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dc5bd18f MC |
1 | /* |
2 | * QEMU RISC-V CPU | |
3 | * | |
4 | * Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu | |
5 | * Copyright (c) 2017-2018 SiFive, Inc. | |
6 | * | |
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. | |
10 | * | |
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 | |
14 | * more details. | |
15 | * | |
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/>. | |
18 | */ | |
19 | ||
20 | #ifndef RISCV_CPU_H | |
21 | #define RISCV_CPU_H | |
22 | ||
2e5b09fd | 23 | #include "hw/core/cpu.h" |
dc5bd18f | 24 | #include "exec/cpu-defs.h" |
135b03cb | 25 | #include "fpu/softfloat-types.h" |
dc5bd18f | 26 | |
74433bf0 RH |
27 | #define TCG_GUEST_DEFAULT_MO 0 |
28 | ||
dc5bd18f MC |
29 | #define TYPE_RISCV_CPU "riscv-cpu" |
30 | ||
31 | #define RISCV_CPU_TYPE_SUFFIX "-" TYPE_RISCV_CPU | |
32 | #define RISCV_CPU_TYPE_NAME(name) (name RISCV_CPU_TYPE_SUFFIX) | |
0dacec87 | 33 | #define CPU_RESOLVING_TYPE TYPE_RISCV_CPU |
dc5bd18f MC |
34 | |
35 | #define TYPE_RISCV_CPU_ANY RISCV_CPU_TYPE_NAME("any") | |
8903bf6e AF |
36 | #define TYPE_RISCV_CPU_BASE32 RISCV_CPU_TYPE_NAME("rv32") |
37 | #define TYPE_RISCV_CPU_BASE64 RISCV_CPU_TYPE_NAME("rv64") | |
dc5bd18f MC |
38 | #define TYPE_RISCV_CPU_SIFIVE_E31 RISCV_CPU_TYPE_NAME("sifive-e31") |
39 | #define TYPE_RISCV_CPU_SIFIVE_E51 RISCV_CPU_TYPE_NAME("sifive-e51") | |
40 | #define TYPE_RISCV_CPU_SIFIVE_U34 RISCV_CPU_TYPE_NAME("sifive-u34") | |
41 | #define TYPE_RISCV_CPU_SIFIVE_U54 RISCV_CPU_TYPE_NAME("sifive-u54") | |
c1fb65e6 AF |
42 | /* Deprecated */ |
43 | #define TYPE_RISCV_CPU_RV32IMACU_NOMMU RISCV_CPU_TYPE_NAME("rv32imacu-nommu") | |
44 | #define TYPE_RISCV_CPU_RV32GCSU_V1_09_1 RISCV_CPU_TYPE_NAME("rv32gcsu-v1.9.1") | |
45 | #define TYPE_RISCV_CPU_RV32GCSU_V1_10_0 RISCV_CPU_TYPE_NAME("rv32gcsu-v1.10.0") | |
46 | #define TYPE_RISCV_CPU_RV64IMACU_NOMMU RISCV_CPU_TYPE_NAME("rv64imacu-nommu") | |
47 | #define TYPE_RISCV_CPU_RV64GCSU_V1_09_1 RISCV_CPU_TYPE_NAME("rv64gcsu-v1.9.1") | |
48 | #define TYPE_RISCV_CPU_RV64GCSU_V1_10_0 RISCV_CPU_TYPE_NAME("rv64gcsu-v1.10.0") | |
dc5bd18f MC |
49 | |
50 | #define RV32 ((target_ulong)1 << (TARGET_LONG_BITS - 2)) | |
51 | #define RV64 ((target_ulong)2 << (TARGET_LONG_BITS - 2)) | |
52 | ||
53 | #if defined(TARGET_RISCV32) | |
54 | #define RVXLEN RV32 | |
55 | #elif defined(TARGET_RISCV64) | |
56 | #define RVXLEN RV64 | |
57 | #endif | |
58 | ||
59 | #define RV(x) ((target_ulong)1 << (x - 'A')) | |
60 | ||
61 | #define RVI RV('I') | |
79f86934 | 62 | #define RVE RV('E') /* E and I are mutually exclusive */ |
dc5bd18f MC |
63 | #define RVM RV('M') |
64 | #define RVA RV('A') | |
65 | #define RVF RV('F') | |
66 | #define RVD RV('D') | |
67 | #define RVC RV('C') | |
68 | #define RVS RV('S') | |
69 | #define RVU RV('U') | |
af1fa003 | 70 | #define RVH RV('H') |
dc5bd18f MC |
71 | |
72 | /* S extension denotes that Supervisor mode exists, however it is possible | |
73 | to have a core that support S mode but does not have an MMU and there | |
74 | is currently no bit in misa to indicate whether an MMU exists or not | |
a88365c1 | 75 | so a cpu features bitfield is required, likewise for optional PMP support */ |
dc5bd18f | 76 | enum { |
a88365c1 | 77 | RISCV_FEATURE_MMU, |
f18637cd MC |
78 | RISCV_FEATURE_PMP, |
79 | RISCV_FEATURE_MISA | |
dc5bd18f MC |
80 | }; |
81 | ||
dc5bd18f MC |
82 | #define PRIV_VERSION_1_09_1 0x00010901 |
83 | #define PRIV_VERSION_1_10_0 0x00011000 | |
6729dbbd | 84 | #define PRIV_VERSION_1_11_0 0x00011100 |
dc5bd18f | 85 | |
1f447aec | 86 | #define TRANSLATE_PMP_FAIL 2 |
dc5bd18f MC |
87 | #define TRANSLATE_FAIL 1 |
88 | #define TRANSLATE_SUCCESS 0 | |
dc5bd18f MC |
89 | #define MMU_USER_IDX 3 |
90 | ||
91 | #define MAX_RISCV_PMPS (16) | |
92 | ||
93 | typedef struct CPURISCVState CPURISCVState; | |
94 | ||
95 | #include "pmp.h" | |
96 | ||
97 | struct CPURISCVState { | |
98 | target_ulong gpr[32]; | |
99 | uint64_t fpr[32]; /* assume both F and D extensions */ | |
100 | target_ulong pc; | |
101 | target_ulong load_res; | |
102 | target_ulong load_val; | |
103 | ||
104 | target_ulong frm; | |
105 | ||
106 | target_ulong badaddr; | |
107 | ||
dc5bd18f MC |
108 | target_ulong priv_ver; |
109 | target_ulong misa; | |
f18637cd | 110 | target_ulong misa_mask; |
dc5bd18f MC |
111 | |
112 | uint32_t features; | |
113 | ||
5836c3ec KC |
114 | #ifdef CONFIG_USER_ONLY |
115 | uint32_t elf_flags; | |
116 | #endif | |
117 | ||
dc5bd18f MC |
118 | #ifndef CONFIG_USER_ONLY |
119 | target_ulong priv; | |
ef6bb7b6 AF |
120 | /* This contains QEMU specific information about the virt state. */ |
121 | target_ulong virt; | |
dc5bd18f MC |
122 | target_ulong resetvec; |
123 | ||
124 | target_ulong mhartid; | |
125 | target_ulong mstatus; | |
85ba724f | 126 | |
02861613 | 127 | target_ulong mip; |
66e594f2 | 128 | |
e3e7039c | 129 | uint32_t miclaim; |
85ba724f | 130 | |
dc5bd18f MC |
131 | target_ulong mie; |
132 | target_ulong mideleg; | |
133 | ||
134 | target_ulong sptbr; /* until: priv-1.9.1 */ | |
135 | target_ulong satp; /* since: priv-1.10.0 */ | |
136 | target_ulong sbadaddr; | |
137 | target_ulong mbadaddr; | |
138 | target_ulong medeleg; | |
139 | ||
140 | target_ulong stvec; | |
141 | target_ulong sepc; | |
142 | target_ulong scause; | |
143 | ||
144 | target_ulong mtvec; | |
145 | target_ulong mepc; | |
146 | target_ulong mcause; | |
147 | target_ulong mtval; /* since: priv-1.10.0 */ | |
148 | ||
bd023ce3 AF |
149 | /* Hypervisor CSRs */ |
150 | target_ulong hstatus; | |
151 | target_ulong hedeleg; | |
152 | target_ulong hideleg; | |
153 | target_ulong hcounteren; | |
154 | target_ulong htval; | |
155 | target_ulong htinst; | |
156 | target_ulong hgatp; | |
157 | ||
158 | /* Virtual CSRs */ | |
159 | target_ulong vsstatus; | |
160 | target_ulong vstvec; | |
161 | target_ulong vsscratch; | |
162 | target_ulong vsepc; | |
163 | target_ulong vscause; | |
164 | target_ulong vstval; | |
165 | target_ulong vsatp; | |
166 | ||
167 | target_ulong mtval2; | |
168 | target_ulong mtinst; | |
169 | ||
66e594f2 AF |
170 | /* HS Backup CSRs */ |
171 | target_ulong stvec_hs; | |
172 | target_ulong sscratch_hs; | |
173 | target_ulong sepc_hs; | |
174 | target_ulong scause_hs; | |
175 | target_ulong stval_hs; | |
176 | target_ulong satp_hs; | |
177 | target_ulong mstatus_hs; | |
178 | ||
8c59f5c1 MC |
179 | target_ulong scounteren; |
180 | target_ulong mcounteren; | |
dc5bd18f MC |
181 | |
182 | target_ulong sscratch; | |
183 | target_ulong mscratch; | |
184 | ||
185 | /* temporary htif regs */ | |
186 | uint64_t mfromhost; | |
187 | uint64_t mtohost; | |
188 | uint64_t timecmp; | |
189 | ||
190 | /* physical memory protection */ | |
191 | pmp_table_t pmp_state; | |
753e3fe2 JW |
192 | |
193 | /* True if in debugger mode. */ | |
194 | bool debugger; | |
dc5bd18f MC |
195 | #endif |
196 | ||
197 | float_status fp_status; | |
198 | ||
dc5bd18f MC |
199 | /* Fields from here on are preserved across CPU reset. */ |
200 | QEMUTimer *timer; /* Internal timer */ | |
201 | }; | |
202 | ||
203 | #define RISCV_CPU_CLASS(klass) \ | |
204 | OBJECT_CLASS_CHECK(RISCVCPUClass, (klass), TYPE_RISCV_CPU) | |
205 | #define RISCV_CPU(obj) \ | |
206 | OBJECT_CHECK(RISCVCPU, (obj), TYPE_RISCV_CPU) | |
207 | #define RISCV_CPU_GET_CLASS(obj) \ | |
208 | OBJECT_GET_CLASS(RISCVCPUClass, (obj), TYPE_RISCV_CPU) | |
209 | ||
210 | /** | |
211 | * RISCVCPUClass: | |
212 | * @parent_realize: The parent class' realize handler. | |
213 | * @parent_reset: The parent class' reset handler. | |
214 | * | |
215 | * A RISCV CPU model. | |
216 | */ | |
217 | typedef struct RISCVCPUClass { | |
218 | /*< private >*/ | |
219 | CPUClass parent_class; | |
220 | /*< public >*/ | |
221 | DeviceRealize parent_realize; | |
222 | void (*parent_reset)(CPUState *cpu); | |
223 | } RISCVCPUClass; | |
224 | ||
225 | /** | |
226 | * RISCVCPU: | |
227 | * @env: #CPURISCVState | |
228 | * | |
229 | * A RISCV CPU. | |
230 | */ | |
231 | typedef struct RISCVCPU { | |
232 | /*< private >*/ | |
233 | CPUState parent_obj; | |
234 | /*< public >*/ | |
5b146dc7 | 235 | CPUNegativeOffsetState neg; |
dc5bd18f | 236 | CPURISCVState env; |
c4e95030 AF |
237 | |
238 | /* Configuration Settings */ | |
239 | struct { | |
b55d7d34 AF |
240 | bool ext_i; |
241 | bool ext_e; | |
242 | bool ext_g; | |
243 | bool ext_m; | |
244 | bool ext_a; | |
245 | bool ext_f; | |
246 | bool ext_d; | |
247 | bool ext_c; | |
248 | bool ext_s; | |
249 | bool ext_u; | |
0a13a5b8 | 250 | bool ext_counters; |
50fba816 | 251 | bool ext_ifencei; |
591bddea | 252 | bool ext_icsr; |
b55d7d34 | 253 | |
c4e95030 AF |
254 | char *priv_spec; |
255 | char *user_spec; | |
256 | bool mmu; | |
257 | bool pmp; | |
258 | } cfg; | |
dc5bd18f MC |
259 | } RISCVCPU; |
260 | ||
dc5bd18f MC |
261 | static inline int riscv_has_ext(CPURISCVState *env, target_ulong ext) |
262 | { | |
263 | return (env->misa & ext) != 0; | |
264 | } | |
265 | ||
266 | static inline bool riscv_feature(CPURISCVState *env, int feature) | |
267 | { | |
268 | return env->features & (1ULL << feature); | |
269 | } | |
270 | ||
271 | #include "cpu_user.h" | |
272 | #include "cpu_bits.h" | |
273 | ||
274 | extern const char * const riscv_int_regnames[]; | |
275 | extern const char * const riscv_fpr_regnames[]; | |
276 | extern const char * const riscv_excp_names[]; | |
277 | extern const char * const riscv_intr_names[]; | |
278 | ||
dc5bd18f MC |
279 | void riscv_cpu_do_interrupt(CPUState *cpu); |
280 | int riscv_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg); | |
281 | int riscv_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg); | |
282 | bool riscv_cpu_exec_interrupt(CPUState *cs, int interrupt_request); | |
b345b480 | 283 | bool riscv_cpu_fp_enabled(CPURISCVState *env); |
ef6bb7b6 AF |
284 | bool riscv_cpu_virt_enabled(CPURISCVState *env); |
285 | void riscv_cpu_set_virt_enabled(CPURISCVState *env, bool enable); | |
c7b1bbc8 AF |
286 | bool riscv_cpu_force_hs_excep_enabled(CPURISCVState *env); |
287 | void riscv_cpu_set_force_hs_excep(CPURISCVState *env, bool enable); | |
dc5bd18f MC |
288 | int riscv_cpu_mmu_index(CPURISCVState *env, bool ifetch); |
289 | hwaddr riscv_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr); | |
290 | void riscv_cpu_do_unaligned_access(CPUState *cs, vaddr addr, | |
291 | MMUAccessType access_type, int mmu_idx, | |
292 | uintptr_t retaddr); | |
8a4ca3c1 RH |
293 | bool riscv_cpu_tlb_fill(CPUState *cs, vaddr address, int size, |
294 | MMUAccessType access_type, int mmu_idx, | |
295 | bool probe, uintptr_t retaddr); | |
37207e12 PD |
296 | void riscv_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr, |
297 | vaddr addr, unsigned size, | |
298 | MMUAccessType access_type, | |
299 | int mmu_idx, MemTxAttrs attrs, | |
300 | MemTxResult response, uintptr_t retaddr); | |
dc5bd18f | 301 | char *riscv_isa_string(RISCVCPU *cpu); |
0442428a | 302 | void riscv_cpu_list(void); |
dc5bd18f | 303 | |
fb738839 | 304 | #define cpu_signal_handler riscv_cpu_signal_handler |
dc5bd18f MC |
305 | #define cpu_list riscv_cpu_list |
306 | #define cpu_mmu_index riscv_cpu_mmu_index | |
307 | ||
85ba724f | 308 | #ifndef CONFIG_USER_ONLY |
66e594f2 | 309 | void riscv_cpu_swap_hypervisor_regs(CPURISCVState *env); |
e3e7039c | 310 | int riscv_cpu_claim_interrupts(RISCVCPU *cpu, uint32_t interrupts); |
85ba724f MC |
311 | uint32_t riscv_cpu_update_mip(RISCVCPU *cpu, uint32_t mask, uint32_t value); |
312 | #define BOOL_TO_MASK(x) (-!!(x)) /* helper for riscv_cpu_update_mip value */ | |
313 | #endif | |
fb738839 | 314 | void riscv_cpu_set_mode(CPURISCVState *env, target_ulong newpriv); |
dc5bd18f MC |
315 | |
316 | void riscv_translate_init(void); | |
fb738839 MC |
317 | int riscv_cpu_signal_handler(int host_signum, void *pinfo, void *puc); |
318 | void QEMU_NORETURN riscv_raise_exception(CPURISCVState *env, | |
319 | uint32_t exception, uintptr_t pc); | |
dc5bd18f | 320 | |
fb738839 MC |
321 | target_ulong riscv_cpu_get_fflags(CPURISCVState *env); |
322 | void riscv_cpu_set_fflags(CPURISCVState *env, target_ulong); | |
dc5bd18f | 323 | |
83a71719 RH |
324 | #define TB_FLAGS_MMU_MASK 3 |
325 | #define TB_FLAGS_MSTATUS_FS MSTATUS_FS | |
dc5bd18f MC |
326 | |
327 | static inline void cpu_get_tb_cpu_state(CPURISCVState *env, target_ulong *pc, | |
328 | target_ulong *cs_base, uint32_t *flags) | |
329 | { | |
330 | *pc = env->pc; | |
331 | *cs_base = 0; | |
332 | #ifdef CONFIG_USER_ONLY | |
83a71719 | 333 | *flags = TB_FLAGS_MSTATUS_FS; |
dc5bd18f | 334 | #else |
e28eaed8 AF |
335 | *flags = cpu_mmu_index(env, 0); |
336 | if (riscv_cpu_fp_enabled(env)) { | |
337 | *flags |= env->mstatus & MSTATUS_FS; | |
338 | } | |
dc5bd18f MC |
339 | #endif |
340 | } | |
341 | ||
c7b95171 MC |
342 | int riscv_csrrw(CPURISCVState *env, int csrno, target_ulong *ret_value, |
343 | target_ulong new_value, target_ulong write_mask); | |
753e3fe2 JW |
344 | int riscv_csrrw_debug(CPURISCVState *env, int csrno, target_ulong *ret_value, |
345 | target_ulong new_value, target_ulong write_mask); | |
c7b95171 | 346 | |
fb738839 MC |
347 | static inline void riscv_csr_write(CPURISCVState *env, int csrno, |
348 | target_ulong val) | |
c7b95171 MC |
349 | { |
350 | riscv_csrrw(env, csrno, NULL, val, MAKE_64BIT_MASK(0, TARGET_LONG_BITS)); | |
351 | } | |
352 | ||
fb738839 | 353 | static inline target_ulong riscv_csr_read(CPURISCVState *env, int csrno) |
c7b95171 MC |
354 | { |
355 | target_ulong val = 0; | |
356 | riscv_csrrw(env, csrno, &val, 0, 0); | |
357 | return val; | |
358 | } | |
359 | ||
360 | typedef int (*riscv_csr_predicate_fn)(CPURISCVState *env, int csrno); | |
361 | typedef int (*riscv_csr_read_fn)(CPURISCVState *env, int csrno, | |
362 | target_ulong *ret_value); | |
363 | typedef int (*riscv_csr_write_fn)(CPURISCVState *env, int csrno, | |
364 | target_ulong new_value); | |
365 | typedef int (*riscv_csr_op_fn)(CPURISCVState *env, int csrno, | |
366 | target_ulong *ret_value, target_ulong new_value, target_ulong write_mask); | |
367 | ||
368 | typedef struct { | |
a88365c1 | 369 | riscv_csr_predicate_fn predicate; |
c7b95171 MC |
370 | riscv_csr_read_fn read; |
371 | riscv_csr_write_fn write; | |
372 | riscv_csr_op_fn op; | |
373 | } riscv_csr_operations; | |
374 | ||
375 | void riscv_get_csr_ops(int csrno, riscv_csr_operations *ops); | |
376 | void riscv_set_csr_ops(int csrno, riscv_csr_operations *ops); | |
dc5bd18f | 377 | |
5371f5cd JW |
378 | void riscv_cpu_register_gdb_regs_for_features(CPUState *cs); |
379 | ||
4f7c64b3 | 380 | typedef CPURISCVState CPUArchState; |
2161a612 | 381 | typedef RISCVCPU ArchCPU; |
4f7c64b3 | 382 | |
dc5bd18f MC |
383 | #include "exec/cpu-all.h" |
384 | ||
385 | #endif /* RISCV_CPU_H */ |