target/ppc: Fix slbia TLB invalidation gap
[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
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_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%" HWADDR_PRIx
45 " val=0x%02" PRIx64 "\n", addr, val);
46 if (addr == 0) {
47 apm->apmc = val;
48
49 if (apm->callback) {
50 (apm->callback)(val, apm->arg);
51 }
52 } else {
53 apm->apms = val;
54 }
55 }
56
57 static uint64_t apm_ioport_readb(void *opaque, hwaddr addr, unsigned size)
58 {
59 APMState *apm = opaque;
60 uint32_t val;
61
62 addr &= 1;
63 if (addr == 0) {
64 val = apm->apmc;
65 } else {
66 val = apm->apms;
67 }
68 APM_DPRINTF("apm_ioport_readb addr=0x%" HWADDR_PRIx " val=0x%02x\n", addr, val);
69 return val;
70 }
71
72 const VMStateDescription vmstate_apm = {
73 .name = "APM State",
74 .version_id = 1,
75 .minimum_version_id = 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 }