include/asm-sh/smp.h

   1 #ifndef __ASM_SH_SMP_H
   2 #define __ASM_SH_SMP_H
   3
   4 #include <linux/bitops.h>
   5 #include <linux/cpumask.h>
   6
   7 #ifdef CONFIG_SMP
   8
   9 #include <linux/spinlock.h>
  10 #include <asm/atomic.h>
  11 #include <asm/current.h>
  12
  13 #define raw_smp_processor_id()  (current_thread_info()->cpu)
  14 #define hard_smp_processor_id() plat_smp_processor_id()
  15
  16 /* Map from cpu id to sequential logical cpu number. */
  17 extern int __cpu_number_map[NR_CPUS];
  18 #define cpu_number_map(cpu)  __cpu_number_map[cpu]
  19
  20 /* The reverse map from sequential logical cpu number to cpu id.  */
  21 extern int __cpu_logical_map[NR_CPUS];
  22 #define cpu_logical_map(cpu)  __cpu_logical_map[cpu]
  23
  24 /* I've no idea what the real meaning of this is */
  25 #define PROC_CHANGE_PENALTY     20
  26
  27 #define NO_PROC_ID      (-1)
  28
  29 struct smp_fn_call_struct {
  30         spinlock_t lock;
  31         atomic_t   finished;
  32         void (*fn)(void *);
  33         void *data;
  34 };
  35
  36 extern struct smp_fn_call_struct smp_fn_call;
  37
  38 #define SMP_MSG_FUNCTION        0
  39 #define SMP_MSG_RESCHEDULE      1
  40 #define SMP_MSG_NR              2
  41
  42 void plat_smp_setup(void);
  43 void plat_prepare_cpus(unsigned int max_cpus);
  44 int plat_smp_processor_id(void);
  45 void plat_start_cpu(unsigned int cpu, unsigned long entry_point);
  46 void plat_send_ipi(unsigned int cpu, unsigned int message);
  47 int plat_register_ipi_handler(unsigned int message,
  48                               void (*handler)(void *), void *arg);
  49
  50 #else
  51
  52 #define hard_smp_processor_id() (0)
  53
  54 #endif /* CONFIG_SMP */
  55
  56 #endif /* __ASM_SH_SMP_H */