Annotation of gforth/m68k.h, revision 1.7
1.4 anton 1: /* This is the machine-specific part for the 68000 and family
1.1 anton 2:
1.4 anton 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.
1.1 anton 20: */
21:
22: #include "32bit.h"
23:
1.2 anton 24: /* Clearing the whole cache is a bit drastic, but this is the only
1.7 ! pazsan 25: * cache control available on the apollo and NeXT
! 26: */
! 27: #if defined(apollo)
! 28: # define FLUSH_ICACHE(addr,size) cache_$clear()
! 29: #else
! 30: # if defined(NeXT)
! 31: # define FLUSH_ICACHE(addr,size) asm("trap #2");
! 32: # endif
! 33: #endif
1.3 anton 34:
35: #ifdef DIRECT_THREADED
1.5 anton 36: #warning untested
1.1 anton 37: /* PFA gives the parameter field address corresponding to a cfa */
38: #define PFA(cfa) (((Cell *)cfa)+2)
39: /* PFA1 is a special version for use just after a NEXT1 */
40: #define PFA1(cfa) PFA(cfa)
41: /* CODE_ADDRESS is the address of the code jumped to through the code field */
42: #define CODE_ADDRESS(cfa) (*(Label *)(((char *)(cfa))+2))
43: /* MAKE_CF creates an appropriate code field at the cfa;
44: ca is the code address */
45: #define MAKE_CF(cfa,ca) ({short * _cfa = (short *)cfa; \
46: _cfa[0] = 0x4ef9; /* jmp.l */ \
47: *(long *)(_cfa+1) = (long)(ca);})
48:
1.6 anton 49: /* this is the point where the does code for the word with the xt cfa
50: starts. */
51: #define DOES_CODE(cfa) \
52: ({ short *_cfa=(short *)(cfa); \
53: short *_ca;
54: ((_cfa[0] == 0x4ef9 \
55: && (_ca=CODE_ADDRESS(cfa), _ca[0] == 0x4ef9) \
56: && *(long *)(_cfa+1) == &&docol) \
57: ? ((unsigned)_ca)+DOES_HANDLER_SIZE \
58: : 0); })
1.1 anton 59:
60: /* this is a special version of DOES_CODE for use in dodoes */
1.6 anton 61: #define DOES_CODE1(cfa) ((Xt *)(((char *)CODE_ADDRESS(cfa))+DOES_HANDLER_SIZE))
1.1 anton 62:
1.2 anton 63: /* this stores a call dodoes at addr */
64: #define MAKE_DOES_HANDLER(addr) MAKE_CF(addr,symbols[DODOES])
65:
66: #define DOES_HANDLER_SIZE 8
67:
68: #define MAKE_DOES_CF(addr,doesp) MAKE_CF(addr,((int)(doesp)-8))
1.1 anton 69: #endif
70:
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