1 files changed, 96 insertions, 0 deletions
diff --git a/target/s390x/cpu_features.h b/target/s390x/cpu_features.h
new file mode 100644
index 000000000..87463f064
--- /dev/null
+++ b/target/s390x/cpu_features.h
@@ -0,0 +1,96 @@
+/*
+ * CPU features/facilities helper structs and utility functions for s390
+ *
+ * Copyright 2016 IBM Corp.
+ *
+ * Author(s): Michael Mueller <mimu@linux.vnet.ibm.com>
+ *            David Hildenbrand <dahi@linux.vnet.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.
+ */
+
+#ifndef TARGET_S390X_CPU_FEATURES_H
+#define TARGET_S390X_CPU_FEATURES_H
+
+#include "qemu/bitmap.h"
+#include "cpu_features_def.h"
+#include "target/s390x/gen-features.h"
+
+/* CPU features are announced via different ways */
+typedef enum {
+    S390_FEAT_TYPE_STFL,
+    S390_FEAT_TYPE_SCLP_CONF_CHAR,
+    S390_FEAT_TYPE_SCLP_CONF_CHAR_EXT,
+    S390_FEAT_TYPE_SCLP_FAC134,
+    S390_FEAT_TYPE_SCLP_CPU,
+    S390_FEAT_TYPE_MISC,
+    S390_FEAT_TYPE_PLO,
+    S390_FEAT_TYPE_PTFF,
+    S390_FEAT_TYPE_KMAC,
+    S390_FEAT_TYPE_KMC,
+    S390_FEAT_TYPE_KM,
+    S390_FEAT_TYPE_KIMD,
+    S390_FEAT_TYPE_KLMD,
+    S390_FEAT_TYPE_PCKMO,
+    S390_FEAT_TYPE_KMCTR,
+    S390_FEAT_TYPE_KMF,
+    S390_FEAT_TYPE_KMO,
+    S390_FEAT_TYPE_PCC,
+    S390_FEAT_TYPE_PPNO,
+    S390_FEAT_TYPE_KMA,
+    S390_FEAT_TYPE_KDSA,
+    S390_FEAT_TYPE_SORTL,
+    S390_FEAT_TYPE_DFLTCC,
+} S390FeatType;
+
+/* Definition of a CPU feature */
+typedef struct {
+    const char *name;       /* name exposed to the user */
+    const char *desc;       /* description exposed to the user */
+    S390FeatType type;      /* feature type (way of indication)*/
+    int bit;                /* bit within the feature type area (fixed) */
+} S390FeatDef;
+
+/* use ordinary bitmap operations to work with features */
+typedef unsigned long S390FeatBitmap[BITS_TO_LONGS(S390_FEAT_MAX)];
+
+/* 64bit based bitmap used to init S390FeatBitmap from generated data */
+typedef uint64_t S390FeatInit[S390_FEAT_MAX / 64 + 1];
+
+const S390FeatDef *s390_feat_def(S390Feat feat);
+S390Feat s390_feat_by_type_and_bit(S390FeatType type, int bit);
+void s390_init_feat_bitmap(const S390FeatInit init, S390FeatBitmap bitmap);
+void s390_fill_feat_block(const S390FeatBitmap features, S390FeatType type,
+                          uint8_t *data);
+void s390_add_from_feat_block(S390FeatBitmap features, S390FeatType type,
+                          uint8_t *data);
+void s390_feat_bitmap_to_ascii(const S390FeatBitmap features, void *opaque,
+                               void (*fn)(const char *name, void *opaque));
+
+/* Definition of a CPU feature group */
+typedef struct {
+    const char *name;       /* name exposed to the user */
+    const char *desc;       /* description exposed to the user */
+    S390FeatBitmap feat;    /* features contained in the group */
+    S390FeatInit init;      /* used to init feat from generated data */
+} S390FeatGroupDef;
+
+const S390FeatGroupDef *s390_feat_group_def(S390FeatGroup group);
+
+#define BE_BIT_NR(BIT) (BIT ^ (BITS_PER_LONG - 1))
+
+static inline void clear_be_bit(unsigned int bit_nr, uint8_t *array)
+{
+    array[bit_nr / 8] &= ~(0x80 >> (bit_nr % 8));
+}
+static inline void set_be_bit(unsigned int bit_nr, uint8_t *array)
+{
+    array[bit_nr / 8] |= 0x80 >> (bit_nr % 8);
+}
+static inline bool test_be_bit(unsigned int bit_nr, const uint8_t *array)
+{
+    return array[bit_nr / 8] & (0x80 >> (bit_nr % 8));
+}
+#endif /* TARGET_S390X_CPU_FEATURES_H */