/*
* SMP support for Celleb platform. (Incomplete)
*
* (C) Copyright 2006 TOSHIBA CORPORATION
*
* This code is based on arch/powerpc/platforms/cell/smp.c:
* Dave Engebretsen, Peter Bergner, and
* Mike Corrigan {engebret|bergner|mikec}@us.ibm.com
* Plus various changes from other IBM teams...
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#undef DEBUG
#include <linux/kernel.h>
#include <linux/smp.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/threads.h>
#include <linux/cpu.h>
#include <asm/irq.h>
#include <asm/smp.h>
#include <asm/machdep.h>
#include <asm/udbg.h>
#include "beat_interrupt.h"
#ifdef DEBUG
#define DBG(fmt...) udbg_printf(fmt)
#else
#define DBG(fmt...)
#endif
/*
* The primary thread of each non-boot processor is recorded here before
* smp init.
*/
/* static cpumask_t of_spin_map; */
/**
* smp_startup_cpu() - start the given cpu
*
* At boot time, there is nothing to do for primary threads which were
* started from Open Firmware. For anything else, call RTAS with the
* appropriate start location.
*
* Returns:
* 0 - failure
* 1 - success
*/
static inline int __devinit smp_startup_cpu(unsigned int lcpu)
{
return 0;
}
static void smp_beatic_message_pass(int target, int msg)
{
unsigned int i;
if (target < NR_CPUS) {
beatic_cause_IPI(target, msg);
} else {
for_each_online_cpu(i) {
if (target == MSG_ALL_BUT_SELF
&& i == smp_processor_id())
continue;
beatic_cause_IPI(i, msg);
}
}
}
static int __init smp_beatic_probe(void)
{
return cpus_weight(cpu_possible_map);
}
static void __devinit smp_beatic_setup_cpu(int cpu)
{
beatic_setup_cpu(cpu);
}
static void __devinit smp_celleb_kick_cpu(int nr)
{
BUG_ON(nr < 0 || nr >= NR_CPUS);
if (!smp_startup_cpu(nr))
return;
}
static int smp_celleb_cpu_bootable(unsigned int nr)
{
return 1;
}
static struct smp_ops_t bpa_beatic_smp_ops = {
.message_pass = smp_beatic_message_pass,
.probe = smp_beatic_probe,
.kick_cpu = smp_celleb_kick_cpu,
.setup_cpu = smp_beatic_setup_cpu,
.cpu_bootable = smp_celleb_cpu_bootable,
};
/* This is called very early */
void __init smp_init_celleb(void)
{
DBG(" -> smp_init_celleb()\n");
smp_ops = &bpa_beatic_smp_ops;
DBG(" <- smp_init_celleb()\n");
}
