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/* cpu.h --- declarations for the M32C core.
Copyright (C) 2005-2022 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/>. */
extern int verbose;
extern int trace;
extern int enable_counting;
extern int in_gdb;
typedef unsigned char QI;
typedef unsigned short HI;
typedef unsigned long SI;
typedef unsigned long long DI;
#define CPU_R8C 0x11
#define CPU_M16C 0x12
#define CPU_M32CM 0x23
#define CPU_M32C 0x24
extern int m32c_cpu;
void m32c_set_cpu (int cpu);
#define A16 (m32c_cpu & 0x10)
#define A24 (m32c_cpu & 0x20)
typedef struct
{
HI r_r0;
HI r_r2;
HI r_r1;
HI r_r3;
SI r_a0;
SI r_a1;
SI r_sb;
SI r_fb;
} reg_bank_type;
typedef struct
{
reg_bank_type r[2];
QI r_intbh;
HI r_intbl;
SI r_usp;
SI r_isp;
SI r_pc;
HI r_flags;
} regs_type;
extern regs_type regs;
extern int addr_mask;
extern int membus_mask;
#define FLAGBIT_C 0x0001
#define FLAGBIT_D 0x0002
#define FLAGBIT_Z 0x0004
#define FLAGBIT_S 0x0008
#define FLAGBIT_B 0x0010
#define FLAGBIT_O 0x0020
#define FLAGBIT_I 0x0040
#define FLAGBIT_U 0x0080
#define REG_BANK (regs.r_flags & FLAG_B ? 1 : 0)
typedef enum
{
mem,
r0, r0h, r0l,
r1, r1h, r1l,
r2, r2r0,
r3, r3r1,
r3r1r2r0,
r3r2r1r0,
a0,
a1, a1a0,
sb, fb,
intb, intbl, intbh,
sp, usp, isp, pc, flags,
num_regs
} reg_id;
extern char *reg_names[];
extern int reg_bytes[];
extern unsigned int b2mask[];
extern unsigned int b2signbit[];
extern int b2maxsigned[];
extern int b2minsigned[];
/* address of the opcode that just decoded, and thus caused the
exception. */
extern int m32c_opcode_pc;
void init_regs (void);
void stack_heap_stats (void);
void set_pointer_width (int bytes);
unsigned int get_reg (reg_id id);
DI get_reg_ll (reg_id id);
void put_reg (reg_id id, unsigned int value);
void put_reg_ll (reg_id id, DI value);
void set_flags (int mask, int newbits);
void set_oszc (int value, int bytes, int c);
void set_szc (int value, int bytes, int c);
void set_osz (int value, int bytes);
void set_sz (int value, int bytes);
void set_zc (int z, int c);
void set_c (int c);
const char *bits (int v, int b);
typedef struct
{
QI bytes;
QI mem;
HI mask;
union
{
unsigned int addr;
reg_id reg;
} u;
} srcdest;
void decode_indirect (int src_indirect, int dest_indirect);
void decode_index (int src_addend, int dest_addend);
/* r8c */
srcdest decode_srcdest4 (int destcode, int bw);
srcdest decode_dest3 (int destcode, int bw);
srcdest decode_src2 (int srccode, int bw, int d);
srcdest decode_dest1 (int destcode, int bw);
srcdest decode_jumpdest (int destcode, int w);
srcdest decode_cr (int crcode);
srcdest decode_cr_b (int crcode, int bank);
#define CR_B_DCT0 0
#define CR_B_INTB 1
#define CR_B_DMA0 2
/* m32c */
srcdest decode_dest23 (int ddd, int dd, int bytes);
srcdest decode_src23 (int sss, int ss, int bytes);
srcdest decode_src3 (int sss, int bytes);
srcdest decode_dest2 (int dd, int bytes);
srcdest widen_sd (srcdest sd);
srcdest reg_sd (reg_id reg);
/* Mask has the one appropriate bit set. */
srcdest decode_bit (int destcode);
srcdest decode_bit11 (int op0);
int get_bit (srcdest sd);
void put_bit (srcdest sd, int val);
int get_bit2 (srcdest sd, int bit);
void put_bit2 (srcdest sd, int bit, int val);
int get_src (srcdest sd);
void put_dest (srcdest sd, int value);
int condition_true (int cond_id);
#define FLAG(f) (regs.r_flags & 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)
/* Instruction step return codes.
Suppose one of the decode_* functions below returns a value R:
- If M32C_STEPPED (R), then the single-step completed normally.
- If M32C_HIT_BREAK (R), then the program hit a breakpoint.
- If M32C_EXITED (R), then the program has done an 'exit' system
call, and the exit code is M32C_EXIT_STATUS (R).
- If M32C_STOPPED (R), then a signal (number M32C_STOP_SIG (R)) was
generated.
For building step return codes:
- M32C_MAKE_STEPPED is the return code for finishing a normal step.
- M32C_MAKE_HIT_BREAK is the return code for hitting a breakpoint.
- M32C_MAKE_EXITED (C) is the return code for exiting with status C.
- M32C_MAKE_STOPPED (S) is the return code for stopping on signal S. */
#define M32C_MAKE_STEPPED() (0)
#define M32C_MAKE_HIT_BREAK() (1)
#define M32C_MAKE_EXITED(c) (((int) (c) << 8) + 2)
#define M32C_MAKE_STOPPED(s) (((int) (s) << 8) + 3)
#define M32C_STEPPED(r) ((r) == M32C_MAKE_STEPPED ())
#define M32C_HIT_BREAK(r) ((r) == M32C_MAKE_HIT_BREAK ())
#define M32C_EXITED(r) (((r) & 0xff) == 2)
#define M32C_EXIT_STATUS(r) ((r) >> 8)
#define M32C_STOPPED(r) (((r) & 0xff) == 3)
#define M32C_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;
/* Used to detect heap/stack collisions */
extern unsigned int heaptop;
extern unsigned int heapbottom;
/* Points to one of the below functions, set by m32c_load(). */
extern int (*decode_opcode) (void);
extern int decode_r8c (void);
extern int decode_m32c (void);
extern void trace_register_changes (void);
extern void m32c_dump_all_registers (void);
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