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 "qemu/osdep.h" 24 #include "hw/isa/apm.h" 25 #include "hw/hw.h" 26 #include "hw/pci/pci.h" 27 28 //#define DEBUG 29 30 #ifdef DEBUG 31 # define APM_DPRINTF(format, ...) printf(format, ## __VA_ARGS__) 32 #else 33 # define APM_DPRINTF(format, ...) do { } while (0) 34 #endif 35 36 /* fixed I/O location */ 37 #define APM_CNT_IOPORT 0xb2 38 #define APM_STS_IOPORT 0xb3 39 40 static void apm_ioport_writeb(void *opaque, hwaddr addr, uint64_t val, 41 unsigned size) 42 { 43 APMState *apm = opaque; 44 addr &= 1; 45 APM_DPRINTF("apm_ioport_writeb addr=0x%" HWADDR_PRIx 46 " val=0x%02" PRIx64 "\n", addr, val); 47 if (addr == 0) { 48 apm->apmc = val; 49 50 if (apm->callback) { 51 (apm->callback)(val, apm->arg); 52 } 53 } else { 54 apm->apms = val; 55 } 56 } 57 58 static uint64_t apm_ioport_readb(void *opaque, hwaddr addr, unsigned size) 59 { 60 APMState *apm = opaque; 61 uint32_t val; 62 63 addr &= 1; 64 if (addr == 0) { 65 val = apm->apmc; 66 } else { 67 val = apm->apms; 68 } 69 APM_DPRINTF("apm_ioport_readb addr=0x%" HWADDR_PRIx " val=0x%02x\n", addr, val); 70 return val; 71 } 72 73 const VMStateDescription vmstate_apm = { 74 .name = "APM State", 75 .version_id = 1, 76 .minimum_version_id = 1, 77 .fields = (VMStateField[]) { 78 VMSTATE_UINT8(apmc, APMState), 79 VMSTATE_UINT8(apms, APMState), 80 VMSTATE_END_OF_LIST() 81 } 82 }; 83 84 static const MemoryRegionOps apm_ops = { 85 .read = apm_ioport_readb, 86 .write = apm_ioport_writeb, 87 .impl = { 88 .min_access_size = 1, 89 .max_access_size = 1, 90 }, 91 }; 92 93 void apm_init(PCIDevice *dev, APMState *apm, apm_ctrl_changed_t callback, 94 void *arg) 95 { 96 apm->callback = callback; 97 apm->arg = arg; 98 99 /* ioport 0xb2, 0xb3 */ 100 memory_region_init_io(&apm->io, OBJECT(dev), &apm_ops, apm, "apm-io", 2); 101 memory_region_add_subregion(pci_address_space_io(dev), APM_CNT_IOPORT, 102 &apm->io); 103 } 104