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/*
* QEMU PC APM controller Emulation
* This is split out from acpi.c
*
* Copyright (c) 2006 Fabrice Bellard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>
*
* Contributions after 2012-01-13 are licensed under the terms of the
* GNU GPL, version 2 or (at your option) any later version.
*/
#include "qemu/osdep.h"
#include "hw/isa/apm.h"
#include "hw/pci/pci.h"
#include "migration/vmstate.h"
#include "trace.h"
/* fixed I/O location */
#define APM_STS_IOPORT 0xb3
static void apm_ioport_writeb(void *opaque, hwaddr addr, uint64_t val,
unsigned size)
{
APMState *apm = opaque;
addr &= 1;
trace_apm_io_write(addr, val);
if (addr == 0) {
apm->apmc = val;
if (apm->callback) {
(apm->callback)(val, apm->arg);
}
} else {
apm->apms = val;
}
}
static uint64_t apm_ioport_readb(void *opaque, hwaddr addr, unsigned size)
{
APMState *apm = opaque;
uint32_t val;
addr &= 1;
if (addr == 0) {
val = apm->apmc;
} else {
val = apm->apms;
}
trace_apm_io_read(addr, val);
return val;
}
const VMStateDescription vmstate_apm = {
.name = "APM State",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT8(apmc, APMState),
VMSTATE_UINT8(apms, APMState),
VMSTATE_END_OF_LIST()
}
};
static const MemoryRegionOps apm_ops = {
.read = apm_ioport_readb,
.write = apm_ioport_writeb,
.impl = {
.min_access_size = 1,
.max_access_size = 1,
},
};
void apm_init(PCIDevice *dev, APMState *apm, apm_ctrl_changed_t callback,
void *arg)
{
apm->callback = callback;
apm->arg = arg;
/* ioport 0xb2, 0xb3 */
memory_region_init_io(&apm->io, OBJECT(dev), &apm_ops, apm, "apm-io", 2);
memory_region_add_subregion(pci_address_space_io(dev), APM_CNT_IOPORT,
&apm->io);
}
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