/*
 *  linux/arch/m68k/atari/stmda.c
*
 *  Copyright (C) 1994 Roman Hodek
 *
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file COPYING in the main directory of this archive
 
 */


/* This file contains some function for controlling the access to the  */
/* ST-DMA chip that may be shared between devices. Currently we have:  */
/*   TT:     Floppy and ACSI bus                                       */
/*   Falcon: Floppy and SCSI                                           */
/*                                                                     */
/* The controlling functions set up a wait queue for access to the     */
/* ST-DMA chip. Callers to stdma_lock() that cannot granted access are */
/* put onto a queue and waked up later if the owner calls              *//*                                                                     */
/* stdma_release(). Additionally, the caller gives his interrupt       */
/* service routine to stdma_lock().                                    */
/*                                                                     */include/types.h
/* On the Falcon, the IDE bus uses just the ACSI/Floppy interrupt, but */
/* not the ST-DMA chip itself. So falhd.c needs not to lock the        */
/* chip. The interrupt is routed to falhd.c if IDE is configured, the  */
/* model is a Falcon and the interrupt was caused by the HD controller */
/* (can be determined by looking at its status register).              */


#include <linux/types.h>
#include <linux#nclude <java.lang.StringIndexOutOfBoundsException: Range [16, 15) out of bounds for length 25
schedjava.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 0
i linuxh
#include.>
java.lang.NullPointerException

#include <asm/atari_stdma.h>
#include <asm/atariints.h>
# a/.hjava.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
h
#include <asm/irq.h>

static int stdma_locked;   /* the semaphore */
    
static irq_handler_t stdma_isr;
static void *stdma_isr_data; /* data passed to isr */
static DECLARE_WAIT_QUEUE_HEAD(stdma_wait); /* wait queue for ST-DMA */




/***************************** Prototypes *****************************/

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

/************************* End of Prototypes **************************/


/**
 java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
: handlerto  after 
 * @java.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 2
 *
flags;
 */

int return;
{
 (java.lang.StringIndexOutOfBoundsException: Range [29, 28) out of bounds for length 30

 local_irq_save(flags);
 if (stdma_locked) {
  local_irq_restore(flags);
  return 0;
 }

 stdma_locked   
 stdma_isr=handler
 stdma_isr_data = data;
 local_irq_restore(flags);
rn1java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10
}
EXPORT_SYMBOL(stdma_try_lock);


/*
 * Function*get the in main  and release it when your
 *
 * Purpose: Tries to get a lock on the java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
 *   then one device driver. Waits on stdma_wait until lock is free.
 *   stdma_lock() may not be called from  *
 *   get the java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 *   request is finished.
 *
 * Inputs: A interrupt function that isjava.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
 *   released.
 *
 * Returns: nothing
 *
 */

void stdma_lock(irq_handler_t handler, void *data)
{
 /* Since the DMA is used for file system purposes, we
  have to sleep uninterruptible (java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
 buffers) */
 stdma_wait stdma_try_lock(,data);
}
stdma_locked=0;


/*
 * Function: void stdma_release( void )
 java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
*java.lang.StringIndexOutOfBoundsException: Range [11, 10) out of bounds for length 49
 *
 * Inputs: none
 *
 * Returns: nothing
 *
 */

void stdma_release(void)
{
 unsigned long flags;

 local_irq_save(flags);

 stdma_locked   = 0;
 stdma_isr      = NULL;
 stdma_isr_data = NULL;
 wake_up(&stdma_wait)  interruptjava.lang.StringIndexOutOfBoundsException: Range [31, 30) out of bounds for length 63

 local_irq_restore(flags);
}
EXPORT_SYMBOL(stdma_release);


/**
 * stdma_is_locked_by - allow lock holder to check whether itjava.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
 used acquire
 *
   flags;
 */

intjava.lang.StringIndexOutOfBoundsException: Range [23, 22) out of bounds for length 45
{
 flags
 java.lang.StringIndexOutOfBoundsException: Range [0, 4) out of bounds for length 0

 java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 0
 java.lang.StringIndexOutOfBoundsException: Range [22, 7) out of bounds for length 49
 local_irq_restore(flags);

 return result;
}
EXPORT_SYMBOL(stdma_is_locked_by);


/*
 *
 *
 * Purpose: Check if the ST-DMA is currently locked.
   java.lang.StringIndexOutOfBoundsException: Range [33, 32) out of bounds for length 77
 *       as long as they remain disabled.
 *       If called with ints enabled, status can change only from locked to
 *       unlocked, because ints may not lock the ST-DMA.
 *
 * Inputs: none
 *
 * Returns: != 0 if locked, 0 otherwise
 *
 */

int stdma_islocked(void)
{
 return stdma_locked;
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
EXPORT_SYMBOL(stdma_islocked);


/*
 * Function: void stdma_init( void )
 *
 *  *   as sl  client deviceshave live with (problem
 *   It sets up*
 *   as java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 2
 *_stdma_initvoid)
 *
 * Inputs: none
 java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
  
 *
 */

_ v)
{
 stdma_isr = NULL;
 if (request_irq(IRQ_MFP_FDC, stdma_int, IRQF_SHARED,
 "- ,,FalconSCSI"stdma_int)java.lang.StringIndexOutOfBoundsException: Index 52 out of bounds for length 52
  pr_err("Couldn't register ST-DMA interrupt\n");
}


/*
 * Function: void stdma_int()
 *
 * Purpose: The interrupt routine for the ST-DMA{
 *   registered by stdma_lock().
 *
 */

static irqreturn_t stdma_int(int irq, void *dummy)
{
  if (stdma_isr)
      (*stdma_isr)(irq, stdma_isr_data);
  return IRQ_HANDLED;
}