qemu

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/*
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 * QEMU simulated pvpanic device.
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 *
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 * Copyright Fujitsu, Corp. 2013
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 *
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 * Authors:
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 *     Wen Congyang <wency@cn.fujitsu.com>
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 *     Hu Tao <hutao@cn.fujitsu.com>
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 *
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 * This work is licensed under the terms of the GNU GPL, version 2 or later.
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 * See the COPYING file in the top-level directory.
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 *
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 */
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#include "qemu/osdep.h"
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#include "qemu/log.h"
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#include "qemu/module.h"
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#include "sysemu/runstate.h"
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#include "hw/nvram/fw_cfg.h"
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#include "hw/qdev-properties.h"
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#include "hw/misc/pvpanic.h"
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#include "qom/object.h"
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#include "standard-headers/misc/pvpanic.h"
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static void handle_event(int event)
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{
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    static bool logged;
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    if (event & ~PVPANIC_EVENTS && !logged) {
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        qemu_log_mask(LOG_GUEST_ERROR, "pvpanic: unknown event %#x.\n", event);
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        logged = true;
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    }
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    if (event & PVPANIC_PANICKED) {
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        qemu_system_guest_panicked(NULL);
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        return;
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    }
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    if (event & PVPANIC_CRASH_LOADED) {
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        qemu_system_guest_crashloaded(NULL);
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        return;
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    }
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    if (event & PVPANIC_SHUTDOWN) {
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        qemu_system_guest_pvshutdown();
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        return;
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    }
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}
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/* return supported events on read */
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static uint64_t pvpanic_read(void *opaque, hwaddr addr, unsigned size)
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{
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    PVPanicState *pvp = opaque;
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    return pvp->events;
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}
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static void pvpanic_write(void *opaque, hwaddr addr, uint64_t val,
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                                 unsigned size)
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{
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    handle_event(val);
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}
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static const MemoryRegionOps pvpanic_ops = {
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    .read = pvpanic_read,
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    .write = pvpanic_write,
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    .impl = {
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        .min_access_size = 1,
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        .max_access_size = 1,
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    },
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};
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void pvpanic_setup_io(PVPanicState *s, DeviceState *dev, unsigned size)
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{
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    memory_region_init_io(&s->mr, OBJECT(dev), &pvpanic_ops, s, "pvpanic", size);
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}
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