hw/arm/raspi: fix CPRMAN base address
[qemu.git] / hw / isa / apm.c
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/pci/pci.h"
26 #include "migration/vmstate.h"
27 #include "trace.h"
28
29
30 /* fixed I/O location */
31 #define APM_STS_IOPORT 0xb3
32
33 static void apm_ioport_writeb(void *opaque, hwaddr addr, uint64_t val,
34 unsigned size)
35 {
36 APMState *apm = opaque;
37 addr &= 1;
38
39 trace_apm_io_write(addr, val);
40 if (addr == 0) {
41 apm->apmc = val;
42
43 if (apm->callback) {
44 (apm->callback)(val, apm->arg);
45 }
46 } else {
47 apm->apms = val;
48 }
49 }
50
51 static uint64_t apm_ioport_readb(void *opaque, hwaddr addr, unsigned size)
52 {
53 APMState *apm = opaque;
54 uint32_t val;
55
56 addr &= 1;
57 if (addr == 0) {
58 val = apm->apmc;
59 } else {
60 val = apm->apms;
61 }
62 trace_apm_io_read(addr, val);
63
64 return val;
65 }
66
67 const VMStateDescription vmstate_apm = {
68 .name = "APM State",
69 .version_id = 1,
70 .minimum_version_id = 1,
71 .fields = (VMStateField[]) {
72 VMSTATE_UINT8(apmc, APMState),
73 VMSTATE_UINT8(apms, APMState),
74 VMSTATE_END_OF_LIST()
75 }
76 };
77
78 static const MemoryRegionOps apm_ops = {
79 .read = apm_ioport_readb,
80 .write = apm_ioport_writeb,
81 .impl = {
82 .min_access_size = 1,
83 .max_access_size = 1,
84 },
85 };
86
87 void apm_init(PCIDevice *dev, APMState *apm, apm_ctrl_changed_t callback,
88 void *arg)
89 {
90 apm->callback = callback;
91 apm->arg = arg;
92
93 /* ioport 0xb2, 0xb3 */
94 memory_region_init_io(&apm->io, OBJECT(dev), &apm_ops, apm, "apm-io", 2);
95 memory_region_add_subregion(pci_address_space_io(dev), APM_CNT_IOPORT,
96 &apm->io);
97 }