1 /* cpu.h --- declarations for the M32C core.
3 Copyright (C) 2005, 2007, 2008 Free Software Foundation, Inc.
4 Contributed by Red Hat, Inc.
6 This file is part of the GNU simulators.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 extern int enable_counting;
26 typedef unsigned char QI;
27 typedef unsigned short HI;
28 typedef unsigned long SI;
29 typedef unsigned long long DI;
33 #define CPU_M32CM 0x23
36 void m32c_set_cpu (int cpu);
38 #define A16 (m32c_cpu & 0x10)
39 #define A24 (m32c_cpu & 0x20)
64 extern regs_type regs;
66 extern int membus_mask;
68 #define FLAGBIT_C 0x0001
69 #define FLAGBIT_D 0x0002
70 #define FLAGBIT_Z 0x0004
71 #define FLAGBIT_S 0x0008
72 #define FLAGBIT_B 0x0010
73 #define FLAGBIT_O 0x0020
74 #define FLAGBIT_I 0x0040
75 #define FLAGBIT_U 0x0080
77 #define REG_BANK (regs.r_flags & FLAG_B ? 1 : 0)
92 sp, usp, isp, pc, flags,
96 extern char *reg_names[];
97 extern int reg_bytes[];
99 extern unsigned int b2mask[];
100 extern unsigned int b2signbit[];
101 extern int b2maxsigned[];
102 extern int b2minsigned[];
104 void init_regs (void);
105 void stack_heap_stats (void);
106 void set_pointer_width (int bytes);
107 unsigned int get_reg (reg_id id);
108 DI get_reg_ll (reg_id id);
109 void put_reg (reg_id id, unsigned int value);
110 void put_reg_ll (reg_id id, DI value);
112 void set_flags (int mask, int newbits);
113 void set_oszc (int value, int bytes, int c);
114 void set_szc (int value, int bytes, int c);
115 void set_osz (int value, int bytes);
116 void set_sz (int value, int bytes);
117 void set_zc (int z, int c);
120 const char *bits (int v, int b);
134 void decode_indirect (int src_indirect, int dest_indirect);
135 void decode_index (int src_addend, int dest_addend);
138 srcdest decode_srcdest4 (int destcode, int bw);
139 srcdest decode_dest3 (int destcode, int bw);
140 srcdest decode_src2 (int srccode, int bw, int d);
141 srcdest decode_dest1 (int destcode, int bw);
142 srcdest decode_jumpdest (int destcode, int w);
143 srcdest decode_cr (int crcode);
144 srcdest decode_cr_b (int crcode, int bank);
150 srcdest decode_dest23 (int ddd, int dd, int bytes);
151 srcdest decode_src23 (int sss, int ss, int bytes);
152 srcdest decode_src3 (int sss, int bytes);
153 srcdest decode_dest2 (int dd, int bytes);
155 srcdest widen_sd (srcdest sd);
156 srcdest reg_sd (reg_id reg);
158 /* Mask has the one appropriate bit set. */
159 srcdest decode_bit (int destcode);
160 srcdest decode_bit11 (int op0);
161 int get_bit (srcdest sd);
162 void put_bit (srcdest sd, int val);
163 int get_bit2 (srcdest sd, int bit);
164 void put_bit2 (srcdest sd, int bit, int val);
166 int get_src (srcdest sd);
167 void put_dest (srcdest sd, int value);
169 int condition_true (int cond_id);
171 #define FLAG(f) (regs.r_flags & f ? 1 : 0)
172 #define FLAG_C FLAG(FLAGBIT_C)
173 #define FLAG_D FLAG(FLAGBIT_D)
174 #define FLAG_Z FLAG(FLAGBIT_Z)
175 #define FLAG_S FLAG(FLAGBIT_S)
176 #define FLAG_B FLAG(FLAGBIT_B)
177 #define FLAG_O FLAG(FLAGBIT_O)
178 #define FLAG_I FLAG(FLAGBIT_I)
179 #define FLAG_U FLAG(FLAGBIT_U)
181 /* Instruction step return codes.
182 Suppose one of the decode_* functions below returns a value R:
183 - If M32C_STEPPED (R), then the single-step completed normally.
184 - If M32C_HIT_BREAK (R), then the program hit a breakpoint.
185 - If M32C_EXITED (R), then the program has done an 'exit' system
186 call, and the exit code is M32C_EXIT_STATUS (R).
187 - If M32C_STOPPED (R), then a signal (number M32C_STOP_SIG (R)) was
190 For building step return codes:
191 - M32C_MAKE_STEPPED is the return code for finishing a normal step.
192 - M32C_MAKE_HIT_BREAK is the return code for hitting a breakpoint.
193 - M32C_MAKE_EXITED (C) is the return code for exiting with status C.
194 - M32C_MAKE_STOPPED (S) is the return code for stopping on signal S. */
195 #define M32C_MAKE_STEPPED() (0)
196 #define M32C_MAKE_HIT_BREAK() (1)
197 #define M32C_MAKE_EXITED(c) (((int) (c) << 8) + 2)
198 #define M32C_MAKE_STOPPED(s) (((int) (s) << 8) + 3)
200 #define M32C_STEPPED(r) ((r) == M32C_MAKE_STEPPED ())
201 #define M32C_HIT_BREAK(r) ((r) == M32C_MAKE_HIT_BREAK ())
202 #define M32C_EXITED(r) (((r) & 0xff) == 2)
203 #define M32C_EXIT_STATUS(r) ((r) >> 8)
204 #define M32C_STOPPED(r) (((r) & 0xff) == 3)
205 #define M32C_STOP_SIG(r) ((r) >> 8)
207 /* The step result for the current step. Global to allow
208 communication between the stepping function and the system
210 extern int step_result;
212 /* Used to detect heap/stack collisions */
213 extern unsigned int heaptop;
214 extern unsigned int heapbottom;
216 /* Points to one of the below functions, set by m32c_load(). */
217 extern int (*decode_opcode) ();
219 extern int decode_r8c ();
220 extern int decode_m32c ();
222 extern void trace_register_changes ();