release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/plat-brcm/include/mach/smp.h

   1 /*
   2  * derived from arch/arm/mach-realview/include/mach/smp.h
   3  *
   4  * This file is required from common architecture code,
   5  * in arch/arm/include/asm/smp.h
   6  */
   7
   8 #ifndef __ASM_ARCH_SMP_H
   9 #define __ASM_ARCH_SMP_H __FILE__
  10
  11 #include <asm/hardware/gic.h>
  12
  13 extern void platform_secondary_startup(void);
  14
  15 /* Used in hotplug.c */
  16 #define hard_smp_processor_id()                 \
  17         ({                                              \
  18                 unsigned int cpunum;                    \
  19                 __asm__("mrc p15, 0, %0, c0, c0, 5"     \
  20                         : "=r" (cpunum));               \
  21                 cpunum &= 0x0F;                         \
  22         })
  23
  24 /*
  25  * We use IRQ1 as the IPI
  26  */
  27 static inline void smp_cross_call(const struct cpumask *mask)
  28 {
  29         gic_raise_softirq(mask, 1);
  30 }
  31
  32 #endif /* __ASM_ARCH_SMP_H */