threeeye
bc1d038eac
Squashed backup commit (no shallow-clone history issues) of xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream commit 9eece662e) plus all fixes applied to get everpal_defconfig building clean against a modern (GCC 15.2.0) toolchain -- see the previous commit message on the lineage-23.2 branch (also in this repo history is not available here since this is a squashed snapshot; full incremental history lives in the local DL380 checkout and the upstream GitHub remote). Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
56 lines
1.2 KiB
C
56 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 <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/pgtable.h>
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#include <asm/sections.h>
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#include <asm/io.h>
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#include <asm/prom.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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