1# Simulator main loop for CRIS. -*- C -*- 2# Copyright (C) 2004-2020 Free Software Foundation, Inc. 3# Contributed by Axis Communications. 4# 5# This file is part of the GNU simulators. 6# 7# This program is free software; you can redistribute it and/or modify 8# it under the terms of the GNU General Public License as published by 9# the Free Software Foundation; either version 3 of the License, or 10# (at your option) any later version. 11# 12# This program is distributed in the hope that it will be useful, 13# but WITHOUT ANY WARRANTY; without even the implied warranty of 14# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15# GNU General Public License for more details. 16# 17# You should have received a copy of the GNU General Public License 18# along with this program. If not, see <http://www.gnu.org/licenses/>. 19 20# Based on the fr30 file. 21 22# Syntax: 23# /bin/sh mainloop.in command 24# 25# Command is one of: 26# 27# init 28# support 29# extract-{simple,scache,pbb} 30# {full,fast}-exec-{simple,scache,pbb} 31# 32# A target need only provide a "full" version of one of simple,scache,pbb. 33# If the target wants it can also provide a fast version of same. 34# It can't provide more than this, however for illustration's sake the CRIS 35# port provides examples of all. 36 37# ??? After a few more ports are done, revisit. 38# Will eventually need to machine generate a lot of this. 39 40case "x$1" in 41 42xsupport) 43 44cat <<EOF 45/* It seems we don't have a templated header file corresponding to 46 cris-tmpl.c, so we have to get out declarations the hackish way. */ 47extern void @cpu@_specific_init (SIM_CPU *current_cpu); 48 49static INLINE const IDESC * 50extract (SIM_CPU *current_cpu, PCADDR pc, CGEN_INSN_INT insn, ARGBUF *abuf, 51 int fast_p) 52{ 53 const IDESC *id = @cpu@_decode (current_cpu, pc, insn, 54#if CGEN_INT_INSN_P 55 insn, 56#endif 57 abuf); 58 @cpu@_fill_argbuf (current_cpu, abuf, id, pc, fast_p); 59 if (! fast_p) 60 { 61 int trace_p = PC_IN_TRACE_RANGE_P (current_cpu, pc); 62 int profile_p = PC_IN_PROFILE_RANGE_P (current_cpu, pc); 63 @cpu@_fill_argbuf_tp (current_cpu, abuf, trace_p, profile_p); 64 } 65 return id; 66} 67 68static INLINE SEM_PC 69execute (SIM_CPU *current_cpu, SCACHE *sc, int fast_p) 70{ 71 SEM_PC vpc; 72 73 if (fast_p) 74 { 75#if ! WITH_SEM_SWITCH_FAST 76#if WITH_SCACHE 77 vpc = (*sc->argbuf.semantic.sem_fast) (current_cpu, sc); 78#else 79 vpc = (*sc->argbuf.semantic.sem_fast) (current_cpu, &sc->argbuf); 80#endif 81#else 82 abort (); 83#endif /* WITH_SEM_SWITCH_FAST */ 84 } 85 else 86 { 87#if ! WITH_SEM_SWITCH_FULL 88 ARGBUF *abuf = &sc->argbuf; 89 const IDESC *idesc = abuf->idesc; 90#if WITH_SCACHE_PBB 91 int virtual_p = CGEN_ATTR_VALUE (NULL, idesc->attrs, CGEN_INSN_VIRTUAL); 92#else 93 int virtual_p = 0; 94#endif 95 96 if (! virtual_p) 97 { 98 /* FIXME: call x-before */ 99 if (ARGBUF_PROFILE_P (abuf)) 100 PROFILE_COUNT_INSN (current_cpu, abuf->addr, idesc->num); 101 /* FIXME: Later make cover macros: PROFILE_INSN_{INIT,FINI}. */ 102 if (PROFILE_MODEL_P (current_cpu) 103 && ARGBUF_PROFILE_P (abuf)) 104 @cpu@_model_insn_before (current_cpu, 1 /*first_p*/); 105 CGEN_TRACE_INSN_INIT (current_cpu, abuf, 1); 106 CGEN_TRACE_INSN (current_cpu, idesc->idata, 107 (const struct argbuf *) abuf, abuf->addr); 108 } 109#if WITH_SCACHE 110 vpc = (*sc->argbuf.semantic.sem_full) (current_cpu, sc); 111#else 112 vpc = (*sc->argbuf.semantic.sem_full) (current_cpu, abuf); 113#endif 114 if (! virtual_p) 115 { 116 /* FIXME: call x-after */ 117 if (PROFILE_MODEL_P (current_cpu) 118 && ARGBUF_PROFILE_P (abuf)) 119 { 120 int cycles; 121 122 cycles = (*idesc->timing->model_fn) (current_cpu, sc); 123 @cpu@_model_insn_after (current_cpu, 1 /*last_p*/, cycles); 124 } 125 CGEN_TRACE_INSN_FINI (current_cpu, abuf, 1); 126 } 127#else 128 abort (); 129#endif /* WITH_SEM_SWITCH_FULL */ 130 } 131 132 return vpc; 133} 134 135EOF 136 137;; 138 139xinit) 140 141cat <<EOF 142 /* This seemed the only sane location to emit a call to a 143 model-specific init function. It may not work for all simulator 144 types. FIXME: Introduce a model-init hook. */ 145 146 /* We use the same condition as the code that's expected to follow, so 147 GCC can consolidate the code with only one conditional. */ 148 if (! CPU_IDESC_SEM_INIT_P (current_cpu)) 149 @cpu@_specific_init (current_cpu); 150EOF 151 152;; 153 154xextract-simple | xextract-scache) 155 156# Inputs: current_cpu, vpc, sc, FAST_P 157# Outputs: sc filled in 158 159cat <<EOF 160{ 161 CGEN_INSN_INT insn = GETIMEMUHI (current_cpu, vpc); 162 extract (current_cpu, vpc, insn, SEM_ARGBUF (sc), FAST_P); 163} 164EOF 165 166;; 167 168xextract-pbb) 169 170# Inputs: current_cpu, pc, sc, max_insns, FAST_P 171# Outputs: sc, pc 172# sc must be left pointing past the last created entry. 173# pc must be left pointing past the last created entry. 174# If the pbb is terminated by a cti insn, SET_CTI_VPC(sc) must be called 175# to record the vpc of the cti insn. 176# SET_INSN_COUNT(n) must be called to record number of real insns. 177 178cat <<EOF 179{ 180 const IDESC *idesc; 181 int icount = 0; 182 183 /* Make sure the buffer doesn't overflow for profiled insns if 184 max_insns happens to not be a multiple of 3. */ 185 if (!FAST_P) 186 max_insns -= 2 + 3; 187 else 188 /* There might be two real insns handled per loop. */ 189 max_insns--; 190 191 while (max_insns > 0) 192 { 193 UHI insn = GETIMEMUHI (current_cpu, pc); 194 int trace_p = PC_IN_TRACE_RANGE_P (current_cpu, pc); 195 int profile_p = PC_IN_PROFILE_RANGE_P (current_cpu, pc); 196 int befaft_p = profile_p || trace_p; 197 198 if (befaft_p) 199 { 200 @cpu@_emit_before (current_cpu, sc, pc, 1); 201 ++sc; 202 sc->argbuf.trace_p = trace_p; 203 sc->argbuf.profile_p = profile_p; 204 --max_insns; 205 } 206 207 idesc = extract (current_cpu, pc, insn, &sc->argbuf, FAST_P); 208 ++sc; 209 --max_insns; 210 ++icount; 211 212 if (befaft_p) 213 { 214 @cpu@_emit_after (current_cpu, sc, pc); 215 ++sc; 216 --max_insns; 217 } 218 219 pc += idesc->length; 220 221 if (IDESC_CTI_P (idesc)) 222 { 223 SET_CTI_VPC (sc - 1); 224 225 /* Delay slot? Ignore for zero-instructions (bcc .+2) since 226 those are treated as exit insns to avoid runaway sessions 227 for invalid programs. */ 228 if (insn != 0 && CGEN_ATTR_VALUE (NULL, idesc->attrs, CGEN_INSN_DELAY_SLOT)) 229 { 230 UHI insn; 231 trace_p = PC_IN_TRACE_RANGE_P (current_cpu, pc); 232 profile_p = PC_IN_PROFILE_RANGE_P (current_cpu, pc); 233 befaft_p = profile_p || trace_p; 234 235 if (befaft_p) 236 { 237 @cpu@_emit_before (current_cpu, sc, pc, 1); 238 ++sc; 239 sc->argbuf.trace_p = trace_p; 240 sc->argbuf.profile_p = profile_p; 241 --max_insns; 242 } 243 244 insn = GETIMEMUHI (current_cpu, pc); 245 idesc = extract (current_cpu, pc, insn, &sc->argbuf, FAST_P); 246 ++sc; 247 --max_insns; 248 ++icount; 249 250 if (befaft_p) 251 { 252 @cpu@_emit_after (current_cpu, sc, pc); 253 ++sc; 254 --max_insns; 255 } 256 pc += idesc->length; 257 } 258 break; 259 } 260 } 261 262 Finish: 263 SET_INSN_COUNT (icount); 264} 265EOF 266 267;; 268 269xfull-exec-* | xfast-exec-*) 270 271# Inputs: current_cpu, sc, FAST_P 272# Outputs: vpc 273# vpc contains the address of the next insn to execute 274 275cat <<EOF 276{ 277#if (! FAST_P && WITH_SEM_SWITCH_FULL) || (FAST_P && WITH_SEM_SWITCH_FAST) 278#define DEFINE_SWITCH 279#include "sem@cpu@-switch.c" 280#else 281 vpc = execute (current_cpu, vpc, FAST_P); 282#endif 283} 284EOF 285 286;; 287 288*) 289 echo "Invalid argument to mainloop.in: $1" >&2 290 exit 1 291 ;; 292 293esac 294