sim/rx/cpu.h

   1 /* cpu.h --- declarations for the RX core.
   2
   3 Copyright (C) 2005, 2007, 2008, 2009 Free Software Foundation, Inc.
   4 Contributed by Red Hat, Inc.
   5
   6 This file is part of the GNU simulators.
   7
   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.
  12
  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.
  17
  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/>.  */
  20
  21 #include <stdint.h>
  22 #include <setjmp.h>
  23
  24 extern int verbose;
  25 extern int trace;
  26 extern int enable_counting;
  27
  28 typedef uint8_t QI;
  29 typedef uint16_t HI;
  30 typedef uint32_t SI;
  31 typedef uint64_t DI;
  32
  33 extern int rx_in_gdb;
  34 extern int rx_big_endian;
  35
  36 typedef struct
  37 {
  38   SI r[16];
  39
  40   SI r_psw;
  41   SI r_pc;
  42   SI r_usp;
  43   SI r_fpsw;
  44   SI r__reserved_cr_4;
  45   SI r__reserved_cr_5;
  46   SI r__reserved_cr_6;
  47   SI r__reserved_cr_7;
  48
  49   SI r_bpsw;
  50   SI r_bpc;
  51   SI r_isp;
  52   SI r_fintv;
  53   SI r_intb;
  54   SI r__reserved_cr_13;
  55   SI r__reserved_cr_14;
  56   SI r__reserved_cr_15;
  57
  58   SI r__reserved_cr_16;
  59   SI r__reserved_cr_17;
  60   SI r__reserved_cr_18;
  61   SI r__reserved_cr_19;
  62   SI r__reserved_cr_20;
  63   SI r__reserved_cr_21;
  64   SI r__reserved_cr_22;
  65   SI r__reserved_cr_23;
  66
  67   SI r__reserved_cr_24;
  68   SI r__reserved_cr_25;
  69   SI r__reserved_cr_26;
  70   SI r__reserved_cr_27;
  71   SI r__reserved_cr_28;
  72   SI r__reserved_cr_29;
  73   SI r__reserved_cr_30;
  74   SI r__reserved_cr_31;
  75
  76   SI r_temp;
  77
  78   DI r_acc;
  79 } regs_type;
  80
  81 #define sp      0
  82 #define psw     16
  83 #define pc      17
  84 #define usp     18
  85 #define fpsw    19
  86
  87 #define bpsw    24
  88 #define bpc     25
  89 #define isp     26
  90 #define fintv   27
  91 #define intb    28
  92
  93 #define r_temp_idx 48
  94 #define acc64   49
  95 #define acchi   50
  96 #define accmi   51
  97 #define acclo   52
  98
  99 extern regs_type regs;
 100
 101 #define FLAGBIT_C       0x00000001
 102 #define FLAGBIT_Z       0x00000002
 103 #define FLAGBIT_S       0x00000004
 104 #define FLAGBIT_O       0x00000008
 105 #define FLAGBIT_I       0x00010000
 106 #define FLAGBIT_U       0x00020000
 107 #define FLAGBIT_PM      0x00100000
 108 #define FLAGBITS_IPL    0x0f000000
 109 #define FLAGSHIFT_IPL   24
 110
 111 #define FPSWBITS_RM     0x00000003
 112 #define FPSWBITS_CV     0x00000004 /* invalid operation */
 113 #define FPSWBITS_CO     0x00000008 /* overflow */
 114 #define FPSWBITS_CZ     0x00000010 /* divide-by-zero */
 115 #define FPSWBITS_CU     0x00000020 /* underflow */
 116 #define FPSWBITS_CX     0x00000040 /* inexact */
 117 #define FPSWBITS_CE     0x00000080 /* unimplemented processing */
 118 #define FPSWBITS_CMASK  0x000000fc /* all the above */
 119 #define FPSWBITS_DN     0x00000100
 120 #define FPSW_CESH       8
 121 #define FPSWBITS_EV     0x00000400
 122 #define FPSWBITS_EO     0x00000800
 123 #define FPSWBITS_EZ     0x00001000
 124 #define FPSWBITS_EU     0x00002000
 125 #define FPSWBITS_EX     0x00004000
 126 #define FPSW_EFSH       16
 127 #define FPSW_CFSH       24
 128 #define FPSWBITS_FV     0x04000000
 129 #define FPSWBITS_FO     0x08000000
 130 #define FPSWBITS_FZ     0x10000000
 131 #define FPSWBITS_FU     0x20000000
 132 #define FPSWBITS_FX     0x40000000
 133 #define FPSWBITS_FSUM   0x80000000
 134 #define FPSWBITS_FMASK  0x7c000000
 135 #define FPSWBITS_CLEAR  0xffffff03 /* masked at start of any FP opcode */
 136
 137 #define FPRM_NEAREST    0
 138 #define FPRM_ZERO       1
 139 #define FPRM_PINF       2
 140 #define FPRM_NINF       3
 141
 142 extern char *reg_names[];
 143
 144 extern int rx_flagmask;
 145 extern int rx_flagand;
 146 extern int rx_flagor;
 147
 148 extern unsigned int b2mask[];
 149 extern unsigned int b2signbit[];
 150 extern int b2maxsigned[];
 151 extern int b2minsigned[];
 152
 153 void init_regs (void);
 154 void stack_heap_stats (void);
 155 void set_pointer_width (int bytes);
 156 unsigned int get_reg (int id);
 157 unsigned long long get_reg64 (int id);
 158 void put_reg (int id, unsigned int value);
 159 void put_reg64 (int id, unsigned long long value);
 160
 161 void set_flags (int mask, int newbits);
 162 void set_oszc (long long value, int bytes, int c);
 163 void set_szc (long long value, int bytes, int c);
 164 void set_osz (long long value, int bytes);
 165 void set_sz (long long value, int bytes);
 166 void set_zc (int z, int c);
 167 void set_c (int c);
 168
 169 const char *bits (int v, int b);
 170
 171 int condition_true (int cond_id);
 172
 173 #define FLAG(f) ((regs.r_psw & f) ? 1 : 0)
 174 #define FLAG_C  FLAG(FLAGBIT_C)
 175 #define FLAG_D  FLAG(FLAGBIT_D)
 176 #define FLAG_Z  FLAG(FLAGBIT_Z)
 177 #define FLAG_S  FLAG(FLAGBIT_S)
 178 #define FLAG_B  FLAG(FLAGBIT_B)
 179 #define FLAG_O  FLAG(FLAGBIT_O)
 180 #define FLAG_I  FLAG(FLAGBIT_I)
 181 #define FLAG_U  FLAG(FLAGBIT_U)
 182 #define FLAG_PM FLAG(FLAGBIT_PM)
 183
 184 /* Instruction step return codes.
 185    Suppose one of the decode_* functions below returns a value R:
 186    - If RX_STEPPED (R), then the single-step completed normally.
 187    - If RX_HIT_BREAK (R), then the program hit a breakpoint.
 188    - If RX_EXITED (R), then the program has done an 'exit' system
 189      call, and the exit code is RX_EXIT_STATUS (R).
 190    - If RX_STOPPED (R), then a signal (number RX_STOP_SIG (R)) was
 191      generated.
 192
 193    For building step return codes:
 194    - RX_MAKE_STEPPED is the return code for finishing a normal step.
 195    - RX_MAKE_HIT_BREAK is the return code for hitting a breakpoint.
 196    - RX_MAKE_EXITED (C) is the return code for exiting with status C.
 197    - RX_MAKE_STOPPED (S) is the return code for stopping on signal S.  */
 198 #define RX_MAKE_STEPPED()   (0)
 199 #define RX_MAKE_HIT_BREAK() (1)
 200 #define RX_MAKE_EXITED(c)   (((int) (c) << 8) + 2)
 201 #define RX_MAKE_STOPPED(s)  (((int) (s) << 8) + 3)
 202
 203 #define RX_STEPPED(r)       ((r) == RX_MAKE_STEPPED ())
 204 #define RX_HIT_BREAK(r)     ((r) == RX_MAKE_HIT_BREAK ())
 205 #define RX_EXITED(r)        (((r) & 0xff) == 2)
 206 #define RX_EXIT_STATUS(r)   ((r) >> 8)
 207 #define RX_STOPPED(r)       (((r) & 0xff) == 3)
 208 #define RX_STOP_SIG(r)      ((r) >> 8)
 209
 210 /* The step result for the current step.  Global to allow
 211    communication between the stepping function and the system
 212    calls.  */
 213 extern int step_result;
 214
 215 extern unsigned int rx_cycles;
 216
 217 /* Used to detect heap/stack collisions.  */
 218 extern unsigned int heaptop;
 219 extern unsigned int heapbottom;
 220
 221 extern int decode_opcode (void);
 222
 223 extern void trace_register_changes ();
 224 extern void generate_access_exception (void);
 225 extern jmp_buf decode_jmp_buf;