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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 | ||
dc5bd18f MC |
23 | #include "qom/cpu.h" |
24 | #include "exec/cpu-defs.h" | |
25 | #include "fpu/softfloat.h" | |
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_RV32GCSU_V1_09_1 RISCV_CPU_TYPE_NAME("rv32gcsu-v1.9.1") |
39 | #define TYPE_RISCV_CPU_RV32GCSU_V1_10_0 RISCV_CPU_TYPE_NAME("rv32gcsu-v1.10.0") | |
40 | #define TYPE_RISCV_CPU_RV32IMACU_NOMMU RISCV_CPU_TYPE_NAME("rv32imacu-nommu") | |
41 | #define TYPE_RISCV_CPU_RV64GCSU_V1_09_1 RISCV_CPU_TYPE_NAME("rv64gcsu-v1.9.1") | |
42 | #define TYPE_RISCV_CPU_RV64GCSU_V1_10_0 RISCV_CPU_TYPE_NAME("rv64gcsu-v1.10.0") | |
43 | #define TYPE_RISCV_CPU_RV64IMACU_NOMMU RISCV_CPU_TYPE_NAME("rv64imacu-nommu") | |
44 | #define TYPE_RISCV_CPU_SIFIVE_E31 RISCV_CPU_TYPE_NAME("sifive-e31") | |
45 | #define TYPE_RISCV_CPU_SIFIVE_E51 RISCV_CPU_TYPE_NAME("sifive-e51") | |
46 | #define TYPE_RISCV_CPU_SIFIVE_U34 RISCV_CPU_TYPE_NAME("sifive-u34") | |
47 | #define TYPE_RISCV_CPU_SIFIVE_U54 RISCV_CPU_TYPE_NAME("sifive-u54") | |
48 | ||
49 | #define RV32 ((target_ulong)1 << (TARGET_LONG_BITS - 2)) | |
50 | #define RV64 ((target_ulong)2 << (TARGET_LONG_BITS - 2)) | |
51 | ||
52 | #if defined(TARGET_RISCV32) | |
53 | #define RVXLEN RV32 | |
54 | #elif defined(TARGET_RISCV64) | |
55 | #define RVXLEN RV64 | |
56 | #endif | |
57 | ||
58 | #define RV(x) ((target_ulong)1 << (x - 'A')) | |
59 | ||
60 | #define RVI RV('I') | |
79f86934 | 61 | #define RVE RV('E') /* E and I are mutually exclusive */ |
dc5bd18f MC |
62 | #define RVM RV('M') |
63 | #define RVA RV('A') | |
64 | #define RVF RV('F') | |
65 | #define RVD RV('D') | |
66 | #define RVC RV('C') | |
67 | #define RVS RV('S') | |
68 | #define RVU RV('U') | |
69 | ||
70 | /* S extension denotes that Supervisor mode exists, however it is possible | |
71 | to have a core that support S mode but does not have an MMU and there | |
72 | is currently no bit in misa to indicate whether an MMU exists or not | |
a88365c1 | 73 | so a cpu features bitfield is required, likewise for optional PMP support */ |
dc5bd18f | 74 | enum { |
a88365c1 | 75 | RISCV_FEATURE_MMU, |
f18637cd MC |
76 | RISCV_FEATURE_PMP, |
77 | RISCV_FEATURE_MISA | |
dc5bd18f MC |
78 | }; |
79 | ||
80 | #define USER_VERSION_2_02_0 0x00020200 | |
81 | #define PRIV_VERSION_1_09_1 0x00010901 | |
82 | #define PRIV_VERSION_1_10_0 0x00011000 | |
83 | ||
84 | #define TRANSLATE_FAIL 1 | |
85 | #define TRANSLATE_SUCCESS 0 | |
dc5bd18f MC |
86 | #define MMU_USER_IDX 3 |
87 | ||
88 | #define MAX_RISCV_PMPS (16) | |
89 | ||
90 | typedef struct CPURISCVState CPURISCVState; | |
91 | ||
92 | #include "pmp.h" | |
93 | ||
94 | struct CPURISCVState { | |
95 | target_ulong gpr[32]; | |
96 | uint64_t fpr[32]; /* assume both F and D extensions */ | |
97 | target_ulong pc; | |
98 | target_ulong load_res; | |
99 | target_ulong load_val; | |
100 | ||
101 | target_ulong frm; | |
102 | ||
103 | target_ulong badaddr; | |
104 | ||
105 | target_ulong user_ver; | |
106 | target_ulong priv_ver; | |
107 | target_ulong misa; | |
f18637cd | 108 | target_ulong misa_mask; |
dc5bd18f MC |
109 | |
110 | uint32_t features; | |
111 | ||
5836c3ec KC |
112 | #ifdef CONFIG_USER_ONLY |
113 | uint32_t elf_flags; | |
114 | #endif | |
115 | ||
dc5bd18f MC |
116 | #ifndef CONFIG_USER_ONLY |
117 | target_ulong priv; | |
118 | target_ulong resetvec; | |
119 | ||
120 | target_ulong mhartid; | |
121 | target_ulong mstatus; | |
85ba724f | 122 | |
dc5bd18f MC |
123 | /* |
124 | * CAUTION! Unlike the rest of this struct, mip is accessed asynchonously | |
85ba724f MC |
125 | * by I/O threads. It should be read with atomic_read. It should be updated |
126 | * using riscv_cpu_update_mip with the iothread mutex held. The iothread | |
127 | * mutex must be held because mip must be consistent with the CPU inturrept | |
128 | * state. riscv_cpu_update_mip calls cpu_interrupt or cpu_reset_interrupt | |
129 | * wuth the invariant that CPU_INTERRUPT_HARD is set iff mip is non-zero. | |
130 | * mip is 32-bits to allow atomic_read on 32-bit hosts. | |
dc5bd18f | 131 | */ |
85ba724f | 132 | uint32_t mip; |
e3e7039c | 133 | uint32_t miclaim; |
85ba724f | 134 | |
dc5bd18f MC |
135 | target_ulong mie; |
136 | target_ulong mideleg; | |
137 | ||
138 | target_ulong sptbr; /* until: priv-1.9.1 */ | |
139 | target_ulong satp; /* since: priv-1.10.0 */ | |
140 | target_ulong sbadaddr; | |
141 | target_ulong mbadaddr; | |
142 | target_ulong medeleg; | |
143 | ||
144 | target_ulong stvec; | |
145 | target_ulong sepc; | |
146 | target_ulong scause; | |
147 | ||
148 | target_ulong mtvec; | |
149 | target_ulong mepc; | |
150 | target_ulong mcause; | |
151 | target_ulong mtval; /* since: priv-1.10.0 */ | |
152 | ||
8c59f5c1 MC |
153 | target_ulong scounteren; |
154 | target_ulong mcounteren; | |
dc5bd18f MC |
155 | |
156 | target_ulong sscratch; | |
157 | target_ulong mscratch; | |
158 | ||
159 | /* temporary htif regs */ | |
160 | uint64_t mfromhost; | |
161 | uint64_t mtohost; | |
162 | uint64_t timecmp; | |
163 | ||
164 | /* physical memory protection */ | |
165 | pmp_table_t pmp_state; | |
753e3fe2 JW |
166 | |
167 | /* True if in debugger mode. */ | |
168 | bool debugger; | |
dc5bd18f MC |
169 | #endif |
170 | ||
171 | float_status fp_status; | |
172 | ||
dc5bd18f MC |
173 | /* Fields from here on are preserved across CPU reset. */ |
174 | QEMUTimer *timer; /* Internal timer */ | |
175 | }; | |
176 | ||
177 | #define RISCV_CPU_CLASS(klass) \ | |
178 | OBJECT_CLASS_CHECK(RISCVCPUClass, (klass), TYPE_RISCV_CPU) | |
179 | #define RISCV_CPU(obj) \ | |
180 | OBJECT_CHECK(RISCVCPU, (obj), TYPE_RISCV_CPU) | |
181 | #define RISCV_CPU_GET_CLASS(obj) \ | |
182 | OBJECT_GET_CLASS(RISCVCPUClass, (obj), TYPE_RISCV_CPU) | |
183 | ||
184 | /** | |
185 | * RISCVCPUClass: | |
186 | * @parent_realize: The parent class' realize handler. | |
187 | * @parent_reset: The parent class' reset handler. | |
188 | * | |
189 | * A RISCV CPU model. | |
190 | */ | |
191 | typedef struct RISCVCPUClass { | |
192 | /*< private >*/ | |
193 | CPUClass parent_class; | |
194 | /*< public >*/ | |
195 | DeviceRealize parent_realize; | |
196 | void (*parent_reset)(CPUState *cpu); | |
197 | } RISCVCPUClass; | |
198 | ||
199 | /** | |
200 | * RISCVCPU: | |
201 | * @env: #CPURISCVState | |
202 | * | |
203 | * A RISCV CPU. | |
204 | */ | |
205 | typedef struct RISCVCPU { | |
206 | /*< private >*/ | |
207 | CPUState parent_obj; | |
208 | /*< public >*/ | |
5b146dc7 | 209 | CPUNegativeOffsetState neg; |
dc5bd18f | 210 | CPURISCVState env; |
c4e95030 AF |
211 | |
212 | /* Configuration Settings */ | |
213 | struct { | |
b55d7d34 AF |
214 | bool ext_i; |
215 | bool ext_e; | |
216 | bool ext_g; | |
217 | bool ext_m; | |
218 | bool ext_a; | |
219 | bool ext_f; | |
220 | bool ext_d; | |
221 | bool ext_c; | |
222 | bool ext_s; | |
223 | bool ext_u; | |
224 | ||
c4e95030 AF |
225 | char *priv_spec; |
226 | char *user_spec; | |
227 | bool mmu; | |
228 | bool pmp; | |
229 | } cfg; | |
dc5bd18f MC |
230 | } RISCVCPU; |
231 | ||
dc5bd18f MC |
232 | static inline int riscv_has_ext(CPURISCVState *env, target_ulong ext) |
233 | { | |
234 | return (env->misa & ext) != 0; | |
235 | } | |
236 | ||
237 | static inline bool riscv_feature(CPURISCVState *env, int feature) | |
238 | { | |
239 | return env->features & (1ULL << feature); | |
240 | } | |
241 | ||
242 | #include "cpu_user.h" | |
243 | #include "cpu_bits.h" | |
244 | ||
245 | extern const char * const riscv_int_regnames[]; | |
246 | extern const char * const riscv_fpr_regnames[]; | |
247 | extern const char * const riscv_excp_names[]; | |
248 | extern const char * const riscv_intr_names[]; | |
249 | ||
dc5bd18f MC |
250 | void riscv_cpu_do_interrupt(CPUState *cpu); |
251 | int riscv_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg); | |
252 | int riscv_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg); | |
253 | bool riscv_cpu_exec_interrupt(CPUState *cs, int interrupt_request); | |
254 | int riscv_cpu_mmu_index(CPURISCVState *env, bool ifetch); | |
255 | hwaddr riscv_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr); | |
256 | void riscv_cpu_do_unaligned_access(CPUState *cs, vaddr addr, | |
257 | MMUAccessType access_type, int mmu_idx, | |
258 | uintptr_t retaddr); | |
8a4ca3c1 RH |
259 | bool riscv_cpu_tlb_fill(CPUState *cs, vaddr address, int size, |
260 | MMUAccessType access_type, int mmu_idx, | |
261 | bool probe, uintptr_t retaddr); | |
cbf58276 MC |
262 | void riscv_cpu_unassigned_access(CPUState *cpu, hwaddr addr, bool is_write, |
263 | bool is_exec, int unused, unsigned size); | |
dc5bd18f | 264 | char *riscv_isa_string(RISCVCPU *cpu); |
0442428a | 265 | void riscv_cpu_list(void); |
dc5bd18f | 266 | |
fb738839 | 267 | #define cpu_signal_handler riscv_cpu_signal_handler |
dc5bd18f MC |
268 | #define cpu_list riscv_cpu_list |
269 | #define cpu_mmu_index riscv_cpu_mmu_index | |
270 | ||
85ba724f | 271 | #ifndef CONFIG_USER_ONLY |
e3e7039c | 272 | int riscv_cpu_claim_interrupts(RISCVCPU *cpu, uint32_t interrupts); |
85ba724f MC |
273 | uint32_t riscv_cpu_update_mip(RISCVCPU *cpu, uint32_t mask, uint32_t value); |
274 | #define BOOL_TO_MASK(x) (-!!(x)) /* helper for riscv_cpu_update_mip value */ | |
275 | #endif | |
fb738839 | 276 | void riscv_cpu_set_mode(CPURISCVState *env, target_ulong newpriv); |
dc5bd18f MC |
277 | |
278 | void riscv_translate_init(void); | |
fb738839 MC |
279 | int riscv_cpu_signal_handler(int host_signum, void *pinfo, void *puc); |
280 | void QEMU_NORETURN riscv_raise_exception(CPURISCVState *env, | |
281 | uint32_t exception, uintptr_t pc); | |
dc5bd18f | 282 | |
fb738839 MC |
283 | target_ulong riscv_cpu_get_fflags(CPURISCVState *env); |
284 | void riscv_cpu_set_fflags(CPURISCVState *env, target_ulong); | |
dc5bd18f | 285 | |
83a71719 RH |
286 | #define TB_FLAGS_MMU_MASK 3 |
287 | #define TB_FLAGS_MSTATUS_FS MSTATUS_FS | |
dc5bd18f MC |
288 | |
289 | static inline void cpu_get_tb_cpu_state(CPURISCVState *env, target_ulong *pc, | |
290 | target_ulong *cs_base, uint32_t *flags) | |
291 | { | |
292 | *pc = env->pc; | |
293 | *cs_base = 0; | |
294 | #ifdef CONFIG_USER_ONLY | |
83a71719 | 295 | *flags = TB_FLAGS_MSTATUS_FS; |
dc5bd18f MC |
296 | #else |
297 | *flags = cpu_mmu_index(env, 0) | (env->mstatus & MSTATUS_FS); | |
298 | #endif | |
299 | } | |
300 | ||
c7b95171 MC |
301 | int riscv_csrrw(CPURISCVState *env, int csrno, target_ulong *ret_value, |
302 | target_ulong new_value, target_ulong write_mask); | |
753e3fe2 JW |
303 | int riscv_csrrw_debug(CPURISCVState *env, int csrno, target_ulong *ret_value, |
304 | target_ulong new_value, target_ulong write_mask); | |
c7b95171 | 305 | |
fb738839 MC |
306 | static inline void riscv_csr_write(CPURISCVState *env, int csrno, |
307 | target_ulong val) | |
c7b95171 MC |
308 | { |
309 | riscv_csrrw(env, csrno, NULL, val, MAKE_64BIT_MASK(0, TARGET_LONG_BITS)); | |
310 | } | |
311 | ||
fb738839 | 312 | static inline target_ulong riscv_csr_read(CPURISCVState *env, int csrno) |
c7b95171 MC |
313 | { |
314 | target_ulong val = 0; | |
315 | riscv_csrrw(env, csrno, &val, 0, 0); | |
316 | return val; | |
317 | } | |
318 | ||
319 | typedef int (*riscv_csr_predicate_fn)(CPURISCVState *env, int csrno); | |
320 | typedef int (*riscv_csr_read_fn)(CPURISCVState *env, int csrno, | |
321 | target_ulong *ret_value); | |
322 | typedef int (*riscv_csr_write_fn)(CPURISCVState *env, int csrno, | |
323 | target_ulong new_value); | |
324 | typedef int (*riscv_csr_op_fn)(CPURISCVState *env, int csrno, | |
325 | target_ulong *ret_value, target_ulong new_value, target_ulong write_mask); | |
326 | ||
327 | typedef struct { | |
a88365c1 | 328 | riscv_csr_predicate_fn predicate; |
c7b95171 MC |
329 | riscv_csr_read_fn read; |
330 | riscv_csr_write_fn write; | |
331 | riscv_csr_op_fn op; | |
332 | } riscv_csr_operations; | |
333 | ||
334 | void riscv_get_csr_ops(int csrno, riscv_csr_operations *ops); | |
335 | void riscv_set_csr_ops(int csrno, riscv_csr_operations *ops); | |
dc5bd18f | 336 | |
5371f5cd JW |
337 | void riscv_cpu_register_gdb_regs_for_features(CPUState *cs); |
338 | ||
4f7c64b3 | 339 | typedef CPURISCVState CPUArchState; |
2161a612 | 340 | typedef RISCVCPU ArchCPU; |
4f7c64b3 | 341 | |
dc5bd18f MC |
342 | #include "exec/cpu-all.h" |
343 | ||
344 | #endif /* RISCV_CPU_H */ |