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/* This is the machine-specific part for the 68000 and family
Copyright (C) 1995 Free Software Foundation, Inc.
This file is part of Gforth.
Gforth 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "32bit.h"
/* Clearing the whole cache is a bit drastic, but this is the only
* cache control available on the apollo and NeXT
*/
#if defined(apollo)
# define FLUSH_ICACHE(addr,size) cache_$clear()
#elif defined(NeXT)
# define FLUSH_ICACHE(addr,size) asm("trap #2");
#elif defined(hpux)
# include <sys/cache.h>
# define FLUSH_ICACHE(addr,size) cachectl(CC_IPURGE,(addr),(size))
#else
# warning no FLUSH_ICACHE defined. If your machine has an I-cache (68020+),
# warning direct threading and CODE words will not work.
#endif
#ifdef DIRECT_THREADED
#warning untested
/* PFA gives the parameter field address corresponding to a cfa */
#define PFA(cfa) (((Cell *)cfa)+2)
/* PFA1 is a special version for use just after a NEXT1 */
#define PFA1(cfa) PFA(cfa)
/* CODE_ADDRESS is the address of the code jumped to through the code field */
#define CODE_ADDRESS(cfa) (*(Label *)(((char *)(cfa))+2))
/* MAKE_CF creates an appropriate code field at the cfa;
ca is the code address */
#define MAKE_CF(cfa,ca) ({short * _cfa = (short *)cfa; \
_cfa[0] = 0x4ef9; /* jmp.l */ \
*(long *)(_cfa+1) = (long)(ca);})
/* this is the point where the does code for the word with the xt cfa
starts. */
#define DOES_CODE(cfa) \
({ short *_cfa=(short *)(cfa); \
short *_ca; \
((_cfa[0] == 0x4ef9 \
&& (_ca=CODE_ADDRESS(cfa), _ca[0] == 0x4ef9) \
&& *(long *)(_cfa+1) == &&docol) \
? ((unsigned)_ca)+DOES_HANDLER_SIZE \
: 0); })
/* this is a special version of DOES_CODE for use in dodoes */
#define DOES_CODE1(cfa) ((Xt *)(((char *)CODE_ADDRESS(cfa))+DOES_HANDLER_SIZE))
/* this stores a call dodoes at addr */
#define MAKE_DOES_HANDLER(addr) MAKE_CF(addr,symbols[DODOES])
#define MAKE_DOES_CF(addr,doesp) MAKE_CF(addr,((int)(doesp)-8))
#endif
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