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: #define FLUSH_ICACHE(addr,size) cache_$clear()
25: /* Clearing the whole cache is a bit drastic, but this is the only
26: cache control available on the apollo.
27: */
28:
29: #ifdef DIRECT_THREADED
30: #warning untested
31: /* PFA gives the parameter field address corresponding to a cfa */
32: #define PFA(cfa) (((Cell *)cfa)+2)
33: /* PFA1 is a special version for use just after a NEXT1 */
34: #define PFA1(cfa) PFA(cfa)
35: /* CODE_ADDRESS is the address of the code jumped to through the code field */
36: #define CODE_ADDRESS(cfa) (*(Label *)(((char *)(cfa))+2))
37: /* MAKE_CF creates an appropriate code field at the cfa;
38: ca is the code address */
39: #define MAKE_CF(cfa,ca) ({short * _cfa = (short *)cfa; \
40: _cfa[0] = 0x4ef9; /* jmp.l */ \
41: *(long *)(_cfa+1) = (long)(ca);})
42:
43: /* this is the point where the does code for the word with the xt cfa
44: starts. */
45: #define DOES_CODE(cfa) \
46: ({ short *_cfa=(short *)(cfa); \
47: short *_ca;
48: ((_cfa[0] == 0x4ef9 \
49: && (_ca=CODE_ADDRESS(cfa), _ca[0] == 0x4ef9) \
50: && *(long *)(_cfa+1) == &&docol) \
51: ? ((unsigned)_ca)+DOES_HANDLER_SIZE \
52: : 0); })
53:
54: /* this is a special version of DOES_CODE for use in dodoes */
55: #define DOES_CODE1(cfa) ((Xt *)(((char *)CODE_ADDRESS(cfa))+DOES_HANDLER_SIZE))
56:
57: /* this stores a call dodoes at addr */
58: #define MAKE_DOES_HANDLER(addr) MAKE_CF(addr,symbols[DODOES])
59:
60: #define DOES_HANDLER_SIZE 8
61:
62: #define MAKE_DOES_CF(addr,doesp) MAKE_CF(addr,((int)(doesp)-8))
63: #endif
64:
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