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authorCornelia Huck <cornelia.huck@de.ibm.com>2013-01-24 02:28:03 +0000
committerAlexander Graf <agraf@suse.de>2013-01-29 21:50:04 +0100
commitdb1c8f53bfb1b3bff4f904be4f929808a445522e (patch)
treef22324e267b782ad3a4a70fb784c8b0a2820f0b0 /target-s390x/ioinst.c
parent38322ed6518817066ce3a9037fd3795af57e1cdd (diff)
s390: Channel I/O basic definitions.
Basic channel I/O structures and helper function. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'target-s390x/ioinst.c')
-rw-r--r--target-s390x/ioinst.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/target-s390x/ioinst.c b/target-s390x/ioinst.c
new file mode 100644
index 0000000000..06a16eec0a
--- /dev/null
+++ b/target-s390x/ioinst.c
@@ -0,0 +1,36 @@
+/*
+ * I/O instructions for S/390
+ *
+ * Copyright 2012 IBM Corp.
+ * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+
+#include <sys/types.h>
+
+#include "cpu.h"
+#include "ioinst.h"
+
+int ioinst_disassemble_sch_ident(uint32_t value, int *m, int *cssid, int *ssid,
+ int *schid)
+{
+ if (!IOINST_SCHID_ONE(value)) {
+ return -EINVAL;
+ }
+ if (!IOINST_SCHID_M(value)) {
+ if (IOINST_SCHID_CSSID(value)) {
+ return -EINVAL;
+ }
+ *cssid = 0;
+ *m = 0;
+ } else {
+ *cssid = IOINST_SCHID_CSSID(value);
+ *m = 1;
+ }
+ *ssid = IOINST_SCHID_SSID(value);
+ *schid = IOINST_SCHID_NR(value);
+ return 0;
+}