arch/arm/plat-omap/include/plat/smp.h

   1 /*
   2  * OMAP4 machine specific smp.h
   3  *
   4  * Copyright (C) 2009 Texas Instruments, Inc.
   5  *
   6  * Author:
   7  *      Santosh Shilimkar <santosh.shilimkar@ti.com>
   8  *
   9  * Interface functions needed for the SMP. This file is based on arm
  10  * realview smp platform.
  11  * Copyright (c) 2003 ARM Limited.
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License version 2 as
  15  * published by the Free Software Foundation.
  16  */
  17 #ifndef OMAP_ARCH_SMP_H
  18 #define OMAP_ARCH_SMP_H
  19
  20 #include <asm/hardware/gic.h>
  21
  22 /*
  23  * set_event() is used to wake up secondary core from wfe using sev. ROM
  24  * code puts the second core into wfe(standby).
  25  *
  26  */
  27 #define set_event()     __asm__ __volatile__ ("sev" : : : "memory")
  28
  29 /* Needed for secondary core boot */
  30 extern void omap_secondary_startup(void);
  31 extern u32 omap_modify_auxcoreboot0(u32 set_mask, u32 clear_mask);
  32 extern void omap_auxcoreboot_addr(u32 cpu_addr);
  33
  34 /*
  35  * We use Soft IRQ1 as the IPI
  36  */
  37 static inline void smp_cross_call(const struct cpumask *mask)
  38 {
  39         gic_raise_softirq(mask, 1);
  40 }
  41
  42 /*
  43  * Read MPIDR: Multiprocessor affinity register
  44  */
  45 #define hard_smp_processor_id()                 \
  46         ({                                              \
  47                 unsigned int cpunum;                    \
  48                 __asm__("mrc p15, 0, %0, c0, c0, 5"     \
  49                         : "=r" (cpunum));               \
  50                 cpunum &= 0x0F;                         \
  51         })
  52
  53 #endif