[RFC PATCH 08/18] hw/arm/arm_cpus: add arm_cpus device

[Damien Hedde]

This object can be used to create a group of homogeneous
arm cpus.

Signed-off-by: Damien Hedde <damien.hedde@greensocs.com>
---
 include/hw/arm/arm_cpus.h | 45 ++++++++++++++++++++++++++++
 hw/arm/arm_cpus.c         | 63 +++++++++++++++++++++++++++++++++++++++
 hw/arm/meson.build        |  1 +
 3 files changed, 109 insertions(+)
 create mode 100644 include/hw/arm/arm_cpus.h
 create mode 100644 hw/arm/arm_cpus.c

diff --git a/include/hw/arm/arm_cpus.h b/include/hw/arm/arm_cpus.h
new file mode 100644
index 0000000000..8c540d9853
--- /dev/null
+++ b/include/hw/arm/arm_cpus.h
@@ -0,0 +1,45 @@
+/*
+ * ARM CPUs
+ *
+ * Copyright (c) 2022 Greensocs
+ *
+ * This work is licensed under the terms of the GNU GPLv2 or later.
+ * See the COPYING file in the top-level directory.
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef HW_ARM_CPUS_H
+#define HW_ARM_CPUS_H
+
+#include "hw/cpu/cpus.h"
+#include "target/arm/cpu.h"
+
+#define TYPE_ARM_CPUS "arm-cpus"
+OBJECT_DECLARE_SIMPLE_TYPE(ArmCpusState, ARM_CPUS)
+
+/**
+ * ArmCpusState:
+ * @reset_hivecs: use to initialize cpu's reset-hivecs
+ * @has_el3: use to initialize cpu's has_el3
+ * @has_el2: use to initialize cpu's has_el2
+ * @reset_cbar: use to initialize cpu's reset-cbar
+ */
+struct ArmCpusState {
+    CpusState parent_obj;
+
+    bool reset_hivecs;
+    bool has_el3;
+    bool has_el2;
+    uint64_t reset_cbar;
+};
+
+/*
+ * arm_cpus_get_cpu:
+ * Helper to get an ArmCpu from the container.
+ */
+static inline ARMCPU *arm_cpus_get_cpu(ArmCpusState *s, unsigned i)
+{
+    return ARM_CPU(CPUS(s)->cpus[i]);
+}
+
+#endif /* HW_ARM_CPUS_H */
diff --git a/hw/arm/arm_cpus.c b/hw/arm/arm_cpus.c
new file mode 100644
index 0000000000..ed6483f45b
--- /dev/null
+++ b/hw/arm/arm_cpus.c
@@ -0,0 +1,63 @@
+/*
+ * ARM CPUs
+ *
+ * Copyright (c) 2022 Greensocs
+ *
+ * This work is licensed under the terms of the GNU GPLv2 or later.
+ * See the COPYING file in the top-level directory.
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "hw/arm/arm_cpus.h"
+#include "hw/cpu/cpus.h"
+#include "hw/qdev-properties.h"
+#include "cpu.h"
+
+static Property arm_cpus_props[] = {
+    /* FIXME: get the default values from the arm cpu object */
+    DEFINE_PROP_BOOL("reset-hivecs", ArmCpusState, reset_hivecs, false),
+    DEFINE_PROP_BOOL("has_el3", ArmCpusState, has_el3, false),
+    DEFINE_PROP_BOOL("has_el2", ArmCpusState, has_el2, false),
+    DEFINE_PROP_UINT64("reset-cbar", ArmCpusState, reset_cbar, 0),
+    DEFINE_PROP_END_OF_LIST()
+};
+
+static void arm_cpus_configure_cpu(CpusState *base, CPUState *cpu,
+                                   unsigned i)
+{
+    ArmCpusState *s = ARM_CPUS(base);
+    DeviceState *cpudev = DEVICE(cpu);
+
+    qdev_prop_set_uint32(cpudev, "core-count", base->topology.cpus);
+    qdev_prop_set_bit(cpudev, "reset-hivecs", s->reset_hivecs);
+    qdev_prop_set_bit(cpudev, "has_el3", s->has_el3);
+    qdev_prop_set_bit(cpudev, "has_el2", s->has_el2);
+    qdev_prop_set_uint64(cpudev, "reset-cbar", s->reset_cbar);
+}
+
+static void arm_cpus_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    CpusClass *cc = CPUS_CLASS(klass);
+
+    device_class_set_props(dc, arm_cpus_props);
+
+    cc->configure_cpu = arm_cpus_configure_cpu;
+    cc->base_cpu_type = TYPE_ARM_CPU;
+}
+
+static const TypeInfo arm_cpus_info = {
+    .name              = TYPE_ARM_CPUS,
+    .parent            = TYPE_CPUS,
+    .instance_size     = sizeof(ArmCpusState),
+    .class_init        = arm_cpus_class_init,
+};
+
+static void arm_cpus_register_types(void)
+{
+    type_register_static(&arm_cpus_info);
+}
+
+type_init(arm_cpus_register_types)
diff --git a/hw/arm/meson.build b/hw/arm/meson.build
index 721a8eb8be..feeb301c09 100644
--- a/hw/arm/meson.build
+++ b/hw/arm/meson.build
@@ -58,5 +58,6 @@ arm_ss.add(when: 'CONFIG_FSL_IMX7', if_true: 
files('fsl-imx7.c', 'mcimx7d-sabre.
 arm_ss.add(when: 'CONFIG_ARM_SMMUV3', if_true: files('smmu-common.c', 
'smmuv3.c'))
 arm_ss.add(when: 'CONFIG_FSL_IMX6UL', if_true: files('fsl-imx6ul.c', 
'mcimx6ul-evk.c'))
 arm_ss.add(when: 'CONFIG_NRF51_SOC', if_true: files('nrf51_soc.c'))
+arm_ss.add(files('arm_cpus.c'))
 
 hw_arch += {'arm': arm_ss}
-- 
2.35.1