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402 lines
10 KiB
C
402 lines
10 KiB
C
/* CRIS base simulator support code
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Copyright (C) 2004-2017 Free Software Foundation, Inc.
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Contributed by Axis Communications.
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This file is part of the GNU simulators.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* The infrastructure is based on that of i960.c. */
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#define WANT_CPU
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#include "sim-main.h"
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#include "cgen-mem.h"
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#include "cgen-ops.h"
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#define MY(f) XCONCAT3(crisv,BASENUM,f)
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/* Dispatcher for break insn. */
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USI
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MY (f_break_handler) (SIM_CPU *cpu, USI breaknum, USI pc)
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{
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SIM_DESC sd = CPU_STATE (cpu);
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USI ret = pc + 2;
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MY (f_h_pc_set) (cpu, ret);
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/* FIXME: Error out if IBR or ERP set. */
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switch (breaknum)
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{
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case 13:
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MY (f_h_gr_set (cpu, 10,
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cris_break_13_handler (cpu,
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MY (f_h_gr_get (cpu, 9)),
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MY (f_h_gr_get (cpu, 10)),
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MY (f_h_gr_get (cpu, 11)),
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MY (f_h_gr_get (cpu, 12)),
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MY (f_h_gr_get (cpu, 13)),
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MY (f_h_sr_get (cpu, 7)),
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MY (f_h_sr_get (cpu, 11)),
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pc)));
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break;
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case 14:
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sim_io_printf (sd, "%x\n", MY (f_h_gr_get (cpu, 3)));
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break;
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case 15:
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/* Re-use the Linux exit call. */
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cris_break_13_handler (cpu, /* TARGET_SYS_exit */ 1, 0,
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0, 0, 0, 0, 0, pc);
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default:
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abort ();
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}
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return MY (f_h_pc_get) (cpu);
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}
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/* Accessor function for simulator internal use.
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Note the contents of BUF are in target byte order. */
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int
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MY (f_fetch_register) (SIM_CPU *current_cpu, int rn,
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unsigned char *buf, int len ATTRIBUTE_UNUSED)
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{
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SETTSI (buf, XCONCAT3(crisv,BASENUM,f_h_gr_get) (current_cpu, rn));
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return -1;
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}
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/* Accessor function for simulator internal use.
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Note the contents of BUF are in target byte order. */
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int
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MY (f_store_register) (SIM_CPU *current_cpu, int rn,
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unsigned char *buf, int len ATTRIBUTE_UNUSED)
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{
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XCONCAT3(crisv,BASENUM,f_h_gr_set) (current_cpu, rn, GETTSI (buf));
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return -1;
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}
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#if WITH_PROFILE_MODEL_P
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/* FIXME: Some of these should be inline or macros. Later. */
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/* Initialize cycle counting for an insn.
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FIRST_P is non-zero if this is the first insn in a set of parallel
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insns. */
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void
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MY (f_model_insn_before) (SIM_CPU *current_cpu, int first_p ATTRIBUTE_UNUSED)
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{
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/* To give the impression that we actually know what PC is, we have to
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dump register contents *before* the *next* insn, not after the
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*previous* insn. Uhh... */
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/* FIXME: Move this to separate, overridable function. */
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if ((CPU_CRIS_MISC_PROFILE (current_cpu)->flags
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& FLAG_CRIS_MISC_PROFILE_XSIM_TRACE)
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#ifdef GET_H_INSN_PREFIXED_P
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/* For versions with prefixed insns, trace the combination as
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one insn. */
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&& !GET_H_INSN_PREFIXED_P ()
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#endif
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&& 1)
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{
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int i;
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char flags[7];
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unsigned64 cycle_count;
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SIM_DESC sd = CPU_STATE (current_cpu);
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cris_trace_printf (sd, current_cpu, "%lx ",
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0xffffffffUL & (unsigned long) (CPU (h_pc)));
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for (i = 0; i < 15; i++)
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cris_trace_printf (sd, current_cpu, "%lx ",
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0xffffffffUL
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& (unsigned long) (XCONCAT3(crisv,BASENUM,
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f_h_gr_get) (current_cpu,
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i)));
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flags[0] = GET_H_IBIT () != 0 ? 'I' : 'i';
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flags[1] = GET_H_XBIT () != 0 ? 'X' : 'x';
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flags[2] = GET_H_NBIT () != 0 ? 'N' : 'n';
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flags[3] = GET_H_ZBIT () != 0 ? 'Z' : 'z';
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flags[4] = GET_H_VBIT () != 0 ? 'V' : 'v';
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flags[5] = GET_H_CBIT () != 0 ? 'C' : 'c';
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flags[6] = 0;
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/* For anything else than basic tracing we'd add stall cycles for
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e.g. unaligned accesses. FIXME: add --cris-trace=x options to
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match --cris-cycles=x. */
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cycle_count
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= (CPU_CRIS_MISC_PROFILE (current_cpu)->basic_cycle_count
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- CPU_CRIS_PREV_MISC_PROFILE (current_cpu)->basic_cycle_count);
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/* Emit ACR after flags and cycle count for this insn. */
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if (BASENUM == 32)
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cris_trace_printf (sd, current_cpu, "%s %d %lx\n", flags,
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(int) cycle_count,
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0xffffffffUL
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& (unsigned long) (XCONCAT3(crisv,BASENUM,
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f_h_gr_get) (current_cpu,
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15)));
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else
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cris_trace_printf (sd, current_cpu, "%s %d\n", flags,
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(int) cycle_count);
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CPU_CRIS_PREV_MISC_PROFILE (current_cpu)[0]
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= CPU_CRIS_MISC_PROFILE (current_cpu)[0];
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}
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}
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/* Record the cycles computed for an insn.
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LAST_P is non-zero if this is the last insn in a set of parallel insns,
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and we update the total cycle count.
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CYCLES is the cycle count of the insn. */
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void
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MY (f_model_insn_after) (SIM_CPU *current_cpu, int last_p ATTRIBUTE_UNUSED,
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int cycles)
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{
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PROFILE_DATA *p = CPU_PROFILE_DATA (current_cpu);
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PROFILE_MODEL_TOTAL_CYCLES (p) += cycles;
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CPU_CRIS_MISC_PROFILE (current_cpu)->basic_cycle_count += cycles;
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PROFILE_MODEL_CUR_INSN_CYCLES (p) = cycles;
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#if WITH_HW
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/* For some reason, we don't get to the sim_events_tick call in
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cgen-run.c:engine_run_1. Besides, more than one cycle has
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passed, so we want sim_events_tickn anyway. The "events we want
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to process" is usually to initiate an interrupt, but might also
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be other events. We can't do the former until the main loop is
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at point where it accepts changing the PC without internal
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inconsistency, so just set a flag and wait. */
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if (sim_events_tickn (CPU_STATE (current_cpu), cycles))
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STATE_EVENTS (CPU_STATE (current_cpu))->work_pending = 1;
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#endif
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}
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/* Initialize cycle counting for an insn.
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FIRST_P is non-zero if this is the first insn in a set of parallel
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insns. */
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void
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MY (f_model_init_insn_cycles) (SIM_CPU *current_cpu ATTRIBUTE_UNUSED,
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int first_p ATTRIBUTE_UNUSED)
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{
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abort ();
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}
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/* Record the cycles computed for an insn.
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LAST_P is non-zero if this is the last insn in a set of parallel insns,
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and we update the total cycle count. */
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void
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MY (f_model_update_insn_cycles) (SIM_CPU *current_cpu ATTRIBUTE_UNUSED,
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int last_p ATTRIBUTE_UNUSED)
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{
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abort ();
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}
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#if 0
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void
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MY (f_model_record_cycles) (SIM_CPU *current_cpu, unsigned long cycles)
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{
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abort ();
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}
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void
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MY (f_model_mark_get_h_gr) (SIM_CPU *current_cpu, ARGBUF *abuf)
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{
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abort ();
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}
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void
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MY (f_model_mark_set_h_gr) (SIM_CPU *current_cpu, ARGBUF *abuf)
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{
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abort ();
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}
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#endif
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/* Set the thread register contents. */
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void
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MY (set_target_thread_data) (SIM_CPU *current_cpu, USI val)
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{
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(CPU (XCONCAT2 (h_sr_v, BASENUM) [CRIS_TLS_REGISTER])) = val;
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}
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/* Create the context for a thread. */
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void *
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MY (make_thread_cpu_data) (SIM_CPU *current_cpu, void *context)
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{
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void *info = xmalloc (current_cpu->thread_cpu_data_size);
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if (context != NULL)
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memcpy (info,
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context,
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current_cpu->thread_cpu_data_size);
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else
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memset (info, 0, current_cpu->thread_cpu_data_size),abort();
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return info;
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}
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/* Hook function for per-cpu simulator initialization. */
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void
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MY (f_specific_init) (SIM_CPU *current_cpu)
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{
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current_cpu->make_thread_cpu_data = MY (make_thread_cpu_data);
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current_cpu->thread_cpu_data_size = sizeof (current_cpu->cpu_data);
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current_cpu->set_target_thread_data = MY (set_target_thread_data);
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#if WITH_HW
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current_cpu->deliver_interrupt = MY (deliver_interrupt);
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#endif
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}
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/* Model function for arbitrary single stall cycles. */
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int
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MY (XCONCAT3 (f_model_crisv,BASENUM,
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_u_stall)) (SIM_CPU *current_cpu ATTRIBUTE_UNUSED,
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const IDESC *idesc,
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int unit_num,
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int referenced ATTRIBUTE_UNUSED)
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{
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return idesc->timing->units[unit_num].done;
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}
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#ifndef SPECIFIC_U_SKIP4_FN
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/* Model function for u-skip4 unit. */
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int
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MY (XCONCAT3 (f_model_crisv,BASENUM,
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_u_skip4)) (SIM_CPU *current_cpu,
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const IDESC *idesc,
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int unit_num,
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int referenced ATTRIBUTE_UNUSED)
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{
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/* Handle PC not being updated with pbb. FIXME: What if not pbb? */
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CPU (h_pc) += 4;
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return idesc->timing->units[unit_num].done;
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}
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#endif
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#ifndef SPECIFIC_U_EXEC_FN
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/* Model function for u-exec unit. */
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int
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MY (XCONCAT3 (f_model_crisv,BASENUM,
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_u_exec)) (SIM_CPU *current_cpu,
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const IDESC *idesc,
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int unit_num, int referenced ATTRIBUTE_UNUSED)
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{
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/* Handle PC not being updated with pbb. FIXME: What if not pbb? */
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CPU (h_pc) += 2;
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return idesc->timing->units[unit_num].done;
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}
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#endif
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#ifndef SPECIFIC_U_MEM_FN
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/* Model function for u-mem unit. */
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int
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MY (XCONCAT3 (f_model_crisv,BASENUM,
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_u_mem)) (SIM_CPU *current_cpu ATTRIBUTE_UNUSED,
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const IDESC *idesc,
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int unit_num,
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int referenced ATTRIBUTE_UNUSED)
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{
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return idesc->timing->units[unit_num].done;
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}
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#endif
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#ifndef SPECIFIC_U_CONST16_FN
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/* Model function for u-const16 unit. */
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int
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MY (XCONCAT3 (f_model_crisv,BASENUM,
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_u_const16)) (SIM_CPU *current_cpu,
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const IDESC *idesc,
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int unit_num,
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int referenced ATTRIBUTE_UNUSED)
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{
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CPU (h_pc) += 2;
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return idesc->timing->units[unit_num].done;
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}
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#endif /* SPECIFIC_U_CONST16_FN */
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#ifndef SPECIFIC_U_CONST32_FN
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/* This will be incorrect for early models, where a dword always take
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two cycles. */
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#define CRIS_MODEL_MASK_PC_STALL 2
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/* Model function for u-const32 unit. */
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int
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MY (XCONCAT3 (f_model_crisv,BASENUM,
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_u_const32)) (SIM_CPU *current_cpu,
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const IDESC *idesc,
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int unit_num,
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int referenced ATTRIBUTE_UNUSED)
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{
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int unaligned_extra
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= (((CPU (h_pc) + 2) & CRIS_MODEL_MASK_PC_STALL)
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== CRIS_MODEL_MASK_PC_STALL);
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/* Handle PC not being updated with pbb. FIXME: What if not pbb? */
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CPU_CRIS_MISC_PROFILE (current_cpu)->unaligned_mem_dword_count
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+= unaligned_extra;
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CPU (h_pc) += 4;
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return idesc->timing->units[unit_num].done;
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}
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#endif /* SPECIFIC_U_CONST32_FN */
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#ifndef SPECIFIC_U_MOVEM_FN
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/* Model function for u-movem unit. */
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int
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MY (XCONCAT3 (f_model_crisv,BASENUM,
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_u_movem)) (SIM_CPU *current_cpu ATTRIBUTE_UNUSED,
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const IDESC *idesc ATTRIBUTE_UNUSED,
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int unit_num ATTRIBUTE_UNUSED,
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int referenced ATTRIBUTE_UNUSED,
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INT limreg)
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{
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/* FIXME: Add cycles for misalignment. */
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if (limreg == -1)
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abort ();
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/* We don't record movem move cycles in movemsrc_stall_count since
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those cycles have historically been handled as ordinary cycles. */
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return limreg + 1;
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}
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#endif /* SPECIFIC_U_MOVEM_FN */
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#endif /* WITH_PROFILE_MODEL_P */
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