83d9fd40d5
nodes from the DTB by default. This will allow us to enumerate the CPUs without hard coding the CPU count into code. Reviewed by: br Sponsored by: ABT Systems Ltd Differential Revision: https://reviews.freebsd.org/D9827
108 lines
2.9 KiB
C
108 lines
2.9 KiB
C
/*-
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* Copyright (c) 2013 Andrew Turner
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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 "opt_platform.h"
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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/smp.h>
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#include <arm/include/platform.h>
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#include <arm/include/platformvar.h>
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#include <dev/ofw/openfirm.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <dev/ofw/ofw_cpu.h>
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#include <dev/fdt/fdt_common.h>
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#include "platform_if.h"
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#define FDT_PLATFORM(plat) \
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((fdt_platform_def_t *)(plat)->cls->baseclasses[0])
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#if defined(SMP)
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static platform_mp_setmaxid_t fdt_platform_mp_setmaxid;
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#endif
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static int
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fdt_platform_probe(platform_t plat)
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{
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const char *compat;
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phandle_t root;
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/*
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* TODO: Make these KASSERTs, we should only be here if we
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* are using the FDT platform magic.
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*/
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if (plat->cls == NULL || FDT_PLATFORM(plat) == NULL)
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return 1;
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/* Is the device is compatible? */
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root = OF_finddevice("/");
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compat = FDT_PLATFORM(plat)->fdt_compatible;
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if (ofw_bus_node_is_compatible(root, compat) != 0)
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return 0;
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/* Not compatible, return an error */
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return 1;
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}
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#if defined(SMP)
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static boolean_t
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fdt_platform_maxid(u_int id, phandle_t node, u_int addr_cells, pcell_t *reg)
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{
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if (mp_maxid < id)
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mp_maxid = id;
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return (true);
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}
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static void
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fdt_platform_mp_setmaxid(platform_t plat)
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{
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mp_maxid = PCPU_GET(cpuid);
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mp_ncpus = ofw_cpu_early_foreach(fdt_platform_maxid, true);
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if (mp_ncpus < 1)
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mp_ncpus = 1;
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mp_ncpus = MIN(mp_ncpus, MAXCPU);
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}
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#endif
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platform_method_t fdt_platform_methods[] = {
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PLATFORMMETHOD(platform_probe, fdt_platform_probe),
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#if defined(SMP)
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PLATFORMMETHOD(platform_mp_setmaxid, fdt_platform_mp_setmaxid),
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#endif
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PLATFORMMETHOD_END
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};
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