libqos: add ARM n800 machine object

This is used to test omap_i2c.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

tests/Makefile.include

@@ -711,6 +711,7 @@ qos-test-obj-y += tests/libqos/virtio-serial.o
 
 # Machines
 qos-test-obj-y += tests/libqos/aarch64-xlnx-zcu102-machine.o
+qos-test-obj-y += tests/libqos/arm-n800-machine.o
 qos-test-obj-y += tests/libqos/arm-raspi2-machine.o
 qos-test-obj-y += tests/libqos/arm-sabrelite-machine.o
 qos-test-obj-y += tests/libqos/arm-smdkc210-machine.o

tests/libqos/arm-n800-machine.c

+/*
+ * libqos driver framework
+ *
+ * Copyright (c) 2019 Red Hat, Inc.
+ *
+ * Author: Paolo Bonzini <pbonzini@redhat.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2 as published by the Free Software Foundation.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>
+ */
+
+#include "qemu/osdep.h"
+#include "libqtest.h"
+#include "libqos/malloc.h"
+#include "libqos/qgraph.h"
+#include "libqos/i2c.h"
+
+#define ARM_PAGE_SIZE            4096
+#define N800_RAM_START      0x80000000
+#define N800_RAM_END        0x88000000
+
+typedef struct QN800Machine QN800Machine;
+
+struct QN800Machine {
+    QOSGraphObject obj;
+    QGuestAllocator alloc;
+    OMAPI2C i2c_1;
+};
+
+static void *n800_get_driver(void *object, const char *interface)
+{
+    QN800Machine *machine = object;
+    if (!g_strcmp0(interface, "memory")) {
+        return &machine->alloc;
+    }
+
+    fprintf(stderr, "%s not present in arm/n800\n", interface);
+    g_assert_not_reached();
+}
+
+static QOSGraphObject *n800_get_device(void *obj, const char *device)
+{
+    QN800Machine *machine = obj;
+    if (!g_strcmp0(device, "omap_i2c")) {
+        return &machine->i2c_1.obj;
+    }
+
+    fprintf(stderr, "%s not present in arm/n800\n", device);
+    g_assert_not_reached();
+}
+
+static void n800_destructor(QOSGraphObject *obj)
+{
+    QN800Machine *machine = (QN800Machine *) obj;
+    alloc_destroy(&machine->alloc);
+}
+
+static void *qos_create_machine_arm_n800(QTestState *qts)
+{
+    QN800Machine *machine = g_new0(QN800Machine, 1);
+
+    alloc_init(&machine->alloc, 0,
+               N800_RAM_START,
+               N800_RAM_END,
+               ARM_PAGE_SIZE);
+    machine->obj.get_device = n800_get_device;
+    machine->obj.get_driver = n800_get_driver;
+    machine->obj.destructor = n800_destructor;
+
+    omap_i2c_init(&machine->i2c_1, qts, 0x48070000);
+    return &machine->obj;
+}
+
+static void n800_register_nodes(void)
+{
+    QOSGraphEdgeOptions edge = {
+        .extra_device_opts = "bus=i2c-bus.0"
+    };
+    qos_node_create_machine("arm/n800", qos_create_machine_arm_n800);
+    qos_node_contains("arm/n800", "omap_i2c", &edge, NULL);
+}
+
+libqos_init(n800_register_nodes);