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 MML_UseSpace(base,size, mm);
375 mmi->XMSmem += size*16;
376 mm->UMBbase[mm->numUMBs] = base;
378 if(mm->numUMBs < MAXUMBS)
384 ======================
388 ======================
391 void MML_ShutdownXMS(mminfo_t *mm)
396 for (i=0;i<mm->numUMBs;i++)
398 base = mm->UMBbase[i];
403 call [DWORD PTR XMSaddr]
408 //==========================================================================
411 ======================
415 = Marks a range of paragraphs as usable by the memory manager
416 = This is used to mark space for the near heap, far heap, ems page frame,
417 = and upper memory blocks
419 ======================
422 void MML_UseSpace(unsigned segstart, dword seglength, mminfo_t *mm)
424 mmblocktype huge *scan,huge *last;
430 scan = last = mm->mmhead;
431 mm->mmrover = mm->mmhead; // reset rover to start of memory
434 // search for the block that contains the range of segments
436 while(scan->start+scan->length < segstart)
443 // take the given range out of the block
445 oldend = scan->start + scan->length;
446 extra = oldend - (segstart+seglength);
450 segm=(extra%(0xfffflu))-1;
453 //printf("extra=%lu ", extra);
454 //printf("segm=%lu\n", segm);
455 printf("MML_UseSpace: Segment spans two blocks!\n");
459 //++++todo: linked list of segment!
460 //printf("segm=%lu\n", segm);
461 if(segstart == scan->start)
463 last->next = scan->next; // unlink block
464 MM_FreeBlock(scan, mm);
468 scan->length = segstart-scan->start; // shorten block
472 if(0xfffflu > extra > 0)
475 mm->mmnew->next = scan->next;
476 scan->next = mm->mmnew;
477 mm->mmnew->start = segstart+seglength;
478 mm->mmnew->length = extra;
479 mm->mmnew->attributes = LOCKBIT;
480 }//else if(segm>0) goto segu;
484 //==========================================================================
491 = We are out of blocks, so free a purgable block
496 void MML_ClearBlock(mminfo_t *mm)
498 mmblocktype huge *scan,huge *last;
500 scan = mm->mmhead->next;
504 if(!(scan->attributes&LOCKBIT) && (scan->attributes&PURGEBITS))
506 MM_FreePtr(scan->useptr, mm);
512 printf("MM_ClearBlock: No purgable blocks!\n");
516 //==========================================================================
523 = Grabs all space from turbo with malloc/farmalloc
524 = Allocates bufferseg misc buffer
529 void MM_Startup(mminfo_t *mm, mminfotype *mmi)
532 dword length;//,farlen;
534 unsigned segstart,seglength,endfree;
539 mm->mmstarted = true;
540 mm->bombonerror = true;
542 // set up the linked list (everything in the free list;
545 mm->mmfree = &(mm->mmblocks[0]);
546 for(i=0;i<MAXBLOCKS-1;i++)
548 mm->mmblocks[i].next = &(mm->mmblocks[i+1]);
550 mm->mmblocks[i].next = NULL;
553 // locked block of all memory until we punch out free space
556 mm->mmhead = mm->mmnew; // this will allways be the first node
557 mm->mmnew->start = 0;
558 mm->mmnew->length = 0xffff; //todo: mm make it fucking massive as fuck!~
559 mm->mmnew->attributes = LOCKBIT;
560 mm->mmnew->next = NULL;
561 mm->mmrover = mm->mmhead;
563 // farlen=_bios_memsize()*1024;
566 // get all available near conventional memory segments
568 //---- length=coreleft();
571 start = (void huge *)(mm->nearheap = malloc(length));
573 length -= 16-(FP_OFF(start)&15);
574 length -= SAVENEARHEAP;
575 seglength = length / 16; // now in paragraphs
576 segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
577 MML_UseSpace(segstart,seglength, mm);
578 mmi->nearheap = length;
581 // get all available far conventional memory segments
583 //---- length=farcoreleft();
587 start = mm->farheap = halloc(length, sizeof(dword));
588 //start = mm->farheap = _fmalloc(length);
589 length -= 16-(FP_OFF(start)&15);
590 length -= SAVEFARHEAP;
591 seglength = length / 16; // now in paragraphs
592 segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;
593 MML_UseSpace(segstart,seglength, mm);
594 mmi->farheap = length;
595 mmi->mainmem = mmi->nearheap + mmi->farheap;
599 // detect EMS and allocate up to 64K at page frame
601 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!
603 for(i = 1;i < __argc;i++)
605 if(US_CheckParm(__argv[i],ParmStringsexmm) == 0)
606 goto emsskip; // param NOEMS
608 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!
609 if(MML_CheckForEMS())
612 MML_SetupEMS(mm); // allocate space
613 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!
614 //TODO: EMS4! AND EMS 3.2 MASSIVE DATA HANDLMENT!
615 MML_UseSpace(mm->EMSpageframe,((dword)mm->EMSpagesmapped)*0x4000lu, mm);
617 MM_MapEMS(mm); // map in used pages
619 mmi->EMSmem = ((dword)mm->EMSpagesmapped)*0x4000lu;
623 // detect XMS and get upper memory blocks
627 for(i = 1;i < __argc;i++)
629 if(US_CheckParm(__argv[i],ParmStringsexmm) == 0)
630 goto xmsskip; // param NOXMS
632 // 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!
633 if(MML_CheckForXMS(mm))
636 MML_SetupXMS(mm, mmi); // allocate as many UMBs as possible
640 // allocate the misc buffer
643 mm->mmrover = mm->mmhead; // start looking for space after low block
645 MM_GetPtr(&(mm->bufferseg),BUFFERSIZE, mm, mmi);
648 //==========================================================================
655 = Frees all conventional, EMS, and XMS allocated
660 void MM_Shutdown(mminfo_t *mm)
666 printf("far freed\n");
668 printf("near freed\n");
669 //hfree(mm->hugeheap);
670 //printf("huge freed\n");
671 if(MML_CheckForEMS()){ MML_ShutdownEMS(mm); printf("EMS freed\n"); }
672 if(MML_CheckForXMS(mm)){ MML_ShutdownXMS(mm); printf("XMS freed\n"); }
675 //==========================================================================
682 = Allocates an unlocked, unpurgable block
687 void MM_GetPtr(memptr *baseptr,dword size, mminfo_t *mm, mminfotype *mmi)
689 mmblocktype huge *scan,huge *lastscan,huge *endscan,huge *purge,huge *next;
691 unsigned needed,startseg;
693 needed = (size+15)/16; // convert size from bytes to paragraphs
695 MM_GetNewBlock(mm); // fill in start and next after a spot is found
696 mm->mmnew->length = needed;
697 mm->mmnew->useptr = baseptr;
698 mm->mmnew->attributes = BASEATTRIBUTES;
700 for(search = 0; search<3; search++)
703 // first search: try to allocate right after the rover, then on up
704 // second search: search from the head pointer up to the rover
705 // third search: compress memory, then scan from start
706 if(search == 1 && mm->mmrover == mm->mmhead)
712 lastscan = mm->mmrover;
713 scan = mm->mmrover->next;
717 lastscan = mm->mmhead;
718 scan = mm->mmhead->next;
719 endscan = mm->mmrover;
723 lastscan = mm->mmhead;
724 scan = mm->mmhead->next;
729 startseg = lastscan->start + lastscan->length;
731 while(scan != endscan)
733 if(scan->start - startseg >= needed)
736 // got enough space between the end of lastscan and
737 // the start of scan, so throw out anything in the middle
738 // and allocate the new block
740 purge = lastscan->next;
741 lastscan->next = mm->mmnew;
742 mm->mmnew->start = *(unsigned *)baseptr = startseg;
743 mm->mmnew->next = scan;
745 { // free the purgable block
747 MM_FreeBlock(purge, mm);
748 purge = next; // purge another if not at scan
750 mm->mmrover = mm->mmnew;
751 return; // good allocation!
755 // if this block is purge level zero or locked, skip past it
757 if((scan->attributes & LOCKBIT)
758 || !(scan->attributes & PURGEBITS) )
761 startseg = lastscan->start + lastscan->length;
765 scan=scan->next; // look at next line
770 printf(OUT_OF_MEM_MSG,(size-mmi->nearheap));
775 //==========================================================================
782 = Allocates an unlocked, unpurgable block
787 void MM_FreePtr(memptr *baseptr, mminfo_t *mm)
789 mmblocktype huge *scan,huge *last;
794 if(baseptr == mm->mmrover->useptr) // removed the last allocated block
795 mm->mmrover = mm->mmhead;
797 while(scan->useptr != baseptr && scan)
805 printf("MM_FreePtr: Block not found!");
809 last->next = scan->next;
811 MM_FreeBlock(scan, mm);
813 //==========================================================================
816 =====================
820 = Sets the purge level for a block (locked blocks cannot be made purgable)
822 =====================
825 void MM_SetPurge(memptr *baseptr, int purge, mminfo_t *mm)
827 mmblocktype huge *start;
833 if(mm->mmrover->useptr == baseptr)
836 mm->mmrover = mm->mmrover->next;
839 mm->mmrover = mm->mmhead;
840 else if(mm->mmrover == start)
842 printf("MM_SetPurge: Block not found!");
848 mm->mmrover->attributes &= ~PURGEBITS;
849 mm->mmrover->attributes |= purge;
852 //==========================================================================
855 =====================
859 = Locks / unlocks the block
861 =====================
864 void MM_SetLock(memptr *baseptr, boolean locked, mminfo_t *mm)
866 mmblocktype huge *start;
872 if(mm->mmrover->useptr == baseptr)
875 mm->mmrover = mm->mmrover->next;
878 mm->mmrover = mm->mmhead;
879 else if(mm->mmrover == start)
881 printf("MM_SetLock: Block not found!");
887 mm->mmrover->attributes &= ~LOCKBIT;
888 mm->mmrover->attributes |= locked*LOCKBIT;
891 //==========================================================================
894 =====================
898 = Throws out all purgable stuff and compresses movable blocks
900 =====================
903 void MM_SortMem(mminfo_t *mm)
905 mmblocktype huge *scan,huge *last,huge *next;
906 unsigned start,length,source,dest,oldborder;
910 // lock down a currently playing sound
912 /*++++ playing = SD_SoundPlaying ();
918 playing += STARTPCSOUNDS;
921 playing += STARTADLIBSOUNDS;
924 MM_SetLock(&(memptr)audiosegs[playing],true);
929 // oldborder = bordercolor;
930 // VW_ColorBorder (15);
937 last = NULL; // shut up compiler warning
941 if(scan->attributes & LOCKBIT)
944 // block is locked, so try to pile later blocks right after it
946 start = scan->start + scan->length;
950 if(scan->attributes & PURGEBITS)
953 // throw out the purgable block
956 MM_FreeBlock(scan, mm);
964 // push the non purgable block on top of the last moved block
966 if(scan->start != start)
968 length = scan->length;
969 source = scan->start;
971 while(length > 0xf00)
973 movedata(source,0,dest,0,0xf00*16);
978 movedata(source,0,dest,0,length*16);
981 *(unsigned *)scan->useptr = start;
983 start = scan->start + scan->length;
988 scan = scan->next; // go to next block
991 mm->mmrover = mm->mmhead;
996 // VW_ColorBorder (oldborder);
999 MM_SetLock(&(memptr)audiosegs[playing],false);*/
1003 //==========================================================================
1007 =====================
1011 =====================
1014 void MM_ShowMemory(mminfo_t *mm)
1016 mmblocktype huge *scan;
1017 unsigned color,temp;//, i;
1019 char scratch[80],str[10];
1021 //**** VW_SetDefaultColors();
1022 //**** VW_SetLineWidth(40);
1023 //++++mh temp = bufferofs;
1024 //++++mh bufferofs = 0;
1025 //**** VW_SetScreen (0,0);
1035 if(scan->attributes & PURGEBITS)
1036 color = 5; // dark purple = purgable
1038 color = 9; // medium blue = non purgable
1039 if(scan->attributes & LOCKBIT)
1040 color = 12; // red = locked
1041 if(scan->start<=end)
1043 printf("MM_ShowMemory: Memory block order currupted!");
1046 end = scan->start+scan->length-1;
1047 //++++ VW_Hlin(scan->start,(unsigned)end,0,color);
1048 //++++ VW_Plot(scan->start,0,15);
1049 if(scan->next->start > end+1)
1050 //++++ VW_Hlin(end+1,scan->next->start,0,0); // black = free
1053 printf("Location:");
1054 printf("%x\t", scan->start);
1055 strcpy (scratch,"Size:");
1056 ltoa ((dword)scan->length*16,str,10);
1057 strcat (scratch,str);
1058 strcat (scratch,"\tOwner:0x");
1059 owner = (unsigned)scan->useptr;
1060 ultoa (owner,str,16);
1061 strcat (scratch,str);
1062 strcat (scratch,"\n");
1063 //++++write (debughandle,scratch,strlen(scratch));
1064 fprintf(stdout, "%s", scratch);
1073 //**** VW_SetLineWidth(64);
1074 //++++mh bufferofs = temp;
1078 //==========================================================================
1082 ======================
1086 = Returns the total free space without purging
1088 ======================
1091 dword MM_UnusedMemory(mminfo_t *mm)
1094 mmblocktype huge *scan;
1101 free += scan->next->start - (scan->start + scan->length);
1109 //==========================================================================
1113 ======================
1117 = Returns the total free space with purging
1119 ======================
1122 dword MM_TotalFree(mminfo_t *mm)
1125 mmblocktype huge *scan;
1132 if((scan->attributes&PURGEBITS) && !(scan->attributes&LOCKBIT))
1133 free += scan->length;
1134 free += scan->next->start - (scan->start + scan->length);
1142 //==========================================================================
1145 =====================
1149 =====================
1152 void MM_Report(mminfo_t *mm, mminfotype *mmi)
1154 if(MML_CheckForEMS())
1156 printf("EMM %x available\n", mm->EMSVer);
1157 printf("totalEMSpages=%u\n", mm->totalEMSpages);
1158 printf("freeEMSpages=%u\n", mm->freeEMSpages);
1159 printf("EMSpageframe=%x\n", mm->EMSpageframe);
1161 if(MML_CheckForXMS(mm)) printf("XMSaddr=%x\n", *XMSaddr);
1162 printf("near=%lu\n", mmi->nearheap);
1163 printf("far=%lu\n", mmi->farheap);
1164 printf("EMSmem=%lu\n", mmi->EMSmem);
1165 printf("XMSmem=%lu\n", mmi->XMSmem);
1166 printf("mainmem=%lu\n", mmi->mainmem);
1167 printf("UnusedMemory=%lu\n", MM_UnusedMemory(mm));
1168 printf("TotalFree=%lu\n", MM_TotalFree(mm));
1170 // printf("UnusedMemory=%lu kb\n", MM_UnusedMemory()/10248);
1171 // printf("TotalFree=%lu kb\n", MM_TotalFree()/10248);
1174 //==========================================================================
1177 =====================
1181 =====================
1196 //==========================================================================
1199 =====================
1203 =====================
1206 void MM_BombOnError(boolean bomb, mminfo_t *mm)
1208 mm->bombonerror = bomb;
1211 void MM_GetNewBlock(mminfo_t *mm)
1215 mm->mmnew=mm->mmfree;
1216 mm->mmfree=mm->mmfree->next;
1217 /*if(!(mm->mmnew=mm->mmfree))
1219 printf("MM_GETNEWBLOCK: No free blocks!");
1222 mm->mmfree=mm->mmfree->next;*/
1225 void MM_FreeBlock(mmblocktype *x, mminfo_t *mm)