Linux Kernel  3.7.1
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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 
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