data.h

/*
 *	Contains basic declarations for register, pages,etc.
 */

#ifndef DATA_H
#define DATA_H

#define KERNEL_MODE	0
#define USER_MODE	1

#define R0		0
#define R1		1
#define R2		2
#define R3		3
#define R4		4
#define R5		5
#define R6		6
#define R7		7

#define S0		8
#define S1		9
#define S2		10
#define S3		11
#define S4		12
#define S5		13
#define S6		14
#define S7		15
#define S8		16
#define S9		17
#define S10		18
#define S11		19
#define S12		20
#define S13		21
#define S14		22
#define S15		23

#define T0		24
#define T1		25
#define T2		26
#define T3		27

#define BP_REG		28
#define SP_REG		29
#define IP_REG		30
#define PTBR_REG	31
#define PTLR_REG	32
#define EFR_REG		33

#define NO_USER_REG		8
#define NO_SYS_REG		16
#define NO_TEMP_REG		4
#define NO_SPECIAL_REG	6

#define NUM_REGS		(NO_USER_REG + NO_SPECIAL_REG + NO_SYS_REG + NO_TEMP_REG)
#define WORD_SIZE		16
#define PAGE_SIZE		512
#define NUM_PAGES		64
#define SIZE_OF_MEM		(PAGE_SIZE * NUM_PAGES)		//note Entire memory
#define WORDS_PER_INSTR	2

#define VALID			'1'
#define INVALID			'0'
#define REFERENCED		'1'
#define UNREFERENCED		'0'

#define TYPE_INT		1
#define TYPE_STR		0

#define EX_NONE			-1
#define EX_PAGEFAULT	0
#define EX_ILLINSTR		1
#define EX_ILLMEM		2
#define EX_ARITH		3
#define EX_ILLOPERAND	4

struct {
	char data[WORD_SIZE];
	int flag;
	int flag2;
} yylval;

char reg[NUM_REGS][WORD_SIZE];
char instruction[WORD_SIZE * WORDS_PER_INSTR];
int mode;

typedef struct {
	char word[PAGE_SIZE][WORD_SIZE];
} PAGE;				//WORD refers to one single page (like a page datatype. Note: If possible change WORD to something else)

PAGE page[NUM_PAGES];	//Whole memory

struct address {
	int page_no;
	int word_no;
};

struct Address {
	int page;
	int word;
};

typedef struct Address Address;
#endif