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| 1 : | anton | 1.12 | /* This is the machine-specific part for a SPARC |
| 2 : | anton | 1.1 | |
| 3 : | anton | 1.12 | 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 : | anton | 1.1 | */ |
| 21 : | anton | 1.5 | |
| 22 : | #include "32bit.h" | ||
| 23 : | anton | 1.4 | |
| 24 : | #if !defined(USE_TOS) && !defined(USE_NO_TOS) | ||
| 25 : | #define USE_TOS | ||
| 26 : | #endif | ||
| 27 : | anton | 1.1 | |
| 28 : | anton | 1.9 | #if !defined(INDIRECT_THREADED) && !defined(DIRECT_THREADED) |
| 29 : | #define DIRECT_THREADED | ||
| 30 : | #endif | ||
| 31 : | anton | 1.1 | |
| 32 : | anton | 1.11 | #define FLUSH_ICACHE(addr,size) \ |
| 33 : | anton | 1.13 | ({void *_addr=(addr); void *_end=_addr+((Cell)(size)); \ |
| 34 : | anton | 1.11 | for (_addr=((long)_addr)&~7; _addr<_end; _addr += 8) \ |
| 35 : | anton | 1.15 | asm("iflush %0+0"::"r"(_addr)); \ |
| 36 : | anton | 1.11 | }) |
| 37 : | anton | 1.15 | /* the +0 in the iflush instruction is needed by gas */ |
| 38 : | anton | 1.11 | |
| 39 : | anton | 1.1 | #ifdef DIRECT_THREADED |
| 40 : | anton | 1.7 | #ifndef WORDS_BIGENDIAN |
| 41 : | anton | 1.10 | #error Direct threading only supported for big-endian SPARCs. |
| 42 : | anton | 1.7 | /* little endian SPARCs still store instructions in big-endian format, |
| 43 : | so you would have to reverse the instructions stores in the following | ||
| 44 : | */ | ||
| 45 : | #endif | ||
| 46 : | |||
| 47 : | anton | 1.1 | /* PFA gives the parameter field address corresponding to a cfa */ |
| 48 : | #define PFA(cfa) (((Cell *)cfa)+2) | ||
| 49 : | /* PFA1 is a special version for use just after a NEXT1 */ | ||
| 50 : | /* the improvement here is that we may destroy cfa before using PFA1 */ | ||
| 51 : | anton | 1.6 | #define PFA1(cfa) PFA(cfa) |
| 52 : | #ifdef undefined | ||
| 53 : | anton | 1.1 | #define PFA1(cfa) /* PFA(cfa) */ \ |
| 54 : | anton | 1.6 | ({register Cell *pfa asm("%o7"); \ |
| 55 : | anton | 1.1 | pfa+2; }) |
| 56 : | anton | 1.6 | #endif |
| 57 : | anton | 1.1 | /* CODE_ADDRESS is the address of the code jumped to through the code field */ |
| 58 : | anton | 1.6 | #define CODE_ADDRESS(cfa) ({unsigned _cfa = (unsigned)(cfa); \ |
| 59 : | anton | 1.14 | (Label)(_cfa+((*(unsigned *)_cfa)<<2)-4);}) |
| 60 : | anton | 1.1 | /* MAKE_CF creates an appropriate code field at the cfa; ca is the code address */ |
| 61 : | /* we use call, since 'branch always' only has 22 bits displacement */ | ||
| 62 : | #define MAKE_CF(cfa,ca) ({long *_cfa = (long *)(cfa); \ | ||
| 63 : | unsigned _ca = (unsigned)(ca); \ | ||
| 64 : | anton | 1.6 | _cfa[0] = 0x40000000|((_ca+4-(unsigned)_cfa)>>2); /* CALL ca */ \ |
| 65 : | anton | 1.1 | _cfa[1] = *(long *)_ca; /* delay slot */}) |
| 66 : | |||
| 67 : | /* this is the point where the does code starts if label points to the | ||
| 68 : | * jump dodoes */ | ||
| 69 : | anton | 1.14 | /* the +4 is due to the fact, that the does_cf jumps directly to the |
| 70 : | code address, whereas CODE_ADDRESS expects a jump to | ||
| 71 : | code_address+4, and corrects for that (which is countercorrected by | ||
| 72 : | the +4) */ | ||
| 73 : | #define DOES_CODE(label) ((Xt *)(CODE_ADDRESS(label)+4+DOES_HANDLER_SIZE)) | ||
| 74 : | anton | 1.1 | |
| 75 : | /* this is a special version of DOES_CODE for use in dodoes */ | ||
| 76 : | anton | 1.6 | #define DOES_CODE1(label) DOES_CODE(label) |
| 77 : | #ifdef undefined | ||
| 78 : | #define DOES_CODE1(label) ({register Xt *_does_code asm("%o7"); \ | ||
| 79 : | anton | 1.1 | _does_code+2; }) |
| 80 : | anton | 1.6 | #endif |
| 81 : | anton | 1.1 | |
| 82 : | /* this stores a call dodoes at addr */ | ||
| 83 : | anton | 1.6 | #define MAKE_DOES_HANDLER(addr) MAKE_CF(addr,symbols[DODOES]) |
| 84 : | |||
| 85 : | #define DOES_HANDLER_SIZE 8 | ||
| 86 : | |||
| 87 : | #define MAKE_DOES_CF(addr,doesp) ({long *_addr = (long *)(addr); \ | ||
| 88 : | unsigned _doesp = (unsigned)(doesp); \ | ||
| 89 : | _addr[0] = 0x40000000|((_doesp-8-(unsigned)_addr)>>2); /* CALL doesp-8 */ \ | ||
| 90 : | _addr[1] = 0x01000000; /* nop */}) | ||
| 91 : | anton | 1.3 | #endif |
| 92 : | anton | 1.6 |
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