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lxdream.org :: lxdream/src/cpu.h
lxdream 0.9.1
released Jun 29
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filename src/cpu.h
changeset 586:2a3ba82cf243
prev429:e581b90c3fb3
next736:a02d1475ccfd
author nkeynes
date Tue Jan 15 20:50:23 2008 +0000 (14 years ago)
permissions -rw-r--r--
last change Merged lxdream-mmu r570:596 to trunk
file annotate diff log raw
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/**
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 * $Id$
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 * 
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 * Generic CPU definitions, primarily for providing information to the GUI.
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 *
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 * Copyright (c) 2005 Nathan Keynes.
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; either version 2 of the License, or
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 * (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 */
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#ifndef dream_cpu_H
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#define dream_cpu_H 1
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#include "lxdream.h"
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#include "mem.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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 * Disassembly function pointer typedef.
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 *
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 * @param pc Address to disassemble
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 * @param buffer String buffer to write disassembly into
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 * @param buflen Maximum length of buffer
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 * @return next address to disassemble
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 */
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typedef uint32_t (*disasm_func_t)(uint32_t pc, char *buffer, int buflen, char *opcode );
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#define REG_INT 0
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#define REG_FLT 1
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#define REG_SPECIAL 2
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/**
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 * Structure that defines a single register in a CPU for display purposes.
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 */
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typedef struct reg_desc_struct {
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    char *name;
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    int type;
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    void *value;
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} reg_desc_t;
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/**
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 * CPU definition structure - basic information and support functions.
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 */
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typedef struct cpu_desc_struct {
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    char *name; /* CPU Name */
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    disasm_func_t disasm_func; /* Disassembly function */
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    gboolean (*step_func)(); /* Single step function */
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    int (*is_valid_page_func)(uint32_t); /* Test for valid memory page */
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    void (*set_breakpoint)(uint32_t, breakpoint_type_t);
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    gboolean (*clear_breakpoint)(uint32_t, breakpoint_type_t);
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    int (*get_breakpoint)(uint32_t);
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    size_t instr_size; /* Size of instruction */
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    char *regs; /* Pointer to start of registers */
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    size_t regs_size; /* Size of register structure in bytes */
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    const struct reg_desc_struct *regs_info; /* Description of all registers */
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    uint32_t *pc; /* Pointer to PC register */
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} const *cpu_desc_t;
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#ifdef __cplusplus
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}
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#endif
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#endif /* !dream_cpu_H */
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