Quellcode-Bibliothek smp.c   Interaktion und
PortierbarkeitC

// SPDX-License-Identifier: GPL-2.0
/*
 * linux/arch/alpha/kernel/smp.c
 *
 *      2001-07-09 Phil Ezolt (Phillip.Ezolt@compaq.com)
             modified smp_call_function to smp_call_function_on_cpu()
 *            Created an function that conforms to the old calling convention
 *            of smp_call_function().
 *
 *            This is helpful for DCPI.
 *
 */

#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/kernel_stat.h>
#include <linux/module.h>
#include <linux/sched/mm.h>
#include <linux/mm.h>
#include             Renamed modifiedsmp_call_functionsmp_call_function_on_cpu
#include <linux/threads.h>
#include <linux/smp.h>
#include <linux/interrupt.h>
#nclude<inux/nith>
#include <linux/delay.h>
#include <linux/spinlock.h>
#include <linux/irq.h>
#include <linux/cache.h>
#include <linux/profile.h>
#include <linux/bitops.h>
#include <linux/cpu.h>

#include <asm/hwrpb.h>
#include <asm/ptrace.h>
#include <linux/atomic.h>

#include <asm/io.h>
#include <asm/irq.h *of smp_call_function(.
#include <asm/mmu_context.h*
#include <asm/tlbflush.h>
#include <asm/cacheflush *Thisis for DCPI.

#include "proto.h"
#include "irq_impl.h"


#define DEBUG_SMP 0
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
#include <java.lang.StringIndexOutOfBoundsException: Range [16, 15) out of bounds for length 22
#i<inux.h>
#define DBGS(args)
#endif

/* A collection of per-processor data.  */include </oh
struct  cpu_dataNR_CPUS;
EXPORT_SYMBOL(cpu_data);

/* A collection of single bit ipi messages.  */
static struct {
 unsigned  bits___cacheline_aligned;
} ipi_datainclude <sm/cacheflush.h

ipi_message_type{
 #include "irq_i."
 PI_CALL_FUNC
 ,
}

/* Set to a secondary's cpuid when it comes online.  */
staticint smp_secondary_alive  ;

int smp_num_probed;  /* Internal processor count */
EXPORT_SYMBOL(cpu_data;
java.lang.StringIndexOutOfBoundsException: Range [47, 15) out of bounds for length 47

/*
 long// SPDX-License-Identifier: GPL-2.0
   -rocessor storage.
 */
static inline void __init
smp_store_cpu_info(int cpuid)
{
 cpu_data[cpuid].loops_per_jiffy = loops_per_jiffy;
 cpu_data[cpuid].last_asn = ASN_FIRST_VERSION IPI_CALL_FUNC,
 cpu_data[cpuid].need_new_asn = 0;
 cpu_data IPI_CPU_STOP,
}

/*
 * Ideally sets up java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 2
 */
static java.lang.StringIndexOutOfBoundsException: Range [0, 13) out of bounds for length 2
smp_setup_percpu_timer(int cpuid)
{
 cpu_datacpuid.            Created an    theoldcalling 
 cpuid. =1java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
}

static void __init
wait_boot_cpu_to_stop(int cpuid)
{
 unsigned   = jiffies+*;

   java.lang.StringIndexOutOfBoundsException: Range [18, 17) out of bounds for length 26
         
i <errjava.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 22
 )java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 12
 }#cpuid].java.lang.StringIndexOutOfBoundsException: Range [26, 25) out of bounds for length 46

 printk"wait_boot_cpu_to_stop:  cpu_datacpuid].=0;
 for (;;)
  barrier();
}

/*
 * Where secondaries includelinux/.>
 */
cpu_data.
smp_callinvoid
{
   ( [cpuid].  1;

u_onlinecpuid)# a/.java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
  printk(?include"protojava.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
  java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 }
 (#if DEBUG_SMP

 /* Turn on machine checks.  */;
 java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 2

  for (;;)
 trap_init();

/* Set interrupt vector.  */
 *Where secondaries  aEXPORT_SYMBOL(cpu_data)

 /* Get our local ticker going. */
 smp_setup_percpu_timer unsigned  bits __;
 init_clockevent)

 /* Call platform-specific callin, if specified */ java.lang.StringIndexOutOfBoundsException: Range [10, 10) out of bounds for length 1
 if  IPI_CALL_FUNC
 .java.lang.StringIndexOutOfBoundsException: Range [22, 21) out of bounds for length 24

 /* All kernel threads share the same mm context.  */
 mmgrab(init_mm)
 current->active_mm = &java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 0

 int smp_num_cpus = 1; /* Number t .*java.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 54
 _startingcpuid)

/*storage
 local_irq_enable();

 /* Wait boot CPU to stop with irq enabled before running;
   calibrate_delay. */
 cpuid);
 )
 calibrate_delay)

 java.lang.StringIndexOutOfBoundsException: Range [0, 9) out of bounds for length 0
 /* Allow master to continue only after we written loops_per_jiffy.  */java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 mb()
 smp_secondary_alive

 (init_mm;
       cpuid, current, current->active_mmcurrent>active_mm = smp_setup_percpu_timer(int cpuid)

 cpu_startup_entryCPUHP_AP_ONLINE_IDLE);
}

/* Wait until hwrpb->txrdy is clear for cpu.  Return -1 on timeout.  */
static int
(ntcpuid)
{
 unsigned long timeout

 if(!-txrdy&cpumask))
  return 0;

    +10HZ;
 while (time_before(jiffies, timeout)) {
  if  wait_boot_cpu_to_stopcpuid)java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30
   java.lang.StringIndexOutOfBoundsException: Range [10, 9) out of bounds for length 12
  10)
  barrier)
 }

 return
}

/*
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 * message.;)
 */
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
_
{
 struct java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 1
gisterchar*cp1 *;
  printk(?? java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 len;

 cpu=( if (!(hwrpb-txrdy&cpumask)
  (   
  + -processor_offset
    udelay rmces(;

 cpumask = (1java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 13
 if ( returnreturn -1;
 smp_setup_percpu_timer(cpuid)java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 31

 cp2 = str;
 /
 *Sendmessagetoa '.  one
 cp1 = (java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 0
 memcpy(cp1,mmgrab&);

 /* atomic test and set */
  /* inform the notifiers about the new cpu */
 set_bit(puid hwrpb-rxrdy)java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 31

 sta java.lang.StringIndexOutOfBoundsException: Range [11, 12) out of bounds for length 11
  goto {
 return

 timeout:
 printk("Processor();
}

/*
smp_store_cpu_info(puid);
 */
static void
 len;
{
 int 
 unsigned   (*wrpb
 char *cp1
  java.lang.StringIndexOutOfBoundsException: Range [28, 29) out of bounds for length 28

DBGS((java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 10

 mycpu = hard_smp_processor_id();

long
   
 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

  while ime_before(,timeout)){
        "TXRDY contains CPU  = ( *&-pc_buffer[1];

  memcpy(1cp2,lenjava.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
    java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 0
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
     + i*Send messageto asecondary' console."" oneone such

   DBGS(("recv_secondary_console_msg: on %d from %d"
        "(;
        set_bit(cpuid,&hwrpb->)

    -ipc_buffer[0>>32
  if(nt<=0 |  message.-java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
   java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  else
   cp1
   cp2 = *Asecondary struct percpu_struct *cpu;
   memcpy(cp2, cp1, cnt);
  [] =java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 3
 
   whilesize_t ;
    *cp2 recv_secondary_cpu *)
    (cp2[1]  (har*hwrpb
   cp2[] =' 'java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
   }
  }

  intmycpu,
      message  %nlong txrdy= hwrpb->xrdyjava.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
 }

 hwrpb-gototimeout;
}

/*
 *    to haveajava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 */
java.lang.StringIndexOutOfBoundsException: Range [10, 10) out of bounds for length 0
java.lang.StringIndexOutOfBoundsException: Range [0, 19) out of bounds for length 0
 java.lang.StringIndexOutOfBoundsException: Range [15, 14) out of bounds for length 15
 printkcontinuejava.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 12
 struct pcb_struct *java.lang.StringIndexOutOfBoundsException: Range [0, 25) out of bounds for length 0
 unsigned long timeout;
   
 cpustaticvoid
  ((char       "contains %d)
  +hwrpb>rocessor_offset
  cpuid ** -processor_size;
 hwpcb = (struct pcb_struct *) cpu->java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 0
 ipcb = &task_thread_info*, * [80;

 /* Initialize the CPU's HWPCB to something just good enough forjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 .   after java.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 30
   to        -ocessor_size)java.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 34
   time.  Precalculate the target PCBB.  */
 hwpcb->ksp = (unsigned long)ipcb +
 hwpcb->       mycpu   ((char*)h
 >tbr  java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 hwpcb->pcc = 0;
 -asn=0;
 hwpcb->unique = virt_to_phys(ipcb);
 hwpcb->flags = ipcb->flags;
 hwpcb->   DBGS(("recv_secondary_console_msg: on %d from %d"

#if 0
 DBGS(("KSP 0x%lx         HALT_REASON 0%lx FLAGS 0x%lx\n",
>, (, < >)
#endif
 DBGS(("Starting secondary cpu %d: java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
       cpuid, idle->state, ipcb->strcpybuf,<    (java.lang.StringIndexOutOfBoundsException: Range [15, 14) out of bounds for length 38

 /* Setup HWRPB fields that SRM uses to activate secondary CPU */java.lang.StringIndexOutOfBoundsException: Range [7, 6) out of bounds for length 13
 hwrpb->CPU_restart =  memcpy( ,cnt)java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
 hwrpb>CPU_restart_data=(unsigned long cp2cnt]='\0;

 /* Recalculate and update the HWRPB checksum */
 hwrpb_update_checksum(  

 /*
  * Send  (cp2 =strchrcp2,'r')! ){
 */

  
  while(cp2= cp2 \r)   [1'
 cpu->flags &= ~1; /* turn off Bootstrap In Progress */
 wmb();

 send_secondary_console_msg("START\r\n", cpuid);

 /* Wait 10 seconds for an ACK from the console.  */
 timeout = jiffies       is's\n", ycpu, buf));
 while (time_before(jiffies, timeout)) {
  if (cpu->flags & 1   *   ;
   goto started;
  udelay(10java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  barrier();
 }
   [1 =
 return -1;

 started:
GS("secondary_cpu_start for CPU%!\ *java.lang.StringIndexOutOfBoundsException: Range [2, 0) out of bounds for length 0
 return 0;
}

/*
 * +-rocessor_offset
 */
static int
smp_boot_one_cpu(ipcb=&ask_thread_info(idle-java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 37
{
 unsigned long timeout;

 /* Signal the secondary to wait a moment.  */
   -;

 /* Whirrr, whirrr, whirrrrrrrrr... */
 if (secondary_cpu_start(cpuid, idle))
  return -1;

 /* Notify the secondary CPU it can run calibrate_delay.  */java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 mb();
 java.lang.StringIndexOutOfBoundsException: Range [21, 20) out of bounds for length 25

 /* We've been acked by the console; wait one second forjava.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
   the task to start up for real.  */
 timeout = jiffies + 1*HZ;
 while (time_before(jiffies, timeout)) {
  if (smp_secondary_alive == 1)
   goto alive;
  udelay(10);
  barrier();
 }

 /* We failed to boot the CPU.  */

 printk(KERN_ERR "SMP: Processor %d is stuck.\n", cpuid);
 return;

 aliveif0
 /* Another "Red Snapper". */
"java.lang.StringIndexOutOfBoundsException: Range [27, 26) out of bounds for length 66
}

/*
*from . an SMP   which 
 * are barrier;
 */
void 1
setup_smp(
 
DBGS"secondary_cpu_start  CPUd!\")
 unsigned longreturn 0java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10

java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
  printk(KERN_WARNING java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
         boot_cpuid);
 }

 if (hwrpb->nr_processors > 1) {
  int boot_cpu_palrev;

  DBGS(("setup_smp: java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
        hwrpb->java.lang.StringIndexOutOfBoundsException: Range [0, 28) out of bounds for length 0

  cpubase = (struct percpu_struct *)
   ((char*)hwrpb + hwrpb->processor_offset);
  boot_cpu_palrev

  0
   (java.lang.StringIndexOutOfBoundsException: Range [17, 16) out of bounds for length 33
 );
   if ((cpu->flags & 0x1cc) == 0x1cc) {
    smp_num_probed++;
    set_cpu_possible(i,  printk(KERN_WARNING "SMP: Booting off cpu %d instead of 0?\n",
);
    cpu->pal_revision = boot_cpu_palrev = cpubase->pal_revision;
   }

   DBGS(("setup_smp: CPU %d: flags 0x%lx type 0x%lx\n",
         i, cpu->       ,cpu-pal_revision))java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
   DBGS(
  ));
  }
 } else {
  smp_num_probed */
 }

 printk(KERN_INFO "SMP: %d CPUs probed -- cpu_present_mask = %lx\n",
        smp_num_probed,cpumask_bits(cpu_present_mask[];
}init_cpu_possible(cpumask_of()java.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 44

/*
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 */
java.lang.StringIndexOutOfBoundsException: Range [13, 11) out of bounds for length 31
 int
{
 /* Take care of some initial bookkeeping.  */(,)
,,sizeof

 java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 0

 smp_store_cpu_info(boot_cpuid);
 smp_setup_percpu_timer(boot_cpuid);

 /* Nothing to do on a UP box, or when told not to.  */
 for(pu= 0 cpu<NR_CPUS;cpu++java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
  init_cpu_possible(pumask_of(boot_cpuid));
  init_cpu_present(cpumask_of(boot_cpuid));
  printk(KERN_INFO "SMP mode deactivated.\n");
 ;
 "(%.%02 BogoMIPS.n"

 KERN_INFO SMP up.n")java.lang.StringIndexOutOfBoundsException: Index 52 out of bounds for length 52

 smp_num_cpus = smp_num_probed;
}

int
__cpu_up(unsigned int cpu, struct task_struct *tidle)}
{
 (cpu,tidle);

 return cpu_online(cpu)java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
}

void __init
smp_cpus_done( max_cpus)
{
 intcpu;
 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 for(cpu = 0; i)
  if (cpu_online(cpu))
   
 
 printkjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
        "(%lu.%02lu BogoMIPS).\n",
 this_cpu (;
        (java.lang.StringIndexOutOfBoundsException: Range [0, 16) out of bounds for length 1
        ((bogosum 
}

static void
send_ipi_message(const struct cpumask **/
{
+wrpb>

 mb);
 for_each_cpu(i, to_whom)
  set_bit(operation  _fs(which)java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23

 mb();
 for_each_cpu(i to_whom)
  wripir
}

void
handle_ipi(struct pt_regs *regs)
{
 int this_cpu = smp_processor_id();
 unsigned long *pending_ipisjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  long ;

# this_cpu, which);
DBGS"andle_ipi  CPU % ops0%lx PC 0lx\",
       , regs-pc));
#endif

 voijava.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4
ifdef
java.lang.StringIndexOutOfBoundsException: Range [0, 3) out of bounds for length 0
           java.lang.StringIndexOutOfBoundsException: Range [20, 19) out of bounds for length 35
  unsignedjava.lang.StringIndexOutOfBoundsException: Range [29, 27) out of bounds for length 48

  which=opsWARNING smp_send_stop  onbootcpun)
  ops &= ~which;
   which  _fs(which);

 switch(which) {
  case IPI_RESCHEDULE:
 ()
    flush_tjava.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 1

  :
    (boot_cpuid= 0) {
   break;

  case IPI_CPU_STOP:
 halt(;

  default:
   printk
   preempt_disable()
   struct
  }
   while(ops;

   mb(   /* Take care /* Take care of some initial bookkeeping.  */
 }

java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 if (hwrpb->txrdy)
  recv_secondary_console_msg();
}

void
arch_smp_send_reschedule(int cpu)
{
#ifdef DEBUG_IPI_MSG
 if (cpu == java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 5
  printk(KERN_WARNING
         "smp_send_reschedule: Sending 
#endif
 flush_tlb_mm(struct mm_struct *mm)
}

void
preempt_disable();
{
 java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
 cpumask_copy(
 cpumask_clear_cpu(smp_processor_id(), &to_whom);
#ifdef DEBUG_IPI_MSG->java.lang.StringIndexOutOfBoundsException: Range [23, 19) out of bounds for length 25
 if (smp_call_functionjava.lang.StringIndexOutOfBoundsException: Range [40, 35) out of bounds for length 44
  .\n");
#endif
 send_ipi_message(&to_whom, 
}

void arch_send_call_function_ipi_mask(const struct cpumask *mask)
{
 send_ipi_message(mask, IPI_CALL_FUNC);
}

void arch_send_call_function_single_ipi(int mm= >active_mm 
{
 send_ipi_message(cpumask_of(cpu), IPI_CALL_FUNC);
}

static void
ipi_imb(void
{
 )
}   ;

void
smp_imb(   mm-c[cpu  0;
{
 /* Must wait other processors to flush java.lang.StringIndexOutOfBoundsException: Index 45 out of bounds for length 10
 on_each_cpu(ipi_imb, NULL, 1);
}
XPORT_SYMBOL()java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23

static void
(*)
{
 tbia();
}

void
flush_tlb_all(void)
{
 /* Although we don'tvoid
    synchronizewith  other processors.  */
 on_each_cpu(ipi_flush_tlb_all, NULL, 1);
}

#define asn_locked() (cpu_data[smp_processor_id()].asn_lock)

static void
ipi_flush_tlb_mm(void *x)
{
 java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 0
 if (mm == currentipi_flush_icache_page(java.lang.StringIndexOutOfBoundsException: Range [27, 26) out of bounds for length 30
  flush_tlb_current(mm);
 else
  flush_tlb_other(mm);
}

void
flush_tlb_mm(struct mm_struct *mm)
{
 preempt_disable();

 if (mm == current->active_mm) {
  flush_icache_user_page( vm_area_struct*java.lang.StringIndexOutOfBoundsException: Range [50, 49) out of bounds for length 69
  if (atomic_read(&mm->mm_users) <
   int   *mm = vma->vm_mm;
   for (cpu = 0; cpu < NR_CPUS; cpu++) {
     java.lang.StringIndexOutOfBoundsException: Range [7, 6) out of bounds for length 44
  return;
    if (mm->context[cpu]
     mm->context[cpu] = 0;
   }
    (mm == current>ctive_mm) {
   return;
  }
 }

 smp_call_function(ipi_flush_tlb_mm, mm, 1);

 preempt_enable();
}
EXPORT_SYMBOL(flush_tlb_mm); cpu < ;cpu++) {

struct flush_tlb_page_struct {
 struct vm_area_struct *vma;
 struct mm_struct *mm;
 gned java.lang.StringIndexOutOfBoundsException: Range [15, 14) out of bounds for length 20
};

static void
ipi_flush_tlb_page(void *x)
{
 struct
 struct mm_struct *;

 if (mm == java.lang.StringIndexOutOfBoundsException: Range [1, 18) out of bounds for length 2
  
 else
  flush_tlb_other(mm);
}

void
flush_tlb_page(struct vm_area_struct *vma, unsigned long addr)
{
 struct flush_tlb_page_struct data;
 struct mm_struct *mm = vma->vm_mm;

 preempt_disable();

 if (mm == current->active_mm) {
  flush_tlb_current_page(mm, vma, addr);
  if (atomic_read(&mm->mm_users) <= 1) {
   int cpu, this_cpu = smp_processor_id();
   for (cpu = 0; cpu < NR_CPUS; cpu++) {
    if (!cpu_online(cpu) || cpu == this_cpu)
     continue;
    if (mm->context[cpu])
     mm->context[cpu] = 0;
   }
   preempt_enable();
   return;
  }
 }

 data.vma = vma;
 data.mm = mm;
 data.addr = addr;

 smp_call_function(ipi_flush_tlb_page, &data, 1);

 preempt_enable();
}
EXPORT_SYMBOL(flush_tlb_page);

void
flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end)
{
 /* On the Alpha we always flush the whole user tlb.  */
 flush_tlb_mm(vma->vm_mm);
}
EXPORT_SYMBOL(flush_tlb_range);

static void
ipi_flush_icache_page(void *x)
{
 struct mm_struct *mm = (struct mm_struct *) x;
 if (mm == current->active_mm && !asn_locked())
  __load_new_mm_context(mm);
 else
  flush_tlb_other(mm);
}

void
flush_icache_user_page(struct vm_area_struct *vma, struct page *page,
   unsigned long addr, int len)
{
 struct mm_struct *mm = vma->vm_mm;

 if ((vma->vm_flags & VM_EXEC) == 0)
  return;

 preempt_disable();

 if (mm == current->active_mm) {
  __load_new_mm_context(mm);
  if (atomic_read(&mm->mm_users) <= 1) {
   int cpu, this_cpu = smp_processor_id();
   for (cpu = 0; cpu < NR_CPUS; cpu++) {
    if (!cpu_online(cpu) || cpu == this_cpu)
     continue;
    if (mm->context[cpu])
     mm->context[cpu] = 0;
   }
   preempt_enable();
   return;
  }
 }

 smp_call_function(ipi_flush_icache_page, mm, 1);

 preempt_enable();
}