root/include/asm-sparc/smp.h

/* */

INCLUDED FROM

DEFINITIONS

1. smp_processor_id

   1 /* smp.h: Sparc specific SMP stuff.
   2  *
   3  * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
   4  */
   5 
   6 #ifndef _SPARC_SMP_H
   7 #define _SPARC_SMP_H
   8 
   9 #include <asm/bitops.h>
  10 #include <asm/ptrace.h>
  11 
  12 /* Per processor Sparc parameters. */
  13 
  14 struct cpuinfo_sparc {
  15         unsigned char impl;
  16         unsigned char vers;
  17         unsigned long udelay_val;
  18 };
  19 
  20 extern struct cpuinfo_sparc cpu_data[NR_CPUS];
  21 
  22 typedef klock_t volatile unsigned char;
  23 extern klock_t kernel_lock;
  24 
  25 #define KLOCK_HELD       0xff
  26 #define KLOCK_CLEAR      0x00
  27 
  28 struct sparc_ipi_invalidate {
  29         struct mm_struct *mm;
  30         unsigned long addr;   /* page for inv_pg, start for inv_rnge */
  31         unsigned long end;    /* Used for inv_rnge only. */
  32 };
  33 
  34 struct sparc_ipimsg {
  35         union {
  36                 /* Add more here as we need them. */
  37                 struct sparc_ipi_invalidate invmsg;
  38         };
  39 };
  40 
  41 extern void smp_scan_prom_for_cpus(unsigned long, unsigned long);
  42 extern unsigned long smp_alloc_memory(unsigned long mem_base);
  43 extern unsigned long *kernel_stacks[NR_CPUS];
  44 extern unsigned char boot_cpu_id;
  45 extern unsigned long cpu_present_map;
  46 extern volatile unsigned long smp_invalidate_needed;
  47 extern unsigned long kernel_counter;
  48 extern volatile unsigned char active_kernel_processor;
  49 extern void smp_message_irq(int cpl, struct pt_regs *regs);
  50 extern void smp_reschedule_irq(int cpl, struct pt_regs *regs);
  51 extern void smp_invalidate_rcv(void);
  52 extern volatils unsigned long syscall_count;
  53 
  54 extern void (*smp_invalidate_all)(void);
  55 extern void (*smp_invalidate_mm)(struct mm_struct *);
  56 extern void (*smp_invalidate_range)(struct mm_struct *, unsigned long, unsigned long);
  57 extern void (*smp_invalidate_page)(struct vm_area_struct *, unsigned long);
  58 
  59 extern void smp_callin(void);
  60 extern void smp_boot_cpus(void);
  61 extern void smp_store_cpu_info(int id);
  62 
  63 extern _inline_ int smp_processor_id(void)
     /*  */
  64 {
  65         int cpuid;
  66 
  67         __asm__ __volatile__("rd %%tbr, %0\n\t"
  68                              "srl %0, 24, %0\n\t"
  69                              "and %0, 3, %0\n\t" :
  70                              "=&r" (cpuid) :
  71                              "0" (cpuid));
  72         return cpuid;
  73 }
  74 
  75 /* Imperical PROM processor mailbox constants.  If the per-cpu mailbox
  76  * contains something other than one of these then the ipi is from
  77  * Linux's active_kernel_processor.  This facility exists so that
  78  * the boot monitor can capture all the other cpus when one catches
  79  * a watchdog reset or the user enters the monitor using L1-A keys.
  80  */
  81 #define MBOX_STOPCPU          0xFB
  82 #define MBOX_IDLECPU          0xFC
  83 #define MBOX_IDLECPU2         0xFD
  84 #define MBOX_STOPCPU2         0xFE
  85 
  86 
  87 #define NO_PROC_ID            0xFF
  88 
  89 #define PROC_CHANGE_PENALTY   0x23
  90 
  91 #endif /* !(_SPARC_SMP_H) */

/* */