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
  11 static __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
  27 struct 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
  40 extern struct cpuinfo_alpha cpu_data[NR_CPUS];
  41
  42 #define PROC_CHANGE_PENALTY     20
  43
  44 #define hard_smp_processor_id() __hard_smp_processor_id()
  45 #define raw_smp_processor_id()  (current_thread_info()->cpu)
  46
  47 extern int smp_num_cpus;
  48
  49 extern void arch_send_call_function_single_ipi(int cpu);
  50 extern void arch_send_call_function_ipi(cpumask_t mask);
  51
  52 #else /* CONFIG_SMP */
  53
  54 #define hard_smp_processor_id()         0
  55 #define smp_call_function_on_cpu(func,info,wait,cpu)    ({ 0; })
  56
  57 #endif /* CONFIG_SMP */
  58
  59 #define NO_PROC_ID      (-1)
  60
  61 #endif