arch/arm/mach-ux500/include/mach/smp.h

   1 /*
   2  * This file is based ARM realview platform.
   3  * Copyright (C) ARM Limited.
   4  *
   5  * This file is licensed under  the terms of the GNU General Public
   6  * License version 2. This program is licensed "as is" without any
   7  * warranty of any kind, whether express or implied.
   8  */
   9 #ifndef ASMARM_ARCH_SMP_H
  10 #define ASMARM_ARCH_SMP_H
  11
  12 #include <asm/hardware/gic.h>
  13
  14 /* This is required to wakeup the secondary core */
  15 extern void u8500_secondary_startup(void);
  16
  17 #define hard_smp_processor_id()                         \
  18         ({                                              \
  19                 unsigned int cpunum;                    \
  20                 __asm__("mrc p15, 0, %0, c0, c0, 5"     \
  21                         : "=r" (cpunum));               \
  22                 cpunum &= 0x0F;                         \
  23         })
  24
  25 /*
  26  * We use IRQ1 as the IPI
  27  */
  28 static inline void smp_cross_call(const struct cpumask *mask)
  29 {
  30         gic_raise_softirq(mask, 1);
  31 }
  32 #endif