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/*
* Clock migration structure
*
* Copyright GreenSocs 2019-2020
*
* Authors:
* Damien Hedde
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "migration/vmstate.h"
#include "hw/clock.h"
static bool muldiv_needed(void *opaque)
{
Clock *clk = opaque;
return clk->multiplier != 1 || clk->divider != 1;
}
static int clock_pre_load(void *opaque)
{
Clock *clk = opaque;
/*
* The initial out-of-reset settings of the Clock might have been
* configured by the device to be different from what we set
* in clock_initfn(), so we must here set the default values to
* be used if they are not in the inbound migration state.
*/
clk->multiplier = 1;
clk->divider = 1;
return 0;
}
const VMStateDescription vmstate_muldiv = {
.name = "clock/muldiv",
.version_id = 1,
.minimum_version_id = 1,
.needed = muldiv_needed,
.fields = (const VMStateField[]) {
VMSTATE_UINT32(multiplier, Clock),
VMSTATE_UINT32(divider, Clock),
VMSTATE_END_OF_LIST()
},
};
const VMStateDescription vmstate_clock = {
.name = "clock",
.version_id = 0,
.minimum_version_id = 0,
.pre_load = clock_pre_load,
.fields = (const VMStateField[]) {
VMSTATE_UINT64(period, Clock),
VMSTATE_END_OF_LIST()
},
.subsections = (const VMStateDescription * const []) {
&vmstate_muldiv,
NULL
},
};
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