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/>.
24 #include "exec/cpu-defs.h"
25 #include "fpu/softfloat.h"
27 #define TCG_GUEST_DEFAULT_MO 0
29 #define TYPE_RISCV_CPU "riscv-cpu"
31 #define RISCV_CPU_TYPE_SUFFIX "-" TYPE_RISCV_CPU
32 #define RISCV_CPU_TYPE_NAME(name) (name RISCV_CPU_TYPE_SUFFIX)
33 #define CPU_RESOLVING_TYPE TYPE_RISCV_CPU
35 #define TYPE_RISCV_CPU_ANY RISCV_CPU_TYPE_NAME("any")
36 #define TYPE_RISCV_CPU_BASE32 RISCV_CPU_TYPE_NAME("rv32")
37 #define TYPE_RISCV_CPU_BASE64 RISCV_CPU_TYPE_NAME("rv64")
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")
49 #define RV32 ((target_ulong)1 << (TARGET_LONG_BITS - 2))
50 #define RV64 ((target_ulong)2 << (TARGET_LONG_BITS - 2))
52 #if defined(TARGET_RISCV32)
54 #elif defined(TARGET_RISCV64)
58 #define RV(x) ((target_ulong)1 << (x - 'A'))
61 #define RVE RV('E') /* E and I are mutually exclusive */
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
73 so a cpu features bitfield is required, likewise for optional PMP support */
80 #define USER_VERSION_2_02_0 0x00020200
81 #define PRIV_VERSION_1_09_1 0x00010901
82 #define PRIV_VERSION_1_10_0 0x00011000
84 #define TRANSLATE_FAIL 1
85 #define TRANSLATE_SUCCESS 0
86 #define MMU_USER_IDX 3
88 #define MAX_RISCV_PMPS (16)
90 typedef struct CPURISCVState CPURISCVState;
94 struct CPURISCVState {
96 uint64_t fpr[32]; /* assume both F and D extensions */
98 target_ulong load_res;
99 target_ulong load_val;
103 target_ulong badaddr;
105 target_ulong user_ver;
106 target_ulong priv_ver;
108 target_ulong misa_mask;
112 #ifdef CONFIG_USER_ONLY
116 #ifndef CONFIG_USER_ONLY
118 target_ulong resetvec;
120 target_ulong mhartid;
121 target_ulong mstatus;
124 * CAUTION! Unlike the rest of this struct, mip is accessed asynchonously
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.
136 target_ulong mideleg;
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;
151 target_ulong mtval; /* since: priv-1.10.0 */
153 target_ulong scounteren;
154 target_ulong mcounteren;
156 target_ulong sscratch;
157 target_ulong mscratch;
159 /* temporary htif regs */
164 /* physical memory protection */
165 pmp_table_t pmp_state;
167 /* True if in debugger mode. */
171 float_status fp_status;
173 /* Fields from here on are preserved across CPU reset. */
174 QEMUTimer *timer; /* Internal timer */
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)
186 * @parent_realize: The parent class' realize handler.
187 * @parent_reset: The parent class' reset handler.
191 typedef struct RISCVCPUClass {
193 CPUClass parent_class;
195 DeviceRealize parent_realize;
196 void (*parent_reset)(CPUState *cpu);
201 * @env: #CPURISCVState
205 typedef struct RISCVCPU {
209 CPUNegativeOffsetState neg;
212 /* Configuration Settings */
221 static inline int riscv_has_ext(CPURISCVState *env, target_ulong ext)
223 return (env->misa & ext) != 0;
226 static inline bool riscv_feature(CPURISCVState *env, int feature)
228 return env->features & (1ULL << feature);
231 #include "cpu_user.h"
232 #include "cpu_bits.h"
234 extern const char * const riscv_int_regnames[];
235 extern const char * const riscv_fpr_regnames[];
236 extern const char * const riscv_excp_names[];
237 extern const char * const riscv_intr_names[];
239 void riscv_cpu_do_interrupt(CPUState *cpu);
240 int riscv_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg);
241 int riscv_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
242 bool riscv_cpu_exec_interrupt(CPUState *cs, int interrupt_request);
243 int riscv_cpu_mmu_index(CPURISCVState *env, bool ifetch);
244 hwaddr riscv_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
245 void riscv_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
246 MMUAccessType access_type, int mmu_idx,
248 bool riscv_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
249 MMUAccessType access_type, int mmu_idx,
250 bool probe, uintptr_t retaddr);
251 char *riscv_isa_string(RISCVCPU *cpu);
252 void riscv_cpu_list(void);
254 #define cpu_signal_handler riscv_cpu_signal_handler
255 #define cpu_list riscv_cpu_list
256 #define cpu_mmu_index riscv_cpu_mmu_index
258 #ifndef CONFIG_USER_ONLY
259 int riscv_cpu_claim_interrupts(RISCVCPU *cpu, uint32_t interrupts);
260 uint32_t riscv_cpu_update_mip(RISCVCPU *cpu, uint32_t mask, uint32_t value);
261 #define BOOL_TO_MASK(x) (-!!(x)) /* helper for riscv_cpu_update_mip value */
263 void riscv_cpu_set_mode(CPURISCVState *env, target_ulong newpriv);
265 void riscv_translate_init(void);
266 int riscv_cpu_signal_handler(int host_signum, void *pinfo, void *puc);
267 void QEMU_NORETURN riscv_raise_exception(CPURISCVState *env,
268 uint32_t exception, uintptr_t pc);
270 target_ulong riscv_cpu_get_fflags(CPURISCVState *env);
271 void riscv_cpu_set_fflags(CPURISCVState *env, target_ulong);
273 #define TB_FLAGS_MMU_MASK 3
274 #define TB_FLAGS_MSTATUS_FS MSTATUS_FS
276 static inline void cpu_get_tb_cpu_state(CPURISCVState *env, target_ulong *pc,
277 target_ulong *cs_base, uint32_t *flags)
281 #ifdef CONFIG_USER_ONLY
282 *flags = TB_FLAGS_MSTATUS_FS;
284 *flags = cpu_mmu_index(env, 0) | (env->mstatus & MSTATUS_FS);
288 int riscv_csrrw(CPURISCVState *env, int csrno, target_ulong *ret_value,
289 target_ulong new_value, target_ulong write_mask);
290 int riscv_csrrw_debug(CPURISCVState *env, int csrno, target_ulong *ret_value,
291 target_ulong new_value, target_ulong write_mask);
293 static inline void riscv_csr_write(CPURISCVState *env, int csrno,
296 riscv_csrrw(env, csrno, NULL, val, MAKE_64BIT_MASK(0, TARGET_LONG_BITS));
299 static inline target_ulong riscv_csr_read(CPURISCVState *env, int csrno)
301 target_ulong val = 0;
302 riscv_csrrw(env, csrno, &val, 0, 0);
306 typedef int (*riscv_csr_predicate_fn)(CPURISCVState *env, int csrno);
307 typedef int (*riscv_csr_read_fn)(CPURISCVState *env, int csrno,
308 target_ulong *ret_value);
309 typedef int (*riscv_csr_write_fn)(CPURISCVState *env, int csrno,
310 target_ulong new_value);
311 typedef int (*riscv_csr_op_fn)(CPURISCVState *env, int csrno,
312 target_ulong *ret_value, target_ulong new_value, target_ulong write_mask);
315 riscv_csr_predicate_fn predicate;
316 riscv_csr_read_fn read;
317 riscv_csr_write_fn write;
319 } riscv_csr_operations;
321 void riscv_get_csr_ops(int csrno, riscv_csr_operations *ops);
322 void riscv_set_csr_ops(int csrno, riscv_csr_operations *ops);
324 void riscv_cpu_register_gdb_regs_for_features(CPUState *cs);
326 typedef CPURISCVState CPUArchState;
327 typedef RISCVCPU ArchCPU;
329 #include "exec/cpu-all.h"
331 #endif /* RISCV_CPU_H */