/////////////////////////////////////////////////////////////////////////
// $Id: bochs.h,v 1.127 2003/08/28 19:25:23 sshwarts Exp $
/////////////////////////////////////////////////////////////////////////
//
//  Copyright (C) 2002  MandrakeSoft S.A.
//
//    MandrakeSoft S.A.
//    43, rue d'Aboukir
//    75002 Paris - France
//    http://www.linux-mandrake.com/
//    http://www.mandrakesoft.com/
//
//  This library is free software; you can redistribute it and/or
//  modify it under the terms of the GNU Lesser General Public
//  License as published by the Free Software Foundation; either
//  version 2 of the License, or (at your option) any later version.
//
//  This library is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
//  Lesser General Public License for more details.
//
//  You should have received a copy of the GNU Lesser General Public
//  License along with this library; if not, write to the Free Software
//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA

//
// bochs.h is the master header file for all C++ code.  It includes all 
// the system header files needed by bochs, and also includes all the bochs
// C++ header files.  Because bochs.h and the files that it includes has 
// structure and class definitions, it cannot be called from C code.
// 

#ifndef BX_BOCHS_H
#  define BX_BOCHS_H 1

#include "config.h"      /* generated by configure script from config.h.in */

extern "C" {

#ifdef WIN32
// In a win32 compile (including cygwin), windows.h is required for several
// files in gui and iodev.  It is important to include it here in a header
// file so that WIN32-specific data types can be used in fields of classes.
#include <windows.h>
#endif

#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <errno.h>

#ifndef WIN32
#  include <unistd.h>
#else
#  include <io.h>
#endif
#include <time.h>
#if BX_WITH_MACOS
#  include <types.h>
#  include <stat.h>
#  include <cstdio>
#  include <unistd.h>
#elif BX_WITH_CARBON
#  include <sys/types.h>
#  include <sys/stat.h>
#  include <sys/param.h> /* for MAXPATHLEN */
#  include <utime.h>
#else
#  ifndef WIN32
#    include <sys/time.h>
#  endif
#  include <sys/types.h>
#  include <sys/stat.h>
#endif
#include <ctype.h>
#include <string.h>
#include <fcntl.h>
#include <limits.h>
#ifdef macintosh
#  define SuperDrive "[fd:]"
#endif
}

#include "osdep.h"       /* platform dependent includes and defines */ 
#include "debug/debug.h"
#include "bxversion.h"

#include "gui/siminterface.h"

// prototypes
int bx_begin_simulation (int argc, char *argv[]);

//
// some macros to interface the CPU and memory to external environment
// so that these functions can be redirected to the debugger when
// needed.
//

#if ((BX_DEBUGGER == 1) && (BX_NUM_SIMULATORS >= 2))
// =-=-=-=-=-=-=- Redirected to cosimulation debugger -=-=-=-=-=-=-=
#define DEV_vga_mem_read(addr)       bx_dbg_ucmem_read(addr)
#define DEV_vga_mem_write(addr, val) bx_dbg_ucmem_write(addr, val)

#if BX_SUPPORT_A20
#  define A20ADDR(x)               ( (x) & bx_pc_system.a20_mask )
#else
#  define A20ADDR(x)                (x)
#endif
#define BX_INP(addr, len)           bx_dbg_inp(addr, len)
#define BX_OUTP(addr, val, len)     bx_dbg_outp(addr, val, len)
#define BX_HRQ                      (bx_pc_system.HRQ)
#define BX_RAISE_HLDA()             bx_dbg_raise_HLDA()
#define BX_TICK1()
#define BX_INTR                     bx_pc_system.INTR
#define BX_SET_INTR(b)              bx_dbg_set_INTR(b)
#if BX_SIM_ID == 0
#  define BX_CPU_C                  bx_cpu0_c
#  define BX_CPU                    bx_cpu0
#  define BX_MEM_C                  bx_mem0_c
#  define BX_MEM                    bx_mem0
#else
#  define BX_CPU_C                  bx_cpu1_c
#  define BX_CPU                    bx_cpu1
#  define BX_MEM_C                  bx_mem1_c
#  define BX_MEM                    bx_mem1
#endif
#define BX_SET_ENABLE_A20(enabled)  bx_dbg_async_pin_request(BX_DBG_ASYNC_PENDING_A20, \
                                      enabled)
#define BX_GET_ENABLE_A20()         bx_pc_system.get_enable_a20()
#error FIXME: cosim mode not fixed yet

#else

// =-=-=-=-=-=-=- Normal optimized use -=-=-=-=-=-=-=-=-=-=-=-=-=-=
#if BX_SUPPORT_A20
#  define A20ADDR(x)               ( (x) & bx_pc_system.a20_mask )
#else
#  define A20ADDR(x)               (x)
#endif
//
// some pc_systems functions just redirect to the IO devices so optimize
// by eliminating call here
//
// #define BX_INP(addr, len)        bx_pc_system.inp(addr, len)
// #define BX_OUTP(addr, val, len)  bx_pc_system.outp(addr, val, len)
#define BX_INP(addr, len)           bx_devices.inp(addr, len)
#define BX_OUTP(addr, val, len)     bx_devices.outp(addr, val, len)
#define BX_TICK1()                  bx_pc_system.tick1()
#define BX_TICKN(n)                 bx_pc_system.tickn(n)
#define BX_INTR                     bx_pc_system.INTR
#define BX_SET_INTR(b)              bx_pc_system.set_INTR(b)
#define BX_CPU_C                    bx_cpu_c
#define BX_MEM_C                    bx_mem_c
#define BX_HRQ                      (bx_pc_system.HRQ)
#define BX_MEM_READ_PHYSICAL(phy_addr, len, ptr) \
  BX_MEM(0)->readPhysicalPage(BX_CPU(0), phy_addr, len, ptr)
#define BX_MEM_WRITE_PHYSICAL(addr, len, ptr) \
  BX_MEM(0)->writePhysicalPage(BX_CPU(0), phy_addr, len, ptr)

#if BX_SMP_PROCESSORS==1
#define BX_CPU(x)                   (&bx_cpu)
#define BX_MEM(x)                   (&bx_mem)
#else
#define BX_CPU(x)                   (bx_cpu_array[x])
#define BX_MEM(x)                   (bx_mem_array[x])
#endif

#define BX_SET_ENABLE_A20(enabled)  bx_pc_system.set_enable_a20(enabled)
#define BX_GET_ENABLE_A20()         bx_pc_system.get_enable_a20()

#endif


// you can't use static member functions on the CPU, if there are going
// to be 2 cpus.  Check this early on.
#if (BX_SMP_PROCESSORS>1)
#  if (BX_USE_CPU_SMF!=0)
#    error For SMP simulation, BX_USE_CPU_SMF must be 0.
#  endif
#endif


// #define BX_IAC()                 bx_pc_system.IAC()
//#define BX_IAC()                    bx_dbg_IAC()

//
// Ways for the the external environment to report back information
// to the debugger.
//

#if BX_DEBUGGER
#  define BX_DBG_ASYNC_INTR bx_guard.async.irq
#  define BX_DBG_ASYNC_DMA  bx_guard.async.dma
#if (BX_NUM_SIMULATORS > 1)
// for multiple simulators, we always need this info, since we're
// going to replay it.
#  define BX_DBG_DMA_REPORT(addr, len, what, val) \
        bx_dbg_dma_report(addr, len, what, val)
#  define BX_DBG_IAC_REPORT(vector, irq) \
        bx_dbg_iac_report(vector, irq)
#  define BX_DBG_A20_REPORT(val) \
        bx_dbg_a20_report(val)
#  define BX_DBG_IO_REPORT(addr, size, op, val) \
        bx_dbg_io_report(addr, size, op, val)
#  define BX_DBG_UCMEM_REPORT(addr, size, op, val)
#else
// for a single simulator debug environment, we can optimize a little
// by conditionally calling, as per requested.

#  define BX_DBG_DMA_REPORT(addr, len, what, val) \
        if (bx_guard.report.dma) bx_dbg_dma_report(addr, len, what, val)
#  define BX_DBG_IAC_REPORT(vector, irq) \
        if (bx_guard.report.irq) bx_dbg_iac_report(vector, irq)
#  define BX_DBG_A20_REPORT(val) \
        if (bx_guard.report.a20) bx_dbg_a20_report(val)
#  define BX_DBG_IO_REPORT(addr, size, op, val) \
        if (bx_guard.report.io) bx_dbg_io_report(addr, size, op, val)
#  define BX_DBG_UCMEM_REPORT(addr, size, op, val) \
        if (bx_guard.report.ucmem) bx_dbg_ucmem_report(addr, size, op, val)
#endif  // #if (BX_NUM_SIMULATORS > 1)

#else  // #if BX_DEBUGGER
// debugger not compiled in, use empty stubs
#  define BX_DBG_ASYNC_INTR 1
#  define BX_DBG_ASYNC_DMA  1
#  define BX_DBG_DMA_REPORT(addr, len, what, val)
#  define BX_DBG_IAC_REPORT(vector, irq)
#  define BX_DBG_A20_REPORT(val)
#  define BX_DBG_IO_REPORT(addr, size, op, val)
#  define BX_DBG_UCMEM_REPORT(addr, size, op, val)
#endif  // #if BX_DEBUGGER

#define MAGIC_LOGNUM 0x12345678

typedef class BOCHSAPI logfunctions {
	char *prefix;
	int type;
// values of onoff: 0=ignore, 1=report, 2=ask, 3=fatal
#define ACT_IGNORE 0
#define ACT_REPORT 1
#define ACT_ASK    2
#define ACT_FATAL  3
#define N_ACT      4
	int onoff[N_LOGLEV];
	class iofunctions *logio;
	// default log actions for all devices, declared and initialized
	// in logio.cc.
	BOCHSAPI_CYGONLY static int default_onoff[N_LOGLEV];
public:
	logfunctions(void);
	logfunctions(class iofunctions *);
	~logfunctions(void);

	void info(const char *fmt, ...)   BX_CPP_AttrPrintf(2, 3);
	void error(const char *fmt, ...)  BX_CPP_AttrPrintf(2, 3);
	void panic(const char *fmt, ...)  BX_CPP_AttrPrintf(2, 3);
	void pass(const char *fmt, ...)   BX_CPP_AttrPrintf(2, 3);
	void ldebug(const char *fmt, ...) BX_CPP_AttrPrintf(2, 3);
	void fatal (const char *prefix, const char *fmt, va_list ap, int exit_status);
#if BX_EXTERNAL_DEBUGGER
	virtual void ask (int level, const char *prefix, const char *fmt, va_list ap);
#else
	void ask (int level, const char *prefix, const char *fmt, va_list ap);
#endif
	void put(char *);
	void settype(int);
	void setio(class iofunctions *);
	void setonoff(int loglev, int value) {
	  assert (loglev >= 0 && loglev < N_LOGLEV);
	  onoff[loglev] = value; 
	}
	char *getprefix () { return prefix; }
	int getonoff(int level) {
	  assert (level>=0 && level<N_LOGLEV);
	  return onoff[level]; 
        }
	static void set_default_action (int loglev, int action) {
	  assert (loglev >= 0 && loglev < N_LOGLEV);
	  assert (action >= 0 && action < N_ACT);
	  default_onoff[loglev] = action;
	}
	static int get_default_action (int loglev) {
	  assert (loglev >= 0 && loglev < N_LOGLEV);
	  return default_onoff[loglev];
	}
} logfunc_t;

#define BX_LOGPREFIX_SIZE 51

enum {
  IOLOG=0, FDLOG, GENLOG, CMOSLOG, CDLOG, DMALOG, ETHLOG, G2HLOG, HDLOG, KBDLOG,
  NE2KLOG, PARLOG, PCILOG, PICLOG, PITLOG, SB16LOG, SERLOG, VGALOG,
  STLOG, // state_file.cc 
  DEVLOG, MEMLOG, DISLOG, GUILOG, IOAPICLOG, APICLOG, CPU0LOG, CPU1LOG,
  CPU2LOG, CPU3LOG, CPU4LOG, CPU5LOG, CPU6LOG, CPU7LOG, CPU8LOG, CPU9LOG,
  CPU10LOG, CPU11LOG, CPU12LOG, CPU13LOG, CPU14LOG, CPU15LOG, CTRLLOG,
  UNMAPLOG, SERRLOG, BIOSLOG, PIT81LOG, PIT82LOG, IODEBUGLOG, PCI2ISALOG,
  PLUGINLOG, EXTFPUIRQLOG , PCIVGALOG, PCIUSBLOG, VTIMERLOG, STIMERLOG
};

class BOCHSAPI iofunctions {
	int magic;
	char logprefix[BX_LOGPREFIX_SIZE];
	FILE *logfd;
	class logfunctions *log;
	void init(void);
	void flush(void);

// Log Class types
public:
	iofunctions(void);
	iofunctions(FILE *);
	iofunctions(int);
	iofunctions(const char *);
	~iofunctions(void);

	void out(int facility, int level, const char *pre, const char *fmt, va_list ap);

	void init_log(const char *fn);
	void init_log(int fd);
	void init_log(FILE *fs);
	void set_log_prefix(const char *prefix);
	int get_n_logfns () { return n_logfn; }
	logfunc_t *get_logfn (int index) { return logfn_list[index]; }
	void add_logfn (logfunc_t *fn);
	void set_log_action (int loglevel, int action);
	const char *getlevel(int i) {
		static const char *loglevel[N_LOGLEV] = {
			"DEBUG",
			"INFO",
			"ERROR",
			"PANIC",
			"PASS"
		};
                if (i>=0 && i<N_LOGLEV) return loglevel[i];
                else return "?";
	}
	char *getaction(int i) {
	   static char *name[] = { "ignore", "report", "ask", "fatal" };
	   assert (i>=ACT_IGNORE && i<N_ACT);
	   return name[i];
	}

protected:
	int n_logfn;
#define MAX_LOGFNS 128
	logfunc_t *logfn_list[MAX_LOGFNS];
	char *logfn;


};

typedef class BOCHSAPI iofunctions iofunc_t;


#define SAFE_GET_IOFUNC() \
  ((io==NULL)? (io=new iofunc_t("/dev/stderr")) : io)
#define SAFE_GET_GENLOG() \
  ((genlog==NULL)? (genlog=new logfunc_t(SAFE_GET_IOFUNC())) : genlog)
/* #define NO_LOGGING */
#ifndef NO_LOGGING

#define BX_INFO(x)  (LOG_THIS info) x
#define BX_DEBUG(x) (LOG_THIS ldebug) x
#define BX_ERROR(x) (LOG_THIS error) x
#define BX_PANIC(x) (LOG_THIS panic) x
#define BX_PASS(x) (LOG_THIS pass) x

#else

#define EMPTY do { } while(0)

#define BX_INFO(x)  EMPTY
#define BX_DEBUG(x) EMPTY
#define BX_ERROR(x) EMPTY
#define BX_PANIC(x) (LOG_THIS panic) x
#define BX_PASS(x) (LOG_THIS pass) x

#endif

BOCHSAPI extern iofunc_t *io;
BOCHSAPI extern logfunc_t *genlog;

#include "state_file.h"

#ifndef UNUSED
#  define UNUSED(x) ((void)x)
#endif

#define uint8   Bit8u
#define uint16  Bit16u
#define uint32  Bit32u


#if BX_PROVIDE_CPU_MEMORY==1
#  include "cpu/cpu.h"
#endif

#if BX_EXTERNAL_DEBUGGER
#  include "cpu/extdb.h"
#endif

#if BX_GDBSTUB
// defines for GDB stub
void bx_gdbstub_init(int argc, char* argv[]);
int bx_gdbstub_check(unsigned int eip);
#define GDBSTUB_STOP_NO_REASON   (0xac0)

#if BX_SMP_PROCESSORS!=1
#error GDB stub was written for single processor support.  If multiprocessor support is added, then we can remove this check.
// The big problem is knowing which CPU gdb is referring to.  In other words,
// what should we put for "n" in BX_CPU(n)->dbg_xlate_linear2phy() and
// BX_CPU(n)->dword.eip, etc.
#endif

#endif

#if BX_DISASM
#  include "disasm/disasm.h"
#endif

typedef struct {
  bx_bool floppy;
  bx_bool keyboard;
  bx_bool video;
  bx_bool disk;
  bx_bool pit;
  bx_bool pic;
  bx_bool bios;
  bx_bool cmos;
  bx_bool a20;
  bx_bool interrupts;
  bx_bool exceptions;
  bx_bool unsupported;
  bx_bool temp;
  bx_bool reset;
  bx_bool debugger;
  bx_bool mouse;
  bx_bool io;
  bx_bool xms;
  bx_bool v8086;
  bx_bool paging;
  bx_bool creg;
  bx_bool dreg;
  bx_bool dma;
  bx_bool unsupported_io;
  bx_bool serial;
  bx_bool cdrom;
#ifdef MAGIC_BREAKPOINT
  bx_bool magic_break_enabled;
#endif /* MAGIC_BREAKPOINT */
#if BX_SUPPORT_APIC
  bx_bool apic;
  bx_bool ioapic;
#endif
#if BX_DEBUG_LINUX
  bx_bool linux_syscall;
#endif
  void* record_io;
  } bx_debug_t;

#define BX_ASSERT(x) do {if (!(x)) BX_PANIC(("failed assertion \"%s\" at %s:%d\n", #x, __FILE__, __LINE__));} while (0)
void bx_signal_handler (int signum);
int bx_atexit(void);
BOCHSAPI extern bx_debug_t bx_dbg;



/* Already in gui/siminterface.h ??? 
#define BX_FLOPPY_NONE   10 // floppy not present
#define BX_FLOPPY_1_2    11 // 1.2M  5.25"
#define BX_FLOPPY_1_44   12 // 1.44M 3.5"
#define BX_FLOPPY_2_88   13 // 2.88M 3.5"
#define BX_FLOPPY_720K   14 // 720K  3.5"
#define BX_FLOPPY_360K   15 // 360K  5.25"
#define BX_FLOPPY_LAST   15 // last one
*/


#define BX_READ    0
#define BX_WRITE   1
#define BX_RW      2





#include "memory/memory.h"


enum PCS_OP { PCS_CLEAR, PCS_SET, PCS_TOGGLE };

#include "pc_system.h"
#include "plugin.h"
#include "gui/gui.h"
#include "gui/textconfig.h"
#include "gui/keymap.h"
#include "iodev/iodev.h"







/* --- EXTERNS --- */

#if ( BX_PROVIDE_DEVICE_MODELS==1 )
BOCHSAPI extern bx_devices_c   bx_devices;
#endif

#if BX_GUI_SIGHANDLER
extern bx_bool bx_gui_sighandler;
#endif

// This value controls how often each I/O device's periodic() method
// gets called.  The timer is set up in iodev/devices.cc.
#define BX_IODEV_HANDLER_PERIOD 100    // microseconds
//#define BX_IODEV_HANDLER_PERIOD 10    // microseconds

char *bx_find_bochsrc (void);
int bx_parse_cmdline (int arg, int argc, char *argv[]);
int bx_read_configuration (char *rcfile);
int bx_write_configuration (char *rcfile, int overwrite);
void bx_reset_options (void);

#define BX_PATHNAME_LEN 512

typedef struct {
  bx_param_bool_c *Opresent;
  bx_param_num_c *Oioaddr1;
  bx_param_num_c *Oioaddr2;
  bx_param_num_c *Oirq;
  } bx_ata_options;

typedef struct {
  bx_param_string_c *Opath;
  bx_param_num_c *Oaddress;
  } bx_rom_options;

typedef struct {
  bx_param_string_c *Opath;
  } bx_vgarom_options;

typedef struct {
  bx_param_num_c *Osize;
  } bx_mem_options;

typedef struct {
  bx_param_bool_c *Oenabled;
  bx_param_string_c *Ooutfile;
} bx_parport_options;

typedef struct {
  bx_param_string_c *Opath;
  bx_param_bool_c *OcmosImage;
  } bx_cmos_options;

typedef struct {
  bx_param_num_c   *Otime0;
  bx_param_enum_c  *Osync;
  } bx_clock_options;

typedef struct {
  bx_param_bool_c *Opresent;
  bx_param_num_c *Oioaddr;
  bx_param_num_c *Oirq;
  bx_param_string_c *Omacaddr;
  bx_param_enum_c *Oethmod;
  bx_param_string_c *Oethdev;
  bx_param_string_c *Oscript;
  } bx_ne2k_options;

typedef struct {
// These options are used for a special hack to load a
// 32bit OS directly into memory, so it can be run without
// any of the 16bit real mode or BIOS assistance.  This
// is for the development of plex86, so we don't have
// to implement real mode up front.
  bx_param_num_c *OwhichOS;
  bx_param_string_c *Opath;
  bx_param_string_c *Oiolog;
  bx_param_string_c *Oinitrd;
  } bx_load32bitOSImage_t;

typedef struct {
  bx_param_string_c *Ofilename;
  bx_param_string_c *Oprefix;
  bx_param_string_c *Odebugger_filename;
} bx_log_options;

typedef struct {
  bx_param_bool_c *Opresent;
  bx_param_string_c *Omidifile;
  bx_param_string_c *Owavefile;
  bx_param_string_c *Ologfile;
  bx_param_num_c *Omidimode;
  bx_param_num_c *Owavemode;
  bx_param_num_c *Ologlevel;
  bx_param_num_c *Odmatimer;
  } bx_sb16_options;

typedef struct {
  unsigned int port;
  unsigned int text_base;
  unsigned int data_base;
  unsigned int bss_base;
  } bx_gdbstub_t;

typedef struct {
  bx_param_bool_c *OuseMapping;
  bx_param_string_c *Okeymap;
  } bx_keyboard_options;

#define BX_KBD_XT_TYPE        0
#define BX_KBD_AT_TYPE        1
#define BX_KBD_MF_TYPE        2 

#define BX_N_OPTROM_IMAGES 4
#define BX_N_SERIAL_PORTS 1
#define BX_N_PARALLEL_PORTS 1
#define BX_N_USB_HUBS 1

typedef struct BOCHSAPI {
  bx_floppy_options floppya;
  bx_floppy_options floppyb;
  bx_ata_options    ata[BX_MAX_ATA_CHANNEL];
  bx_atadevice_options  atadevice[BX_MAX_ATA_CHANNEL][2];
  // bx_disk_options   diskc;
  // bx_disk_options   diskd;
  // bx_cdrom_options  cdromd; 
  bx_serial_options com[BX_N_SERIAL_PORTS];
  bx_usb_options    usb[BX_N_USB_HUBS];
  bx_rom_options    rom;
  bx_vgarom_options vgarom;
  bx_rom_options    optrom[BX_N_OPTROM_IMAGES]; // Optional rom images 
  bx_mem_options    memory;
  bx_parport_options par[BX_N_PARALLEL_PORTS]; // parallel ports
  bx_sb16_options   sb16;
  bx_param_num_c    *Obootdrive;  
  bx_param_bool_c   *OfloppySigCheck;
  bx_param_num_c    *Ovga_update_interval;
  bx_param_num_c    *Okeyboard_serial_delay;
  bx_param_num_c    *Okeyboard_paste_delay;
  bx_param_enum_c   *Okeyboard_type;
  bx_param_num_c    *Ofloppy_command_delay;
  bx_param_num_c    *Oips;
  bx_param_bool_c   *Orealtime_pit;
  bx_param_bool_c   *Otext_snapshot_check;
  bx_param_bool_c   *Omouse_enabled;
  bx_param_bool_c   *Oprivate_colormap;
#if BX_WITH_AMIGAOS
  bx_param_bool_c   *Ofullscreen;
  bx_param_string_c *Oscreenmode;
#endif
  bx_param_bool_c   *Oi440FXSupport;
  bx_cmos_options   cmos;
  bx_clock_options  clock;
  bx_ne2k_options   ne2k;
  bx_param_bool_c   *OnewHardDriveSupport;
  bx_load32bitOSImage_t load32bitOSImage;
  bx_log_options    log;
  bx_keyboard_options keyboard;
  bx_param_string_c *Ouser_shortcut;
  bx_gdbstub_t      gdbstub;
  bx_param_enum_c *Osel_config;
  bx_param_enum_c *Osel_displaylib;
  } bx_options_t;

BOCHSAPI extern bx_options_t bx_options;

void bx_center_print (FILE *file, char *line, int maxwidth);

#if BX_PROVIDE_CPU_MEMORY==1
#else
// #  include "external_interface.h"
#endif

#define BX_USE_PS2_MOUSE 1

int bx_init_hardware ();

#include "instrument.h"


// These are some convenience macros which abstract out accesses between
// a variable in native byte ordering to/from guest (x86) memory, which is
// always in little endian format.  You must deal with alignment (if your
// system cares) and endian rearranging.  Don't assume anything.  You could
// put some platform specific asm() statements here, to make use of native
// instructions to help perform these operations more efficiently than C++.


#ifdef __i386__

#define WriteHostWordToLittleEndian(hostPtr,  nativeVar16) \
    *((Bit16u*)(hostPtr)) = (nativeVar16)
#define WriteHostDWordToLittleEndian(hostPtr, nativeVar32) \
    *((Bit32u*)(hostPtr)) = (nativeVar32)
#define WriteHostQWordToLittleEndian(hostPtr, nativeVar64) \
    *((Bit64u*)(hostPtr)) = (nativeVar64)
#define ReadHostWordFromLittleEndian(hostPtr, nativeVar16) \
    (nativeVar16) = *((Bit16u*)(hostPtr))
#define ReadHostDWordFromLittleEndian(hostPtr, nativeVar32) \
    (nativeVar32) = *((Bit32u*)(hostPtr))
#define ReadHostQWordFromLittleEndian(hostPtr, nativeVar64) \
    (nativeVar64) = *((Bit64u*)(hostPtr))

#else

#define WriteHostWordToLittleEndian(hostPtr,  nativeVar16) { \
    ((Bit8u *)(hostPtr))[0] = (Bit8u)  (nativeVar16); \
    ((Bit8u *)(hostPtr))[1] = (Bit8u) ((nativeVar16)>>8); \
    }
#define WriteHostDWordToLittleEndian(hostPtr, nativeVar32) { \
    ((Bit8u *)(hostPtr))[0] = (Bit8u)  (nativeVar32); \
    ((Bit8u *)(hostPtr))[1] = (Bit8u) ((nativeVar32)>>8); \
    ((Bit8u *)(hostPtr))[2] = (Bit8u) ((nativeVar32)>>16); \
    ((Bit8u *)(hostPtr))[3] = (Bit8u) ((nativeVar32)>>24); \
    }
#define WriteHostQWordToLittleEndian(hostPtr, nativeVar64) { \
    ((Bit8u *)(hostPtr))[0] = (Bit8u)  (nativeVar64); \
    ((Bit8u *)(hostPtr))[1] = (Bit8u) ((nativeVar64)>>8); \
    ((Bit8u *)(hostPtr))[2] = (Bit8u) ((nativeVar64)>>16); \
    ((Bit8u *)(hostPtr))[3] = (Bit8u) ((nativeVar64)>>24); \
    ((Bit8u *)(hostPtr))[4] = (Bit8u) ((nativeVar64)>>32); \
    ((Bit8u *)(hostPtr))[5] = (Bit8u) ((nativeVar64)>>40); \
    ((Bit8u *)(hostPtr))[6] = (Bit8u) ((nativeVar64)>>48); \
    ((Bit8u *)(hostPtr))[7] = (Bit8u) ((nativeVar64)>>56); \
    }
#define ReadHostWordFromLittleEndian(hostPtr, nativeVar16) { \
    (nativeVar16) =  ((Bit16u) ((Bit8u *)(hostPtr))[0]) | \
                    (((Bit16u) ((Bit8u *)(hostPtr))[1])<<8) ; \
    }
#define ReadHostDWordFromLittleEndian(hostPtr, nativeVar32) { \
    (nativeVar32) =  ((Bit32u) ((Bit8u *)(hostPtr))[0]) | \
                    (((Bit32u) ((Bit8u *)(hostPtr))[1])<<8) | \
                    (((Bit32u) ((Bit8u *)(hostPtr))[2])<<16) | \
                    (((Bit32u) ((Bit8u *)(hostPtr))[3])<<24); \
    }
#define ReadHostQWordFromLittleEndian(hostPtr, nativeVar64) { \
    (nativeVar64) =  ((Bit64u) ((Bit8u *)(hostPtr))[0]) | \
                    (((Bit64u) ((Bit8u *)(hostPtr))[1])<<8) | \
                    (((Bit64u) ((Bit8u *)(hostPtr))[2])<<16) | \
                    (((Bit64u) ((Bit8u *)(hostPtr))[3])<<24) | \
                    (((Bit64u) ((Bit8u *)(hostPtr))[4])<<32) | \
                    (((Bit64u) ((Bit8u *)(hostPtr))[5])<<40) | \
                    (((Bit64u) ((Bit8u *)(hostPtr))[6])<<48) | \
                    (((Bit64u) ((Bit8u *)(hostPtr))[7])<<56); \
    }

#endif

#endif  /* BX_BOCHS_H */
