4 * Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu
5 * Copyright (c) 2017-2018 SiFive, Inc.
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms and conditions of the GNU General Public License,
9 * version 2 or later, as published by the Free Software Foundation.
11 * This program is distributed in the hope it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 * You should have received a copy of the GNU General Public License along with
17 * this program. If not, see <http://www.gnu.org/licenses/>.
20 #include "qemu/osdep.h"
21 #include "qemu/qemu-print.h"
22 #include "qemu/ctype.h"
25 #include "exec/exec-all.h"
26 #include "qapi/error.h"
27 #include "qemu/error-report.h"
28 #include "hw/qdev-properties.h"
29 #include "migration/vmstate.h"
30 #include "fpu/softfloat-helpers.h"
32 /* RISC-V CPU definitions */
34 static const char riscv_exts
[26] = "IEMAFDQCLBJTPVNSUHKORWXYZG";
36 const char * const riscv_int_regnames
[] = {
37 "x0/zero", "x1/ra", "x2/sp", "x3/gp", "x4/tp", "x5/t0", "x6/t1",
38 "x7/t2", "x8/s0", "x9/s1", "x10/a0", "x11/a1", "x12/a2", "x13/a3",
39 "x14/a4", "x15/a5", "x16/a6", "x17/a7", "x18/s2", "x19/s3", "x20/s4",
40 "x21/s5", "x22/s6", "x23/s7", "x24/s8", "x25/s9", "x26/s10", "x27/s11",
41 "x28/t3", "x29/t4", "x30/t5", "x31/t6"
44 const char * const riscv_fpr_regnames
[] = {
45 "f0/ft0", "f1/ft1", "f2/ft2", "f3/ft3", "f4/ft4", "f5/ft5",
46 "f6/ft6", "f7/ft7", "f8/fs0", "f9/fs1", "f10/fa0", "f11/fa1",
47 "f12/fa2", "f13/fa3", "f14/fa4", "f15/fa5", "f16/fa6", "f17/fa7",
48 "f18/fs2", "f19/fs3", "f20/fs4", "f21/fs5", "f22/fs6", "f23/fs7",
49 "f24/fs8", "f25/fs9", "f26/fs10", "f27/fs11", "f28/ft8", "f29/ft9",
50 "f30/ft10", "f31/ft11"
53 const char * const riscv_excp_names
[] = {
56 "illegal_instruction",
72 const char * const riscv_intr_names
[] = {
91 static void set_misa(CPURISCVState
*env
, target_ulong misa
)
93 env
->misa_mask
= env
->misa
= misa
;
96 static void set_priv_version(CPURISCVState
*env
, int priv_ver
)
98 env
->priv_ver
= priv_ver
;
101 static void set_feature(CPURISCVState
*env
, int feature
)
103 env
->features
|= (1ULL << feature
);
106 static void set_resetvec(CPURISCVState
*env
, int resetvec
)
108 #ifndef CONFIG_USER_ONLY
109 env
->resetvec
= resetvec
;
113 static void riscv_any_cpu_init(Object
*obj
)
115 CPURISCVState
*env
= &RISCV_CPU(obj
)->env
;
116 set_misa(env
, RVXLEN
| RVI
| RVM
| RVA
| RVF
| RVD
| RVC
| RVU
);
117 set_priv_version(env
, PRIV_VERSION_1_11_0
);
118 set_resetvec(env
, DEFAULT_RSTVEC
);
121 #if defined(TARGET_RISCV32)
123 static void riscv_base32_cpu_init(Object
*obj
)
125 CPURISCVState
*env
= &RISCV_CPU(obj
)->env
;
126 /* We set this in the realise function */
130 static void rv32gcsu_priv1_09_1_cpu_init(Object
*obj
)
132 CPURISCVState
*env
= &RISCV_CPU(obj
)->env
;
133 set_misa(env
, RV32
| RVI
| RVM
| RVA
| RVF
| RVD
| RVC
| RVS
| RVU
);
134 set_priv_version(env
, PRIV_VERSION_1_09_1
);
135 set_resetvec(env
, DEFAULT_RSTVEC
);
136 set_feature(env
, RISCV_FEATURE_MMU
);
137 set_feature(env
, RISCV_FEATURE_PMP
);
140 static void rv32gcsu_priv1_10_0_cpu_init(Object
*obj
)
142 CPURISCVState
*env
= &RISCV_CPU(obj
)->env
;
143 set_misa(env
, RV32
| RVI
| RVM
| RVA
| RVF
| RVD
| RVC
| RVS
| RVU
);
144 set_priv_version(env
, PRIV_VERSION_1_10_0
);
145 set_resetvec(env
, DEFAULT_RSTVEC
);
146 set_feature(env
, RISCV_FEATURE_MMU
);
147 set_feature(env
, RISCV_FEATURE_PMP
);
150 static void rv32imacu_nommu_cpu_init(Object
*obj
)
152 CPURISCVState
*env
= &RISCV_CPU(obj
)->env
;
153 set_misa(env
, RV32
| RVI
| RVM
| RVA
| RVC
| RVU
);
154 set_priv_version(env
, PRIV_VERSION_1_10_0
);
155 set_resetvec(env
, DEFAULT_RSTVEC
);
156 set_feature(env
, RISCV_FEATURE_PMP
);
159 #elif defined(TARGET_RISCV64)
161 static void riscv_base64_cpu_init(Object
*obj
)
163 CPURISCVState
*env
= &RISCV_CPU(obj
)->env
;
164 /* We set this in the realise function */
168 static void rv64gcsu_priv1_09_1_cpu_init(Object
*obj
)
170 CPURISCVState
*env
= &RISCV_CPU(obj
)->env
;
171 set_misa(env
, RV64
| RVI
| RVM
| RVA
| RVF
| RVD
| RVC
| RVS
| RVU
);
172 set_priv_version(env
, PRIV_VERSION_1_09_1
);
173 set_resetvec(env
, DEFAULT_RSTVEC
);
174 set_feature(env
, RISCV_FEATURE_MMU
);
175 set_feature(env
, RISCV_FEATURE_PMP
);
178 static void rv64gcsu_priv1_10_0_cpu_init(Object
*obj
)
180 CPURISCVState
*env
= &RISCV_CPU(obj
)->env
;
181 set_misa(env
, RV64
| RVI
| RVM
| RVA
| RVF
| RVD
| RVC
| RVS
| RVU
);
182 set_priv_version(env
, PRIV_VERSION_1_10_0
);
183 set_resetvec(env
, DEFAULT_RSTVEC
);
184 set_feature(env
, RISCV_FEATURE_MMU
);
185 set_feature(env
, RISCV_FEATURE_PMP
);
188 static void rv64imacu_nommu_cpu_init(Object
*obj
)
190 CPURISCVState
*env
= &RISCV_CPU(obj
)->env
;
191 set_misa(env
, RV64
| RVI
| RVM
| RVA
| RVC
| RVU
);
192 set_priv_version(env
, PRIV_VERSION_1_10_0
);
193 set_resetvec(env
, DEFAULT_RSTVEC
);
194 set_feature(env
, RISCV_FEATURE_PMP
);
199 static ObjectClass
*riscv_cpu_class_by_name(const char *cpu_model
)
205 cpuname
= g_strsplit(cpu_model
, ",", 1);
206 typename
= g_strdup_printf(RISCV_CPU_TYPE_NAME("%s"), cpuname
[0]);
207 oc
= object_class_by_name(typename
);
210 if (!oc
|| !object_class_dynamic_cast(oc
, TYPE_RISCV_CPU
) ||
211 object_class_is_abstract(oc
)) {
217 static void riscv_cpu_dump_state(CPUState
*cs
, FILE *f
, int flags
)
219 RISCVCPU
*cpu
= RISCV_CPU(cs
);
220 CPURISCVState
*env
= &cpu
->env
;
223 qemu_fprintf(f
, " %s " TARGET_FMT_lx
"\n", "pc ", env
->pc
);
224 #ifndef CONFIG_USER_ONLY
225 qemu_fprintf(f
, " %s " TARGET_FMT_lx
"\n", "mhartid ", env
->mhartid
);
226 qemu_fprintf(f
, " %s " TARGET_FMT_lx
"\n", "mstatus ", env
->mstatus
);
227 qemu_fprintf(f
, " %s " TARGET_FMT_lx
"\n", "mip ",
228 (target_ulong
)atomic_read(&env
->mip
));
229 qemu_fprintf(f
, " %s " TARGET_FMT_lx
"\n", "mie ", env
->mie
);
230 qemu_fprintf(f
, " %s " TARGET_FMT_lx
"\n", "mideleg ", env
->mideleg
);
231 qemu_fprintf(f
, " %s " TARGET_FMT_lx
"\n", "medeleg ", env
->medeleg
);
232 qemu_fprintf(f
, " %s " TARGET_FMT_lx
"\n", "mtvec ", env
->mtvec
);
233 qemu_fprintf(f
, " %s " TARGET_FMT_lx
"\n", "mepc ", env
->mepc
);
234 qemu_fprintf(f
, " %s " TARGET_FMT_lx
"\n", "mcause ", env
->mcause
);
237 for (i
= 0; i
< 32; i
++) {
238 qemu_fprintf(f
, " %s " TARGET_FMT_lx
,
239 riscv_int_regnames
[i
], env
->gpr
[i
]);
241 qemu_fprintf(f
, "\n");
244 if (flags
& CPU_DUMP_FPU
) {
245 for (i
= 0; i
< 32; i
++) {
246 qemu_fprintf(f
, " %s %016" PRIx64
,
247 riscv_fpr_regnames
[i
], env
->fpr
[i
]);
249 qemu_fprintf(f
, "\n");
255 static void riscv_cpu_set_pc(CPUState
*cs
, vaddr value
)
257 RISCVCPU
*cpu
= RISCV_CPU(cs
);
258 CPURISCVState
*env
= &cpu
->env
;
262 static void riscv_cpu_synchronize_from_tb(CPUState
*cs
, TranslationBlock
*tb
)
264 RISCVCPU
*cpu
= RISCV_CPU(cs
);
265 CPURISCVState
*env
= &cpu
->env
;
269 static bool riscv_cpu_has_work(CPUState
*cs
)
271 #ifndef CONFIG_USER_ONLY
272 RISCVCPU
*cpu
= RISCV_CPU(cs
);
273 CPURISCVState
*env
= &cpu
->env
;
275 * Definition of the WFI instruction requires it to ignore the privilege
276 * mode and delegation registers, but respect individual enables
278 return (atomic_read(&env
->mip
) & env
->mie
) != 0;
284 void restore_state_to_opc(CPURISCVState
*env
, TranslationBlock
*tb
,
290 static void riscv_cpu_reset(CPUState
*cs
)
292 RISCVCPU
*cpu
= RISCV_CPU(cs
);
293 RISCVCPUClass
*mcc
= RISCV_CPU_GET_CLASS(cpu
);
294 CPURISCVState
*env
= &cpu
->env
;
296 mcc
->parent_reset(cs
);
297 #ifndef CONFIG_USER_ONLY
299 env
->mstatus
&= ~(MSTATUS_MIE
| MSTATUS_MPRV
);
301 env
->pc
= env
->resetvec
;
303 cs
->exception_index
= EXCP_NONE
;
305 set_default_nan_mode(1, &env
->fp_status
);
308 static void riscv_cpu_disas_set_info(CPUState
*s
, disassemble_info
*info
)
310 #if defined(TARGET_RISCV32)
311 info
->print_insn
= print_insn_riscv32
;
312 #elif defined(TARGET_RISCV64)
313 info
->print_insn
= print_insn_riscv64
;
317 static void riscv_cpu_realize(DeviceState
*dev
, Error
**errp
)
319 CPUState
*cs
= CPU(dev
);
320 RISCVCPU
*cpu
= RISCV_CPU(dev
);
321 CPURISCVState
*env
= &cpu
->env
;
322 RISCVCPUClass
*mcc
= RISCV_CPU_GET_CLASS(dev
);
323 int priv_version
= PRIV_VERSION_1_11_0
;
324 target_ulong target_misa
= 0;
325 Error
*local_err
= NULL
;
327 cpu_exec_realizefn(cs
, &local_err
);
328 if (local_err
!= NULL
) {
329 error_propagate(errp
, local_err
);
333 if (cpu
->cfg
.priv_spec
) {
334 if (!g_strcmp0(cpu
->cfg
.priv_spec
, "v1.11.0")) {
335 priv_version
= PRIV_VERSION_1_11_0
;
336 } else if (!g_strcmp0(cpu
->cfg
.priv_spec
, "v1.10.0")) {
337 priv_version
= PRIV_VERSION_1_10_0
;
338 } else if (!g_strcmp0(cpu
->cfg
.priv_spec
, "v1.9.1")) {
339 priv_version
= PRIV_VERSION_1_09_1
;
342 "Unsupported privilege spec version '%s'",
348 set_priv_version(env
, priv_version
);
349 set_resetvec(env
, DEFAULT_RSTVEC
);
352 set_feature(env
, RISCV_FEATURE_MMU
);
356 set_feature(env
, RISCV_FEATURE_PMP
);
359 /* If misa isn't set (rv32 and rv64 machines) set it here */
361 /* Do some ISA extension error checking */
362 if (cpu
->cfg
.ext_i
&& cpu
->cfg
.ext_e
) {
364 "I and E extensions are incompatible");
368 if (!cpu
->cfg
.ext_i
&& !cpu
->cfg
.ext_e
) {
370 "Either I or E extension must be set");
374 if (cpu
->cfg
.ext_g
&& !(cpu
->cfg
.ext_i
& cpu
->cfg
.ext_m
&
375 cpu
->cfg
.ext_a
& cpu
->cfg
.ext_f
&
377 warn_report("Setting G will also set IMAFD");
378 cpu
->cfg
.ext_i
= true;
379 cpu
->cfg
.ext_m
= true;
380 cpu
->cfg
.ext_a
= true;
381 cpu
->cfg
.ext_f
= true;
382 cpu
->cfg
.ext_d
= true;
385 /* Set the ISA extensions, checks should have happened above */
386 if (cpu
->cfg
.ext_i
) {
389 if (cpu
->cfg
.ext_e
) {
392 if (cpu
->cfg
.ext_m
) {
395 if (cpu
->cfg
.ext_a
) {
398 if (cpu
->cfg
.ext_f
) {
401 if (cpu
->cfg
.ext_d
) {
404 if (cpu
->cfg
.ext_c
) {
407 if (cpu
->cfg
.ext_s
) {
410 if (cpu
->cfg
.ext_u
) {
414 set_misa(env
, RVXLEN
| target_misa
);
417 riscv_cpu_register_gdb_regs_for_features(cs
);
422 mcc
->parent_realize(dev
, errp
);
425 static void riscv_cpu_init(Object
*obj
)
427 RISCVCPU
*cpu
= RISCV_CPU(obj
);
429 cpu_set_cpustate_pointers(cpu
);
432 static const VMStateDescription vmstate_riscv_cpu
= {
437 static Property riscv_cpu_properties
[] = {
438 DEFINE_PROP_BOOL("i", RISCVCPU
, cfg
.ext_i
, true),
439 DEFINE_PROP_BOOL("e", RISCVCPU
, cfg
.ext_e
, false),
440 DEFINE_PROP_BOOL("g", RISCVCPU
, cfg
.ext_g
, true),
441 DEFINE_PROP_BOOL("m", RISCVCPU
, cfg
.ext_m
, true),
442 DEFINE_PROP_BOOL("a", RISCVCPU
, cfg
.ext_a
, true),
443 DEFINE_PROP_BOOL("f", RISCVCPU
, cfg
.ext_f
, true),
444 DEFINE_PROP_BOOL("d", RISCVCPU
, cfg
.ext_d
, true),
445 DEFINE_PROP_BOOL("c", RISCVCPU
, cfg
.ext_c
, true),
446 DEFINE_PROP_BOOL("s", RISCVCPU
, cfg
.ext_s
, true),
447 DEFINE_PROP_BOOL("u", RISCVCPU
, cfg
.ext_u
, true),
448 DEFINE_PROP_BOOL("Counters", RISCVCPU
, cfg
.ext_counters
, true),
449 DEFINE_PROP_BOOL("Zifencei", RISCVCPU
, cfg
.ext_ifencei
, true),
450 DEFINE_PROP_BOOL("Zicsr", RISCVCPU
, cfg
.ext_icsr
, true),
451 DEFINE_PROP_STRING("priv_spec", RISCVCPU
, cfg
.priv_spec
),
452 DEFINE_PROP_BOOL("mmu", RISCVCPU
, cfg
.mmu
, true),
453 DEFINE_PROP_BOOL("pmp", RISCVCPU
, cfg
.pmp
, true),
454 DEFINE_PROP_END_OF_LIST(),
457 static void riscv_cpu_class_init(ObjectClass
*c
, void *data
)
459 RISCVCPUClass
*mcc
= RISCV_CPU_CLASS(c
);
460 CPUClass
*cc
= CPU_CLASS(c
);
461 DeviceClass
*dc
= DEVICE_CLASS(c
);
463 device_class_set_parent_realize(dc
, riscv_cpu_realize
,
464 &mcc
->parent_realize
);
466 mcc
->parent_reset
= cc
->reset
;
467 cc
->reset
= riscv_cpu_reset
;
469 cc
->class_by_name
= riscv_cpu_class_by_name
;
470 cc
->has_work
= riscv_cpu_has_work
;
471 cc
->do_interrupt
= riscv_cpu_do_interrupt
;
472 cc
->cpu_exec_interrupt
= riscv_cpu_exec_interrupt
;
473 cc
->dump_state
= riscv_cpu_dump_state
;
474 cc
->set_pc
= riscv_cpu_set_pc
;
475 cc
->synchronize_from_tb
= riscv_cpu_synchronize_from_tb
;
476 cc
->gdb_read_register
= riscv_cpu_gdb_read_register
;
477 cc
->gdb_write_register
= riscv_cpu_gdb_write_register
;
478 cc
->gdb_num_core_regs
= 33;
479 #if defined(TARGET_RISCV32)
480 cc
->gdb_core_xml_file
= "riscv-32bit-cpu.xml";
481 #elif defined(TARGET_RISCV64)
482 cc
->gdb_core_xml_file
= "riscv-64bit-cpu.xml";
484 cc
->gdb_stop_before_watchpoint
= true;
485 cc
->disas_set_info
= riscv_cpu_disas_set_info
;
486 #ifndef CONFIG_USER_ONLY
487 cc
->do_unassigned_access
= riscv_cpu_unassigned_access
;
488 cc
->do_unaligned_access
= riscv_cpu_do_unaligned_access
;
489 cc
->get_phys_page_debug
= riscv_cpu_get_phys_page_debug
;
492 cc
->tcg_initialize
= riscv_translate_init
;
493 cc
->tlb_fill
= riscv_cpu_tlb_fill
;
495 /* For now, mark unmigratable: */
496 cc
->vmsd
= &vmstate_riscv_cpu
;
497 dc
->props
= riscv_cpu_properties
;
500 char *riscv_isa_string(RISCVCPU
*cpu
)
503 const size_t maxlen
= sizeof("rv128") + sizeof(riscv_exts
) + 1;
504 char *isa_str
= g_new(char, maxlen
);
505 char *p
= isa_str
+ snprintf(isa_str
, maxlen
, "rv%d", TARGET_LONG_BITS
);
506 for (i
= 0; i
< sizeof(riscv_exts
); i
++) {
507 if (cpu
->env
.misa
& RV(riscv_exts
[i
])) {
508 *p
++ = qemu_tolower(riscv_exts
[i
]);
515 static gint
riscv_cpu_list_compare(gconstpointer a
, gconstpointer b
)
517 ObjectClass
*class_a
= (ObjectClass
*)a
;
518 ObjectClass
*class_b
= (ObjectClass
*)b
;
519 const char *name_a
, *name_b
;
521 name_a
= object_class_get_name(class_a
);
522 name_b
= object_class_get_name(class_b
);
523 return strcmp(name_a
, name_b
);
526 static void riscv_cpu_list_entry(gpointer data
, gpointer user_data
)
528 const char *typename
= object_class_get_name(OBJECT_CLASS(data
));
529 int len
= strlen(typename
) - strlen(RISCV_CPU_TYPE_SUFFIX
);
531 qemu_printf("%.*s\n", len
, typename
);
534 void riscv_cpu_list(void)
538 list
= object_class_get_list(TYPE_RISCV_CPU
, false);
539 list
= g_slist_sort(list
, riscv_cpu_list_compare
);
540 g_slist_foreach(list
, riscv_cpu_list_entry
, NULL
);
544 #define DEFINE_CPU(type_name, initfn) \
547 .parent = TYPE_RISCV_CPU, \
548 .instance_init = initfn \
551 static const TypeInfo riscv_cpu_type_infos
[] = {
553 .name
= TYPE_RISCV_CPU
,
555 .instance_size
= sizeof(RISCVCPU
),
556 .instance_init
= riscv_cpu_init
,
558 .class_size
= sizeof(RISCVCPUClass
),
559 .class_init
= riscv_cpu_class_init
,
561 DEFINE_CPU(TYPE_RISCV_CPU_ANY
, riscv_any_cpu_init
),
562 #if defined(TARGET_RISCV32)
563 DEFINE_CPU(TYPE_RISCV_CPU_BASE32
, riscv_base32_cpu_init
),
564 DEFINE_CPU(TYPE_RISCV_CPU_SIFIVE_E31
, rv32imacu_nommu_cpu_init
),
565 DEFINE_CPU(TYPE_RISCV_CPU_SIFIVE_U34
, rv32gcsu_priv1_10_0_cpu_init
),
567 DEFINE_CPU(TYPE_RISCV_CPU_RV32IMACU_NOMMU
, rv32imacu_nommu_cpu_init
),
568 DEFINE_CPU(TYPE_RISCV_CPU_RV32GCSU_V1_09_1
, rv32gcsu_priv1_09_1_cpu_init
),
569 DEFINE_CPU(TYPE_RISCV_CPU_RV32GCSU_V1_10_0
, rv32gcsu_priv1_10_0_cpu_init
)
570 #elif defined(TARGET_RISCV64)
571 DEFINE_CPU(TYPE_RISCV_CPU_BASE64
, riscv_base64_cpu_init
),
572 DEFINE_CPU(TYPE_RISCV_CPU_SIFIVE_E51
, rv64imacu_nommu_cpu_init
),
573 DEFINE_CPU(TYPE_RISCV_CPU_SIFIVE_U54
, rv64gcsu_priv1_10_0_cpu_init
),
575 DEFINE_CPU(TYPE_RISCV_CPU_RV64IMACU_NOMMU
, rv64imacu_nommu_cpu_init
),
576 DEFINE_CPU(TYPE_RISCV_CPU_RV64GCSU_V1_09_1
, rv64gcsu_priv1_09_1_cpu_init
),
577 DEFINE_CPU(TYPE_RISCV_CPU_RV64GCSU_V1_10_0
, rv64gcsu_priv1_10_0_cpu_init
)
581 DEFINE_TYPES(riscv_cpu_type_infos
)