projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * drivers/s390/char/sclp_quiesce.c | |
| 3 | * signal quiesce handler | |
| 4 | * | |
| 5 | * (C) Copyright IBM Corp. 1999,2004 | |
| 6 | * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com> | |
| 7 | * Peter Oberparleiter <peter.oberparleiter@de.ibm.com> | |
| 8 | */ | |
| 9 | ||
| 1da177e4 LT |
10 | #include <linux/module.h> |
| 11 | #include <linux/types.h> | |
| 12 | #include <linux/cpumask.h> | |
| 13 | #include <linux/smp.h> | |
| 14 | #include <linux/init.h> | |
| 83cc5ed3 | 15 | #include <linux/reboot.h> |
| 1da177e4 LT |
16 | #include <asm/atomic.h> |
| 17 | #include <asm/ptrace.h> | |
| 18 | #include <asm/sigp.h> | |
| 188596fa | 19 | #include <asm/smp.h> |
| 1da177e4 LT |
20 | |
| 21 | #include "sclp.h" | |
| 22 | ||
| 1da177e4 LT |
23 | /* Shutdown handler. Signal completion of shutdown by loading special PSW. */ |
| 24 | static void | |
| 25 | do_machine_quiesce(void) | |
| 26 | { | |
| 27 | psw_t quiesce_psw; | |
| 28 | ||
| c6b5b847 | 29 | smp_send_stop(); |
| 1da177e4 LT |
30 | quiesce_psw.mask = PSW_BASE_BITS | PSW_MASK_WAIT; |
| 31 | quiesce_psw.addr = 0xfff; | |
| 32 | __load_psw(quiesce_psw); | |
| 33 | } | |
| 1da177e4 | 34 | |
| 1da177e4 LT |
35 | /* Handler for quiesce event. Start shutdown procedure. */ |
| 36 | static void | |
| 37 | sclp_quiesce_handler(struct evbuf_header *evbuf) | |
| 38 | { | |
| 39 | _machine_restart = (void *) do_machine_quiesce; | |
| 40 | _machine_halt = do_machine_quiesce; | |
| 41 | _machine_power_off = do_machine_quiesce; | |
| 42 | ctrl_alt_del(); | |
| 43 | } | |
| 44 | ||
| 45 | static struct sclp_register sclp_quiesce_event = { | |
| 46 | .receive_mask = EvTyp_SigQuiesce_Mask, | |
| 47 | .receiver_fn = sclp_quiesce_handler | |
| 48 | }; | |
| 49 | ||
| 50 | /* Initialize quiesce driver. */ | |
| 51 | static int __init | |
| 52 | sclp_quiesce_init(void) | |
| 53 | { | |
| 54 | int rc; | |
| 55 | ||
| 56 | rc = sclp_register(&sclp_quiesce_event); | |
| 57 | if (rc) | |
| 58 | printk(KERN_WARNING "sclp: could not register quiesce handler " | |
| 59 | "(rc=%d)\n", rc); | |
| 60 | return rc; | |
| 61 | } | |
| 62 | ||
| 63 | module_init(sclp_quiesce_init); |