1# Simulator main loop for CRIS. -*- C -*- 2# Copyright (C) 2004-2024 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#line $LINENO "$0" 46#include <stdlib.h> 47 48/* It seems we don't have a templated header file corresponding to 49 cris-tmpl.c, so we have to get out declarations the hackish way. */ 50extern void @cpu@_specific_init (SIM_CPU *current_cpu); 51 52static INLINE const IDESC * 53extract (SIM_CPU *current_cpu, PCADDR pc, CGEN_INSN_INT insn, ARGBUF *abuf, 54 int fast_p) 55{ 56 const IDESC *id = @cpu@_decode (current_cpu, pc, insn, 57#if CGEN_INT_INSN_P 58 insn, 59#endif 60 abuf); 61 @cpu@_fill_argbuf (current_cpu, abuf, id, pc, fast_p); 62 if (! fast_p) 63 { 64 int trace_p = PC_IN_TRACE_RANGE_P (current_cpu, pc); 65 int profile_p = PC_IN_PROFILE_RANGE_P (current_cpu, pc); 66 @cpu@_fill_argbuf_tp (current_cpu, abuf, trace_p, profile_p); 67 } 68 return id; 69} 70 71/* This might not be used directly depending on the fast compile mode. */ 72ATTRIBUTE_UNUSED static INLINE SEM_PC 73execute (SIM_CPU *current_cpu, SCACHE *sc, int fast_p) 74{ 75 SEM_PC vpc; 76 77 if (fast_p) 78 { 79#if ! WITH_SEM_SWITCH_FAST 80#if WITH_SCACHE 81 vpc = (*sc->argbuf.semantic.sem_fast) (current_cpu, sc); 82#else 83 vpc = (*sc->argbuf.semantic.sem_fast) (current_cpu, &sc->argbuf); 84#endif 85#else 86 abort (); 87#endif /* WITH_SEM_SWITCH_FAST */ 88 } 89 else 90 { 91#if ! WITH_SEM_SWITCH_FULL 92 ARGBUF *abuf = &sc->argbuf; 93 const IDESC *idesc = abuf->idesc; 94#if WITH_SCACHE_PBB 95 int virtual_p = CGEN_ATTR_VALUE (NULL, idesc->attrs, CGEN_INSN_VIRTUAL); 96#else 97 int virtual_p = 0; 98#endif 99 100 if (! virtual_p) 101 { 102 /* FIXME: call x-before */ 103 if (ARGBUF_PROFILE_P (abuf)) 104 PROFILE_COUNT_INSN (current_cpu, abuf->addr, idesc->num); 105 /* FIXME: Later make cover macros: PROFILE_INSN_{INIT,FINI}. */ 106 if (PROFILE_MODEL_P (current_cpu) 107 && ARGBUF_PROFILE_P (abuf)) 108 @cpu@_model_insn_before (current_cpu, 1 /*first_p*/); 109 CGEN_TRACE_INSN_INIT (current_cpu, abuf, 1); 110 CGEN_TRACE_INSN (current_cpu, idesc->idata, 111 (const struct argbuf *) abuf, abuf->addr); 112 } 113#if WITH_SCACHE 114 vpc = (*sc->argbuf.semantic.sem_full) (current_cpu, sc); 115#else 116 vpc = (*sc->argbuf.semantic.sem_full) (current_cpu, abuf); 117#endif 118 if (! virtual_p) 119 { 120 /* FIXME: call x-after */ 121 if (PROFILE_MODEL_P (current_cpu) 122 && ARGBUF_PROFILE_P (abuf)) 123 { 124 int cycles; 125 126 cycles = (*idesc->timing->model_fn) (current_cpu, sc); 127 @cpu@_model_insn_after (current_cpu, 1 /*last_p*/, cycles); 128 } 129 CGEN_TRACE_INSN_FINI (current_cpu, abuf, 1); 130 } 131#else 132 abort (); 133#endif /* WITH_SEM_SWITCH_FULL */ 134 } 135 136 return vpc; 137} 138 139EOF 140 141;; 142 143xinit) 144 145cat <<EOF 146#line $LINENO "$0" 147 /* This seemed the only sane location to emit a call to a 148 model-specific init function. It may not work for all simulator 149 types. FIXME: Introduce a model-init hook. */ 150 151 /* We use the same condition as the code that's expected to follow, so 152 GCC can consolidate the code with only one conditional. */ 153 if (! CPU_IDESC_SEM_INIT_P (current_cpu)) 154 @cpu@_specific_init (current_cpu); 155EOF 156 157;; 158 159xextract-simple | xextract-scache) 160 161# Inputs: current_cpu, vpc, sc, FAST_P 162# Outputs: sc filled in 163 164cat <<EOF 165#line $LINENO "$0" 166{ 167 CGEN_INSN_INT insn = GETIMEMUHI (current_cpu, vpc); 168 extract (current_cpu, vpc, insn, SEM_ARGBUF (sc), FAST_P); 169} 170EOF 171 172;; 173 174xextract-pbb) 175 176# Inputs: current_cpu, pc, sc, max_insns, FAST_P 177# Outputs: sc, pc 178# sc must be left pointing past the last created entry. 179# pc must be left pointing past the last created entry. 180# If the pbb is terminated by a cti insn, SET_CTI_VPC(sc) must be called 181# to record the vpc of the cti insn. 182# SET_INSN_COUNT(n) must be called to record number of real insns. 183 184cat <<EOF 185#line $LINENO "$0" 186{ 187 const IDESC *idesc; 188 int icount = 0; 189 190 /* Make sure the buffer doesn't overflow for profiled insns if 191 max_insns happens to not be a multiple of 3. */ 192 if (!FAST_P) 193 max_insns -= 2 + 3; 194 else 195 /* There might be two real insns handled per loop. */ 196 max_insns--; 197 198 while (max_insns > 0) 199 { 200 UHI insn = GETIMEMUHI (current_cpu, pc); 201 int trace_p = PC_IN_TRACE_RANGE_P (current_cpu, pc); 202 int profile_p = PC_IN_PROFILE_RANGE_P (current_cpu, pc); 203 int befaft_p = profile_p || trace_p; 204 205 if (befaft_p) 206 { 207 @cpu@_emit_before (current_cpu, sc, pc, 1); 208 ++sc; 209 sc->argbuf.trace_p = trace_p; 210 sc->argbuf.profile_p = profile_p; 211 --max_insns; 212 } 213 214 idesc = extract (current_cpu, pc, insn, &sc->argbuf, FAST_P); 215 ++sc; 216 --max_insns; 217 ++icount; 218 219 if (befaft_p) 220 { 221 @cpu@_emit_after (current_cpu, sc, pc); 222 ++sc; 223 --max_insns; 224 } 225 226 pc += idesc->length; 227 228 if (IDESC_CTI_P (idesc)) 229 { 230 SET_CTI_VPC (sc - 1); 231 232 /* Delay slot? Ignore for zero-instructions (bcc .+2) since 233 those are treated as exit insns to avoid runaway sessions 234 for invalid programs. */ 235 if (insn != 0 && CGEN_ATTR_VALUE (NULL, idesc->attrs, CGEN_INSN_DELAY_SLOT)) 236 { 237 trace_p = PC_IN_TRACE_RANGE_P (current_cpu, pc); 238 profile_p = PC_IN_PROFILE_RANGE_P (current_cpu, pc); 239 befaft_p = profile_p || trace_p; 240 241 if (befaft_p) 242 { 243 @cpu@_emit_before (current_cpu, sc, pc, 1); 244 ++sc; 245 sc->argbuf.trace_p = trace_p; 246 sc->argbuf.profile_p = profile_p; 247 --max_insns; 248 } 249 250 insn = GETIMEMUHI (current_cpu, pc); 251 idesc = extract (current_cpu, pc, insn, &sc->argbuf, FAST_P); 252 ++sc; 253 --max_insns; 254 ++icount; 255 256 if (befaft_p) 257 { 258 @cpu@_emit_after (current_cpu, sc, pc); 259 ++sc; 260 --max_insns; 261 } 262 pc += idesc->length; 263 } 264 break; 265 } 266 } 267 268 Finish: 269 SET_INSN_COUNT (icount); 270} 271EOF 272 273;; 274 275xfull-exec-* | xfast-exec-*) 276 277# Inputs: current_cpu, sc, FAST_P 278# Outputs: vpc 279# vpc contains the address of the next insn to execute 280 281cat <<EOF 282#line $LINENO "$0" 283{ 284#if (! FAST_P && WITH_SEM_SWITCH_FULL) || (FAST_P && WITH_SEM_SWITCH_FAST) 285#define DEFINE_SWITCH 286#include "sem@cpu@-switch.c" 287#else 288 vpc = execute (current_cpu, vpc, FAST_P); 289#endif 290} 291EOF 292 293;; 294 295*) 296 echo "Invalid argument to mainloop.in: $1" >&2 297 exit 1 298 ;; 299 300esac 301