freebsd-dev/sys/dev/fdt/fdt_arm_platform.c

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/*-
* Copyright (c) 2013 Andrew Turner
* 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 "opt_platform.h"
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/smp.h>
#include <arm/include/platform.h>
#include <arm/include/platformvar.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/ofw/ofw_cpu.h>
#include <dev/fdt/fdt_common.h>
#include "platform_if.h"
#define FDT_PLATFORM(plat) \
((fdt_platform_def_t *)(plat)->cls->baseclasses[0])
#if defined(SMP)
static platform_mp_setmaxid_t fdt_platform_mp_setmaxid;
#endif
static int
fdt_platform_probe(platform_t plat)
{
const char *compat;
phandle_t root;
/*
* TODO: Make these KASSERTs, we should only be here if we
* are using the FDT platform magic.
*/
if (plat->cls == NULL || FDT_PLATFORM(plat) == NULL)
return 1;
/* Is the device is compatible? */
root = OF_finddevice("/");
compat = FDT_PLATFORM(plat)->fdt_compatible;
if (ofw_bus_node_is_compatible(root, compat) != 0)
return 0;
/* Not compatible, return an error */
return 1;
}
#if defined(SMP)
static boolean_t
fdt_platform_maxid(u_int id, phandle_t node, u_int addr_cells, pcell_t *reg)
{
if (mp_maxid < id)
mp_maxid = id;
return (true);
}
static void
fdt_platform_mp_setmaxid(platform_t plat)
{
mp_maxid = PCPU_GET(cpuid);
mp_ncpus = ofw_cpu_early_foreach(fdt_platform_maxid, true);
if (mp_ncpus < 1)
mp_ncpus = 1;
mp_ncpus = MIN(mp_ncpus, MAXCPU);
}
#endif
platform_method_t fdt_platform_methods[] = {
PLATFORMMETHOD(platform_probe, fdt_platform_probe),
#if defined(SMP)
PLATFORMMETHOD(platform_mp_setmaxid, fdt_platform_mp_setmaxid),
#endif
PLATFORMMETHOD_END
};