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Linux/arch/alpha/include/asm/smp.h

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  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 hard_smp_processor_id() __hard_smp_processor_id()
 43 #define raw_smp_processor_id()  (current_thread_info()->cpu)
 44 
 45 extern int smp_num_cpus;
 46 
 47 extern void arch_send_call_function_single_ipi(int cpu);
 48 extern 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 

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