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
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;
429 scan = last = mm->mmhead;
430 mm->mmrover = mm->mmhead; // reset rover to start of memory
433 // search for the block that contains the range of segments
435 while(scan->start+scan->length < segstart)
441 //find out how many blocks it span!
442 if(seglength>0xfffflu)
444 scan->segm=seglength/0xffffu;
449 // take the given range out of the block
451 oldend = scan->start + scan->length;
452 extra = oldend - (segstart+seglength);
463 printf("segm=%u ", scan->segm);
464 printf("ex=%lu ", extra);
465 printf("len=%u ", scan->length);
466 printf("segsta=%x ", segstart);
467 printf("seglen=%lu\n", seglength);
469 //MML_UseSpace(?segstart?, ?length?, mm);
475 //printf("MML_UseSpace: Segment spans two blocks!\n");
479 //++++todo: linked list of segment!
480 //printf("segm=%lu\n", segm);
481 if(segstart == scan->start)
483 last->next = scan->next; // unlink block
484 MM_FreeBlock(scan, mm);
488 scan->length = segstart-scan->start; // shorten block
495 mm->mmnew->next = scan->next;
496 scan->next = mm->mmnew;
497 mm->mmnew->start = segstart+seglength;
498 mm->mmnew->length = extra;
499 mm->mmnew->attributes = LOCKBIT;
500 }//else if(segm>0) goto segu;
504 //==========================================================================
511 = We are out of blocks, so free a purgable block
516 void MML_ClearBlock(mminfo_t *mm)
518 mmblocktype huge *scan,huge *last;
520 scan = mm->mmhead->next;
524 if(!(scan->attributes&LOCKBIT) && (scan->attributes&PURGEBITS))
526 MM_FreePtr(scan->useptr, mm);
532 printf("MM_ClearBlock: No purgable blocks!\n");
536 //==========================================================================
543 = Grabs all space from turbo with malloc/farmalloc
544 = Allocates bufferseg misc buffer
549 void MM_Startup(mminfo_t *mm, mminfotype *mmi)
552 dword length;//,farlen;
554 unsigned segstart,seglength,endfree;
559 mm->mmstarted = true;
560 mm->bombonerror = true;
562 // set up the linked list (everything in the free list;
565 mm->mmfree = &(mm->mmblocks[0]);
566 for(i=0;i<MAXBLOCKS-1;i++)
568 mm->mmblocks[i].next = &(mm->mmblocks[i+1]);
570 mm->mmblocks[i].next = NULL;
573 // locked block of all memory until we punch out free space
576 mm->mmhead = mm->mmnew; // this will allways be the first node
577 mm->mmnew->start = 0;
578 mm->mmnew->length = 0xffff; //todo: mm make it fucking massive as fuck!~
579 mm->mmnew->attributes = LOCKBIT;
580 mm->mmnew->next = NULL;
581 mm->mmrover = mm->mmhead;
583 // farlen=_bios_memsize()*1024;
586 // get all available near conventional memory segments
588 //---- length=coreleft();
591 start = (void huge *)(mm->nearheap = malloc(length));
593 length -= 16-(FP_OFF(start)&15);
594 length -= SAVENEARHEAP;
595 seglength = length / 16; // now in paragraphs
596 segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
597 MML_UseSpace(segstart,seglength, mm);
598 mmi->nearheap = length;
601 // get all available far conventional memory segments
603 //---- length=farcoreleft();
607 start = mm->farheap = halloc(length, sizeof(dword));
608 //start = mm->farheap = _fmalloc(length);
609 length -= 16-(FP_OFF(start)&15);
610 length -= SAVEFARHEAP;
611 seglength = length / 16; // now in paragraphs
612 segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
613 MML_UseSpace(segstart,seglength, mm);
614 mmi->farheap = length;
615 mmi->mainmem = mmi->nearheap + mmi->farheap;
619 // detect EMS and allocate up to 64K at page frame
621 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!
623 for(i = 1;i < __argc;i++)
625 if(US_CheckParm(__argv[i],ParmStringsexmm) == 0)
626 goto emsskip; // param NOEMS
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 if(MML_CheckForEMS())
632 MML_SetupEMS(mm); // allocate space
633 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!
634 //TODO: EMS4! AND EMS 3.2 MASSIVE DATA HANDLMENT!
635 MML_UseSpace(mm->EMSpageframe,(mm->EMSpagesmapped)*0x4000lu, mm);
637 MM_MapEMS(mm); // map in used pages
639 mmi->EMSmem = (mm->EMSpagesmapped)*0x4000lu;
643 // detect XMS and get upper memory blocks
647 for(i = 1;i < __argc;i++)
649 if(US_CheckParm(__argv[i],ParmStringsexmm) == 0)
650 goto xmsskip; // param NOXMS
652 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!
653 if(MML_CheckForXMS(mm))
656 MML_SetupXMS(mm, mmi); // allocate as many UMBs as possible
660 // allocate the misc buffer
663 mm->mmrover = mm->mmhead; // start looking for space after low block
665 MM_GetPtr(&(mm->bufferseg),BUFFERSIZE, mm, mmi);
668 //==========================================================================
675 = Frees all conventional, EMS, and XMS allocated
680 void MM_Shutdown(mminfo_t *mm)
686 printf("far freed\n");
688 printf("near freed\n");
689 //hfree(mm->hugeheap);
690 //printf("huge freed\n");
691 if(MML_CheckForEMS()){ MML_ShutdownEMS(mm); printf("EMS freed\n"); }
692 if(MML_CheckForXMS(mm)){ MML_ShutdownXMS(mm); printf("XMS freed\n"); }
695 //==========================================================================
702 = Allocates an unlocked, unpurgable block
707 void MM_GetPtr(memptr *baseptr,dword size, mminfo_t *mm, mminfotype *mmi)
709 mmblocktype huge *scan,huge *lastscan,huge *endscan,huge *purge,huge *next;
711 unsigned needed,startseg;
713 needed = (size+15)/16; // convert size from bytes to paragraphs
715 MM_GetNewBlock(mm); // fill in start and next after a spot is found
716 mm->mmnew->length = needed;
717 mm->mmnew->useptr = baseptr;
718 mm->mmnew->attributes = BASEATTRIBUTES;
720 for(search = 0; search<3; search++)
723 // first search: try to allocate right after the rover, then on up
724 // second search: search from the head pointer up to the rover
725 // third search: compress memory, then scan from start
726 if(search == 1 && mm->mmrover == mm->mmhead)
732 lastscan = mm->mmrover;
733 scan = mm->mmrover->next;
737 lastscan = mm->mmhead;
738 scan = mm->mmhead->next;
739 endscan = mm->mmrover;
743 lastscan = mm->mmhead;
744 scan = mm->mmhead->next;
749 startseg = lastscan->start + lastscan->length;
751 while(scan != endscan)
753 if(scan->start - startseg >= needed)
756 // got enough space between the end of lastscan and
757 // the start of scan, so throw out anything in the middle
758 // and allocate the new block
760 purge = lastscan->next;
761 lastscan->next = mm->mmnew;
762 mm->mmnew->start = *(unsigned *)baseptr = startseg;
763 mm->mmnew->next = scan;
765 { // free the purgable block
767 MM_FreeBlock(purge, mm);
768 purge = next; // purge another if not at scan
770 mm->mmrover = mm->mmnew;
771 return; // good allocation!
775 // if this block is purge level zero or locked, skip past it
777 if((scan->attributes & LOCKBIT)
778 || !(scan->attributes & PURGEBITS) )
781 startseg = lastscan->start + lastscan->length;
785 scan=scan->next; // look at next line
790 printf(OUT_OF_MEM_MSG,(size-mmi->nearheap));
795 //==========================================================================
802 = Allocates an unlocked, unpurgable block
807 void MM_FreePtr(memptr *baseptr, mminfo_t *mm)
809 mmblocktype huge *scan,huge *last;
814 if(baseptr == mm->mmrover->useptr) // removed the last allocated block
815 mm->mmrover = mm->mmhead;
817 while(scan->useptr != baseptr && scan)
825 printf("MM_FreePtr: Block not found!");
829 last->next = scan->next;
831 MM_FreeBlock(scan, mm);
833 //==========================================================================
836 =====================
840 = Sets the purge level for a block (locked blocks cannot be made purgable)
842 =====================
845 void MM_SetPurge(memptr *baseptr, int purge, mminfo_t *mm)
847 mmblocktype huge *start;
853 if(mm->mmrover->useptr == baseptr)
856 mm->mmrover = mm->mmrover->next;
859 mm->mmrover = mm->mmhead;
860 else if(mm->mmrover == start)
862 printf("MM_SetPurge: Block not found!");
868 mm->mmrover->attributes &= ~PURGEBITS;
869 mm->mmrover->attributes |= purge;
872 //==========================================================================
875 =====================
879 = Locks / unlocks the block
881 =====================
884 void MM_SetLock(memptr *baseptr, boolean locked, mminfo_t *mm)
886 mmblocktype huge *start;
892 if(mm->mmrover->useptr == baseptr)
895 mm->mmrover = mm->mmrover->next;
898 mm->mmrover = mm->mmhead;
899 else if(mm->mmrover == start)
901 printf("MM_SetLock: Block not found!");
907 mm->mmrover->attributes &= ~LOCKBIT;
908 mm->mmrover->attributes |= locked*LOCKBIT;
911 //==========================================================================
914 =====================
918 = Throws out all purgable stuff and compresses movable blocks
920 =====================
923 void MM_SortMem(mminfo_t *mm)
925 mmblocktype huge *scan,huge *last,huge *next;
926 unsigned start,length,source,dest,oldborder;
930 // lock down a currently playing sound
932 /*++++ playing = SD_SoundPlaying ();
938 playing += STARTPCSOUNDS;
941 playing += STARTADLIBSOUNDS;
944 MM_SetLock(&(memptr)audiosegs[playing],true);
949 // oldborder = bordercolor;
950 // VW_ColorBorder (15);
957 last = NULL; // shut up compiler warning
961 if(scan->attributes & LOCKBIT)
964 // block is locked, so try to pile later blocks right after it
966 start = scan->start + scan->length;
970 if(scan->attributes & PURGEBITS)
973 // throw out the purgable block
976 MM_FreeBlock(scan, mm);
984 // push the non purgable block on top of the last moved block
986 if(scan->start != start)
988 length = scan->length;
989 source = scan->start;
991 while(length > 0xf00)
993 movedata(source,0,dest,0,0xf00*16);
998 movedata(source,0,dest,0,length*16);
1000 scan->start = start;
1001 *(unsigned *)scan->useptr = start;
1003 start = scan->start + scan->length;
1008 scan = scan->next; // go to next block
1011 mm->mmrover = mm->mmhead;
1016 // VW_ColorBorder (oldborder);
1019 MM_SetLock(&(memptr)audiosegs[playing],false);*/
1023 //==========================================================================
1027 =====================
1031 =====================
1034 void MM_ShowMemory(mminfo_t *mm)
1036 mmblocktype huge *scan;
1037 unsigned color,temp;//, i;
1039 char scratch[160],str[16];
1041 //**** VW_SetDefaultColors();
1042 //**** VW_SetLineWidth(40);
1043 //++++mh temp = bufferofs;
1044 //++++mh bufferofs = 0;
1045 //**** VW_SetScreen (0,0);
1055 if(scan->attributes & PURGEBITS)
1056 color = 5; // dark purple = purgable
1058 color = 9; // medium blue = non purgable
1059 if(scan->attributes & LOCKBIT)
1060 color = 12; // red = locked
1061 if(scan->start<=end)
1063 printf("\nMM_ShowMemory: Memory block order currupted!\n");
1066 end = scan->start+scan->length-1;
1067 //++++ VW_Hlin(scan->start,(unsigned)end,0,color);
1068 //++++ VW_Plot(scan->start,0,15);
1069 if(scan->next->start > end+1)
1070 //++++ VW_Hlin(end+1,scan->next->start,0,0); // black = free
1073 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!
1074 strcpy(scratch,"Location:");
1075 ultoa (scan->start,str,16);
1076 strcat (scratch,str);
1077 strcat (scratch,"\tSize:");
1078 ltoa ((dword)scan->length*16,str,10);
1079 strcat (scratch,str);
1080 strcat (scratch,"\tOwner:0x");
1081 owner = (unsigned)scan->useptr;
1082 ultoa (owner,str,16);
1083 strcat (scratch,str);
1084 strcat (scratch,"\n");
1085 //++++write (debughandle,scratch,strlen(scratch));
1086 fprintf(stdout, "%s", scratch);
1095 //**** VW_SetLineWidth(64);
1096 //++++mh bufferofs = temp;
1100 //==========================================================================
1104 ======================
1108 = Returns the total free space without purging
1110 ======================
1113 dword MM_UnusedMemory(mminfo_t *mm)
1116 mmblocktype huge *scan;
1123 free += scan->next->start - (scan->start + scan->length);
1131 //==========================================================================
1135 ======================
1139 = Returns the total free space with purging
1141 ======================
1144 dword MM_TotalFree(mminfo_t *mm)
1147 mmblocktype huge *scan;
1154 if((scan->attributes&PURGEBITS) && !(scan->attributes&LOCKBIT))
1155 free += scan->length;
1156 free += scan->next->start - (scan->start + scan->length);
1164 //==========================================================================
1167 =====================
1171 =====================
1174 void MM_Report(mminfo_t *mm, mminfotype *mmi)
1176 if(MML_CheckForEMS())
1178 printf("EMM %x available\n", mm->EMSVer);
1179 printf("totalEMSpages=%u\n", mm->totalEMSpages);
1180 printf("freeEMSpages=%u\n", mm->freeEMSpages);
1181 printf("EMSpageframe=%x\n", mm->EMSpageframe);
1183 if(MML_CheckForXMS(mm)) printf("XMSaddr=%Fp\n", *XMSaddr);
1184 printf("near=%lu\n", mmi->nearheap);
1185 printf("far=%lu\n", mmi->farheap);
1186 printf("EMSmem=%lu\n", mmi->EMSmem);
1187 printf("XMSmem=%lu\n", mmi->XMSmem);
1188 printf("mainmem=%lu\n", mmi->mainmem);
1189 printf("UnusedMemory=%lu\n", MM_UnusedMemory(mm));
1190 printf("TotalFree=%lu\n", MM_TotalFree(mm));
1192 // printf("UnusedMemory=%lu kb\n", MM_UnusedMemory()/10248);
1193 // printf("TotalFree=%lu kb\n", MM_TotalFree()/10248);
1196 //==========================================================================
1199 =====================
1203 =====================
1218 //==========================================================================
1221 =====================
1225 =====================
1228 void MM_BombOnError(boolean bomb, mminfo_t *mm)
1230 mm->bombonerror = bomb;
1233 void MM_GetNewBlock(mminfo_t *mm)
1237 mm->mmnew=mm->mmfree;
1238 mm->mmfree=mm->mmfree->next;
1239 /*if(!(mm->mmnew=mm->mmfree))
1241 printf("MM_GETNEWBLOCK: No free blocks!");
1244 mm->mmfree=mm->mmfree->next;*/
1247 void MM_FreeBlock(mmblocktype *x, mminfo_t *mm)
1254 void MM_seguin(void)
1265 void MM_segude(void)
1274 pull data from far and put it into ds var