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/**********************************/
/* */
/* Copyright 2000, David Grant */
/* */
/* see LICENSE for more details */
/* */
/**********************************/
#ifndef MEMORY_H
#define MEMORY_H
/* Memory definitions */
struct _memory_core {
unsigned int pc;
unsigned int pc_instruction_begin;
unsigned int sr;
unsigned int mbar;
unsigned int mbar_size;
unsigned int mbar2;
unsigned int mbar2_size;
unsigned int rambar;
unsigned int rambar1;
unsigned int rombar;
unsigned int vbr;
unsigned int cacr;
unsigned int d[8];
unsigned int a[8];
char (*mbar_write)(short size, int offset, unsigned int value);
char (*mbar_read)(unsigned int * result, short size, int offset);
char (*mbar2_write)(short size, int offset, unsigned int value);
char (*mbar2_read)(unsigned int * result, short size, int offset);
};
/* Actually declared in memory.c */
extern struct _memory_core memory_core;
struct _SR {
#ifndef WORDS_BIGENDIAN
unsigned C:1;
unsigned V:1;
unsigned Z:1;
unsigned N:1;
unsigned X:1;
unsigned Unused:3;
unsigned InterruptPriorityMask:3;
unsigned Unused2:1;
unsigned M:1;
unsigned S:1;
unsigned Unused3:1;
unsigned T:1;
unsigned pad:16;
#else
unsigned pad:16;
unsigned T:1;
unsigned Unused3:1;
unsigned S:1;
unsigned M:1;
unsigned Unused2:1;
unsigned InterruptPriorityMask:3;
unsigned Unused:3;
unsigned X:1;
unsigned N:1;
unsigned Z:1;
unsigned V:1;
unsigned C:1;
#endif
};
extern struct _SR *SRBits;
void memory_reset(void);
void Memory_Init(void);
void Memory_DeInit(void);
/* Memory seek */
char memory_seek(unsigned int offset);
/* Memory retrive */
#define Memory_RetrLongWord(V,Offset) Memory_Retr(V,32,Offset)
#define Memory_RetrWord(V,Offset) Memory_Retr(V,16,Offset)
#define Memory_RetrByte(V,Offset) Memory_Retr(V,8,Offset)
char Memory_Retr(unsigned int *Result, short Size, int Offset);
/* Memory Store */
#define Memory_StorLongWord(Offset,Value) Memory_Stor(32,Offset,Value)
#define Memory_StorWord(Offset,Value) Memory_Stor(16,Offset,Value)
#define Memory_StorByte(Offset,Value) Memory_Stor(8,Offset,Value)
char Memory_Stor(short Size, int Offset, unsigned int Value);
/* Memory retrive, and update the PC */
#define Memory_RetrByteFromPC(V) Memory_RetrFromPC(V,8)
#define Memory_RetrWordFromPC(V) Memory_RetrFromPC(V,16)
#define Memory_RetrLongWordFromPC(V) Memory_RetrFromPC(V,32)
char Memory_RetrFromPC(unsigned int *Result, short Size);
void memory_update(void);
enum {
SR_C = 0x0001,
SR_V = 0x0002,
SR_Z = 0x0004,
SR_N = 0x0008,
SR_X = 0x0010
};
/* Memory modules */
struct _memory_segment {
char *name;
unsigned int base;
unsigned int *base_register;
unsigned int mask;
unsigned short interrupt_line;
char *code;
unsigned int code_len;
void (*fini)(struct _memory_segment *s);
char (*read)(struct _memory_segment *s, unsigned int *result, short size, unsigned int offset);
char (*write)(struct _memory_segment *s, short size, unsigned int offset, unsigned int value);
void (*reset)(struct _memory_segment *s);
void (*update)(struct _memory_segment *s);
void *data;
};
struct _memory_module {
char *name;
void (*setup)(struct _memory_segment *s);
};
void memory_module_register(char *name,
void (*setup)(struct _memory_segment *s));
//void memory_module_setup_segment(char *module_name, char *data);
void memory_module_setup_segment(char *module_name, int base_register, int base, int len);
struct _memory_segment *memory_find_segment_for(unsigned int offset);
void memory_core_set_reset_values(char *s);
void memory_dump_segments(void);
#endif
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