1 /* cpu.h --- declarations for the M32C core. 2 3 Copyright (C) 2005, 2007, 2008, 2009, 2010, 2011 4 Free Software Foundation, Inc. 5 Contributed by Red Hat, Inc. 6 7 This file is part of the GNU simulators. 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 3 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 21 22 23 extern int verbose; 24 extern int trace; 25 extern int enable_counting; 26 27 extern int in_gdb; 28 29 typedef unsigned char QI; 30 typedef unsigned short HI; 31 typedef unsigned long SI; 32 typedef unsigned long long DI; 33 34 #define CPU_R8C 0x11 35 #define CPU_M16C 0x12 36 #define CPU_M32CM 0x23 37 #define CPU_M32C 0x24 38 extern int m32c_cpu; 39 void m32c_set_cpu (int cpu); 40 41 #define A16 (m32c_cpu & 0x10) 42 #define A24 (m32c_cpu & 0x20) 43 44 typedef struct 45 { 46 HI r_r0; 47 HI r_r2; 48 HI r_r1; 49 HI r_r3; 50 SI r_a0; 51 SI r_a1; 52 SI r_sb; 53 SI r_fb; 54 } reg_bank_type; 55 56 typedef struct 57 { 58 reg_bank_type r[2]; 59 QI r_intbh; 60 HI r_intbl; 61 SI r_usp; 62 SI r_isp; 63 SI r_pc; 64 HI r_flags; 65 } regs_type; 66 67 extern regs_type regs; 68 extern int addr_mask; 69 extern int membus_mask; 70 71 #define FLAGBIT_C 0x0001 72 #define FLAGBIT_D 0x0002 73 #define FLAGBIT_Z 0x0004 74 #define FLAGBIT_S 0x0008 75 #define FLAGBIT_B 0x0010 76 #define FLAGBIT_O 0x0020 77 #define FLAGBIT_I 0x0040 78 #define FLAGBIT_U 0x0080 79 80 #define REG_BANK (regs.r_flags & FLAG_B ? 1 : 0) 81 82 typedef enum 83 { 84 mem, 85 r0, r0h, r0l, 86 r1, r1h, r1l, 87 r2, r2r0, 88 r3, r3r1, 89 r3r1r2r0, 90 r3r2r1r0, 91 a0, 92 a1, a1a0, 93 sb, fb, 94 intb, intbl, intbh, 95 sp, usp, isp, pc, flags, 96 num_regs 97 } reg_id; 98 99 extern char *reg_names[]; 100 extern int reg_bytes[]; 101 102 extern unsigned int b2mask[]; 103 extern unsigned int b2signbit[]; 104 extern int b2maxsigned[]; 105 extern int b2minsigned[]; 106 107 /* address of the opcode that just decoded, and thus caused the 108 exception. */ 109 extern int m32c_opcode_pc; 110 111 void init_regs (void); 112 void stack_heap_stats (void); 113 void set_pointer_width (int bytes); 114 unsigned int get_reg (reg_id id); 115 DI get_reg_ll (reg_id id); 116 void put_reg (reg_id id, unsigned int value); 117 void put_reg_ll (reg_id id, DI value); 118 119 void set_flags (int mask, int newbits); 120 void set_oszc (int value, int bytes, int c); 121 void set_szc (int value, int bytes, int c); 122 void set_osz (int value, int bytes); 123 void set_sz (int value, int bytes); 124 void set_zc (int z, int c); 125 void set_c (int c); 126 127 const char *bits (int v, int b); 128 129 typedef struct 130 { 131 QI bytes; 132 QI mem; 133 HI mask; 134 union 135 { 136 unsigned int addr; 137 reg_id reg; 138 } u; 139 } srcdest; 140 141 void decode_indirect (int src_indirect, int dest_indirect); 142 void decode_index (int src_addend, int dest_addend); 143 144 /* r8c */ 145 srcdest decode_srcdest4 (int destcode, int bw); 146 srcdest decode_dest3 (int destcode, int bw); 147 srcdest decode_src2 (int srccode, int bw, int d); 148 srcdest decode_dest1 (int destcode, int bw); 149 srcdest decode_jumpdest (int destcode, int w); 150 srcdest decode_cr (int crcode); 151 srcdest decode_cr_b (int crcode, int bank); 152 #define CR_B_DCT0 0 153 #define CR_B_INTB 1 154 #define CR_B_DMA0 2 155 156 /* m32c */ 157 srcdest decode_dest23 (int ddd, int dd, int bytes); 158 srcdest decode_src23 (int sss, int ss, int bytes); 159 srcdest decode_src3 (int sss, int bytes); 160 srcdest decode_dest2 (int dd, int bytes); 161 162 srcdest widen_sd (srcdest sd); 163 srcdest reg_sd (reg_id reg); 164 165 /* Mask has the one appropriate bit set. */ 166 srcdest decode_bit (int destcode); 167 srcdest decode_bit11 (int op0); 168 int get_bit (srcdest sd); 169 void put_bit (srcdest sd, int val); 170 int get_bit2 (srcdest sd, int bit); 171 void put_bit2 (srcdest sd, int bit, int val); 172 173 int get_src (srcdest sd); 174 void put_dest (srcdest sd, int value); 175 176 int condition_true (int cond_id); 177 178 #define FLAG(f) (regs.r_flags & f ? 1 : 0) 179 #define FLAG_C FLAG(FLAGBIT_C) 180 #define FLAG_D FLAG(FLAGBIT_D) 181 #define FLAG_Z FLAG(FLAGBIT_Z) 182 #define FLAG_S FLAG(FLAGBIT_S) 183 #define FLAG_B FLAG(FLAGBIT_B) 184 #define FLAG_O FLAG(FLAGBIT_O) 185 #define FLAG_I FLAG(FLAGBIT_I) 186 #define FLAG_U FLAG(FLAGBIT_U) 187 188 /* Instruction step return codes. 189 Suppose one of the decode_* functions below returns a value R: 190 - If M32C_STEPPED (R), then the single-step completed normally. 191 - If M32C_HIT_BREAK (R), then the program hit a breakpoint. 192 - If M32C_EXITED (R), then the program has done an 'exit' system 193 call, and the exit code is M32C_EXIT_STATUS (R). 194 - If M32C_STOPPED (R), then a signal (number M32C_STOP_SIG (R)) was 195 generated. 196 197 For building step return codes: 198 - M32C_MAKE_STEPPED is the return code for finishing a normal step. 199 - M32C_MAKE_HIT_BREAK is the return code for hitting a breakpoint. 200 - M32C_MAKE_EXITED (C) is the return code for exiting with status C. 201 - M32C_MAKE_STOPPED (S) is the return code for stopping on signal S. */ 202 #define M32C_MAKE_STEPPED() (0) 203 #define M32C_MAKE_HIT_BREAK() (1) 204 #define M32C_MAKE_EXITED(c) (((int) (c) << 8) + 2) 205 #define M32C_MAKE_STOPPED(s) (((int) (s) << 8) + 3) 206 207 #define M32C_STEPPED(r) ((r) == M32C_MAKE_STEPPED ()) 208 #define M32C_HIT_BREAK(r) ((r) == M32C_MAKE_HIT_BREAK ()) 209 #define M32C_EXITED(r) (((r) & 0xff) == 2) 210 #define M32C_EXIT_STATUS(r) ((r) >> 8) 211 #define M32C_STOPPED(r) (((r) & 0xff) == 3) 212 #define M32C_STOP_SIG(r) ((r) >> 8) 213 214 /* The step result for the current step. Global to allow 215 communication between the stepping function and the system 216 calls. */ 217 extern int step_result; 218 219 /* Used to detect heap/stack collisions */ 220 extern unsigned int heaptop; 221 extern unsigned int heapbottom; 222 223 /* Points to one of the below functions, set by m32c_load(). */ 224 extern int (*decode_opcode) (); 225 226 extern int decode_r8c (); 227 extern int decode_m32c (); 228 229 extern void trace_register_changes (); 230