/* * 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/> * * Contributions after 2012-01-13 are licensed under the terms of the * GNU GPL, version 2 or (at your option) any later version. */ #include "hw/apm.h" #include "hw/hw.h" #include "hw/pci/pci.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, hwaddr addr, uint64_t val, unsigned size) { 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 uint64_t apm_ioport_readb(void *opaque, hwaddr addr, unsigned size) { 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() } }; static const MemoryRegionOps apm_ops = { .read = apm_ioport_readb, .write = apm_ioport_writeb, .impl = { .min_access_size = 1, .max_access_size = 1, }, }; void apm_init(PCIDevice *dev, APMState *apm, apm_ctrl_changed_t callback, void *arg) { apm->callback = callback; apm->arg = arg; /* ioport 0xb2, 0xb3 */ memory_region_init_io(&apm->io, &apm_ops, apm, "apm-io", 2); memory_region_add_subregion(pci_address_space_io(dev), APM_CNT_IOPORT, &apm->io); }