+} PnvN1Chiplet;
+#endif /*PPC_PNV_N1_CHIPLET_H */
diff --git a/include/hw/ppc/pnv_xscom.h b/include/hw/ppc/pnv_xscom.h
index 3e15706dec..535ae1dab0 100644
--- a/include/hw/ppc/pnv_xscom.h
+++ b/include/hw/ppc/pnv_xscom.h
@@ -173,6 +173,12 @@ struct PnvXScomInterfaceClass {
#define PNV10_XSCOM_N1_CHIPLET_CTRL_REGS_BASE 0x3000000
#define PNV10_XSCOM_CHIPLET_CTRL_REGS_SIZE 0x400
+#define PNV10_XSCOM_N1_PB_SCOM_EQ_BASE 0x3011000
+#define PNV10_XSCOM_N1_PB_SCOM_EQ_SIZE 0x200
+
+#define PNV10_XSCOM_N1_PB_SCOM_ES_BASE 0x3011300
+#define PNV10_XSCOM_N1_PB_SCOM_ES_SIZE 0x100
+
#define PNV10_XSCOM_PEC_NEST_BASE 0x3011800 /* index goes
downwards ... */
#define PNV10_XSCOM_PEC_NEST_SIZE 0x100
diff --git a/hw/ppc/pnv_n1_chiplet.c b/hw/ppc/pnv_n1_chiplet.c
new file mode 100644
index 0000000000..8e4c21dbf6
--- /dev/null
+++ b/hw/ppc/pnv_n1_chiplet.c
@@ -0,0 +1,171 @@
+/*
+ * QEMU PowerPC N1 chiplet model
+ *
+ * Copyright (c) 2023, IBM Corporation.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This code is licensed under the GPL version 2 or later. See the
+ * COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/log.h"
+#include "hw/qdev-properties.h"
+#include "hw/ppc/pnv.h"
+#include "hw/ppc/pnv_xscom.h"
+#include "hw/ppc/pnv_n1_chiplet.h"
+#include "hw/ppc/pnv_nest_pervasive.h"
+
+/*
+ * The n1 chiplet contains chiplet control unit,
+ * PowerBus/RaceTrack/Bridge logic, nest Memory Management Unit(nMMU)
+ * and more.
+ *
+ * In this model Nest1 chiplet control registers are modelled via
common
+ * nest pervasive model and few PowerBus racetrack registers are
modelled.
+ */
+
+#define PB_SCOM_EQ0_HP_MODE2_CURR 0xe
+#define PB_SCOM_ES3_MODE 0x8a
+
+static uint64_t pnv_n1_chiplet_pb_scom_eq_read(void *opaque, hwaddr
addr,
+ unsigned size)
+{
+ PnvN1Chiplet *n1_chiplet = PNV_N1_CHIPLET(opaque);
+ int reg = addr >> 3;
+ uint64_t val = ~0ull;
+
+ switch (reg) {
+ case PB_SCOM_EQ0_HP_MODE2_CURR:
+ val = n1_chiplet->eq[0].hp_mode2_curr;
+ break;
+ default:
+ qemu_log_mask(LOG_UNIMP, "%s: Invalid xscom read at 0x%"
PRIx32 "\n",
+ __func__, reg);
+ }
+ return val;
+}
+
+static void pnv_n1_chiplet_pb_scom_eq_write(void *opaque, hwaddr addr,
+ uint64_t val,
unsigned size)
+{
+ PnvN1Chiplet *n1_chiplet = PNV_N1_CHIPLET(opaque);
+ int reg = addr >> 3;
+
+ switch (reg) {
+ case PB_SCOM_EQ0_HP_MODE2_CURR:
+ n1_chiplet->eq[0].hp_mode2_curr = val;
+ break;
+ default:
+ qemu_log_mask(LOG_UNIMP, "%s: Invalid xscom write at 0x%"
PRIx32 "\n",
+ __func__, reg);
+ }
+}
+
+static const MemoryRegionOps pnv_n1_chiplet_pb_scom_eq_ops = {
+ .read = pnv_n1_chiplet_pb_scom_eq_read,
+ .write = pnv_n1_chiplet_pb_scom_eq_write,
+ .valid.min_access_size = 8,
+ .valid.max_access_size = 8,
+ .impl.min_access_size = 8,
+ .impl.max_access_size = 8,
+ .endianness = DEVICE_BIG_ENDIAN,
+};
+
+static uint64_t pnv_n1_chiplet_pb_scom_es_read(void *opaque, hwaddr
addr,
+ unsigned size)
+{
+ PnvN1Chiplet *n1_chiplet = PNV_N1_CHIPLET(opaque);
+ int reg = addr >> 3;
+ uint64_t val = ~0ull;
+
+ switch (reg) {
+ case PB_SCOM_ES3_MODE:
+ val = n1_chiplet->es[3].mode;
+ break;
+ default:
+ qemu_log_mask(LOG_UNIMP, "%s: Invalid xscom read at 0x%"
PRIx32 "\n",
+ __func__, reg);
+ }
+ return val;
+}
+
+static void pnv_n1_chiplet_pb_scom_es_write(void *opaque, hwaddr addr,
+ uint64_t val,
unsigned size)
+{
+ PnvN1Chiplet *n1_chiplet = PNV_N1_CHIPLET(opaque);
+ int reg = addr >> 3;
+
+ switch (reg) {
+ case PB_SCOM_ES3_MODE:
+ n1_chiplet->es[3].mode = val;
+ break;
+ default:
+ qemu_log_mask(LOG_UNIMP, "%s: Invalid xscom write at 0x%"
PRIx32 "\n",
+ __func__, reg);
+ }
+}
+
+static const MemoryRegionOps pnv_n1_chiplet_pb_scom_es_ops = {
+ .read = pnv_n1_chiplet_pb_scom_es_read,
+ .write = pnv_n1_chiplet_pb_scom_es_write,
+ .valid.min_access_size = 8,
+ .valid.max_access_size = 8,
+ .impl.min_access_size = 8,
+ .impl.max_access_size = 8,
+ .endianness = DEVICE_BIG_ENDIAN,
+};
+
+static void pnv_n1_chiplet_realize(DeviceState *dev, Error **errp)
+{
+ PnvN1Chiplet *n1_chiplet = PNV_N1_CHIPLET(dev);
+
+ /* Initialize and realize nest pervasive common chiplet model */
+ object_initialize_child(OBJECT(n1_chiplet),
"nest_pervasive_common",
+ &n1_chiplet->nest_pervasive,
+ TYPE_PNV_NEST_PERVASIVE);