10 #include "softfloat.h"
11 #include "platform.h" // softfloat isNaNF32UI, etc.
12 #include "internals.h" // ditto
14 processor_t::processor_t(sim_t
* _sim
, char* _mem
, size_t _memsz
)
15 : sim(_sim
), mmu(_mem
,_memsz
)
17 memset(XPR
,0,sizeof(XPR
));
18 memset(FPR
,0,sizeof(FPR
));
30 set_sr(SR_S
| SR_SX
); // SX ignored if 64b mode not supported
33 memset(counters
,0,sizeof(counters
));
35 // a few assumptions about endianness, including freg_t union
36 static_assert(BYTE_ORDER
== LITTLE_ENDIAN
);
37 static_assert(sizeof(freg_t
) == 8);
38 static_assert(sizeof(reg_t
) == 8);
40 static_assert(sizeof(insn_t
) == 4);
41 static_assert(sizeof(uint128_t
) == 16 && sizeof(int128_t
) == 16);
44 void processor_t::init(uint32_t _id
)
49 void processor_t::set_sr(uint32_t val
)
52 #ifndef RISCV_ENABLE_64BIT
53 sr
&= ~(SR_SX
| SR_UX
);
55 #ifndef RISCV_ENABLE_FPU
58 #ifdef RISCV_ENABLE_RVC
62 xprlen
= ((sr
& SR_S
) ? (sr
& SR_SX
) : (sr
& SR_UX
)) ? 64 : 32;
65 void processor_t::set_fsr(uint32_t val
)
67 fsr
= val
& ~FSR_ZERO
;
70 void processor_t::step(size_t n
, bool noisy
)
77 uint32_t interrupts
= (cause
& CAUSE_IP
) >> CAUSE_IP_SHIFT
;
78 interrupts
&= (sr
& SR_IM
) >> SR_IM_SHIFT
;
79 if(interrupts
&& (sr
& SR_ET
))
80 take_trap(trap_interrupt
,noisy
);
82 insn_t insn
= mmu
.load_insn(pc
, rvc_mode
);
84 reg_t npc
= pc
+ insn_length(insn
);
94 if(count
++ == compare
)
95 cause
|= 1 << (TIMER_IRQ
+CAUSE_IP_SHIFT
);
106 void processor_t::take_trap(trap_t t
, bool noisy
)
108 demand(t
< NUM_TRAPS
, "internal error: bad trap number %d", int(t
));
109 demand(sr
& SR_ET
, "error mode on core %d!\ntrap %s, pc 0x%016llx",
110 id
, trap_name(t
), (unsigned long long)pc
);
112 printf("core %3d: trap %s, pc 0x%016llx\n",
113 id
, trap_name(t
), (unsigned long long)pc
);
115 set_sr((((sr
& ~SR_ET
) | SR_S
) & ~SR_PS
) | ((sr
& SR_S
) ? SR_PS
: 0));
116 cause
= (cause
& ~CAUSE_EXCCODE
) | (t
<< CAUSE_EXCCODE_SHIFT
);
119 badvaddr
= mmu
.get_badvaddr();
122 void processor_t::disasm(insn_t insn
, reg_t pc
)
124 printf("core %3d: 0x%016llx (0x%08x) ",id
,(unsigned long long)pc
,insn
.bits
);
126 #ifdef RISCV_HAVE_LIBOPCODES
127 disassemble_info info
;
128 INIT_DISASSEMBLE_INFO(info
, stdout
, fprintf
);
129 info
.flavour
= bfd_target_unknown_flavour
;
130 info
.arch
= bfd_arch_mips
;
131 info
.mach
= 101; // XXX bfd_mach_mips_riscv requires modified bfd.h
132 info
.endian
= BFD_ENDIAN_LITTLE
;
133 info
.buffer
= (bfd_byte
*)&insn
;
134 info
.buffer_length
= sizeof(insn
);
135 info
.buffer_vma
= pc
;
137 demand(print_insn_little_mips(pc
, &info
) == sizeof(insn
), "disasm bug!");