meson: convert hw/vfio
[qemu.git] / hw / ppc / spapr_rtc.c
1 /*
2 * QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator
3 *
4 * RTAS Real Time Clock
5 *
6 * Copyright (c) 2010-2011 David Gibson, IBM Corporation.
7 * Copyright 2014 David Gibson, Red Hat.
8 *
9 * Permission is hereby granted, free of charge, to any person obtaining a copy
10 * of this software and associated documentation files (the "Software"), to deal
11 * in the Software without restriction, including without limitation the rights
12 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
13 * copies of the Software, and to permit persons to whom the Software is
14 * furnished to do so, subject to the following conditions:
15 *
16 * The above copyright notice and this permission notice shall be included in
17 * all copies or substantial portions of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
24 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
25 * THE SOFTWARE.
26 */
27
28 #include "qemu/osdep.h"
29 #include "qemu-common.h"
30 #include "cpu.h"
31 #include "qemu/timer.h"
32 #include "sysemu/sysemu.h"
33 #include "hw/ppc/spapr.h"
34 #include "migration/vmstate.h"
35 #include "qapi/error.h"
36 #include "qapi/qapi-events-misc-target.h"
37 #include "qemu/cutils.h"
38 #include "qemu/module.h"
39
40 void spapr_rtc_read(SpaprRtcState *rtc, struct tm *tm, uint32_t *ns)
41 {
42 int64_t host_ns = qemu_clock_get_ns(rtc_clock);
43 int64_t guest_ns;
44 time_t guest_s;
45
46 assert(rtc);
47
48 guest_ns = host_ns + rtc->ns_offset;
49 guest_s = guest_ns / NANOSECONDS_PER_SECOND;
50
51 if (tm) {
52 gmtime_r(&guest_s, tm);
53 }
54 if (ns) {
55 *ns = guest_ns;
56 }
57 }
58
59 int spapr_rtc_import_offset(SpaprRtcState *rtc, int64_t legacy_offset)
60 {
61 if (!rtc) {
62 return -ENODEV;
63 }
64
65 rtc->ns_offset = legacy_offset * NANOSECONDS_PER_SECOND;
66
67 return 0;
68 }
69
70 static void rtas_get_time_of_day(PowerPCCPU *cpu, SpaprMachineState *spapr,
71 uint32_t token, uint32_t nargs,
72 target_ulong args,
73 uint32_t nret, target_ulong rets)
74 {
75 struct tm tm;
76 uint32_t ns;
77
78 if ((nargs != 0) || (nret != 8)) {
79 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
80 return;
81 }
82
83 spapr_rtc_read(&spapr->rtc, &tm, &ns);
84
85 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
86 rtas_st(rets, 1, tm.tm_year + 1900);
87 rtas_st(rets, 2, tm.tm_mon + 1);
88 rtas_st(rets, 3, tm.tm_mday);
89 rtas_st(rets, 4, tm.tm_hour);
90 rtas_st(rets, 5, tm.tm_min);
91 rtas_st(rets, 6, tm.tm_sec);
92 rtas_st(rets, 7, ns);
93 }
94
95 static void rtas_set_time_of_day(PowerPCCPU *cpu, SpaprMachineState *spapr,
96 uint32_t token, uint32_t nargs,
97 target_ulong args,
98 uint32_t nret, target_ulong rets)
99 {
100 SpaprRtcState *rtc = &spapr->rtc;
101 struct tm tm;
102 time_t new_s;
103 int64_t host_ns;
104
105 if ((nargs != 7) || (nret != 1)) {
106 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
107 return;
108 }
109
110 tm.tm_year = rtas_ld(args, 0) - 1900;
111 tm.tm_mon = rtas_ld(args, 1) - 1;
112 tm.tm_mday = rtas_ld(args, 2);
113 tm.tm_hour = rtas_ld(args, 3);
114 tm.tm_min = rtas_ld(args, 4);
115 tm.tm_sec = rtas_ld(args, 5);
116
117 new_s = mktimegm(&tm);
118 if (new_s == -1) {
119 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
120 return;
121 }
122
123 /* Generate a monitor event for the change */
124 qapi_event_send_rtc_change(qemu_timedate_diff(&tm));
125
126 host_ns = qemu_clock_get_ns(rtc_clock);
127
128 rtc->ns_offset = (new_s * NANOSECONDS_PER_SECOND) - host_ns;
129
130 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
131 }
132
133 static void spapr_rtc_qom_date(Object *obj, struct tm *current_tm, Error **errp)
134 {
135 spapr_rtc_read(SPAPR_RTC(obj), current_tm, NULL);
136 }
137
138 static void spapr_rtc_realize(DeviceState *dev, Error **errp)
139 {
140 SpaprRtcState *rtc = SPAPR_RTC(dev);
141 struct tm tm;
142 time_t host_s;
143 int64_t rtc_ns;
144
145 /* Initialize the RTAS RTC from host time */
146
147 qemu_get_timedate(&tm, 0);
148 host_s = mktimegm(&tm);
149 rtc_ns = qemu_clock_get_ns(rtc_clock);
150 rtc->ns_offset = host_s * NANOSECONDS_PER_SECOND - rtc_ns;
151
152 object_property_add_tm(OBJECT(rtc), "date", spapr_rtc_qom_date);
153 }
154
155 static const VMStateDescription vmstate_spapr_rtc = {
156 .name = "spapr/rtc",
157 .version_id = 1,
158 .minimum_version_id = 1,
159 .fields = (VMStateField[]) {
160 VMSTATE_INT64(ns_offset, SpaprRtcState),
161 VMSTATE_END_OF_LIST()
162 },
163 };
164
165 static void spapr_rtc_class_init(ObjectClass *oc, void *data)
166 {
167 DeviceClass *dc = DEVICE_CLASS(oc);
168
169 dc->realize = spapr_rtc_realize;
170 dc->vmsd = &vmstate_spapr_rtc;
171 /* Reason: This is an internal device only for handling the hypercalls */
172 dc->user_creatable = false;
173
174 spapr_rtas_register(RTAS_GET_TIME_OF_DAY, "get-time-of-day",
175 rtas_get_time_of_day);
176 spapr_rtas_register(RTAS_SET_TIME_OF_DAY, "set-time-of-day",
177 rtas_set_time_of_day);
178 }
179
180 static const TypeInfo spapr_rtc_info = {
181 .name = TYPE_SPAPR_RTC,
182 .parent = TYPE_DEVICE,
183 .instance_size = sizeof(SpaprRtcState),
184 .class_init = spapr_rtc_class_init,
185 };
186
187 static void spapr_rtc_register_types(void)
188 {
189 type_register_static(&spapr_rtc_info);
190 }
191 type_init(spapr_rtc_register_types)