patch-2.4.2 linux/drivers/s390/idals.c

• Lines: 48
• Date: Tue Feb 13 14:13:44 2001
• Orig file: v2.4.1/linux/drivers/s390/idals.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.1/linux/drivers/s390/idals.c linux/drivers/s390/idals.c
@@ -0,0 +1,47 @@
+/* 
+   * 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
+   * 12/13/00 changed IDALs to 4kByte-IDALs
+ */
+
+#include <linux/config.h>
+#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) { /* do we really need  '+count'? */
+		cp -> cda = address;
+		return;
+	}
+        nridaws = ((address & 4095L) + count + 4095L) >> 12;
+	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 & -4096L) + 4096;
+		nridaws --;
+        } while ( nridaws > 0 );
+	return;
+}
+#endif