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/*
* File...........: linux/drivers/s390x/idals.c
* Author(s)......: Holger Smolinski <Holger.Smolinski@de.ibm.com>
* Bugreports.to..: <Linux390@de.ibm.com>
* (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 2000a
* History of changes
* 07/24/00 new file
*/
#include <linux/malloc.h>
#include <asm/irq.h>
#include <asm/idals.h>
#ifdef CONFIG_ARCH_S390X
void
set_normalized_cda ( ccw1_t * cp, unsigned long address )
{
int nridaws;
idaw_t *idal;
int count = cp->count;
if (cp->flags & CCW_FLAG_IDA)
BUG();
if (((address + count) >> 31) == 0)
cp -> cda = address;
return;
nridaws = ((address & 2047L) + count + 2047L) >> 11;
idal = idal_alloc(nridaws);
if ( idal == NULL ) {
/* probably we should have a fallback here */
panic ("Cannot allocate memory for IDAL\n");
}
cp->flags |= CCW_FLAG_IDA;
cp->cda = (__u32)(unsigned long)(idaw_t *)idal;
do {
*idal++ = address;
address = (address & -2048L) + 2048;
nridaws --;
} while ( nridaws > 0 );
return;
}
#endif
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