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smp.h

/*
 * OMAP4 machine specific smp.h
 *
 * Copyright (C) 2009 Texas Instruments, Inc.
 *
 * Author:
 *    Santosh Shilimkar <santosh.shilimkar@ti.com>
 *
 * Interface functions needed for the SMP. This file is based on arm
 * realview smp platform.
 * Copyright (c) 2003 ARM Limited.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#ifndef OMAP_ARCH_SMP_H
#define OMAP_ARCH_SMP_H

#include <asm/hardware/gic.h>

/*
 * set_event() is used to wake up secondary core from wfe using sev. ROM
 * code puts the second core into wfe(standby).
 *
 */
#define set_event()     __asm__ __volatile__ ("sev" : : : "memory")

/* Needed for secondary core boot */
extern void omap_secondary_startup(void);

/*
 * We use Soft IRQ1 as the IPI
 */
static inline void smp_cross_call(const struct cpumask *mask)
{
      gic_raise_softirq(mask, 1);
}

/*
 * Read MPIDR: Multiprocessor affinity register
 */
#define hard_smp_processor_id()                 \
      ({                                  \
            unsigned int cpunum;                \
            __asm__("mrc p15, 0, %0, c0, c0, 5" \
                  : "=r" (cpunum));       \
            cpunum &= 0x0F;                     \
      })

#endif

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