/* * 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" //#define DEBUG #ifdef DEBUG # define APM_DPRINTF(format, ...) printf(format, ## __VA_ARGS__) #else # define APM_DPRINTF(format, ...) do { } while (0) #endif /* 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; APM_DPRINTF("apm_ioport_writeb addr=0x%x val=0x%02x\n", addr, val); 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; } APM_DPRINTF("apm_ioport_readb addr=0x%x val=0x%02x\n", addr, val); 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); }