1 /* 2 * QEMU PC APM controller Emulation 3 * This is split out from acpi.c 4 * 5 * Copyright (c) 2006 Fabrice Bellard 6 * 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. 10 * 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. 15 * 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/> 18 * 19 * Contributions after 2012-01-13 are licensed under the terms of the 20 * GNU GPL, version 2 or (at your option) any later version. 21 */ 22 23 #include "hw/isa/apm.h" 24 #include "hw/hw.h" 25 #include "hw/pci/pci.h" 26 27 //#define DEBUG 28 29 #ifdef DEBUG 30 # define APM_DPRINTF(format, ...) printf(format, ## __VA_ARGS__) 31 #else 32 # define APM_DPRINTF(format, ...) do { } while (0) 33 #endif 34 35 /* fixed I/O location */ 36 #define APM_CNT_IOPORT 0xb2 37 #define APM_STS_IOPORT 0xb3 38 39 static void apm_ioport_writeb(void *opaque, hwaddr addr, uint64_t val, 40 unsigned size) 41 { 42 APMState *apm = opaque; 43 addr &= 1; 44 APM_DPRINTF("apm_ioport_writeb addr=0x%x val=0x%02x\n", addr, val); 45 if (addr == 0) { 46 apm->apmc = val; 47 48 if (apm->callback) { 49 (apm->callback)(val, apm->arg); 50 } 51 } else { 52 apm->apms = val; 53 } 54 } 55 56 static uint64_t apm_ioport_readb(void *opaque, hwaddr addr, unsigned size) 57 { 58 APMState *apm = opaque; 59 uint32_t val; 60 61 addr &= 1; 62 if (addr == 0) { 63 val = apm->apmc; 64 } else { 65 val = apm->apms; 66 } 67 APM_DPRINTF("apm_ioport_readb addr=0x%x val=0x%02x\n", addr, val); 68 return val; 69 } 70 71 const VMStateDescription vmstate_apm = { 72 .name = "APM State", 73 .version_id = 1, 74 .minimum_version_id = 1, 75 .minimum_version_id_old = 1, 76 .fields = (VMStateField[]) { 77 VMSTATE_UINT8(apmc, APMState), 78 VMSTATE_UINT8(apms, APMState), 79 VMSTATE_END_OF_LIST() 80 } 81 }; 82 83 static const MemoryRegionOps apm_ops = { 84 .read = apm_ioport_readb, 85 .write = apm_ioport_writeb, 86 .impl = { 87 .min_access_size = 1, 88 .max_access_size = 1, 89 }, 90 }; 91 92 void apm_init(PCIDevice *dev, APMState *apm, apm_ctrl_changed_t callback, 93 void *arg) 94 { 95 apm->callback = callback; 96 apm->arg = arg; 97 98 /* ioport 0xb2, 0xb3 */ 99 memory_region_init_io(&apm->io, OBJECT(dev), &apm_ops, apm, "apm-io", 2); 100 memory_region_add_subregion(pci_address_space_io(dev), APM_CNT_IOPORT, 101 &apm->io); 102 } 103