Annotation of gforth/m68k.h, revision 1.3

1.1       anton       1: /*
1.3     ! anton       2:   $Id: m68k.h,v 1.2 1995/01/18 18:41:41 anton Exp $
1.1       anton       3:   Copyright 1992 by the ANSI figForth Development Group
                      4: 
                      5:   This is the machine-specific part for the 68000 and family
                      6: */
                      7: 
                      8: #include "32bit.h"
                      9: 
1.3     ! anton      10: #define FLUSH_ICACHE(addr,size)    cache_$clear()
1.2       anton      11: /* Clearing the whole cache is a bit drastic, but this is the only
                     12:    cache control available on the apollo.
                     13: */
1.3     ! anton      14: 
        !            15: #ifdef DIRECT_THREADED
1.2       anton      16: 
1.1       anton      17: /* PFA gives the parameter field address corresponding to a cfa */
                     18: #define PFA(cfa)       (((Cell *)cfa)+2)
                     19: /* PFA1 is a special version for use just after a NEXT1 */
                     20: #define PFA1(cfa)      PFA(cfa)
                     21: /* CODE_ADDRESS is the address of the code jumped to through the code field */
                     22: #define CODE_ADDRESS(cfa)      (*(Label *)(((char *)(cfa))+2))
                     23: /* MAKE_CF creates an appropriate code field at the cfa;
                     24:    ca is the code address */
                     25: #define MAKE_CF(cfa,ca)                ({short * _cfa = (short *)cfa; \
                     26:                                  _cfa[0] = 0x4ef9; /* jmp.l */ \
                     27:                                  *(long *)(_cfa+1) = (long)(ca);})
                     28: 
                     29: /* this is the point where the does code starts if label points to the
                     30:  * jump dodoes */
1.2       anton      31: #define DOES_CODE(label)       ((Xt *)(((char *)CODE_ADDRESS(label))+DOES_HANDLER_SIZE))
1.1       anton      32: 
                     33: /* this is a special version of DOES_CODE for use in dodoes */
                     34: #define DOES_CODE1(label)      DOES_CODE(label)
                     35: 
1.2       anton      36: /* this stores a call dodoes at addr */
                     37: #define MAKE_DOES_HANDLER(addr) MAKE_CF(addr,symbols[DODOES])
                     38: 
                     39: #define DOES_HANDLER_SIZE       8
                     40: 
                     41: #define MAKE_DOES_CF(addr,doesp)   MAKE_CF(addr,((int)(doesp)-8))
1.1       anton      42: #endif
                     43: 

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