1 /* Catacomb Apocalypse Source Code
2 * Copyright (C) 1993-2014 Flat Rock Software
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
22 =============================================================================
24 ID software memory manager
25 --------------------------
27 Primary coder: John Carmack
31 Quit (char *error) function
36 MM_SizePtr to change the size of a given pointer
38 Multiple purge levels utilized
40 EMS / XMS unmanaged routines
42 =============================================================================
46 Open Watcom port by sparky4
49 #include "src/lib/16_mm.h"
52 =============================================================================
56 =============================================================================
59 void (* beforesort) (void);
60 void (* aftersort) (void);
61 void (* XMSaddr) (void); // far pointer to XMS driver
64 =============================================================================
68 =============================================================================
71 static char *ParmStringsexmm[] = {"noems","noxms",""};
74 ======================
78 = Routine from p36 of Extending DOS
80 =======================
83 boolean MML_CheckForEMS(void)
86 char emmname[] = "EMMXXXX0";
87 // mov dx,OFFSET emmname
89 LEA DX, emmname //fix by andrius4669
91 int 0x21 // try to open EMMXXXX0 device
97 int 0x21 // get device info
105 int 0x21 // get status
111 int 0x21 // close handle
130 ======================
134 =======================
137 unsigned MML_SetupEMS(mminfo_t *mm)
139 char str[80],str2[10];
141 boolean errorflag=false;
144 unsigned int EMSVer = 0;
145 unsigned totalEMSpages,freeEMSpages,EMSpageframe,EMSpagesmapped,EMShandle;
146 totalEMSpages = freeEMSpages = EMSpageframe = EMSpagesmapped = 0;
151 int EMS_INT // make sure EMS hardware is present
159 mov [EMSVer],ax // set EMSVer
160 cmp al,0x32 // only work on ems 3.2 or greater
164 int EMS_INT // find the page frame address
167 mov [EMSpageframe],bx
170 int EMS_INT // find out how much EMS is there
173 mov [totalEMSpages],dx
174 mov [freeEMSpages],bx
176 jz noEMS // no EMS at all to allocate
177 //++++EXPAND DONG!!!!
180 cmp bx,[freeEMSpages]
182 mov bx,[freeEMSpages]
187 jle getpages // there is only 1,2,3,or 4 pages
188 mov bx,4 // we can't use more than 4 pages
191 mov [EMSpagesmapped],bx
192 mov ah,EMS_ALLOCPAGES // allocate up to 64k of EMS
207 strcpy(str,"MML_SetupEMS: EMS error 0x");
213 mm->totalEMSpages=totalEMSpages;
214 mm->freeEMSpages=freeEMSpages;
215 mm->EMSpageframe=EMSpageframe;
216 mm->EMSpagesmapped=EMSpagesmapped;
217 mm->EMShandle=EMShandle;
224 ======================
228 =======================
231 void MML_ShutdownEMS(mminfo_t *mm)
233 boolean errorflag=false;
234 unsigned EMShandle=mm->EMShandle;
248 if(errorflag==true) printf("MML_ShutdownEMS: Error freeing EMS!"); //++++ add something
256 = Maps the 64k of EMS used by memory manager into the page frame
257 = for general use. This only needs to be called if you are keeping
258 = other things in EMS.
263 unsigned MM_MapEMS(mminfo_t *mm)
265 char str[80],str2[10];
266 unsigned err, EMShandle;
267 boolean errorflag=false;
270 EMShandle=mm->EMShandle;
272 for (i=0;i<mm->EMSpagesmapped;i++)
277 mov bx,[i] // logical page
278 mov al,bl // physical page
279 mov dx,[EMShandle] // handle
291 strcpy(str,"MM_MapEMS: EMS error 0x");
301 //==========================================================================
304 ======================
308 = Check for XMM driver
310 =======================
313 boolean MML_CheckForXMS(mminfo_t *mm)
315 boolean errorflag=false;
321 int 0x2f // query status of installed diver
327 if(errorflag==true) return false;
333 ======================
337 = Try to allocate all upper memory block
339 =======================
342 void MML_SetupXMS(mminfo_t *mm, mminfotype *mmi)
351 mov [WORD PTR XMSaddr],bx
352 mov [WORD PTR XMSaddr+2],es // function pointer to XMS driver
355 mov dx,0xffff // try for largest block possible
356 //mov ax,dx // Set available Kbytes.
357 call [DWORD PTR XMSaddr]
361 cmp bl,0xb0 // error: smaller UMB is available
365 call [DWORD PTR XMSaddr] // DX holds largest available UMB
367 jz done // another error...
374 printf("base=%u ", base); printf("size=%u\n", size);
375 MML_UseSpace(base,size, mm);
376 mmi->XMSmem += size*16;
377 mm->UMBbase[mm->numUMBs] = base;
379 if(mm->numUMBs < MAXUMBS)
385 ======================
389 ======================
392 void MML_ShutdownXMS(mminfo_t *mm)
397 for (i=0;i<mm->numUMBs;i++)
399 base = mm->UMBbase[i];
404 call [DWORD PTR XMSaddr]
409 //==========================================================================
412 ======================
416 = Marks a range of paragraphs as usable by the memory manager
417 = This is used to mark space for the near heap, far heap, ems page frame,
418 = and upper memory blocks
420 ======================
423 void MML_UseSpace(/*d*/word segstart, dword seglength, mminfo_t *mm)
425 mmblocktype huge *scan,huge *last;
431 scan = last = mm->mmhead;
432 mm->mmrover = mm->mmhead; // reset rover to start of memory
435 // search for the block that contains the range of segments
437 while(scan->start+scan->length < segstart)
444 // take the given range out of the block
446 oldend = scan->start + scan->length;
447 extra = oldend - (segstart+seglength);
458 printf("extra=%lu ", extra);
459 printf("oldend=%lu ", oldend);
460 printf("length=%u ", scan->length);
461 printf("segstart=%u ", segstart);
462 printf("seglength=%lu\n", seglength);
464 //MML_UseSpace(?segstart?, ?length?, mm);
470 //printf("MML_UseSpace: Segment spans two blocks!\n");
474 //++++todo: linked list of segment!
475 //printf("segm=%lu\n", segm);
476 if(segstart == scan->start)
478 last->next = scan->next; // unlink block
479 MM_FreeBlock(scan, mm);
483 scan->length = segstart-scan->start; // shorten block
490 mm->mmnew->next = scan->next;
491 scan->next = mm->mmnew;
492 mm->mmnew->start = segstart+seglength;
493 mm->mmnew->length = extra;
494 mm->mmnew->attributes = LOCKBIT;
495 }//else if(segm>0) goto segu;
499 //==========================================================================
506 = We are out of blocks, so free a purgable block
511 void MML_ClearBlock(mminfo_t *mm)
513 mmblocktype huge *scan,huge *last;
515 scan = mm->mmhead->next;
519 if(!(scan->attributes&LOCKBIT) && (scan->attributes&PURGEBITS))
521 MM_FreePtr(scan->useptr, mm);
527 printf("MM_ClearBlock: No purgable blocks!\n");
531 //==========================================================================
538 = Grabs all space from turbo with malloc/farmalloc
539 = Allocates bufferseg misc buffer
544 void MM_Startup(mminfo_t *mm, mminfotype *mmi)
547 dword length;//,farlen;
549 unsigned segstart,seglength,endfree;
554 mm->mmstarted = true;
555 mm->bombonerror = true;
557 // set up the linked list (everything in the free list;
560 mm->mmfree = &(mm->mmblocks[0]);
561 for(i=0;i<MAXBLOCKS-1;i++)
563 mm->mmblocks[i].next = &(mm->mmblocks[i+1]);
565 mm->mmblocks[i].next = NULL;
568 // locked block of all memory until we punch out free space
571 mm->mmhead = mm->mmnew; // this will allways be the first node
572 mm->mmnew->start = 0;
573 mm->mmnew->length = 0xffff; //todo: mm make it fucking massive as fuck!~
574 mm->mmnew->attributes = LOCKBIT;
575 mm->mmnew->next = NULL;
576 mm->mmrover = mm->mmhead;
578 // farlen=_bios_memsize()*1024;
581 // get all available near conventional memory segments
583 //---- length=coreleft();
586 start = (void huge *)(mm->nearheap = malloc(length));
588 length -= 16-(FP_OFF(start)&15);
589 length -= SAVENEARHEAP;
590 seglength = length / 16; // now in paragraphs
591 segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
592 MML_UseSpace(segstart,seglength, mm);
593 mmi->nearheap = length;
596 // get all available far conventional memory segments
598 //---- length=farcoreleft();
602 start = mm->farheap = halloc(length, sizeof(dword));
603 //start = mm->farheap = _fmalloc(length);
604 length -= 16-(FP_OFF(start)&15);
605 length -= SAVEFARHEAP;
606 seglength = length / 16; // now in paragraphs
607 segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
608 MML_UseSpace(segstart,seglength, mm);
609 mmi->farheap = length;
610 mmi->mainmem = mmi->nearheap + mmi->farheap;
614 // detect EMS and allocate up to 64K at page frame
616 printf("EMS!\n\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"); //bug!
618 for(i = 1;i < __argc;i++)
620 if(US_CheckParm(__argv[i],ParmStringsexmm) == 0)
621 goto emsskip; // param NOEMS
623 printf("\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"); //bug!
624 if(MML_CheckForEMS())
627 MML_SetupEMS(mm); // allocate space
628 printf("\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"); //bug!
629 //TODO: EMS4! AND EMS 3.2 MASSIVE DATA HANDLMENT!
630 MML_UseSpace(mm->EMSpageframe,(mm->EMSpagesmapped)*0x4000lu, mm);
632 MM_MapEMS(mm); // map in used pages
634 mmi->EMSmem = (mm->EMSpagesmapped)*0x4000lu;
638 // detect XMS and get upper memory blocks
642 for(i = 1;i < __argc;i++)
644 if(US_CheckParm(__argv[i],ParmStringsexmm) == 0)
645 goto xmsskip; // param NOXMS
647 // printf("\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"); //bug!
648 if(MML_CheckForXMS(mm))
651 MML_SetupXMS(mm, mmi); // allocate as many UMBs as possible
655 // allocate the misc buffer
658 mm->mmrover = mm->mmhead; // start looking for space after low block
660 MM_GetPtr(&(mm->bufferseg),BUFFERSIZE, mm, mmi);
663 //==========================================================================
670 = Frees all conventional, EMS, and XMS allocated
675 void MM_Shutdown(mminfo_t *mm)
681 printf("far freed\n");
683 printf("near freed\n");
684 //hfree(mm->hugeheap);
685 //printf("huge freed\n");
686 if(MML_CheckForEMS()){ MML_ShutdownEMS(mm); printf("EMS freed\n"); }
687 if(MML_CheckForXMS(mm)){ MML_ShutdownXMS(mm); printf("XMS freed\n"); }
690 //==========================================================================
697 = Allocates an unlocked, unpurgable block
702 void MM_GetPtr(memptr *baseptr,dword size, mminfo_t *mm, mminfotype *mmi)
704 mmblocktype huge *scan,huge *lastscan,huge *endscan,huge *purge,huge *next;
706 unsigned needed,startseg;
708 needed = (size+15)/16; // convert size from bytes to paragraphs
710 MM_GetNewBlock(mm); // fill in start and next after a spot is found
711 mm->mmnew->length = needed;
712 mm->mmnew->useptr = baseptr;
713 mm->mmnew->attributes = BASEATTRIBUTES;
715 for(search = 0; search<3; search++)
718 // first search: try to allocate right after the rover, then on up
719 // second search: search from the head pointer up to the rover
720 // third search: compress memory, then scan from start
721 if(search == 1 && mm->mmrover == mm->mmhead)
727 lastscan = mm->mmrover;
728 scan = mm->mmrover->next;
732 lastscan = mm->mmhead;
733 scan = mm->mmhead->next;
734 endscan = mm->mmrover;
738 lastscan = mm->mmhead;
739 scan = mm->mmhead->next;
744 startseg = lastscan->start + lastscan->length;
746 while(scan != endscan)
748 if(scan->start - startseg >= needed)
751 // got enough space between the end of lastscan and
752 // the start of scan, so throw out anything in the middle
753 // and allocate the new block
755 purge = lastscan->next;
756 lastscan->next = mm->mmnew;
757 mm->mmnew->start = *(unsigned *)baseptr = startseg;
758 mm->mmnew->next = scan;
760 { // free the purgable block
762 MM_FreeBlock(purge, mm);
763 purge = next; // purge another if not at scan
765 mm->mmrover = mm->mmnew;
766 return; // good allocation!
770 // if this block is purge level zero or locked, skip past it
772 if((scan->attributes & LOCKBIT)
773 || !(scan->attributes & PURGEBITS) )
776 startseg = lastscan->start + lastscan->length;
780 scan=scan->next; // look at next line
785 printf(OUT_OF_MEM_MSG,(size-mmi->nearheap));
790 //==========================================================================
797 = Allocates an unlocked, unpurgable block
802 void MM_FreePtr(memptr *baseptr, mminfo_t *mm)
804 mmblocktype huge *scan,huge *last;
809 if(baseptr == mm->mmrover->useptr) // removed the last allocated block
810 mm->mmrover = mm->mmhead;
812 while(scan->useptr != baseptr && scan)
820 printf("MM_FreePtr: Block not found!");
824 last->next = scan->next;
826 MM_FreeBlock(scan, mm);
828 //==========================================================================
831 =====================
835 = Sets the purge level for a block (locked blocks cannot be made purgable)
837 =====================
840 void MM_SetPurge(memptr *baseptr, int purge, mminfo_t *mm)
842 mmblocktype huge *start;
848 if(mm->mmrover->useptr == baseptr)
851 mm->mmrover = mm->mmrover->next;
854 mm->mmrover = mm->mmhead;
855 else if(mm->mmrover == start)
857 printf("MM_SetPurge: Block not found!");
863 mm->mmrover->attributes &= ~PURGEBITS;
864 mm->mmrover->attributes |= purge;
867 //==========================================================================
870 =====================
874 = Locks / unlocks the block
876 =====================
879 void MM_SetLock(memptr *baseptr, boolean locked, mminfo_t *mm)
881 mmblocktype huge *start;
887 if(mm->mmrover->useptr == baseptr)
890 mm->mmrover = mm->mmrover->next;
893 mm->mmrover = mm->mmhead;
894 else if(mm->mmrover == start)
896 printf("MM_SetLock: Block not found!");
902 mm->mmrover->attributes &= ~LOCKBIT;
903 mm->mmrover->attributes |= locked*LOCKBIT;
906 //==========================================================================
909 =====================
913 = Throws out all purgable stuff and compresses movable blocks
915 =====================
918 void MM_SortMem(mminfo_t *mm)
920 mmblocktype huge *scan,huge *last,huge *next;
921 unsigned start,length,source,dest,oldborder;
925 // lock down a currently playing sound
927 /*++++ playing = SD_SoundPlaying ();
933 playing += STARTPCSOUNDS;
936 playing += STARTADLIBSOUNDS;
939 MM_SetLock(&(memptr)audiosegs[playing],true);
944 // oldborder = bordercolor;
945 // VW_ColorBorder (15);
952 last = NULL; // shut up compiler warning
956 if(scan->attributes & LOCKBIT)
959 // block is locked, so try to pile later blocks right after it
961 start = scan->start + scan->length;
965 if(scan->attributes & PURGEBITS)
968 // throw out the purgable block
971 MM_FreeBlock(scan, mm);
979 // push the non purgable block on top of the last moved block
981 if(scan->start != start)
983 length = scan->length;
984 source = scan->start;
986 while(length > 0xf00)
988 movedata(source,0,dest,0,0xf00*16);
993 movedata(source,0,dest,0,length*16);
996 *(unsigned *)scan->useptr = start;
998 start = scan->start + scan->length;
1003 scan = scan->next; // go to next block
1006 mm->mmrover = mm->mmhead;
1011 // VW_ColorBorder (oldborder);
1014 MM_SetLock(&(memptr)audiosegs[playing],false);*/
1018 //==========================================================================
1022 =====================
1026 =====================
1029 void MM_ShowMemory(mminfo_t *mm)
1031 mmblocktype huge *scan;
1032 unsigned color,temp;//, i;
1034 char scratch[80],str[10];
1036 //**** VW_SetDefaultColors();
1037 //**** VW_SetLineWidth(40);
1038 //++++mh temp = bufferofs;
1039 //++++mh bufferofs = 0;
1040 //**** VW_SetScreen (0,0);
1050 if(scan->attributes & PURGEBITS)
1051 color = 5; // dark purple = purgable
1053 color = 9; // medium blue = non purgable
1054 if(scan->attributes & LOCKBIT)
1055 color = 12; // red = locked
1056 if(scan->start<=end)
1058 printf("MM_ShowMemory: Memory block order currupted!");
1061 end = scan->start+scan->length-1;
1062 //++++ VW_Hlin(scan->start,(unsigned)end,0,color);
1063 //++++ VW_Plot(scan->start,0,15);
1064 if(scan->next->start > end+1)
1065 //++++ VW_Hlin(end+1,scan->next->start,0,0); // black = free
1068 printf("Location:");
1069 printf("%x\t", scan->start);
1070 strcpy (scratch,"Size:");
1071 ltoa ((dword)scan->length*16,str,10);
1072 strcat (scratch,str);
1073 strcat (scratch,"\tOwner:0x");
1074 owner = (unsigned)scan->useptr;
1075 ultoa (owner,str,16);
1076 strcat (scratch,str);
1077 strcat (scratch,"\n");
1078 //++++write (debughandle,scratch,strlen(scratch));
1079 fprintf(stdout, "%s", scratch);
1088 //**** VW_SetLineWidth(64);
1089 //++++mh bufferofs = temp;
1093 //==========================================================================
1097 ======================
1101 = Returns the total free space without purging
1103 ======================
1106 dword MM_UnusedMemory(mminfo_t *mm)
1109 mmblocktype huge *scan;
1116 free += scan->next->start - (scan->start + scan->length);
1124 //==========================================================================
1128 ======================
1132 = Returns the total free space with purging
1134 ======================
1137 dword MM_TotalFree(mminfo_t *mm)
1140 mmblocktype huge *scan;
1147 if((scan->attributes&PURGEBITS) && !(scan->attributes&LOCKBIT))
1148 free += scan->length;
1149 free += scan->next->start - (scan->start + scan->length);
1157 //==========================================================================
1160 =====================
1164 =====================
1167 void MM_Report(mminfo_t *mm, mminfotype *mmi)
1169 if(MML_CheckForEMS())
1171 printf("EMM %x available\n", mm->EMSVer);
1172 printf("totalEMSpages=%u\n", mm->totalEMSpages);
1173 printf("freeEMSpages=%u\n", mm->freeEMSpages);
1174 printf("EMSpageframe=%x\n", mm->EMSpageframe);
1176 if(MML_CheckForXMS(mm)) printf("XMSaddr=%Fp\n", *XMSaddr);
1177 printf("near=%lu\n", mmi->nearheap);
1178 printf("far=%lu\n", mmi->farheap);
1179 printf("EMSmem=%lu\n", mmi->EMSmem);
1180 printf("XMSmem=%lu\n", mmi->XMSmem);
1181 printf("mainmem=%lu\n", mmi->mainmem);
1182 printf("UnusedMemory=%lu\n", MM_UnusedMemory(mm));
1183 printf("TotalFree=%lu\n", MM_TotalFree(mm));
1185 // printf("UnusedMemory=%lu kb\n", MM_UnusedMemory()/10248);
1186 // printf("TotalFree=%lu kb\n", MM_TotalFree()/10248);
1189 //==========================================================================
1192 =====================
1196 =====================
1211 //==========================================================================
1214 =====================
1218 =====================
1221 void MM_BombOnError(boolean bomb, mminfo_t *mm)
1223 mm->bombonerror = bomb;
1226 void MM_GetNewBlock(mminfo_t *mm)
1230 mm->mmnew=mm->mmfree;
1231 mm->mmfree=mm->mmfree->next;
1232 /*if(!(mm->mmnew=mm->mmfree))
1234 printf("MM_GETNEWBLOCK: No free blocks!");
1237 mm->mmfree=mm->mmfree->next;*/
1240 void MM_FreeBlock(mmblocktype *x, mminfo_t *mm)
1247 void MM_seguin(void)
1258 void MM_segude(void)
1267 pull data from far and put it into ds var