patch-2.4.2 linux/include/asm-s390x/idals.h

• Lines: 58
• Date: Tue Feb 13 14:13:44 2001
• Orig file: v2.4.1/linux/include/asm-s390x/idals.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.1/linux/include/asm-s390x/idals.h linux/include/asm-s390x/idals.h
@@ -0,0 +1,57 @@
+/* 
+   * File...........: linux/include/asm-s390x/idals.h
+   * 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/config.h>
+#include <asm/irq.h>
+
+typedef unsigned long idaw_t;
+
+static inline idaw_t *
+idal_alloc ( int nridaws )
+{
+	if ( nridaws > 33 )
+		BUG();
+	return kmalloc(nridaws * sizeof(idaw_t), GFP_ATOMIC | GFP_DMA );
+}
+
+static inline void 
+idal_free ( idaw_t *idal )
+{
+	kfree (idal);
+}
+
+/*
+ * Function: set_normalized_cda
+ * sets the address of the data in CCW
+ * if necessary it allocates an IDAL and sets sthe appropriate flags
+ */
+#if defined (CONFIG_ARCH_S390X)
+extern void set_normalized_cda(ccw1_t * ccw, unsigned long address);
+#else
+static inline void
+set_normalized_cda(ccw1_t * ccw, unsigned long address)
+{
+	ccw->cda = address;
+}
+#endif
+
+/*
+ * Function: clear_normalized_cda
+ * releases any allocated IDAL related to the CCW
+ */
+static inline void
+clear_normalized_cda ( ccw1_t * ccw ) 
+{
+	if ( ccw -> flags & CCW_FLAG_IDA ) {
+		idal_free ( (idaw_t *)(unsigned long) (ccw -> cda ));
+		ccw -> flags &= ~CCW_FLAG_IDA;
+	}
+	ccw -> cda = 0;
+}
+