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authorfishsoupisgood <github@madingley.org>2019-04-29 01:17:54 +0100
committerfishsoupisgood <github@madingley.org>2019-05-27 03:43:43 +0100
commit3f2546b2ef55b661fd8dd69682b38992225e86f6 (patch)
tree65ca85f13617aee1dce474596800950f266a456c /target-mips/cpu.c
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Initial import of qemu-2.4.1HEADmaster
Diffstat (limited to 'target-mips/cpu.c')
-rw-r--r--target-mips/cpu.c180
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)