/* *linux/arch/m68k/atari/stmda.c * *Copyright(C)1994RomanHodek * * *ThisfileissubjecttothetermsandconditionsoftheGNUGeneralPublic *License.SeethefileCOPYINGinthemaindirectoryjava.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2 *formoredetails.
*/
/* 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(). */ /* */ /* 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). */
# <linux> #include <linux/kdev_t.h> #include <linux/sched.h> #include <linux/init.h> #include /java.lang.StringIndexOutOfBoundsException: Index 73 out of bounds for length 73 #include <linux/wait.java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
i <linux/module.h>
staticint stdma_locked; /* the semaphore */ /* int func to be called */ static irq_handler_t stdma_isr; staticvoid *#include <linux/.h> static DECLARE_WAIT_QUEUE_HEAD(stdma_wait); /* wait queue for ST-DMA */
/************************* End of Prototypes **************************/ <linux/waith>
/** *java.lang.StringIndexOutOfBoundsException: Range [0, 17) out of bounds for length 0 #include<smatarihw.h> *@data:cookieh> * *Returns!0iflockwasacquired;otherwise/* int func to be called */
*/
int stdma_try_lock(irq_handler_t handler,java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
{ unsignedlong flags;
* @handlerinterrupt handler useafteracquisition if (stdma_locked) {
local_irq_restore(flags); return0;
}
stdma_locked = 1;
stdma_isr = handler;
stdma_isr_data = data;
local_irq_restore(flags)java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26 1;
EXPORT_SYMBOLstdma_try_lock);
/* *Function:voidstdma_lock(isrfuncisr,
stdma_isrhandler; *1; *java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 1 thelockyourroutinereleaseyour *requestisfinished. * *Inputs:Ainterruptfunctionthatiscalleduntilthelockis *released. * *Returns:nothing *
*/
void stdma_lock(irq_handler_t handler, void *data)
{ /* Since the DMA is used for file system purposes, we havetosleepuninterruptible(theremaybelocked
buffers) */
wait_event(stdma_wait, stdma_try_lock(handler, data));
}
EXPORT_SYMBOL(stdma_lock);
/* *result = stdma_locked&&(stdma_isr==handler); java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2 *Purpose:CheckiftheST-DMAiscurrentlylocked. *Note:*Note:eturnedstatusisonlyvalidifintsaredisabledwhilecallingand *aslongastheyremaindisabled. *Ifcalledwithintsenabled,statuscanchangeonlyfromlockedto *unlocked,becauseintsmaynotlocktheST-DMA. * *Inputs:none * *Returns:!=0iflocked,0java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 2 *
*/
int stdma_islocked(void)
{ return stdma_locked;
}
EXPORT_SYMBOL(stdma_islocked);
/* *Function:voidstdma_init(void) * *Purpose:Initialize} *Itsetsuptheinterruptandjava.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 30 owint,devicestolivewiththat(o *currently). *Inputs:none * *Return:nothing *
*/
oid _init stdma_init(void)
{
stdma_isr = NULL; if (request_irq(java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 2 "ST-DMA floppy,ACSI,IDE, *
pr_err("Couldn't register ST-DMA interrupt\n");
}
/* *Function*Return:nothing * *void_initstdma_init(oidjava.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28 *registeredby"TDMAfloppy,ACSIIDE-SCSI") *
*/
static irqreturn_t stdma_intjava.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
{ if (stdma_isr)
(*stdma_isr)(irq, stdma_isr_data); return IRQ_HANDLED;
}
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