56 lines
2.1 KiB
C
56 lines
2.1 KiB
C
/* $NetBSD: cpus_fdt.c,v 1.1 2023/06/12 12:58:17 skrll Exp $ */
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/*-
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* Copyright (c) 2023 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Nick Hudson
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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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: cpus_fdt.c,v 1.1 2023/06/12 12:58:17 skrll Exp $");
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#include <sys/param.h>
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#include <sys/types.h>
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#include <dev/fdt/fdtvar.h>
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#include <machine/machdep.h>
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void
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fdtbus_cpus_md_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 cpus = faa->faa_phandle;
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uint32_t tbfreq;
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int ret = of_getprop_uint32(cpus, "timebase-frequency", &tbfreq);
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if (ret < 0) {
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aprint_error(": can't get timebase frequency\n");
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return;
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}
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riscv_timer_frequency_set(tbfreq);
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}
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