/*
 * dlx.h
 * $Id: dlx.h,v 1.20 2005/01/28 16:12:45 obi Exp $
 * Christoph Berg <cb@cs.uni-sb.de>
 * Mark Hillebrand <mah@cs.uni-sb.de>
 */

#ifndef DLX_H
#define DLX_H 1

#define INIT_MEMORY_SIZE 32 * 1024*1024

#define MAX_SIZE 32
#define GPR_SIZE 32
#define STACK_R 29
#define FRAME_R 30
#define LINK_R  31
#define CA_SIZE 32

#define SPR_SR    0
#define SPR_ESR   1
#define SPR_ECA   2 
#define SPR_EPC   3
#define SPR_EDPC  4
#define SPR_EDATA 5
#define SPR_RM    6
#define SPR_IEEEf 7
#define SPR_FCC   8
// VM architecture:
#define SPR_PTO   9
#define SPR_PTL   10
#define SPR_EMODE 11
#define SPR_FRE1  12
#define SPR_FRE2  13
#define SPR_FRE3  14
#define SPR_FRE4  15
#define SPR_MODE  16

#define CA_reset      0x0001
#define CA_ill        0x0002
#define CA_mal        0x0004
#define CA_ipf        0x0008
#define CA_dpf        0x0010 
#define CA_trap       0x0020
#define CA_ovf        0x0040
#define CA_FPUovf     0x0080
#define CA_FPUunf     0x0100
#define CA_FPUinx     0x0200
#define CA_FPUdiv0    0x0400
#define CA_FPUinv     0x0800
#define CA_FPUunimpl  0x1000

#define STOP_TRAP_EXIT 0x1
#define STOP_TRAP_OPEN 0x2
#define STOP_TRAP_CLOSE 0x4
#define STOP_TRAP_READ 0x8
#define STOP_TRAP_WRITE 0x10
#define STOP_TRAP_INTERRUPT 0x20
#define STOP_JISR 0x40
#define STOP_RFE 0x80
#define STOP_WARNING 0x100
#define STOP_BBEND 0x200
#define STOP_CHMOD 0x400
#define STOP_JAL 0x800
#define STOP_JR31 0x1000

#define STEP_WARNING(s,arg...) do { \
    state.stopflag |= STOP_WARNING; printf("  \e[31;7mWARNING\e[0m " s "\n", arg ); \
} while(0)
#define STEP_TRACE(arg...) while( state.trace ) { printf( "  " arg ); printf("\n"); break; }

extern char** spr_name;
extern char* cause_name[CA_SIZE];
// SPR_SIZE variable for architecture
extern int SPR_SIZE;

struct state_s {
    unsigned int pc;
    unsigned int dpc;
    int gpr[MAX_SIZE];
    int fpr[MAX_SIZE];
    int spr[MAX_SIZE];
    char *memory;
    int memorysize;
    int start, maxaddr, text, textsize, data, datasize;
    int stack;

    int lastcfi;    // last instruction was CFI (with delay slot!)
    
    // the following variables control runtime behaviour of the simulator:
    int stopflag;  
    int stopmask;  
    int trace;
    int tracetrap;

    int ex; // external event lines...
};

struct prof_s {
    int instr;
    int nop, inv, inv_r;
    int j, jal, trap, rfe;
    int lb, lh, lw, lbu, lhu, sb, sh, sw;
    int addio, addi, subio, subi;
    int andi, ori, xori, lhgi;
    int clri, sgri, seqi, sgei, slsi, snei, slei, seti;
    int beqz, beqz_taken, bnez, bnez_taken, jr, jalr;
    int slli, srli, srai, sll, srl, sra;
    int addo, add, subo, sub, and, or, xor, lhg;
    int clr, sgr, seq, sge, sls, sne, sle, set;
    int movs2i, movi2s;
    // no profiling for FI/FR type yet
};

extern struct state_s state;
extern struct prof_s prof;

void exrequest(int index);
void exservice(int index);
void init_state();
void print_gpr();
void print_fpr(int mode);
void print_spr();
void print_state();
void init_prof();
void print_prof();
void step();

// TODO not really nice
#define ARCH_VM 0x1
extern int arch;    // is external since used by memory.c
void init_arch(int a);
void init_timer(int t);


#endif