2 * arch/s390/kernel/ipl.c
3 * ipl/reipl/dump support for Linux on s390.
5 * Copyright (C) IBM Corp. 2005,2006
6 * Author(s): Michael Holzheu <holzheu@de.ibm.com>
7 * Heiko Carstens <heiko.carstens@de.ibm.com>
8 * Volker Sameske <sameske@de.ibm.com>
11 #include <linux/types.h>
12 #include <linux/module.h>
13 #include <linux/device.h>
14 #include <linux/delay.h>
15 #include <linux/reboot.h>
16 #include <linux/ctype.h>
18 #include <asm/setup.h>
19 #include <asm/cpcmd.h>
21 #include <asm/ebcdic.h>
22 #include <asm/reset.h>
24 #define IPL_PARM_BLOCK_VERSION 0
25 #define LOADPARM_LEN 8
27 extern char s390_readinfo_sccb[];
28 #define SCCB_VALID (*((__u16*)&s390_readinfo_sccb[6]) == 0x0010)
29 #define SCCB_LOADPARM (&s390_readinfo_sccb[24])
30 #define SCCB_FLAG (s390_readinfo_sccb[91])
39 #define IPL_NONE_STR "none"
40 #define IPL_UNKNOWN_STR "unknown"
41 #define IPL_CCW_STR "ccw"
42 #define IPL_FCP_STR "fcp"
44 static char *ipl_type_str(enum ipl_type type)
53 case IPL_TYPE_UNKNOWN:
55 return IPL_UNKNOWN_STR;
64 IPL_METHOD_FCP_RO_DIAG,
65 IPL_METHOD_FCP_RW_DIAG,
69 enum shutdown_action {
75 #define SHUTDOWN_REIPL_STR "reipl"
76 #define SHUTDOWN_DUMP_STR "dump"
77 #define SHUTDOWN_STOP_STR "stop"
79 static char *shutdown_action_str(enum shutdown_action action)
83 return SHUTDOWN_REIPL_STR;
85 return SHUTDOWN_DUMP_STR;
87 return SHUTDOWN_STOP_STR;
93 enum diag308_subcode {
100 enum diag308_ipl_type {
101 DIAG308_IPL_TYPE_FCP = 0,
102 DIAG308_IPL_TYPE_CCW = 2,
106 DIAG308_IPL_OPT_IPL = 0x10,
107 DIAG308_IPL_OPT_DUMP = 0x20,
114 static int diag308_set_works = 0;
116 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
117 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
118 static enum ipl_method reipl_method = IPL_METHOD_NONE;
119 static struct ipl_parameter_block *reipl_block_fcp;
120 static struct ipl_parameter_block *reipl_block_ccw;
122 static int dump_capabilities = IPL_TYPE_NONE;
123 static enum ipl_type dump_type = IPL_TYPE_NONE;
124 static enum ipl_method dump_method = IPL_METHOD_NONE;
125 static struct ipl_parameter_block *dump_block_fcp;
126 static struct ipl_parameter_block *dump_block_ccw;
128 static enum shutdown_action on_panic_action = SHUTDOWN_STOP;
130 static int diag308(unsigned long subcode, void *addr)
132 register unsigned long _addr asm("0") = (unsigned long) addr;
133 register unsigned long _rc asm("1") = 0;
136 " diag %0,%2,0x308\n"
139 : "+d" (_addr), "+d" (_rc)
140 : "d" (subcode) : "cc", "memory");
146 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
147 static ssize_t sys_##_prefix##_##_name##_show(struct subsystem *subsys, \
150 return sprintf(page, _format, _value); \
152 static struct subsys_attribute sys_##_prefix##_##_name##_attr = \
153 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL);
155 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
156 static ssize_t sys_##_prefix##_##_name##_show(struct subsystem *subsys, \
159 return sprintf(page, _fmt_out, \
160 (unsigned long long) _value); \
162 static ssize_t sys_##_prefix##_##_name##_store(struct subsystem *subsys,\
163 const char *buf, size_t len) \
165 unsigned long long value; \
166 if (sscanf(buf, _fmt_in, &value) != 1) \
171 static struct subsys_attribute sys_##_prefix##_##_name##_attr = \
172 __ATTR(_name,(S_IRUGO | S_IWUSR), \
173 sys_##_prefix##_##_name##_show, \
174 sys_##_prefix##_##_name##_store);
176 static void make_attrs_ro(struct attribute **attrs)
179 (*attrs)->mode = S_IRUGO;
188 static enum ipl_type ipl_get_type(void)
190 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
192 if (!(ipl_flags & IPL_DEVNO_VALID))
193 return IPL_TYPE_UNKNOWN;
194 if (!(ipl_flags & IPL_PARMBLOCK_VALID))
196 if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
197 return IPL_TYPE_UNKNOWN;
198 if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
199 return IPL_TYPE_UNKNOWN;
203 static ssize_t ipl_type_show(struct subsystem *subsys, char *page)
205 return sprintf(page, "%s\n", ipl_type_str(ipl_get_type()));
208 static struct subsys_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
210 static ssize_t sys_ipl_device_show(struct subsystem *subsys, char *page)
212 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
214 switch (ipl_get_type()) {
216 return sprintf(page, "0.0.%04x\n", ipl_devno);
218 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
224 static struct subsys_attribute sys_ipl_device_attr =
225 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
227 static ssize_t ipl_parameter_read(struct kobject *kobj, char *buf, loff_t off,
230 unsigned int size = IPL_PARMBLOCK_SIZE;
234 if (off + count > size)
236 memcpy(buf, (void *)IPL_PARMBLOCK_START + off, count);
240 static struct bin_attribute ipl_parameter_attr = {
242 .name = "binary_parameter",
244 .owner = THIS_MODULE,
247 .read = &ipl_parameter_read,
250 static ssize_t ipl_scp_data_read(struct kobject *kobj, char *buf, loff_t off,
253 unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
254 void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
258 if (off + count > size)
260 memcpy(buf, scp_data + off, count);
264 static struct bin_attribute ipl_scp_data_attr = {
268 .owner = THIS_MODULE,
271 .read = &ipl_scp_data_read,
274 /* FCP ipl device attributes */
276 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
277 IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
278 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
279 IPL_PARMBLOCK_START->ipl_info.fcp.lun);
280 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
281 IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
282 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
283 IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
285 static struct attribute *ipl_fcp_attrs[] = {
286 &sys_ipl_type_attr.attr,
287 &sys_ipl_device_attr.attr,
288 &sys_ipl_fcp_wwpn_attr.attr,
289 &sys_ipl_fcp_lun_attr.attr,
290 &sys_ipl_fcp_bootprog_attr.attr,
291 &sys_ipl_fcp_br_lba_attr.attr,
295 static struct attribute_group ipl_fcp_attr_group = {
296 .attrs = ipl_fcp_attrs,
299 /* CCW ipl device attributes */
301 static ssize_t ipl_ccw_loadparm_show(struct subsystem *subsys, char *page)
303 char loadparm[LOADPARM_LEN + 1] = {};
306 return sprintf(page, "#unknown#\n");
307 memcpy(loadparm, SCCB_LOADPARM, LOADPARM_LEN);
308 EBCASC(loadparm, LOADPARM_LEN);
310 return sprintf(page, "%s\n", loadparm);
313 static struct subsys_attribute sys_ipl_ccw_loadparm_attr =
314 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
316 static struct attribute *ipl_ccw_attrs[] = {
317 &sys_ipl_type_attr.attr,
318 &sys_ipl_device_attr.attr,
319 &sys_ipl_ccw_loadparm_attr.attr,
323 static struct attribute_group ipl_ccw_attr_group = {
324 .attrs = ipl_ccw_attrs,
327 /* UNKNOWN ipl device attributes */
329 static struct attribute *ipl_unknown_attrs[] = {
330 &sys_ipl_type_attr.attr,
334 static struct attribute_group ipl_unknown_attr_group = {
335 .attrs = ipl_unknown_attrs,
338 static decl_subsys(ipl, NULL, NULL);
344 /* FCP reipl device attributes */
346 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
347 reipl_block_fcp->ipl_info.fcp.wwpn);
348 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n",
349 reipl_block_fcp->ipl_info.fcp.lun);
350 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
351 reipl_block_fcp->ipl_info.fcp.bootprog);
352 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
353 reipl_block_fcp->ipl_info.fcp.br_lba);
354 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
355 reipl_block_fcp->ipl_info.fcp.devno);
357 static struct attribute *reipl_fcp_attrs[] = {
358 &sys_reipl_fcp_device_attr.attr,
359 &sys_reipl_fcp_wwpn_attr.attr,
360 &sys_reipl_fcp_lun_attr.attr,
361 &sys_reipl_fcp_bootprog_attr.attr,
362 &sys_reipl_fcp_br_lba_attr.attr,
366 static struct attribute_group reipl_fcp_attr_group = {
368 .attrs = reipl_fcp_attrs,
371 /* CCW reipl device attributes */
373 DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
374 reipl_block_ccw->ipl_info.ccw.devno);
376 static void reipl_get_ascii_loadparm(char *loadparm)
378 memcpy(loadparm, &reipl_block_ccw->ipl_info.ccw.load_param,
380 EBCASC(loadparm, LOADPARM_LEN);
381 loadparm[LOADPARM_LEN] = 0;
385 static ssize_t reipl_ccw_loadparm_show(struct subsystem *subsys, char *page)
387 char buf[LOADPARM_LEN + 1];
389 reipl_get_ascii_loadparm(buf);
390 return sprintf(page, "%s\n", buf);
393 static ssize_t reipl_ccw_loadparm_store(struct subsystem *subsys,
394 const char *buf, size_t len)
398 /* ignore trailing newline */
400 if ((len > 0) && (buf[len - 1] == '\n'))
402 /* loadparm can have max 8 characters and must not start with a blank */
403 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
405 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
406 for (i = 0; i < lp_len; i++) {
407 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
412 /* initialize loadparm with blanks */
413 memset(&reipl_block_ccw->ipl_info.ccw.load_param, ' ', LOADPARM_LEN);
414 /* copy and convert to ebcdic */
415 memcpy(&reipl_block_ccw->ipl_info.ccw.load_param, buf, lp_len);
416 ASCEBC(reipl_block_ccw->ipl_info.ccw.load_param, LOADPARM_LEN);
420 static struct subsys_attribute sys_reipl_ccw_loadparm_attr =
421 __ATTR(loadparm, 0644, reipl_ccw_loadparm_show,
422 reipl_ccw_loadparm_store);
424 static struct attribute *reipl_ccw_attrs[] = {
425 &sys_reipl_ccw_device_attr.attr,
426 &sys_reipl_ccw_loadparm_attr.attr,
430 static struct attribute_group reipl_ccw_attr_group = {
432 .attrs = reipl_ccw_attrs,
437 static int reipl_set_type(enum ipl_type type)
439 if (!(reipl_capabilities & type))
445 reipl_method = IPL_METHOD_CCW_VM;
447 reipl_method = IPL_METHOD_CCW_CIO;
450 if (diag308_set_works)
451 reipl_method = IPL_METHOD_FCP_RW_DIAG;
452 else if (MACHINE_IS_VM)
453 reipl_method = IPL_METHOD_FCP_RO_VM;
455 reipl_method = IPL_METHOD_FCP_RO_DIAG;
458 reipl_method = IPL_METHOD_NONE;
464 static ssize_t reipl_type_show(struct subsystem *subsys, char *page)
466 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
469 static ssize_t reipl_type_store(struct subsystem *subsys, const char *buf,
474 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
475 rc = reipl_set_type(IPL_TYPE_CCW);
476 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
477 rc = reipl_set_type(IPL_TYPE_FCP);
478 return (rc != 0) ? rc : len;
481 static struct subsys_attribute reipl_type_attr =
482 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
484 static decl_subsys(reipl, NULL, NULL);
490 /* FCP dump device attributes */
492 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
493 dump_block_fcp->ipl_info.fcp.wwpn);
494 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n",
495 dump_block_fcp->ipl_info.fcp.lun);
496 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
497 dump_block_fcp->ipl_info.fcp.bootprog);
498 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
499 dump_block_fcp->ipl_info.fcp.br_lba);
500 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
501 dump_block_fcp->ipl_info.fcp.devno);
503 static struct attribute *dump_fcp_attrs[] = {
504 &sys_dump_fcp_device_attr.attr,
505 &sys_dump_fcp_wwpn_attr.attr,
506 &sys_dump_fcp_lun_attr.attr,
507 &sys_dump_fcp_bootprog_attr.attr,
508 &sys_dump_fcp_br_lba_attr.attr,
512 static struct attribute_group dump_fcp_attr_group = {
514 .attrs = dump_fcp_attrs,
517 /* CCW dump device attributes */
519 DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
520 dump_block_ccw->ipl_info.ccw.devno);
522 static struct attribute *dump_ccw_attrs[] = {
523 &sys_dump_ccw_device_attr.attr,
527 static struct attribute_group dump_ccw_attr_group = {
529 .attrs = dump_ccw_attrs,
534 static int dump_set_type(enum ipl_type type)
536 if (!(dump_capabilities & type))
541 dump_method = IPL_METHOD_CCW_VM;
543 dump_method = IPL_METHOD_CCW_CIO;
546 dump_method = IPL_METHOD_FCP_RW_DIAG;
549 dump_method = IPL_METHOD_NONE;
555 static ssize_t dump_type_show(struct subsystem *subsys, char *page)
557 return sprintf(page, "%s\n", ipl_type_str(dump_type));
560 static ssize_t dump_type_store(struct subsystem *subsys, const char *buf,
565 if (strncmp(buf, IPL_NONE_STR, strlen(IPL_NONE_STR)) == 0)
566 rc = dump_set_type(IPL_TYPE_NONE);
567 else if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
568 rc = dump_set_type(IPL_TYPE_CCW);
569 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
570 rc = dump_set_type(IPL_TYPE_FCP);
571 return (rc != 0) ? rc : len;
574 static struct subsys_attribute dump_type_attr =
575 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
577 static decl_subsys(dump, NULL, NULL);
580 static void dump_smp_stop_all(void)
584 for_each_online_cpu(cpu) {
585 if (cpu == smp_processor_id())
587 while (signal_processor(cpu, sigp_stop) == sigp_busy)
593 #define dump_smp_stop_all() do { } while (0)
597 * Shutdown actions section
600 static decl_subsys(shutdown_actions, NULL, NULL);
604 static ssize_t on_panic_show(struct subsystem *subsys, char *page)
606 return sprintf(page, "%s\n", shutdown_action_str(on_panic_action));
609 static ssize_t on_panic_store(struct subsystem *subsys, const char *buf,
612 if (strncmp(buf, SHUTDOWN_REIPL_STR, strlen(SHUTDOWN_REIPL_STR)) == 0)
613 on_panic_action = SHUTDOWN_REIPL;
614 else if (strncmp(buf, SHUTDOWN_DUMP_STR,
615 strlen(SHUTDOWN_DUMP_STR)) == 0)
616 on_panic_action = SHUTDOWN_DUMP;
617 else if (strncmp(buf, SHUTDOWN_STOP_STR,
618 strlen(SHUTDOWN_STOP_STR)) == 0)
619 on_panic_action = SHUTDOWN_STOP;
626 static struct subsys_attribute on_panic_attr =
627 __ATTR(on_panic, 0644, on_panic_show, on_panic_store);
629 static void print_fcp_block(struct ipl_parameter_block *fcp_block)
631 printk(KERN_EMERG "wwpn: %016llx\n",
632 (unsigned long long)fcp_block->ipl_info.fcp.wwpn);
633 printk(KERN_EMERG "lun: %016llx\n",
634 (unsigned long long)fcp_block->ipl_info.fcp.lun);
635 printk(KERN_EMERG "bootprog: %lld\n",
636 (unsigned long long)fcp_block->ipl_info.fcp.bootprog);
637 printk(KERN_EMERG "br_lba: %lld\n",
638 (unsigned long long)fcp_block->ipl_info.fcp.br_lba);
639 printk(KERN_EMERG "device: %llx\n",
640 (unsigned long long)fcp_block->ipl_info.fcp.devno);
641 printk(KERN_EMERG "opt: %x\n", fcp_block->ipl_info.fcp.opt);
646 struct ccw_dev_id devid;
647 static char buf[100];
648 char loadparm[LOADPARM_LEN + 1];
650 switch (reipl_type) {
652 reipl_get_ascii_loadparm(loadparm);
653 printk(KERN_EMERG "reboot on ccw device: 0.0.%04x\n",
654 reipl_block_ccw->ipl_info.ccw.devno);
655 printk(KERN_EMERG "loadparm = '%s'\n", loadparm);
658 printk(KERN_EMERG "reboot on fcp device:\n");
659 print_fcp_block(reipl_block_fcp);
665 switch (reipl_method) {
666 case IPL_METHOD_CCW_CIO:
667 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
668 if (ipl_get_type() == IPL_TYPE_CCW && devid.devno == ipl_devno)
669 diag308(DIAG308_IPL, NULL);
671 reipl_ccw_dev(&devid);
673 case IPL_METHOD_CCW_VM:
674 if (strlen(loadparm) == 0)
675 sprintf(buf, "IPL %X",
676 reipl_block_ccw->ipl_info.ccw.devno);
678 sprintf(buf, "IPL %X LOADPARM '%s'",
679 reipl_block_ccw->ipl_info.ccw.devno, loadparm);
680 __cpcmd(buf, NULL, 0, NULL);
682 case IPL_METHOD_CCW_DIAG:
683 diag308(DIAG308_SET, reipl_block_ccw);
684 diag308(DIAG308_IPL, NULL);
686 case IPL_METHOD_FCP_RW_DIAG:
687 diag308(DIAG308_SET, reipl_block_fcp);
688 diag308(DIAG308_IPL, NULL);
690 case IPL_METHOD_FCP_RO_DIAG:
691 diag308(DIAG308_IPL, NULL);
693 case IPL_METHOD_FCP_RO_VM:
694 __cpcmd("IPL", NULL, 0, NULL);
696 case IPL_METHOD_NONE:
699 __cpcmd("IPL", NULL, 0, NULL);
700 diag308(DIAG308_IPL, NULL);
703 printk(KERN_EMERG "reboot failed!\n");
704 signal_processor(smp_processor_id(), sigp_stop_and_store_status);
707 static void do_dump(void)
709 struct ccw_dev_id devid;
710 static char buf[100];
714 printk(KERN_EMERG "Automatic dump on ccw device: 0.0.%04x\n",
715 dump_block_ccw->ipl_info.ccw.devno);
718 printk(KERN_EMERG "Automatic dump on fcp device:\n");
719 print_fcp_block(dump_block_fcp);
725 switch (dump_method) {
726 case IPL_METHOD_CCW_CIO:
728 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
730 reipl_ccw_dev(&devid);
732 case IPL_METHOD_CCW_VM:
734 sprintf(buf, "STORE STATUS");
735 __cpcmd(buf, NULL, 0, NULL);
736 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
737 __cpcmd(buf, NULL, 0, NULL);
739 case IPL_METHOD_CCW_DIAG:
740 diag308(DIAG308_SET, dump_block_ccw);
741 diag308(DIAG308_DUMP, NULL);
743 case IPL_METHOD_FCP_RW_DIAG:
744 diag308(DIAG308_SET, dump_block_fcp);
745 diag308(DIAG308_DUMP, NULL);
747 case IPL_METHOD_NONE:
751 printk(KERN_EMERG "Dump failed!\n");
756 static int __init ipl_register_fcp_files(void)
760 rc = sysfs_create_group(&ipl_subsys.kset.kobj,
761 &ipl_fcp_attr_group);
764 rc = sysfs_create_bin_file(&ipl_subsys.kset.kobj,
765 &ipl_parameter_attr);
768 rc = sysfs_create_bin_file(&ipl_subsys.kset.kobj,
773 sysfs_remove_bin_file(&ipl_subsys.kset.kobj, &ipl_parameter_attr);
776 sysfs_remove_group(&ipl_subsys.kset.kobj, &ipl_fcp_attr_group);
781 static int __init ipl_init(void)
785 rc = firmware_register(&ipl_subsys);
788 switch (ipl_get_type()) {
790 rc = sysfs_create_group(&ipl_subsys.kset.kobj,
791 &ipl_ccw_attr_group);
794 rc = ipl_register_fcp_files();
797 rc = sysfs_create_group(&ipl_subsys.kset.kobj,
798 &ipl_unknown_attr_group);
802 firmware_unregister(&ipl_subsys);
806 static void __init reipl_probe(void)
810 buffer = (void *) get_zeroed_page(GFP_KERNEL);
813 if (diag308(DIAG308_STORE, buffer) == DIAG308_RC_OK)
814 diag308_set_works = 1;
815 free_page((unsigned long)buffer);
818 static int __init reipl_ccw_init(void)
822 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
823 if (!reipl_block_ccw)
825 rc = sysfs_create_group(&reipl_subsys.kset.kobj, &reipl_ccw_attr_group);
827 free_page((unsigned long)reipl_block_ccw);
830 reipl_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
831 reipl_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
832 reipl_block_ccw->hdr.blk0_len = sizeof(reipl_block_ccw->ipl_info.ccw);
833 reipl_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
834 /* check if read scp info worked and set loadparm */
836 memcpy(reipl_block_ccw->ipl_info.ccw.load_param,
837 SCCB_LOADPARM, LOADPARM_LEN);
839 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
840 memset(reipl_block_ccw->ipl_info.ccw.load_param, 0x40,
842 /* FIXME: check for diag308_set_works when enabling diag ccw reipl */
844 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
845 if (ipl_get_type() == IPL_TYPE_CCW)
846 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
847 reipl_capabilities |= IPL_TYPE_CCW;
851 static int __init reipl_fcp_init(void)
855 if ((!diag308_set_works) && (ipl_get_type() != IPL_TYPE_FCP))
857 if ((!diag308_set_works) && (ipl_get_type() == IPL_TYPE_FCP))
858 make_attrs_ro(reipl_fcp_attrs);
860 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
861 if (!reipl_block_fcp)
863 rc = sysfs_create_group(&reipl_subsys.kset.kobj, &reipl_fcp_attr_group);
865 free_page((unsigned long)reipl_block_fcp);
868 if (ipl_get_type() == IPL_TYPE_FCP) {
869 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
871 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
872 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
873 reipl_block_fcp->hdr.blk0_len =
874 sizeof(reipl_block_fcp->ipl_info.fcp);
875 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
876 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
878 reipl_capabilities |= IPL_TYPE_FCP;
882 static int __init reipl_init(void)
886 rc = firmware_register(&reipl_subsys);
889 rc = subsys_create_file(&reipl_subsys, &reipl_type_attr);
891 firmware_unregister(&reipl_subsys);
894 rc = reipl_ccw_init();
897 rc = reipl_fcp_init();
900 rc = reipl_set_type(ipl_get_type());
906 static int __init dump_ccw_init(void)
910 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
913 rc = sysfs_create_group(&dump_subsys.kset.kobj, &dump_ccw_attr_group);
915 free_page((unsigned long)dump_block_ccw);
918 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
919 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
920 dump_block_ccw->hdr.blk0_len = sizeof(reipl_block_ccw->ipl_info.ccw);
921 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
922 dump_capabilities |= IPL_TYPE_CCW;
926 static int __init dump_fcp_init(void)
930 if(!(SCCB_FLAG & 0x2) || !SCCB_VALID)
931 return 0; /* LDIPL DUMP is not installed */
932 if (!diag308_set_works)
934 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
937 rc = sysfs_create_group(&dump_subsys.kset.kobj, &dump_fcp_attr_group);
939 free_page((unsigned long)dump_block_fcp);
942 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
943 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
944 dump_block_fcp->hdr.blk0_len = sizeof(dump_block_fcp->ipl_info.fcp);
945 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
946 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
947 dump_capabilities |= IPL_TYPE_FCP;
951 #define SHUTDOWN_ON_PANIC_PRIO 0
953 static int shutdown_on_panic_notify(struct notifier_block *self,
954 unsigned long event, void *data)
956 if (on_panic_action == SHUTDOWN_DUMP)
958 else if (on_panic_action == SHUTDOWN_REIPL)
963 static struct notifier_block shutdown_on_panic_nb = {
964 .notifier_call = shutdown_on_panic_notify,
965 .priority = SHUTDOWN_ON_PANIC_PRIO
968 static int __init dump_init(void)
972 rc = firmware_register(&dump_subsys);
975 rc = subsys_create_file(&dump_subsys, &dump_type_attr);
977 firmware_unregister(&dump_subsys);
980 rc = dump_ccw_init();
983 rc = dump_fcp_init();
986 dump_set_type(IPL_TYPE_NONE);
990 static int __init shutdown_actions_init(void)
994 rc = firmware_register(&shutdown_actions_subsys);
997 rc = subsys_create_file(&shutdown_actions_subsys, &on_panic_attr);
999 firmware_unregister(&shutdown_actions_subsys);
1002 atomic_notifier_chain_register(&panic_notifier_list,
1003 &shutdown_on_panic_nb);
1007 static int __init s390_ipl_init(void)
1021 rc = shutdown_actions_init();
1027 __initcall(s390_ipl_init);
1029 static LIST_HEAD(rcall);
1030 static DEFINE_MUTEX(rcall_mutex);
1032 void register_reset_call(struct reset_call *reset)
1034 mutex_lock(&rcall_mutex);
1035 list_add(&reset->list, &rcall);
1036 mutex_unlock(&rcall_mutex);
1038 EXPORT_SYMBOL_GPL(register_reset_call);
1040 void unregister_reset_call(struct reset_call *reset)
1042 mutex_lock(&rcall_mutex);
1043 list_del(&reset->list);
1044 mutex_unlock(&rcall_mutex);
1046 EXPORT_SYMBOL_GPL(unregister_reset_call);
1048 static void do_reset_calls(void)
1050 struct reset_call *reset;
1052 list_for_each_entry(reset, &rcall, list)
1056 extern void reset_mcck_handler(void);
1058 void s390_reset_system(void)
1060 struct _lowcore *lc;
1062 /* Disable all interrupts/machine checks */
1063 __load_psw_mask(PSW_KERNEL_BITS & ~PSW_MASK_MCHECK);
1065 /* Stack for interrupt/machine check handler */
1066 lc = (struct _lowcore *)(unsigned long) store_prefix();
1067 lc->panic_stack = S390_lowcore.panic_stack;
1069 /* Disable prefixing */
1072 /* Disable lowcore protection */
1073 __ctl_clear_bit(0,28);
1075 /* Set new machine check handler */
1076 S390_lowcore.mcck_new_psw.mask = PSW_KERNEL_BITS & ~PSW_MASK_MCHECK;
1077 S390_lowcore.mcck_new_psw.addr =
1078 PSW_ADDR_AMODE | (unsigned long) &reset_mcck_handler;