![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to mem.h CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [Atari MiNT] / MiNT / src|
Return to mem.h CVS log | Up to [Atari MiNT] / MiNT / src |
1.1 root 1: /*
2:
1.1.1.3 root 3: Copyright 1990,1991,1992 Eric R. Smith.
4:
1.1.1.4 ! root 5: Copyright 1992,1993 Atari Corporation.
1.1.1.3 root 6:
7: All rights reserved.
1.1 root 8:
9: */
10:
11:
12:
13: #ifndef _mem_h
14:
15: #define _mem_h
16:
17:
18:
1.1.1.2 root 19: #include "file.h"
20:
21:
22:
1.1 root 23: typedef struct memregion {
24:
25: long loc; /* base of memory region */
26:
27: ulong len; /* length of memory region */
28:
29: ushort links; /* number of users of region */
30:
31: ushort mflags; /* e.g. which map this came from */
32:
33: struct memregion *next; /* next region in memory map */
34:
35: } MEMREGION;
36:
37:
38:
1.1.1.4 ! root 39: /* flags for memory regions: these are used only in MEMREGION struct */
1.1 root 40:
1.1.1.4 ! root 41: #define M_CORE 0x01 /* region came from core map */
1.1 root 42:
1.1.1.4 ! root 43: #define M_ALT 0x02 /* region came from alt map */
1.1 root 44:
1.1.1.4 ! root 45: #define M_SWAP 0x04 /* region came from swap map */
1.1 root 46:
1.1.1.4 ! root 47: #define M_KER 0x08 /* region came from kernel map */
1.1 root 48:
1.1.1.4 ! root 49: #define M_MAP 0x0f /* and with this to pick out map */
1.1 root 50:
1.1.1.3 root 51:
52:
1.1.1.4 ! root 53: #define M_SHTEXT 0x10 /* region is a shared text region */
1.1.1.3 root 54:
1.1.1.4 ! root 55: #define M_KEEP 0x0100 /* don't free on process termination */
1.1.1.3 root 56:
57:
58:
1.1.1.4 ! root 59: /* dummy type for virtual addresses */
1.1.1.3 root 60:
1.1.1.4 ! root 61: typedef struct vaddr {
1.1.1.3 root 62:
1.1.1.4 ! root 63: char dummy;
1.1.1.3 root 64:
1.1.1.4 ! root 65: } *virtaddr;
1.1.1.3 root 66:
67:
68:
1.1.1.4 ! root 69: /* structure for shared text regions */
1.1.1.3 root 70:
71:
72:
1.1.1.4 ! root 73: typedef struct shtextreg {
1.1.1.3 root 74:
1.1.1.4 ! root 75: FILEPTR *f; /* what file did this come from? */
1.1.1.3 root 76:
1.1.1.4 ! root 77: MEMREGION *text; /* pointer to shared text region */
1.1 root 78:
1.1.1.4 ! root 79: short mtime, mdate; /* date & time for file */
1.1.1.2 root 80:
1.1.1.4 ! root 81: struct shtextreg *next;
1.1.1.2 root 82:
1.1.1.4 ! root 83: } SHTEXT;
1.1.1.2 root 84:
85:
86:
1.1.1.4 ! root 87: /*
1.1.1.2 root 88:
1.1.1.4 ! root 89: * Here's the deal with memory bits:
1.1.1.2 root 90:
1.1.1.4 ! root 91: *
1.1.1.2 root 92:
1.1.1.4 ! root 93: * Mxalloc(long size, int mode) takes these fields in 'mode': BITS 0-2 hold
1.1.1.2 root 94:
1.1.1.4 ! root 95: * values 0-3 for the old GEMDOS mode argument. If bit 3 is on, then only
1.1.1.2 root 96:
1.1.1.4 ! root 97: * F_PROTMODE (bits 4-7) counts, and it encodes the desired protection mode
1.1.1.2 root 98:
1.1.1.4 ! root 99: * to change a block to. Else F_PROTMODE is the desired protection mode for
1.1.1.2 root 100:
1.1.1.4 ! root 101: * the new block you're allocating. In either case, F_PROTMODE turns into
1.1.1.2 root 102:
1.1.1.4 ! root 103: * a PROT_* thusly: if it's zero, you get the F_PROTMODE value from curproc's
1.1.1.2 root 104:
1.1.1.4 ! root 105: * prgflags. Else you get (F_PROTMODE >> F_PROTSHIFT)-1.
1.1.1.2 root 106:
1.1.1.4 ! root 107: *
1.1.1.2 root 108:
1.1.1.4 ! root 109: * The 0x4000 bit is carried along into get_region (but not from there into
1.1.1.2 root 110:
1.1.1.4 ! root 111: * mark_region) and, if set, causes M_KEEP to be set in the region's
1.1.1.2 root 112:
1.1.1.4 ! root 113: * mflags.
1.1 root 114:
1.1.1.4 ! root 115: */
1.1 root 116:
117:
118:
1.1.1.2 root 119: /* structure of exectuable program headers */
1.1 root 120:
1.1.1.2 root 121: typedef struct fileheader {
1.1 root 122:
1.1.1.2 root 123: short fmagic;
1.1 root 124:
1.1.1.2 root 125: long ftext;
126:
127: long fdata;
128:
129: long fbss;
130:
131: long fsym;
132:
133: long reserved;
134:
135: long flag;
136:
137: short reloc;
138:
139: } FILEHEAD;
140:
141:
142:
143: #define GEMDOS_MAGIC 0x601a
1.1 root 144:
145:
146:
147: /* flags for curproc->memflags */
148:
1.1.1.3 root 149: /* also used for program headers PRGFLAGS */
1.1.1.2 root 150:
1.1 root 151: #define F_FASTLOAD 0x01 /* don't zero heap */
152:
153: #define F_ALTLOAD 0x02 /* OK to load in alternate ram */
154:
155: #define F_ALTALLOC 0x04 /* OK to malloc from alt. ram */
156:
1.1.1.2 root 157: #define F_RESERVED 0x08 /* reserved for future use */
158:
159: #define F_MEMFLAGS 0xf0 /* reserved for future use */
160:
161: #define F_SHTEXT 0x800 /* program's text may be shared */
162:
163:
164:
165: #define F_MINALT 0xf0000000L /* used to decide which type of RAM to load in */
166:
1.1 root 167:
168:
1.1.1.3 root 169: /* Bit in Mxalloc's arg for "don't auto-free this memory" */
170:
171: #define F_KEEP 0x4000
172:
173:
174:
175: #define F_OS_SPECIAL 0x8000 /* mark as a special process */
176:
177:
178:
179: /* flags for curproc->memflags (that is, PRGFLAGS) and also Mxalloc mode. */
180:
181: /* (Actually, when users call Mxalloc, they add 0x10 to what you see here) */
182:
183: #define F_PROTMODE 0xf0 /* protection mode bits */
184:
185: #define F_PROT_P 0x00 /* no read or write */
186:
187: #define F_PROT_G 0x10 /* any access OK */
1.1 root 188:
1.1.1.3 root 189: #define F_PROT_S 0x20 /* any super access OK */
190:
191: #define F_PROT_PR 0x30 /* any read OK, no write */
192:
193: #define F_PROT_I 0x40 /* invalid page */
194:
195:
196:
197: /* actual values found in page_mode_table and used as args to alloc_region */
198:
199: #define PROT_P 0
200:
201: #define PROT_G 1
202:
203: #define PROT_S 2
204:
205: #define PROT_PR 3
206:
207: #define PROT_I 4
208:
1.1.1.4 ! root 209: #define PROT_MAX_MODE 4
! 210:
1.1.1.3 root 211: #define PROT_PROTMODE 0xf /* these bits are the prot mode */
212:
213: #define PROT_NOCHANGE -1
214:
215:
216:
217: #define F_PROTSHIFT 4
1.1 root 218:
219:
220:
221: typedef MEMREGION **MMAP;
222:
1.1.1.2 root 223:
224:
225: #ifndef GENMAGIC
226:
1.1 root 227: extern MMAP core, alt, ker, swap;
228:
1.1.1.2 root 229: #endif
230:
1.1 root 231:
232:
233: /* compilers differ on what "sizeof" returns */
234:
235: #define SIZEOF (long)sizeof
236:
237:
238:
1.1.1.3 root 239: /* QUANTUM: the page size for the mmu: 8K. This is hard-coded elsewhere. */
240:
241: #define QUANTUM 0x2000L
242:
243:
244:
245: /* MiNT leaves this much memory for TOS to use (8K)
1.1 root 246:
247: */
248:
1.1.1.3 root 249: #define TOS_MEM (QUANTUM)
1.1 root 250:
251:
252:
253: /* MiNT tries to keep this much memory available for the kernel and other
254:
1.1.1.3 root 255: * programs when a program is launched (8K)
1.1 root 256:
257: */
258:
1.1.1.3 root 259: #define KEEP_MEM (QUANTUM)
1.1 root 260:
261:
262:
263: /*
264:
1.1.1.3 root 265: * how much memory should be allocated to the kernel? (24K)
266:
267: */
268:
269: #define KERNEL_MEM (3*QUANTUM)
270:
271:
272:
273: /* macro for rounding off region sizes to QUANTUM (page) boundaries */
274:
275: /* there is code in mem.c that assumes it's OK to put the screen
276:
277: * in any region, so this should be at least 256 for STs (16 is OK for
278:
279: * STes, TTs, and Falcons). We actually set a variable in main.c
280:
281: * that holds the screen boundary stuff.
1.1 root 282:
283: */
284:
1.1.1.3 root 285: extern int no_mem_prot;
1.1 root 286:
1.1.1.3 root 287: extern int screen_boundary;
1.1 root 288:
289:
290:
1.1.1.3 root 291: #define MASKBITS (no_mem_prot ? screen_boundary : (QUANTUM-1))
1.1 root 292:
293: #define ROUND(size) ((size + MASKBITS) & ~MASKBITS)
294:
295:
296:
1.1.1.3 root 297: /* interesting memory constants */
298:
299:
300:
301: #define EIGHT_K (0x400L*8L)
302:
303: #define ONE_MEG 0x00100000L
304:
305: #define LOG2_ONE_MEG 20
306:
307: #define LOG2_16_MEG 24
308:
309: #define LOG2_EIGHT_K 13
310:
311: #define SIXTEEN_MEG (0x400L*0x400L*16L)
312:
313:
314:
315: /* macro for turning a curproc->base_table pointer into a 16-byte boundary */
316:
317: #define ROUND16(ld) ((long_desc *)(((ulong)(ld) + 15) & ~15))
318:
319:
320:
321: /* TBL_SIZE is the size in entries of the A, B, and C level tables */
322:
323: #define TBL_SIZE (16)
324:
325: #define TBL_SIZE_BYTES (TBL_SIZE * sizeof(long_desc))
326:
327:
328:
329: typedef struct {
330:
331: short limit;
332:
333: unsigned zeros:14;
334:
335: unsigned dt:2;
336:
337: struct long_desc *tbl_address;
338:
339: } crp_reg;
340:
341:
342:
343: /* format of long descriptors, both page descriptors and table descriptors */
344:
345:
346:
347: typedef struct {
348:
349: unsigned limit; /* set to $7fff to disable */
350:
351: unsigned unused1:6;
352:
353: unsigned unused2:1;
354:
355: unsigned s:1; /* 1 grants supervisor access only */
356:
357: unsigned unused3:1;
358:
359: unsigned ci:1; /* cache inhibit: used in page desc only */
360:
361: unsigned unused4:1;
362:
363: unsigned m:1; /* modified: used in page desc only */
364:
365: unsigned u:1; /* accessed */
366:
367: unsigned wp:1; /* write-protected */
368:
369: unsigned dt:2; /* type */
370:
371: } page_type;
372:
373:
374:
375: typedef struct long_desc {
376:
377: page_type page_type;
378:
379: struct long_desc *tbl_address;
380:
381: } long_desc;
382:
383:
384:
385: typedef struct {
386:
387: unsigned enable:1;
388:
389: unsigned zeros:5;
390:
391: unsigned sre:1;
392:
393: unsigned fcl:1;
394:
395: unsigned ps:4;
396:
397: unsigned is:4;
398:
399: unsigned tia:4;
400:
401: unsigned tib:4;
402:
403: unsigned tic:4;
404:
405: unsigned tid:4;
406:
407: } tc_reg;
408:
409:
410:
1.1 root 411: #endif /* _mem_h */
412:
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.