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.
30 # define APM_DPRINTF(format, ...) printf(format, ## __VA_ARGS__)
32 # define APM_DPRINTF(format, ...) do { } while (0)
35 /* fixed I/O location */
36 #define APM_CNT_IOPORT 0xb2
37 #define APM_STS_IOPORT 0xb3
39 static void apm_ioport_writeb(void *opaque, hwaddr addr, uint64_t val,
42 APMState *apm = opaque;
44 APM_DPRINTF("apm_ioport_writeb addr=0x%x val=0x%02x\n", addr, val);
49 (apm->callback)(val, apm->arg);
56 static uint64_t apm_ioport_readb(void *opaque, hwaddr addr, unsigned size)
58 APMState *apm = opaque;
67 APM_DPRINTF("apm_ioport_readb addr=0x%x val=0x%02x\n", addr, val);
71 const VMStateDescription vmstate_apm = {
74 .minimum_version_id = 1,
75 .minimum_version_id_old = 1,
76 .fields = (VMStateField[]) {
77 VMSTATE_UINT8(apmc, APMState),
78 VMSTATE_UINT8(apms, APMState),
83 static const MemoryRegionOps apm_ops = {
84 .read = apm_ioport_readb,
85 .write = apm_ioport_writeb,
92 void apm_init(PCIDevice *dev, APMState *apm, apm_ctrl_changed_t callback,
95 apm->callback = callback;
98 /* ioport 0xb2, 0xb3 */
99 memory_region_init_io(&apm->io, &apm_ops, apm, "apm-io", 2);
100 memory_region_add_subregion(pci_address_space_io(dev), APM_CNT_IOPORT,