1 /* Copyright (C) 1995-2024 Free Software Foundation, Inc. 2 3 This program is free software; you can redistribute it and/or modify 4 it under the terms of the GNU General Public License as published by 5 the Free Software Foundation; either version 3 of the License, or 6 (at your option) any later version. 7 8 This program is distributed in the hope that it will be useful, 9 but WITHOUT ANY WARRANTY; without even the implied warranty of 10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 GNU General Public License for more details. 12 13 You should have received a copy of the GNU General Public License 14 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 15 16 #include "ansidecl.h" 17 #include "sim/callback.h" 18 #include "sim/sim.h" 19 #include <sim-config.h> 20 #include <stdint.h> 21 #include "dis-asm.h" 22 23 #if HOST_BYTE_ORDER == BIG_ENDIAN 24 #define HOST_BIG_ENDIAN 25 #define EBT 0 26 #else 27 #define HOST_LITTLE_ENDIAN 28 #define EBT 3 29 #endif 30 31 #define I_ACC_EXC 1 32 33 /* Maximum events in event queue */ 34 #define MAX_EVENTS 256 35 36 /* Maximum # of floating point queue */ 37 #define FPUQN 1 38 39 /* Maximum # of breakpoints */ 40 #define BPT_MAX 256 41 42 struct histype { 43 unsigned addr; 44 unsigned time; 45 }; 46 47 /* type definitions */ 48 49 typedef float float32; /* 32-bit float */ 50 typedef double float64; /* 64-bit float */ 51 52 struct pstate { 53 54 float64 fd[16]; /* FPU registers */ 55 #ifdef HOST_LITTLE_ENDIAN 56 float32 fs[32]; 57 float32 *fdp; 58 #else 59 float32 *fs; 60 #endif 61 int32_t *fsi; 62 uint32_t fsr; 63 int32_t fpstate; 64 uint32_t fpq[FPUQN * 2]; 65 uint32_t fpqn; 66 uint32_t ftime; 67 uint32_t flrd; 68 uint32_t frd; 69 uint32_t frs1; 70 uint32_t frs2; 71 uint32_t fpu_pres; /* FPU present (0 = No, 1 = Yes) */ 72 73 uint32_t psr; /* IU registers */ 74 uint32_t tbr; 75 uint32_t wim; 76 uint32_t g[8]; 77 uint32_t r[128]; 78 uint32_t y; 79 uint32_t asr17; /* Single vector trapping */ 80 uint32_t pc, npc; 81 82 83 uint32_t trap; /* Current trap type */ 84 uint32_t annul; /* Instruction annul */ 85 uint32_t data; /* Loaded data */ 86 uint32_t inst; /* Current instruction */ 87 uint32_t asi; /* Current ASI */ 88 uint32_t err_mode; /* IU error mode */ 89 uint32_t breakpoint; 90 uint32_t bptnum; 91 uint32_t bphit; 92 uint32_t bpts[BPT_MAX]; /* Breakpoints */ 93 94 uint32_t ltime; /* Load interlock time */ 95 uint32_t hold; /* IU hold cycles in current inst */ 96 uint32_t fhold; /* FPU hold cycles in current inst */ 97 uint32_t icnt; /* Instruction cycles in curr inst */ 98 99 uint32_t histlen; /* Trace history management */ 100 uint32_t histind; 101 struct histype *histbuf; 102 float32 freq; /* Simulated processor frequency */ 103 104 105 double tottime; 106 uint64_t ninst; 107 uint64_t fholdt; 108 uint64_t holdt; 109 uint64_t icntt; 110 uint64_t finst; 111 uint64_t simstart; 112 double starttime; 113 uint64_t tlimit; /* Simulation time limit */ 114 uint64_t pwdtime; /* Cycles in power-down mode */ 115 uint64_t nstore; /* Number of load instructions */ 116 uint64_t nload; /* Number of store instructions */ 117 uint64_t nannul; /* Number of annuled instructions */ 118 uint64_t nbranch; /* Number of branch instructions */ 119 uint32_t ildreg; /* Destination of last load instruction */ 120 uint64_t ildtime; /* Last time point for load dependency */ 121 122 int rett_err; /* IU in jmpl/restore error state (Rev.0) */ 123 int jmpltime; 124 }; 125 126 struct evcell { 127 void (*cfunc) (int32_t); 128 int32_t arg; 129 uint64_t time; 130 struct evcell *nxt; 131 }; 132 133 struct estate { 134 struct evcell eq; 135 struct evcell *freeq; 136 uint64_t simtime; 137 }; 138 139 struct irqcell { 140 void (*callback) (int32_t); 141 int32_t arg; 142 }; 143 144 145 #define OK 0 146 #define TIME_OUT 1 147 #define BPT_HIT 2 148 #define ERROR 3 149 #define CTRL_C 4 150 151 /* Prototypes */ 152 153 /* erc32.c */ 154 extern void init_sim (void); 155 extern void reset (void); 156 extern void error_mode (uint32_t pc); 157 extern void sim_halt (void); 158 extern void exit_sim (void); 159 extern void init_stdio (void); 160 extern void restore_stdio (void); 161 extern int memory_iread (uint32_t addr, uint32_t *data, uint32_t *ws); 162 extern int memory_read (int32_t asi, uint32_t addr, void *data, 163 int32_t sz, int32_t *ws); 164 extern int memory_write (int32_t asi, uint32_t addr, uint32_t *data, 165 int32_t sz, int32_t *ws); 166 extern int sis_memory_write (uint32_t addr, 167 const void *data, uint32_t length); 168 extern int sis_memory_read (uint32_t addr, void *data, 169 uint32_t length); 170 extern void boot_init (void); 171 172 /* func.c */ 173 extern struct pstate sregs; 174 extern void set_regi (struct pstate *sregs, int32_t reg, 175 uint32_t rval); 176 extern void get_regi (struct pstate *sregs, int32_t reg, unsigned char *buf); 177 extern int exec_cmd (struct pstate *sregs, const char *cmd); 178 extern void reset_stat (struct pstate *sregs); 179 extern void show_stat (struct pstate *sregs); 180 extern void init_bpt (struct pstate *sregs); 181 extern void init_signals (void); 182 183 struct disassemble_info; 184 extern void dis_mem (uint32_t addr, uint32_t len, 185 struct disassemble_info *info); 186 extern void event (void (*cfunc) (int32_t), int32_t arg, uint64_t delta); 187 extern void set_int (int32_t level, void (*callback) (int32_t), int32_t arg); 188 extern void advance_time (struct pstate *sregs); 189 extern uint32_t now (void); 190 extern int wait_for_irq (void); 191 extern int check_bpt (struct pstate *sregs); 192 extern void reset_all (void); 193 extern void sys_reset (void); 194 extern void sys_halt (void); 195 extern int bfd_load (const char *fname); 196 extern double get_time (void); 197 198 /* exec.c */ 199 extern int dispatch_instruction (struct pstate *sregs); 200 extern int execute_trap (struct pstate *sregs); 201 extern int check_interrupts (struct pstate *sregs); 202 extern void init_regs (struct pstate *sregs); 203 204 /* interf.c */ 205 extern int run_sim (struct pstate *sregs, 206 uint64_t icount, int dis); 207 208 /* float.c */ 209 extern int get_accex (void); 210 extern void clear_accex (void); 211 extern void set_fsr (uint32_t fsr); 212 213 /* help.c */ 214 extern void usage (void); 215 extern void gen_help (void); 216