1 /* m32r exception, interrupt, and trap (EIT) support
2 Copyright (C) 1998, 2003, 2007, 2008, 2009 Free Software Foundation, Inc.
3 Contributed by Cygnus Solutions.
5 This file is part of GDB, the GNU debugger.
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.
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.
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/>. */
21 #include "targ-vals.h"
23 #define TRAP_FLUSH_CACHE 12
24 /* The semantic code invokes this for invalid (unrecognized) instructions. */
27 sim_engine_invalid_insn (SIM_CPU *current_cpu, IADDR cia, SEM_PC pc)
29 SIM_DESC sd = CPU_STATE (current_cpu);
32 if (STATE_ENVIRONMENT (sd) == OPERATING_ENVIRONMENT)
34 h_bsm_set (current_cpu, h_sm_get (current_cpu));
35 h_bie_set (current_cpu, h_ie_get (current_cpu));
36 h_bcond_set (current_cpu, h_cond_get (current_cpu));
38 h_ie_set (current_cpu, 0);
39 h_cond_set (current_cpu, 0);
41 h_bpc_set (current_cpu, cia);
43 sim_engine_restart (CPU_STATE (current_cpu), current_cpu, NULL,
48 sim_engine_halt (sd, current_cpu, NULL, cia, sim_stopped, SIM_SIGILL);
53 /* Process an address exception. */
56 m32r_core_signal (SIM_DESC sd, SIM_CPU *current_cpu, sim_cia cia,
57 unsigned int map, int nr_bytes, address_word addr,
58 transfer_type transfer, sim_core_signals sig)
60 if (STATE_ENVIRONMENT (sd) == OPERATING_ENVIRONMENT)
62 m32rbf_h_cr_set (current_cpu, H_CR_BBPC,
63 m32rbf_h_cr_get (current_cpu, H_CR_BPC));
64 switch (MACH_NUM (CPU_MACH (current_cpu)))
67 m32rbf_h_bpsw_set (current_cpu, m32rbf_h_psw_get (current_cpu));
69 m32rbf_h_psw_set (current_cpu, m32rbf_h_psw_get (current_cpu) & 0x80);
72 m32rxf_h_bpsw_set (current_cpu, m32rxf_h_psw_get (current_cpu));
74 m32rxf_h_psw_set (current_cpu, m32rxf_h_psw_get (current_cpu) & 0x80);
77 m32r2f_h_bpsw_set (current_cpu, m32r2f_h_psw_get (current_cpu));
79 m32r2f_h_psw_set (current_cpu, m32r2f_h_psw_get (current_cpu) & 0x80);
85 m32rbf_h_cr_set (current_cpu, H_CR_BPC, cia);
87 sim_engine_restart (CPU_STATE (current_cpu), current_cpu, NULL,
91 sim_core_signal (sd, current_cpu, cia, map, nr_bytes, addr,
95 /* Read/write functions for system call interface. */
98 syscall_read_mem (host_callback *cb, struct cb_syscall *sc,
99 unsigned long taddr, char *buf, int bytes)
101 SIM_DESC sd = (SIM_DESC) sc->p1;
102 SIM_CPU *cpu = (SIM_CPU *) sc->p2;
104 return sim_core_read_buffer (sd, cpu, read_map, buf, taddr, bytes);
108 syscall_write_mem (host_callback *cb, struct cb_syscall *sc,
109 unsigned long taddr, const char *buf, int bytes)
111 SIM_DESC sd = (SIM_DESC) sc->p1;
112 SIM_CPU *cpu = (SIM_CPU *) sc->p2;
114 return sim_core_write_buffer (sd, cpu, write_map, buf, taddr, bytes);
118 The result is the pc address to continue at.
119 Preprocessing like saving the various registers has already been done. */
122 m32r_trap (SIM_CPU *current_cpu, PCADDR pc, int num)
124 SIM_DESC sd = CPU_STATE (current_cpu);
125 host_callback *cb = STATE_CALLBACK (sd);
127 #ifdef SIM_HAVE_BREAKPOINTS
128 /* Check for breakpoints "owned" by the simulator first, regardless
130 if (num == TRAP_BREAKPOINT)
132 /* First try sim-break.c. If it's a breakpoint the simulator "owns"
133 it doesn't return. Otherwise it returns and let's us try. */
134 sim_handle_breakpoint (sd, current_cpu, pc);
139 if (STATE_ENVIRONMENT (sd) == OPERATING_ENVIRONMENT)
141 /* The new pc is the trap vector entry.
142 We assume there's a branch there to some handler.
143 Use cr5 as EVB (EIT Vector Base) register. */
144 /* USI new_pc = EIT_TRAP_BASE_ADDR + num * 4; */
145 USI new_pc = m32rbf_h_cr_get (current_cpu, 5) + 0x40 + num * 4;
155 CB_SYSCALL_INIT (&s);
156 s.func = m32rbf_h_gr_get (current_cpu, 0);
157 s.arg1 = m32rbf_h_gr_get (current_cpu, 1);
158 s.arg2 = m32rbf_h_gr_get (current_cpu, 2);
159 s.arg3 = m32rbf_h_gr_get (current_cpu, 3);
161 if (s.func == TARGET_SYS_exit)
163 sim_engine_halt (sd, current_cpu, NULL, pc, sim_exited, s.arg1);
167 s.p2 = (PTR) current_cpu;
168 s.read_mem = syscall_read_mem;
169 s.write_mem = syscall_write_mem;
171 m32rbf_h_gr_set (current_cpu, 2, s.errcode);
172 m32rbf_h_gr_set (current_cpu, 0, s.result);
173 m32rbf_h_gr_set (current_cpu, 1, s.result2);
177 case TRAP_BREAKPOINT:
178 sim_engine_halt (sd, current_cpu, NULL, pc,
179 sim_stopped, SIM_SIGTRAP);
182 case TRAP_FLUSH_CACHE:
188 /* USI new_pc = EIT_TRAP_BASE_ADDR + num * 4; */
189 /* Use cr5 as EVB (EIT Vector Base) register. */
190 USI new_pc = m32rbf_h_cr_get (current_cpu, 5) + 0x40 + num * 4;
195 /* Fake an "rte" insn. */
196 /* FIXME: Should duplicate all of rte processing. */
197 return (pc & -4) + 4;