[PATCH v5 05/11] hw/arm: Add two NPCM7xx-based machines

[Havard Skinnemoen <hskinnemoen@google.com>]

This adds two new machines, both supported by OpenBMC:

  - npcm750-evb: Nuvoton NPCM750 Evaluation Board.
  - quanta-gsj: A board with a NPCM730 chip.

They rely on the NPCM7xx SoC device to do the heavy lifting. They are
almost completely identical at the moment, apart from the SoC type,
which currently only changes the reset contents of one register
(GCR.MDLR), but they might grow apart a bit more as more functionality
is added.

Both machines can boot the Linux kernel into /bin/sh.

Reviewed-by: Tyrone Ting <kfting@nuvoton.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Havard Skinnemoen <hskinnemoen@google.com>
---
 default-configs/arm-softmmu.mak |   1 +
 include/hw/arm/npcm7xx.h        |  19 ++++
 hw/arm/npcm7xx_boards.c         | 156 ++++++++++++++++++++++++++++++++
 hw/arm/Makefile.objs            |   2 +-
 4 files changed, 177 insertions(+), 1 deletion(-)
 create mode 100644 hw/arm/npcm7xx_boards.c

diff --git a/default-configs/arm-softmmu.mak b/default-configs/arm-softmmu.mak
index 8fc09a4a51..9a94ebd0be 100644
--- a/default-configs/arm-softmmu.mak
+++ b/default-configs/arm-softmmu.mak
@@ -27,6 +27,7 @@ CONFIG_GUMSTIX=y
 CONFIG_SPITZ=y
 CONFIG_TOSA=y
 CONFIG_Z2=y
+CONFIG_NPCM7XX=y
 CONFIG_COLLIE=y
 CONFIG_ASPEED_SOC=y
 CONFIG_NETDUINO2=y
diff --git a/include/hw/arm/npcm7xx.h b/include/hw/arm/npcm7xx.h
index 95d9224f59..b8b76bc07b 100644
--- a/include/hw/arm/npcm7xx.h
+++ b/include/hw/arm/npcm7xx.h
@@ -35,6 +35,25 @@
 #define NPCM7XX_SMP_BOOTREG_ADDR        (0xf080013c)  /* GCR.SCRPAD */
 #define NPCM7XX_GIC_CPU_IF_ADDR         (0xf03fe100)  /* GIC within A9 */
 
+typedef struct NPCM7xxMachine {
+    MachineState        parent;
+} NPCM7xxMachine;
+
+#define TYPE_NPCM7XX_MACHINE MACHINE_TYPE_NAME("npcm7xx")
+#define NPCM7XX_MACHINE(obj)                                            \
+    OBJECT_CHECK(NPCM7xxMachine, (obj), TYPE_NPCM7XX_MACHINE)
+
+typedef struct NPCM7xxMachineClass {
+    MachineClass        parent;
+
+    const char          *soc_type;
+} NPCM7xxMachineClass;
+
+#define NPCM7XX_MACHINE_CLASS(klass)                                    \
+    OBJECT_CLASS_CHECK(NPCM7xxMachineClass, (klass), TYPE_NPCM7XX_MACHINE)
+#define NPCM7XX_MACHINE_GET_CLASS(obj)                                  \
+    OBJECT_GET_CLASS(NPCM7xxMachineClass, (obj), TYPE_NPCM7XX_MACHINE)
+
 typedef struct NPCM7xxState {
     DeviceState         parent;
 
diff --git a/hw/arm/npcm7xx_boards.c b/hw/arm/npcm7xx_boards.c
new file mode 100644
index 0000000000..d78d9f991b
--- /dev/null
+++ b/hw/arm/npcm7xx_boards.c
@@ -0,0 +1,156 @@
+/*
+ * Machine definitions for boards featuring an NPCM7xx SoC.
+ *
+ * Copyright 2020 Google LLC
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#include "qemu/osdep.h"
+
+#include "hw/arm/boot.h"
+#include "hw/arm/npcm7xx.h"
+#include "hw/core/cpu.h"
+#include "qapi/error.h"
+#include "qemu/units.h"
+
+#define NPCM750_EVB_POWER_ON_STRAPS 0x00001ff7
+#define QUANTA_GSJ_POWER_ON_STRAPS 0x00001fff
+
+static struct arm_boot_info npcm7xx_binfo = {
+    .loader_start       = NPCM7XX_LOADER_START,
+    .smp_loader_start   = NPCM7XX_SMP_LOADER_START,
+    .smp_bootreg_addr   = NPCM7XX_SMP_BOOTREG_ADDR,
+    .gic_cpu_if_addr    = NPCM7XX_GIC_CPU_IF_ADDR,
+    .write_secondary_boot = npcm7xx_write_secondary_boot,
+    .board_id           = -1,
+};
+
+static void npcm7xx_load_kernel(MachineState *machine, NPCM7xxState *soc)
+{
+    NPCM7xxClass *sc = NPCM7XX_GET_CLASS(soc);
+
+    npcm7xx_binfo.ram_size = machine->ram_size;
+    npcm7xx_binfo.nb_cpus = sc->num_cpus;
+
+    arm_load_kernel(&soc->cpu[0], machine, &npcm7xx_binfo);
+}
+
+static void npcm7xx_connect_dram(NPCM7xxState *soc, MemoryRegion *dram)
+{
+    memory_region_add_subregion(get_system_memory(), NPCM7XX_DRAM_BA, dram);
+
+    object_property_set_link(OBJECT(soc), OBJECT(dram), "dram-mr",
+                             &error_abort);
+}
+
+static NPCM7xxState *npcm7xx_create_soc(MachineState *machine,
+                                        uint32_t hw_straps)
+{
+    NPCM7xxMachineClass *nmc = NPCM7XX_MACHINE_GET_CLASS(machine);
+    Object *obj;
+
+    obj = object_new_with_props(nmc->soc_type, OBJECT(machine), "soc",
+                                &error_abort, NULL);
+    object_property_set_uint(obj, hw_straps, "power-on-straps", &error_abort);
+
+    return NPCM7XX(obj);
+}
+
+static void npcm750_evb_init(MachineState *machine)
+{
+    NPCM7xxState *soc;
+
+    soc = npcm7xx_create_soc(machine, NPCM750_EVB_POWER_ON_STRAPS);
+    npcm7xx_connect_dram(soc, machine->ram);
+    qdev_realize(DEVICE(soc), NULL, &error_abort);
+
+    npcm7xx_load_kernel(machine, soc);
+}
+
+static void quanta_gsj_init(MachineState *machine)
+{
+    NPCM7xxState *soc;
+
+    soc = npcm7xx_create_soc(machine, QUANTA_GSJ_POWER_ON_STRAPS);
+    npcm7xx_connect_dram(soc, machine->ram);
+    qdev_realize(DEVICE(soc), NULL, &error_abort);
+
+    npcm7xx_load_kernel(machine, soc);
+}
+
+static void npcm7xx_set_soc_type(NPCM7xxMachineClass *nmc, const char *type)
+{
+    NPCM7xxClass *sc = NPCM7XX_CLASS(object_class_by_name(type));
+    MachineClass *mc = MACHINE_CLASS(nmc);
+
+    nmc->soc_type = type;
+    mc->default_cpus = mc->min_cpus = mc->max_cpus = sc->num_cpus;
+}
+
+static void npcm7xx_machine_class_init(ObjectClass *oc, void *data)
+{
+    MachineClass *mc = MACHINE_CLASS(oc);
+
+    mc->no_floppy       = 1;
+    mc->no_cdrom        = 1;
+    mc->no_parallel     = 1;
+    mc->default_ram_id  = "ram";
+}
+
+/*
+ * Schematics:
+ * https://github.com/Nuvoton-Israel/nuvoton-info/blob/master/npcm7xx-poleg/evaluation-board/board_deliverables/NPCM750x_EB_ver.A1.1_COMPLETE.pdf
+ */
+static void npcm750_evb_machine_class_init(ObjectClass *oc, void *data)
+{
+    NPCM7xxMachineClass *nmc = NPCM7XX_MACHINE_CLASS(oc);
+    MachineClass *mc = MACHINE_CLASS(oc);
+
+    npcm7xx_set_soc_type(nmc, TYPE_NPCM750);
+
+    mc->desc            = "Nuvoton NPCM750 Evaluation Board (Cortex A9)";
+    mc->init            = npcm750_evb_init;
+    mc->default_ram_size = 512 * MiB;
+};
+
+static void gsj_machine_class_init(ObjectClass *oc, void *data)
+{
+    NPCM7xxMachineClass *nmc = NPCM7XX_MACHINE_CLASS(oc);
+    MachineClass *mc = MACHINE_CLASS(oc);
+
+    npcm7xx_set_soc_type(nmc, TYPE_NPCM730);
+
+    mc->desc            = "Quanta GSJ (Cortex A9)";
+    mc->init            = quanta_gsj_init;
+    mc->default_ram_size = 512 * MiB;
+};
+
+static const TypeInfo npcm7xx_machine_types[] = {
+    {
+        .name           = TYPE_NPCM7XX_MACHINE,
+        .parent         = TYPE_MACHINE,
+        .instance_size  = sizeof(NPCM7xxMachine),
+        .class_size     = sizeof(NPCM7xxMachineClass),
+        .class_init     = npcm7xx_machine_class_init,
+        .abstract       = true,
+    }, {
+        .name           = MACHINE_TYPE_NAME("npcm750-evb"),
+        .parent         = TYPE_NPCM7XX_MACHINE,
+        .class_init     = npcm750_evb_machine_class_init,
+    }, {
+        .name           = MACHINE_TYPE_NAME("quanta-gsj"),
+        .parent         = TYPE_NPCM7XX_MACHINE,
+        .class_init     = gsj_machine_class_init,
+    },
+};
+
+DEFINE_TYPES(npcm7xx_machine_types)
diff --git a/hw/arm/Makefile.objs b/hw/arm/Makefile.objs
index 13d163a599..c333548ce1 100644
--- a/hw/arm/Makefile.objs
+++ b/hw/arm/Makefile.objs
@@ -41,7 +41,7 @@ obj-$(CONFIG_STM32F205_SOC) += stm32f205_soc.o
 obj-$(CONFIG_STM32F405_SOC) += stm32f405_soc.o
 obj-$(CONFIG_XLNX_ZYNQMP_ARM) += xlnx-zynqmp.o xlnx-zcu102.o
 obj-$(CONFIG_XLNX_VERSAL) += xlnx-versal.o xlnx-versal-virt.o
-obj-$(CONFIG_NPCM7XX) += npcm7xx.o
+obj-$(CONFIG_NPCM7XX) += npcm7xx.o npcm7xx_boards.o
 obj-$(CONFIG_FSL_IMX25) += fsl-imx25.o imx25_pdk.o
 obj-$(CONFIG_FSL_IMX31) += fsl-imx31.o kzm.o
 obj-$(CONFIG_FSL_IMX6) += fsl-imx6.o
-- 
2.27.0.383.g050319c2ae-goog