include/asm-alpha/smp.h

   1 #ifndef __ASM_SMP_H
   2 #define __ASM_SMP_H
   3
   4 #ifdef __SMP__
   5
   6 #include <linux/tasks.h>
   7 #include <asm/init.h>
   8 #include <asm/pal.h>
   9
  10 struct cpuinfo_alpha {
  11         unsigned long loops_per_sec;
  12         unsigned long *pgd_cache;
  13         unsigned long *pte_cache;
  14         unsigned long pgtable_cache_sz;
  15         unsigned long ipi_count;
  16         unsigned long prof_multiplier;
  17         unsigned long prof_counter;
  18 } __cacheline_aligned;
  19
  20 extern struct cpuinfo_alpha cpu_data[NR_CPUS];
  21
  22 #define PROC_CHANGE_PENALTY     20
  23
  24 /* Map from cpu id to sequential logical cpu number.  This will only
  25    not be idempotent when cpus failed to come on-line.  */
  26 extern int cpu_number_map[NR_CPUS];
  27
  28 /* The reverse map from sequential logical cpu number to cpu id.  */
  29 extern int __cpu_logical_map[NR_CPUS];
  30 #define cpu_logical_map(cpu)  __cpu_logical_map[cpu]
  31
  32 /* HACK: Cabrio WHAMI return value is bogus if more than 8 bits used.. :-( */
  33
  34 static __inline__ unsigned char hard_smp_processor_id(void)
  35 {
  36         register unsigned char __r0 __asm__("$0");
  37         __asm__ __volatile__(
  38                 "call_pal %1 #whami"
  39                 : "=r"(__r0)
  40                 :"i" (PAL_whami)
  41                 : "$1", "$22", "$23", "$24", "$25");
  42         return __r0;
  43 }
  44
  45 #define smp_processor_id()      (current->processor)
  46
  47 #endif /* __SMP__ */
  48
  49 #define NO_PROC_ID      (-1)
  50
  51 #endif