bba9cbe374
In r342771, I introduced a regression in Power by abusing the platform smp_topo() method as a shortcut for providing the MI information needed for the stated sysctls. The smp_topo() method was already called later by sched_ule (under the name cpu_topo()), and initializes a static array of scheduler topology information. I had skimmed the smp_topo_foo() functions and assumed they were idempotent; empirically, they are not (or at least, detect re-initialization and panic). Do the cleaner thing I should have done in the first place and add a platform method specifically for core- and thread-count probing. Reported by: luporl via jhibbits Reviewed by: luporl X-MFC-With: r342771 Differential Revision: https://reviews.freebsd.org/D18777
69 lines
2.6 KiB
C
69 lines
2.6 KiB
C
/*-
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* SPDX-License-Identifier: BSD-4-Clause
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*
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* Copyright (C) 1996 Wolfgang Solfrank.
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* Copyright (C) 1996 TooLs GmbH.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by TooLs GmbH.
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* 4. The name of TooLs GmbH may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $NetBSD: powerpc.h,v 1.3 2000/06/01 00:49:59 matt Exp $
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* $FreeBSD$
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*/
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#ifndef _MACHINE_PLATFORM_H_
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#define _MACHINE_PLATFORM_H_
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#include <machine/smp.h>
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#include <machine/pcpu.h>
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struct mem_region {
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uint64_t mr_start;
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uint64_t mr_size;
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};
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/* Documentation for these functions is in platform_if.m */
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void mem_regions(struct mem_region **, int *, struct mem_region **, int *);
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vm_offset_t platform_real_maxaddr(void);
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u_long platform_timebase_freq(struct cpuref *);
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int platform_smp_first_cpu(struct cpuref *);
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int platform_smp_next_cpu(struct cpuref *);
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int platform_smp_get_bsp(struct cpuref *);
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int platform_smp_start_cpu(struct pcpu *);
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void platform_smp_timebase_sync(u_long tb, int ap);
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void platform_smp_ap_init(void);
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void platform_smp_probe_threads(void);
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const char *installed_platform(void);
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void platform_probe_and_attach(void);
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void platform_sleep(void);
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#endif /* _MACHINE_PLATFORM_H_ */
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