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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 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/>
*/
#include "apm.h"
#include "hw.h"
#include "isa.h"
//#define DEBUG
/* fixed I/O location */
#define APM_CNT_IOPORT 0xb2
#define APM_STS_IOPORT 0xb3
static void apm_ioport_writeb(void *opaque, uint32_t addr, uint32_t val)
{
APMState *apm = opaque;
addr &= 1;
#ifdef DEBUG
printf("apm_ioport_writeb addr=0x%x val=0x%02x\n", addr, val);
#endif
if (addr == 0) {
apm->apmc = val;
if (apm->callback) {
(apm->callback)(val, apm->arg);
}
} else {
apm->apms = val;
}
}
static uint32_t apm_ioport_readb(void *opaque, uint32_t addr)
{
APMState *apm = opaque;
uint32_t val;
addr &= 1;
if (addr == 0) {
val = apm->apmc;
} else {
val = apm->apms;
}
#ifdef DEBUG
printf("apm_ioport_readb addr=0x%x val=0x%02x\n", addr, val);
#endif
return val;
}
const VMStateDescription vmstate_apm = {
.name = "APM State",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT8(apmc, APMState),
VMSTATE_UINT8(apms, APMState),
VMSTATE_END_OF_LIST()
}
};
void apm_init(APMState *apm, apm_ctrl_changed_t callback, void *arg)
{
apm->callback = callback;
apm->arg = arg;
/* ioport 0xb2, 0xb3 */
register_ioport_write(APM_CNT_IOPORT, 2, 1, apm_ioport_writeb, apm);
register_ioport_read(APM_CNT_IOPORT, 2, 1, apm_ioport_readb, apm);
}
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