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Add ssm(4), which serves as a glue device allowing devices beneath the

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scalable shared memory node, which is used in large UltraSPARC III based
machines to group snooping-coherency domains together, like schizo(4) to
be treated like nexus(4) children.
This commit is contained in:
Marius Strobl 2010-02-13 19:05:34 +00:00
parent 527eebfeeb
commit f00d6a0cc2
2 changed files with 75 additions and 0 deletions
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1
sys/conf/files.sparc64
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@ -124,6 +124,7 @@ sparc64/sparc64/rwindow.c standard
sparc64/sparc64/sc_machdep.c optional sc
sparc64/sparc64/schppm.c standard
sparc64/sparc64/spitfire.c standard
sparc64/sparc64/ssm.c standard
sparc64/sparc64/stack_machdep.c optional ddb | stack
sparc64/sparc64/support.S standard \
compile-with "${NORMAL_S} -mcpu=ultrasparc"

74
sys/sparc64/sparc64/ssm.c Normal file
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@ -0,0 +1,74 @@
/*-
* Copyright (c) 2010 Marius Strobl <marius@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* Glue allowing devices beneath the scalable shared memory node to be
* treated like nexus(4) children
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <dev/ofw/ofw_bus.h>
#include <machine/nexusvar.h>
static device_probe_t ssm_probe;
static device_method_t ssm_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, ssm_probe),
/* Bus interface */
/* ofw_bus interface */
KOBJMETHOD_END
};
static devclass_t ssm_devclass;
DEFINE_CLASS_1(ssm, ssm_driver, ssm_methods, 1 /* no softc */, nexus_driver);
EARLY_DRIVER_MODULE(ssm, nexus, ssm_driver, ssm_devclass, 0, 0, BUS_PASS_BUS);
MODULE_DEPEND(ssm, nexus, 1, 1, 1);
MODULE_VERSION(ssm, 1);
static int
ssm_probe(device_t dev)
{
if (strcmp(ofw_bus_get_name(dev), "ssm") == 0) {
device_set_desc(dev, "Scalable Shared Memory");
return (BUS_PROBE_DEFAULT);
}
return (ENXIO);
}