2 * QEMU PC APM controller Emulation
3 * This is split out from acpi.c
5 * Copyright (c) 2006 Fabrice Bellard
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License version 2 as published by the Free Software Foundation.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>
19 * Contributions after 2012-01-13 are licensed under the terms of the
20 * GNU GPL, version 2 or (at your option) any later version.
23 #include "qemu/osdep.h"
24 #include "hw/isa/apm.h"
25 #include "hw/pci/pci.h"
26 #include "migration/vmstate.h"
30 /* fixed I/O location */
31 #define APM_STS_IOPORT 0xb3
33 static void apm_ioport_writeb(void *opaque, hwaddr addr, uint64_t val,
36 APMState *apm = opaque;
39 trace_apm_io_write(addr, val);
44 (apm->callback)(val, apm->arg);
51 static uint64_t apm_ioport_readb(void *opaque, hwaddr addr, unsigned size)
53 APMState *apm = opaque;
62 trace_apm_io_read(addr, val);
67 const VMStateDescription vmstate_apm = {
70 .minimum_version_id = 1,
71 .fields = (VMStateField[]) {
72 VMSTATE_UINT8(apmc, APMState),
73 VMSTATE_UINT8(apms, APMState),
78 static const MemoryRegionOps apm_ops = {
79 .read = apm_ioport_readb,
80 .write = apm_ioport_writeb,
87 void apm_init(PCIDevice *dev, APMState *apm, apm_ctrl_changed_t callback,
90 apm->callback = callback;
93 /* ioport 0xb2, 0xb3 */
94 memory_region_init_io(&apm->io, OBJECT(dev), &apm_ops, apm, "apm-io", 2);
95 memory_region_add_subregion(pci_address_space_io(dev), APM_CNT_IOPORT,