Initial import of qemu-2.4.1HEADmaster

1 files changed, 180 insertions, 0 deletions

diff --git a/target-mips/cpu.c b/target-mips/cpu.c
new file mode 100644
index 00000000..7fe1f040
--- /dev/null
+++ b/target-mips/cpu.c
@@ -0,0 +1,180 @@
+/*
+ * QEMU MIPS CPU
+ *
+ * Copyright (c) 2012 SUSE LINUX Products GmbH
+ *
+ * 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 "cpu.h"
+#include "kvm_mips.h"
+#include "qemu-common.h"
+#include "sysemu/kvm.h"
+
+
+static void mips_cpu_set_pc(CPUState *cs, vaddr value)
+{
+    MIPSCPU *cpu = MIPS_CPU(cs);
+    CPUMIPSState *env = &cpu->env;
+
+    env->active_tc.PC = value & ~(target_ulong)1;
+    if (value & 1) {
+        env->hflags |= MIPS_HFLAG_M16;
+    } else {
+        env->hflags &= ~(MIPS_HFLAG_M16);
+    }
+}
+
+static void mips_cpu_synchronize_from_tb(CPUState *cs, TranslationBlock *tb)
+{
+    MIPSCPU *cpu = MIPS_CPU(cs);
+    CPUMIPSState *env = &cpu->env;
+
+    env->active_tc.PC = tb->pc;
+    env->hflags &= ~MIPS_HFLAG_BMASK;
+    env->hflags |= tb->flags & MIPS_HFLAG_BMASK;
+}
+
+static bool mips_cpu_has_work(CPUState *cs)
+{
+    MIPSCPU *cpu = MIPS_CPU(cs);
+    CPUMIPSState *env = &cpu->env;
+    bool has_work = false;
+
+    /* It is implementation dependent if non-enabled interrupts
+       wake-up the CPU, however most of the implementations only
+       check for interrupts that can be taken. */
+    if ((cs->interrupt_request & CPU_INTERRUPT_HARD) &&
+        cpu_mips_hw_interrupts_pending(env)) {
+        has_work = true;
+    }
+
+    /* MIPS-MT has the ability to halt the CPU.  */
+    if (env->CP0_Config3 & (1 << CP0C3_MT)) {
+        /* The QEMU model will issue an _WAKE request whenever the CPUs
+           should be woken up.  */
+        if (cs->interrupt_request & CPU_INTERRUPT_WAKE) {
+            has_work = true;
+        }
+
+        if (!mips_vpe_active(env)) {
+            has_work = false;
+        }
+    }
+    return has_work;
+}
+
+/* CPUClass::reset() */
+static void mips_cpu_reset(CPUState *s)
+{
+    MIPSCPU *cpu = MIPS_CPU(s);
+    MIPSCPUClass *mcc = MIPS_CPU_GET_CLASS(cpu);
+    CPUMIPSState *env = &cpu->env;
+
+    mcc->parent_reset(s);
+
+    memset(env, 0, offsetof(CPUMIPSState, mvp));
+    tlb_flush(s, 1);
+
+    cpu_state_reset(env);
+
+#ifndef CONFIG_USER_ONLY
+    if (kvm_enabled()) {
+        kvm_mips_reset_vcpu(cpu);
+    }
+#endif
+}
+
+static void mips_cpu_realizefn(DeviceState *dev, Error **errp)
+{
+    CPUState *cs = CPU(dev);
+    MIPSCPUClass *mcc = MIPS_CPU_GET_CLASS(dev);
+
+    cpu_reset(cs);
+    qemu_init_vcpu(cs);
+
+    mcc->parent_realize(dev, errp);
+}
+
+static void mips_cpu_initfn(Object *obj)
+{
+    CPUState *cs = CPU(obj);
+    MIPSCPU *cpu = MIPS_CPU(obj);
+    CPUMIPSState *env = &cpu->env;
+
+    cs->env_ptr = env;
+    cpu_exec_init(cs, &error_abort);
+
+    if (tcg_enabled()) {
+        mips_tcg_init();
+    }
+}
+
+static void mips_cpu_class_init(ObjectClass *c, void *data)
+{
+    MIPSCPUClass *mcc = MIPS_CPU_CLASS(c);
+    CPUClass *cc = CPU_CLASS(c);
+    DeviceClass *dc = DEVICE_CLASS(c);
+
+    mcc->parent_realize = dc->realize;
+    dc->realize = mips_cpu_realizefn;
+
+    mcc->parent_reset = cc->reset;
+    cc->reset = mips_cpu_reset;
+
+    cc->has_work = mips_cpu_has_work;
+    cc->do_interrupt = mips_cpu_do_interrupt;
+    cc->cpu_exec_interrupt = mips_cpu_exec_interrupt;
+    cc->dump_state = mips_cpu_dump_state;
+    cc->set_pc = mips_cpu_set_pc;
+    cc->synchronize_from_tb = mips_cpu_synchronize_from_tb;
+    cc->gdb_read_register = mips_cpu_gdb_read_register;
+    cc->gdb_write_register = mips_cpu_gdb_write_register;
+#ifdef CONFIG_USER_ONLY
+    cc->handle_mmu_fault = mips_cpu_handle_mmu_fault;
+#else
+    cc->do_unassigned_access = mips_cpu_unassigned_access;
+    cc->do_unaligned_access = mips_cpu_do_unaligned_access;
+    cc->get_phys_page_debug = mips_cpu_get_phys_page_debug;
+    cc->vmsd = &vmstate_mips_cpu;
+#endif
+
+    cc->gdb_num_core_regs = 73;
+    cc->gdb_stop_before_watchpoint = true;
+
+    /*
+     * Reason: mips_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 mips_cpu_type_info = {
+    .name = TYPE_MIPS_CPU,
+    .parent = TYPE_CPU,
+    .instance_size = sizeof(MIPSCPU),
+    .instance_init = mips_cpu_initfn,
+    .abstract = false,
+    .class_size = sizeof(MIPSCPUClass),
+    .class_init = mips_cpu_class_init,
+};
+
+static void mips_cpu_register_types(void)
+{
+    type_register_static(&mips_cpu_type_info);
+}
+
+type_init(mips_cpu_register_types)