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);