Introduce Virtio-loopback epsilon release:

Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.

Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9

1 files changed, 205 insertions, 0 deletions

diff --git a/target/tricore/cpu.c b/target/tricore/cpu.c
new file mode 100644
index 000000000..b95682b7f
--- /dev/null
+++ b/target/tricore/cpu.c
@@ -0,0 +1,205 @@
+/*
+ *  TriCore emulation for qemu: main translation routines.
+ *
+ *  Copyright (c) 2012-2014 Bastian Koppelmann C-Lab/University Paderborn
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * 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 "qapi/error.h"
+#include "cpu.h"
+#include "exec/exec-all.h"
+#include "qemu/error-report.h"
+
+static inline void set_feature(CPUTriCoreState *env, int feature)
+{
+    env->features |= 1ULL << feature;
+}
+
+static gchar *tricore_gdb_arch_name(CPUState *cs)
+{
+    return g_strdup("tricore");
+}
+
+static void tricore_cpu_set_pc(CPUState *cs, vaddr value)
+{
+    TriCoreCPU *cpu = TRICORE_CPU(cs);
+    CPUTriCoreState *env = &cpu->env;
+
+    env->PC = value & ~(target_ulong)1;
+}
+
+static void tricore_cpu_synchronize_from_tb(CPUState *cs,
+                                            const TranslationBlock *tb)
+{
+    TriCoreCPU *cpu = TRICORE_CPU(cs);
+    CPUTriCoreState *env = &cpu->env;
+
+    env->PC = tb->pc;
+}
+
+static void tricore_cpu_reset(DeviceState *dev)
+{
+    CPUState *s = CPU(dev);
+    TriCoreCPU *cpu = TRICORE_CPU(s);
+    TriCoreCPUClass *tcc = TRICORE_CPU_GET_CLASS(cpu);
+    CPUTriCoreState *env = &cpu->env;
+
+    tcc->parent_reset(dev);
+
+    cpu_state_reset(env);
+}
+
+static bool tricore_cpu_has_work(CPUState *cs)
+{
+    return true;
+}
+
+static void tricore_cpu_realizefn(DeviceState *dev, Error **errp)
+{
+    CPUState *cs = CPU(dev);
+    TriCoreCPU *cpu = TRICORE_CPU(dev);
+    TriCoreCPUClass *tcc = TRICORE_CPU_GET_CLASS(dev);
+    CPUTriCoreState *env = &cpu->env;
+    Error *local_err = NULL;
+
+    cpu_exec_realizefn(cs, &local_err);
+    if (local_err != NULL) {
+        error_propagate(errp, local_err);
+        return;
+    }
+
+    /* Some features automatically imply others */
+    if (tricore_feature(env, TRICORE_FEATURE_161)) {
+        set_feature(env, TRICORE_FEATURE_16);
+    }
+
+    if (tricore_feature(env, TRICORE_FEATURE_16)) {
+        set_feature(env, TRICORE_FEATURE_131);
+    }
+    if (tricore_feature(env, TRICORE_FEATURE_131)) {
+        set_feature(env, TRICORE_FEATURE_13);
+    }
+    cpu_reset(cs);
+    qemu_init_vcpu(cs);
+
+    tcc->parent_realize(dev, errp);
+}
+
+
+static void tricore_cpu_initfn(Object *obj)
+{
+    TriCoreCPU *cpu = TRICORE_CPU(obj);
+
+    cpu_set_cpustate_pointers(cpu);
+}
+
+static ObjectClass *tricore_cpu_class_by_name(const char *cpu_model)
+{
+    ObjectClass *oc;
+    char *typename;
+
+    typename = g_strdup_printf(TRICORE_CPU_TYPE_NAME("%s"), cpu_model);
+    oc = object_class_by_name(typename);
+    g_free(typename);
+    if (!oc || !object_class_dynamic_cast(oc, TYPE_TRICORE_CPU) ||
+        object_class_is_abstract(oc)) {
+        return NULL;
+    }
+    return oc;
+}
+
+static void tc1796_initfn(Object *obj)
+{
+    TriCoreCPU *cpu = TRICORE_CPU(obj);
+
+    set_feature(&cpu->env, TRICORE_FEATURE_13);
+}
+
+static void tc1797_initfn(Object *obj)
+{
+    TriCoreCPU *cpu = TRICORE_CPU(obj);
+
+    set_feature(&cpu->env, TRICORE_FEATURE_131);
+}
+
+static void tc27x_initfn(Object *obj)
+{
+    TriCoreCPU *cpu = TRICORE_CPU(obj);
+
+    set_feature(&cpu->env, TRICORE_FEATURE_161);
+}
+
+#include "hw/core/sysemu-cpu-ops.h"
+
+static const struct SysemuCPUOps tricore_sysemu_ops = {
+    .get_phys_page_debug = tricore_cpu_get_phys_page_debug,
+};
+
+#include "hw/core/tcg-cpu-ops.h"
+
+static const struct TCGCPUOps tricore_tcg_ops = {
+    .initialize = tricore_tcg_init,
+    .synchronize_from_tb = tricore_cpu_synchronize_from_tb,
+    .tlb_fill = tricore_cpu_tlb_fill,
+};
+
+static void tricore_cpu_class_init(ObjectClass *c, void *data)
+{
+    TriCoreCPUClass *mcc = TRICORE_CPU_CLASS(c);
+    CPUClass *cc = CPU_CLASS(c);
+    DeviceClass *dc = DEVICE_CLASS(c);
+
+    device_class_set_parent_realize(dc, tricore_cpu_realizefn,
+                                    &mcc->parent_realize);
+
+    device_class_set_parent_reset(dc, tricore_cpu_reset, &mcc->parent_reset);
+    cc->class_by_name = tricore_cpu_class_by_name;
+    cc->has_work = tricore_cpu_has_work;
+
+    cc->gdb_read_register = tricore_cpu_gdb_read_register;
+    cc->gdb_write_register = tricore_cpu_gdb_write_register;
+    cc->gdb_num_core_regs = 44;
+    cc->gdb_arch_name = tricore_gdb_arch_name;
+
+    cc->dump_state = tricore_cpu_dump_state;
+    cc->set_pc = tricore_cpu_set_pc;
+    cc->sysemu_ops = &tricore_sysemu_ops;
+    cc->tcg_ops = &tricore_tcg_ops;
+}
+
+#define DEFINE_TRICORE_CPU_TYPE(cpu_model, initfn) \
+    {                                              \
+        .parent = TYPE_TRICORE_CPU,                \
+        .instance_init = initfn,                   \
+        .name = TRICORE_CPU_TYPE_NAME(cpu_model),  \
+    }
+
+static const TypeInfo tricore_cpu_type_infos[] = {
+    {
+        .name = TYPE_TRICORE_CPU,
+        .parent = TYPE_CPU,
+        .instance_size = sizeof(TriCoreCPU),
+        .instance_init = tricore_cpu_initfn,
+        .abstract = true,
+        .class_size = sizeof(TriCoreCPUClass),
+        .class_init = tricore_cpu_class_init,
+    },
+    DEFINE_TRICORE_CPU_TYPE("tc1796", tc1796_initfn),
+    DEFINE_TRICORE_CPU_TYPE("tc1797", tc1797_initfn),
+    DEFINE_TRICORE_CPU_TYPE("tc27x", tc27x_initfn),
+};
+
+DEFINE_TYPES(tricore_cpu_type_infos)