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/>
26
# define APM_DPRINTF(format, ...) printf(format, ## __VA_ARGS__)
28
# define APM_DPRINTF(format, ...) do { } while (0)
31
/* fixed I/O location */
32
#define APM_CNT_IOPORT 0xb2
33
#define APM_STS_IOPORT 0xb3
35
static void apm_ioport_writeb(void *opaque, uint32_t addr, uint32_t val)
37
APMState *apm = opaque;
39
APM_DPRINTF("apm_ioport_writeb addr=0x%x val=0x%02x\n", addr, val);
44
(apm->callback)(val, apm->arg);
51
static uint32_t apm_ioport_readb(void *opaque, uint32_t addr)
53
APMState *apm = opaque;
62
APM_DPRINTF("apm_ioport_readb addr=0x%x val=0x%02x\n", addr, val);
66
const VMStateDescription vmstate_apm = {
69
.minimum_version_id = 1,
70
.minimum_version_id_old = 1,
71
.fields = (VMStateField[]) {
72
VMSTATE_UINT8(apmc, APMState),
73
VMSTATE_UINT8(apms, APMState),
78
void apm_init(APMState *apm, apm_ctrl_changed_t callback, void *arg)
80
apm->callback = callback;
83
/* ioport 0xb2, 0xb3 */
84
register_ioport_write(APM_CNT_IOPORT, 2, 1, apm_ioport_writeb, apm);
85
register_ioport_read(APM_CNT_IOPORT, 2, 1, apm_ioport_readb, apm);