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Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation version 2 of the license this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 59 temple place suite 330 boston ma 02111 1307 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 83 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070034.021731668@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
120 lines
2.5 KiB
C
120 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* PS3 SMP routines.
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*
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* Copyright (C) 2006 Sony Computer Entertainment Inc.
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* Copyright 2006 Sony Corp.
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*/
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#include <linux/kernel.h>
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#include <linux/smp.h>
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#include <asm/machdep.h>
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#include <asm/udbg.h>
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#include "platform.h"
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#if defined(DEBUG)
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#define DBG udbg_printf
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#else
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#define DBG pr_debug
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#endif
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/**
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* ps3_ipi_virqs - a per cpu array of virqs for ipi use
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*/
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#define MSG_COUNT 4
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static DEFINE_PER_CPU(unsigned int [MSG_COUNT], ps3_ipi_virqs);
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static void ps3_smp_message_pass(int cpu, int msg)
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{
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int result;
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unsigned int virq;
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if (msg >= MSG_COUNT) {
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DBG("%s:%d: bad msg: %d\n", __func__, __LINE__, msg);
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return;
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}
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virq = per_cpu(ps3_ipi_virqs, cpu)[msg];
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result = ps3_send_event_locally(virq);
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if (result)
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DBG("%s:%d: ps3_send_event_locally(%d, %d) failed"
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" (%d)\n", __func__, __LINE__, cpu, msg, result);
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}
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static void __init ps3_smp_probe(void)
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{
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int cpu;
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for (cpu = 0; cpu < 2; cpu++) {
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int result;
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unsigned int *virqs = per_cpu(ps3_ipi_virqs, cpu);
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int i;
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DBG(" -> %s:%d: (%d)\n", __func__, __LINE__, cpu);
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/*
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* Check assumptions on ps3_ipi_virqs[] indexing. If this
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* check fails, then a different mapping of PPC_MSG_
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* to index needs to be setup.
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*/
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BUILD_BUG_ON(PPC_MSG_CALL_FUNCTION != 0);
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BUILD_BUG_ON(PPC_MSG_RESCHEDULE != 1);
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BUILD_BUG_ON(PPC_MSG_TICK_BROADCAST != 2);
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BUILD_BUG_ON(PPC_MSG_NMI_IPI != 3);
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for (i = 0; i < MSG_COUNT; i++) {
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result = ps3_event_receive_port_setup(cpu, &virqs[i]);
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if (result)
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continue;
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DBG("%s:%d: (%d, %d) => virq %u\n",
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__func__, __LINE__, cpu, i, virqs[i]);
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result = smp_request_message_ipi(virqs[i], i);
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if (result)
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virqs[i] = 0;
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else
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ps3_register_ipi_irq(cpu, virqs[i]);
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}
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ps3_register_ipi_debug_brk(cpu, virqs[PPC_MSG_NMI_IPI]);
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DBG(" <- %s:%d: (%d)\n", __func__, __LINE__, cpu);
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}
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}
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void ps3_smp_cleanup_cpu(int cpu)
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{
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unsigned int *virqs = per_cpu(ps3_ipi_virqs, cpu);
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int i;
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DBG(" -> %s:%d: (%d)\n", __func__, __LINE__, cpu);
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for (i = 0; i < MSG_COUNT; i++) {
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/* Can't call free_irq from interrupt context. */
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ps3_event_receive_port_destroy(virqs[i]);
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virqs[i] = 0;
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}
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DBG(" <- %s:%d: (%d)\n", __func__, __LINE__, cpu);
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}
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static struct smp_ops_t ps3_smp_ops = {
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.probe = ps3_smp_probe,
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.message_pass = ps3_smp_message_pass,
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.kick_cpu = smp_generic_kick_cpu,
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};
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void smp_init_ps3(void)
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{
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DBG(" -> %s\n", __func__);
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smp_ops = &ps3_smp_ops;
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DBG(" <- %s\n", __func__);
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}
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