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);
451 /*segm=(extra%(0xfffflu))-1;
454 /*printf("extra=%lu ", extra);
455 printf("oldend=%lu ", oldend);
456 printf("segm=%lu\n", segm);*/
457 printf("MML_UseSpace: Segment spans two blocks!\n");
461 //++++todo: linked list of segment!
462 //printf("segm=%lu\n", segm);
463 if(segstart == scan->start)
465 last->next = scan->next; // unlink block
466 MM_FreeBlock(scan, mm);
470 scan->length = segstart-scan->start; // shorten block
477 mm->mmnew->next = scan->next;
478 scan->next = mm->mmnew;
479 mm->mmnew->start = segstart+seglength;
480 mm->mmnew->length = extra;
481 mm->mmnew->attributes = LOCKBIT;
482 }//else if(segm>0) goto segu;
486 //==========================================================================
493 = We are out of blocks, so free a purgable block
498 void MML_ClearBlock(mminfo_t *mm)
500 mmblocktype huge *scan,huge *last;
502 scan = mm->mmhead->next;
506 if(!(scan->attributes&LOCKBIT) && (scan->attributes&PURGEBITS))
508 MM_FreePtr(scan->useptr, mm);
514 printf("MM_ClearBlock: No purgable blocks!\n");
518 //==========================================================================
525 = Grabs all space from turbo with malloc/farmalloc
526 = Allocates bufferseg misc buffer
531 void MM_Startup(mminfo_t *mm, mminfotype *mmi)
534 dword length;//,farlen;
536 unsigned segstart,seglength,endfree;
541 mm->mmstarted = true;
542 mm->bombonerror = true;
544 // set up the linked list (everything in the free list;
547 mm->mmfree = &(mm->mmblocks[0]);
548 for(i=0;i<MAXBLOCKS-1;i++)
550 mm->mmblocks[i].next = &(mm->mmblocks[i+1]);
552 mm->mmblocks[i].next = NULL;
555 // locked block of all memory until we punch out free space
558 mm->mmhead = mm->mmnew; // this will allways be the first node
559 mm->mmnew->start = 0;
560 mm->mmnew->length = 0xffff; //todo: mm make it fucking massive as fuck!~
561 mm->mmnew->attributes = LOCKBIT;
562 mm->mmnew->next = NULL;
563 mm->mmrover = mm->mmhead;
565 // farlen=_bios_memsize()*1024;
568 // get all available near conventional memory segments
570 //---- length=coreleft();
573 start = (void huge *)(mm->nearheap = malloc(length));
575 length -= 16-(FP_OFF(start)&15);
576 length -= SAVENEARHEAP;
577 seglength = length / 16; // now in paragraphs
578 segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
579 MML_UseSpace(segstart,seglength, mm);
580 mmi->nearheap = length;
583 // get all available far conventional memory segments
585 //---- length=farcoreleft();
589 start = mm->farheap = halloc(length, sizeof(dword));
590 //start = mm->farheap = _fmalloc(length);
591 length -= 16-(FP_OFF(start)&15);
592 length -= SAVEFARHEAP;
593 seglength = length / 16; // now in paragraphs
594 segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
595 MML_UseSpace(segstart,seglength, mm);
596 mmi->farheap = length;
597 mmi->mainmem = mmi->nearheap + mmi->farheap;
601 // detect EMS and allocate up to 64K at page frame
603 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!
605 for(i = 1;i < __argc;i++)
607 if(US_CheckParm(__argv[i],ParmStringsexmm) == 0)
608 goto emsskip; // param NOEMS
610 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!
611 if(MML_CheckForEMS())
614 MML_SetupEMS(mm); // allocate space
615 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!
616 //TODO: EMS4! AND EMS 3.2 MASSIVE DATA HANDLMENT!
617 MML_UseSpace(mm->EMSpageframe,(mm->EMSpagesmapped)*0x4000lu, mm);
619 MM_MapEMS(mm); // map in used pages
621 mmi->EMSmem = (mm->EMSpagesmapped)*0x4000lu;
625 // detect XMS and get upper memory blocks
629 for(i = 1;i < __argc;i++)
631 if(US_CheckParm(__argv[i],ParmStringsexmm) == 0)
632 goto xmsskip; // param NOXMS
634 // 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!
635 if(MML_CheckForXMS(mm))
638 MML_SetupXMS(mm, mmi); // allocate as many UMBs as possible
642 // allocate the misc buffer
645 mm->mmrover = mm->mmhead; // start looking for space after low block
647 MM_GetPtr(&(mm->bufferseg),BUFFERSIZE, mm, mmi);
650 //==========================================================================
657 = Frees all conventional, EMS, and XMS allocated
662 void MM_Shutdown(mminfo_t *mm)
668 printf("far freed\n");
670 printf("near freed\n");
671 //hfree(mm->hugeheap);
672 //printf("huge freed\n");
673 if(MML_CheckForEMS()){ MML_ShutdownEMS(mm); printf("EMS freed\n"); }
674 if(MML_CheckForXMS(mm)){ MML_ShutdownXMS(mm); printf("XMS freed\n"); }
677 //==========================================================================
684 = Allocates an unlocked, unpurgable block
689 void MM_GetPtr(memptr *baseptr,dword size, mminfo_t *mm, mminfotype *mmi)
691 mmblocktype huge *scan,huge *lastscan,huge *endscan,huge *purge,huge *next;
693 unsigned needed,startseg;
695 needed = (size+15)/16; // convert size from bytes to paragraphs
697 MM_GetNewBlock(mm); // fill in start and next after a spot is found
698 mm->mmnew->length = needed;
699 mm->mmnew->useptr = baseptr;
700 mm->mmnew->attributes = BASEATTRIBUTES;
702 for(search = 0; search<3; search++)
705 // first search: try to allocate right after the rover, then on up
706 // second search: search from the head pointer up to the rover
707 // third search: compress memory, then scan from start
708 if(search == 1 && mm->mmrover == mm->mmhead)
714 lastscan = mm->mmrover;
715 scan = mm->mmrover->next;
719 lastscan = mm->mmhead;
720 scan = mm->mmhead->next;
721 endscan = mm->mmrover;
725 lastscan = mm->mmhead;
726 scan = mm->mmhead->next;
731 startseg = lastscan->start + lastscan->length;
733 while(scan != endscan)
735 if(scan->start - startseg >= needed)
738 // got enough space between the end of lastscan and
739 // the start of scan, so throw out anything in the middle
740 // and allocate the new block
742 purge = lastscan->next;
743 lastscan->next = mm->mmnew;
744 mm->mmnew->start = *(unsigned *)baseptr = startseg;
745 mm->mmnew->next = scan;
747 { // free the purgable block
749 MM_FreeBlock(purge, mm);
750 purge = next; // purge another if not at scan
752 mm->mmrover = mm->mmnew;
753 return; // good allocation!
757 // if this block is purge level zero or locked, skip past it
759 if((scan->attributes & LOCKBIT)
760 || !(scan->attributes & PURGEBITS) )
763 startseg = lastscan->start + lastscan->length;
767 scan=scan->next; // look at next line
772 printf(OUT_OF_MEM_MSG,(size-mmi->nearheap));
777 //==========================================================================
784 = Allocates an unlocked, unpurgable block
789 void MM_FreePtr(memptr *baseptr, mminfo_t *mm)
791 mmblocktype huge *scan,huge *last;
796 if(baseptr == mm->mmrover->useptr) // removed the last allocated block
797 mm->mmrover = mm->mmhead;
799 while(scan->useptr != baseptr && scan)
807 printf("MM_FreePtr: Block not found!");
811 last->next = scan->next;
813 MM_FreeBlock(scan, mm);
815 //==========================================================================
818 =====================
822 = Sets the purge level for a block (locked blocks cannot be made purgable)
824 =====================
827 void MM_SetPurge(memptr *baseptr, int purge, mminfo_t *mm)
829 mmblocktype huge *start;
835 if(mm->mmrover->useptr == baseptr)
838 mm->mmrover = mm->mmrover->next;
841 mm->mmrover = mm->mmhead;
842 else if(mm->mmrover == start)
844 printf("MM_SetPurge: Block not found!");
850 mm->mmrover->attributes &= ~PURGEBITS;
851 mm->mmrover->attributes |= purge;
854 //==========================================================================
857 =====================
861 = Locks / unlocks the block
863 =====================
866 void MM_SetLock(memptr *baseptr, boolean locked, mminfo_t *mm)
868 mmblocktype huge *start;
874 if(mm->mmrover->useptr == baseptr)
877 mm->mmrover = mm->mmrover->next;
880 mm->mmrover = mm->mmhead;
881 else if(mm->mmrover == start)
883 printf("MM_SetLock: Block not found!");
889 mm->mmrover->attributes &= ~LOCKBIT;
890 mm->mmrover->attributes |= locked*LOCKBIT;
893 //==========================================================================
896 =====================
900 = Throws out all purgable stuff and compresses movable blocks
902 =====================
905 void MM_SortMem(mminfo_t *mm)
907 mmblocktype huge *scan,huge *last,huge *next;
908 unsigned start,length,source,dest,oldborder;
912 // lock down a currently playing sound
914 /*++++ playing = SD_SoundPlaying ();
920 playing += STARTPCSOUNDS;
923 playing += STARTADLIBSOUNDS;
926 MM_SetLock(&(memptr)audiosegs[playing],true);
931 // oldborder = bordercolor;
932 // VW_ColorBorder (15);
939 last = NULL; // shut up compiler warning
943 if(scan->attributes & LOCKBIT)
946 // block is locked, so try to pile later blocks right after it
948 start = scan->start + scan->length;
952 if(scan->attributes & PURGEBITS)
955 // throw out the purgable block
958 MM_FreeBlock(scan, mm);
966 // push the non purgable block on top of the last moved block
968 if(scan->start != start)
970 length = scan->length;
971 source = scan->start;
973 while(length > 0xf00)
975 movedata(source,0,dest,0,0xf00*16);
980 movedata(source,0,dest,0,length*16);
983 *(unsigned *)scan->useptr = start;
985 start = scan->start + scan->length;
990 scan = scan->next; // go to next block
993 mm->mmrover = mm->mmhead;
998 // VW_ColorBorder (oldborder);
1001 MM_SetLock(&(memptr)audiosegs[playing],false);*/
1005 //==========================================================================
1009 =====================
1013 =====================
1016 void MM_ShowMemory(mminfo_t *mm)
1018 mmblocktype huge *scan;
1019 unsigned color,temp;//, i;
1021 char scratch[80],str[10];
1023 //**** VW_SetDefaultColors();
1024 //**** VW_SetLineWidth(40);
1025 //++++mh temp = bufferofs;
1026 //++++mh bufferofs = 0;
1027 //**** VW_SetScreen (0,0);
1037 if(scan->attributes & PURGEBITS)
1038 color = 5; // dark purple = purgable
1040 color = 9; // medium blue = non purgable
1041 if(scan->attributes & LOCKBIT)
1042 color = 12; // red = locked
1043 if(scan->start<=end)
1045 printf("MM_ShowMemory: Memory block order currupted!");
1048 end = scan->start+scan->length-1;
1049 //++++ VW_Hlin(scan->start,(unsigned)end,0,color);
1050 //++++ VW_Plot(scan->start,0,15);
1051 if(scan->next->start > end+1)
1052 //++++ VW_Hlin(end+1,scan->next->start,0,0); // black = free
1055 printf("Location:");
1056 printf("%x\t", scan->start);
1057 strcpy (scratch,"Size:");
1058 ltoa ((dword)scan->length*16,str,10);
1059 strcat (scratch,str);
1060 strcat (scratch,"\tOwner:0x");
1061 owner = (unsigned)scan->useptr;
1062 ultoa (owner,str,16);
1063 strcat (scratch,str);
1064 strcat (scratch,"\n");
1065 //++++write (debughandle,scratch,strlen(scratch));
1066 fprintf(stdout, "%s", scratch);
1075 //**** VW_SetLineWidth(64);
1076 //++++mh bufferofs = temp;
1080 //==========================================================================
1084 ======================
1088 = Returns the total free space without purging
1090 ======================
1093 dword MM_UnusedMemory(mminfo_t *mm)
1096 mmblocktype huge *scan;
1103 free += scan->next->start - (scan->start + scan->length);
1111 //==========================================================================
1115 ======================
1119 = Returns the total free space with purging
1121 ======================
1124 dword MM_TotalFree(mminfo_t *mm)
1127 mmblocktype huge *scan;
1134 if((scan->attributes&PURGEBITS) && !(scan->attributes&LOCKBIT))
1135 free += scan->length;
1136 free += scan->next->start - (scan->start + scan->length);
1144 //==========================================================================
1147 =====================
1151 =====================
1154 void MM_Report(mminfo_t *mm, mminfotype *mmi)
1156 if(MML_CheckForEMS())
1158 printf("EMM %x available\n", mm->EMSVer);
1159 printf("totalEMSpages=%u\n", mm->totalEMSpages);
1160 printf("freeEMSpages=%u\n", mm->freeEMSpages);
1161 printf("EMSpageframe=%x\n", mm->EMSpageframe);
1163 if(MML_CheckForXMS(mm)) printf("XMSaddr=%Fp\n", *XMSaddr);
1164 printf("near=%lu\n", mmi->nearheap);
1165 printf("far=%lu\n", mmi->farheap);
1166 printf("EMSmem=%lu\n", mmi->EMSmem);
1167 printf("XMSmem=%lu\n", mmi->XMSmem);
1168 printf("mainmem=%lu\n", mmi->mainmem);
1169 printf("UnusedMemory=%lu\n", MM_UnusedMemory(mm));
1170 printf("TotalFree=%lu\n", MM_TotalFree(mm));
1172 // printf("UnusedMemory=%lu kb\n", MM_UnusedMemory()/10248);
1173 // printf("TotalFree=%lu kb\n", MM_TotalFree()/10248);
1176 //==========================================================================
1179 =====================
1183 =====================
1198 //==========================================================================
1201 =====================
1205 =====================
1208 void MM_BombOnError(boolean bomb, mminfo_t *mm)
1210 mm->bombonerror = bomb;
1213 void MM_GetNewBlock(mminfo_t *mm)
1217 mm->mmnew=mm->mmfree;
1218 mm->mmfree=mm->mmfree->next;
1219 /*if(!(mm->mmnew=mm->mmfree))
1221 printf("MM_GETNEWBLOCK: No free blocks!");
1224 mm->mmfree=mm->mmfree->next;*/
1227 void MM_FreeBlock(mmblocktype *x, mminfo_t *mm)
1234 void MM_seguin(void)
1243 void MM_segude(void)
1251 pull data from far and put it into ds var