1 files changed, 62 insertions, 0 deletions
diff --git a/include/hw/ppc/xive_regs.h b/include/hw/ppc/xive_regs.h
new file mode 100644
index 0000000000..e1193fb3e4
--- /dev/null
+++ b/include/hw/ppc/xive_regs.h
@@ -0,0 +1,62 @@
+/*
+ * QEMU PowerPC XIVE internal structure definitions
+ *
+ *
+ * The XIVE structures are accessed by the HW and their format is
+ * architected to be big-endian. Some macros are provided to ease
+ * access to the different fields.
+ *
+ *
+ * Copyright (c) 2016-2018, IBM Corporation.
+ *
+ * This code is licensed under the GPL version 2 or later. See the
+ * COPYING file in the top-level directory.
+ */
+
+#ifndef PPC_XIVE_REGS_H
+#define PPC_XIVE_REGS_H
+
+/*
+ * Interrupt source number encoding on PowerBUS
+ */
+#define XIVE_SRCNO_BLOCK(srcno) (((srcno) >> 28) & 0xf)
+#define XIVE_SRCNO_INDEX(srcno) ((srcno) & 0x0fffffff)
+#define XIVE_SRCNO(blk, idx)    ((uint32_t)(blk) << 28 | (idx))
+
+/*
+ * EAS (Event Assignment Structure)
+ *
+ * One per interrupt source. Targets an interrupt to a given Event
+ * Notification Descriptor (END) and provides the corresponding
+ * logical interrupt number (END data)
+ */
+typedef struct XiveEAS {
+        /*
+         * Use a single 64-bit definition to make it easier to perform
+         * atomic updates
+         */
+        uint64_t        w;
+#define EAS_VALID       PPC_BIT(0)
+#define EAS_END_BLOCK   PPC_BITMASK(4, 7)        /* Destination END block# */
+#define EAS_END_INDEX   PPC_BITMASK(8, 31)       /* Destination END index */
+#define EAS_MASKED      PPC_BIT(32)              /* Masked */
+#define EAS_END_DATA    PPC_BITMASK(33, 63)      /* Data written to the END */
+} XiveEAS;
+
+#define xive_eas_is_valid(eas)   (be64_to_cpu((eas)->w) & EAS_VALID)
+#define xive_eas_is_masked(eas)  (be64_to_cpu((eas)->w) & EAS_MASKED)
+
+static inline uint64_t xive_get_field64(uint64_t mask, uint64_t word)
+{
+    return (be64_to_cpu(word) & mask) >> ctz64(mask);
+}
+
+static inline uint64_t xive_set_field64(uint64_t mask, uint64_t word,
+                                        uint64_t value)
+{
+    uint64_t tmp =
+        (be64_to_cpu(word) & ~mask) | ((value << ctz64(mask)) & mask);
+    return cpu_to_be64(tmp);
+}
+
+#endif /* PPC_XIVE_REGS_H */