svn commit: r327906 - in head/sys: conf powerpc/mpc85xx

[Pedro Giffuni]

On 12/01/2018 20:36, Justin Hibbits wrote:
> Author: jhibbits
> Date: Sat Jan 13 01:36:37 2018
> New Revision: 327906
> URL: https://svnweb.freebsd.org/changeset/base/327906
> ...
>
> Added: head/sys/powerpc/mpc85xx/mpc85xx_cache.c
> ==============================================================================
> --- /dev/null	00:00:00 1970	(empty, because file is newly added)
> +++ head/sys/powerpc/mpc85xx/mpc85xx_cache.c	Sat Jan 13 01:36:37 2018	(r327906)
> @@ -0,0 +1,129 @@
> +/*-
> + * Copyright (c) 2018 Justin Hibbits
> + * 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.
> + *
> + * $FreeBSD$
> + */
> +

Can we please add SPDX ID tags, specially on new code?
I had them added to the guidelines:

https://www.freebsd.org/doc/en_US.ISO8859-1/articles/committers-guide/pref-license.html

It is just not fun for me anymore to go hunting for untagged files and 
they keep appearing ;).

Pedro.






> +#include <sys/cdefs.h>
> +__FBSDID("$FreeBSD$");
> +
> +#include <sys/param.h>
> +#include <sys/systm.h>
> +#include <sys/conf.h>
> +#include <sys/bus.h>
> +#include <sys/kernel.h>
> +#include <sys/module.h>
> +#include <sys/lock.h>
> +#include <sys/mutex.h>
> +#include <sys/resource.h>
> +#include <sys/rman.h>
> +
> +#include <machine/bus.h>
> +#include <machine/resource.h>
> +#include <machine/stdarg.h>
> +
> +#include <dev/fdt/fdt_common.h>
> +#include <dev/ofw/ofw_bus.h>
> +#include <dev/ofw/ofw_bus_subr.h>
> +
> +/*
> + * From the P1022 manual, sequence for writing to L2CTL is:
> + * - mbar
> + * - isync
> + * - write
> + * - read
> + * - mbar
> + */
> +#define	L2_CTL		0x0
> +#define	  L2CTL_L2E	  0x80000000
> +#define	  L2CTL_L2I	  0x40000000
> +struct mpc85xx_cache_softc {
> +	struct resource	*sc_mem;
> +};
> +
> +static int
> +mpc85xx_cache_probe(device_t dev)
> +{
> +
> +	if (!ofw_bus_is_compatible(dev, "cache"))
> +		return (ENXIO);
> +
> +	device_set_desc(dev, "MPC85xx L2 cache");
> +	return (0);
> +}
> +
> +static int
> +mpc85xx_cache_attach(device_t dev)
> +{
> +	struct mpc85xx_cache_softc *sc = device_get_softc(dev);
> +	int rid;
> +	int cache_line_size, cache_size;
> +
> +	/* Map registers. */
> +	rid = 0;
> +	sc->sc_mem = bus_alloc_resource_any(dev,
> +		     SYS_RES_MEMORY, &rid, RF_ACTIVE);
> +	if (sc->sc_mem == NULL)
> +		return (ENOMEM);
> +
> +	/* Enable cache and flash invalidate. */
> +	__asm __volatile ("mbar; isync" ::: "memory");
> +	bus_write_4(sc->sc_mem, L2_CTL, L2CTL_L2E | L2CTL_L2I);
> +	bus_read_4(sc->sc_mem, L2_CTL);
> +	__asm __volatile ("mbar" ::: "memory");
> +
> +	cache_line_size = 0;
> +	cache_size = 0;
> +	OF_getencprop(ofw_bus_get_node(dev), "cache-size", &cache_size,
> +	    sizeof(cache_size));
> +	OF_getencprop(ofw_bus_get_node(dev), "cache-line-size",
> +	    &cache_line_size, sizeof(cache_line_size));
> +
> +	if (cache_line_size != 0 && cache_size != 0)
> +		device_printf(dev,
> +		    "L2 cache size: %dKB, cache line size: %d bytes\n",
> +		    cache_size / 1024, cache_line_size);
> +
> +	return (0);
> +}
> +
> +static device_method_t mpc85xx_cache_methods[] = {
> +	/* device methods */
> +	DEVMETHOD(device_probe, 	mpc85xx_cache_probe),
> +	DEVMETHOD(device_attach, 	mpc85xx_cache_attach),
> +
> +	DEVMETHOD_END
> +};
> +
> +static driver_t mpc85xx_cache_driver = {
> +	"cache",
> +	mpc85xx_cache_methods,
> +	sizeof(struct mpc85xx_cache_softc),
> +};
> +static devclass_t mpc85xx_cache_devclass;
> +
> +EARLY_DRIVER_MODULE(mpc85xx_cache, simplebus, mpc85xx_cache_driver,
> +    mpc85xx_cache_devclass, NULL, NULL,
> +    BUS_PASS_RESOURCE + BUS_PASS_ORDER_MIDDLE);
>