE_SHIFT
;
324 zholes_size
[ZONE_DMA
] += end
- start
+ 1;
325 else if (start
> dma_pfn
)
326 zholes_size
[ZONE_NORMAL
] += end
- start
+ 1;
328 zholes_size
[ZONE_DMA
] += dma_pfn
- start
+ 1;
329 zholes_size
[ZONE_NORMAL
] += end
- dma_pfn
;
334 parse_cmdline_early(char **cmdline_p
)
336 char c
= ' ', cn
, *to
= command_line
, *from
= COMMAND_LINE
;
337 unsigned long delay
= 0;
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';
345 * "mem=XXX[kKmM]" sets memsize
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;
352 } else if ( *from
== 'M' || *from
== 'm' ) {
353 memory_end
= memory_end
<< 20;
358 * "ipldelay=XXX[sm]" sets ipl delay in seconds or minutes
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;
365 } else if (*from
== 'm' || *from
== 'M') {
366 delay
= delay
*60*1000000;
369 /* now wait for the requested amount of time */
376 cn
= ' '; /* replace newlines with space */
378 cn
= ' '; /* replace 0x0d with space */
379 if (cn
== ' ' && c
== ' ')
380 continue; /* remove additional spaces */
382 if (to
- command_line
>= COMMAND_LINE_SIZE
)
386 if (c
== ' ' && to
> command_line
) to
--;
388 *cmdline_p
= command_line
;
398 * Setup lowcore for boot cpu
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 */
438 set_prefix((u32
)(unsigned long) lc
);
442 setup_resources(void)
444 struct resource
*res
;
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";
454 case CHUNK_READ_ONLY
:
455 res
->name
= "System ROM";
456 res
->flags
|= IORESOURCE_READONLY
;
459 res
->name
= "reserved";
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
);
472 unsigned long bootmap_size
;
473 unsigned long start_pfn
, end_pfn
, init_pfn
;
474 unsigned long last_rw_end
;
478 * partially used pages are not usable - thus
479 * we are rounding upwards:
481 start_pfn
= (__pa(&_end
) + PAGE_SIZE
- 1) >> PAGE_SHIFT
;
482 end_pfn
= max_pfn
= memory_end
>> PAGE_SHIFT
;
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
);
489 * Initialize the boot-time allocator (with low memory only):
491 bootmap_size
= init_bootmem(start_pfn
, end_pfn
);
494 * Register RAM areas with the bootmem allocator.
496 last_rw_end
= start_pfn
;
498 for (i
= 0; i
< MEMORY_CHUNKS
&& memory_chunk
[i
].size
> 0; i
++) {
499 unsigned long start_chunk
, end_chunk
;
501 if (memory_chunk
[i
].type
!= CHUNK_READ_WRITE
)
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
)
511 if (start_chunk
< end_chunk
) {
512 /* Initialize storage key for RAM pages */
513 for (init_pfn
= start_chunk
; init_pfn
< end_chunk
;
515 page_set_storage_key(init_pfn
<< PAGE_SHIFT
,
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
;
525 psw_set_key(PAGE_DEFAULT_KEY
);
527 if (last_rw_end
< end_pfn
- 1)
528 add_memory_hole(last_rw_end
, end_pfn
- 1);
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.
536 reserve_bootmem(start_pfn
<< PAGE_SHIFT
, bootmap_size
);
538 #ifdef CONFIG_BLK_DEV_INITRD
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
;
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;
555 * Setup function called from init/main.c just after the banner
560 setup_arch(char **cmdline_p
)
563 * print what head.S has found out about the machine
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 */
578 ROOT_DEV
= Root_RAM0
;
579 #ifndef CONFIG_ARCH_S390X
580 memory_end
= memory_size
& ~0x400000UL
; /* align memory end to 4MB */
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.
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 */
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
;
597 parse_cmdline_early(cmdline_p
);
604 __cpu_logical_map
[0] = S390_lowcore
.cpu_data
.cpu_addr
;
607 * Create kernel page tables and switch to virtual addressing.
611 /* Setup default console */
615 void print_cpu_info(struct cpuinfo_S390
*cpuinfo
)
621 "vers=%02X ident=%06X machine=%04X unused=%04X\n",
626 cpuinfo
->cpu_id
.version
,
627 cpuinfo
->cpu_id
.ident
,
628 cpuinfo
->cpu_id
.machine
,
629 cpuinfo
->cpu_id
.unused
);
633 * show_cpuinfo - Get information on one CPU for use by procfs.
636 static int show_cpuinfo(struct seq_file
*m
, void *v
)
638 struct cpuinfo_S390
*cpuinfo
;
639 unsigned long n
= (unsigned long) v
- 1;
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);
651 if (smp_processor_id() == n
)
652 cpuinfo
= &S390_lowcore
.cpu_data
;
654 cpuinfo
= &lowcore_ptr
[n
]->cpu_data
;
656 cpuinfo
= &S390_lowcore
.cpu_data
;
658 seq_printf(m
, "processor %li: "
660 "identification = %06X, "
662 n
, cpuinfo
->cpu_id
.version
,
663 cpuinfo
->cpu_id
.ident
,
664 cpuinfo
->cpu_id
.machine
);
670 static void *c_start(struct seq_file
*m
, loff_t
*pos
)
672 return *pos
< NR_CPUS
? (void *)((unsigned long) *pos
+ 1) : NULL
;
674 static void *c_next(struct seq_file
*m
, void *v
, loff_t
*pos
)
677 return c_start(m
, pos
);
679 static void c_stop(struct seq_file
*m
, void *v
)
682 struct seq_operations cpuinfo_op
= {
686 .show
= show_cpuinfo
,
689 #define DEFINE_IPL_ATTR(_name, _format, _value) \
690 static ssize_t ipl_##_name##_show(struct subsystem *subsys, \
693 return sprintf(page, _format, _value); \
695 static struct subsys_attribute ipl_##_name##_attr = \
696 __ATTR(_name, S_IRUGO, ipl_##_name##_show, NULL);
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
);
713 static enum ipl_type_type
716 struct ipl_parameter_block
*ipl
= IPL_PARMBLOCK_START
;
718 if (!IPL_DEVNO_VALID
)
719 return ipl_type_unknown
;
720 if (!IPL_PARMBLOCK_VALID
)
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
;
730 ipl_type_show(struct subsystem
*subsys
, char *page
)
732 switch (get_ipl_type()) {
734 return sprintf(page
, "ccw\n");
736 return sprintf(page
, "fcp\n");
738 return sprintf(page
, "unknown\n");
742 static struct subsys_attribute ipl_type_attr
= __ATTR_RO(ipl_type
);
745 ipl_device_show(struct subsystem
*subsys
, char *page
)
747 struct ipl_parameter_block
*ipl
= IPL_PARMBLOCK_START
;
749 switch (get_ipl_type()) {
751 return sprintf(page
, "0.0.%04x\n", ipl_devno
);
753 return sprintf(page
, "0.0.%04x\n", ipl
->fcp
.devno
);
759 static struct subsys_attribute ipl_device_attr
=
760 __ATTR(device
, S_IRUGO
, ipl_device_show
, NULL
);
762 static struct attribute
*ipl_fcp_attrs
[] = {
764 &ipl_device_attr
.attr
,
767 &ipl_bootprog_attr
.attr
,
768 &ipl_br_lba_attr
.attr
,
772 static struct attribute_group ipl_fcp_attr_group
= {
773 .attrs
= ipl_fcp_attrs
,
776 static struct attribute
*ipl_ccw_attrs
[] = {
778 &ipl_device_attr
.attr
,
782 static struct attribute_group ipl_ccw_attr_group
= {
783 .attrs
= ipl_ccw_attrs
,
786 static struct attribute
*ipl_unknown_attrs
[] = {
791 static struct attribute_group ipl_unknown_attr_group
= {
792 .attrs
= ipl_unknown_attrs
,
796 ipl_parameter_read(struct kobject
*kobj
, char *buf
, loff_t off
, size_t count
)
798 unsigned int size
= IPL_PARMBLOCK_SIZE
;
802 if (off
+ count
> size
)
805 memcpy(buf
, (void *) IPL_PARMBLOCK_START
+ off
, count
);
809 static struct bin_attribute ipl_parameter_attr
= {
811 .name
= "binary_parameter",
813 .owner
= THIS_MODULE
,
816 .read
= &ipl_parameter_read
,
820 ipl_scp_data_read(struct kobject
*kobj
, char *buf
, loff_t off
, size_t count
)
822 unsigned int size
= IPL_PARMBLOCK_START
->fcp
.scp_data_len
;
823 void *scp_data
= &IPL_PARMBLOCK_START
->fcp
.scp_data
;
827 if (off
+ count
> size
)
830 memcpy(buf
, scp_data
+ off
, count
);
834 static struct bin_attribute ipl_scp_data_attr
= {
838 .owner
= THIS_MODULE
,
841 .read
= &ipl_scp_data_read
,
844 static decl_subsys(ipl
, NULL
, NULL
);
847 ipl_device_sysfs_register(void) {
850 rc
= firmware_register(&ipl_subsys
);
854 switch (get_ipl_type()) {
856 sysfs_create_group(&ipl_subsys
.kset
.kobj
, &ipl_ccw_attr_group
);
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
,
866 sysfs_create_group(&ipl_subsys
.kset
.kobj
,
867 &ipl_unknown_attr_group
);
873 __initcall(ipl_device_sysfs_register
);