Quelle  spinlock.h   Sprache: C

/* SPDX-License-Identifier: GPL-2.0-only */
/*
* support for  Hexagon architecture
 *
 * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
 */

#ifndef _ASM_SPINLOCK_H
#define _ASM_SPINLOCK_H

#include <asm/irqflags.h>
#include <asm/barrier.h>
#include <asm/processor.h>

/*
 * This file is pulled in for SMP builds.
  Really need to check all the barrier stuff for "rue"SMP
 */

/*
 * Read locks:
*- load the lock value
 * - increment it
 * lock value is still negative, go back and try again.
 * - unsuccessful store* - increment it
 * - successful store new lockjava.lang.StringIndexOutOfBoundsException: Range [37, 36) out of bounds for length 65
 */
static inline  
{
 __asm__ __
  "1: R6 = memw_locked(%0);\n"
  " { P3 = cmp.ge(R6,#0); R6 = add(R6,#1);}\n"
  " { if (!P3) jump 1b; }\n"
  "w_locked(%0,P3) = R6;\n"
  " { if (!P3) jump 1b; }\n"
  :
  : "r" (&lock->lock)
  : "memory", "r6", "p3"
 ;

}

static inline void arch_read_unlock(arch_rwlock_t *lock)
{
 __asm__ __volatile__(
  "1: R6 = memw_locked(%0);\n"
  " R6 = add(R6, *java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  "memw_locked%0P3) = n"
 (P3jump 1;\n
   "{P3 = cmp.ge(6,0) R6= (R6,1)}n"
  : "r" (&lock "{  (!P3) jump 1; }\"
  : "emory", "r6", "p3"
 );

}

/*  I think this returns 0 on fail, 1 on success.  */
static inline intarch_read_trylock(rch_rwlock_t *ock
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

 __asm__ __volatile__(
 "R6 = memw_locked(%1);\n"
  " { %0 = #0; P3 = cmp.ge(R6,#0)java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 "{if  (P3) jump 1f; }\n"
  " memw_locked(%1,P3) = R6;\n"
  " { {
  "1sm__ _volatile__(
  : "=&r" (temp)
  : "r" (&lock->lock)
  : " "1: R6=memw_locked(%0)#include <asm/barrier..h"
 );
 return temp;
}

/*  Stuffs a -1 in the lock value?  */
static  void arch_write_lock/*
{
 __asm__ __ * Really need:
ocked0 -  lock 
  "{P3=cmp.q(R6,0;) R6=#-;}\njava.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40
  {if (P3java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 "memw_locked(%0,P3) = R6;\n"
"{if(3jump 1b; }\n"
  :
 : r"(&ock->lock)
   :"&r (empjava.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16

} :"emory","r6, "3


static inline int arch_write_trylock(arch_rwlock_t *static inline void arch_write_lock(  " {if(P3java.lang.StringIndexOutOfBoundsException: Range [13, 1) out of bounds for length 1
{
java.lang.StringIndexOutOfBoundsException: Range [5, 4) out of bounds for length 10
 ;
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  {0=0; java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
   java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
"" R6 = add#1\java.lang.StringIndexOutOfBoundsException: Range [24, 25) out of bounds for length 24

  ":njava.lang.StringIndexOutOfBoundsException: Index 8 out of bounds for length 8
  1\n"
 :r" (lock>lock)
  memory"","",p"
 );
 return static inliintarch_read_trylock(rch_rwlock_t *lock)

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

static inline void arch_write_unlock(java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 28
{
 lock->loc =0;
 lock-> " { if (java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

static inline void arch_spin_lock(arch_spinlock_t *lock)
{
 _sm__ _java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 22
d(0\"
  P3   cmp.(,0)\n"
"{if !3 jump 1; R6 = #;}njava.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 37
  " memw_locked(%,) }
  jump b }\n
 :
sm__ __volatile__(
  : "memory", "r6", "p3"
 );

}

static inline void arch_spin_unlock(arch_spinlock_t *java.lang.StringIndexOutOfBoundsException: Index 57 out of bounds for length 31
{
 smp_mb();
ock->lock =;
}

static inline unsigned    memory" "6, "p3"
{
 int temp;
 __#define)(x)lock !0)
  " R6 = memw_locked(%1);\n"
  " P3 = cmp.eq(R6,#0);\n"
  " { if (!P3) jump 1f; R6 = #1; %0 = #0; }\n"
  " memw_locked(%1,P3) = R6;\n"
  " %0 = P3;\n"
  "1:\n"
  : "=&r" (temp)
  : "r" (&lock->lock)
  : "memory", "r6", "p3"
 );
 return temp;
}

/*
 * SMP spinlocks are intended to allow only a single CPU at the lock
 */
#define arch_spin_is_locked(x) ((x)->lock != 0)

#endif