target-hppa: Add framework and enable compilation

This is just about the minimum required to enable compilation
without actually executing any instructions.  This contains the
HPPACPU structure and the required callbacks, the gdbstub, the
basic translation loop, and a translate_one function that always
results in an illegal instruction.

Signed-off-by: Richard Henderson <rth@twiddle.net>

1 files changed, 164 insertions, 0 deletions

diff --git a/target/hppa/cpu.c b/target/hppa/cpu.c
new file mode 100644
index 0000000000..1d791d0f80
--- /dev/null
+++ b/target/hppa/cpu.c
@@ -0,0 +1,164 @@
+/*
+ * QEMU HPPA CPU
+ *
+ * Copyright (c) 2016 Richard Henderson <rth@twiddle.net>
+ *
+ * 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/lgpl-2.1.html>
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "cpu.h"
+#include "qemu-common.h"
+#include "migration/vmstate.h"
+#include "exec/exec-all.h"
+
+
+static void hppa_cpu_set_pc(CPUState *cs, vaddr value)
+{
+    HPPACPU *cpu = HPPA_CPU(cs);
+
+    cpu->env.iaoq_f = value;
+    cpu->env.iaoq_b = value + 4;
+}
+
+static void hppa_cpu_synchronize_from_tb(CPUState *cs, TranslationBlock *tb)
+{
+    HPPACPU *cpu = HPPA_CPU(cs);
+
+    cpu->env.iaoq_f = tb->pc;
+    cpu->env.iaoq_b = tb->cs_base;
+    cpu->env.psw_n = tb->flags & 1;
+}
+
+static void hppa_cpu_disas_set_info(CPUState *cs, disassemble_info *info)
+{
+    info->mach = bfd_mach_hppa20;
+    info->print_insn = print_insn_hppa;
+}
+
+static void hppa_cpu_realizefn(DeviceState *dev, Error **errp)
+{
+    CPUState *cs = CPU(dev);
+    HPPACPUClass *acc = HPPA_CPU_GET_CLASS(dev);
+    Error *local_err = NULL;
+
+    cpu_exec_realizefn(cs, &local_err);
+    if (local_err != NULL) {
+        error_propagate(errp, local_err);
+        return;
+    }
+
+    qemu_init_vcpu(cs);
+    acc->parent_realize(dev, errp);
+}
+
+/* Sort hppabetically by type name. */
+static gint hppa_cpu_list_compare(gconstpointer a, gconstpointer b)
+{
+    ObjectClass *class_a = (ObjectClass *)a;
+    ObjectClass *class_b = (ObjectClass *)b;
+    const char *name_a, *name_b;
+
+    name_a = object_class_get_name(class_a);
+    name_b = object_class_get_name(class_b);
+    return strcmp(name_a, name_b);
+}
+
+static void hppa_cpu_list_entry(gpointer data, gpointer user_data)
+{
+    ObjectClass *oc = data;
+    CPUListState *s = user_data;
+
+    (*s->cpu_fprintf)(s->file, "  %s\n", object_class_get_name(oc));
+}
+
+void hppa_cpu_list(FILE *f, fprintf_function cpu_fprintf)
+{
+    CPUListState s = {
+        .file = f,
+        .cpu_fprintf = cpu_fprintf,
+    };
+    GSList *list;
+
+    list = object_class_get_list(TYPE_HPPA_CPU, false);
+    list = g_slist_sort(list, hppa_cpu_list_compare);
+    (*cpu_fprintf)(f, "Available CPUs:\n");
+    g_slist_foreach(list, hppa_cpu_list_entry, &s);
+    g_slist_free(list);
+}
+
+static void hppa_cpu_initfn(Object *obj)
+{
+    CPUState *cs = CPU(obj);
+    HPPACPU *cpu = HPPA_CPU(obj);
+    CPUHPPAState *env = &cpu->env;
+
+    cs->env_ptr = env;
+    cpu_hppa_loaded_fr0(env);
+    set_snan_bit_is_one(true, &env->fp_status);
+
+    hppa_translate_init();
+}
+
+HPPACPU *cpu_hppa_init(const char *cpu_model)
+{
+    HPPACPU *cpu;
+
+    cpu = HPPA_CPU(object_new(TYPE_HPPA_CPU));
+
+    object_property_set_bool(OBJECT(cpu), true, "realized", NULL);
+
+    return cpu;
+}
+
+static void hppa_cpu_class_init(ObjectClass *oc, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(oc);
+    CPUClass *cc = CPU_CLASS(oc);
+    HPPACPUClass *acc = HPPA_CPU_CLASS(oc);
+
+    acc->parent_realize = dc->realize;
+    dc->realize = hppa_cpu_realizefn;
+
+    cc->do_interrupt = hppa_cpu_do_interrupt;
+    cc->cpu_exec_interrupt = hppa_cpu_exec_interrupt;
+    cc->dump_state = hppa_cpu_dump_state;
+    cc->set_pc = hppa_cpu_set_pc;
+    cc->synchronize_from_tb = hppa_cpu_synchronize_from_tb;
+    cc->gdb_read_register = hppa_cpu_gdb_read_register;
+    cc->gdb_write_register = hppa_cpu_gdb_write_register;
+    cc->handle_mmu_fault = hppa_cpu_handle_mmu_fault;
+    cc->disas_set_info = hppa_cpu_disas_set_info;
+
+    cc->gdb_num_core_regs = 128;
+}
+
+static const TypeInfo hppa_cpu_type_info = {
+    .name = TYPE_HPPA_CPU,
+    .parent = TYPE_CPU,
+    .instance_size = sizeof(HPPACPU),
+    .instance_init = hppa_cpu_initfn,
+    .abstract = false,
+    .class_size = sizeof(HPPACPUClass),
+    .class_init = hppa_cpu_class_init,
+};
+
+static void hppa_cpu_register_types(void)
+{
+    type_register_static(&hppa_cpu_type_info);
+}
+
+type_init(hppa_cpu_register_types)