91 lines
2.8 KiB
C
91 lines
2.8 KiB
C
/* $NetBSD: cpus.c,v 1.4 2018/09/09 21:15:21 jmcneill Exp $ */
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/*-
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* Copyright (c) 2017 Jared McNeill <jmcneill@invisible.ca>
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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 ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* 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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__KERNEL_RCSID(0, "$NetBSD: cpus.c,v 1.4 2018/09/09 21:15:21 jmcneill Exp $");
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/device.h>
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#include <sys/intr.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/kmem.h>
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#include <dev/fdt/fdtvar.h>
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static int cpus_match(device_t, cfdata_t, void *);
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static void cpus_attach(device_t, device_t, void *);
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static bool cpus_bus_match(void *, int);
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CFATTACH_DECL_NEW(cpus, 0, cpus_match, cpus_attach, NULL, NULL);
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static int
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cpus_match(device_t parent, cfdata_t cf, void *aux)
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{
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struct fdt_attach_args * const faa = aux;
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return OF_finddevice("/cpus") == faa->faa_phandle;
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}
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static void
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cpus_attach(device_t parent, device_t self, void *aux)
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{
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struct fdt_attach_args * const faa = aux;
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const int phandle = faa->faa_phandle;
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aprint_naive("\n");
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aprint_normal("\n");
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fdt_add_bus_match(self, phandle, faa, cpus_bus_match, NULL);
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}
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static bool
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cpus_bus_match(void *priv, int child)
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{
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const char *s;
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/* Only match nodes with device_type = "cpu" */
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s = fdtbus_get_string(child, "device_type");
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if (!s || strcmp(s, "cpu") != 0)
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return false;
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/* If status is set, it must be either "okay" or "disabled" */
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s = fdtbus_get_string(child, "status");
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if (s) {
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if (strcmp(s, "okay") == 0)
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return false;
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if (strcmp(s, "disabled") == 0)
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return of_hasprop(child, "enable-method");
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return false;
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} else {
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return true;
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}
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}
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