53 lines
1.3 KiB
C
53 lines
1.3 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* signal quiesce handler
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*
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* Copyright IBM Corp. 1999, 2004
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* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
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* Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
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*/
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#include <linux/types.h>
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#include <linux/cpumask.h>
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#include <linux/smp.h>
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#include <linux/init.h>
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#include <linux/reboot.h>
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#include <linux/atomic.h>
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#include <asm/ptrace.h>
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#include <asm/smp.h>
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#include "sclp.h"
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/* Shutdown handler. Signal completion of shutdown by loading special PSW. */
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static void do_machine_quiesce(void)
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{
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psw_t quiesce_psw;
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smp_send_stop();
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quiesce_psw.mask =
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PSW_MASK_BASE | PSW_MASK_EA | PSW_MASK_BA | PSW_MASK_WAIT;
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quiesce_psw.addr = 0xfff;
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__load_psw(quiesce_psw);
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}
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/* Handler for quiesce event. Start shutdown procedure. */
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static void sclp_quiesce_handler(struct evbuf_header *evbuf)
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{
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_machine_restart = (void *) do_machine_quiesce;
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_machine_halt = do_machine_quiesce;
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_machine_power_off = do_machine_quiesce;
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ctrl_alt_del();
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}
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static struct sclp_register sclp_quiesce_event = {
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.receive_mask = EVTYP_SIGQUIESCE_MASK,
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.receiver_fn = sclp_quiesce_handler,
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};
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/* Initialize quiesce driver. */
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static int __init sclp_quiesce_init(void)
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{
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return sclp_register(&sclp_quiesce_event);
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}
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device_initcall(sclp_quiesce_init);
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