Subversion Repositories openrisc

/* cpu.h --- declarations for the RX core.

Copyright (C) 2005, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.

Contributed by Red Hat, Inc.

This file is part of the GNU simulators.

This program is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 3 of the License, or

(at your option) any later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include <stdint.h>

#include <setjmp.h>

extern int verbose;

extern int trace;

extern int enable_counting;

typedef uint8_t QI;

typedef uint16_t HI;

typedef uint32_t SI;

typedef uint64_t DI;

extern int rx_in_gdb;

extern int rx_big_endian;

typedef struct

{

  SI r[16];

  SI r_psw;

  SI r_pc;

  SI r_usp;

  SI r_fpsw;

  SI r__reserved_cr_4;

  SI r__reserved_cr_5;

  SI r__reserved_cr_6;

  SI r__reserved_cr_7;

  SI r_bpsw;

  SI r_bpc;

  SI r_isp;

  SI r_fintv;

  SI r_intb;

  SI r__reserved_cr_13;

  SI r__reserved_cr_14;

  SI r__reserved_cr_15;

  SI r__reserved_cr_16;

  SI r__reserved_cr_17;

  SI r__reserved_cr_18;

  SI r__reserved_cr_19;

  SI r__reserved_cr_20;

  SI r__reserved_cr_21;

  SI r__reserved_cr_22;

  SI r__reserved_cr_23;

  SI r__reserved_cr_24;

  SI r__reserved_cr_25;

  SI r__reserved_cr_26;

  SI r__reserved_cr_27;

  SI r__reserved_cr_28;

  SI r__reserved_cr_29;

  SI r__reserved_cr_30;

  SI r__reserved_cr_31;

  SI r_temp;

  DI r_acc;

} regs_type;

#define sp      0

#define psw     16

#define pc      17

#define usp     18

#define fpsw    19

#define bpsw    24

#define bpc     25

#define isp     26

#define fintv   27

#define intb    28

#define r_temp_idx 48

#define acc64   49

#define acchi   50

#define accmi   51

#define acclo   52

extern regs_type regs;

#define FLAGBIT_C       0x00000001

#define FLAGBIT_Z       0x00000002

#define FLAGBIT_S       0x00000004

#define FLAGBIT_O       0x00000008

#define FLAGBIT_I       0x00010000

#define FLAGBIT_U       0x00020000

#define FLAGBIT_PM      0x00100000

#define FLAGBITS_IPL    0x0f000000

#define FLAGSHIFT_IPL   24

#define FPSWBITS_RM     0x00000003

#define FPSWBITS_CV     0x00000004 /* invalid operation */

#define FPSWBITS_CO     0x00000008 /* overflow */

#define FPSWBITS_CZ     0x00000010 /* divide-by-zero */

#define FPSWBITS_CU     0x00000020 /* underflow */

#define FPSWBITS_CX     0x00000040 /* inexact */

#define FPSWBITS_CE     0x00000080 /* unimplemented processing */

#define FPSWBITS_CMASK  0x000000fc /* all the above */

#define FPSWBITS_DN     0x00000100

#define FPSW_CESH       8

#define FPSWBITS_EV     0x00000400

#define FPSWBITS_EO     0x00000800

#define FPSWBITS_EZ     0x00001000

#define FPSWBITS_EU     0x00002000

#define FPSWBITS_EX     0x00004000

#define FPSW_EFSH       16

#define FPSW_CFSH       24

#define FPSWBITS_FV     0x04000000

#define FPSWBITS_FO     0x08000000

#define FPSWBITS_FZ     0x10000000

#define FPSWBITS_FU     0x20000000

#define FPSWBITS_FX     0x40000000

#define FPSWBITS_FSUM   0x80000000

#define FPSWBITS_FMASK  0x7c000000

#define FPSWBITS_CLEAR  0xffffff03 /* masked at start of any FP opcode */

#define FPRM_NEAREST    0

#define FPRM_ZERO       1

#define FPRM_PINF       2

#define FPRM_NINF       3

extern char *reg_names[];

extern int rx_flagmask;

extern int rx_flagand;

extern int rx_flagor;

extern unsigned int b2mask[];

extern unsigned int b2signbit[];

extern int b2maxsigned[];

extern int b2minsigned[];

void init_regs (void);

void stack_heap_stats (void);

void set_pointer_width (int bytes);

unsigned int get_reg (int id);

unsigned long long get_reg64 (int id);

void put_reg (int id, unsigned int value);

void put_reg64 (int id, unsigned long long value);

void set_flags (int mask, int newbits);

void set_oszc (long long value, int bytes, int c);

void set_szc (long long value, int bytes, int c);

void set_osz (long long value, int bytes);

void set_sz (long long value, int bytes);

void set_zc (int z, int c);

void set_c (int c);

const char *bits (int v, int b);

int condition_true (int cond_id);

#define FLAG(f) ((regs.r_psw & f) ? 1 : 0)

#define FLAG_C  FLAG(FLAGBIT_C)

#define FLAG_D  FLAG(FLAGBIT_D)

#define FLAG_Z  FLAG(FLAGBIT_Z)

#define FLAG_S  FLAG(FLAGBIT_S)

#define FLAG_B  FLAG(FLAGBIT_B)

#define FLAG_O  FLAG(FLAGBIT_O)

#define FLAG_I  FLAG(FLAGBIT_I)

#define FLAG_U  FLAG(FLAGBIT_U)

#define FLAG_PM FLAG(FLAGBIT_PM)

/* Instruction step return codes.

   Suppose one of the decode_* functions below returns a value R:

   - If RX_STEPPED (R), then the single-step completed normally.

   - If RX_HIT_BREAK (R), then the program hit a breakpoint.

   - If RX_EXITED (R), then the program has done an 'exit' system

     call, and the exit code is RX_EXIT_STATUS (R).

   - If RX_STOPPED (R), then a signal (number RX_STOP_SIG (R)) was

     generated.

   For building step return codes:

   - RX_MAKE_STEPPED is the return code for finishing a normal step.

   - RX_MAKE_HIT_BREAK is the return code for hitting a breakpoint.

   - RX_MAKE_EXITED (C) is the return code for exiting with status C.

   - RX_MAKE_STOPPED (S) is the return code for stopping on signal S.  */

#define RX_MAKE_STEPPED()   (0)

#define RX_MAKE_HIT_BREAK() (1)

#define RX_MAKE_EXITED(c)   (((int) (c) << 8) + 2)

#define RX_MAKE_STOPPED(s)  (((int) (s) << 8) + 3)

#define RX_STEPPED(r)       ((r) == RX_MAKE_STEPPED ())

#define RX_HIT_BREAK(r)     ((r) == RX_MAKE_HIT_BREAK ())

#define RX_EXITED(r)        (((r) & 0xff) == 2)

#define RX_EXIT_STATUS(r)   ((r) >> 8)

#define RX_STOPPED(r)       (((r) & 0xff) == 3)

#define RX_STOP_SIG(r)      ((r) >> 8)

/* The step result for the current step.  Global to allow

   communication between the stepping function and the system

   calls.  */

extern int step_result;

extern unsigned int rx_cycles;

/* Used to detect heap/stack collisions.  */

extern unsigned int heaptop;

extern unsigned int heapbottom;

extern int decode_opcode (void);

extern void trace_register_changes ();

extern void generate_access_exception (void);

extern jmp_buf decode_jmp_buf;