c347b7989e
This patch adds base support for Celleb platform. Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp> Acked-by: Arnd Bergmann <arnd.bergmann@de.ibm.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
124 lines
2.9 KiB
C
124 lines
2.9 KiB
C
/*
|
|
* 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 "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");
|
|
}
|