[linux-2.6-block.git] / arch / powerpc / platforms / cell / beat_smp.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 "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 int __init smp_beatic_probe(void)
{
	return cpumask_weight(cpu_possible_mask);
}

static void __devinit smp_beatic_setup_cpu(int cpu)
{
	beatic_setup_cpu(cpu);
}

static int __devinit smp_celleb_kick_cpu(int nr)
{
	BUG_ON(nr < 0 || nr >= NR_CPUS);

	return smp_startup_cpu(nr);
}

static int smp_celleb_cpu_bootable(unsigned int nr)
{
	return 1;
}
static struct smp_ops_t bpa_beatic_smp_ops = {
	.message_pass	= beatic_cause_IPI,
	.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");
}
Commit	Line	Data
c347b798 IK	1	/*
	2	* SMP support for Celleb platform. (Incomplete)
	3	*
	4	* (C) Copyright 2006 TOSHIBA CORPORATION
	5	*
	6	* This code is based on arch/powerpc/platforms/cell/smp.c:
	7	* Dave Engebretsen, Peter Bergner, and
	8	* Mike Corrigan {engebret\|bergner\|mikec}@us.ibm.com
	9	* Plus various changes from other IBM teams...
	10	*
	11	* This program is free software; you can redistribute it and/or modify
	12	* it under the terms of the GNU General Public License as published by
	13	* the Free Software Foundation; either version 2 of the License, or
	14	* (at your option) any later version.
	15	*
	16	* This program is distributed in the hope that it will be useful,
	17	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	19	* GNU General Public License for more details.
	20	*
	21	* You should have received a copy of the GNU General Public License along
	22	* with this program; if not, write to the Free Software Foundation, Inc.,
	23	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	24	*/
	25
	26	#undef DEBUG
	27
	28	#include <linux/kernel.h>
	29	#include <linux/smp.h>
	30	#include <linux/interrupt.h>
	31	#include <linux/init.h>
	32	#include <linux/threads.h>
	33	#include <linux/cpu.h>
	34
	35	#include <asm/irq.h>
	36	#include <asm/smp.h>
	37	#include <asm/machdep.h>
	38	#include <asm/udbg.h>
	39
ad2c6987	40	#include "beat_interrupt.h"
c347b798 IK	41
	42	#ifdef DEBUG
	43	#define DBG(fmt...) udbg_printf(fmt)
	44	#else
	45	#define DBG(fmt...)
	46	#endif
	47
	48	/*
	49	* The primary thread of each non-boot processor is recorded here before
	50	* smp init.
	51	*/
	52	/* static cpumask_t of_spin_map; */
	53
	54	/**
	55	* smp_startup_cpu() - start the given cpu
	56	*
	57	* At boot time, there is nothing to do for primary threads which were
	58	* started from Open Firmware. For anything else, call RTAS with the
	59	* appropriate start location.
	60	*
	61	* Returns:
	62	* 0 - failure
	63	* 1 - success
	64	*/
	65	static inline int __devinit smp_startup_cpu(unsigned int lcpu)
	66	{
	67	return 0;
	68	}
	69
c347b798 IK	70	static int __init smp_beatic_probe(void)
c347b798 IK	71	{
104699c0	72	return cpumask_weight(cpu_possible_mask);
c347b798 IK	73	}
	74
	75	static void __devinit smp_beatic_setup_cpu(int cpu)
	76	{
	77	beatic_setup_cpu(cpu);
	78	}
	79
de300974	80	static int __devinit smp_celleb_kick_cpu(int nr)
c347b798 IK	81	{
	82	BUG_ON(nr < 0 \|\| nr >= NR_CPUS);
	83
de300974	84	return smp_startup_cpu(nr);
c347b798 IK	85	}
	86
	87	static int smp_celleb_cpu_bootable(unsigned int nr)
	88	{
	89	return 1;
	90	}
	91	static struct smp_ops_t bpa_beatic_smp_ops = {
f1072939	92	.message_pass = beatic_cause_IPI,
c347b798 IK	93	.probe = smp_beatic_probe,
	94	.kick_cpu = smp_celleb_kick_cpu,
	95	.setup_cpu = smp_beatic_setup_cpu,
	96	.cpu_bootable = smp_celleb_cpu_bootable,
	97	};
	98
	99	/* This is called very early */
	100	void __init smp_init_celleb(void)
	101	{
	102	DBG(" -> smp_init_celleb()\n");
	103
	104	smp_ops = &bpa_beatic_smp_ops;
	105
	106	DBG(" <- smp_init_celleb()\n");
	107	}