/* Copyright (C) 2004  David Decotigny
    Copyright (C) 1999  Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
    as published by the Free Software Foundation; either version 2
    of the License, or (at your option) any later version.
    
    This program 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 General Public License for more details.
    
    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
    USA. 
 */
 #include <hwcore/ioports.h>
 #include <sos/klibc.h>
 
 #include "bochs.h"
 
 /* This is a special hack that is only useful when running the
    operating system under the Bochs emulator.  */
 #define SOS_BOCHS_IOPORT 0xe9
 
 sos_ret_t sos_bochs_setup(void)
 {
   return SOS_OK;
 }
 
 
 #define sos_bochs_putchar(chr) \
     outb((chr), SOS_BOCHS_IOPORT)
 
 sos_ret_t sos_bochs_putstring(const char* str)
 {
   for ( ; str && (*str != '\0') ; str++)
     sos_bochs_putchar(*str);
 
   return SOS_OK;
 }
 
 
 sos_ret_t sos_bochs_puthex(unsigned val, int nbytes)
 {
   unsigned c;
 
 #define BOCHS_PRTHEX(q) \
   ({ unsigned char r; if ((q) >= 10) r='a'+(q)-10; \
      else r='0'+(q); sos_bochs_putchar(r); })
 
   switch (nbytes)
     {
     case 4:
       c = (val >> 24) & 0xff;
       BOCHS_PRTHEX((c >> 4)&0xf);
       BOCHS_PRTHEX(c&0xf);
     case 3:
       c = (val >> 16) & 0xff;
       BOCHS_PRTHEX((c >> 4)&0xf);
       BOCHS_PRTHEX(c&0xf);
     case 2:
       c = (val >> 8) & 0xff;
       BOCHS_PRTHEX((c >> 4)&0xf);
       BOCHS_PRTHEX(c&0xf);
     case 1:
       c = val & 0xff;
       BOCHS_PRTHEX((c >> 4)&0xf);
       BOCHS_PRTHEX(c&0xf);
     }
 
   return SOS_OK;
 }
 
 
 sos_ret_t sos_bochs_hexdump(const void* addr, int nbytes)
 {
   int offs;
   for (offs = 0 ; offs < nbytes ; offs++)
     {
       const unsigned char *c;
       
       if ((offs % 16) == 0)
         {
           sos_bochs_putstring("0x");
           sos_bochs_puthex(offs, 4);
         }
       
       if ((offs % 8) == 0)
         sos_bochs_putstring("   ");
 
       c = (const unsigned char*)(addr + offs);
       sos_bochs_puthex(*c, 1);
       sos_bochs_putstring(" ");
       
       if (((offs + 1) % 16) == 0)
         sos_bochs_putstring("\n");
     }
 
   if (offs % 16)
     sos_bochs_putstring("\n");
 
   return SOS_OK;
 }
 
 
 sos_ret_t sos_bochs_printf(const char *format, /* args */...)
 {
   char buff[256];
   va_list ap;
   
   va_start(ap, format);
   vsnprintf(buff, sizeof(buff), format, ap);
   va_end(ap);
   
   return sos_bochs_putstring(buff);
 }