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jeremybenn |
/* CRIS v10 simulator support code
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Copyright (C) 2004, 2005, 2006, 2007, 2008 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_CRISV10F
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#define BASENUM 10
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#include "cris-tmpl.c"
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#if WITH_PROFILE_MODEL_P
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/* Model function for u-multiply unit. */
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int
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MY (XCONCAT3 (f_model_crisv,BASENUM,
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_u_multiply)) (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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{
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return 1;
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}
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#endif /* WITH_PROFILE_MODEL_P */
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/* Do the interrupt sequence if possible, and return 1. If interrupts
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are disabled or some other lockout is active, return 0 and do
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nothing.
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Beware, the v10 implementation is incomplete and doesn't properly
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lock out interrupts e.g. after special-register access and doesn't
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handle user-mode. */
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int
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MY (deliver_interrupt) (SIM_CPU *current_cpu,
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enum cris_interrupt_type type,
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unsigned int vec)
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{
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unsigned char entryaddr_le[4];
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int was_user;
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SIM_DESC sd = CPU_STATE (current_cpu);
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unsigned32 entryaddr;
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/* We haven't implemented other interrupt-types yet. */
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if (type != CRIS_INT_INT)
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abort ();
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/* We're supposed to be called outside of prefixes and branch
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delay-slots etc, but why not check. */
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if (GET_H_INSN_PREFIXED_P ())
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abort ();
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if (!GET_H_IBIT ())
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return 0;
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/* User mode isn't supported for interrupts. (And we shouldn't see
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this as 1 anyway. The user-mode bit isn't visible from user
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mode. It doesn't make it into the U bit until the next
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interrupt/exception.) */
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if (GET_H_UBIT ())
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abort ();
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SET_H_PBIT (1);
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if (sim_core_read_buffer (sd,
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current_cpu,
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read_map, entryaddr_le,
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GET_H_SR (H_SR_PRE_V32_IBR) + vec * 4, 4) == 0)
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{
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/* Nothing to do actually; either abort or send a signal. */
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sim_core_signal (sd, current_cpu, CIA_GET (current_cpu), 0, 4,
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GET_H_SR (H_SR_PRE_V32_IBR) + vec * 4,
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read_transfer, sim_core_unmapped_signal);
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return 0;
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}
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entryaddr = bfd_getl32 (entryaddr_le);
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SET_H_SR (H_SR_PRE_V32_IRP, GET_H_PC ());
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SET_H_PC (entryaddr);
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return 1;
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}
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