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