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/* Parameters for execution on a Fujitsu FR30 processor.

   Copyright 1999, 2000 Free Software Foundation, Inc.

   This file is part of GDB.

   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 2 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, write to the Free Software

   Foundation, Inc., 59 Temple Place - Suite 330,

   Boston, MA 02111-1307, USA.  */

#include "regcache.h"

#define FR30_GENREGS            16

#define FR30_DEDICATEDREGS      8

#define FR30_REGSIZE            4       /* bytes */

#define NUM_REGS (FR30_GENREGS + FR30_DEDICATEDREGS)

#define REGISTER_BYTES ((FR30_GENREGS + FR30_DEDICATEDREGS)*FR30_REGSIZE)

/* Index within `registers' of the first byte of the space for

   register N.  */

#define REGISTER_BYTE(N) ((N) * FR30_REGSIZE)

/* Initializer for an array of names of registers.

   There should be NUM_REGS strings in this initializer.  */

#define REGISTER_NAMES \

{ "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", \

  "r9", "r10", "r11", "r12", "r13", "r14", "r15", \

  "pc", "ps", "tbr", "rp", "ssp", "usp", "mdh", "mdl" }

/* Offset from address of function to start of its code.

   Zero on most machines.  */

#define FUNCTION_START_OFFSET 0

/* Amount PC must be decremented by after a breakpoint.

   This is often the number of bytes in BREAKPOINT

   but not always.  */

#define DECR_PC_AFTER_BREAK 0

/* Stack grows downward.  */

#define INNER_THAN(lhs,rhs) ((lhs) < (rhs))

#define TARGET_BYTE_ORDER BIG_ENDIAN

#define R0_REGNUM  0

#define R1_REGNUM  1

#define R2_REGNUM  2

#define R3_REGNUM  3

#define R4_REGNUM  4

#define R5_REGNUM  5

#define R6_REGNUM  6

#define R7_REGNUM  7

#define R8_REGNUM  8

#define R9_REGNUM  9

#define R10_REGNUM  10

#define R11_REGNUM  11

#define R12_REGNUM  12

#define R13_REGNUM  13

#define FP_REGNUM 14            /* Frame pointer */

#define SP_REGNUM 15            /* Stack pointer */

#define PC_REGNUM 16            /* Program counter */

#define RP_REGNUM 19            /* Return pointer */

#define FIRST_ARGREG    R4_REGNUM       /* first arg (or struct ret val addr) */

#define LAST_ARGREG     R7_REGNUM       /* fourth (or third arg) */

#define RETVAL_REG      R4_REGNUM       /* return vaue */

/* Say how long (ordinary) registers are.  This is a piece of bogosity

   used in push_word and a few other places; REGISTER_RAW_SIZE is the

   real way to know how big a register is.  */

#define REGISTER_SIZE FR30_REGSIZE

/* Number of bytes of storage in the actual machine representation

   for register N.  */

#define REGISTER_RAW_SIZE(N) FR30_REGSIZE

/* Largest value REGISTER_RAW_SIZE can have.  */

#define MAX_REGISTER_RAW_SIZE FR30_REGSIZE

/* Number of bytes of storage in the program's representation

   for register N.  */

#define REGISTER_VIRTUAL_SIZE(N) REGISTER_RAW_SIZE(N)

/* Largest value REGISTER_VIRTUAL_SIZE can have.  */

#define MAX_REGISTER_VIRTUAL_SIZE FR30_REGSIZE

extern void fr30_pop_frame (void);

#define POP_FRAME fr30_pop_frame()

#define USE_GENERIC_DUMMY_FRAMES 1

#define CALL_DUMMY                   {0}

#define CALL_DUMMY_START_OFFSET      (0)

#define CALL_DUMMY_BREAKPOINT_OFFSET (0)

#define CALL_DUMMY_LOCATION          AT_ENTRY_POINT

#define FIX_CALL_DUMMY(DUMMY, START, FUNADDR, NARGS, ARGS, TYPE, GCCP)

#define CALL_DUMMY_ADDRESS()         entry_point_address ()

#define PUSH_RETURN_ADDRESS(PC, SP)  (write_register(RP_REGNUM, CALL_DUMMY_ADDRESS()), SP)

#define PUSH_DUMMY_FRAME        generic_push_dummy_frame ()

/* Number of bytes at start of arglist that are not really args.  */

#define FRAME_ARGS_SKIP 0

/* Return the GDB type object for the "standard" data type

   of data in register N.  */

#define REGISTER_VIRTUAL_TYPE(REG) builtin_type_int

/* Extract from an array REGBUF containing the (raw) register state

   a function return value of type TYPE, and copy that, in virtual format,

   into VALBUF.  */

#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \

    memcpy (VALBUF, REGBUF + REGISTER_BYTE(RETVAL_REG) +  \

        (TYPE_LENGTH(TYPE) < 4 ? 4 - TYPE_LENGTH(TYPE) : 0), TYPE_LENGTH (TYPE))

/* Extract from an array REGBUF containing the (raw) register state

   the address in which a function should return its structure value,

   as a CORE_ADDR (or an expression that can be used as one).  */

#define EXTRACT_STRUCT_VALUE_ADDRESS(REGBUF) \

  extract_address (REGBUF + REGISTER_BYTE (RETVAL_REG), \

                   REGISTER_RAW_SIZE (RETVAL_REG))

#define STORE_STRUCT_RETURN(ADDR, SP) \

  { write_register (RETVAL_REG, (ADDR)); }

#define FRAME_ARGS_ADDRESS(fi) ((fi)->frame)

#define FRAME_LOCALS_ADDRESS(fi) ((fi)->frame)

/* Return number of args passed to a frame.

   Can return -1, meaning no way to tell.  */

#define FRAME_NUM_ARGS(fi) (-1)

/* Forward decls for prototypes */

struct frame_info;

struct frame_saved_regs;

struct type;

struct value;

#define EXTRA_FRAME_INFO \

  struct frame_saved_regs fsr;  \

  int framesize;                \

  int frameoffset;              \

  int framereg;

extern CORE_ADDR fr30_frame_chain (struct frame_info *fi);

#define FRAME_CHAIN(fi) fr30_frame_chain (fi)

extern CORE_ADDR fr30_frame_saved_pc (struct frame_info *);

#define FRAME_SAVED_PC(fi) (fr30_frame_saved_pc (fi))

#define SAVED_PC_AFTER_CALL(fi) read_register (RP_REGNUM)

extern CORE_ADDR fr30_skip_prologue (CORE_ADDR pc);

#define SKIP_PROLOGUE(pc) (fr30_skip_prologue (pc))

/* Write into appropriate registers a function return value of type

   TYPE, given in virtual format.  VALBUF is in the target byte order;

   it's typically the VALUE_CONTENTS of some struct value, and those

   are in the target's byte order.  */

extern void fr30_store_return_value (struct type *type, char *valbuf);

#define STORE_RETURN_VALUE(TYPE,VALBUF) \

  (fr30_store_return_value ((TYPE), (VALBUF)))

/* Put here the code to store, into a struct frame_saved_regs,

   the addresses of the saved registers of frame described by FRAME_INFO.

   This includes special registers such as pc and fp saved in special

   ways in the stack frame.  sp is even more special:

   the address we return for it IS the sp for the next frame.  */

#define FRAME_FIND_SAVED_REGS(fi, regaddr) regaddr = fi->fsr

/* Use INT #BREAKPOINT_INTNUM instruction for breakpoint */

#define FR30_BREAKOP    0x1f    /* opcode, type D instruction */

#define BREAKPOINT_INTNUM 9     /* one of the reserved traps */

#define BREAKPOINT {FR30_BREAKOP, BREAKPOINT_INTNUM}

/* Define this for Wingdb */

#define TARGET_FR30

/* IEEE format floating point */

#define IEEE_FLOAT (1)

/* Define other aspects of the stack frame.  */

/* An expression that tells us whether the function invocation represented

   by FI does not have a frame on the stack associated with it.  */

extern int fr30_frameless_function_invocation (struct frame_info *frame);

#define FRAMELESS_FUNCTION_INVOCATION(FI) (fr30_frameless_function_invocation (FI));

extern void fr30_init_extra_frame_info (struct frame_info *fi);

#define INIT_EXTRA_FRAME_INFO(fromleaf, fi) fr30_init_extra_frame_info (fi)

#define FRAME_CHAIN_VALID(FP, FI)       generic_file_frame_chain_valid (FP, FI)

extern CORE_ADDR

fr30_push_arguments (int nargs, struct value **args, CORE_ADDR sp,

                     int struct_return, CORE_ADDR struct_addr);

#define PUSH_ARGUMENTS(NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR) \

  (fr30_push_arguments (NARGS, ARGS, SP, STRUCT_RETURN, STRUCT_ADDR))

#define PC_IN_CALL_DUMMY(PC, SP, FP) generic_pc_in_call_dummy (PC, SP, FP)

/* Fujitsu's ABI requires all structs to be passed using a pointer.

   That is obviously not very efficient, so I am leaving the definitions

   to make gdb work with GCC style struct passing, in case we decide

   to go for better performance, rather than for compatibility with

   Fujitsu (just change STRUCT_ALWAYS_BY_ADDR to 0) */

#define STRUCT_ALWAYS_BY_ADDR   1

#if(STRUCT_ALWAYS_BY_ADDR)

#define REG_STRUCT_HAS_ADDR(gcc_p,type)         1

#else

/* more standard GCC (optimized) */

#define REG_STRUCT_HAS_ADDR(gcc_p,type)         \

                ((TYPE_LENGTH(type) > 4) && (TYPE_LENGTH(type) & 0x3))

#endif

/* alway return struct by value by input pointer */

#define USE_STRUCT_CONVENTION(GCC_P, TYPE)      1

/* The stack should always be aligned on a four-word boundary.  */

#define STACK_ALIGN(len) (((len) + 3) & ~3)

/* I think the comment about this in value_arg_coerce is wrong; this

   should be true on any system where you can rely on the prototyping

   information.  When this is true, value_arg_coerce will promote

   floats to doubles iff the function is not prototyped.  */

#define COERCE_FLOAT_TO_DOUBLE(formal, actual) (1)