nkeynes@30: /**
nkeynes@30:  * $Id: cpu.h,v 1.6 2005-12-25 05:56:55 nkeynes Exp $
nkeynes@30:  * 
nkeynes@30:  * Generic CPU definitions, primarily for providing information to the GUI.
nkeynes@30:  *
nkeynes@30:  * Copyright (c) 2005 Nathan Keynes.
nkeynes@30:  *
nkeynes@30:  * This program is free software; you can redistribute it and/or modify
nkeynes@30:  * it under the terms of the GNU General Public License as published by
nkeynes@30:  * the Free Software Foundation; either version 2 of the License, or
nkeynes@30:  * (at your option) any later version.
nkeynes@30:  *
nkeynes@30:  * This program is distributed in the hope that it will be useful,
nkeynes@30:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
nkeynes@30:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
nkeynes@30:  * GNU General Public License for more details.
nkeynes@30:  */
nkeynes@9: 
nkeynes@30: #ifndef dream_cpu_H
nkeynes@30: #define dream_cpu_H 1
nkeynes@9: 
nkeynes@30: #include <stdint.h>
nkeynes@9: #include <stdlib.h>
nkeynes@30: #include <glib/gtypes.h>
nkeynes@9: 
nkeynes@9: #ifdef __cplusplus
nkeynes@9: extern "C" {
nkeynes@9: #endif
nkeynes@9: 
nkeynes@9: /**
nkeynes@9:  * Disassembly function pointer typedef.
nkeynes@9:  *
nkeynes@9:  * @param pc Address to disassemble
nkeynes@9:  * @param buffer String buffer to write disassembly into
nkeynes@9:  * @param buflen Maximum length of buffer
nkeynes@9:  * @return next address to disassemble
nkeynes@9:  */
nkeynes@11: typedef uint32_t (*disasm_func_t)(uint32_t pc, char *buffer, int buflen, char *opcode );
nkeynes@11: 
nkeynes@11: typedef int (*is_valid_page_t)(uint32_t pc);
nkeynes@30: typedef gboolean (*step_func_t)();
nkeynes@9: 
nkeynes@9: #define REG_INT 0
nkeynes@9: #define REG_FLT 1
nkeynes@9: #define REG_SPECIAL 2
nkeynes@9: 
nkeynes@9: /**
nkeynes@9:  * Structure that defines a single register in a CPU for display purposes.
nkeynes@9:  */
nkeynes@9: typedef struct reg_desc_struct {
nkeynes@9:     char *name;
nkeynes@9:     int type;
nkeynes@9:     void *value;
nkeynes@9: } reg_desc_t;
nkeynes@9: 
nkeynes@30: /**
nkeynes@30:  * CPU definition structure - basic information and support functions.
nkeynes@30:  */
nkeynes@9: typedef struct cpu_desc_struct {
nkeynes@9:   char *name; /* CPU Name */
nkeynes@9:   disasm_func_t disasm_func; /* Disassembly function */
nkeynes@30:   step_func_t step_func; /* Single step function */
nkeynes@30:   is_valid_page_t is_valid_page_func; /* Test for valid memory page */
nkeynes@9:   size_t instr_size; /* Size of instruction */
nkeynes@9:   char *regs; /* Pointer to start of registers */
nkeynes@9:   size_t regs_size; /* Size of register structure in bytes */
nkeynes@13:   const struct reg_desc_struct *regs_info; /* Description of all registers */
nkeynes@9:   uint32_t *pc; /* Pointer to PC register */
nkeynes@9:   uint32_t *icount; /* Pointer to instruction counter */
nkeynes@9: } *cpu_desc_t;
nkeynes@9: 
nkeynes@9: #ifdef __cplusplus
nkeynes@9: }
nkeynes@9: #endif
nkeynes@9: 
nkeynes@30: #endif /* !dream_cpu_H */