// The OS/K Team licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

#ifndef _ARCH_H
#define _ARCH_H

//#define NDEBUG 1

#define dev_t stddev_t

#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <setjmp.h>
#include <assert.h>
#include <stdarg.h>
#include <limits.h>

#undef dev_t
#define static_assert _Static_assert
#define alignof _Alignof

typedef unsigned int        bool;
typedef unsigned char       uchar;
typedef unsigned short      ushort;
typedef unsigned int        uint;
typedef unsigned long       ulong;

typedef struct reg_t        reg_t;
typedef struct ctx_t        ctx_t;
typedef struct instr_t      instr_t;
typedef struct acc_t        acc_t;
typedef struct arch_t       arch_t;
typedef struct dev_t        dev_t;

void logerr(const char *, ...);
void vlog(const char *, va_list);

// void trace(const char *, ...);
#define trace printf

#define KARCH_MAJOR 0
#define KARCH_MINOR 1
#define KARCH_REVIS 0

struct ctx_t
{
    // Array of NREGS ulong's
    ulong   *rf;

    // Register (names & types) table
    reg_t   *r;

    // Instruction table
    instr_t *i;

    // Instruction currently executing
    instr_t *cur_in;

    // Starting address of instruction currently executing
    ulong cur_pc;

    // Memory and memory size
    uchar  *mp;
    ulong   mz;

    // Devices list head
    dev_t *dh;

    // Instructions executed
    ulong ninstrs;      // totally
    ulong ni_thisfr;    // this frame

    // Last COND field
    uint cond;

    // Dumpinstr switch
    bool dumpsw;
};

#define R(X) ctx->rf[X]

void die(int code) __attribute__((__noreturn__));

void dumpregs(ctx_t *);
void dumpinstr(ctx_t *, ulong, uint, ushort, acc_t *, acc_t *);
void dumpmem(ctx_t *, ulong, ulong);

void decode(ctx_t *ctx);

void enable_stdin_echoing(void);
void disable_stdin_echoing(void);

extern void do_hlt(ctx_t *ctx);

#include <pc/mem.h>
#include <pc/sym.h>
#include <pc/regs.h>
#include <pc/decode.h>
#include <pc/except.h>
#include <ob/arch_i.h>

extern ctx_t main_ctx;
extern reg_t arch_r[NREGS];
extern instr_t arch_i[NINSTRS];

extern size_t rfs_current_idx;

#endif