1 /* cpu.h --- declarations for the M32C core.
3 Copyright (C) 2005-2016 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;
28 typedef unsigned char QI;
29 typedef unsigned short HI;
30 typedef unsigned long SI;
31 typedef unsigned long long DI;
35 #define CPU_M32CM 0x23
38 void m32c_set_cpu (int cpu);
40 #define A16 (m32c_cpu & 0x10)
41 #define A24 (m32c_cpu & 0x20)
66 extern regs_type regs;
68 extern int membus_mask;
70 #define FLAGBIT_C 0x0001
71 #define FLAGBIT_D 0x0002
72 #define FLAGBIT_Z 0x0004
73 #define FLAGBIT_S 0x0008
74 #define FLAGBIT_B 0x0010
75 #define FLAGBIT_O 0x0020
76 #define FLAGBIT_I 0x0040
77 #define FLAGBIT_U 0x0080
79 #define REG_BANK (regs.r_flags & FLAG_B ? 1 : 0)
94 sp, usp, isp, pc, flags,
98 extern char *reg_names[];
99 extern int reg_bytes[];
101 extern unsigned int b2mask[];
102 extern unsigned int b2signbit[];
103 extern int b2maxsigned[];
104 extern int b2minsigned[];
106 /* address of the opcode that just decoded, and thus caused the
108 extern int m32c_opcode_pc;
110 void init_regs (void);
111 void stack_heap_stats (void);
112 void set_pointer_width (int bytes);
113 unsigned int get_reg (reg_id id);
114 DI get_reg_ll (reg_id id);
115 void put_reg (reg_id id, unsigned int value);
116 void put_reg_ll (reg_id id, DI value);
118 void set_flags (int mask, int newbits);
119 void set_oszc (int value, int bytes, int c);
120 void set_szc (int value, int bytes, int c);
121 void set_osz (int value, int bytes);
122 void set_sz (int value, int bytes);
123 void set_zc (int z, int c);
126 const char *bits (int v, int b);
140 void decode_indirect (int src_indirect, int dest_indirect);
141 void decode_index (int src_addend, int dest_addend);
144 srcdest decode_srcdest4 (int destcode, int bw);
145 srcdest decode_dest3 (int destcode, int bw);
146 srcdest decode_src2 (int srccode, int bw, int d);
147 srcdest decode_dest1 (int destcode, int bw);
148 srcdest decode_jumpdest (int destcode, int w);
149 srcdest decode_cr (int crcode);
150 srcdest decode_cr_b (int crcode, int bank);
156 srcdest decode_dest23 (int ddd, int dd, int bytes);
157 srcdest decode_src23 (int sss, int ss, int bytes);
158 srcdest decode_src3 (int sss, int bytes);
159 srcdest decode_dest2 (int dd, int bytes);
161 srcdest widen_sd (srcdest sd);
162 srcdest reg_sd (reg_id reg);
164 /* Mask has the one appropriate bit set. */
165 srcdest decode_bit (int destcode);
166 srcdest decode_bit11 (int op0);
167 int get_bit (srcdest sd);
168 void put_bit (srcdest sd, int val);
169 int get_bit2 (srcdest sd, int bit);
170 void put_bit2 (srcdest sd, int bit, int val);
172 int get_src (srcdest sd);
173 void put_dest (srcdest sd, int value);
175 int condition_true (int cond_id);
177 #define FLAG(f) (regs.r_flags & f ? 1 : 0)
178 #define FLAG_C FLAG(FLAGBIT_C)
179 #define FLAG_D FLAG(FLAGBIT_D)
180 #define FLAG_Z FLAG(FLAGBIT_Z)
181 #define FLAG_S FLAG(FLAGBIT_S)
182 #define FLAG_B FLAG(FLAGBIT_B)
183 #define FLAG_O FLAG(FLAGBIT_O)
184 #define FLAG_I FLAG(FLAGBIT_I)
185 #define FLAG_U FLAG(FLAGBIT_U)
187 /* Instruction step return codes.
188 Suppose one of the decode_* functions below returns a value R:
189 - If M32C_STEPPED (R), then the single-step completed normally.
190 - If M32C_HIT_BREAK (R), then the program hit a breakpoint.
191 - If M32C_EXITED (R), then the program has done an 'exit' system
192 call, and the exit code is M32C_EXIT_STATUS (R).
193 - If M32C_STOPPED (R), then a signal (number M32C_STOP_SIG (R)) was
196 For building step return codes:
197 - M32C_MAKE_STEPPED is the return code for finishing a normal step.
198 - M32C_MAKE_HIT_BREAK is the return code for hitting a breakpoint.
199 - M32C_MAKE_EXITED (C) is the return code for exiting with status C.
200 - M32C_MAKE_STOPPED (S) is the return code for stopping on signal S. */
201 #define M32C_MAKE_STEPPED() (0)
202 #define M32C_MAKE_HIT_BREAK() (1)
203 #define M32C_MAKE_EXITED(c) (((int) (c) << 8) + 2)
204 #define M32C_MAKE_STOPPED(s) (((int) (s) << 8) + 3)
206 #define M32C_STEPPED(r) ((r) == M32C_MAKE_STEPPED ())
207 #define M32C_HIT_BREAK(r) ((r) == M32C_MAKE_HIT_BREAK ())
208 #define M32C_EXITED(r) (((r) & 0xff) == 2)
209 #define M32C_EXIT_STATUS(r) ((r) >> 8)
210 #define M32C_STOPPED(r) (((r) & 0xff) == 3)
211 #define M32C_STOP_SIG(r) ((r) >> 8)
213 /* The step result for the current step. Global to allow
214 communication between the stepping function and the system
216 extern int step_result;
218 /* Used to detect heap/stack collisions */
219 extern unsigned int heaptop;
220 extern unsigned int heapbottom;
222 /* Points to one of the below functions, set by m32c_load(). */
223 extern int (*decode_opcode) (void);
225 extern int decode_r8c (void);
226 extern int decode_m32c (void);
228 extern void trace_register_changes (void);
230 extern void m32c_dump_all_registers (void);