File:
[gforth] /
gforth /
Attic /
m68k.h
Revision
1.8:
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Tue Mar 4 17:49:51 1997 UTC (27 years, 1 month ago) by
anton
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MAIN
CVS tags:
v0-3-0,
HEAD
added double indirect threaded version and making of fully relocatable images.
added gforth-makeimage script for making fully relocatable images.
removed locals bug in if else endif constructs.
added mmap support for machines without MAP_ANON
removed command-line options -c and -o
moved definition of DOES_HANDLER_SIZE from machine.h to forth.h.
added hpux FLUSH_ICACHE in m68k.h
made source words print decimal
1: /* This is the machine-specific part for the 68000 and family
2:
3: Copyright (C) 1995 Free Software Foundation, Inc.
4:
5: This file is part of Gforth.
6:
7: Gforth is free software; you can redistribute it and/or
8: modify it under the terms of the GNU General Public License
9: as published by the Free Software Foundation; either version 2
10: of the License, or (at your option) any later version.
11:
12: This program is distributed in the hope that it will be useful,
13: but WITHOUT ANY WARRANTY; without even the implied warranty of
14: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15: GNU General Public License for more details.
16:
17: You should have received a copy of the GNU General Public License
18: along with this program; if not, write to the Free Software
19: Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20: */
21:
22: #include "32bit.h"
23:
24: /* Clearing the whole cache is a bit drastic, but this is the only
25: * cache control available on the apollo and NeXT
26: */
27: #if defined(apollo)
28: # define FLUSH_ICACHE(addr,size) cache_$clear()
29: #elif defined(NeXT)
30: # define FLUSH_ICACHE(addr,size) asm("trap #2");
31: #elif defined(hpux)
32: # include <sys/cache.h>
33: # define FLUSH_ICACHE(addr,size) cachectl(CC_IPURGE,(addr),(size))
34: #else
35: # warning no FLUSH_ICACHE defined. If your machine has an I-cache (68020+),
36: # warning direct threading and CODE words will not work.
37: #endif
38:
39: #ifdef DIRECT_THREADED
40: #warning untested
41: /* PFA gives the parameter field address corresponding to a cfa */
42: #define PFA(cfa) (((Cell *)cfa)+2)
43: /* PFA1 is a special version for use just after a NEXT1 */
44: #define PFA1(cfa) PFA(cfa)
45: /* CODE_ADDRESS is the address of the code jumped to through the code field */
46: #define CODE_ADDRESS(cfa) (*(Label *)(((char *)(cfa))+2))
47: /* MAKE_CF creates an appropriate code field at the cfa;
48: ca is the code address */
49: #define MAKE_CF(cfa,ca) ({short * _cfa = (short *)cfa; \
50: _cfa[0] = 0x4ef9; /* jmp.l */ \
51: *(long *)(_cfa+1) = (long)(ca);})
52:
53: /* this is the point where the does code for the word with the xt cfa
54: starts. */
55: #define DOES_CODE(cfa) \
56: ({ short *_cfa=(short *)(cfa); \
57: short *_ca; \
58: ((_cfa[0] == 0x4ef9 \
59: && (_ca=CODE_ADDRESS(cfa), _ca[0] == 0x4ef9) \
60: && *(long *)(_cfa+1) == &&docol) \
61: ? ((unsigned)_ca)+DOES_HANDLER_SIZE \
62: : 0); })
63:
64: /* this is a special version of DOES_CODE for use in dodoes */
65: #define DOES_CODE1(cfa) ((Xt *)(((char *)CODE_ADDRESS(cfa))+DOES_HANDLER_SIZE))
66:
67: /* this stores a call dodoes at addr */
68: #define MAKE_DOES_HANDLER(addr) MAKE_CF(addr,symbols[DODOES])
69:
70: #define MAKE_DOES_CF(addr,doesp) MAKE_CF(addr,((int)(doesp)-8))
71: #endif
72:
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