ppc/xive2: Introduce a XIVE2 core framework

The XIVE2 interrupt controller of the POWER10 processor as the same
logic as on POWER9 but its SW interface has been largely reworked. The
interrupt controller has a new register interface, different BARs,
extra VSDs. These will be described when we add the device model for
the baremetal machine.

The XIVE internal structures for the EAS, END, NVT have different
layouts which is a problem for the current core XIVE framework. To
avoid adding too much complexity in the XIVE models, a new XIVE2 core
framework is introduced. It duplicates the models which are closely
linked to the XIVE internal structures : Xive2Router and
Xive2ENDSource and reuses the XiveSource, XivePresenter, XiveTCTX
models, as they are more generic.

Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>

1 files changed, 78 insertions, 0 deletions

diff --git a/include/hw/ppc/xive2.h b/include/hw/ppc/xive2.h
new file mode 100644
index 0000000..69b2117
--- /dev/null
+++ b/include/hw/ppc/xive2.h
@@ -0,0 +1,78 @@
+/*
+ * QEMU PowerPC XIVE2 interrupt controller model  (POWER10)
+ *
+ * Copyright (c) 2019-2022, IBM Corporation.
+ *
+ * This code is licensed under the GPL version 2 or later. See the
+ * COPYING file in the top-level directory.
+ *
+ */
+
+#ifndef PPC_XIVE2_H
+#define PPC_XIVE2_H
+
+#include "hw/ppc/xive2_regs.h"
+
+/*
+ * XIVE2 Router (POWER10)
+ */
+typedef struct Xive2Router {
+    SysBusDevice    parent;
+
+    XiveFabric *xfb;
+} Xive2Router;
+
+#define TYPE_XIVE2_ROUTER "xive2-router"
+OBJECT_DECLARE_TYPE(Xive2Router, Xive2RouterClass, XIVE2_ROUTER);
+
+typedef struct Xive2RouterClass {
+    SysBusDeviceClass parent;
+
+    /* XIVE table accessors */
+    int (*get_eas)(Xive2Router *xrtr, uint8_t eas_blk, uint32_t eas_idx,
+                   Xive2Eas *eas);
+    int (*get_end)(Xive2Router *xrtr, uint8_t end_blk, uint32_t end_idx,
+                   Xive2End *end);
+    int (*write_end)(Xive2Router *xrtr, uint8_t end_blk, uint32_t end_idx,
+                     Xive2End *end, uint8_t word_number);
+    int (*get_nvp)(Xive2Router *xrtr, uint8_t nvp_blk, uint32_t nvp_idx,
+                   Xive2Nvp *nvp);
+    int (*write_nvp)(Xive2Router *xrtr, uint8_t nvp_blk, uint32_t nvp_idx,
+                     Xive2Nvp *nvp, uint8_t word_number);
+    uint8_t (*get_block_id)(Xive2Router *xrtr);
+} Xive2RouterClass;
+
+int xive2_router_get_eas(Xive2Router *xrtr, uint8_t eas_blk, uint32_t eas_idx,
+                        Xive2Eas *eas);
+int xive2_router_get_end(Xive2Router *xrtr, uint8_t end_blk, uint32_t end_idx,
+                        Xive2End *end);
+int xive2_router_write_end(Xive2Router *xrtr, uint8_t end_blk, uint32_t end_idx,
+                          Xive2End *end, uint8_t word_number);
+int xive2_router_get_nvp(Xive2Router *xrtr, uint8_t nvp_blk, uint32_t nvp_idx,
+                        Xive2Nvp *nvp);
+int xive2_router_write_nvp(Xive2Router *xrtr, uint8_t nvp_blk, uint32_t nvp_idx,
+                          Xive2Nvp *nvp, uint8_t word_number);
+
+void xive2_router_notify(XiveNotifier *xn, uint32_t lisn);
+
+/*
+ * XIVE2 END ESBs  (POWER10)
+ */
+
+#define TYPE_XIVE2_END_SOURCE "xive2-end-source"
+OBJECT_DECLARE_SIMPLE_TYPE(Xive2EndSource, XIVE2_END_SOURCE)
+
+typedef struct Xive2EndSource {
+    DeviceState parent;
+
+    uint32_t        nr_ends;
+
+    /* ESB memory region */
+    uint32_t        esb_shift;
+    MemoryRegion    esb_mmio;
+
+    Xive2Router     *xrtr;
+} Xive2EndSource;
+
+
+#endif /* PPC_XIVE2_H */