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-rw-r--r--qemu/target-tilegx/cpu.c187
1 files changed, 187 insertions, 0 deletions
diff --git a/qemu/target-tilegx/cpu.c b/qemu/target-tilegx/cpu.c
new file mode 100644
index 000000000..d2d091203
--- /dev/null
+++ b/qemu/target-tilegx/cpu.c
@@ -0,0 +1,187 @@
+/*
+ * QEMU TILE-Gx CPU
+ *
+ * Copyright (c) 2015 Chen Gang
+ *
+ * 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 "hw/qdev-properties.h"
+#include "migration/vmstate.h"
+#include "linux-user/syscall_defs.h"
+
+static void tilegx_cpu_dump_state(CPUState *cs, FILE *f,
+ fprintf_function cpu_fprintf, int flags)
+{
+ static const char * const reg_names[TILEGX_R_COUNT] = {
+ "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
+ "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
+ "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
+ "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
+ "r32", "r33", "r34", "r35", "r36", "r37", "r38", "r39",
+ "r40", "r41", "r42", "r43", "r44", "r45", "r46", "r47",
+ "r48", "r49", "r50", "r51", "bp", "tp", "sp", "lr"
+ };
+
+ TileGXCPU *cpu = TILEGX_CPU(cs);
+ CPUTLGState *env = &cpu->env;
+ int i;
+
+ for (i = 0; i < TILEGX_R_COUNT; i++) {
+ cpu_fprintf(f, "%-4s" TARGET_FMT_lx "%s",
+ reg_names[i], env->regs[i],
+ (i % 4) == 3 ? "\n" : " ");
+ }
+ cpu_fprintf(f, "PC " TARGET_FMT_lx " CEX " TARGET_FMT_lx "\n\n",
+ env->pc, env->spregs[TILEGX_SPR_CMPEXCH]);
+}
+
+TileGXCPU *cpu_tilegx_init(const char *cpu_model)
+{
+ TileGXCPU *cpu;
+
+ cpu = TILEGX_CPU(object_new(TYPE_TILEGX_CPU));
+
+ object_property_set_bool(OBJECT(cpu), true, "realized", NULL);
+
+ return cpu;
+}
+
+static void tilegx_cpu_set_pc(CPUState *cs, vaddr value)
+{
+ TileGXCPU *cpu = TILEGX_CPU(cs);
+
+ cpu->env.pc = value;
+}
+
+static bool tilegx_cpu_has_work(CPUState *cs)
+{
+ return true;
+}
+
+static void tilegx_cpu_reset(CPUState *s)
+{
+ TileGXCPU *cpu = TILEGX_CPU(s);
+ TileGXCPUClass *tcc = TILEGX_CPU_GET_CLASS(cpu);
+ CPUTLGState *env = &cpu->env;
+
+ tcc->parent_reset(s);
+
+ memset(env, 0, sizeof(CPUTLGState));
+ tlb_flush(s, 1);
+}
+
+static void tilegx_cpu_realizefn(DeviceState *dev, Error **errp)
+{
+ CPUState *cs = CPU(dev);
+ TileGXCPUClass *tcc = TILEGX_CPU_GET_CLASS(dev);
+
+ cpu_reset(cs);
+ qemu_init_vcpu(cs);
+
+ tcc->parent_realize(dev, errp);
+}
+
+static void tilegx_cpu_initfn(Object *obj)
+{
+ CPUState *cs = CPU(obj);
+ TileGXCPU *cpu = TILEGX_CPU(obj);
+ CPUTLGState *env = &cpu->env;
+ static bool tcg_initialized;
+
+ cs->env_ptr = env;
+ cpu_exec_init(cs, &error_abort);
+
+ if (tcg_enabled() && !tcg_initialized) {
+ tcg_initialized = true;
+ tilegx_tcg_init();
+ }
+}
+
+static void tilegx_cpu_do_interrupt(CPUState *cs)
+{
+ cs->exception_index = -1;
+}
+
+static int tilegx_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw,
+ int mmu_idx)
+{
+ TileGXCPU *cpu = TILEGX_CPU(cs);
+
+ /* The sigcode field will be filled in by do_signal in main.c. */
+ cs->exception_index = TILEGX_EXCP_SIGNAL;
+ cpu->env.excaddr = address;
+ cpu->env.signo = TARGET_SIGSEGV;
+ cpu->env.sigcode = 0;
+
+ return 1;
+}
+
+static bool tilegx_cpu_exec_interrupt(CPUState *cs, int interrupt_request)
+{
+ if (interrupt_request & CPU_INTERRUPT_HARD) {
+ tilegx_cpu_do_interrupt(cs);
+ return true;
+ }
+ return false;
+}
+
+static void tilegx_cpu_class_init(ObjectClass *oc, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(oc);
+ CPUClass *cc = CPU_CLASS(oc);
+ TileGXCPUClass *tcc = TILEGX_CPU_CLASS(oc);
+
+ tcc->parent_realize = dc->realize;
+ dc->realize = tilegx_cpu_realizefn;
+
+ tcc->parent_reset = cc->reset;
+ cc->reset = tilegx_cpu_reset;
+
+ cc->has_work = tilegx_cpu_has_work;
+ cc->do_interrupt = tilegx_cpu_do_interrupt;
+ cc->cpu_exec_interrupt = tilegx_cpu_exec_interrupt;
+ cc->dump_state = tilegx_cpu_dump_state;
+ cc->set_pc = tilegx_cpu_set_pc;
+ cc->handle_mmu_fault = tilegx_cpu_handle_mmu_fault;
+ cc->gdb_num_core_regs = 0;
+
+ /*
+ * Reason: tilegx_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 tilegx_cpu_type_info = {
+ .name = TYPE_TILEGX_CPU,
+ .parent = TYPE_CPU,
+ .instance_size = sizeof(TileGXCPU),
+ .instance_init = tilegx_cpu_initfn,
+ .class_size = sizeof(TileGXCPUClass),
+ .class_init = tilegx_cpu_class_init,
+};
+
+static void tilegx_cpu_register_types(void)
+{
+ type_register_static(&tilegx_cpu_type_info);
+}
+
+type_init(tilegx_cpu_register_types)