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/>.
23 #include "hw/core/cpu.h"
24 #include "hw/registerfields.h"
25 #include "exec/cpu-defs.h"
26 #include "fpu/softfloat-types.h"
27 #include "qom/object.h"
30 #define TCG_GUEST_DEFAULT_MO 0
32 #define TYPE_RISCV_CPU "riscv-cpu"
34 #define RISCV_CPU_TYPE_SUFFIX "-" TYPE_RISCV_CPU
35 #define RISCV_CPU_TYPE_NAME(name) (name RISCV_CPU_TYPE_SUFFIX)
36 #define CPU_RESOLVING_TYPE TYPE_RISCV_CPU
38 #define TYPE_RISCV_CPU_ANY RISCV_CPU_TYPE_NAME("any")
39 #define TYPE_RISCV_CPU_BASE32 RISCV_CPU_TYPE_NAME("rv32")
40 #define TYPE_RISCV_CPU_BASE64 RISCV_CPU_TYPE_NAME("rv64")
41 #define TYPE_RISCV_CPU_IBEX RISCV_CPU_TYPE_NAME("lowrisc-ibex")
42 #define TYPE_RISCV_CPU_SHAKTI_C RISCV_CPU_TYPE_NAME("shakti-c")
43 #define TYPE_RISCV_CPU_SIFIVE_E31 RISCV_CPU_TYPE_NAME("sifive-e31")
44 #define TYPE_RISCV_CPU_SIFIVE_E34 RISCV_CPU_TYPE_NAME("sifive-e34")
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 #if defined(TARGET_RISCV32)
50 # define TYPE_RISCV_CPU_BASE TYPE_RISCV_CPU_BASE32
51 #elif defined(TARGET_RISCV64)
52 # define TYPE_RISCV_CPU_BASE TYPE_RISCV_CPU_BASE64
55 #define RV(x) ((target_ulong)1 << (x - 'A'))
58 #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 */
81 #define PRIV_VERSION_1_10_0 0x00011000
82 #define PRIV_VERSION_1_11_0 0x00011100
84 #define VEXT_VERSION_0_07_1 0x00000701
90 TRANSLATE_G_STAGE_FAIL
93 #define MMU_USER_IDX 3
95 #define MAX_RISCV_PMPS (16)
97 typedef struct CPURISCVState CPURISCVState;
99 #if !defined(CONFIG_USER_ONLY)
103 #define RV_VLEN_MAX 256
105 FIELD(VTYPE, VLMUL, 0, 2)
106 FIELD(VTYPE, VSEW, 2, 3)
107 FIELD(VTYPE, VEDIV, 5, 2)
108 FIELD(VTYPE, RESERVED, 7, sizeof(target_ulong) * 8 - 9)
109 FIELD(VTYPE, VILL, sizeof(target_ulong) * 8 - 1, 1)
111 struct CPURISCVState {
112 target_ulong gpr[32];
113 uint64_t fpr[32]; /* assume both F and D extensions */
115 /* vector coprocessor state. */
116 uint64_t vreg[32 * RV_VLEN_MAX / 64] QEMU_ALIGNED(16);
124 target_ulong load_res;
125 target_ulong load_val;
129 target_ulong badaddr;
130 target_ulong guest_phys_fault_addr;
132 target_ulong priv_ver;
133 target_ulong bext_ver;
134 target_ulong vext_ver;
136 /* RISCVMXL, but uint32_t for vmstate migration */
137 uint32_t misa_mxl; /* current mxl */
138 uint32_t misa_mxl_max; /* max mxl for this cpu */
139 uint32_t misa_ext; /* current extensions */
140 uint32_t misa_ext_mask; /* max ext for this cpu */
144 #ifdef CONFIG_USER_ONLY
148 #ifndef CONFIG_USER_ONLY
150 /* This contains QEMU specific information about the virt state. */
152 target_ulong resetvec;
154 target_ulong mhartid;
156 * For RV32 this is 32-bit mstatus and 32-bit mstatush.
157 * For RV64 this is a 64-bit mstatus.
166 target_ulong mideleg;
168 target_ulong satp; /* since: priv-1.10.0 */
170 target_ulong medeleg;
179 target_ulong mtval; /* since: priv-1.10.0 */
181 /* Hypervisor CSRs */
182 target_ulong hstatus;
183 target_ulong hedeleg;
184 target_ulong hideleg;
185 target_ulong hcounteren;
193 * For RV32 this is 32-bit vsstatus and 32-bit vsstatush.
194 * For RV64 this is a 64-bit vsstatus.
198 target_ulong vsscratch;
200 target_ulong vscause;
208 target_ulong stvec_hs;
209 target_ulong sscratch_hs;
210 target_ulong sepc_hs;
211 target_ulong scause_hs;
212 target_ulong stval_hs;
213 target_ulong satp_hs;
216 /* Signals whether the current exception occurred with two-stage address
217 translation active. */
218 bool two_stage_lookup;
220 target_ulong scounteren;
221 target_ulong mcounteren;
223 target_ulong sscratch;
224 target_ulong mscratch;
226 /* temporary htif regs */
231 /* physical memory protection */
232 pmp_table_t pmp_state;
233 target_ulong mseccfg;
235 /* machine specific rdtime callback */
236 uint64_t (*rdtime_fn)(uint32_t);
237 uint32_t rdtime_fn_arg;
239 /* True if in debugger mode. */
243 * CSRs for PointerMasking extension
246 target_ulong mpmmask;
247 target_ulong mpmbase;
248 target_ulong spmmask;
249 target_ulong spmbase;
250 target_ulong upmmask;
251 target_ulong upmbase;
254 float_status fp_status;
256 /* Fields from here on are preserved across CPU reset. */
257 QEMUTimer *timer; /* Internal timer */
260 OBJECT_DECLARE_TYPE(RISCVCPU, RISCVCPUClass,
265 * @parent_realize: The parent class' realize handler.
266 * @parent_reset: The parent class' reset handler.
270 struct RISCVCPUClass {
272 CPUClass parent_class;
274 DeviceRealize parent_realize;
275 DeviceReset parent_reset;
280 * @env: #CPURISCVState
288 CPUNegativeOffsetState neg;
293 /* Configuration Settings */
330 static inline int riscv_has_ext(CPURISCVState *env, target_ulong ext)
332 return (env->misa_ext & ext) != 0;
335 static inline bool riscv_feature(CPURISCVState *env, int feature)
337 return env->features & (1ULL << feature);
340 #include "cpu_user.h"
342 extern const char * const riscv_int_regnames[];
343 extern const char * const riscv_fpr_regnames[];
345 const char *riscv_cpu_get_trap_name(target_ulong cause, bool async);
346 void riscv_cpu_do_interrupt(CPUState *cpu);
347 int riscv_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs,
348 int cpuid, void *opaque);
349 int riscv_cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cs,
350 int cpuid, void *opaque);
351 int riscv_cpu_gdb_read_register(CPUState *cpu, GByteArray *buf, int reg);
352 int riscv_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
353 bool riscv_cpu_fp_enabled(CPURISCVState *env);
354 bool riscv_cpu_virt_enabled(CPURISCVState *env);
355 void riscv_cpu_set_virt_enabled(CPURISCVState *env, bool enable);
356 bool riscv_cpu_two_stage_lookup(int mmu_idx);
357 int riscv_cpu_mmu_index(CPURISCVState *env, bool ifetch);
358 hwaddr riscv_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
359 void riscv_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
360 MMUAccessType access_type, int mmu_idx,
361 uintptr_t retaddr) QEMU_NORETURN;
362 bool riscv_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
363 MMUAccessType access_type, int mmu_idx,
364 bool probe, uintptr_t retaddr);
365 void riscv_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr,
366 vaddr addr, unsigned size,
367 MMUAccessType access_type,
368 int mmu_idx, MemTxAttrs attrs,
369 MemTxResult response, uintptr_t retaddr);
370 char *riscv_isa_string(RISCVCPU *cpu);
371 void riscv_cpu_list(void);
373 #define cpu_list riscv_cpu_list
374 #define cpu_mmu_index riscv_cpu_mmu_index
376 #ifndef CONFIG_USER_ONLY
377 bool riscv_cpu_exec_interrupt(CPUState *cs, int interrupt_request);
378 void riscv_cpu_swap_hypervisor_regs(CPURISCVState *env);
379 int riscv_cpu_claim_interrupts(RISCVCPU *cpu, uint32_t interrupts);
380 uint32_t riscv_cpu_update_mip(RISCVCPU *cpu, uint32_t mask, uint32_t value);
381 #define BOOL_TO_MASK(x) (-!!(x)) /* helper for riscv_cpu_update_mip value */
382 void riscv_cpu_set_rdtime_fn(CPURISCVState *env, uint64_t (*fn)(uint32_t),
385 void riscv_cpu_set_mode(CPURISCVState *env, target_ulong newpriv);
387 void riscv_translate_init(void);
388 void QEMU_NORETURN riscv_raise_exception(CPURISCVState *env,
389 uint32_t exception, uintptr_t pc);
391 target_ulong riscv_cpu_get_fflags(CPURISCVState *env);
392 void riscv_cpu_set_fflags(CPURISCVState *env, target_ulong);
394 #define TB_FLAGS_PRIV_MMU_MASK 3
395 #define TB_FLAGS_PRIV_HYP_ACCESS_MASK (1 << 2)
396 #define TB_FLAGS_MSTATUS_FS MSTATUS_FS
398 typedef CPURISCVState CPUArchState;
399 typedef RISCVCPU ArchCPU;
400 #include "exec/cpu-all.h"
402 FIELD(TB_FLAGS, MEM_IDX, 0, 3)
403 FIELD(TB_FLAGS, VL_EQ_VLMAX, 3, 1)
404 FIELD(TB_FLAGS, LMUL, 4, 2)
405 FIELD(TB_FLAGS, SEW, 6, 3)
406 FIELD(TB_FLAGS, VILL, 9, 1)
407 /* Is a Hypervisor instruction load/store allowed? */
408 FIELD(TB_FLAGS, HLSX, 10, 1)
409 FIELD(TB_FLAGS, MSTATUS_HS_FS, 11, 2)
410 /* The combination of MXL/SXL/UXL that applies to the current cpu mode. */
411 FIELD(TB_FLAGS, XL, 13, 2)
412 /* If PointerMasking should be applied */
413 FIELD(TB_FLAGS, PM_ENABLED, 15, 1)
415 #ifdef TARGET_RISCV32
416 #define riscv_cpu_mxl(env) ((void)(env), MXL_RV32)
418 static inline RISCVMXL riscv_cpu_mxl(CPURISCVState *env)
420 return env->misa_mxl;
425 * A simplification for VLMAX
426 * = (1 << LMUL) * VLEN / (8 * (1 << SEW))
427 * = (VLEN << LMUL) / (8 << SEW)
428 * = (VLEN << LMUL) >> (SEW + 3)
429 * = VLEN >> (SEW + 3 - LMUL)
431 static inline uint32_t vext_get_vlmax(RISCVCPU *cpu, target_ulong vtype)
435 sew = FIELD_EX64(vtype, VTYPE, VSEW);
436 lmul = FIELD_EX64(vtype, VTYPE, VLMUL);
437 return cpu->cfg.vlen >> (sew + 3 - lmul);
440 void cpu_get_tb_cpu_state(CPURISCVState *env, target_ulong *pc,
441 target_ulong *cs_base, uint32_t *pflags);
443 RISCVException riscv_csrrw(CPURISCVState *env, int csrno,
444 target_ulong *ret_value,
445 target_ulong new_value, target_ulong write_mask);
446 RISCVException riscv_csrrw_debug(CPURISCVState *env, int csrno,
447 target_ulong *ret_value,
448 target_ulong new_value,
449 target_ulong write_mask);
451 static inline void riscv_csr_write(CPURISCVState *env, int csrno,
454 riscv_csrrw(env, csrno, NULL, val, MAKE_64BIT_MASK(0, TARGET_LONG_BITS));
457 static inline target_ulong riscv_csr_read(CPURISCVState *env, int csrno)
459 target_ulong val = 0;
460 riscv_csrrw(env, csrno, &val, 0, 0);
464 typedef RISCVException (*riscv_csr_predicate_fn)(CPURISCVState *env,
466 typedef RISCVException (*riscv_csr_read_fn)(CPURISCVState *env, int csrno,
467 target_ulong *ret_value);
468 typedef RISCVException (*riscv_csr_write_fn)(CPURISCVState *env, int csrno,
469 target_ulong new_value);
470 typedef RISCVException (*riscv_csr_op_fn)(CPURISCVState *env, int csrno,
471 target_ulong *ret_value,
472 target_ulong new_value,
473 target_ulong write_mask);
477 riscv_csr_predicate_fn predicate;
478 riscv_csr_read_fn read;
479 riscv_csr_write_fn write;
481 } riscv_csr_operations;
483 /* CSR function table constants */
485 CSR_TABLE_SIZE = 0x1000
488 /* CSR function table */
489 extern riscv_csr_operations csr_ops[CSR_TABLE_SIZE];
491 void riscv_get_csr_ops(int csrno, riscv_csr_operations *ops);
492 void riscv_set_csr_ops(int csrno, riscv_csr_operations *ops);
494 void riscv_cpu_register_gdb_regs_for_features(CPUState *cs);
496 #endif /* RISCV_CPU_H */