861be32ce7
Change the PS3 irq allocation routines to take an argument indicating which cpu (processor thread) the interrupt should be serviced on. The current system configuration favors device interrupts that are serviced on cpu0, so that is used as the default. Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com> Acked-by: Arnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
158 lines
3.6 KiB
C
158 lines
3.6 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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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 <asm/ps3.h>
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#include "platform.h"
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#if defined(DEBUG)
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#define DBG(fmt...) udbg_printf(fmt)
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#else
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#define DBG(fmt...) do{if(0)printk(fmt);}while(0)
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#endif
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static irqreturn_t ipi_function_handler(int irq, void *msg)
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{
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smp_message_recv((int)(long)msg);
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return IRQ_HANDLED;
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}
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/**
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* 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, virqs[MSG_COUNT]);
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static const char *names[MSG_COUNT] = {
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"ipi call",
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"ipi reschedule",
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"ipi migrate",
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"ipi debug brk"
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};
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static void do_message_pass(int target, 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(virqs, target)[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__, target, msg, result);
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}
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static void ps3_smp_message_pass(int target, int msg)
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{
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int cpu;
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if (target < NR_CPUS)
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do_message_pass(target, msg);
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else if (target == MSG_ALL_BUT_SELF) {
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for_each_online_cpu(cpu)
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if (cpu != smp_processor_id())
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do_message_pass(cpu, msg);
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} else {
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for_each_online_cpu(cpu)
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do_message_pass(cpu, msg);
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}
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}
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static int ps3_smp_probe(void)
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{
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return 2;
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}
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static void __init ps3_smp_setup_cpu(int cpu)
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{
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int result;
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unsigned int *virqs = per_cpu(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 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_DEBUGGER_BREAK != 3);
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for (i = 0; i < MSG_COUNT; i++) {
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result = ps3_alloc_event_irq(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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request_irq(virqs[i], ipi_function_handler, IRQF_DISABLED,
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names[i], (void*)(long)i);
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}
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ps3_register_ipi_debug_brk(cpu, virqs[PPC_MSG_DEBUGGER_BREAK]);
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DBG(" <- %s:%d: (%d)\n", __func__, __LINE__, cpu);
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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(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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ps3_free_event_irq(virqs[i]);
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free_irq(virqs[i], (void*)(long)i);
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virqs[i] = NO_IRQ;
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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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.setup_cpu = ps3_smp_setup_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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