Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
55 lines
1.2 KiB
C
55 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Smp support for CHRP machines.
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*
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* Written by Cort Dougan (cort@cs.nmt.edu) borrowing a great
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* deal of code from the sparc and intel versions.
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*
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* Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
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*
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*/
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/smp.h>
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#include <linux/interrupt.h>
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#include <linux/kernel_stat.h>
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#include <linux/delay.h>
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#include <linux/spinlock.h>
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#include <linux/pgtable.h>
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#include <asm/ptrace.h>
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#include <linux/atomic.h>
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#include <asm/irq.h>
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#include <asm/page.h>
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#include <asm/sections.h>
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#include <asm/io.h>
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#include <asm/smp.h>
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#include <asm/machdep.h>
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#include <asm/mpic.h>
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#include <asm/rtas.h>
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static int smp_chrp_kick_cpu(int nr)
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{
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*(unsigned long *)KERNELBASE = nr;
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asm volatile("dcbf 0,%0"::"r"(KERNELBASE):"memory");
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return 0;
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}
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static void smp_chrp_setup_cpu(int cpu_nr)
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{
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mpic_setup_this_cpu();
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}
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/* CHRP with openpic */
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struct smp_ops_t chrp_smp_ops = {
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.cause_nmi_ipi = NULL,
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.message_pass = smp_mpic_message_pass,
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.probe = smp_mpic_probe,
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.kick_cpu = smp_chrp_kick_cpu,
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.setup_cpu = smp_chrp_setup_cpu,
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.give_timebase = rtas_give_timebase,
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.take_timebase = rtas_take_timebase,
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};
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