LXR linux/arch/alpha/include/asm/smp.h

   1#ifndef __ASM_SMP_H
   2#define __ASM_SMP_H
   3
   4#include <linux/threads.h>
   5#include <linux/cpumask.h>
   6#include <linux/bitops.h>
   7#include <asm/pal.h>
   8
   9/* HACK: Cabrio WHAMI return value is bogus if more than 8 bits used.. :-( */
  10
  11static __inline__ unsigned char
  12__hard_smp_processor_id(void)
  13{
  14        register unsigned char __r0 __asm__("$0");
  15        __asm__ __volatile__(
  16                "call_pal %1 #whami"
  17                : "=r"(__r0)
  18                :"i" (PAL_whami)
  19                : "$1", "$22", "$23", "$24", "$25");
  20        return __r0;
  21}
  22
  23#ifdef CONFIG_SMP
  24
  25#include <asm/irq.h>
  26
  27struct cpuinfo_alpha {
  28        unsigned long loops_per_jiffy;
  29        unsigned long last_asn;
  30        int need_new_asn;
  31        int asn_lock;
  32        unsigned long ipi_count;
  33        unsigned long prof_multiplier;
  34        unsigned long prof_counter;
  35        unsigned char mcheck_expected;
  36        unsigned char mcheck_taken;
  37        unsigned char mcheck_extra;
  38} __attribute__((aligned(64)));
  39
  40extern struct cpuinfo_alpha cpu_data[NR_CPUS];
  41
  42#define hard_smp_processor_id() __hard_smp_processor_id()
  43#define raw_smp_processor_id()  (current_thread_info()->cpu)
  44
  45extern int smp_num_cpus;
  46
  47extern void arch_send_call_function_single_ipi(int cpu);
  48extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
  49
  50#else /* CONFIG_SMP */
  51
  52#define hard_smp_processor_id()         0
  53#define smp_call_function_on_cpu(func,info,wait,cpu)    ({ 0; })
  54
  55#endif /* CONFIG_SMP */
  56
  57#define NO_PROC_ID      (-1)
  58
  59#endif
  60