7a8d25c037
Requirements) systems from the projects/pseries branch. This in principle includes all IBM POWER hardware released in the last 15 years with the exception of POWER3-based systems when run in 64-bit mode. The main development target, however, has been the PAPR logical partition support that is the default target in KVM on POWER and QEMU -- mileage may vary on actual hardware at present. Much of the heavy lifting here was done by Andreas Tobler. Approved by: re (kib)
174 lines
4.2 KiB
C
174 lines
4.2 KiB
C
/*-
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* Copyright (c) 2011 Nathan Whitehorn
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/clock.h>
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#include <sys/cpu.h>
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#include <sys/kernel.h>
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#include <sys/reboot.h>
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#include <sys/sysctl.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/openfirm.h>
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#include <machine/rtas.h>
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#include "clock_if.h"
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static int rtasdev_probe(device_t);
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static int rtasdev_attach(device_t);
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/* clock interface */
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static int rtas_gettime(device_t dev, struct timespec *ts);
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static int rtas_settime(device_t dev, struct timespec *ts);
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static void rtas_shutdown(void *arg, int howto);
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static device_method_t rtasdev_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, rtasdev_probe),
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DEVMETHOD(device_attach, rtasdev_attach),
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/* clock interface */
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DEVMETHOD(clock_gettime, rtas_gettime),
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DEVMETHOD(clock_settime, rtas_settime),
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{ 0, 0 },
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};
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static driver_t rtasdev_driver = {
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"rtas",
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rtasdev_methods,
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0
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};
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static devclass_t rtasdev_devclass;
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DRIVER_MODULE(rtasdev, nexus, rtasdev_driver, rtasdev_devclass, 0, 0);
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static int
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rtasdev_probe(device_t dev)
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{
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const char *name = ofw_bus_get_name(dev);
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if (strcmp(name, "rtas") != 0)
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return (ENXIO);
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if (!rtas_exists())
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return (ENXIO);
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device_set_desc(dev, "Run-Time Abstraction Services");
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return (0);
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}
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static int
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rtasdev_attach(device_t dev)
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{
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if (rtas_token_lookup("get-time-of-day") != -1)
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clock_register(dev, 2000);
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EVENTHANDLER_REGISTER(shutdown_final, rtas_shutdown, NULL,
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SHUTDOWN_PRI_LAST);
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return (0);
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}
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static int
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rtas_gettime(device_t dev, struct timespec *ts) {
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struct clocktime ct;
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cell_t tod[8];
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cell_t token;
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int error;
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token = rtas_token_lookup("get-time-of-day");
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if (token == -1)
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return (ENXIO);
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error = rtas_call_method(token, 0, 8, &tod[0], &tod[1], &tod[2],
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&tod[3], &tod[4], &tod[5], &tod[6], &tod[7]);
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if (error < 0)
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return (ENXIO);
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if (tod[0] != 0)
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return ((tod[0] == -1) ? ENXIO : EAGAIN);
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ct.year = tod[1];
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ct.mon = tod[2];
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ct.day = tod[3];
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ct.hour = tod[4];
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ct.min = tod[5];
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ct.sec = tod[6];
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ct.nsec = tod[7];
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return (clock_ct_to_ts(&ct, ts));
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}
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static int
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rtas_settime(device_t dev, struct timespec *ts)
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{
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struct clocktime ct;
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cell_t token, status;
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int error;
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token = rtas_token_lookup("set-time-of-day");
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if (token == -1)
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return (ENXIO);
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clock_ts_to_ct(ts, &ct);
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error = rtas_call_method(token, 7, 1, ct.year, ct.mon, ct.day, ct.hour,
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ct.min, ct.sec, ct.nsec, &status);
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if (error < 0)
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return (ENXIO);
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if (status != 0)
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return (((int)status < 0) ? ENXIO : EAGAIN);
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return (0);
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}
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static void
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rtas_shutdown(void *arg, int howto)
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{
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cell_t token, status;
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if (howto & RB_HALT) {
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token = rtas_token_lookup("power-off");
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if (token == -1)
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return;
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rtas_call_method(token, 2, 1, 0, 0, &status);
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} else {
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token = rtas_token_lookup("system-reboot");
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if (token == -1)
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return;
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rtas_call_method(token, 0, 1, &status);
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}
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}
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