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1 /*
2  *  AArch64 translation
3  *
4  *  Copyright (c) 2013 Alexander Graf <[email protected]>
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
18  */
19 #include <stdarg.h>
20 #include <stdlib.h>
21 #include <stdio.h>
22 #include <string.h>
23 #include <inttypes.h>
24
25 #include "cpu.h"
26 #include "tcg-op.h"
27 #include "qemu/log.h"
28 #include "translate.h"
29 #include "qemu/host-utils.h"
30
31 #include "helper.h"
32 #define GEN_HELPER 1
33 #include "helper.h"
34
35 static TCGv_i64 cpu_X[32];
36 static TCGv_i64 cpu_pc;
37 static TCGv_i32 pstate;
38
39 static const char *regnames[] = {
40     "x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7",
41     "x8", "x9", "x10", "x11", "x12", "x13", "x14", "x15",
42     "x16", "x17", "x18", "x19", "x20", "x21", "x22", "x23",
43     "x24", "x25", "x26", "x27", "x28", "x29", "lr", "sp"
44 };
45
46 /* initialize TCG globals.  */
47 void a64_translate_init(void)
48 {
49     int i;
50
51     cpu_pc = tcg_global_mem_new_i64(TCG_AREG0,
52                                     offsetof(CPUARMState, pc),
53                                     "pc");
54     for (i = 0; i < 32; i++) {
55         cpu_X[i] = tcg_global_mem_new_i64(TCG_AREG0,
56                                           offsetof(CPUARMState, xregs[i]),
57                                           regnames[i]);
58     }
59
60     pstate = tcg_global_mem_new_i32(TCG_AREG0,
61                                     offsetof(CPUARMState, pstate),
62                                     "pstate");
63 }
64
65 void aarch64_cpu_dump_state(CPUState *cs, FILE *f,
66                             fprintf_function cpu_fprintf, int flags)
67 {
68     ARMCPU *cpu = ARM_CPU(cs);
69     CPUARMState *env = &cpu->env;
70     int i;
71
72     cpu_fprintf(f, "PC=%016"PRIx64"  SP=%016"PRIx64"\n",
73             env->pc, env->xregs[31]);
74     for (i = 0; i < 31; i++) {
75         cpu_fprintf(f, "X%02d=%016"PRIx64, i, env->xregs[i]);
76         if ((i % 4) == 3) {
77             cpu_fprintf(f, "\n");
78         } else {
79             cpu_fprintf(f, " ");
80         }
81     }
82     cpu_fprintf(f, "PSTATE=%c%c%c%c\n",
83         env->pstate & PSTATE_N ? 'n' : '.',
84         env->pstate & PSTATE_Z ? 'z' : '.',
85         env->pstate & PSTATE_C ? 'c' : '.',
86         env->pstate & PSTATE_V ? 'v' : '.');
87     cpu_fprintf(f, "\n");
88 }
89
90 void gen_a64_set_pc_im(uint64_t val)
91 {
92     tcg_gen_movi_i64(cpu_pc, val);
93 }
94
95 static void gen_exception(int excp)
96 {
97     TCGv_i32 tmp = tcg_temp_new_i32();
98     tcg_gen_movi_i32(tmp, excp);
99     gen_helper_exception(cpu_env, tmp);
100     tcg_temp_free_i32(tmp);
101 }
102
103 static void gen_exception_insn(DisasContext *s, int offset, int excp)
104 {
105     gen_a64_set_pc_im(s->pc - offset);
106     gen_exception(excp);
107     s->is_jmp = DISAS_JUMP;
108 }
109
110 static void real_unallocated_encoding(DisasContext *s)
111 {
112     fprintf(stderr, "Unknown instruction: %#x\n", s->insn);
113     gen_exception_insn(s, 4, EXCP_UDEF);
114 }
115
116 #define unallocated_encoding(s) do { \
117     fprintf(stderr, "unallocated encoding at line: %d\n", __LINE__); \
118     real_unallocated_encoding(s); \
119     } while (0)
120
121 void disas_a64_insn(CPUARMState *env, DisasContext *s)
122 {
123     uint32_t insn;
124
125     insn = arm_ldl_code(env, s->pc, s->bswap_code);
126     s->insn = insn;
127     s->pc += 4;
128
129     switch ((insn >> 24) & 0x1f) {
130     default:
131         unallocated_encoding(s);
132         break;
133     }
134
135     if (unlikely(s->singlestep_enabled) && (s->is_jmp == DISAS_TB_JUMP)) {
136         /* go through the main loop for single step */
137         s->is_jmp = DISAS_JUMP;
138     }
139 }
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