[PATCH 2/2] hw/arm: Add nucleo-g071rb board

[Felipe Balbi <balbi@kernel.org>]

From: Felipe Balbi <felipe@balbi.sh>

This board is based around STM32G071RB SoC, a Cortex-M0 based
device. More information can be found at:

https://www.st.com/en/product/nucleo-g071rb.html

Signed-off-by: Felipe Balbi <felipe@balbi.sh>
---
 hw/arm/Kconfig         |  6 ++++
 hw/arm/meson.build     |  1 +
 hw/arm/nucleo-g071rb.c | 70 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 77 insertions(+)
 create mode 100644 hw/arm/nucleo-g071rb.c

diff --git a/hw/arm/Kconfig b/hw/arm/Kconfig
index 28a46d2b1ad3..5938bb8208a1 100644
--- a/hw/arm/Kconfig
+++ b/hw/arm/Kconfig
@@ -310,6 +310,12 @@ config STM32VLDISCOVERY
     depends on TCG && ARM
     select STM32F100_SOC
 
+config NUCLEO_G071RB
+    bool
+    default y
+    depends on TCG && ARM
+    select STM32G000_SOC
+
 config STRONGARM
     bool
     select PXA2XX
diff --git a/hw/arm/meson.build b/hw/arm/meson.build
index 9c4137a988e1..580c2d55fc3f 100644
--- a/hw/arm/meson.build
+++ b/hw/arm/meson.build
@@ -18,6 +18,7 @@ arm_ss.add(when: 'CONFIG_REALVIEW', if_true: files('realview.c'))
 arm_ss.add(when: 'CONFIG_SBSA_REF', if_true: files('sbsa-ref.c'))
 arm_ss.add(when: 'CONFIG_STELLARIS', if_true: files('stellaris.c'))
 arm_ss.add(when: 'CONFIG_STM32VLDISCOVERY', if_true: files('stm32vldiscovery.c'))
+arm_ss.add(when: 'CONFIG_NUCLEO_G071RB', if_true: files('nucleo-g071rb.c'))
 arm_ss.add(when: 'CONFIG_ZYNQ', if_true: files('xilinx_zynq.c'))
 arm_ss.add(when: 'CONFIG_SABRELITE', if_true: files('sabrelite.c'))
 
diff --git a/hw/arm/nucleo-g071rb.c b/hw/arm/nucleo-g071rb.c
new file mode 100644
index 000000000000..580b52bacf2c
--- /dev/null
+++ b/hw/arm/nucleo-g071rb.c
@@ -0,0 +1,70 @@
+/*
+ * ST Nucleo G071RB
+ *
+ * Copyright (c) 2024 Felipe Balbi <felipe@balbi.sh>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "hw/boards.h"
+#include "hw/qdev-properties.h"
+#include "hw/qdev-clock.h"
+#include "qemu/error-report.h"
+#include "hw/arm/stm32g000_soc.h"
+#include "hw/arm/boot.h"
+
+/* nucleo_g071rb implementation is derived from olimex-stm32-h405.c */
+
+/* Main SYSCLK frequency in Hz (48MHz) */
+#define SYSCLK_FRQ 48000000ULL
+
+static void nucleo_g071rb_init(MachineState *machine)
+{
+    DeviceState *dev;
+    Clock *sysclk;
+
+    /* This clock doesn't need migration because it is fixed-frequency */
+    sysclk = clock_new(OBJECT(machine), "SYSCLK");
+    clock_set_hz(sysclk, SYSCLK_FRQ);
+
+    dev = qdev_new(TYPE_STM32G000_SOC);
+    object_property_add_child(OBJECT(machine), "soc", OBJECT(dev));
+    qdev_connect_clock_in(dev, "sysclk", sysclk);
+    sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
+
+    armv7m_load_kernel(ARM_CPU(first_cpu),
+                       machine->kernel_filename,
+                       0, FLASH_SIZE);
+}
+
+static void nucleo_g071rb_machine_init(MachineClass *mc)
+{
+    static const char * const valid_cpu_types[] = {
+        ARM_CPU_TYPE_NAME("cortex-m0"),
+        NULL
+    };
+
+    mc->desc = "ST Nucleo-G071RB (Cortex-M0)";
+    mc->init = nucleo_g071rb_init;
+    mc->valid_cpu_types = valid_cpu_types;
+}
+
+DEFINE_MACHINE("nucleo-g071rb", nucleo_g071rb_machine_init)
-- 
2.44.0