qemu/hw/ppc/spapr_rtc.c
David Gibson ce2918cbc3 spapr: Use CamelCase properly
The qemu coding standard is to use CamelCase for type and structure names,
and the pseries code follows that... sort of.  There are quite a lot of
places where we bend the rules in order to preserve the capitalization of
internal acronyms like "PHB", "TCE", "DIMM" and most commonly "sPAPR".

That was a bad idea - it frequently leads to names ending up with hard to
read clusters of capital letters, and means they don't catch the eye as
type identifiers, which is kind of the point of the CamelCase convention in
the first place.

In short, keeping type identifiers look like CamelCase is more important
than preserving standard capitalization of internal "words".  So, this
patch renames a heap of spapr internal type names to a more standard
CamelCase.

In addition to case changes, we also make some other identifier renames:
  VIOsPAPR* -> SpaprVio*
    The reverse word ordering was only ever used to mitigate the capital
    cluster, so revert to the natural ordering.
  VIOsPAPRVTYDevice -> SpaprVioVty
  VIOsPAPRVLANDevice -> SpaprVioVlan
    Brevity, since the "Device" didn't add useful information
  sPAPRDRConnector -> SpaprDrc
  sPAPRDRConnectorClass -> SpaprDrcClass
    Brevity, and makes it clearer this is the same thing as a "DRC"
    mentioned in many other places in the code

This is 100% a mechanical search-and-replace patch.  It will, however,
conflict with essentially any and all outstanding patches touching the
spapr code.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2019-03-12 14:33:05 +11:00

189 lines
5.4 KiB
C

/*
* QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator
*
* RTAS Real Time Clock
*
* Copyright (c) 2010-2011 David Gibson, IBM Corporation.
* Copyright 2014 David Gibson, Red Hat.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "qemu/timer.h"
#include "sysemu/sysemu.h"
#include "hw/ppc/spapr.h"
#include "qapi/error.h"
#include "qapi/qapi-events-target.h"
#include "qemu/cutils.h"
void spapr_rtc_read(SpaprRtcState *rtc, struct tm *tm, uint32_t *ns)
{
int64_t host_ns = qemu_clock_get_ns(rtc_clock);
int64_t guest_ns;
time_t guest_s;
assert(rtc);
guest_ns = host_ns + rtc->ns_offset;
guest_s = guest_ns / NANOSECONDS_PER_SECOND;
if (tm) {
gmtime_r(&guest_s, tm);
}
if (ns) {
*ns = guest_ns;
}
}
int spapr_rtc_import_offset(SpaprRtcState *rtc, int64_t legacy_offset)
{
if (!rtc) {
return -ENODEV;
}
rtc->ns_offset = legacy_offset * NANOSECONDS_PER_SECOND;
return 0;
}
static void rtas_get_time_of_day(PowerPCCPU *cpu, SpaprMachineState *spapr,
uint32_t token, uint32_t nargs,
target_ulong args,
uint32_t nret, target_ulong rets)
{
struct tm tm;
uint32_t ns;
if ((nargs != 0) || (nret != 8)) {
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
return;
}
spapr_rtc_read(&spapr->rtc, &tm, &ns);
rtas_st(rets, 0, RTAS_OUT_SUCCESS);
rtas_st(rets, 1, tm.tm_year + 1900);
rtas_st(rets, 2, tm.tm_mon + 1);
rtas_st(rets, 3, tm.tm_mday);
rtas_st(rets, 4, tm.tm_hour);
rtas_st(rets, 5, tm.tm_min);
rtas_st(rets, 6, tm.tm_sec);
rtas_st(rets, 7, ns);
}
static void rtas_set_time_of_day(PowerPCCPU *cpu, SpaprMachineState *spapr,
uint32_t token, uint32_t nargs,
target_ulong args,
uint32_t nret, target_ulong rets)
{
SpaprRtcState *rtc = &spapr->rtc;
struct tm tm;
time_t new_s;
int64_t host_ns;
if ((nargs != 7) || (nret != 1)) {
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
return;
}
tm.tm_year = rtas_ld(args, 0) - 1900;
tm.tm_mon = rtas_ld(args, 1) - 1;
tm.tm_mday = rtas_ld(args, 2);
tm.tm_hour = rtas_ld(args, 3);
tm.tm_min = rtas_ld(args, 4);
tm.tm_sec = rtas_ld(args, 5);
new_s = mktimegm(&tm);
if (new_s == -1) {
rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
return;
}
/* Generate a monitor event for the change */
qapi_event_send_rtc_change(qemu_timedate_diff(&tm));
host_ns = qemu_clock_get_ns(rtc_clock);
rtc->ns_offset = (new_s * NANOSECONDS_PER_SECOND) - host_ns;
rtas_st(rets, 0, RTAS_OUT_SUCCESS);
}
static void spapr_rtc_qom_date(Object *obj, struct tm *current_tm, Error **errp)
{
spapr_rtc_read(SPAPR_RTC(obj), current_tm, NULL);
}
static void spapr_rtc_realize(DeviceState *dev, Error **errp)
{
SpaprRtcState *rtc = SPAPR_RTC(dev);
struct tm tm;
time_t host_s;
int64_t rtc_ns;
/* Initialize the RTAS RTC from host time */
qemu_get_timedate(&tm, 0);
host_s = mktimegm(&tm);
rtc_ns = qemu_clock_get_ns(rtc_clock);
rtc->ns_offset = host_s * NANOSECONDS_PER_SECOND - rtc_ns;
object_property_add_tm(OBJECT(rtc), "date", spapr_rtc_qom_date, NULL);
}
static const VMStateDescription vmstate_spapr_rtc = {
.name = "spapr/rtc",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_INT64(ns_offset, SpaprRtcState),
VMSTATE_END_OF_LIST()
},
};
static void spapr_rtc_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
dc->realize = spapr_rtc_realize;
dc->vmsd = &vmstate_spapr_rtc;
/* Reason: This is an internal device only for handling the hypercalls */
dc->user_creatable = false;
spapr_rtas_register(RTAS_GET_TIME_OF_DAY, "get-time-of-day",
rtas_get_time_of_day);
spapr_rtas_register(RTAS_SET_TIME_OF_DAY, "set-time-of-day",
rtas_set_time_of_day);
}
static const TypeInfo spapr_rtc_info = {
.name = TYPE_SPAPR_RTC,
.parent = TYPE_DEVICE,
.instance_size = sizeof(SpaprRtcState),
.class_init = spapr_rtc_class_init,
};
static void spapr_rtc_register_types(void)
{
type_register_static(&spapr_rtc_info);
}
type_init(spapr_rtc_register_types)