target-arm: Add AArch64 translation stub

[qemu.git] / target-arm / translate-a64.c

diff --git a/target-arm/translate-a64.c b/target-arm/translate-a64.c
new file mode 100644 (file)
index 0000000..f120088
--- /dev/null
+++ b/target-arm/translate-a64.c
@@ -0,0 +1,139 @@
+/*
+ *  AArch64 translation
+ *
+ *  Copyright (c) 2013 Alexander Graf <agraf@suse.de>
+ *
+ * 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 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/>.
+ */
+#include <stdarg.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <inttypes.h>
+
+#include "cpu.h"
+#include "tcg-op.h"
+#include "qemu/log.h"
+#include "translate.h"
+#include "qemu/host-utils.h"
+
+#include "helper.h"
+#define GEN_HELPER 1
+#include "helper.h"
+
+static TCGv_i64 cpu_X[32];
+static TCGv_i64 cpu_pc;
+static TCGv_i32 pstate;
+
+static const char *regnames[] = {
+    "x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7",
+    "x8", "x9", "x10", "x11", "x12", "x13", "x14", "x15",
+    "x16", "x17", "x18", "x19", "x20", "x21", "x22", "x23",
+    "x24", "x25", "x26", "x27", "x28", "x29", "lr", "sp"
+};
+
+/* initialize TCG globals.  */
+void a64_translate_init(void)
+{
+    int i;
+
+    cpu_pc = tcg_global_mem_new_i64(TCG_AREG0,
+                                    offsetof(CPUARMState, pc),
+                                    "pc");
+    for (i = 0; i < 32; i++) {
+        cpu_X[i] = tcg_global_mem_new_i64(TCG_AREG0,
+                                          offsetof(CPUARMState, xregs[i]),
+                                          regnames[i]);
+    }
+
+    pstate = tcg_global_mem_new_i32(TCG_AREG0,
+                                    offsetof(CPUARMState, pstate),
+                                    "pstate");
+}
+
+void aarch64_cpu_dump_state(CPUState *cs, FILE *f,
+                            fprintf_function cpu_fprintf, int flags)
+{
+    ARMCPU *cpu = ARM_CPU(cs);
+    CPUARMState *env = &cpu->env;
+    int i;
+
+    cpu_fprintf(f, "PC=%016"PRIx64"  SP=%016"PRIx64"\n",
+            env->pc, env->xregs[31]);
+    for (i = 0; i < 31; i++) {
+        cpu_fprintf(f, "X%02d=%016"PRIx64, i, env->xregs[i]);
+        if ((i % 4) == 3) {
+            cpu_fprintf(f, "\n");
+        } else {
+            cpu_fprintf(f, " ");
+        }
+    }
+    cpu_fprintf(f, "PSTATE=%c%c%c%c\n",
+        env->pstate & PSTATE_N ? 'n' : '.',
+        env->pstate & PSTATE_Z ? 'z' : '.',
+        env->pstate & PSTATE_C ? 'c' : '.',
+        env->pstate & PSTATE_V ? 'v' : '.');
+    cpu_fprintf(f, "\n");
+}
+
+void gen_a64_set_pc_im(uint64_t val)
+{
+    tcg_gen_movi_i64(cpu_pc, val);
+}
+
+static void gen_exception(int excp)
+{
+    TCGv_i32 tmp = tcg_temp_new_i32();
+    tcg_gen_movi_i32(tmp, excp);
+    gen_helper_exception(cpu_env, tmp);
+    tcg_temp_free_i32(tmp);
+}
+
+static void gen_exception_insn(DisasContext *s, int offset, int excp)
+{
+    gen_a64_set_pc_im(s->pc - offset);
+    gen_exception(excp);
+    s->is_jmp = DISAS_JUMP;
+}
+
+static void real_unallocated_encoding(DisasContext *s)
+{
+    fprintf(stderr, "Unknown instruction: %#x\n", s->insn);
+    gen_exception_insn(s, 4, EXCP_UDEF);
+}
+
+#define unallocated_encoding(s) do { \
+    fprintf(stderr, "unallocated encoding at line: %d\n", __LINE__); \
+    real_unallocated_encoding(s); \
+    } while (0)
+
+void disas_a64_insn(CPUARMState *env, DisasContext *s)
+{
+    uint32_t insn;
+
+    insn = arm_ldl_code(env, s->pc, s->bswap_code);
+    s->insn = insn;
+    s->pc += 4;
+
+    switch ((insn >> 24) & 0x1f) {
+    default:
+        unallocated_encoding(s);
+        break;
+    }
+
+    if (unlikely(s->singlestep_enabled) && (s->is_jmp == DISAS_TB_JUMP)) {
+        /* go through the main loop for single step */
+        s->is_jmp = DISAS_JUMP;
+    }
+}