Initial import of qemu-2.4.1HEADmaster

1 files changed, 182 insertions, 0 deletions

diff --git a/target-xtensa/cpu.c b/target-xtensa/cpu.c
new file mode 100644
index 00000000..4e49bee9
--- /dev/null
+++ b/target-xtensa/cpu.c
@@ -0,0 +1,182 @@
+/*
+ * QEMU Xtensa CPU
+ *
+ * Copyright (c) 2011, Max Filippov, Open Source and Linux Lab.
+ * Copyright (c) 2012 SUSE LINUX Products GmbH
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the Open Source and Linux Lab nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "cpu.h"
+#include "qemu-common.h"
+#include "migration/vmstate.h"
+
+
+static void xtensa_cpu_set_pc(CPUState *cs, vaddr value)
+{
+    XtensaCPU *cpu = XTENSA_CPU(cs);
+
+    cpu->env.pc = value;
+}
+
+static bool xtensa_cpu_has_work(CPUState *cs)
+{
+    XtensaCPU *cpu = XTENSA_CPU(cs);
+
+    return cpu->env.pending_irq_level;
+}
+
+/* CPUClass::reset() */
+static void xtensa_cpu_reset(CPUState *s)
+{
+    XtensaCPU *cpu = XTENSA_CPU(s);
+    XtensaCPUClass *xcc = XTENSA_CPU_GET_CLASS(cpu);
+    CPUXtensaState *env = &cpu->env;
+
+    xcc->parent_reset(s);
+
+    env->exception_taken = 0;
+    env->pc = env->config->exception_vector[EXC_RESET];
+    env->sregs[LITBASE] &= ~1;
+    env->sregs[PS] = xtensa_option_enabled(env->config,
+            XTENSA_OPTION_INTERRUPT) ? 0x1f : 0x10;
+    env->sregs[VECBASE] = env->config->vecbase;
+    env->sregs[IBREAKENABLE] = 0;
+    env->sregs[CACHEATTR] = 0x22222222;
+    env->sregs[ATOMCTL] = xtensa_option_enabled(env->config,
+            XTENSA_OPTION_ATOMCTL) ? 0x28 : 0x15;
+    env->sregs[CONFIGID0] = env->config->configid[0];
+    env->sregs[CONFIGID1] = env->config->configid[1];
+
+    env->pending_irq_level = 0;
+    reset_mmu(env);
+}
+
+static ObjectClass *xtensa_cpu_class_by_name(const char *cpu_model)
+{
+    ObjectClass *oc;
+    char *typename;
+
+    if (cpu_model == NULL) {
+        return NULL;
+    }
+
+    typename = g_strdup_printf("%s-" TYPE_XTENSA_CPU, cpu_model);
+    oc = object_class_by_name(typename);
+    g_free(typename);
+    if (oc == NULL || !object_class_dynamic_cast(oc, TYPE_XTENSA_CPU) ||
+        object_class_is_abstract(oc)) {
+        return NULL;
+    }
+    return oc;
+}
+
+static void xtensa_cpu_realizefn(DeviceState *dev, Error **errp)
+{
+    CPUState *cs = CPU(dev);
+    XtensaCPUClass *xcc = XTENSA_CPU_GET_CLASS(dev);
+
+    cs->gdb_num_regs = xcc->config->gdb_regmap.num_regs;
+
+    qemu_init_vcpu(cs);
+
+    xcc->parent_realize(dev, errp);
+}
+
+static void xtensa_cpu_initfn(Object *obj)
+{
+    CPUState *cs = CPU(obj);
+    XtensaCPU *cpu = XTENSA_CPU(obj);
+    XtensaCPUClass *xcc = XTENSA_CPU_GET_CLASS(obj);
+    CPUXtensaState *env = &cpu->env;
+    static bool tcg_inited;
+
+    cs->env_ptr = env;
+    env->config = xcc->config;
+    cpu_exec_init(cs, &error_abort);
+
+    if (tcg_enabled() && !tcg_inited) {
+        tcg_inited = true;
+        xtensa_translate_init();
+    }
+}
+
+static const VMStateDescription vmstate_xtensa_cpu = {
+    .name = "cpu",
+    .unmigratable = 1,
+};
+
+static void xtensa_cpu_class_init(ObjectClass *oc, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(oc);
+    CPUClass *cc = CPU_CLASS(oc);
+    XtensaCPUClass *xcc = XTENSA_CPU_CLASS(cc);
+
+    xcc->parent_realize = dc->realize;
+    dc->realize = xtensa_cpu_realizefn;
+
+    xcc->parent_reset = cc->reset;
+    cc->reset = xtensa_cpu_reset;
+
+    cc->class_by_name = xtensa_cpu_class_by_name;
+    cc->has_work = xtensa_cpu_has_work;
+    cc->do_interrupt = xtensa_cpu_do_interrupt;
+    cc->cpu_exec_interrupt = xtensa_cpu_exec_interrupt;
+    cc->dump_state = xtensa_cpu_dump_state;
+    cc->set_pc = xtensa_cpu_set_pc;
+    cc->gdb_read_register = xtensa_cpu_gdb_read_register;
+    cc->gdb_write_register = xtensa_cpu_gdb_write_register;
+    cc->gdb_stop_before_watchpoint = true;
+#ifndef CONFIG_USER_ONLY
+    cc->do_unaligned_access = xtensa_cpu_do_unaligned_access;
+    cc->get_phys_page_debug = xtensa_cpu_get_phys_page_debug;
+    cc->do_unassigned_access = xtensa_cpu_do_unassigned_access;
+#endif
+    cc->debug_excp_handler = xtensa_breakpoint_handler;
+    dc->vmsd = &vmstate_xtensa_cpu;
+
+    /*
+     * Reason: xtensa_cpu_initfn() calls cpu_exec_init(), which saves
+     * the object in cpus -> dangling pointer after final
+     * object_unref().
+     */
+    dc->cannot_destroy_with_object_finalize_yet = true;
+}
+
+static const TypeInfo xtensa_cpu_type_info = {
+    .name = TYPE_XTENSA_CPU,
+    .parent = TYPE_CPU,
+    .instance_size = sizeof(XtensaCPU),
+    .instance_init = xtensa_cpu_initfn,
+    .abstract = true,
+    .class_size = sizeof(XtensaCPUClass),
+    .class_init = xtensa_cpu_class_init,
+};
+
+static void xtensa_cpu_register_types(void)
+{
+    type_register_static(&xtensa_cpu_type_info);
+}
+
+type_init(xtensa_cpu_register_types)