include/asm-ppc/smp.h

   1 /* smp.h: PPC specific SMP stuff.
   2  *
   3  * Original was a copy of sparc smp.h.  Now heavily modified
   4  * for PPC.
   5  *
   6  * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
   7  * Copyright (C) 1996-2001 Cort Dougan <cort@fsmlabs.com>
   8  */
   9 #ifdef __KERNEL__
  10 #ifndef _PPC_SMP_H
  11 #define _PPC_SMP_H
  12
  13 #include <linux/config.h>
  14 #include <linux/kernel.h>
  15 #include <linux/bitops.h>
  16 #include <linux/errno.h>
  17 #include <linux/cpumask.h>
  18 #include <linux/threads.h>
  19
  20 #ifdef CONFIG_SMP
  21
  22 #ifndef __ASSEMBLY__
  23
  24 struct cpuinfo_PPC {
  25         unsigned long loops_per_jiffy;
  26         unsigned long pvr;
  27         unsigned long *pgd_cache;
  28         unsigned long *pte_cache;
  29         unsigned long pgtable_cache_sz;
  30 };
  31
  32 extern struct cpuinfo_PPC cpu_data[];
  33 extern cpumask_t cpu_online_map;
  34 extern cpumask_t cpu_possible_map;
  35 extern unsigned long smp_proc_in_lock[];
  36 extern volatile unsigned long cpu_callin_map[];
  37 extern int smp_tb_synchronized;
  38
  39 extern void smp_send_tlb_invalidate(int);
  40 extern void smp_send_xmon_break(int cpu);
  41 struct pt_regs;
  42 extern void smp_message_recv(int, struct pt_regs *);
  43
  44 #define NO_PROC_ID              0xFF            /* No processor magic marker */
  45 #define PROC_CHANGE_PENALTY     20
  46
  47 #define smp_processor_id() (current_thread_info()->cpu)
  48
  49 extern int __cpu_up(unsigned int cpu);
  50
  51 extern int smp_hw_index[];
  52 #define hard_smp_processor_id() (smp_hw_index[smp_processor_id()])
  53
  54 struct klock_info_struct {
  55         unsigned long kernel_flag;
  56         unsigned char akp;
  57 };
  58
  59 extern struct klock_info_struct klock_info;
  60 #define KLOCK_HELD       0xffffffff
  61 #define KLOCK_CLEAR      0x0
  62
  63 #endif /* __ASSEMBLY__ */
  64
  65 #else /* !(CONFIG_SMP) */
  66
  67 #endif /* !(CONFIG_SMP) */
  68
  69 #endif /* !(_PPC_SMP_H) */
  70 #endif /* __KERNEL__ */